CN115045291A - Subway station foundation pit assembled tubular pile support and construction method - Google Patents
Subway station foundation pit assembled tubular pile support and construction method Download PDFInfo
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- CN115045291A CN115045291A CN202210743080.4A CN202210743080A CN115045291A CN 115045291 A CN115045291 A CN 115045291A CN 202210743080 A CN202210743080 A CN 202210743080A CN 115045291 A CN115045291 A CN 115045291A
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- 238000010276 construction Methods 0.000 title claims abstract description 34
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 65
- 239000004567 concrete Substances 0.000 claims abstract description 15
- 210000001503 joint Anatomy 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims description 23
- 230000002787 reinforcement Effects 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 238000006073 displacement reaction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000010008 shearing Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 241001669679 Eleotris Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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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
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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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
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
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Abstract
The invention discloses a subway station foundation pit assembled tubular pile support and a construction method, and relates to the technical field of subway station construction, wherein each first support comprises at least two sections of tubular piles, the tubular piles are connected through tubular pile connecting pieces, the tubular piles are connected with crown beams through nodes, and node reinforcing devices are arranged at the nodes; the joint reinforcing device comprises two butt joint parts, each part comprises a clamping part attached to the outer wall of the tubular pile, one end, facing the crown beam, of each clamping part is provided with a protruding part, and the two protruding parts are in butt joint to form a disc structure; the convex part is tangentially fixed with a reinforcing member. The invention uses the tubular pile to replace the original concrete support as the first support of the subway station, and the tubular pile can be recycled after the construction of the station is finished, thereby being closer to the concept of green engineering and reducing the construction cost of the engineering. Meanwhile, the tubular pile has high strength and light dead weight, can reduce the bending moment of a node and improve the safety.
Description
Technical Field
The invention relates to the technical field of subway station construction, in particular to a subway station foundation pit assembled tubular pile support and a construction method.
Background
The first support of traditional subway station adopts cast in situ concrete to support mostly, and the manual work, machinery, the material volume that cast in situ concrete supported needs are big, and certain time limit for a project all need be consumed in ligature reinforcing bar, concreting and maintenance moreover. Meanwhile, the cast-in-place concrete support cannot be recycled and reused, the support can only be dismantled after the construction of the station is completed, and the support needs to be cut into small blocks during dismantling, so that the construction risk and the efficiency are low, the concrete after dismantling can also become building waste, the environment is polluted, the resource waste is caused, and the concept of green development is not met.
At present, some prefabricated or recyclable subway supporting schemes exist, but the subway supporting schemes cannot be applied to practical application due to the problems that components are special, mass production cannot be achieved, construction is difficult, safety cannot be guaranteed and the like. For example: CN206438513U discloses a subway station foundation ditch repeatedly usable precast concrete supports, and this scheme connects precast concrete rectangle support and the overhanging cast-in-place section of crown beam back through the ring flange and uses as the first support of subway station to reach the purpose of supporting first middle part prefabricated section used repeatedly. However, compared with the traditional support, the support connecting section reduces the rigidity of the whole first support, and meanwhile, because corresponding measures are not taken to strengthen the stress capacity of the whole support, the safety is not ensured. And the overhanging section is still cast in situ concrete and needs to be dismantled finally, and the whole body does not achieve the purpose of complete recoverability for the first support.
