A deep foundation pit lattice column top support structure

Abstract

This utility model relates to a top support structure for a lattice column in a deep foundation pit, comprising a lattice column, a connecting sleeve, a top support plate, and rib seats. The lattice column is vertically fixed, and its top is used to support the upper concrete structure. The connecting sleeve is fixedly fitted onto the lattice column, and the top support plate is fixed to the top of the connecting sleeve to provide support for the upper concrete structure. A clearance hole for the lattice column to pass through is provided in the center of the top support plate. Both the connecting sleeve and the lattice column are rectangular. Rib seats are fixedly connected to the four side walls of the connecting sleeve. Each rib seat includes multiple spaced ribs, which are fixedly connected to the top support plate. The top support plate provides support for the upper concrete structure, expanding the contact area between the lattice column and the upper structure. The top rib seat evenly distributes the load from the upper concrete structure to the perimeter of the lattice column, significantly reducing the risk of stress concentration at a single point and improving the safety and durability of the overall support system.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a deep foundation pit lattice column top support structure. Background Technology

[0002] In the field of civil engineering, trestle bridges, as an important temporary or permanent structure, are widely used in deep foundation pit construction operations. The safety and stability of their substructure support system are directly related to the overall quality and progress of the project.

[0003] In deep foundation pit construction, traditional trestle bridges often use ordinary steel pipe columns or concrete columns for their substructure support. These columns have problems such as limited load-bearing capacity, insufficient stability, and easy deformation. Especially under large span and heavy load conditions, they are difficult to meet the high requirements of modern engineering.

[0004] In response to this issue, lattice column top-support is commonly used in trestle bridge construction. The conventional construction process mainly involves welding triangular steel plates and I-beams onto the lattice column uprights as top-support nodes, and then pouring the upper concrete support structure on top. While this top-support node structure is simple and easy to implement, this process does not adequately consider the coordinated work between the lattice column and the upper support structure, leading to stress concentration and excessive deformation in the upper support structure, making it difficult to meet the requirements of large-span, heavy-load projects.

[0005] Therefore, it is necessary to study a deep foundation pit grid column top support structure. Utility Model Content

[0006] Therefore, the purpose of this utility model is to provide a deep foundation pit lattice column top support structure. By optimizing the connection structure of the lattice column top support node, the bearing capacity, stability and durability of the structure are improved. It aims to solve the problems of stress concentration and excessive deformation of the upper support structure caused by the existing lattice column top support node.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A deep foundation pit lattice column top support structure includes lattice columns, connecting sleeves, top support plates, and rib plate seats;

[0009] The lattice column is vertically fixed, and the top of the lattice column is used to install the upper concrete support;

[0010] The connecting sleeve is fixedly fitted onto the lattice column.

[0011] The top support plate is fixed to the top of the connecting sleeve and is used to support the upper concrete. A clearance hole is provided in the middle of the top support plate for the lattice column to pass through.

[0012] Both the connecting sleeve and the lattice column are rectangular. The four side walls of the connecting sleeve are fixedly connected with rib seats. The rib seats include multiple spaced ribs, and the ribs are fixedly connected to the top support plate.

[0013] Furthermore, the top support plate includes a front half top support plate and a rear half top support plate that are split from the middle and spliced ​​together; the connecting sleeve includes a left half sleeve and a right half sleeve that are split from the middle and spliced ​​together.

[0014] Furthermore, the rib seat includes a first rib seat and a second rib seat; the first rib seat is disposed on the left and right sides of the connecting sleeve, and the second rib seat is disposed on the front and rear sides of the connecting sleeve; both the first rib seat and the second rib seat include a plurality of spaced ribs.

[0015] Furthermore, the first rib plate seat also includes a top plate, the front and rear ends of which are detachably connected to the front half top support plate and the rear half top support plate, respectively, so as to splice and fix the front half top support plate and the rear half top support plate.

[0016] One side wall of the rib in the first rib seat is fixedly connected to the top plate, and the other side wall is fixedly connected to the connecting sleeve.

[0017] Furthermore, a connecting groove is provided on the top of the top support plate, and a connecting plate is provided in the connecting groove. The front and rear ends of the connecting plate are fixedly connected to the front half of the top support plate and the rear half of the top support plate, respectively.

[0018] Furthermore, the second rib plate seat also includes a bottom side plate, the left and right ends of which are detachably connected to the left half sleeve and the right half sleeve respectively, so as to splice and fix the left half sleeve and the right half sleeve.

[0019] One side wall of the rib in the second rib seat is fixedly connected to the bottom side plate, and the other side wall is fixedly connected to the top plate.

[0020] Furthermore, bolt kits are respectively provided on the left half sleeve and the left end of the bottom side plate, and on the right half sleeve and the right end of the bottom side plate. The bolt kits pass through the connecting sleeve, the lattice column and the front and rear second rib seats to fix the connecting sleeve, the lattice column and the front and rear second rib seats.

