CN105908705A - Prefabricated pretensioned prestressed underground continuous wall and construction method thereof - Google Patents
Prefabricated pretensioned prestressed underground continuous wall and construction method thereof Download PDFInfo
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- CN105908705A CN105908705A CN201610458755.5A CN201610458755A CN105908705A CN 105908705 A CN105908705 A CN 105908705A CN 201610458755 A CN201610458755 A CN 201610458755A CN 105908705 A CN105908705 A CN 105908705A
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- 238000010276 construction Methods 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 230000002787 reinforcement Effects 0.000 claims abstract description 28
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 210000003205 muscle Anatomy 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 5
- 230000001737 promoting effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a prefabricated pretensioned prestressed underground continuous wall and a construction method thereof. A pretensioned reinforcement is arranged in an underground continuous wall component by full length but not tensioned by full length; and prestress is only applied in a higher tension area, so that the underground continuous wall serving as an envelope enclosure facilitates to exert an advantageous prestress effect under complex support exchange working conditions of a support and a basement floor. Meanwhile, the prefabricated underground continuous wall component adopted by the prefabricated pretensioned prestressed underground continuous wall is assembled in situ, so that the labor cost is greatly reduced while materials are saved, the better construction quality and speed are obtained with lower cost, such advantages as economy, simplicity and durability are achieved, and the application value and the popularization value are higher. The pretensioned prestress application can adopt a straight pulling mode, so that holes can be formed in the section of the underground continuous wall component to save the materials. In sum, the prefabricated pretensioned prestressed underground continuous wall has the advantages of high bearing capacity, high rigidity, high cracking resistance and low steel consumption and concrete consumption.
Description
Technical field
The present invention relates to a kind of bearing capacity height, rigidity is big, anti-crack ability is strong and steel using amount, and amount of concrete is all
Few Prefabricated pre-tensioned prestressed underground continuous wall and construction method thereof, be particularly well-suited to coercion underground continuous wall and make
Process for stretch-draw when foundation pit enclosure and outer wall of basement.
Background technology
There is more problem in conventional diaphram wall (hereinafter referred to as ground-connecting-wall), the most easily cause metope without
Rule infiltration, the flatness of metope is difficult to control to, and easily seeping water in two width ground-connecting-wall joints, it is impossible to directly makees
For outer wall of basement, engineering cost is more high.Comparatively speaking, prefabricated prestressed underground continuous wall then exists
Following advantage:
(1) body of wall prefabrication, surface is the most smooth, it is not necessary to does inwall again and can serve as basement
Exterior wall, i.e. adds construction area, decreases cost；
(2) prestressed setting adds wall stiffness, can reduce the quantity of internal support of foundation pit, thus reach
To cost-effective, the purpose of saving duration；
(3) hollow wall can be made, reduce concrete amount and steel using amount；
(4) reduce the deflection that body of wall is the most total, be conducive to protecting surrounding；
(5) wallboard makes outside the venue, is not take up the construction period；
(6) green energy conservation, reduces sound pollution and light pollution that construction produces.
Precast prestressed ground-connecting-wall has unexistent a lot of advantages of conventional ground-connecting-wall, and meets following green and execute
The developing direction of work.
Summary of the invention
In order to solve the problem that existing ground-connecting-wall exists, it is an object of the invention to provide a kind of Prefabricated pre-tensioned and in advance should
Power diaphram wall and construction method thereof, to improve the bearing capacity of ground-connecting-wall, rigidity and cracking resistance, and
Effectively reduce the reinforcing bar amount of ground-connecting-wall, amount of concrete, thus reduce the difficulty of ground-connecting-wall reinforcing bar cage hoisting
Degree and risk, and improve efficiency of construction, reduction of erection time, ensure that quality.
