Support pile top crown beam structure and construction process thereof

Abstract

The application discloses a crown beam structure at the top of a support pile, which comprises the support pile, a concrete crown beam is connected at the top of the support pile, the concrete crown beam and the support pile are in one-to-one correspondence, steel crown beams are connected between adjacent concrete crown beams, and the steel crown beams are prefabricated steel structures. The application also discloses a construction process of the crown beam structure at the top of the support pile, which comprises the following steps: S1, support pile pouring: a reinforcing cage of the support pile is fixedly connected with a positioning block at the top end, and one end of the positioning block is poured into the support pile; S2, joint installation: a joint is fixedly installed on one side of the positioning block; S3, steel crown beam installation: a steel crown beam is hoisted, and two ends of each steel crown beam are respectively connected with two joints; S4, concrete crown beam pouring: a concrete crown beam pouring formwork is erected, and concrete is poured for pouring; and S5, concrete crown beam maintenance. The application has the effects of shortening the construction time of the crown beam structure and accelerating the construction progress.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation pit construction, in particular to a crown beam structure at the top of a supporting pile and a construction process thereof. BACKGROUND

[0002] A foundation pit is a soil pit excavated at a foundation design position according to a foundation elevation and a foundation plane size. When the foundation pit is excavated deep, in order to ensure the safety of underground structure construction and the surrounding environment of the foundation pit, a supporting structure such as a retaining structure or a reinforcing structure is usually arranged at the side wall of the foundation pit. The most commonly used supporting structure is a columnar cast-in-place supporting pile supporting structure. A plurality of supporting piles are regularly arranged at the side wall of the foundation pit and play a role in retaining soil. A crown beam is connected at the top of the supporting pile and connects the supporting piles into a whole to strengthen the overall stability of the supporting structure.

[0003] The crown beam is generally constructed by cast-in-place. When the crown beam at the top of the cast-in-place supporting pile is constructed, the pile head needs to be broken after the concrete strength of the cast-in-place supporting pile reaches 70% of the design strength, the pile top reinforcement is exposed, a crown beam reinforcement cage is made at the top of the pile, the pile top reinforcement is embedded into the crown beam reinforcement cage, and finally the overall crown beam structure is supported and poured to form an integral structure of the crown beam and the supporting pile.

[0004] The above-mentioned cast-in-place construction of the crown beam has a large amount of work, occupies a long time, and affects the rapid progress of the construction progress. SUMMARY

[0005] In order to improve the problem that the cast-in-place construction of the crown beam at the top of the foundation pit supporting pile has a large amount of work, occupies a long time, and affects the construction progress, the present application provides a crown beam structure at the top of a supporting pile and a construction process thereof.

[0006] In a first aspect, the present application provides a crown beam structure at the top of a supporting pile, which adopts the following technical solution:

[0007] A crown beam structure at the top of a supporting pile, comprising a supporting pile, a concrete crown beam connected at the top of the supporting pile, the concrete crown beam and the supporting pile corresponding one by one, a steel crown beam connected between adjacent concrete crown beams, and the steel crown beam being a prefabricated steel structure.

[0008] Through the above technical solution, the concrete crown beam and the supporting pile are arranged one by one, the steel crown beam and the concrete crown beam are arranged in an interlaced manner, and the top of the supporting pile is connected to form an integral supporting system through the concrete crown beam and the steel crown beam. The arrangement of the concrete crown beam provides a guarantee for the strength of the supporting system, the arrangement of the steel crown beam avoids the on-site pouring of the entire crown beam structure, reduces the construction time, and the steel crown beam is a prefabricated component, which further shortens the construction time of the crown beam structure and accelerates the progress of the construction progress.

[0009] Optionally, the two ends of the steel crown beam are respectively connected to a joint, and the end of the joint away from the steel crown beam is poured and fixed inside the concrete crown beam.

[0010] By adopting the technical scheme, the concrete crown beam and the steel crown beam are connected through the joint, one end of the joint is poured in the concrete crown beam, the stability and strength of the connection are improved, and after the supporting structure is used, the steel crown beam can be removed from the joint, the steel crown beam is completely recycled, and the economic benefit of construction is improved.

[0011] Optionally, the steel crown beam is provided with an inner connecting groove at two ends, a support block is slidably connected in the inner connecting groove, and a plurality of support rods are horizontally fixed to one end of the support block; a counter slot is formed in one side of the joint, the support rods are inserted into the counter slot, a through hole vertically formed in the joint and communicating with the counter slot, through holes are formed in the support rods, first locking rods are simultaneously arranged in the joint and the support rods, second locking rods are simultaneously arranged in the steel crown beam and the support block, and the first locking rods and the second locking rods are threadedly connected with first nuts and second nuts respectively.