CN112031026A discloses a subway station faces combination open cut structure of keeping in touch with forever and construction method, and this scheme links first support and prefabricated roof support and forms and faces combination roof structure forever, makes first support change from temporary structure to permanent structure, need not demolish again. However, the actual subway station construction site is narrow and small, the construction space is limited, if the support is not detached, the construction of other parts is affected, and the construction efficiency and the construction quality cannot be guaranteed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an assembled tubular pile support for a foundation pit of a subway station and a construction method. Meanwhile, the tubular pile has high strength and light dead weight, can reduce the bending moment of a node and improve the safety.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the embodiment of the invention provides a subway station foundation pit assembled tubular pile support, wherein each first support comprises at least two sections of tubular piles, the tubular piles are connected through tubular pile connecting pieces, the tubular piles are connected with crown beams through nodes, and node reinforcing devices are arranged at the nodes;
the joint reinforcing device comprises two butt joint parts, each part comprises a clamping part attached to the outer wall of the tubular pile, one end, facing the crown beam, of each clamping part is provided with a protruding part, and the two protruding parts are in butt joint to form a disc structure; the convex part is tangentially provided with a reinforcing member.
As a further implementation mode, connecting plates are symmetrically arranged on two sides of the clamping portion, and one end of each connecting plate is fixed with the corresponding protruding portion;
the connecting plates opposite to the two clamping parts are connected through a connecting piece.
As a further implementation manner, the reinforcing member includes a first reinforcing plate fixed tangentially with the boss, and two ends of the first reinforcing plate are connected to the butt joint of the clamping portion through second reinforcing plates respectively.
As a further implementation, the second reinforcing plate is obliquely arranged.
As a further implementation mode, the tubular pile connecting piece comprises an inner cylinder and an outer cylinder which are coaxially arranged, and an installation cavity is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder; the inner cylinder circumference has the overhanging section of fixing with the urceolus inner wall, and overhanging section divides into two installation regions with the installation cavity.
As a further implementation, the inner cylinder is a concrete solid structure; overhanging section is equipped with a plurality of overhanging reinforcing bars along circumference interval, overhanging reinforcing bar inserts in the tubular pile.
As a further implementation, the urceolus corresponds installation zone sets up the regulating part along circumference interval, the regulating part and the inboard movable plate butt of urceolus rotate the regulating part so that movable plate and the laminating of tubular pile outer wall.
As a further implementation, the moving plate is an arc-shaped plate.
In a second aspect, an embodiment of the present invention further provides a construction method for a subway station foundation pit fabricated tubular pile support, including:
when the tubular pile is connected with the crown beam, the tubular pile is firstly primarily connected with the tubular pile through the flange plate, and then the flange connection is further reinforced through the node reinforcing device; firstly, mounting the lower half part of the node reinforcing device at a node joint, and then mounting the upper half part;
connecting adjacent tubular piles through tubular pile connecting pieces, firstly inserting one section of tubular pile into the tubular pile connecting piece, and enabling the overhanging reinforcing steel bars to extend into the tubular piles; rotating the adjusting piece to enable the moving plate to be attached to the outer wall of the tubular pile; and then inserting the second section of pipe pile into the pipe pile connecting piece, and rotating the adjusting piece.
As a further implementation mode, firstly, excavating to a lower elevation of a support, hoisting the tubular pile to the position near the support, and then constructing a closed crown beam; the tubular pile is transferred into a stacking area in the foundation pit, and the tubular pile is transferred to an installation area through a track and a matched trolley.
The invention has the following beneficial effects:
(1) the tubular pile is used as a first support of the subway station instead of the original concrete support, and the tubular pile can be recycled after the construction of the station is finished, so that the method is closer to the concept of green engineering and can reduce the construction cost of the engineering; meanwhile, the tubular pile has high strength and light dead weight, can reduce the bending moment of a node, can meet the requirement of strong design such as traditional support and the like, and improves the safety of engineering.
(2) The connection between the tubular pile and the crown beam is reinforced through the node reinforcing device, so that the strength of the node is improved, the node can better bear bending moment and shearing force, and the safety of the tubular pile when the tubular pile is used as a support is improved; make two tubular pile zonulae occludens through the tubular pile connecting piece, compare with traditional support, reduced the displacement at support middle part, improved and supported middle part rigidity, make whole more stable.