To achieve these goals, the present invention provides a kind of Prefabricated pre-tensioned prestressed underground continuous wall, by some
Prefabricated pre-tensioned prestressed underground continuous wall component Assembling forms, under described Prefabricated pre-tensioned prestressed ground continuously
Wall member includes: body of wall and be positioned at some pretensioned bars of body of wall and some service sleeves, described
Prefabricated pre-tensioned prestressed underground continuous wall component is along the height side of Prefabricated pre-tensioned prestressed underground continuous wall component
To being divided into: pulling force large area and be positioned at that two pulling force of pulling force large area both sides are less or compressive region
Territory, described some pretensioned bars are distributed in pre-along the longitudinal direction of Prefabricated pre-tensioned prestressed underground continuous wall component
The side of pre-tensioned prestressing diaphram wall component processed, described some pretensioned bars in advance should along Prefabricated pre-tensioned
The short transverse total length of power diaphram wall component is arranged, it is right that the two ends of described pretensioned bar are arranged in respectively
In the described service sleeve answered, the pulling force at the length of described service sleeve and service sleeve place is less or pressurized
Region is identical along the length of the short transverse of Prefabricated pre-tensioned prestressed underground continuous wall component, described pre-stretch-draw
The part being only located at pulling force large area on reinforcing bar carries out prestressed stretch-draw.
Preferably, in above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, also include some in described body of wall
Regular reinforcement, described some regular reinforcements are uniform along the longitudinal direction of Prefabricated pre-tensioned prestressed underground continuous wall component
In the inside and outside both sides of Prefabricated pre-tensioned prestressed underground continuous wall component, and described some pretensioned bars are positioned at
The inner side of described some regular reinforcements.
Preferably, in above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, described some pretensioned bars with
Described some regular reinforcements shift to install, and arrange some rectangles between described regular reinforcement and described service sleeve
Stone.
Preferably, in above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, near outward on described service sleeve
The open at one end of side, other end steel disc blocks, and offers one on steel disc and be intended for a pretensioned bar
The aperture passed.
Preferably, in above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, described Prefabricated pre-tensioned prestressed ground
If the middle part of lower diaphragm wall component is along the uniform dry hole of longitudinal direction of Prefabricated pre-tensioned prestressed underground continuous wall component
Hole.
Preferably, in above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, described pretensioned bar is by pre-
Stress tension facility carry out stretch-draw, and described prestressed stretch-draw facility include hoist engine and fixing pretensioned bar
Anchorage used or fixture, anchorage or fixture are close in service sleeve at steel disc and carry out pretensioned bar admittedly
Fixed..
Preferably, in above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, described pretensioned bar uses straight
Pull-type prestressed stretch-draw mode stretch-draw.
The invention also discloses the construction method of a kind of Prefabricated pre-tensioned prestressed underground continuous wall as above,
Comprise the steps:
Step one, before pretensioned bar Shi Hanzhang, the steel reinforcement cage being made up of regular reinforcement is kept flat
On dedicated site and use template Zhi Haomo, and pretensioned bar and service sleeve are fixed on steel reinforcement cage, institute
Stating service sleeve and be arranged at that ground-connecting-wall pulling force is less or pressurized zone, service sleeve open at one end, the other end is used
Steel disc blocks, and opens one on steel disc and be only sufficient to the aperture that pretensioned bar passes；
Step 2, pretensioned bar in sleeve pipe is carried out prestressed stretch-draw so that be positioned on pretensioned bar and draw
The part of power large area has prestressing force, pretensioned bar is positioned at pulling force is less or the part of pressurized zone
There is no prestressing force；
Step 3, after pretensioned bar stretch-draw completes toward casting concrete in template；
Step 4, treat that concrete strength reaches requirement after, remove prestressed stretch-draw facility, take out pre-buried set
Pipe is with recycling；
After step 5, service sleeve take out, then fill concrete in the hole arrange service sleeve, formed pre-
Pre-tensioned prestressing diaphram wall component processed；
Step 6, multiple Prefabricated pre-tensioned prestressed underground continuous wall component conveyings of making above are existing to construction
Field also lifts, and forms Prefabricated pre-tensioned prestressed underground continuous wall.
Preferably, in the construction method of above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, described step one
Before, need to first calculate the position of pulling force large area.
Preferably, in the construction method of above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, in step 2,
The open at one end in close outside on described service sleeve, other end steel disc blocks, and offers on steel disc
One is intended for the aperture that a pretensioned bar passes, and described pretensioned bar is carried out by prestressed stretch-draw facility
Stretch-draw, described prestressed stretch-draw facility include the anchorage used by hoist engine and fixing pretensioned bar or folder
Tool, anchorage or fixture are close in service sleeve at steel disc and are fixed pretensioned bar.
