JP6532512B2 - Quay or revetment structure and its construction method - Google Patents

Description

  The present invention relates to a quay or revetment structure and a method of constructing the quay regardless of existing quay or revetment repair or construction.

  As this type of existing quay or revetment structure, revetments and quay constructed using steel sheet piles and steel pipe piles are easy to construct and have the merit of being able to create a high rigidity wall in the constriction part, etc. The prior art is known. A concrete revetment wall constructed by stacking heavy-weight concrete blocks along a slope is also known as a prior art.

  The first prior art using this steel sheet pile is a seismic quay provided for seismic strengthening of the quay, and the steel sheet pile wall extending in the cross direction intersecting the existing quay and the existing quay are connected to the above-mentioned quay. And a connecting member extending in a cross direction, wherein the steel sheet pile wall is provided by integrating the heads of all or a part of the plurality of steel sheet piles, and the extending length extending in the cross direction corresponds to each of the It is an earthquake-resistant wharf structure characterized by being half or more of the member length of the material axial direction of a steel sheet pile (patent document 1).

  And, in a state in which all or part of the heads of the plurality of steel sheet piles are integrated, a steel sheet pile wall extending in a direction intersecting with the existing quaywall is provided, whereby the large combined rigidity of the plurality of steel sheet piles is exceeded. It is possible to exert the second moment of area.

  Further, the second prior art using a heavy-weight concrete block integrally has a fixing anchor portion embedded in the embankment fill on the back surface of the square-shaped thick plate block body, and the surface side of the block body On the embankment surface of the embankment are provided with a plurality of longitudinally facing projecting ribs, and the projecting side end portions of the projecting ribs integrally have bulged portions projecting like flanges on the left and right. The concrete revetment wall is constructed by arranging many protuberances in a row in which the protuberance ribs are continuously arranged up and down, and the protuberance ribs on the surface of the concrete revetment wall are embedded, and a surface embankment of a certain thickness is laid on the surface It is a revegetation revetment where vegetation is applied to the embankment (Patent Document 2).

  According to this revegetation revetment, the slope of the embankment embankment will be completely covered by the concrete revetment wall made of concrete blocks, and the river will be flooded by heavy rain and will not collapse even if the slope is washed, The surface embankment is integrated with the vegetation and fitted into the dovetail-shaped ditch, so that it is not easily washed away and greening is maintained.

JP 2017-82454 A Japanese Patent Application Laid-Open No. 6-248627

  However, in the first prior art, the revetment and quay constructed using steel sheet piles and steel pipe piles are in contact with seawater in any use mode, and therefore corrosion or corrosion in a severe corrosive environment Deterioration will progress and eventually structural strength will be insufficient and it will need to be updated regularly. If it renews, construction becomes large-scaled, and there is a problem that not only the problem that huge cost is required but also the port facility can not be used during the construction period.

  Further, in the second prior art, the revetment wall constructed using heavy-weight concrete blocks has a structure to support the earth pressure by the weight of the concrete block, and the weight of the concrete block is large. At times, a large transport truck and lifting equipment are required, which is costly. Further, as shown in Patent Document 2, it is common to connect bars using bars (rebars), and a foundation is necessary to fix the lower ends of the bars (rebars), It takes cost and labor. Furthermore, the revetment wall structure in which blocks are connected and integrated by steel bars (rebars) is weak at the connection part, and seam opening and relative displacement occur between blocks at the time of earthquake, and the whole revetment wall inclines. There are reports of earthquake damage that have become unusable.

  Therefore, in the present invention, in order to solve the above-mentioned problems, the weight of the precast member during transportation and construction is reduced, the entire structure is strengthened, the quake resistance is improved, and the construction is simple and economical quay or revetment. The purpose is to provide a structure and a method for its construction.

As a specific means for solving the problems of the conventional example described above, according to the first aspect of the present invention, a perforated PC plate (a product equivalent to JIS A6511) in which a plurality of holes are formed in the cross section to reduce weight Quay or revetment structure formed by piling up a plurality of tendon insertion holes drilled to a required depth in the ground at the position where the perforated PC plate is stacked, and The tendon continuous with at least a portion of the plurality of holes penetrates from the top to the bottom, and the lower end of the tendon is disposed to the bottom of the tendon insertion hole , and the tendon insertion hole is filled A fixing PC plate having a sheath for tension material insertion and a fixing portion provided at the top of the piled perforated PC plates is installed on the ground by hardening of the grout, and The upper end penetrates through the sheath Is tensioned fixed by the fixing portion of the PC version, the fixing PC version perforated PC version and the top piled on the ground together with the pre-stress is applied, perforated PC version each other and fixing PC version PC Crimping To provide a quay or revetment structure characterized by being joined and integrated.

