Oblique throwing and supporting system with prestress capable of being compensated on line

Abstract

The utility model discloses an inclined throwing support system with prestress capable of being compensated on line, and belongs to the technical field of inclined throwing supports. The H-shaped steel inclined strut system comprises an H-shaped steel inclined strut system, a bearing platform foundation and a fender post, the H-shaped steel inclined strut system is arranged between the bearing platform foundation and the fender post in an inclined mode, the lower portion of the H-shaped steel inclined strut system is connected with the bearing platform foundation, and a back pressure connecting assembly is arranged on the upper portion of the H-shaped steel inclined strut system. The back pressure connecting assembly comprises a back pressure bracket, a supporting bracket and an H-shaped steel enclosing purlin. According to the inclined throwing support system, downward constraining force is provided through the back pressure bracket, so that it is guaranteed that the joint of the H-shaped steel inclined support system and the fender post does not deviate, and the overall stability of the inclined throwing support system is guaranteed; prestress on-line adjustment can be conducted through the prestress on-line compensation component, the component has a self-locking function, the supporting force of the H-shaped steel inclined strut system can adapt to changes of temperature stress and the like caused by temperature changes, and therefore a guarantee is provided for supporting safety of a foundation pit.

Description

Technical Field

[0001] The utility model relates to the technical field of diagonal braces, and more specifically to a diagonal brace system with prestressed material capable of online compensation. Background Art

[0002] In some cases where the excavation is large and less than 10 meters deep, to avoid the high cost and construction difficulty of horizontal support, people have designed inclined support structures. The inclined piles in the inclined support structure need to extend into the hard soil layer to be effective. Currently, traditional inclined support materials are mostly lattice columns or circular tube columns. The material processing and manufacturing process is cumbersome, the processing quality is difficult to control, the recycling rate is low, and the cost is high. At the same time, to improve the supporting force of the inclined support, the existing inclined support is generally composed of steel pipes and cement soil expansion heads wrapped around the steel pipes. The connection strength between the steel pipes and the expansion heads is low and cannot withstand large pressures. In addition, during construction, the steel pipes in the inclined piles will undergo significant compression deformation under the pressure of the soil outside the foundation pit. This causes the side walls of the foundation pit to deform inward, affecting the safety of the foundation pit. Due to the large variations in geological conditions between different projects, the current inclined support is mostly affected by geological changes, and the supporting force is unclear, which poses a safety hazard to the foundation pit support. At the same time, current technology, after applying prestress, sometimes removes the jacks and other prestressing components after placing gaskets and other connectors, while others weld the H-beam to the connecting plate after prestressing is complete. These situations fail to address the deformation and temperature stress caused by the steel's thermal expansion and contraction during use due to seasonal temperature fluctuations. Utility Model Content

[0003] 1. Technical problems to be solved by the utility model

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a prestressed diagonal brace system with online compensation. The present invention provides a downward restraining force through a back-pressure corbel, thereby ensuring that the connection between the H-steel diagonal brace system and the retaining piles will not be offset, thereby ensuring the overall stability of the diagonal brace system; the H-steel diagonal brace system is simultaneously connected to multiple groups of H-steel purlins through the upper end plate, thereby improving the overall safety of the foundation pit support; the prestressed pressure can be adjusted online through the prestressed pressure online compensation component, and the supporting force of the H-steel diagonal brace system can adapt to the temperature stress changes caused by temperature changes, thereby providing protection for the support safety of the foundation pit.

[0005] 2. Technical solution

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0007] The utility model discloses a prestressed inclined brace system with online compensation, comprising an H-shaped steel inclined brace system, a cap foundation and retaining piles, wherein the H-shaped steel inclined brace system is arranged obliquely between the cap foundation and the retaining piles;

[0008] The upper part of the H-shaped steel diagonal bracing system is provided with a counter-pressure connection assembly, which includes a counter-pressure corbel, a supporting corbel and an H-shaped steel purlin;

[0009] The counter-pressure corbel and the supporting corbel are fixed at intervals on the outside of the retaining pile, and an H-shaped steel purlin is provided between the counter-pressure corbel and the supporting corbel;

[0010] The upper part of the H-shaped steel diagonal bracing system is connected to the retaining piles through a counter-pressure connection assembly, and the lower part of the H-shaped steel diagonal bracing system is connected to the cap foundation.