Compared with prior art, beneficial effects of the present invention is as follows:
One, the present invention provide Prefabricated pre-tensioned prestressed underground continuous wall and construction method, pretensioned bar
In ground-connecting-wall component, total length is arranged but non-total length stretch-draw, only at pulling force large area Shi Hanzhang, favorably
Play more favourable under the complicated support replacement operating mode supporting basement floor in the ground-connecting-wall as building enclosure
Prestressing force effect；The prefabricated ground-connecting-wall component Assembling that Prefabricated pre-tensioned prestressing force ground-connecting-wall uses, at joint
Also cost of labor it is greatly saved, it is possible to obtain more preferable construction quality with less expensive cost while material saving
And speed, there is the superioritys such as economy, Simple durable, there is good use value and promotional value.
Two, the present invention provide Prefabricated pre-tensioned prestressed underground continuous wall and construction method in, pre-stretch-draw steel
Muscle uses Straight pull prestressed stretch-draw mode stretch-draw, therefore, it is possible to by between pretensioned bar and concrete
Cohesive force carrying institute Shi Hanzhang, thus reach to reduce the effect of amount of deflection control critical eigenvalue.
Three, the present invention provide Prefabricated pre-tensioned prestressed underground continuous wall and construction method in, described body of wall
Owing to using pre-tensioning system vertical pulling i.e. Straight pull prestressed stretch-draw mode to arrange pretensioned bar, and use prefabricated
Pre-tensioned prestressing diaphram wall component, therefore can be at described Prefabricated pre-tensioned prestressed underground continuous wall component
Middle part along the uniform some holes of longitudinal direction of Prefabricated pre-tensioned prestressed underground continuous wall component, i.e. at ground-connecting-wall
Hole is set on the cross section of component, thus reduces the weight of ground-connecting-wall, facilitate transport and the lifting of ground-connecting-wall.
Accompanying drawing explanation
Fig. 1 is the plan view from above of the Prefabricated pre-tensioned prestressed underground continuous wall component of one embodiment of the invention.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is the B-B profile of Fig. 1.
Fig. 4 is sleeve pipe detail drawing.
Fig. 5 is steel disc detail drawing.
In figure: 1, regular reinforcement；2, hole；3, body of wall；4, pretensioned bar；5, service sleeve；
6, pulling force large area；7, pulling force is less or pressurized zone；8, steel disc；9, aperture；10, weld seam；
11, rectangle stone.
Detailed description of the invention
Prefabricated pre-tensioned prestressed underground continuous wall and construction method thereof to the present invention enter one below in conjunction with the accompanying drawings
Step explanation.
The mentality of designing of the Prefabricated pre-tensioned prestressing force ground-connecting-wall of the present invention is ground-connecting-wall to be applied pre-tensioning system in advance should
Power, at pulling force large area Shi Hanzhang, and pulling force is less or pressurized zone not Shi Hanzhang.At steel
Before muscle Shi Hanzhang, steel reinforcement cage lies on dedicated site and uses template Zhi Haomo, and pre-stretch-draw steel
Muscle and service sleeve are fixed on steel reinforcement cage, and service sleeve outer surface can smear lubriation material to facilitate taking-up.
Pretensioned bar between the service sleeve being oppositely arranged is carried out prestressed stretch-draw, treats that pretensioned bar stretch-draw is complete
Toward casting concrete in template after one-tenth.After prestressed stretch-draw completes, can be taken off service sleeve with recycling.
After service sleeve takes out, then fill concrete in the hole at service sleeve place.Material is thus formed prefabricated elder generation
Tension prestress diaphram wall component.These Prefabricated pre-tensioned prestressed underground continuous wall component conveyings to construction
Scene also lifts, and is the formation of Prefabricated pre-tensioned prestressed underground continuous wall.
