CN118563754A - Static pile sinking construction method for combined pile of cap-shaped steel sheet pile and H-shaped steel - Google Patents
Static pile sinking construction method for combined pile of cap-shaped steel sheet pile and H-shaped steel Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 227
- 239000010959 steel Substances 0.000 title claims abstract description 227
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 230000003068 static effect Effects 0.000 title claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000013461 design Methods 0.000 claims description 12
- 238000010008 shearing Methods 0.000 claims description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
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- 238000005452 bending Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 238000000605 extraction Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
- E02D5/08—Locking forms; Edge joints; Pile crossings; Branch pieces
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
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Abstract
The invention provides a static pile sinking construction method of a combined pile of a hat-shaped steel sheet pile and H-shaped steel, which comprises the following steps of: (1) pressing a first pile until the pile top is exposed out of the ground; (2) leading holes at the second pile position by using pile driving rods; (3) pressing in the second pile until the pile top is exposed out of the ground; (4) Pressing the first pile to a preset depth by adopting a twice pressing method; (5) leading holes at a third pile position by using a pile driver; (6) pressing in a third pile until the pile top is exposed out of the ground; (7) Pressing the second pile to a preset depth by adopting a twice pressing method; (8) repeating steps (5) - (7) until completion. According to the invention, the hat-shaped steel sheet pile and the H-shaped steel are combined, so that the bending rigidity of the section can be greatly improved, the influence of a static pile sinking construction method on the surrounding environment is small, the combined steel sheet pile can be repeatedly used for many times, the whole construction process is environment-friendly, the resources are saved, and the economical efficiency is good.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a static pile sinking construction method of a combined pile of a hat-shaped steel sheet pile and H-shaped steel.
Background
The steel sheet pile is used as a reusable green environment-friendly building material, has the advantages of high strength, light weight, stable material, reliable quality, good durability, good weather resistance, integrated soil and water retaining, convenient and pollution-free construction and the like, and is widely applied to the engineering of wharf cofferdams, municipal pipe galleries, building foundation pits and the like. The single steel sheet pile is U-shaped, Z-shaped or straight web-shaped, and has small section rigidity, so that when the single steel sheet pile is used for urban deep foundation pit engineering with strict deformation requirements, a multi-layer anchor supporting structure is required to be additionally arranged, and the construction difficulty of subsequent engineering in the pit is further increased, so that the advantages of rapidness and high efficiency are not exerted; in order to increase the section rigidity, engineering technicians at home and abroad try to combine the steel sheet piles with the folded steel sheets, the H-shaped steel, the steel pipes and the like to form combined piles with various sections such as CAZ box type, HZ+AZ type, steel sheet piles and steel pipe piles and the like for retaining water.
The combined pile belongs to simple superposition of steel sheet piles and H-shaped steel, is not integrated, cannot fully exert the rigidity advantage of a combined section, is unfavorable for controlling deformation, and can not be applied to urban areas with complex surrounding environments due to noise or vibration in the existing mature vibration or hammering pile sinking process, so that the cap-shaped steel sheet pile and H-shaped steel combined pile static pile sinking process which is more environment-friendly and efficient is necessarily the key direction of steel sheet pile supporting technology development.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a static pile sinking construction method of the combined pile of the hat-shaped steel sheet pile and the H-shaped steel, which is noise-free and pollution-free, not only plays a role in water stopping of the hot rolling locking notch of the hat-shaped pile, but also greatly improves the bending stiffness of the section by adding the H-shaped steel, and has the advantages of quick and convenient construction, quick effect, extraction and recovery after the construction of the underground structure is finished, and is environment-friendly in whole process and resource-saving.