[0012] By adopting the technical scheme, when the joint and the steel crown beam are connected, the support rods are embedded in the joint, and the first locking rods and the second locking rods are arranged to connect, so that the operation is simple, the construction is convenient, the difficulty of pouring the crown beam is reduced, and the construction efficiency is improved.

[0013] Optionally, an inclined surface is arranged on one side of the support block, an extrusion piece is slidably connected to the steel crown beam, one end of the extrusion piece is abutted to the inclined surface of the support block, and the other end of the extrusion piece extends to the outside of the steel crown beam and is bolted to the steel crown beam; a return spring is further fixed to the support block, and the other end of the return spring is fixed to the groove bottom of the inner connecting groove.

[0014] By adopting the technical scheme, the construction personnel can push the support block by pressing the extrusion rod, which further facilitates the construction operation; and after the extrusion rod is pulled out, the support block will automatically return to the groove bottom of the inner connecting groove under the action of the elastic force of the return spring, which facilitates the disassembly during the subsequent recycling of the steel crown beam and improves the construction efficiency.

[0015] Optionally, a positioning block is fixedly connected to the reinforcement cage of the supporting pile, and one end of the positioning block is poured into the supporting pile; a horizontally arranged positioning rod is fixed to the end of the positioning block outside the supporting pile, and a positioning hole is arranged on one side of the joint, the positioning rod is inserted into the positioning hole and fixedly connected with the joint.

[0016] By adopting the technical scheme, the positioning block and the positioning rod are arranged to improve the connecting strength of the support pile, the concrete crown beam and the joint; the positioning block and the positioning rod are finally poured into the concrete crown beam, which further improves the structural strength of the concrete crown beam; and the positioning rod and the joint are connected by plugging, which facilitates the positioning and installation of the joint, reduces the positioning difficulty during the construction of the crown beam and further improves the construction efficiency.

[0017] Optionally, the positioning rod and the joint are steel structures, and the positioning rod and the joint are welded.

[0018] By adopting the technical scheme, the positioning rod and the joint are arranged to improve the connecting strength of the support pile, the concrete crown beam and the joint; the positioning block and the positioning rod are finally poured into the concrete crown beam, which further improves the structural strength of the concrete crown beam; and the positioning rod and the joint are connected by plugging, which facilitates the positioning and installation of the joint, reduces the positioning difficulty during the construction of the crown beam and further improves the construction efficiency.

[0019] In a second aspect, the application provides a crown beam construction process at the top of a support pile, which adopts the following technical scheme:

[0020] A crown beam construction process at the top of a support pile, comprising the following steps:

[0021] S1, support pile pouring: a positioning block is fixedly connected to the top end of the reinforcement cage of the support pile, and one end of the positioning block is poured into the inside of the support pile;

[0022] S2, joint installation: a joint is fixedly installed on one side of the positioning block;

[0023] S3, steel crown beam installation: a steel crown beam is hoisted and installed and connected with two joints at two ends, respectively;

[0024] S4, concrete crown beam pouring: the top of the support pile is chiseled, a concrete crown beam pouring formwork is erected, and concrete is poured for pouring;

[0025] S5, concrete crown beam maintenance.

[0026] Optionally, after the use of the support structure is completed, the steel crown beam part is removed and recycled.

[0027] In summary, the application has at least one of the following beneficial technical effects:

[0028] 1. By arranging the concrete crown beam and the steel crown beam, the concrete crown beam is arranged one-to-one with the support pile, the steel crown beam and the concrete crown beam are arranged in an interlaced manner, the top of the support pile is connected by the concrete crown beam and the steel crown beam to form an integrated support system; the arrangement of the concrete crown beam provides a guarantee for the strength of the support system, the arrangement of the steel crown beam avoids the complete on-site pouring of the crown beam structure, reduces the construction time, and the steel crown beam is a prefabricated component, which further shortens the construction time of the crown beam structure and accelerates the progress of the construction schedule.

[0029] 2. By setting the joint, the concrete crown beam and the steel crown beam are butt-jointed through the joint, one end of the joint is poured in the concrete crown beam, the stability and strength of the connection are improved, and after the supporting structure is used, the steel crown beam can be removed from the joint, the steel crown beam is completely recycled, and the economic benefit of construction is improved.