In the first invention, in the horizontal direction (the wall extension direction of the quay) of the stacked perforated PC plates, the tension material for lateral tightening is predetermined in the vertical direction of the perforated PC plates across the plurality of plates. multiple arranged at intervals, by stressing anchorage tendons for lateral clamping, the perforated PC version with prestress is applied, it is integrated perforated PC version between adjacent; said hole A perforated PC plate is provided with longitudinal ribs in which said continuous tendon is penetrated from the top of the perforated PC plate over its entire length to a predetermined depth of ground; and through said longitudinal ribs The method further includes, as an additional requirement, a diagonal cable be disposed from the top of the perforated PC plate piled up on the ground to a predetermined depth of the ground and tensioned.

In addition, the second invention according to the present invention is to construct a quay or revetment formed by piling up a holed PC plate (a product equivalent to JIS A6511) which is lightened by forming a plurality of holes in the cross section on the ground. In the method, a plurality of tendon insertion holes drilled to a required depth are provided on the ground at a position where the perforated PC plate is stacked, and the perforated PC plate is stacked and arranged thereon, and a fixing tool is provided at the top A fixing PC plate having a fixing portion for installation and at least a part of the hole of the perforated PC plate from the bottom to the lower surface of the fixing portion as a tendon insertion hole, and provided with a sheath according to the position of the hole. And the PC cable consisting of a plurality of PC steel strands as the tension material is a continuous one without providing an intermediate connector, and the tension material inserted into the ground from the uppermost fixing PC plate is inserted. Insert to the bottom of the hole and Ingredients were the temporarily fixed state by mounting said after the lower end of the tendon grout is filled and cured into insertion hole tendon is fixed to the ground, the top end of the tension member in the fixing unit The sheath of the fixing PC plate is penetrated and tensioned and fixed at the fixing portion, prestressing is applied to the stacked perforated PC plate and the fixing PC plate at the top, and the PC plates and the fixing PC plate are The present invention provides a quay or revetment construction method characterized by crimping and integration.

According to the quay or revetment structure and the construction method thereof according to the present invention, the excellent effects as described below are exhibited.
1. By using the perforated PC plate, it is possible to reduce the weight of the member at the time of transportation and erection, and a large-sized construction facility becomes unnecessary, and the cost can be reduced.
2. By using the holes of the PC plate, it is possible to dispense with the conventional through holes and sheaths dedicated to the tendon. In addition, since it is possible to place a continuous tendon from the top to a predetermined depth of the ground without using any intermediate joint coupler or the like, the workability is good and the construction is simple and economically excellent.
3. The tension material placed in the ground is fixed in the ground by hardening the grout filled in the anchor fixing part via the PC connection part, and the PC version constructed by piling up on the ground tension fixes the continuous tension material As a result, the whole is integrated, and it becomes unnecessary to provide a concrete foundation or a pile foundation at the base of the concrete block as in the prior art, and it is possible to achieve construction labor saving and cost reduction. Moreover, while prestressing is given to the PC version main body, the PC versions are pressure-bonded to each other to form a strong earthquake-resistant structure, which is significantly stronger than the conventional rebar connection structure.
4. The PC plate arranged side by side is the same as the vertical direction (wall height direction of the quay) by arranging the tension material for horizontal tightening in the horizontal direction of the PC version (the wall extension direction of the quay) and tightening and fixing it. And the adjacent PC plates are pressure-bonded and integrated to form a strong earthquake-resistant structure, and as a result, the entire wall is prestressed in two directions, vertical and horizontal. In both directions, the PC crimped joint structure is adopted, resulting in a structure with excellent seismic performance.
5. Since the thickness of the PC plate main body can be reduced by providing the longitudinal rib on the perforated PC plate and arranging the tension material for tension fixing, the weight can be reduced and the economy can be achieved.
6. If the height of the quay and revetment is relatively high, by arranging the diagonal cable,
Stable structural performance can be obtained without increasing the plate thickness of the perforated PC plate, tension material, etc., and more economic efficiency can be achieved.
7. In addition, when prestressing pre-tensioned PC plate in advance by pretension method, it is possible to prevent cracking and damage of PC plate at the time of transportation and erection, and the wall body also becomes stronger, and erection It has the effect of reducing the amount of tendon to be inserted after
8. By using the concrete PC plate, the durability is improved and the running cost is significantly reduced, without the steel sheet pile being corroded and having to be renewed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view of only the principal part which showed the quay or revetment structure which concerns on 1st Embodiment in 1st invention of this invention roughly. It is a cross-sectional view of only the principal part which showed the berth or revetment structure which concerns on the embodiment roughly. It is an expanded sectional view which shows an example of the preferable tendon (PC cable) used for the wharf or revetment structure which concerns on the embodiment. It is a schematic cross-sectional view of an example showing the composition of the vertical tightening tendon (PC cable) used for the wharf or revetment structure concerning the embodiment. It is sectional drawing which shows the structure of the longitudinal tightening or horizontal tightening tendon (single unbonded PC steel strand) other example used for the wharf or revetment structure which concerns on the embodiment. It is sectional drawing which shows the structure of the anchor fixing | fixed part at the time of using the tension | tensile material (single unbonded PC steel strand) of another example used for the quay or revetment structure which concerns on the embodiment. It is a longitudinal cross-sectional view of only the principal part which showed the quay or revetment structure which concerns on 2nd Embodiment in 1st invention of this invention roughly. It is a cross-sectional view of only the principal part which showed the berth or revetment structure which concerns on the embodiment roughly. It is a longitudinal cross-sectional view of only the principal part which showed the quay or revetment structure which concerns on 3rd Embodiment in 1st invention of this invention roughly. It is a cross-sectional view of only the principal part which showed the berth or revetment structure which concerns on the embodiment roughly. It is explanatory drawing which showed the 1st process of the method of constructing the wharf or revetment structure which concerns on 1st Embodiment in 2nd invention of this invention by a schematic cross section. It is explanatory drawing which showed the 2nd process concerning the embodiment by a rough cross section. It is explanatory drawing which showed the 3rd process concerning the embodiment by a schematic cross section. It is explanatory drawing which showed the 4th process concerning the embodiment by a rough cross section. It is explanatory drawing which showed the 5th process concerning the embodiment by a rough cross section. It is explanatory drawing which showed the 6th process concerning the embodiment by a rough cross section. It is explanatory drawing which showed the 4th process of the method of constructing the wharf or revetment structure which concerns on 2nd Embodiment in 2nd invention of this invention by a cross-sectional view roughly. It is explanatory drawing which showed the 5th process concerning the embodiment by a rough cross section. It is explanatory drawing which showed the 6th process concerning the embodiment by a rough cross section.