Refer to Fig. 1 to Fig. 5, present embodiments provide a kind of Prefabricated pre-tensioned prestressed underground continuous wall (with
Lower abbreviation ground-connecting-wall), by some Prefabricated pre-tensioned prestressed underground continuous wall component (hereinafter referred to as subterranean wall structures
Part) Assembling forms, and described Prefabricated pre-tensioned prestressed underground continuous wall component includes: body of wall 3 and position
Some pretensioned bars 4 in body of wall 3 and some service sleeves 5, described Prefabricated pre-tensioned prestressed ground
Lower diaphragm wall component is divided into along the short transverse of Prefabricated pre-tensioned prestressed underground continuous wall component: pulling force relatively great Qu
Territory 6 and be positioned at that two pulling force of pulling force large area 6 both sides are less or pressurized zone 7, intervenes if described
Tension reinforcing steel bar 4 is distributed in Prefabricated pre-tensioned along the longitudinal direction of Prefabricated pre-tensioned prestressed underground continuous wall component and in advance should
The side (outside when usually ground-connecting-wall uses) of power diaphram wall component, if described intervention stretch-draw steel
Muscle 4 is arranged along the short transverse total length of Prefabricated pre-tensioned prestressed underground continuous wall component, described pre-stretch-draw steel
The two ends of muscle 4 are arranged in the described service sleeve 5 of correspondence respectively, and the length of described service sleeve 5 is with pre-
The pulling force at bushing burying 5 place is less or pressurized zone 7 is along Prefabricated pre-tensioned prestressed underground continuous wall component
The length of short transverse is identical, and the part that described pretensioned bar 4 is only located at pulling force large area 6 is carried out
Prestressed stretch-draw.In the present embodiment, pretensioned bar 4 total length in ground-connecting-wall component is arranged but non-total length is opened
Draw, only at pulling force large area 6 Shi Hanzhang, advantageous as the Prefabricated pre-tensioned prestressing force of building enclosure
Diaphram wall plays more favourable prestressing force effect under the complicated support replacement operating mode supporting basement floor；In advance
Pre-tensioned prestressing ground-connecting-wall processed uses ground-connecting-wall component Assembling, it is possible to while saving material,
Be greatly saved cost of labor, thus obtain more preferable construction quality and speed with less expensive cost, have through
Ji, the superiority such as Simple durable, there is good use value and promotional value.
Preferably, in the Prefabricated pre-tensioned prestressed underground continuous wall of the present embodiment, described body of wall 3 also includes
Some regular reinforcements 1, described some regular reinforcements 1 are along Prefabricated pre-tensioned prestressed underground continuous wall component
Longitudinally it is distributed in the inside and outside both sides of Prefabricated pre-tensioned prestressed underground continuous wall component, and if described intervention stretch-draw
Reinforcing bar 4 is positioned at the inner side of described some regular reinforcements 1.In order to improve Prefabricated pre-tensioned prestressed underground continuous wall
The intensity of component, thus improve the intensity of whole Prefabricated pre-tensioned prestressed underground continuous wall, it is preferred that at this
In the Prefabricated pre-tensioned prestressed underground continuous wall of embodiment, described some pretensioned bars 4 are some general with described
Logical reinforcing bar 1 shifts to install.
Owing to ground-connecting-wall component is during pouring construction, being horizontally disposed, pretensioned bar connects with being positioned at
The downside of wall member, in order to separate regular reinforcement with pretensioned bar, it is preferred that pre-at the present embodiment
In pre-tensioned prestressing diaphram wall processed, some rectangles are set between described regular reinforcement and described service sleeve
Stone 11.Support pretensioned bar by rectangle stone 11 and pretensioned bar separated in regular reinforcement,
In order to avoid affecting prestress application effect.
Preferably, in the Prefabricated pre-tensioned prestressed underground continuous wall of the present embodiment, described service sleeve 5
The upper open at one end near outside, other end steel disc 8 blocks, and offers one on steel disc 8 and be intended for
The aperture 9 that one pretensioned bar 4 passes.By being welded to connect between described steel disc 8 and service sleeve 5,
Thus between steel disc 8 and service sleeve 5, forming weld seam 10, described aperture 9 is than pretensioned bar 4 slightly
Slightly.By arranging the service sleeve 5 of constituted above, can be by described Prefabricated pre-tensioned prestressed underground continuous wall
It is bigger that component is divided into three i.e. pulling force in interval along the short transverse of Prefabricated pre-tensioned prestressed underground continuous wall component
Region 6 and be positioned at that two pulling force of pulling force large area 6 both sides are less or pressurized zone 7, such that it is able to
Only the part being positioned at pulling force large area 6 on described pretensioned bar 4 is carried out prestressed stretch-draw, be conducive to
Ground-connecting-wall as building enclosure plays more favourable pre-under the complicated support replacement operating mode supporting basement floor
Stress effect.