[0030] 3. By setting the positioning block and the positioning rod, the connection strength of the supporting pile, the concrete crown beam and the joint is improved; the positioning block and the positioning rod are finally poured into the concrete crown beam, and the structural strength of the concrete crown beam itself is further improved; and the positioning rod and the joint are connected in a plug-in manner, the positioning and installation of the joint are facilitated, the positioning difficulty during the construction of the crown beam is reduced, and the construction efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic view of a crown beam structure at the top of a supporting pile in the embodiment of the present application;

[0032] Figure 2 is a sectional view of a crown beam structure at the top of a supporting pile in the embodiment of the present application.

[0033] Mark 1, supporting pile; 11, reinforcing cage; 12, positioning block; 13, positioning rod; 2, concrete crown beam; 3, joint; 31, plug-in groove; 4, steel crown beam; 41, inner joint groove; 42, supporting block; 43, extrusion piece; 44, return spring; 45, supporting rod; 5, first locking rod; 51, first nut; 6, second locking rod; 61, second nut. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying Figures 1-2 The present application is further described in detail.

[0035] The embodiment of the present application discloses a crown beam structure at the top of a supporting pile, referring to Figure 1 , comprising a supporting pile 1, a concrete crown beam 2, a joint 3 and a steel crown beam 4, the supporting pile 1 is vertically provided with a plurality of pieces, and the plurality of supporting piles 1 are regularly arranged at the side wall of a foundation pit; the concrete crown beam 2 is poured and connected at the top of the supporting pile 1, and the concrete crown beam 2 and the supporting pile 1 are one-to-one correspondingly arranged; the joint 3 is provided with a plurality of pieces, and the joint 3 is distributed at both ends of the concrete crown beam 2, and part of the joint 3 is poured and fixed in the concrete crown beam 2; the steel crown beam 4 is installed and connected between two adjacent joints 3, so that the supporting pile 1, the concrete crown beam 2, the joint 3 and the steel crown beam 4 form an integral structure, and play a supporting role for the side wall of the foundation pit.

[0036] Referring to Figure 2 , the supporting pile 1 is a reinforced concrete structure, the reinforcing cage 11 of the supporting pile 1 is fixedly connected with the positioning block 12 during binding, one end of the positioning block 12 is arranged in the reinforcing cage 11 and is fixedly connected with the reinforcing cage 11, and is fixed in the supporting pile 1 after pouring; the other end of the positioning block 12 extends to the outside of the supporting pile 1 and is connected with the joint 3.

[0037] The end of the positioning block 12 extending to the outside of the support pile 1 is fixed with a plurality of positioning rods 13, the positioning rods 13 are horizontally arranged, the joint 3 is a block structure, a plurality of positioning holes are formed on one side of the joint 3, the positioning rods 13 are correspondingly arranged in the positioning holes and are fixed with the joint 3. The positioning block 12, the positioning rod 13 and the joint 3 are all arranged as steel structures, the connection mode of the positioning rod 13 and the joint 3 adopts welding, so that the construction is facilitated on site. The concrete crown beam 2 is a cast-in-place concrete structure, when pouring, the positioning block 12, the positioning rod 13 and part of the joint 3 are all poured into the inside of the concrete crown beam 2, so as to form a stable connection.

[0038] The side of the joint 3 away from the positioning rod 13 is connected with the steel crown beam 4. The steel crown beam 4 is a prefabricated steel structure, both ends of the steel crown beam 4 are provided with an inner connecting groove 41, a supporting block 42 is slidably connected in the inner connecting groove 41, the supporting block 42 is a block structure, one side of the supporting block 42 is provided with an inclined surface, a vertically arranged extrusion piece 43 is slidably connected on the steel crown beam 4, one end of the extrusion piece 43 is also provided with an inclined surface and abuts against the inclined surface of the supporting block 42, when the extrusion piece 43 moves towards the supporting block 42 under the action of an external force, the inclined surface of the supporting block 42 is stressed, so as to partially slide out to the outside of the inner connecting groove 41. The other end of the extrusion piece 43 extends to the outside of the steel crown beam 4 and is locked on the outer side surface of the steel crown beam 4 through a bolt.

[0039] The side of the supporting block 42 away from the slot of the inner connecting groove 41 is fixed with a return spring 44, the other end of the return spring 44 is fixed in the groove bottom of the inner connecting groove 41, when the external force of the extrusion piece 43 disappears, the supporting block 42 is retracted into the inner connecting groove 41 under the action of the elastic force of the return spring 44.