The technical scheme provided by the invention is as follows: a static pile sinking construction method for a combined pile of a hat-shaped steel sheet pile and H-shaped steel comprises the following steps:
S1: selecting proper hat-shaped steel sheet piles and H-shaped steel types according to project stratum conditions and surrounding environments;
S2: preparing construction, leveling a site, measuring and paying off, positioning a locking line at the outer edge of the cap-shaped steel sheet pile and an outer edge line of H-shaped steel, and determining a pile-down point;
S3: a guide frame is arranged along the advancing direction of the pile sinking, a clamping plate is arranged at the locking opening of the hat-shaped steel sheet pile in the advancing direction of the pile sinking, the locking opening at the front side of the hat-shaped steel sheet pile is locked, and both sides of the locking opening hasp are filled with sizing blocks and wood tenons;
S4: hanging a first combined pile, positioning and straightening, and adopting a static pile press to press the pile until the top of the cap-shaped steel plate pile is just flush with the ground, wherein the H-shaped steel is exposed out of the ground;
S5: hanging a pile-feeding rod to the next pile position, after straightening, connecting a locking mouth of the cap-shaped steel sheet pile, pressing a hole of the pile-feeding rod, and pulling out the hole, wherein the depth of the hole is +0.1-0.2m from the whole section of the pile-feeding rod;
s6: hanging a second combined pile, pressing the second combined pile into the H-shaped steel protruding section at the lower end, locking the cap-shaped steel sheet pile, and pressing the pile until the top of the cap-shaped steel sheet pile is level with the ground;
S7: hanging a pile driving rod, installing a pin to connect the pile driving rod with the pile top of the first combined pile, and pressing the pile to a preset depth;
s8: the equipment is moved to a third pile position, a pile-feeding rod is hung in, after straightening, a locking port of the cap-shaped steel sheet pile is connected, the pile-feeding rod is pressed into a guiding hole of the pile-feeding rod and then pulled out, and the depth of the guiding hole is +0.1-0.2m of the height difference between the lower end surfaces of the cap-shaped steel sheet pile and the H-shaped steel;
S9: hanging a third combined pile, pressing the third combined pile into the H-shaped steel protruding section at the lower end, locking the cap-shaped steel sheet pile, and pressing the pile until the top of the cap-shaped steel sheet pile is level with the ground;
s10: hanging a pile driving rod, installing a pin to connect the pile driving rod with the pile top of the second combined pile, and pressing the pile to a preset depth;
S11: and repeating the steps S8-S10 to perform subsequent pile position construction until finishing.
Further, the combined pile comprises a cap-shaped steel sheet pile and H-shaped steel, the H-shaped steel is arranged in parallel along the locking notch of the cap-shaped steel sheet pile and the splicing direction, the web plate of the cap-shaped steel sheet pile is clung to one side flange of the H-shaped steel, two rows of bolt connecting holes are formed in advance along the length direction on the contact surface of the web plate of the cap-shaped steel sheet pile, and the two rows of bolt connecting holes are tightly connected with the nuts through high-strength bolts to form a cap-shaped combined steel sheet pile structure.
Furthermore, the design value of the tensile and shearing resistance bearing capacity of the single high-strength bolt needs to meet the following relation:
High strength bolt friction type connection:
high-strength bolt bearing type connection:
Wherein: n t、Nv is the design value of the tensile force and the shearing force born by each bolt under the action of external force; the design value of the tensile and shearing bearing capacity of a single high-strength bolt is designed; The compressive bearing capacity design value of a single high-strength bolt is set; n f is the number of force transmission friction surfaces of a high-strength bolt; μ is the coefficient of slip resistance of the friction surface; p is the pretension of a high strength bolt.
Further, the pile top of the combined pile is buried below the ground, the upper end of the cap-shaped steel sheet pile is lower than 800-1000mm of the upper end face of the H-shaped steel, a reinforcing steel plate is fully welded on the inner flange side of a web plate at the higher part of the H-shaped steel, 4 pin connection holes are distributed on the reinforcing steel plate in a square mode, the cap-shaped steel sheet pile is ensured not to be connected with a crown beam, and the lower end of the cap-shaped steel sheet pile is higher than the lower end face of the H-shaped steel, so that a variable cross section is formed.
Further, the size of the reinforced steel plate is 350mm multiplied by 400mm, the thickness is 5-10mm, and the aperture of the pin connection hole is 70mm.
Further, the pile-delivering rod is formed by combining a cap-shaped steel sheet pile and H-shaped steel through high-strength bolt connection, the section model is the same as that of the combined pile, the length of the rod is larger than the burying depth of the top of the combined pile, the lower end of the cap-shaped steel sheet pile of the pile-delivering rod is lower than 800-1000mm of the lower end face of the H-shaped steel, and the height difference is consistent with the upper end of the combined pile.
Further, pile drivers are welded on the inner edge side of the web plate at the lower end of the H-shaped steel of the pile driver rod, the pile drivers are formed by symmetrically welding four steel plates, the size is 400mm multiplied by 500mm, the thickness is 5-10mm, 4 pin connection holes are distributed in a square manner on the pile drivers, the hole diameter is 70mm, the pile driver rod is connected with the combined pile through pins, and the pin diameter is smaller than the hole diameter of the pin connection holes.