  The present invention will be described in detail based on the illustrated embodiments. First, the quay or revetment structure and its construction method will be described with reference to FIGS. 1 and 2 showing a specific embodiment. The quay or revetment 1 generally includes an anchor fixing portion 3 provided on the seabed 2 and A PC wall portion 4 installed adjacent to the ground wall 2 in the wall extension direction of the quay or revetment and stacked up, and the stacked PC wall portion 4 connected to the anchor fixing portion 3 It is comprised from the PC connection part 5 fixed to the said ground 2. FIG.

  The PC wall 4 is, as shown in FIG. 2, a precast concrete plate 4a having a plurality of holes 6 (hereinafter referred to as a perforated PC plate) horizontally on the ground 2 (wall extension direction of quay or revetment = horizontal) Next to each other, and stacked or stacked in the height direction (longitudinal direction) on the top of each perforated PC plate 4a, and the PC plate 4b for fixing is installed on the top. Built. The fixing PC plate 4b has a fixing portion 4c in the form of a notch for fixing tool installation, and a sheath 7 is disposed below the fixing portion 4c in alignment with the hole position of the perforated PC plate 4a. However, the fixing PC version 4b and the uppermost perforated PC version 4a can be integrated in advance.

  In the ground 2, according to the positions of the holes 6 (all in the illustrated example) to which the tendon 12 is to be placed, among the plurality of holes 6 of the perforated PC plate 4a scheduled to be constructed, The tendon insertion hole 8 is formed by drilling to a predetermined depth. In the tendon insertion hole 8, from the solid ground 2 to the required length (depth), the anchor fixing portion 3 is used, and the softness with no fixing function from the lower end of the PC wall 4 installed on the ground 2 The PC connection portion 5 is defined as a solid ground 2b through the ground 2a. In addition, when there is no soft ground 2 a on the surface of the ground 2, it is assumed that the PC connecting portion 5 may not be provided substantially.

  Further, as shown in the above embodiment, the soft ground 2a is dug down from the surface of the ground 2 to a predetermined depth and a recess 9 having a required width is formed in parallel with the sea surface. It is desirable that the base mound 11 be formed by forming the base 10 and forming the perforated PC plate 4a and then backfilling it with gravel, crushed stone, etc., but if there is no soft ground 2a on the upper surface of the ground 2, the recess The formation of 9 and the base mound 11 may not be provided. In that case, the non-shrinkage mortar base 10 is formed directly on the surface of the ground 2, and the upper surface of the mortar base 10 is approximately horizontal even if there is a slight difference in thickness corresponding to the unevenness of the ground. And the perforated PC plate 4a is placed thereon.