[0040] The side of the supporting block 42 facing the slot of the inner connecting groove 41 is fixed with a plurality of supporting rods 45, the supporting rods 45 are horizontally arranged; a plurality of pairs of insertion grooves 31 are formed on the end of the joint 3 away from the concrete crown beam 2, when the supporting block 42 extends to the outside of the inner connecting groove 41, the supporting rods 45 are correspondingly arranged in the pairs of insertion grooves 31.

[0041] Referring to Figure 1 and Figure 2 , a vertical through hole is formed on the joint 3 and communicates with the pairs of insertion grooves 31; a through hole is formed on each of the supporting rods 45, when the supporting rods 45 are inserted into the pairs of insertion grooves 31, the through holes on the supporting rods 45 and the corresponding through holes on the joint 3 are coaxial, at this time, the first locking rod 5 is arranged, the first locking rod 5 is arranged on the joint 3 and the supporting rods 45 at the same time, so as to form a limiting connection; both ends of the first locking rod 5 extend to the outside of the joint 3, and both ends of the first locking rod 5 are provided with external thread segments, the first nuts 51 are correspondingly screwed on the external thread segments, until one side of the first nut 51 abuts against the joint 3.

[0042] The steel crown beam 4 is provided with a vertical through hole, and the through hole is communicated with the inner groove 41; the support block 42 is also provided with a through hole, when the support rod 45 is inserted into the counter-inserting groove 31, the through hole of the support block 42 is moved to a position where the axis of the through hole of the support block 42 coincides with the axis of the through hole of the steel crown beam 4, at this time, the second locking rod 6 is penetrated, the second locking rod 6 is penetrated on the steel crown beam 4 and the support block 42, thereby forming a limiting connection; the two ends of the second locking rod 6 extend to the outside of the steel crown beam 4, and the two ends of the second locking rod 6 are provided with external thread segments, the second locking nut 61 is screwed on the external thread segments, until one side of the second locking nut 61 is pressed on the steel crown beam 4.

[0043] The implementation principle of the crown beam structure at the top of the support pile in the embodiment of the application is as follows: the support pile 1 is vertically arranged, the concrete crown beam 2, the joint 3 and the steel crown beam 4 are all provided with a plurality of groups, and are sequentially and spacedly connected, thereby forming an overall support structure. The concrete crown beam 2 and the joint 3 are connected by pouring, and the joint 3 and the steel crown beam 4 are connected by the support block 42 and the support rod 45, thereby accelerating the construction progress of the crown beam and improving the construction efficiency.

[0044] The embodiment of the application also discloses a construction method of a crown beam at the top of a support pile, comprising the following steps.

[0045] S1, pouring the support pile 1.

[0046] The position of the support pile 1 is measured and positioned according to design drawings, and is drilled and formed; the steel reinforcement cage 11 of the support pile 1 is bound, the positioning block 12 and the positioning rod 13 are fixedly connected to the top end of the steel reinforcement cage 11 of the support pile 1; the steel reinforcement cage 11 is inserted; the concrete is poured; one end of the positioning block 12 is poured into the support pile 1, and the other end of the positioning block 12 and the positioning rod 13 are located outside the top end of the support pile 1.

[0047] S2, installing the joint 3.

[0048] The joint 3 is fixedly installed on one side of the positioning block 12, the positioning rod 13 is inserted into the joint 3, and field welding is performed, thereby forming a fixed connection. A plurality of joints 3 are sequentially installed on the two sides of the positioning block 12.

[0049] S3, installing the steel crown beam 4.

[0050] The steel crown beam 4 is hoisted, the positions of the steel crown beam 4 and the support block 42 are corresponded, the pressing extrusion piece 43 is pressed, the support block 42 is pushed to extend to the outside of the end of the steel crown beam 4, until the support rod 45 is inserted into the counter-inserting groove 31 of the joint 3, and the pressing extrusion piece 43 is locked; the first locking rod 5 is penetrated, and the first locking nut 51 is screwed; the second locking rod 6 is penetrated, and the second locking nut 61 is screwed; the above steps are repeated, a plurality of steel crown beams 4 are sequentially installed between the corresponding two joints 3, thereby forming a preliminary connection of the crown beam structure.

[0051] S4, pouring the concrete crown beam 2.