Further, in the step S7, when the pile is pressed to a predetermined depth by using the pile driving rod, the pile is pressed twice, the pile driving pin is installed when the pile is pressed once, after the pile is smoothly pressed to the predetermined depth, the pile is pulled to a state that the pile top is exposed out of the ground by 0.5m, the pile driving pin is removed, the pile driving rod and the pile top are aligned, and the pile is pressed twice to the predetermined depth.
Furthermore, the hat-shaped steel sheet pile is a hot-rolled steel sheet pile with a hat-shaped section, asymmetric Larson locking openings are adopted, the hat-shaped steel sheet pile is arranged on two sides in the width direction, the hat-shaped steel sheet pile is connected into a whole through the hot-rolled locking openings after being formed into a wall, the specification is NS-SP-10H, NS-SP-25H, and further, the H-shaped steel is domestic hot-rolled wide flange H-shaped steel (HW), middle flange H-shaped steel (HM) and narrow flange H-shaped steel (HN).
Furthermore, when pile sinking, two theodolites are adopted to strictly control the precision in two directions, the horizontal position and the verticality of the combined pile are measured once every 1m, and when the deflection is too large and can not be adjusted by a drawing method, the pile sinking is lifted or the correction is carried out by adopting measures such as wedge-shaped steel sheet piles.
Furthermore, when the combined pile is applied to engineering with strict seepage prevention requirements, an expansion type water stopping material is arranged at a locking port of the cap type steel plate pile, and the concrete modes include smearing type, filling type and the like.
The invention has the beneficial effects that:
(1) According to the invention, the H-shaped steel and the cap-shaped steel sheet pile are combined and connected, so that the mechanical property of steel can be fully exerted, and the water stopping property of the Larson locking notch of the cap-shaped steel sheet pile can be exerted. The main stress parts of the cross section of the combined pile structure are distributed on two sides of a neutral axis, the neutral axis is not overlapped with a Larson locking notch, the locking notch is mutually locked after being stressed and does not generate bending and shearing, the whole stress form is reasonable, the deformation resistance is strong, and the influence on the surrounding environment is small.
(2) In the invention, the H-shaped steel and the hat-shaped steel sheet pile are connected through the high-strength bolts, compared with fillet welding connection, the H-shaped steel and the hat-shaped steel sheet pile are more convenient to recombine when being repeatedly used. When the H-shaped steel or the hat-shaped steel sheet pile cannot be corrected due to overlarge deformation caused by unknown obstacles in the pile sinking process, or the locking notch deformation caused by the fact that the perpendicularity does not meet the requirement in pile sinking cannot be reused, the H-shaped steel and the hat-shaped steel sheet pile can be disassembled, and then the H-shaped steel and the hat-shaped steel sheet piles of different types are recombined. Not only improves the utilization rate of materials and reduces the cost, but also avoids the problem of residual stress generated during fillet welding connection.
(3) The top and bottom of the hat-shaped steel sheet pile is shorter than the length of the H-shaped steel, and compared with the common combined pile with the uniform cross section, the hat-shaped steel sheet pile has certain advantages from the aspects of construction convenience and engineering economy.
(4) The combined pile static pile sinking construction method provided by the invention is suitable for pile tops and pile bodies with variable cross sections at different positions, and has wider field construction applicability compared with the traditional pile sinking construction methods of inserting and driving type, screen type and staggered type. Through the measures of pre-hole guiding, the buckling deformation caused by torsion due to uneven stress when pile sinking of the variable section is effectively prevented; the influence of underground hard barriers can be effectively avoided by pressing the pile to the preset depth through a twice pressing method, if the pile is directly pressed below the ground, the pile cannot be pulled out or pressed in if the pile is blocked.
(5) The combined pile is made of green environment-friendly materials, and has no pollution to underground water and underground environment; the static pile sinking process has no slurry and noise pollution; after the operation is completed, the soil can be completely removed and recovered, the ground barrier is not formed, the soil, the sand and the stone are not needed, cement is saved, and the resource is protected and saved;
(6) The combined pile can be repeatedly used in temporary projects such as deep foundation pits and the like, and compared with supporting modes such as concrete row piles and the like, the combined pile has low manufacturing cost; for long and narrow foundation pit engineering such as pipe gallery foundation pit, the turnover is quick, and the advantages are more obvious; if the construction period cost is considered, the method is more economical.