  Furthermore, in the embodiment shown in FIG. 2, it is assumed that at least 2 or more and 5 holes are made per holed PC plate 4 a, and the tendon 12 is inserted into all the holes, and the tendon provided in the ground 2 The number of the holes for insertion 8 should be five or more at two or more places, but the number is not limited to this, and the number of holes may be determined in accordance with the required number of tendons. For example, even if there are five holes per hole in the perforated PC plate 4a, if the number of the tendons 12 to be inserted is three, the number of the tendon insertion holes 8 to be drilled in the ground 2 is three. can do. That is, the number of drillings in the ground 2 and the number of holes in the upper perforated PC plate 4a do not always match, and they may be different.

  After the anchor fixing portion 3 (including the tendon insertion hole 8), the PC connecting portion 5 and the PC wall portion 4 described above are formed, the vertically-clamped cable serving as the tendon 12 is the entire length from the top of the PC wall portion 4 Through the PC connecting part 5 and inserting it to the bottom of the tendon insertion hole 8 in the anchor fixing unit 3, and filling the grout 13 in the gap between the vertically fastened cable and the tendon insertion hole 8 By curing it, the anchor fixing portion 3 is easily formed as the fixed end of the vertically clamped cable without using a conventional cable fixing tool. After that, by using a required fixing tool 14 in the fixing portion 4c provided at the top of the PC wall portion 4 to tension and fix the vertically-clamped cable, pre-stress is given to the perforated PC plate 4a, and further A grout is filled in the holes 6 of the PC wall portions 4 and hardened, and the PC wall portions 4 are formed in which the upper and lower PC plates 4a are bonded by pressure bonding on the joint surface 15 and integrated. Therefore, the PC wall 4 becomes a quay or revetment wall structure 1 firmly fixed to the ground 2 by the anchor fixing unit 3 through the PC connecting unit 5.

The tendon 12 shown in the above-described embodiment shows a state where it is disposed as a result of combining a plurality of tendons, and conceptually illustrates the present invention, and the actual number and arrangement of the tendons are described. It does not indicate the situation.
Further, at the time of factory production of the perforated PC plate 4a constituting the PC wall portion 4, it is preferable that a plurality of primary cables 16 be arranged in advance on the PC plate 4a and tensioned and fixed separately to apply prestress. The primary cable 16 is preferably tensioned and fixed by a pretension method, but may be a post tension method.
In addition, it is preferable to carry out an anticorrosion treatment on the tendon 12 by filling grout in the bored hole 8 for the tendon insertion and the hole 6 of the PC plate 4a.

Furthermore, in the horizontal direction (the wall extension direction of the wharf or the revetment = horizontal direction), the PC plate 4a is installed and constructed adjacently as described above to form the PC wall portion. A plurality of sheaths (not shown) are disposed horizontally in the horizontal direction, through which transverse clamp cables 17 as tension members are inserted and connected and fixed at regular intervals (for example, 20 to 30 m) The adjacent PC version 4a is integrated to form a quay or revetment wall.
The lateral tightening cable 17 as a tension member shown in FIGS. 1 and 2 is for explaining the concept of the present invention, and does not indicate the actual specific arrangement or number, the size of the sheath, or the like.
After that, as in the conventional case, the backstone 18 and the backfilling soil 19 are backfilled in the back face of the formed quay or revetment structure 1, and the paving concrete 20 is cast on the top surface to form a pier and a bay facility.

The tendons 12 and 17 used in the embodiment are PC cables formed by bundling a plurality of PC steel strands 36.
That is, as the PC steel strand wire 36 used, it is the PC steel strand wire of patent 2691113 owned by the applicant, and as shown in FIG. It is preferable to use a wire 36 (7 strands, trade name: SC strand) in which side wires 23 are twisted around the core wire 22.

For example, as the tendon 12 used as the vertical fastening cable, as shown in FIG. 4, from the seven cables, the coated PC steel stranded wire 36 (SC strand) is a PC cable composed of three SC strands; Alternatively, the grout 13 may be filled between the PC cable and the hole 6 or the sheath through the sheath.
In addition, when using the coated PC steel stranded wire 36, the tendon 12 can be unbonded by filling the hole 6 or the sheath and the tendon 12 with no grout except for the anchor fixing portion 3 , The grout filling site work can be omitted.