Preferably, in the Prefabricated pre-tensioned prestressed underground continuous wall of the present embodiment, described Prefabricated pre-tensioned in advance should
If the middle part of power diaphram wall component is uniform along the longitudinal direction of Prefabricated pre-tensioned prestressed underground continuous wall component
Dry hole hole 2.After using pre-tensioning system vertical pulling i.e. Straight pull prestressed stretch-draw mode stretch-draw due to described body of wall 3
Pretensioned bar 4, and use Prefabricated pre-tensioned prestressed underground continuous wall component, therefore, described prefabricated elder generation
The middle part of tension prestress diaphram wall component is along the longitudinal direction of Prefabricated pre-tensioned prestressed underground continuous wall component
Uniform some holes 2, i.e. arrange hole 2 on ground-connecting-wall member section such that it is able to reduce ground-connecting-wall structure
The weight of part, connects transport and the lifting of wall member easily.
Preferably, in the Prefabricated pre-tensioned prestressed underground continuous wall of the present embodiment, described pretensioned bar 4
Carrying out stretch-draw by prestressed stretch-draw facility, described prestressed stretch-draw facility include hoist engine and fix pre-
The anchorage used by reinforcing bar 4 or fixture (not shown), described anchorage or fixture is drawn to be close in service sleeve 5
At steel disc 9, pretensioned bar is fixed, thus realizes only bigger to being positioned at pulling force on pretensioned bar 4
The part Shi Hanzhang in region 6.Preferably, in above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall,
Also include that the interim fixing anchorage used or fixture, the interim fixing anchorage used or fixture can meet to pour
When its intensity reaches design load more than 75%, the bearing requirements loosening reinforcing bar is cut off after concrete.
Preferably, in the Prefabricated pre-tensioned prestressed underground continuous wall of the present embodiment, described pretensioned bar 4
Use Straight pull prestressed stretch-draw mode stretch-draw.
Please continue to refer to Fig. 1 to Fig. 5, the present embodiment also discloses a kind of Prefabricated pre-tensioned as above and in advance should
The construction method of power diaphram wall, comprises the steps:
Step one, before pretensioned bar 4 Shi Hanzhang, the steel reinforcement cage being made up of regular reinforcement 1
Lie against on dedicated site and use template Zhi Haomo, and pretensioned bar 4 and service sleeve 5 are fixed on reinforcing bar
On cage, described service sleeve 5 is arranged at that ground-connecting-wall pulling force is less or pressurized zone 7, service sleeve 5 one end
Opening wide, other end steel disc 8 blocks, and opens one on steel disc 8 and be only sufficient to what pretensioned bar 4 passed
Aperture 9.
Step 2, pretensioned bar 4 is carried out prestressed stretch-draw so that on pretensioned bar 4, be positioned at pulling force
The part of large area 6 has prestressing force, pretensioned bar 4 is positioned at pulling force is less or pressurized zone 7
Part there is no prestressing force, i.e. make the part being positioned between two corresponding service sleeves 5 on pretensioned bar 4
Having prestressing force, being positioned at 6 parts being positioned at service sleeve 5 does not has prestressing force.Due to pretensioned bar 4
In ground-connecting-wall component, total length is arranged but non-total length stretch-draw, only at pulling force large area 6 Shi Hanzhang, has
It is beneficial to the ground-connecting-wall as building enclosure and plays more favourable under the complicated support replacement operating mode supporting basement floor
Prestressing force effect.
Step 3, after pretensioned bar 4 stretch-draw completes toward casting concrete in template.
Step 4, treat that concrete strength reaches requirement after, remove prestressed stretch-draw facility, take out pre-buried set
Pipe 5 is with recycling.
After step 5, service sleeve 5 take out, then fill concrete, shape in the hole arrange service sleeve 5
Become Prefabricated pre-tensioned prestressed underground continuous wall component.