Drawings
FIG. 1 is a schematic diagram of a static pile sinking construction flow in the invention;
FIG. 2 is a schematic diagram of the overall structure of the hat-type steel sheet pile and H-type steel composite pile according to the invention;
FIG. 3 is a schematic view of a high strength bolting of a composite pile according to the present invention;
FIG. 4 is a sectional view of a hat type steel sheet pile + H type steel composite pile according to the present invention;
FIG. 5 is an elevation view of a hat type steel sheet pile + H type steel composite pile of the present invention;
FIG. 6 is a schematic view of a cap-type steel sheet pile locking connection according to the present invention;
FIG. 7 is a schematic view of a pile driver and end pile driver according to the present invention;
FIG. 8 is a schematic view of the connection of pile driving rod and composite pile according to the present invention;
In the figure: 1-H-shaped steel, 101-flange, 102-web, 2-hat-shaped steel sheet pile, 201-web, 202-locking notch, 3-bolt connecting hole, 4-high strength bolt, 5-nut, 6-crown beam, 7-reinforced steel plate, 8-pile driving rod, 801-pile driving device, 802-pin connecting hole and 9-pin.
Detailed Description
The invention is further described below with reference to the drawings and examples. Figures 1 to 8 are drawings of embodiments, drawn in a simplified manner, for the purpose of clearly and concisely illustrating embodiments of the present invention. The following technical solutions presented in the drawings are specific to embodiments of the present invention and are not intended to limit the scope of the claimed invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The combined pile of the hat-shaped steel sheet pile and the H-shaped steel provided in the embodiment comprises the hat-shaped steel sheet pile 2 and the H-shaped steel 1, wherein the H-shaped steel 1 is arranged in parallel along the splicing direction of the locking notch 202 of the hat-shaped steel sheet pile 2, the web 201 of the hat-shaped steel sheet pile 2 is tightly attached to one side flange 101 of the H-shaped steel 1, two rows of bolt connecting holes 3 are formed in advance along the length direction on the contact surface of the web 201, and the two rows of bolt connecting holes are tightly connected with the nut 5 through high-strength bolts 4 to form a hat-shaped combined steel sheet pile structure; the hat-shaped steel sheet pile 2 is a hot rolled steel sheet pile with a hat-shaped cross section produced by Japan iron manufacturing Co, adopts asymmetric Lasen locking openings 202, is arranged on two sides in the width direction, is integrated by the hot rolled locking openings 202 after being formed into a wall, has excellent water stopping performance, and has the common specification of NS-SP-10H, NS-SP-25H; the H-shaped steel 1 is formed by 3 domestic hot rolled wide flange H-shaped steel (HW), middle flange H-shaped steel (HM) and narrow flange H-shaped steel (HN); the pile top of the combined pile is buried below the ground, the upper end of the cap-shaped steel sheet pile 2 is 800-1000mm lower than the upper end face of the H-shaped steel 1, the inner flange side of the web 102 at the higher part of the H-shaped steel 1 is fully welded with a reinforced steel plate 7, the size is 350mm multiplied by 400mm, the thickness is 5-10mm, 4 pin connection holes 802 are distributed in a square manner on the reinforced steel plate 7, the aperture is 70mm, the cap-shaped steel sheet pile 2 is ensured not to be connected with the crown beam 6, and the construction and the dismantling of the crown beam 6 are facilitated; the lower end of the hat-shaped steel sheet pile 2 is higher than the lower end face of the H-shaped steel 1, so that a variable cross section is formed, and the economical efficiency is improved.
The high-strength connecting bolt 4 of the hat-shaped steel sheet pile and H-shaped steel combined pile provided in the embodiment is shown in fig. 3, and the design value of the tensile and shearing bearing capacity of the high-strength connecting bolt needs to meet the following relation:
High strength bolt friction type connection:
high-strength bolt bearing type connection:
Wherein: n t、Nv is the design value of the tensile force and the shearing force born by each bolt under the action of external force; the design value of the tensile and shearing bearing capacity of a single high-strength bolt is designed; The compressive bearing capacity design value of a single high-strength bolt is set; n f is the number of force transmission friction surfaces of a high-strength bolt; μ is the coefficient of slip resistance of the friction surface; p is the pretension of a high-strength bolt, and the coefficient 1.2 is a correction coefficient taking into account the reduction in compressive load capacity of the high-strength bolt due to the presence of an external tension.