(3) The invention defines links of on-site transportation, installation and the like when the tubular pile is used as the first support of the subway station, forms an assembly construction method when the tubular pile is used as the support of the subway station by laying a track and using a matched transportation trolley, saves the construction space and reduces the installation cost of the tubular pile.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic view of a tube pile support structure according to one or more embodiments of the present invention;
fig. 2 is a schematic view of a tube stake and crown beam joint according to one or more embodiments of the present invention;
FIG. 3 is a perspective view of a node reinforcement device according to one or more embodiments of the present disclosure;
FIG. 4 is a front view of a node reinforcement device in accordance with one or more embodiments of the present disclosure;
fig. 5 is a top view of a tube stake connector of the present invention according to one or more embodiments;
FIG. 6 is a cross-sectional view A-A of FIG. 5;
fig. 7 is a side view of a tube stake connector of the present invention in accordance with one or more embodiments;
FIG. 8 is a schematic diagram of a moving plate configuration according to one or more embodiments of the present invention;
fig. 9 is a side view of a tube stake according to one or more embodiments of the present invention;
fig. 10 is a schematic view of the installation of a tube pile connector according to one or more embodiments of the present invention;
11(a) and 11(b) are simulation diagrams of the present invention according to one or more embodiments;
FIG. 12(a) is a diagram showing a conventional simulation of the displacement of a support;
fig. 12(b) is a simulation diagram of the displacement of the connection and support of two pipe piles according to one or more embodiments of the present invention;
fig. 12(c) is a simulation diagram of the support displacement of a single tubular pile;
fig. 13 is a schematic view of a pile stack according to one or more embodiments of the present invention;
FIG. 14 is a top view of a track according to one or more embodiments of the invention;
FIG. 15 is a side view of a track according to one or more embodiments of the invention;
FIG. 16 is a schematic illustration of a corner of a rail according to one or more embodiments of the invention;
FIG. 17 is a schematic illustration of the placement of a rail within a foundation pit according to one or more embodiments of the present invention;
FIG. 18 is a schematic illustration of a cart layout according to one or more embodiments of the present disclosure;
FIGS. 19(a) and 19(b) are schematic illustrations of a cart in accordance with one or more embodiments of the present invention;
fig. 20 is a schematic illustration of a hoist according to one or more embodiments of the present invention.
The steel pipe pile comprises a pipe pile body, a reserved sleeve, a crown beam body, a node reinforcing device, a joint portion, a clamping portion, a second reinforcing plate, a bolt hole, a pipe pile connecting piece, a clamping portion 302, a second reinforcing plate, a bolt hole, a first reinforcing plate 304, a protruding portion, a connecting plate 305, a connecting plate 306, a bolt hole, a pipe pile connecting piece, a second reinforcing plate 401, an outer cylinder 402, an inner cylinder 403, an extending steel bar 404, an adjusting piece, a movable plate 405, a movable plate 5, a sleeve, a first reinforcing plate 6, an end plate 7, a flange, a second reinforcing plate 8, a bolt, a second reinforcing plate 9, a rail, a trolley 10, a trolley 11 and a winch.
Detailed Description
The first embodiment is as follows:
the embodiment provides an assembly type tubular pile support for a foundation pit of a subway station, and aims to solve the problems that the prior first support mostly adopts cast-in-place concrete support and cannot be recycled, and the like, the tubular pile replaces the cast-in-place concrete support; as shown in fig. 1, the tubular pile comprises at least two sections of tubular piles 1, the tubular piles 1 are connected through tubular pile connecting pieces 4, the tubular piles 1 are connected with the crown beams 2 through nodes, and node reinforcing devices 3 are installed at the nodes.
At present, the width of a platform of a subway station is about 12 meters mostly, the width of a foundation pit is about 20 meters, and in consideration of factors such as production, transportation, installation and removal, the tubular pile 1 of the embodiment is prefabricated by 9.5 meters per section, and two sections of tubular piles 1 are required for each support.