[0011] Furthermore, a lower end plate is provided at the connection between the H-shaped steel diagonal bracing system and the pedestal foundation, and both ends of the lower end plate are respectively fixed to the H-shaped steel diagonal bracing system and the pedestal foundation.

[0012] Furthermore, an upper end plate is provided at the connection between the H-shaped steel diagonal bracing system and the H-shaped steel purlin.

[0013] Furthermore, the H-shaped steel purlins can be provided in one or more groups. When multiple groups of H-shaped steel purlins are provided, spacer brackets are provided between two adjacent groups of H-shaped steel purlins, and the outer surfaces of the multiple groups of H-shaped steel purlins are commonly connected to the upper end plate.

[0014] Furthermore, the H-shaped steel diagonal bracing system includes a first diagonal bracing member and a second diagonal bracing member, and a prestressed online compensation member is provided at the connection between the first diagonal bracing member and the second diagonal bracing member. The two ends of the prestressed online compensation member are respectively connected to the first diagonal bracing member and the second diagonal bracing member by bolts.

[0015] Furthermore, the prestressed online compensation component has a self-locking function, and the self-locking forms include but are not limited to thread self-locking, pad self-locking or force box self-locking.

[0016] Furthermore, one end of the upper end plate is fixed to the first diagonal brace, and the other end of the upper end plate is connected to multiple groups of H-shaped steel purlins through bolts;

[0017] One end of the lower end plate is fixed to the second diagonal support member, and the other end of the lower end plate is fixed to the bearing platform foundation.

[0018] Furthermore, a bearing platform foundation support pile is provided at the bottom of the bearing platform foundation.

[0019] Furthermore, the counter-pressure corbel and the supporting corbel are both arranged horizontally.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0022] The diagonal bracing system of this utility model provides downward restraint through the counter-pressure bracket, thereby ensuring that the connection between the H-shaped steel diagonal bracing system and the retaining piles will not deviate, thereby ensuring the overall stability of the diagonal bracing system; the H-shaped steel diagonal bracing system is simultaneously connected to multiple groups of H-shaped steel purlins through the upper end plate, thereby improving the overall safety of the foundation pit support;

[0023] The bottom of the H-shaped steel diagonal bracing system is supported by the pedestal foundation. The H-shaped steel diagonal bracing system does not need to be cut, and there will be no waste of materials. The H-shaped steel diagonal bracing system has built-in prestressed online compensation components, through which prestressed online adjustment can be performed, providing protection for the supporting force of the H-shaped steel diagonal bracing system and the support safety of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the overall structural diagram of the utility model;

[0025] Figure 2 This is a partial assembly drawing of the H-shaped steel diagonal bracing system of the present utility model;

[0026] Figure 3 It is a partial enlarged structural schematic diagram of the utility model.

[0027] In the figure: 1. H-shaped steel diagonal bracing system; 101. First diagonal bracing member; 102. Second diagonal bracing member; 103. Prestressed in-line compensation member; 2. Cap foundation; 3. Lower end plate; 4. Guard pile; 5. Counter-pressure connection assembly; 501. Counter-pressure corbel; 502. Support corbel; 503. H-shaped steel purlin; 504. Spacer corbel; 6. Upper end plate; 7. Basement raft slab; 8. Cap foundation support pile; 9. Counter-pressure soil around pile. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0029] Example 1

[0030] from Figure 1-3 It can be seen that the prestressed inclined bracing system with online compensation in this embodiment includes an H-shaped steel inclined bracing system 1, a cap foundation 2 and a retaining pile 4. The H-shaped steel inclined bracing system 1 is tilted between the cap foundation 2 and the retaining pile 4.

[0031] The upper part of the H-shaped steel bracing system 1 is provided with a counter-pressure connection assembly 5, which includes a counter-pressure corbel 501, a supporting corbel 502 and an H-shaped steel purlin 503;

[0032] The counter-pressure corbel 501 and the supporting corbel 502 are fixed at intervals on the outside of the retaining pile 4. The counter-pressure corbel 501 and the supporting corbel 502 are both arranged horizontally. An H-shaped steel purlin 503 is arranged between the counter-pressure corbel 501 and the supporting corbel 502.

