CN218952192U - Self-stabilizing foundation pit supporting combined structure of fish web beam and front supporting pile - Google Patents
Self-stabilizing foundation pit supporting combined structure of fish web beam and front supporting pile Download PDFInfo
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- CN218952192U CN218952192U CN202223314367.XU CN202223314367U CN218952192U CN 218952192 U CN218952192 U CN 218952192U CN 202223314367 U CN202223314367 U CN 202223314367U CN 218952192 U CN218952192 U CN 218952192U
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Abstract
The utility model provides a self-stabilizing foundation pit supporting combined structure of a fish web beam and a front supporting pile, which comprises a plurality of fish web beam nodes, a plurality of front supporting pile self-stabilizing foundation pit supporting nodes and a plurality of supporting piers; and two ends of the fish web beam node are connected with the front supporting pile self-stabilizing foundation pit supporting node through the supporting piers. According to the self-stabilizing type foundation pit supporting combined structure for the fish web beam and the front supporting pile, the fish web beam and the self-stabilizing type foundation pit supporting structure for the front supporting pile are combined, key nodes are divided into a plurality of modules, a construction site only needs common workers to assemble according to drawing requirements, special operators are not needed to participate in the assembly process, the operation is simple, the time of the whole assembly process is shortened, the quality is improved, dynamic adjustment is carried out, the construction period pressure and the resource occupation are greatly reduced, a component is repeatedly utilized, and an axial force servo system is arranged, so that the quality and the safety are ensured.
Description
Technical Field
The utility model relates to the technical field of foundation pit supporting structures, in particular to a self-stabilizing foundation pit supporting combined structure of a fish web beam and a front supporting pile.
Background
The foundation pit supporting structures with large area foundation pit, large side length and no opposite support are mainly slope-releasing, gravity dam and the like, and the two supporting structures of the fish web beam and the front supporting pile self-stabilizing foundation pit supporting structure have respective advantages, but also have respective disadvantages, for the foundation pit supporting with large area, large side length, deep foundation pit and no opposite support. How to make up for the advantages of the combination is urgent.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the self-stabilizing type foundation pit supporting combined structure of the fish web beam and the front supporting pile, which combines the two supporting structures of the fish web beam and the front supporting pile, divides key nodes into a plurality of modules, comprehensively adopts a factory processing mode to process the module processing components, only needs common workers to assemble according to the drawing requirements in a construction site, does not need special operators to participate in the assembly process, has simple operation, shortens the time of the whole assembly process compared with the welding connection form of the traditional fish web beam and the front supporting pile, improves the quality, dynamically adjusts, greatly reduces the pressure and the resource occupation of a construction period, recycles the components, and can be provided with an axial force servo system to ensure the quality and the safety.
In order to achieve the above purpose, the utility model provides a self-stabilizing foundation pit supporting combined structure of a fish web girder and a front supporting pile, which comprises a plurality of fish web girder nodes, a plurality of front supporting pile self-stabilizing foundation pit supporting nodes and a plurality of supporting piers; and two ends of the fish web beam node are connected with the front supporting pile self-stabilizing foundation pit supporting node through the supporting piers.
Preferably, the fish web beam node comprises a plurality of bridges, a plurality of straight web members, an upper chord beam, a plurality of inclined web members, a plurality of connecting rods, a lower chord steel strand, two anchors and two connecting rods; the straight web members are vertically arranged at intervals; the bridge is connected to the bottom of the straight web member; the upper chord beam is connected to the top end of each straight web member; the inclined web member is supported between the straight web member and the upper chord beam; the connecting rod is connected between one straight web member positioned in the middle and two adjacent straight web members; the two ends of the fish belly beam node are respectively fixed with the anchor and the connecting rod which are connected; the lower chord steel stranded wire is connected between the two anchors and connected with each bridge; and the two anchors are connected with the support pier.
Preferably, the self-stabilizing foundation pit supporting node of the front supporting pile comprises: a dewatering well, a plurality of guard piles, a ring beam, a pressing top plate and two front supporting piles; the guard piles are arranged on the periphery of the dewatering well; the ring beam is arranged at the top of the fender post; the roof pressing plate is arranged at the top of the dewatering well; the front supporting piles are connected with the ring beams and extend into the ground; the ring beam is connected with the support pier.
Preferably, the front supporting pile self-stabilizing foundation pit supporting node further comprises a reinforcement cushion layer and two water stopping sheets; the reinforcement cushion layer is arranged beside the fender post; the water stop sheet is connected to the front supporting piles.