The node structure is shown in fig. 2 and comprises a flange 7, wherein an end plate 6 is arranged between one side of the flange 7 and the tubular pile 1 and is connected with the tubular pile through a bolt 8; the other side of the flange 7 is connected with the sleeve 5 in the crown beam 2 through a bolt 8. In order to reinforce the connection at the node, a node reinforcing device 3 is installed at the node; as shown in fig. 3 and 4, the node reinforcing device 3 is composed of two parts symmetrical with respect to the pipe pile 1, and the two parts are butted and connected by bolts.
In the present embodiment, the two parts of the node reinforcing device 3 respectively comprise the clamping portion 301, the protruding portion 304 and the reinforcing member, wherein the clamping portion 301 and the protruding portion 304 may form an integrated structure. The inner surface of the clamping part 301 is attached to the outer surface of the tubular pile 1, and the cross section of the clamping part is of a semicircular structure.
The protruding portions 304 are fixed at one end of the clamping portion 301 close to the crown beam 2, and are of semicircular ring structures protruding out of the surface of the clamping portion 301, and the two protruding portions 304 are in butt joint to form a circular disc structure.
In order to facilitate the connection between the clamping portions 301, connecting plates 305 are respectively fixed at the butt joints of the two sides of the clamping portions 301, and the connecting plates 305 are arranged along the axial direction of the clamping portions 301 and are fixed with the protruding portions 304; the upper and lower parts are fixed by contacting the corresponding connecting plates 305 and connecting the two connecting plates 305 with bolts.
The reinforcing member comprises a first reinforcing plate 303 and a second reinforcing plate 302, wherein the first reinforcing plate 303 is externally tangent to a boss 304, and a tangent point is located in the middle of the boss 304; the first stiffening plates 303 of the two parts of the node stiffening means 3 are parallel to each other. In the present embodiment, the first reinforcing plate 303 is fixed to the boss 304 by welding.
Two ends of the first reinforcing plate 303 are respectively connected with a second reinforcing plate 302, one end of the second reinforcing plate 302 is fixed with the first reinforcing plate 303, and the other end is connected to the surface of the connecting plate 305; the connection position of the second reinforcing plate 302 and the connecting plate 305 may be determined according to the stress requirement, and the second reinforcing plate 302 forms an inclined state; for example, the second reinforcing plate 302 is connected to the connecting plate 305 at an intermediate position.
The upper part of the boss of this embodiment is made of high-strength steel, as shown in fig. 4, bolt holes 306 are provided in the upper and lower bosses 304, in this embodiment, four bolt holes 306 are uniformly distributed in the upper boss 304, three bolt holes 306 are uniformly distributed in the lower boss 304, a class a bolt made of M24 is used for the bolt, the strength is 8.8, and the effective cross-sectional area is a e ＝3.53cm 2 ，
Of course, in other embodiments, the bolt parameters may be adjusted as desired.
The connecting plate 305 is also provided with bolt holes, and in order to ensure the close fit between the node reinforcing device 3 and the tubular pile 1, the bolts at the positions are high-strength bolts.
As shown in fig. 5-7 and 10, the pipe pile connector 4 includes an inner cylinder 402 and an outer cylinder 401 coaxially disposed, the inner cylinder 402 is a concrete solid structure, the outer cylinder 401 is a hollow structure, and an installation cavity is formed between the outer wall of the inner cylinder 402 and the inner wall of the outer cylinder 401.
An overhanging steel bar 403 is fixed along the axial direction of the overhanging section, and the overhanging steel bar 403 extends out of the surface of the overhanging section by a certain length and is used for matching with the reserved sleeve 101 of the tubular pile 1 shown in fig. 9, so that the two are firmly inserted. The overhanging steel bars 403 are uniformly distributed along the circumference of the overhanging section.