Step 6, multiple Prefabricated pre-tensioned prestressed underground continuous wall component conveyings of making above are existing to construction
Field also lifts, and forms Prefabricated pre-tensioned prestressed underground continuous wall.Due to Prefabricated pre-tensioned prestressing force ground-connecting-wall
Use the prefabricated field-installed mode of ground-connecting-wall component, while saving material, be also greatly saved artificial one-tenth
This, it is possible to obtain more preferable construction quality and speed with less expensive cost, there is economy, Simple durable etc.
Superiority, has good use value and promotional value.
Preferably, in the construction method of above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, described step one
Before, need to first calculate the position of pulling force large area 6.
Preferably, in the construction method of above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, described pre-buried
Near the open at one end in outside on sleeve pipe, other end steel disc blocks, and offers one on steel disc and be intended for
The aperture that one pretensioned bar passes, described pretensioned bar carries out stretch-draw, institute by prestressed stretch-draw facility
State prestressed stretch-draw facility and include the anchorage used by hoist engine and fixing pretensioned bar or fixture, anchorage or
Fixture is close in service sleeve at steel disc and is fixed pretensioned bar.
Preferably, in the construction method of above-mentioned Prefabricated pre-tensioned prestressed underground continuous wall, in step 2,
The method using batch stretch-draw, to improve ground-connecting-wall structure manufacture efficiency.
In sum, beneficial effects of the present invention is as follows:
One, the present invention provide Prefabricated pre-tensioned prestressed underground continuous wall and construction method, pretensioned bar
In ground-connecting-wall component, total length is arranged but non-total length stretch-draw, only at pulling force large area Shi Hanzhang, favorably
Play more favourable under the complicated support replacement operating mode supporting basement floor in the ground-connecting-wall as building enclosure
Prestressing force effect；The prefabricated ground-connecting-wall component Assembling that Prefabricated pre-tensioned prestressing force ground-connecting-wall uses, at joint
Also cost of labor it is greatly saved, it is possible to obtain more preferable construction quality with less expensive cost while material saving
And speed, there is the superioritys such as economy, Simple durable, there is good use value and promotional value.
Two, the present invention provide Prefabricated pre-tensioned prestressed underground continuous wall and construction method in, pre-stretch-draw steel
Muscle uses Straight pull prestressed stretch-draw mode stretch-draw, therefore, it is possible to by between pretensioned bar and concrete
Cohesive force carrying institute Shi Hanzhang, thus reach to reduce the effect of amount of deflection control critical eigenvalue.
Three, the present invention provide Prefabricated pre-tensioned prestressed underground continuous wall and construction method in, described body of wall
Owing to using pre-tensioning system vertical pulling i.e. Straight pull prestressed stretch-draw mode to arrange pretensioned bar, and use prefabricated
Pre-tensioned prestressing diaphram wall component, the middle part of the most described Prefabricated pre-tensioned prestressed underground continuous wall component
The uniform some holes of longitudinal direction along Prefabricated pre-tensioned prestressed underground continuous wall component, i.e. at ground-connecting-wall component
Hole is set on cross section, thus reduces the weight of ground-connecting-wall, facilitate transport and the lifting of ground-connecting-wall.
Claims (10)
1. a Prefabricated pre-tensioned prestressed underground continuous wall, by some Prefabricated pre-tensioned prestressed underground continuous walls
Component Assembling forms, it is characterised in that described Prefabricated pre-tensioned prestressed underground continuous wall component includes:
Body of wall and be positioned at some pretensioned bars of body of wall and some service sleeves, described Prefabricated pre-tensioned in advance should
Power diaphram wall component is divided into along the short transverse of Prefabricated pre-tensioned prestressed underground continuous wall component: pulling force is relatively
Big region and be positioned at that two pulling force of pulling force large area both sides are less or pressurized zone, intervenes if described
Reinforcing bar is drawn to be distributed in Prefabricated pre-tensioned prestressed ground along the longitudinal direction of Prefabricated pre-tensioned prestressed underground continuous wall component
The side of lower diaphragm wall component, described some pretensioned bars are along Prefabricated pre-tensioned prestressed underground continuous wall structure
The short transverse total length of part is arranged, the two ends of described pretensioned bar are arranged in the described pre-buried set of correspondence respectively
Guan Zhong, the length of described service sleeve is less with the pulling force at service sleeve place or pressurized zone is along prefabricated elder generation
The length of the short transverse of tension prestress diaphram wall component is identical, described pretensioned bar is only located at and draws
The part of power large area carries out prestressed stretch-draw.