[0021] The beneficial effects of the above technical solution are:

[0022] (1) This utility model uses a rectangular connecting sleeve to cover the outside of the lattice column, and a top support plate is fixed on the top of the connecting sleeve to form a top support effect for the upper concrete support, which expands the stress contact surface between the lattice column and the upper structure. Multiple rib seats are fixedly connected between the top support plate and the connecting sleeve, which evenly transfers the load from the upper concrete structure to the lattice column, significantly reducing the risk of single-point stress concentration and improving the safety and durability of the overall support system.

[0023] (2) The present invention divides the top support plate from the middle and splices the front half top support plate and the rear half top support plate, and divides the connecting sleeve from the middle into the left half sleeve and the right half sleeve that are spliced ​​and connected. This effectively avoids the limitation that the traditional structure must slide in the whole set from the top of the lattice column. It can be assembled in four directions after the lattice column is constructed and then assembled into a post-construction node. This significantly improves the installation feasibility of the node system in narrow spaces or partially formed structures, facilitates later maintenance and replacement, and meets the engineering layout requirements under various complex working conditions. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0025] Figure 2 This is a front view schematic diagram of the present utility model;

[0026] Figure 3 This is a side view of the present invention;

[0027] Figure 4 for Figure 2 A cross-sectional view along the AA direction;

[0028] Figure 5 for Figure 3 Cross-sectional view along the BB direction;

[0029] Figure 6 This is a bottom view of the present invention;

[0030] Figure 7 This is an assembly drawing for connecting the sleeve, top support plate, and rib plate seat.

[0031] Reference numerals in the attached drawings: 1 is a lattice column, 2 is a connecting sleeve, 3 is a top support plate, 4 is a rib seat, 5 is an upper concrete support, 6 is a bolt kit, 201 is a left half sleeve, 202 is a right half sleeve, 301 is a front half top support plate, 302 is a rear half top support plate, 303 is a connecting groove, 304 is a connecting plate, 401 is a first rib seat, 402 is a second rib seat, 403 is a rib, 404 is a top plate, and 405 is a bottom side plate. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] This embodiment aims to provide a deep foundation pit lattice column top support structure, which addresses the problems of stress concentration and excessive deformation in the upper support structure caused by existing lattice column top support nodes.

[0034] A deep foundation pit lattice column top support structure, such as Figure 1The system includes a lattice column 1, a connecting sleeve 2, a top support plate 3, and a rib seat 4. The lattice column 1 is vertically fixed, and the top of the lattice column 1 is used to install the upper concrete support 5. The lattice column 1 adopts an existing lattice column 1, which is mainly composed of limbs and lacing materials. The cross-section is generally designed as a biaxially symmetrical or uniaxially symmetrical section of steel or steel plate. In this embodiment, for ease of demonstration, the lattice column 1 in the attached drawings is simplified.

[0035] Both the connecting sleeve 2 and the lattice column 1 are rectangular. The connecting sleeve 2 is fixedly sleeved on the lattice column 1 to provide a fixed foundation for the top support plate 3.

[0036] The top support plate 3 is fixed to the top of the connecting sleeve 2 to provide support for the upper concrete support 5. The top support plate 3 has a clearance hole in the middle for the lattice column 1 to pass through, so that the top support plate 3 can be fixedly sleeved on the lattice column 1. The use of the top support plate 3 can effectively disperse the stress in the node area, avoid stress concentration, and improve the load-bearing capacity and stability of the node.

[0037] The four side walls of the connecting sleeve 2 are all fixedly connected with rib plate seats 4. The rib plate seats 4 include three spaced pentagonal rib plates 403. The rib plates 403 are fixedly connected to the top support plate 3, which further enhances the overall rigidity and deformation resistance of the support structure and ensures the coordinated working performance of the lattice column 1 and the upper support structure.

[0038] like Figure 1-7 The top support plate 3 includes a front half top support plate 301 and a rear half top support plate 302 that are split and spliced ​​together from the middle. The connecting sleeve 2 includes a left half sleeve 201 and a right half sleeve 202 that are split and spliced ​​together from the middle. The splicing method achieves the effect of connecting by fitting, avoiding the need for top-down installation, which facilitates installation and allows for the addition and replacement of the top support plate 3 and the connecting sleeve 2 during later maintenance.

[0039] The rib seat 4 includes a first rib seat 401 and a second rib seat 402, both of which include three spaced ribs 403. The first rib seat 401 is located on the left and right sides of the connecting sleeve 2, used to fix the front half top support plate 301 and the rear half top support plate 302 together, and to fix the top support plate 3 to the connecting sleeve 2. Specifically, the first rib seat 401 also includes a top plate 404, the front and rear ends of which are bolted to the front half top support plate 301 and the rear half top support plate 302 respectively, to splice and fix the front half top support plate 301 and the rear half top support plate 302; one side wall of the rib in the first rib seat 401 is welded to the top plate 404 or integrally formed, and the other side wall is welded to the connecting sleeve 2.