In order to ensure the connection stability of the tubular pile 1 and the tubular pile connecting piece 4, the inner side of the outer cylinder 401 is provided with a plurality of moving plates 405, as shown in fig. 7 and 8, the moving plates 405 are distributed along the circumference of the outer cylinder 401, the moving plates 405 abut against the adjusting pieces 404 extending out of the surface of the outer cylinder 401, and the moving plates 405 are pushed to be attached to the outer wall of the tubular pile 1 by rotating the adjusting pieces 404.
In this embodiment, the adjustment member 404 is a bolt.
The inner wall of the outer cylinder 401 is provided with a groove for accommodating a moving plate 405, and the moving plate 405 is arc-shaped to be matched with the tubular pile 1.
Further, this embodiment carries out finite element analysis to node reinforcing apparatus 3 and tubular pile connecting piece 4:
after the concrete support is changed into the tubular pile 1 support, the bending moment and the shearing force generated by the self weight of the support at the node are reduced by about half because the self weight of the tubular pile 1 is light. When the tubular pile 1 is used for supporting, a bending moment of about 500 and a shearing force of 200KN are generated at a node position due to self weight and construction load. The bolt stress at the node is thus simulated using ABAQUS.
As shown in fig. 11(a) and 11(b), it is shown that the mainly stressed bolts are four bolts of the upper half of the disc, the main deformation is also concentrated on the upper half of the node reinforcing device 3, and the lower half bolts are changed into three bolts based on the actual stress of the node reinforcing device 3 in the subway support, so that the stress requirement can be met, and the positioning is facilitated. Meanwhile, the strength of the upper half device is properly enhanced, and steel with higher quality is used, so that the effect of controlling deformation is achieved.
This node reinforcing apparatus 3 laminates in the first reality that supports the atress of subway station like this, and through the inseparable laminating of node reinforcing apparatus 3 and tubular pile 1, increase tubular pile 1 and crown beam 2's connection degree moreover, guarantees that it can be better bear various axial force and moment of flexure, more safe and reliable.
The influence of ABAQUS simulation tubular pile connecting piece 4 on the displacement of first support middle part is used equally, and the load is dead weight and construction load, construction load 4. By comparing fig. 12(a) and 12(b), the pipe pile support can greatly reduce displacement due to self-weight and construction load. As shown by comparing fig. 12(b) and fig. 12(c), the two tubular piles provided with the node reinforcing device have almost no change in displacement of the support midpoint compared with one full-length tubular pile, which indicates that the node reinforcing device 3 can play a good role in connecting the tubular piles, so that the displacement of the two tubular piles 1 can not be increased due to self weight while the two tubular piles are firmly connected.
Therefore, the rigidity of the joint is improved by using the joint connecting device 3, so that the whole structure is more stable, the stress performance is better, and the connecting piece of the joint can be disassembled and reused, thereby being beneficial to the promotion of the integral assembly of the station.
This embodiment uses tubular pile 1 to replace original concrete support, treats to can retrieve tubular pile 1 after the station construction is accomplished and recycles, presses close to the theory of green engineering more, also can reduce the cost of engineering. Meanwhile, the tubular pile 1 is high in strength and light in dead weight, can reduce node bending moment, can meet the requirements of strong design such as traditional support and the like, and improves the safety of engineering.
The connection between the tubular pile 1 and the crown beam 2 is reinforced through the node reinforcing device 3, so that the strength of the node is improved, the node can better bear bending moment and shearing force, and the safety of the tubular pile 1 when used as a support is improved; make two tubular pile 1 zonulae occludens through tubular pile connecting piece 4, compare with traditional support, reduced the displacement at support middle part, improved and supported middle part rigidity, make whole more stable.
Example two:
the embodiment provides a construction method of a subway station foundation pit assembled tubular pile support, which comprises the following steps:
firstly, excavating to a lower elevation of a support, hoisting the tubular pile 1 to the position near the support through a crane after the tubular pile reaches a construction site, and then constructing a closed crown beam. As shown in fig. 13, the tubular pile 1 is lifted into the foundation pit for stacking, so that the tubular pile can be conveniently transported in a short distance from the stacking area to the mounting position in the next step.