Preferably, the bottom of the front stay is provided with a reinforcement.
Preferably, the front supporting pile self-stabilizing foundation pit supporting node is provided with a limiting device.
Preferably, the buttress comprises: a plurality of bored piles or steel pipe piles, connecting rods or ring beams.
The utility model adopts the technical proposal, which has the following beneficial effects:
1. the foundation pit supporting device can meet the foundation pit supporting requirements of large-area foundation pits, large side lengths, deep foundation pits and no opposite support;
2. the modularized assembly type support is selected, so that the quality safety guarantee is improved, and the occupation of human resources is greatly reduced;
3. the modularized assembly type support is selected, so that welding fire operation is omitted, dangerous sources are reduced, and construction safety is ensured;
4. the time required by the assembly type support is short, so that the construction period is saved; greatly reduces the construction period pressure and is beneficial to quality acceptance;
5. as a bridge tunnel, the large-span enclosure section adopts a front supporting pile self-stabilizing foundation pit supporting node, and the smaller span adopts two supporting structures of a fish web beam node. And the middle support pier is in transitional connection with the fish web beam node and the front support pile self-stabilizing foundation pit support node. Can borrow each other when hitting an obstacle.
6. The advantages of the two combined structures of the fish web beam and the front supporting pile self-stabilizing foundation pit support are fully brought into play, and the advantages and the disadvantages are compensated.
Drawings
FIG. 1 is a schematic diagram of a fish web girder node according to an embodiment of the present utility model;
FIG. 2 is a schematic structural view of a self-stabilizing foundation pit supporting node of a front supporting pile according to an embodiment of the present utility model;
fig. 3 is a schematic structural view of a self-stabilizing foundation pit supporting combined structure of a fish web girder and a front supporting pile according to an embodiment of the present utility model.
Detailed Description
The following description of the preferred embodiments of the present utility model will be given with reference to fig. 1 to 3 of the accompanying drawings, so that the functions and features of the present utility model can be better understood.
Referring to fig. 1 to 3, a self-stabilizing foundation pit supporting combined structure of a fish web beam and a front supporting pile according to an embodiment of the present utility model includes a plurality of fish web beam nodes, a plurality of front supporting pile self-stabilizing foundation pit supporting nodes and a plurality of supporting piers 17; the two ends of the fish web beam node are connected with the front supporting pile self-stabilizing foundation pit supporting node through supporting piers 17.
The fish web beam node comprises a plurality of bridge frames 2, a plurality of straight web members 3, an upper chord beam 6, a plurality of inclined web members 7, a plurality of connecting rods 4, a lower chord steel strand 1, two anchors 8 and two connecting rods 5; the vertical web members 3 are vertically arranged at intervals; the bridge 2 is connected to the bottom of the straight web member 3; the upper chord beam 6 is connected to the top end of each straight web member 3; the inclined web member 7 is supported between the straight web member 3 and the upper chord member 6; the connecting rod 4 is connected between the straight web members 3 positioned in the middle and the adjacent two straight web members 3; two ends of the fish belly beam node are respectively fixed with an anchorage device 8 and a connecting rod 5 which are connected; the lower chord steel stranded wire 1 is connected between the two anchors 8 and is connected with each bridge 2; the two anchors 8 are connected with the support piers 17.
The self-stabilizing foundation pit supporting node of front supporting pile includes: a dewatering well 11, a plurality of fender piles 9, a ring beam 12, a roof pressing plate 10 and two front supporting piles 13; the guard piles 9 are arranged on the periphery of the dewatering well 11; the ring beam 12 is arranged on the top of the fender post 9; the pressure top plate 10 is arranged at the top of the dewatering well 11; the front supporting piles 13 are connected with the ring beams 12 and extend into the ground; the ring beam 12 is connected with a support pier 17.
The front supporting pile self-stabilizing foundation pit supporting node also comprises a reinforcement cushion layer 14 and two water stopping sheets 16; the reinforcement cushion layer 14 is arranged beside the fender post 9; the water stop 16 is connected to the front stay 13.
The bottom of the front stay 13 is provided with a reinforcement 15.
The front support pile self-stabilizing foundation pit supporting node is provided with a limiting device 18.
The support pier 17 includes: a number of bored piles or steel pipe piles, connecting rods or girts 12.
The two supporting structures of the fish web beam and the front supporting pile self-stabilizing type foundation pit support have respective applicable advantages for foundation pit support of large area, large side length, deep foundation pit and no pair support, but have respective disadvantages. The key points of the key points are that the components and the assembly thereof, the support piers 17, the connection of the fish web beam and the ring beam 12 of the two support structures of the self-stabilizing foundation pit support of the front support pile, and the like.