The pile-delivering rod 8 of the hat-shaped steel sheet pile and H-shaped steel combined pile provided in the embodiment is formed by connecting and combining a hat-shaped steel sheet pile 2 and H-shaped steel 1 through a high-strength bolt 4, the section model is the same as that of the combined pile, the rod length is larger than the burying depth of the combined pile top, the lower end of the hat-shaped steel sheet pile 2 of the pile-delivering rod 8 is lower than the lower end face 800-1000mm of the H-shaped steel 1, and the height difference is consistent with the upper end of the combined pile; pile driver 801 is welded on the inner edge side of web 102 at the lower end of H-shaped steel 1 of the pile driver, the pile driver is formed by symmetrically welding four steel plates, the size is 400mm multiplied by 500mm, the thickness is 5-10mm, 4 pin connecting holes 802 are distributed in a square manner on the pile driver, the aperture is 70mm, the pile driver 8 is connected with a combined pile through pins 9, and the diameter of the pins 9 is smaller than the aperture of the connecting holes 802.
The invention is further described below with reference to specific embodiments, wherein the embodiments are long 12m composite pile supporting structures, the length of H-shaped steel 1 is 10m, the length of hat-shaped steel sheet piles 2 is 9m, the construction flow is shown in fig. 1, and the specific construction steps are as follows:
Step one: according to project stratum conditions and influence factors such as surrounding environment, designing a model 700 multiplied by 300 multiplied by 13 multiplied by 24 of a model NS-SP-10H, H steel sheet pile 2 and a model 1 of steel sheet pile 1;
step two: preparing construction, leveling a site, measuring and paying off, positioning a locking notch 202 line at the outer edge of the cap-shaped steel sheet pile 2 and an outer edge line of the H-shaped steel 1, and determining a lower pile point;
step three: arranging guide frames along the advancing direction of the pile sinking to improve the pile sinking precision, wherein the guide frames are divided into single-sided and double-sided arrangement forms on a plane, are divided into single-layer and double-layer forms on a space, and are composed of guide beams, surrounding purlin piles and the like, the distance between the surrounding purlin piles is 2.5-3.5m, and a 20-50mm gap is reserved between the guide beams and the combined piles; in order to prevent torsion and displacement in the construction process of the combined pile, a clamping plate can be arranged at the locking notch 202 in the advancing direction of the driven pile to lock the front locking notch 202 of the steel sheet pile, and two sides of the buckling part of the locking notch 202 are filled with sizing blocks and wood tenons.
Step four: hanging a first combined pile, positioning and straightening, and adopting a static pile press to press the pile until the top of the cap-shaped steel sheet pile 2 is just flush with the ground, wherein the H-shaped steel 1 is exposed out of the ground;
Step five: hanging the pile-delivering rod 8 to the next pile position, after straightening, connecting a cap-shaped steel sheet pile locking port 202, pressing the pile-delivering rod 8 into a hole, and pulling out the pile-delivering rod, wherein the depth of the hole is 0.1-0.2m from the total section of the pile-delivering rod 8;
step six: hanging a second combined pile, pressing the protruding section of the H-shaped steel 1 at the lower end, and pressing the pile until the top of the hat-shaped steel sheet pile 2 is level with the ground after the hat-shaped steel sheet pile is locked with the opening 202;
Step seven: hanging a pile driving rod 8, performing pile pressing twice, installing a pile driver pin 9 to connect the pile driving rod 8 with the pile top of the first combined pile when the pile is pressed once, smoothly pressing the pile to a preset depth, pulling the pile until the pile top is exposed out of the ground by 0.5m, removing the pin 9, aligning the pile driving rod 8 with the pile top, and performing secondary pile pressing to the preset depth;
Step eight: the equipment is moved to a third pile position, a pile delivery rod 8 is hung in, after straightening, a cap-shaped steel sheet pile locking port 202 is connected, the pile delivery rod 8 is pressed into a guide hole and then pulled out, and the depth of the guide hole is +0.1-0.2m of the height difference between the lower end surfaces of the cap-shaped steel sheet pile 2 and the H-shaped steel 1;
Step nine: hanging a third combined pile, pressing the protruding section of the H-shaped steel 1 at the lower end, and pressing the pile until the top of the hat-shaped steel sheet pile 2 is level with the ground after the hat-shaped steel sheet pile is locked with the opening 202;
Step ten: hanging a pile driving rod 8, and connecting the pile driving rod 8 with the pile top of the second combined pile by a mounting pin 9, and pressing the pile to a preset depth twice;