The next step is to carry the tube pile a short distance, i.e. to transport the tube pile 1 from the vicinity of the support to the installation site. In order to leave enough space for other operations in the foundation pit as much as possible in consideration of the limited construction site, a rail 9 is arranged along the edge of the foundation pit, and as shown in fig. 14-17, the rail 9 adopts a c-shaped channel steel and is integrally in an L shape. The size of the rail can be set according to the range of the foundation pit.
As shown in fig. 18, when transporting the tubular pile 1, two front and rear trolleys 10 are needed, and the bottom of the trolley 10 matched with the track 9 is provided with universal wheels; as shown in fig. 19(a) and 19(b), a support seat is rotatably mounted on the trolley, and the surface of the support seat is an arc-shaped groove to adapt to the shape of the tubular pile 1; the tubular pile 1 is convenient to transfer through the rotation of the supporting seat.
The arc-shaped groove enables the tubular pile 1 to keep a relatively stable state in the transportation process, and the universal wheels and the rotatable mounting seat ensure that a first trolley for transporting the tubular pile 1 can smoothly complete steering of the tubular pile 1 through the turning point of the L-shaped track. Use L shape track can be under the condition that does not occupy too big place, make tubular pile 1's transportation labour saving and time saving more, the position coincidence of L shape orbital minor face and tubular pile 1 installation simultaneously accomplishes tubular pile 1 horizontal position in advance and adjusts well, so when tubular pile 1 accomplish turn to the back, only need carry on the adjustment in the vertical direction alright in order to install.
During transportation, the tubular pile 1 in the stacking area is moved beside the track 9, the stacking direction of the tubular pile 1 is parallel to the track 9, so that the tubular pile 1 rolls beside the track in a manual dragging mode, and then the tubular pile 1 is hoisted onto the trolley through the combination of the portal steel frame, the fixed pulley and the winch 11. The universal wheels can be additionally arranged at the bottom of the portal steel frame for moving the position.
Simultaneously, a lifting point is respectively arranged at the front and the back of the tubular pile 1, and the gantry steel frame is arranged across the track 9 and the tubular pile 1 during the lifting operation, and the tubular pile 1 is moved into the trolley 10 through a fixed pulley and a winch.
Because one support needs two tubular piles, after an installation of tubular pile 1 of one side is accomplished, can temporarily lay up sleeper or rail under tubular pile 1, play a temporary supporting role to installed tubular pile 1, can remove the sleeper after waiting for the other side tubular pile butt joint to accomplish.
When the tubular pile 1 is connected with the crown beam 2, the tubular pile 1 is firstly connected with the tubular pile 1 primarily through the flange 7, and then the flange 7 is further reinforced through the node reinforcing device 3, so that the tubular pile can better bear bending moment and shearing force. The tubular pile 1 and the tubular pile 1 are connected through a tubular pile connecting piece 4.
During construction, after tubular pile 1 is firstly connected with crown beam 2 primarily through flange 7, install the latter half of reinforcing apparatus to the joint, play the effect of a bearing, then install the upper half of reinforcing apparatus again, after the installation is accomplished, screw up the high-strength bolt in section of thick bamboo wall edge, make reinforcing apparatus and tubular pile 1 combine closely. And then the pipe pile and the crown beam are connected through the disc, the reserved bolt hole and the reserved thread on the crown beam 2 by using a bolt, and the integral connection of the pipe pile and the crown beam is reinforced.
The bolted connection of 3 discs departments of node reinforcing apparatus further strengthens the flange 7 connection between crown beam 2 and the tubular pile 1, and the bolted connection of connecting plate 305 department of upper and lower two parts combines together with the bracing steel sheet (second reinforcing plate 302), strengthens the whole atress performance of crown beam 2 and tubular pile 1, has increased the security that replaces the concrete with tubular pile 1 and supports.