Furthermore, as shown in FIG. 5, a single PE (polyethylene) coating 24 is covered on the outer periphery of the coated PC steel stranded wire 36 in a cylindrical shape, and a gap is filled with an anticorrosive material 25 such as grease or wax. Unbonded PC steel strands can be used as tendons 12. It is also possible to use a PC steel strand 36 which is not coated with a single unbonded PC strand.
For example, in the case where a plurality of (three) single unbonded PC cables are used as the tension members 12, as shown in FIG. 6, the tension members 12 disposed in the anchor fixing portion 3 are PE coated 24 is cut off to expose the coated (or unpainted) PC steel wire 36. Thus, after the tendon 12 is inserted into the tendon insertion hole 8 by removing the PE coating 24 in the anchor fixing unit 3 in advance, the grout 13 from the anchor fixing unit 3 to the top of the PC wall 4 is provided. When the grout hardens, the anchor fixing portion 3 becomes the lower fixing portion, and after that, the tension material 12 can be strained and fixed, and the grout filling operation may be performed only once. Accordingly, grout filling work need not be divided into two steps and can be performed only once, as compared to the case of using a coated PC steel wire 36 not having the PE coating 24 applied thereon, so that labor saving can be achieved.

  In addition, as the tension member 17 used as the horizontal tightening cable, in the same manner as the vertical tightening cable, the tension required for the pressure bonding and integration of the PC wall 4 installed upright from the ground It will be fixed by force. For example, using the coated PC steel stranded wire 36 shown in FIG. 3 or using the conventional unpainted PC steel stranded wire 36 at a plurality of required intervals (in the illustrated example, inside the outer surface) Three pieces, three pieces on the inner side of the inner side), detailed explanation is omitted.

Next, a second embodiment according to the present invention will be described using FIGS. The main body portion of the perforated PC plate constituting the PC wall portion according to the second embodiment is substantially the same as the perforated PC plate 4a according to the first embodiment, and The only difference is that a pair of longitudinal ribs are provided on one side, so the same reference numerals are given to the same parts and a detailed description thereof will be omitted.
A pair of vertical ribs 26 having a mountain-shaped cross section are integrally formed near the left and right ends of one side surface of the perforated PC plate 4a according to the second embodiment, and the central portion of the vertical rib 26 is vertically formed. A sheath 28 is provided through which a reinforcing vertical tightening cable 27 which is an auxiliary or reinforcing tendon is inserted.

  Also in the second embodiment, the PC wall 4 is constructed by stacking the perforated PC plate 4a on the ground 2 as in the first embodiment, and at this time, the PC plate 4a is formed. The anchor fixing portion 3 and the anchor connecting portion 5 by providing the tendon insertion hole 8 and the reinforcement tendon insertion hole 8a of the required depth according to the position of the hole 6 and the sheath 28 of A non-shrinkage mortar base 10 is formed in the recess 9 provided in the ground 2, a perforated PC plate 4 is sequentially stacked thereon, and a fixing PC plate 4b with a longitudinal rib 26 is installed at the uppermost portion. The tension members 12 and 27 are inserted from the top of the PC wall 4 through the PC connecting portion 5 to the bottom of the tension member insertion holes 8 and 8a in the anchor fixing portion 3, and the tension is Fill grouts 13 and 13a in material insertion holes 8 and 8a, and In the fixing portion 4c of the fixing PC plate 4b with the longitudinal rib 26, the tension members 12 (longitudinal tightening cable) and 27 (longitudinal tightening reinforcing cable) are respectively tensioned and fixed by the fixing tool 14 and the quay or revetment The wall structure 1 is formed.

  As described above, by forming the perforated PC plate 4a having the longitudinal rib 26, the thickness of the main body of the PC plate 4a can be reduced and the weight can be reduced, which is easy to handle and economically excellent. Also by inserting the vertically-clamped reinforcing cable 27 in the inside to tighten and fix it, the quay or revetment wall structure 1 becomes stronger.

Furthermore, a third embodiment shown in FIGS. 9 and 10 will be described.
It is formed by installing (suspension) the diagonal cable 29 on the PC wall 4 according to the second embodiment, and except for the installation structure of the diagonal cable 29, the second embodiment and It is almost the same. In order to explain the concept of the present invention, the installation structure of the diagonal cable 29 shown in the drawings shows a preferred embodiment and does not have a configuration limited thereto.
The diagonal cable 29 is, for example, a single unbonded PC steel stranded wire 12 having the PE coating 24 shown in FIG. 5 and is formed by bundling a plurality of single unbonds. It is preferable to use the PC steel strand wire 36 used for single unbonding as the coated PC steel strand wire 36 (SC strand) on which the rust-preventive resin coating film 21 is formed. Good.