Step eleven: repeating the steps of eight-ten until the completion.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (10)
1. The static pile sinking construction method for the combined pile of the hat-shaped steel sheet pile and the H-shaped steel is characterized by comprising the following steps of:
S1: selecting proper types of cap-shaped steel sheet piles (2) and H-shaped steel (1) according to project stratum conditions and surrounding environments;
s2: preparing construction, leveling a site, measuring and paying off, positioning a locking line at the outer edge of the cap-shaped steel sheet pile (2) and an outer edge line of the H-shaped steel (1), and determining a pile-down point;
S3: a guide frame is arranged along the advancing direction of the pile sinking, a clamping plate is arranged at the locking opening (202) of the hat-shaped steel sheet pile (2) in the advancing direction of the pile sinking, the locking opening (202) at the front side of the hat-shaped steel sheet pile (2) is locked, and both sides of the hasp of the locking opening (202) are filled with sizing blocks and wood tenons;
s4: hanging a first combined pile, positioning and straightening, and adopting a static pile press to press the pile until the top of the cap-shaped steel sheet pile (2) is just flush with the ground, wherein the H-shaped steel (1) is exposed out of the ground;
S5: hanging a pile-delivering rod (8) to the next pile position, after straightening, connecting a cap-shaped steel sheet pile locking port (202), pressing the pile-delivering rod (8) into a guiding hole, and pulling out the pile-delivering rod, wherein the depth of the guiding hole is calculated from the whole section of the pile-delivering rod (8), and the depth is +0.1-0.2m of the height difference between the lower end surfaces of the cap-shaped steel sheet pile (2) and the H-shaped steel (1);
S6: hanging a second combined pile, pressing the protruding section of the H-shaped steel (1) at the lower end into the second combined pile, locking the opening (202) of the hat-shaped steel sheet pile, and pressing the pile until the top of the hat-shaped steel sheet pile (2) is level with the ground;
S7: hanging a pile-delivering rod (8), and connecting the pile-delivering rod (8) with the pile top of the first combined pile by a mounting pin (9), and pressing the pile to a preset depth;
S8: the equipment is moved to a third pile position, a pile delivery rod (8) is hung in, after straightening, a cap-shaped steel sheet pile locking port (202) is connected, the pile delivery rod (8) is pressed into a leading hole and then pulled out, and the depth of the leading hole is the height difference +0.1-0.2m between the lower end surfaces of the cap-shaped steel sheet pile (2) and the H-shaped steel (1);
S9: hanging a third combined pile, pressing the protruding section of the H-shaped steel (1) at the lower end of the third combined pile into the protruding section, and pressing the pile until the top of the hat-shaped steel sheet pile (2) is level with the ground after the hat-shaped steel sheet pile is locked (202) is locked;
s10: hanging a pile-delivering rod (8), and connecting the pile-delivering rod (8) with the pile top of the second combined pile by a mounting pin (9), and pressing the pile to a preset depth;
S11: and repeating the steps S8-S10 to perform subsequent pile position construction until finishing.
2. The static pile sinking construction method for the combined pile of the hat-shaped steel sheet pile and the H-shaped steel according to claim 1, wherein the combined pile comprises the hat-shaped steel sheet pile (2) and the H-shaped steel (1), the H-shaped steel (1) is arranged in parallel along the splicing direction of a locking notch (202) of the hat-shaped steel sheet pile (2), a web plate (201) of the hat-shaped steel sheet pile (2) is tightly attached to one side flange (101) of the H-shaped steel (1), two rows of bolt connecting holes (3) are formed in the contact surface of the web plate along the length direction in advance, and the high-strength bolts (4) are tightly connected with nuts (5) to form the hat-shaped combined steel sheet pile structure.
3. The static pile sinking construction method for the combined pile of the hat-shaped steel sheet pile and the H-shaped steel according to claim 2, wherein the design value of the tensile and shearing resistance bearing capacity of the single high-strength bolt (4) is required to meet the following relation:
High strength bolt friction type connection:
high-strength bolt bearing type connection:
Wherein: n t、Nv is the design value of the tensile force and the shearing force born by each bolt under the action of external force; the design value of the tensile and shearing bearing capacity of a single high-strength bolt is designed; The compressive bearing capacity design value of a single high-strength bolt is set; n f is the number of force transmission friction surfaces of a high-strength bolt; μ is the coefficient of slip resistance of the friction surface; p is the pretension of a high strength bolt.