The whole tubular pile connecting piece 4 is in a sleeve form, a section of tubular pile 1 is firstly inserted into the tubular pile connecting piece 4 during connection, the angle of the tubular pile connecting piece 4 is adjusted by paying attention to the angle, so that the overhanging reinforcing steel bar 403 in the tubular pile connecting piece 4 extends into the reserved sleeve 101 of the tubular pile, and the purpose of primary connection is achieved. Then the bolt at the inserting side is screwed down, and the moving plate 405 is pushed to move inwards, so that the tubular pile 1 is compressed, and the purpose of tight connection is achieved.
When the second section of tubular pile extends, the angle of the tubular pile 1 is firstly adjusted to enable the outward extending reinforcing steel bar 403 to be embedded with the reserved sleeve 101, then the bolt on the side is screwed down, and the two sections of tubular piles 1 are connected. When the pipe pile is disassembled, all the bolts are firstly unscrewed reversely, and then the pipe pile 1 is slowly pulled out.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The fabricated tubular pile supports for the foundation pit of the subway station are characterized in that each first support comprises at least two sections of tubular piles, the tubular piles are connected through tubular pile connecting pieces, the tubular piles are connected with crown beams through nodes, and node reinforcing devices are installed at the nodes;
the joint reinforcing device comprises two butt joint parts, each part comprises a clamping part attached to the outer wall of the tubular pile, one end, facing the crown beam, of each clamping part is provided with a protruding part, and the two protruding parts are in butt joint to form a disc structure; the convex part is tangentially provided with a reinforcing member.
2. The assembly type tubular pile support for the foundation pit of the subway station as claimed in claim 1, wherein connecting plates are symmetrically arranged on both sides of said clamping portion, and one end of each connecting plate is fixed to said protruding portion;
the connecting plates opposite to the two clamping parts are connected through a connecting piece.
3. The fabricated tubular pile support for the foundation pit of the subway station as claimed in claim 1, wherein said reinforcement member comprises a first reinforcement plate fixed tangentially with the projection, and two ends of the first reinforcement plate are connected to the butt joint of the clamping portion through second reinforcement plates respectively.
4. The subway station foundation pit assembled tubular pile support of claim 3, wherein said second reinforcing plate is obliquely arranged.
5. The fabricated tubular pile support for the foundation pit of the subway station as claimed in claim 1, wherein said tubular pile connecting member comprises an inner cylinder and an outer cylinder coaxially arranged, and an installation cavity is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder; the inner cylinder circumference has the overhanging section of fixing with the urceolus inner wall, and overhanging section divides into two installation regions with the installation cavity.
6. The fabricated tubular pile support for a foundation pit of a subway station as claimed in claim 5, wherein said inner cylinder is of concrete solid structure; overhanging section is equipped with a plurality of overhanging reinforcing bars along circumference interval, and overhanging reinforcing bar inserts the tubular pile tip and reserves the sleeve.
7. The fabricated tubular pile support of a subway station foundation pit as claimed in claim 5, wherein said outer cylinder is provided with adjusting pieces corresponding to said installation area along circumferential direction at intervals, said adjusting pieces are abutted with a moving plate inside said outer cylinder, and said adjusting pieces are rotated to make said moving plate fit with the outer wall of said tubular pile.
8. The subway station foundation pit assembled tubular pile support of claim 7, wherein said moving plate is an arc plate.