  In order to install the diagonal cable 29 on the PC wall 4, it is necessary to slightly change the shape or configuration of the perforated PC plate 4a having the longitudinal rib 26. That is, as shown in FIG. 10, the configuration of the longitudinal rib 26 is formed so as to be expanded in the lateral direction (approximately two pieces) and broadened, and the sheath 28 for inserting the reinforced vertical fastening cable 27 which is a tension material is required. Two are distributed at intervals of Further, since the number of the reinforced vertical fastening cables 27 is increased by two, it is possible to reduce one tension material 12 (longitudinal fastening cable) in the central portion provided in the main body of the perforated PC plate 4a. Then, in the perforated PC plate 4 a located at the top of the PC wall 4, the sheath 30 for inserting the upper end of the diagonal material cable 29 is the center of each longitudinal rib 26, that is, the reinforced vertical fastening cable 27. A fixing portion 31 is formed on the front side (sea side) of the perforated PC plate 4a.

  As for the installation of the diagonal cable 29, as described in the second embodiment, after piling up the perforated PC plate 4a of the quay or revetment wall and fixing the whole, the angle of the diagonal cable 29 and the like are preliminarily set. Calculate the placement situation, drill the tension material insertion hole 32 to a predetermined depth in the ground 2, insert the diagonal cable 29 into the sheath 30 pre-arranged in the perforated PC plate 4a of the PC wall 4; The lower end portion of the diagonal cable 29 is inserted to the bottom of the drilled tendon insertion hole 32, the grout 33 is filled and hardened between the tendon insertion hole 32 and the diagonal cable 29, and the anchor is inserted. After the fixing unit 3 is formed, the diagonal cable 29 is tensioned and fixed by the fixing tool 34 at the fixing unit 31. In addition, a protective pipe 35 is disposed on the outer periphery of the diagonal cable 29 between the longitudinal rib 6 surface of the PC wall 4 and the surface of the ground 2, and as the protective pipe 35, for example, a high density polyethylene pipe ( HDPE) or a steel pipe etc. can be used. In any of the fixing portions, the tension material or the cable is tensioned and fixed with a fixing tool, and then the entire area is filled with grout.

Next, a method according to a second embodiment of the present invention, that is, a method of constructing a wharf or a revetment structure using the perforated PC plate 4a as described in the embodiment of the construction structure, will be described with reference to FIG. The first construction method (embodiment) shown in FIG. 16 will be described.
First, as the first step, as shown in FIG. 11, the seabed or the seabed foundation 2 on which the revetment structure 1 is to be constructed is placed along the length direction (depth direction in the figure) of the quay or revetment structure 1 The surface of the ground 2 is dug down to a predetermined depth with a required width to form a linear recess 9 and a mortar base 10 of a required thickness with non-shrink mortar is formed in the center of the recess 9 along the length direction The upper surface of the mortar base 10 is formed substantially in parallel (horizontal) with the sea surface.

  The mortar base 10 is penetrated according to the positions of the plurality of holes 6 of the perforated PC plate 4a built up on the mortar base 10, and drilled to a predetermined depth of the ground 2 as the anchor fixing portion 3 A tendon insertion hole 8 is formed. In the tendon insertion hole 8, from the solid ground 2b to the required length (depth), the anchor fixing portion 3 is formed, and the soft ground 2a having no fixing function from the lower side of the recess 9 formed in the ground 2 The PC connecting portion 5 is taken to reach the solid ground 2 b.

As the second step, as shown in FIG. 12, according to the positions of the holes of the tendon insertion hole 8 drilled, the perforated PC plate 4a having a plurality of holes is placed on the mortar base 10, quay or revetment. The first stage is installed by sequentially adjoining in the longitudinal direction of the structure.
As described in the first to third embodiments, when there is no soft ground 2 a on the surface of the ground 2, the PC connecting part 5 may not be provided substantially. After installing the perforated PC plate 4a, it is desirable to backfill gravel, crushed stone, etc. in the recess 9 to form the base mound 11, but if there is no soft ground 2a on the upper surface of the ground 2, the recess 9 and The base mound 11 may not be provided. In that case, it is preferable to form the non-shrinkage mortar base 10 directly on the surface of the ground 2 and install the perforated PC plate 4a thereon.

  As the third step, as shown in FIG. 13, the holes are aligned on the holed PC plate 4a of the first step, and the holed PC plate is formed sequentially from the second step to the third step and the fourth step. 4a is stacked and installed, and the fixing PC version 4b is installed at the top. The fixing PC plate 4b is provided with a notched fixing portion 4c for fixing tool installation, and the sheath 7 is aligned with the hole position of the stacked PC plate 4a stacked from the bottom to the lower end of the fixing portion 4c. Is placed.