4. The static pile sinking construction method of the combined pile of the hat-shaped steel sheet pile and the H-shaped steel according to claim 2, wherein the pile top of the combined pile is buried below the ground, the upper end of the hat-shaped steel sheet pile (2) is 800-1000mm lower than the upper end face of the H-shaped steel (1), reinforcing steel plates (7) are fully welded on the inner flange side of a web plate (102) at the higher part of the H-shaped steel (1), 4 pin connecting holes are distributed on the reinforcing steel plates in a square manner, the hat-shaped steel sheet pile (2) is ensured not to be connected with a crown beam (6), and the lower end of the hat-shaped steel sheet pile (2) is higher than the lower end face of the H-shaped steel (1) to form a variable cross section.
5. The static pile sinking construction method for combined piles of hat-type steel sheet piles and H-type steel according to claim 4, wherein the size of the reinforcing steel plate (7) is 350mm x 400mm, the thickness is 5-10mm, and the aperture of the pin connection hole is 70mm.
6. The static pile sinking construction method for the combined pile of the cap-shaped steel sheet pile and the H-shaped steel according to claim 1, wherein the pile delivering rod (8) is formed by connecting and combining the cap-shaped steel sheet pile (2) and the H-shaped steel (1) through high-strength bolts (4), the section model is the same as that of the combined pile, the rod length is larger than the burying depth of the combined pile top, the lower end of the cap-shaped steel sheet pile (2) of the pile delivering rod is lower than the lower end face of the H-shaped steel (1) by 800-1000mm, and the height difference is consistent with the upper end of the combined pile.
7. The static pile sinking construction method for the combined pile of the cap-type steel sheet pile and the H-shaped steel according to claim 6, wherein a pile feeder (801) is welded on the inner edge side of a web plate (102) at the lower end of the H-shaped steel (1) of the pile feeding rod (8), the pile feeder (801) is formed by symmetrically welding four steel plates, the size is 400mm multiplied by 500mm, the thickness is 5-10mm, 4 pin connecting holes (802) are distributed in a square shape, the aperture is 70mm, the pile feeding rod (8) is connected with the combined pile through pins (9), and the diameter of the pins (9) is smaller than the aperture of the pin connecting holes (802).
8. The static pile sinking method for combined pile of hat-shaped steel sheet pile and H-shaped steel according to claim 1, wherein in the step S7, when the pile is pressed to a predetermined depth by the pile driving rod (8), the pile is pressed twice, the pile driving pin (9) is installed when the pile is pressed once, after the pile is smoothly pressed to the predetermined depth, the pile is pulled until the pile top is exposed to the ground by 0.5m, the pile driving pin (9) is removed, and the pile driving rod (8) and the pile top are aligned, and the pile is pressed twice to the predetermined depth.
9. The static pile sinking construction method for the combined pile of the hat-shaped steel sheet pile and the H-shaped steel according to claim 1, wherein the hat-shaped steel sheet pile (2) is a hot rolled steel sheet pile with a hat-shaped section, asymmetric Larson locking openings are adopted, the hat-shaped steel sheet pile and the H-shaped steel sheet pile are arranged on two sides in the width direction, the hat-shaped steel sheet pile and the H-shaped steel sheet pile are integrally connected through the hot rolled locking openings after being formed into a wall, and the specification is NS-SP-10H, NS-SP-25H, and the H-shaped steel (1) is hot rolled wide flange H-shaped steel, middle flange H-shaped steel or narrow flange H-shaped steel.
10. The static pile sinking method for the combined pile of the cap-type steel sheet pile and the H-shaped steel according to claim 1, wherein two theodolites are adopted to strictly control the precision in two directions during pile sinking, the horizontal position and the verticality of the combined pile are measured every 1m, and when the deflection is too large and can not be adjusted by a drawing method, the pile is lifted and driven or the wedge-shaped steel sheet pile is adopted for correcting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410736705.3A CN118563754A (en) | 2024-06-07 | 2024-06-07 | Static pile sinking construction method for combined pile of cap-shaped steel sheet pile and H-shaped steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410736705.3A CN118563754A (en) | 2024-06-07 | 2024-06-07 | Static pile sinking construction method for combined pile of cap-shaped steel sheet pile and H-shaped steel |
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