[0040] The second rib plate seat 402 is disposed on the front and rear sides of the connecting sleeve 2, and is used to fix and connect the left half sleeve 201 and the right half sleeve 202. The second rib plate seat 402 also includes a bottom side plate 405, the left and right ends of which are detachably connected to the left half sleeve 201 and the right half sleeve 202 respectively, so as to fix the left half sleeve 201 and the right half sleeve 202 together; one side wall of the rib plate 403 in the second rib plate seat 402 is fixedly connected to the bottom side plate 405, and the other side wall is fixedly connected to the top plate 404.

[0041] Bolt kits 6 are respectively inserted through the left half sleeve 201 and the left end of the bottom side plate 405, and through the right half sleeve 202 and the right end of the bottom side plate 405. The bolt kits 6 pass through the connecting sleeve 2, the lattice column 1 and the front and rear second rib plate seats 402 to fix the connecting sleeve 2, the lattice column 1 and the front and rear second rib plate seats 402.

[0042] like Figure 1 The top of the top support plate 3 is provided with a connecting groove 303. The connecting groove 303 is cut in the middle along with the top support plate 3. The front half of the top support plate 301 and the rear half of the top support plate 302 are spliced ​​and fixed to form a complete connecting groove 303. A connecting plate 304 is provided in the connecting groove 303. The front and rear ends of the connecting plate 304 are fixedly connected to the front half of the top support plate 301 and the rear half of the top support plate 302 respectively, so as to strengthen the splicing connection of the front half of the top support plate 301 and the rear half of the top support plate 302.

[0043] In this embodiment, during installation, the left half sleeve 201 and the right half sleeve 202 are first fixedly spliced ​​onto the lattice column 1 using the second rib plate seat 402. Bolt kit 6 is then used to pass through the connecting sleeve 2, the lattice column 1, and the two front and rear second rib plate seats 402 to fix the connecting sleeve 2, the lattice column 1, and the two front and rear second rib plate seats 402. Then, the front half top support plate 301 and the rear half top support plate 302 are fixedly spliced ​​onto the lattice column 1 using the first rib plate seat 401. After the position is adjusted to the correct position, the rib plate 403 in the first rib plate seat 401 is welded to the connecting sleeve 2, and the rib plate 403 in the second rib plate seat 402 is welded to the top support plate 3.

Claims

1. A deep foundation lattice column jacking support structure, characterized by: Includes lattice columns, connecting sleeves, top support plates, and rib seats; The lattice column is vertically fixed, and the top of the lattice column is used to install the upper concrete support; The connecting sleeve is fixedly fitted onto the lattice column. The top support plate is fixed to the top of the connecting sleeve and is used to support the upper concrete. A clearance hole is provided in the middle of the top support plate for the lattice column to pass through. Both the connecting sleeve and the lattice column are rectangular. The four side walls of the connecting sleeve are fixedly connected with rib seats. The rib seats include multiple spaced ribs, and the ribs are fixedly connected to the top support plate.

2. The lattice column top support structure for deep foundation pit according to claim 1, characterized in that: The top support plate includes a front half top support plate and a rear half top support plate that are split from the middle and spliced ​​together; the connecting sleeve includes a left half sleeve and a right half sleeve that are split from the middle and spliced ​​together.

3. The deep foundation lattice column kick support structure according to claim 2, characterized in that: The rib seat includes a first rib seat and a second rib seat; the first rib seat is disposed on the left and right sides of the connecting sleeve, and the second rib seat is disposed on the front and rear sides of the connecting sleeve; both the first rib seat and the second rib seat include multiple ribs spaced apart.

4. The deep foundation lattice column kick support structure according to claim 3, characterized in that: The first rib plate seat also includes a top plate, the front and rear ends of which are detachably connected to the front half top support plate and the rear half top support plate, respectively, so as to splice and fix the front half top support plate and the rear half top support plate. One side wall of the rib in the first rib seat is fixedly connected to the top plate, and the other side wall is fixedly connected to the connecting sleeve.

5. The deep foundation pit lattice column top support structure according to claim 4, characterized in that: The top of the top support plate is provided with a connecting groove, and a connecting plate is provided in the connecting groove. The front and rear ends of the connecting plate are fixedly connected to the front half of the top support plate and the rear half of the top support plate, respectively.

6. The deep foundation lattice column kick support structure according to claim 3, wherein: The second rib plate seat also includes a bottom side plate, the left and right ends of which are detachably connected to the left half sleeve and the right half sleeve respectively, so as to splice and fix the left half sleeve and the right half sleeve. One side wall of the rib in the second rib seat is fixedly connected to the bottom side plate, and the other side wall is fixedly connected to the top plate.

7. The deep foundation lattice column kick support structure according to claim 6, wherein: Bolt kits are respectively provided on the left half sleeve and the left end of the bottom side plate, and on the right half sleeve and the right end of the bottom side plate. The bolt kits pass through the connecting sleeve, the lattice column and the front and rear second rib seats to fix the connecting sleeve, the lattice column and the front and rear second rib seats.

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