  As the fourth step, as shown in FIG. 14, for example, the PC cable 12 composed of a plurality of PC steel strands 36 shown in FIG. 4 is used as a tendon, and the PC cable 12 is an intermediate connector. Use a continuous one without provision. Then, the PC cable 12 is inserted from the uppermost fixing PC plate 4b to the bottom of the tendon insertion hole 8 of the firm ground 2b drilled, and the fixing tool 14 is attached to the fixing unit 4c and temporarily fixed. In this state, the grout 13 is filled from the top to the height of the solid ground 2b from the bottom in the tendon insertion hole 8 of the drilling hole, and the filled grout 13 is hardened and anchored as the fixed end of the PC cable 12 The portion 3 is formed, and the lower end of the PC cable 12 is fixed to the ground 2 b through the PC connecting portion 5 at the upper portion thereof.

  As the fifth step, as shown in FIG. 15, the PC cable 12 is tension-fixed by the fixing tool 14 in the fixing portion 4c of the uppermost fixing PC plate 4b, and the stacked PC plate 4a and fixing are stacked. The PC plate 4b is crimped and integrated to be integrated, and integrally formed with the anchor fixing portion 3 via the PC connecting portion 5 to form a temporary PC wall portion 4.

As the sixth step, as shown in FIG. 16, after that, grout 13 is filled in the holes of PC connecting part 5 and PC wall part 4 from the top, and it is filled back with concaves 9 with gravel, crushed stone, etc. 11 is formed, and gravel, crushed stone, backfill earth and sand, paving concrete and the like are applied to the land side of the PC wall 4 to form the quay or revetment structure 1.
In the horizontal direction (the wall extension direction of the quay), although illustration is omitted, after the adjacent perforated PC plate 4a is constructed in the same procedure as above, a transverse fastening cable is inserted finally and tensioned and fixed. The perforated PC plate 4a is integrated to form a stronger quay or revetment.

Furthermore, when constructing the PC wall portion 4, a second construction method of constructing the quay or revetment structure 1 using the unbonded strand (PC steel strand wire) shown in FIG. 5 as a PC cable will be described with reference to FIG. This will be described with reference to FIG. Note that, since the first to third steps in the first construction method described above are the same, illustration and description will be omitted.
After completion of the first to third steps, that is, the tendon insertion holes 8 are formed in the depressions 9 of the ground 2, a plurality of perforated PC plates 4a are stacked on the mortar base 10, and the PC plate for fixing is formed on the top. After the installation of 4b, the fourth step is performed.

  In the fourth step, as shown in FIG. 17, a single unbonded PC steel strand is used as a tendon (PC cable) 12. Then, as shown in FIG. 6, the tendon (PC cable) 12 disposed in the anchor fixing portion 3 cuts off the PE coating to expose the strand 36 of PC steel. Also in this case, the continuous material (PC cable) 12 is used without providing the intermediate connector. The tendon (PC cable) 12 is inserted from the uppermost fixing PC plate 4b to the bottom of the tendon insertion hole 8 of the drilled hole and temporarily fixed by the fixing tool 14 at the fixing unit 4c.

  In the fifth step, as shown in FIG. 18, after the tendon (PC cable) 12 is inserted, the grant 13 is filled from the anchor fixing portion 3 to the uppermost portion of the PC wall 4 and the grout 13 is cured. The anchor fixing portion 3 is formed, and grout filling of the PC connecting portion 5 and the PC wall portion 4 is completed. The filling process (construction) of the grant 13 does not need to be divided into two steps and can be performed only once, as compared to the case of using a PC steel stranded wire 36 to which the PE coating is not applied.

In the sixth step, as shown in FIG. 19, thereafter, the tension member (PC cable) 12 is tension-fixed by the fixing tool 14 in the fixing portion 4c of the uppermost fixing PC plate 4b, and the holes are stacked. The open PC plate 4 a and the fixing PC plate 4 b are pressure-bonded and integrated, and are integrally formed with the anchor fixing unit 3 via the PC connecting unit 5 to form the PC wall 4.
The quay or revetment structure 1 according to the second embodiment and the third embodiment can be constructed in the same manner as the embodiment of the first construction method, and therefore the illustration and the description thereof will be omitted. .