[0033] The upper part of the H-shaped steel bracing system 1 is connected to the retaining pile 4 through the back pressure connection assembly 5, and the lower part of the H-shaped steel bracing system 1 is connected to the cap foundation 2.

[0034] A lower end plate 3 is provided at the connection between the H-shaped steel diagonal bracing system 1 and the pedestal foundation 2 , and both ends of the lower end plate 3 are fixed to the H-shaped steel diagonal bracing system 1 and the pedestal foundation 2 respectively.

[0035] An upper end plate 6 is provided at the connection between the H-shaped steel bracing system 1 and the H-shaped steel purlin 503 .

[0036] The H-shaped steel purlins 503 can be provided in one or more groups. When multiple groups of H-shaped steel purlins 503 are provided, a spacing corbel 504 is provided between two adjacent groups of H-shaped steel purlins 503. The outer surfaces of the multiple groups of H-shaped steel purlins 503 are commonly connected to the upper end plate 6.

[0037] The inclined bracing system of the utility model adopts finished steel sections as the material, has reliable quality, is intuitive and easy to control, can be connected to each other through simple processing, and has a high material recycling rate.

[0038] Example 2

[0039] from Figure 1-3 It can be seen that this embodiment is a prestressed diagonal brace system with online compensation, the H-shaped steel diagonal brace system 1 includes a first diagonal brace member 101 and a second diagonal brace member 102, and a prestressed online compensation member 103 is provided at the connection between the first diagonal brace member 101 and the second diagonal brace member 102, and the two ends of the prestressed online compensation member 103 are respectively connected to the first diagonal brace member 101 and the second diagonal brace member 102 by bolts.

[0040] The prestressed in-line compensation member 103 has a self-locking function, which includes but is not limited to thread self-locking, pad self-locking, or force box self-locking. This allows the supporting force of the H-shaped steel bracing system to adapt to the temperature stress changes caused by temperature changes, thereby ensuring the support safety of the foundation pit.

[0041] One end of the upper end plate 6 is fixed to the first diagonal brace 101, and can be fixed by any method such as welding, bolting or riveting. The other end of the upper end plate 6 is connected to multiple groups of H-shaped steel purlins 503 by bolts.

[0042] One end of the lower end plate 3 is fixed to the second diagonal brace 102 , and can be fixed by any means such as welding, bolting or riveting, and the other end of the lower end plate 3 is fixed to the base foundation 2 .

[0043] The connections between the H-shaped steel bracing system 1 and the cap foundation 2 or the back pressure connection assembly 5 are fixed by bolts, which is easy to disassemble.

[0044] The bottom of the cap foundation 2 is provided with a cap foundation support pile 8 for supporting the cap foundation 2;

[0045] When the H-shaped steel diagonal bracing system 1 is in use, it will generate an oblique force, and provide a downward restraining force through the counter-pressure corbel 501, thereby ensuring that the connection between the H-shaped steel diagonal bracing system 1 and the retaining pile 4 will not be offset, thereby ensuring the overall stability of the diagonal bracing system; the H-shaped steel diagonal bracing system 1 is simultaneously connected to multiple groups of H-shaped steel purlins 503 through the upper end plate 6, thereby improving the overall safety and stability of the foundation pit support.

[0046] The bottom of the diagonal bracing system of the present invention is supported by the pedestal foundation 2. The H-shaped steel diagonal bracing system 1 does not need to be cut, can adapt to different soil conditions, and will not cause material waste. The H-shaped steel diagonal bracing system 1 includes a first diagonal bracing member 101 and a second diagonal bracing member 102. A prestressed online compensation member 103 is provided at the connection between the first diagonal bracing member 101 and the second diagonal bracing member 102. The prestressed online compensation member 103 can be used to perform prestressed online adjustment, thereby providing protection for the supporting force of the H-shaped steel diagonal bracing system 1 and the support safety of the foundation pit.

[0047] The utility model supports the pedestal foundation 2 through the pedestal foundation support piles 8, and the lower part of the H-shaped steel diagonal bracing system 1 is fixed through the pedestal foundation 2, and no material is cut off; a prestressed online compensation component 103 is provided in the H-shaped steel diagonal bracing system 1 for prestressed online adjustment, so that the supporting force of the H-shaped steel diagonal bracing system 1 is clear, and the safety of the foundation pit support is guaranteed.