[0052] The pile top of the support pile 1 is chiseled, a pouring formwork is erected on both sides of the designed position of the concrete crown beam 2, and the pouring of concrete is performed to pour the positioning block 12, the positioning rod 13 and the partial joint 3 into the interior of the concrete crown beam 2.

[0053] S5, curing of the concrete crown beam 2.

[0054] After the pouring is completed, the standard curing process is performed on the concrete crown beam 2 until the concrete crown beam 2 is shaped.

[0055] S6, recycling of the steel crown beam 4.

[0056] After the use of the support structure is completed, the restriction of the extrusion piece 43, the first locking rod 5 and the second locking rod 6 is released, the steel crown beam 4 is separated from the joint 3 one by one, and the recycling of the steel crown beam 4 is realized so as to be prepared for the next support use.

[0057] The embodiment is only an explanation of the application, and is not a limitation of the application. Those skilled in the art can make modifications to the embodiment without creative contribution according to the needs after reading the specification, and the modifications are protected by the patent law as long as they are within the scope of the claims of the application.

Claims

1. A capping beam structure at the top of a support pile, comprising support piles (1), characterized in that: A concrete cap beam (2) is poured and connected at the top of the support pile (1). The concrete cap beam (2) and the support pile (1) correspond one-to-one. A steel cap beam (4) is connected between adjacent concrete cap beams (2). The steel cap beam (4) is a precast steel structure. The steel crown beam (4) is connected to a joint (3) at both ends, and the end of the joint (3) away from the steel crown beam (4) is cast and fixed inside the concrete crown beam (2); The steel crown beam (4) has internal grooves (41) at both ends, and a support block (42) is slidably connected in the internal groove (41). Several support rods (45) are horizontally fixed to one end of the support block (42). A matching slot (31) is provided on one side of the joint (3), and the support rods (45) are inserted into the matching slot (31). The joint (3) has a vertically arranged through hole that communicates with the matching slot (31). The support rods (45) all have through holes. A first lock is simultaneously installed on the joint (3) and the support rods (45). The first locking rod (5) has a first nut (51) threaded to both ends of the first locking rod (5), and one side of the first nut (51) presses against the joint (3); the support block (42) has a through hole, and the steel crown beam (4) has a through hole communicating with the inner groove (41); the steel crown beam (4) and the support block (42) are simultaneously provided with a second locking rod (6), and the two ends of the second locking rod (6) are threaded to a second nut (61), and one side of the second nut (61) presses against the steel crown beam (4); An inclined surface is provided on one side of the support block (42), and an extrusion member (43) is slidably connected on the steel crown beam (4). One end of the extrusion member (43) abuts against the inclined surface of the support block (42), and the other end of the extrusion member (43) extends to the outside of the steel crown beam (4) and is bolted to the steel crown beam (4). A return spring (44) is also fixedly connected to the support block (42), and the other end of the return spring (44) is fixedly connected to the bottom of the inner groove (41).

2. The capping beam structure at the top of the support pile according to claim 1, characterized in that: A positioning block (12) is fixedly connected to the steel cage (11) of the support pile (1). One end of the positioning block (12) is cast inside the support pile (1). A horizontally arranged positioning rod (13) is fixedly connected to the end of the positioning block (12) located outside the support pile (1). A positioning hole is provided on one side of the joint (3). The positioning rod (13) is inserted into the positioning hole and fixedly connected to the joint (3).

3. The capping beam structure at the top of the support pile according to claim 2, characterized in that: Both the positioning rod (13) and the connector (3) are steel structures, and the positioning rod (13) and the connector (3) are welded together.

4. A construction process for a capping beam at the top of a support pile, based on the capping beam structure at the top of a support pile as described in any one of claims 1-3, characterized in that, Includes the following steps: S1, Casting of support pile (1): The top of the steel cage (11) of the support pile (1) is fixed to a positioning block (12), and one end of the positioning block (12) is cast into the inside of the support pile (1). S2, Connector (3) installation: Fix the connector (3) to one side of the positioning block (12); S3, Steel Crown Beam (4) Installation: Hoist the steel crown beam (4) and install and connect both ends of each steel crown beam (4) to two joints (3); S4, Concrete cap beam (2) pouring: roughen the top of the support pile (1), erect the concrete cap beam (2) pouring formwork, and pour concrete for pouring; S5, Curing of concrete cap beam (2).

5. The construction process of the capping beam at the top of the support pile according to claim 4, characterized in that: After the support structure is completed, the steel crown beam is removed and recycled (4).

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