  The quay or revetment structure according to the present invention and the construction method thereof are generally a quay or revetment structure formed by stacking a plurality of precast PC plates 4a on the ground 2, and a plurality of holes in the cross section of the PC plate 4a. A tendon 6 formed, at least two or more continuous holes 12 per PC plate penetrating through from the top to the bottom and being disposed to a predetermined depth of the ground 2 and being disposed in the ground 12, the lower end side is the anchor fixing portion 3 and the upper portion thereof is the PC connecting portion 5, and the anchor fixing portion 3 is formed on the lower end side of the tendon 12 by curing the filled grout 13; The lower end portion of the tendon 12 disposed through the hole 6 of the PC plate 4a stacked on the ground 2 via the portion 5 becomes a fixed end, and the uppermost end of the tendon 12 is at the top of the PC plate 4a. While pre-stressing is applied to the PC plate 4a which is tension-fixed and stacked on the ground, the PC plates are integrally joined by PC pressure bonding, and the PC plate is perforated. By using this method, it is possible to reduce the weight of members at the time of transportation and construction, and at the same time, it is possible to reduce the cost of construction. There is no need to provide a dedicated penetration hole or sheath for the tension material, and the continuous tension material 12 can be arranged from the top to a predetermined depth of the ground 2 without using any intermediate joint coupler etc. The construction is easy and economical, and the PC plates are crimped together to form a strong aseismic structure, which is not only much stronger than the conventional rebar joint structure, but also of the conventional concrete block At the base Since it becomes unnecessary to provide a discrete foundation or pile foundation, it can be widely applied or utilized in a wide variety of quay or seawall construction.

1 quay or revetment structure 2 ground 2a soft ground 2b solid ground 3 anchor fixing section 4 PC wall section 4a PC version 4b PC version for fixing 4c, 31 fixing section 5 PC connecting section 6 hole 7, 28, 30 sheath 8, 8a , 32 tendon insertion hole 9 recess 10 mortar base 11 base mound 12, 27 tendon (vertical tightening cable)
13, 13a, 33 Grout 14, 34 Anchoring device 15 PC crimping joint surface 16 Primary cable 17 Tendon (lateral tightening cable)
18 backfill stone 19 back embedded soil 20 paving concrete 21 resin coating 22 core line 23 side line 24 PE coated (PC steel with coated wire = tendon 12)
25 Rust-proof filler 26 Longitudinal rib 29 Diaphragm cable 35 Protective tube 36 Painted PC steel strand wire (or unpainted PC steel strand wire)

Claims (2)

A quay or revetment structure formed by stacking a lightweight PC plate (JIS A6511 equivalent) with a plurality of holes formed in cross section on the ground,
A plurality of tendon insertion holes drilled to a required depth are provided in the ground where the perforated PC plate is stacked,
The tendon continuous with at least a portion of the plurality of holes per perforated PC plate penetrates from the top to the bottom, and the lower end of the tendon is disposed to the bottom of the tendon insertion hole ; It is fixed in the ground by hardening of the grout filled in the tendon insertion hole ,
A fixing PC plate provided with a sheath for tension material insertion and a fixing portion is installed at the top of the stacked perforated PC plates, and an upper end portion of the tension material penetrates the sheath to form a fixing PC plate The prestress is applied to the perforated PC plate and the uppermost fixing PC plate that are tensioned and fixed in the fixing section and stacked on the ground, and the perforated PC plates and the fixing PC plates are pressure-bonded to each other. A quay or revetment structure characterized by being integrated. A method of constructing a quay or revetment formed by stacking a lightened perforated PC plate (JIS A6511 equivalent product) having a plurality of holes formed in cross section on the ground,
A plurality of tendon insertion holes drilled to a required depth are provided on the ground at the position where the perforated PC plate is stacked,
A holed PC plate is stacked and disposed thereon, and a fixing portion for fixing tool installation is provided at the top, and at least a part of the holes of the holed PC plate is inserted into the hole from the bottom to the bottom of the fixing portion. A fixing PC plate provided with a sheath according to the position of the hole is provided.
A PC cable consisting of a plurality of PC steel strands is used as the tendon, but it is continuous without using an intermediate connector, and is inserted from the uppermost fixing PC plate to the bottom of the tendon insertion hole drilled in the ground. And
The fixing tool is attached to the fixing unit to be temporarily fixed , grout is filled in the tendon insertion hole and hardened, and the lower end portion of the tendon is fixed to the ground, and then the tensing is performed in the fixing unit. uppermost end of the timber is nervous fixed by the fixing unit through the fixing PC version of the sheath, as well as imparting perforated PC version and prestress fixing PC version of the top piled, PC version each other and A quay or revetment construction method characterized by press-joining and unifying PC plates for fixing .

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