After the pile sinking or the bored pile of a group of steel pipe piles is completed, a supporting pier 17 is formed and is connected with the guard piles 9 and the ring beams 12, and two supporting structure nodes of self-stabilizing foundation pit supporting through the fish web beams and the front supporting piles are rigidly connected with the ring beams 12 or the large bottom plate of the foundation pit so as to ensure the integrity of a guard stress system.
As like a bridge tunnel, the large-span enclosure section adopts two supporting structures of front supporting pile self-stabilization type foundation pit supporting, and the smaller span adopts two supporting structures of fish web beam foundation pit supporting. And the middle supporting pier 17 is in transitional connection with the two supporting structures of the self-stabilizing foundation pit supporting of the front supporting pile.
The utility model solves the problem of combining two supporting structures of the self-stabilizing foundation pit supporting of the fish web beam and the front supporting pile by the following four measures:
1. the assembly modularized design is fully adopted, the components are processed in a factory, and the processing is finished before the construction, so that the quality, the environment and the safety control are facilitated;
2. the construction support pier 17 and the guard piles 9 are designed, the large-span guard section adopts two support structures of front support pile self-stabilization type foundation pit support, and the small span adopts two support structures of fish web beam foundation pit support. And the middle supporting pier 17 is in transitional connection with the two supporting structures of the self-stabilizing foundation pit supporting of the front supporting pile. Pit-in-pit border pit reinforcement, passive zone pier or skirt reinforcement. The support piers 17 are connected with the fender piles 9 and the ring beams 12. The supporting pier 17 can also adopt group bored piles or steel pipe piles, and can be pulled up and recovered after the utilization.
3. The method comprises the steps of on-site assembly, adopting finish rolling steel bar opposite-penetrating design, guaranteeing the anchoring length, and simultaneously taking the complete steel bar as a stress key point of an anchoring node to ensure the integrity of a stress original piece; the connection mode of the anchor node and the steel pipe is changed from welding to bolting, and the construction rate is greatly improved by directly fastening finish-rolled screw-thread steel by using a matched nut;
4. and (3) reserving grouting holes, and filling cement paste after the assembly is completed, so that the integrity is further improved.
5. The prestress is applied according to the sequential grading circulation of the 'previous pile supporting self-stabilizing foundation pit support and the rear fish web girder';
6. the application of the prestress fish-bellied steel support system is in accordance with the following conditions: the strength of the support piers 17, the soil retaining structure and the concrete crown beam (wale) when the prestress is applied is more than 80% of the design strength;
7. after the prestressing force is applied, the bolts between the fish belly sill and the waist beams at the two ends and the bolts between the joists and the supports are locked. The self-stabilizing foundation pit support of the front support pile and the steel strand are used for monitoring the axial force of the front support and the steel strand in the prestress application process, compensating according to the prestress loss condition and locking after reaching the prestress design value and keeping stable.
8. And the foundation pit engineering adopting the prestressed fish-bellied steel support system can excavate the lower earthwork after the installation of the support system is completed and the applied prestress reaches the design value. The front supporting pile self-stabilizing foundation pit supporting structure is divided into layers, the pit edge reinforcement cushion layer 14 is excavated in blocks, and earthwork with the designed width is arranged; immediately after the excavation, the construction reinforcement mat layer 14 is tracked. The front support grouting steel pipe pile penetrates through the bottom plate area to be provided with a water stop steel plate, and the front support grouting steel pipe pile is cast on the same day (within 8 hours) when excavated on the same day.
9. In the foundation pit engineering implementation process, the prestress is added again according to the change condition of the prestress and the requirement of foundation pit deformation control.
10. The front support pile self-stabilization type foundation pit supporting and assembling type limiting device 18, foundation pit deformation monitoring and supporting piers 17 are coordinated with the prestress fish-web type steel support system.