2. Prefabricated pre-tensioned prestressed underground continuous wall as claimed in claim 1, it is characterised in that described
Also including some regular reinforcements in body of wall, described some regular reinforcements are along continuous under Prefabricated pre-tensioned prestressed ground
The longitudinal direction of wall member is distributed in the inside and outside both sides of Prefabricated pre-tensioned prestressed underground continuous wall component, and if described
Intervene tension reinforcing steel bar and be positioned at the inner side of described some regular reinforcements.
3. Prefabricated pre-tensioned prestressed underground continuous wall as claimed in claim 2, it is characterised in that described
Some pretensioned bars shift to install with described some regular reinforcements, described regular reinforcement and described service sleeve
Between some rectangle stones are set.
4. Prefabricated pre-tensioned prestressed underground continuous wall as claimed in claim 1, it is characterised in that described
The open at one end in close outside on service sleeve, other end steel disc blocks, and offers one on steel disc
It is intended for the aperture that a pretensioned bar passes.
5. Prefabricated pre-tensioned prestressed underground continuous wall as claimed in claim 1, it is characterised in that described
The middle part of Prefabricated pre-tensioned prestressed underground continuous wall component is along Prefabricated pre-tensioned prestressed underground continuous wall component
The uniform some holes of longitudinal direction.
6. Prefabricated pre-tensioned prestressed underground continuous wall as claimed in claim 4, it is characterised in that described
Pretensioned bar carries out stretch-draw by prestressed stretch-draw facility, described prestressed stretch-draw facility include hoist engine with
And anchorage used by fixing pretensioned bar or fixture, anchorage or fixture are close at steel disc pair in service sleeve
Pretensioned bar is fixed.
7. Prefabricated pre-tensioned prestressed underground continuous wall as claimed in claim 1, it is characterised in that described
Pretensioned bar uses Straight pull prestressed stretch-draw mode stretch-draw.
8. the Prefabricated pre-tensioned prestressed underground continuous wall as described in any one in claim 1-7
Construction method, it is characterised in that: comprise the steps:
Step one, before pretensioned bar Shi Hanzhang, the steel reinforcement cage being made up of regular reinforcement is kept flat
On dedicated site and use template Zhi Haomo, and pretensioned bar and service sleeve are fixed on steel reinforcement cage, institute
Stating service sleeve and be arranged at that ground-connecting-wall pulling force is less or pressurized zone, service sleeve open at one end, the other end is used
Steel disc blocks, and opens one on steel disc and be only sufficient to the aperture that pretensioned bar passes；
Step 2, pretensioned bar in sleeve pipe is carried out prestressed stretch-draw so that be positioned on pretensioned bar and draw
The part of power large area has prestressing force, pretensioned bar is positioned at pulling force is less or the part of pressurized zone
There is no prestressing force；
Step 3, after pretensioned bar stretch-draw completes toward casting concrete in template；
Step 4, treat that concrete strength reaches requirement after, remove prestressed stretch-draw facility, take out pre-buried set
Pipe is with recycling；
After step 5, service sleeve take out, then fill concrete in the hole arrange service sleeve, formed pre-
Pre-tensioned prestressing diaphram wall component processed；
Step 6, multiple Prefabricated pre-tensioned prestressed underground continuous wall component conveyings of making above are existing to construction
Field also lifts, and forms Prefabricated pre-tensioned prestressed underground continuous wall.
9. the construction method of Prefabricated pre-tensioned prestressed underground continuous wall as claimed in claim 8, its feature
It is, before described step one, need to first calculate the position of pulling force large area.
10. the construction method of Prefabricated pre-tensioned prestressed underground continuous wall as claimed in claim 8, its feature
It is, in step 2, the open at one end in close outside on described service sleeve, other end steel disc blocks,
And offering one on steel disc and be intended for the aperture that a pretensioned bar passes, described pretensioned bar is by pre-
Stress tension facility carry out stretch-draw, and described prestressed stretch-draw facility include hoist engine and fixing pretensioned bar
Anchorage used or fixture, anchorage or fixture are close in service sleeve at steel disc and carry out pretensioned bar admittedly
Fixed.
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| CN105908705B (en) | 2024-09-20 |
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