9. The construction method of the fabricated tubular pile support for the foundation pit of the subway station as claimed in any one of claims 1-8, comprising:
when the tubular pile is connected with the crown beam, the tubular pile is firstly primarily connected with the tubular pile through the flange plate, and then the flange connection is further reinforced through the node reinforcing device; firstly, mounting the lower half part of the node reinforcing device at a node joint, and then mounting the upper half part;
connecting adjacent tubular piles through tubular pile connecting pieces, firstly inserting one section of tubular pile into the tubular pile connecting piece, and enabling the overhanging reinforcing steel bars to extend into the end parts of the tubular piles to reserve sleeves; rotating the adjusting piece to enable the moving plate to be attached to the outer wall of the tubular pile; and then inserting the second section of pipe pile into the pipe pile connecting piece, and rotating the adjusting piece.
10. The construction method of the fabricated tubular pile support for the foundation pit of the subway station as claimed in claim 9, wherein the tubular pile is firstly excavated to the lower elevation of the support, the tubular pile is hoisted to the vicinity of the support, and then the closed crown beam is constructed; the tubular pile is transferred into a stacking area in the foundation pit, and the tubular pile is transferred to an installation area through a track and a matched trolley.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110004976U (en) * | 2009-11-12 | 2011-05-18 | 임철 | Bridge construction structure using steel pipe pile and composition beam for bicycle only |
| CN109024609A (en) * | 2018-08-01 | 2018-12-18 | 中南大学 | A kind of foundation pit supporting construction and its construction method based on old campshed |
| CN208362929U (en) * | 2018-06-19 | 2019-01-11 | 四川先舟建设工程有限公司 | A kind of steel pipe support support construction |
| CN208618421U (en) * | 2018-06-08 | 2019-03-19 | 常州大学怀德学院 | A kind of double tiltedly straight foundation pit combined support structure of height |
| CN110331728A (en) * | 2019-07-18 | 2019-10-15 | 武汉立诚岩土工程有限公司 | Movable steel tube stay and its mounting structure applied to Deep Foundation Pit Supporting Project |
| CN209779637U (en) * | 2019-03-22 | 2019-12-13 | 中国水利水电第八工程局有限公司 | Deep foundation pit steel pipe supporting device of PRC tubular pile supporting structure |
| CN213294418U (en) * | 2020-09-28 | 2021-05-28 | 广东金羊建材有限公司 | Lifting appliance suitable for concrete pipe pile |
| CN114045815A (en) * | 2021-12-03 | 2022-02-15 | 广东建基基础工程有限公司 | PRC (prestressed concrete pipe) pipe pile for deep foundation pit supporting and pile splicing method thereof |
-
2022
- 2022-06-28 CN CN202210743080.4A patent/CN115045291B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110004976U (en) * | 2009-11-12 | 2011-05-18 | 임철 | Bridge construction structure using steel pipe pile and composition beam for bicycle only |
| CN208618421U (en) * | 2018-06-08 | 2019-03-19 | 常州大学怀德学院 | A kind of double tiltedly straight foundation pit combined support structure of height |
| CN208362929U (en) * | 2018-06-19 | 2019-01-11 | 四川先舟建设工程有限公司 | A kind of steel pipe support support construction |
| CN109024609A (en) * | 2018-08-01 | 2018-12-18 | 中南大学 | A kind of foundation pit supporting construction and its construction method based on old campshed |
| CN209779637U (en) * | 2019-03-22 | 2019-12-13 | 中国水利水电第八工程局有限公司 | Deep foundation pit steel pipe supporting device of PRC tubular pile supporting structure |
| CN110331728A (en) * | 2019-07-18 | 2019-10-15 | 武汉立诚岩土工程有限公司 | Movable steel tube stay and its mounting structure applied to Deep Foundation Pit Supporting Project |
| CN213294418U (en) * | 2020-09-28 | 2021-05-28 | 广东金羊建材有限公司 | Lifting appliance suitable for concrete pipe pile |
| CN114045815A (en) * | 2021-12-03 | 2022-02-15 | 广东建基基础工程有限公司 | PRC (prestressed concrete pipe) pipe pile for deep foundation pit supporting and pile splicing method thereof |
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| CN115045291B (en) | 2023-03-10 |
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