According to the self-stabilizing foundation pit supporting combined structure of the fish web beam and the front supporting pile, the guard piles 9, the supporting piers 17 and the ring beam 12 are firstly constructed. After the pile sinking, grouting and core filling procedures of the front-support grouting steel pipe pile are completed, a hole is formed in the pile head part corresponding to the member sleeve module, then a cluster finish rolling screw steel penetrates into a connecting member according to the corresponding hole position, a matched finish rolling nut is screwed and fastened, and a limiting device 18 is installed to construct prestress through a prestress servo system. And (3) pre-stressing is circularly applied in a grading mode according to the sequence of the 'self-stabilizing foundation pit support of the previous supporting pile and the rear fish web girder'. And the foundation pit engineering adopting the prestressed fish-bellied steel support system can excavate the lower earthwork after the installation of the support system is completed and the applied prestress reaches the design value. The front supporting pile self-stabilizing foundation pit supporting structure is divided into layers, the pit edge reinforcement cushion layer 14 is excavated in blocks, and earthwork with the designed width is arranged; immediately after the excavation, the construction reinforcement mat layer 14 is tracked. The front supporting piles 13 penetrate through the bottom plate area to be provided with water stop sheets 16, and the water stop sheets are poured on the same day (within 8 hours) when the excavation is carried out on the same day. In the foundation pit engineering implementation process, the prestress is added again according to the change condition of the prestress and the requirement of foundation pit deformation control. The front support pile is self-stabilized type foundation pit supporting and assembling type limiting device 18, and foundation pit deformation monitoring and prestress fish belly type steel support system are coordinated.
The present utility model has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the utility model based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the utility model, which is defined by the appended claims.
Claims (7)
1. The self-stabilizing foundation pit supporting combined structure of the fish web beam and the front supporting piles is characterized by comprising a plurality of fish web beam nodes, a plurality of front supporting pile self-stabilizing foundation pit supporting nodes and a plurality of supporting piers; and two ends of the fish web beam node are connected with the front supporting pile self-stabilizing foundation pit supporting node through the supporting piers.
2. The self-stabilizing foundation pit supporting combined structure of a fish web beam and a front supporting pile according to claim 1, wherein the fish web beam node comprises a plurality of bridges, a plurality of straight web members, an upper chord beam, a plurality of inclined web members, a plurality of connecting rods, a lower chord steel strand, two anchors and two connecting rods; the straight web members are vertically arranged at intervals; the bridge is connected to the bottom of the straight web member; the upper chord beam is connected to the top end of each straight web member; the inclined web member is supported between the straight web member and the upper chord beam; the connecting rod is connected between one straight web member positioned in the middle and two adjacent straight web members; the two ends of the fish belly beam node are respectively fixed with the anchor and the connecting rod which are connected; the lower chord steel stranded wire is connected between the two anchors and connected with each bridge; and the two anchors are connected with the support pier.
3. The fish web girder and front bracing pile self-stabilizing type foundation pit supporting combined structure according to claim 1, wherein the front bracing pile self-stabilizing type foundation pit supporting construction node comprises: a dewatering well, a plurality of guard piles, a ring beam, a pressing top plate and two front supporting piles; the guard piles are arranged on the periphery of the dewatering well; the ring beam is arranged at the top of the fender post; the roof pressing plate is arranged at the top of the dewatering well; the front supporting piles are connected with the ring beams and extend into the ground; the ring beam is connected with the support pier.
4. The fish web beam and front support pile self-stabilization type foundation pit supporting combined structure according to claim 3, wherein the front support pile self-stabilization type foundation pit supporting node further comprises a reinforcement cushion layer and two water stopping sheets; the reinforcement cushion layer is arranged beside the fender post; the water stop sheet is connected to the front supporting piles.
5. The self-stabilizing foundation pit supporting combined structure of a fish web girder and a front supporting pile according to claim 4, wherein a reinforcement body is arranged at the bottom of the front supporting pile.
6. The fish web beam and front support pile self-stabilizing type foundation pit supporting combined structure according to claim 5, wherein limiting devices are arranged at the front support pile self-stabilizing type foundation pit supporting nodes.
7. The combination structure of a fish web girder and a front bracing pile self-stabilizing foundation pit support according to claim 6, wherein the support pier comprises: a plurality of bored piles or steel pipe piles, connecting rods or ring beams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223314367.XU CN218952192U (en) | 2022-12-09 | 2022-12-09 | Self-stabilizing foundation pit supporting combined structure of fish web beam and front supporting pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223314367.XU CN218952192U (en) | 2022-12-09 | 2022-12-09 | Self-stabilizing foundation pit supporting combined structure of fish web beam and front supporting pile |
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| CN218952192U true CN218952192U (en) | 2023-05-02 |
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| CN202223314367.XU Active CN218952192U (en) | 2022-12-09 | 2022-12-09 | Self-stabilizing foundation pit supporting combined structure of fish web beam and front supporting pile |
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| CN (1) | CN218952192U (en) |
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