[0048] Example 3

[0049] from Figure 1-3 It can be seen that the construction method of a prestressed online compensating diagonal bracing system of this embodiment is characterized by the following steps:

[0050] Step 1: construct the foundation bearing pile 8;

[0051] Step 2: Taking the installation of two layers of H-shaped steel purlins 503 as an example, the first layer of soil is excavated to 600mm below the bottom of the H-shaped steel purlin 503. After the excavation of the first layer of soil is completed, the soil around the bottom cap foundation 2 is excavated synchronously, and the pile side counter-pressure soil 9 is reserved beside the retaining piles 4;

[0052] Step 3: construct the cap foundation 2 and the lower end plate 3;

[0053] Step 4: Welding the supporting bracket 502;

[0054] Step 5: Install the first layer of H-shaped steel purlin 503, fill the purlin seams, and weld the spacer brackets 504;

[0055] Step 6: Install the second-layer H-shaped steel purlin 503, fill the purlin seams, and weld the top counter-pressure corbel 501;

[0056] Step 7: The H-beam bracing system 1 is processed in the factory, and the inclination angle of the H-beam bracing system 1 is fine-tuned on site according to the actual size;

[0057] Step 8: Carve a groove in the pile side counter-pressure soil 9, assemble the first diagonal bracing member 101, the second diagonal bracing member 102, and the prestressed in-line compensation member 103, and then hoist the entire H-shaped steel diagonal bracing system 1 into the groove;

[0058] Step 9: The upper end of the first diagonal brace 101 is connected to the H-shaped steel purlin 503 through the upper end plate 6, and the lower part of the second diagonal brace 102 is connected to the base foundation 2 through the lower end plate 3;

[0059] Step 10: Pressurize the H-shaped steel bracing system 1 through the prestressed online compensation member 103. After the pressurization is completed, the pile side counter-pressure soil 9 and the remaining area can be excavated;

[0060] Step 11: Construct the basement raft 7 and the main structure. After the designed support removal conditions are met, release the internal stress of the support through the prestressed online compensation member 103 and remove the H-steel diagonal bracing system 1 one by one.

[0061] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A prestressed online compensating diagonal bracing system, comprising an H-shaped steel diagonal bracing system (1), a cap foundation (2) and retaining piles (4), characterized in that: The H-shaped steel diagonal bracing system (1) is arranged obliquely between the cap foundation (2) and the retaining pile (4); The upper part of the H-shaped steel bracing system (1) is provided with a back-pressure connection assembly (5), and the back-pressure connection assembly (5) includes a back-pressure bracket (501), a supporting bracket (502) and an H-shaped steel purlin (503); The counter-pressure corbel (501) and the supporting corbel (502) are fixed at intervals on the outside of the retaining pile (4), and an H-shaped steel purlin (503) is provided between the counter-pressure corbel (501) and the supporting corbel (502); The upper part of the H-shaped steel bracing system (1) is connected to the retaining pile (4) via a back pressure connection assembly (5), and the lower part of the H-shaped steel bracing system (1) is connected to the bearing platform foundation (2).

2. The prestressed online compensating diagonal bracing system according to claim 1, characterized in that: A lower end plate (3) is provided at the connection between the H-shaped steel diagonal bracing system (1) and the pedestal foundation (2), and both ends of the lower end plate (3) are respectively fixed to the H-shaped steel diagonal bracing system (1) and the pedestal foundation (2).

3. The prestressed online compensating diagonal bracing system according to claim 2, characterized in that: An upper end plate (6) is provided at the connection between the H-shaped steel diagonal bracing system (1) and the H-shaped steel purlin (503).

4. The prestressed online compensating diagonal bracing system according to claim 3, characterized in that: The H-shaped steel purlins (503) can be provided in one or more groups. When multiple groups of H-shaped steel purlins (503) are provided, a spacing bracket (504) is provided between two adjacent groups of H-shaped steel purlins (503). The outer surfaces of the multiple groups of H-shaped steel purlins (503) are commonly connected to the upper end plate (6).

5. The prestressed on-line compensating diagonal bracing system according to claim 4, characterized in that: The H-shaped steel diagonal bracing system (1) comprises a first diagonal bracing member (101) and a second diagonal bracing member (102); a prestressed in-line compensation member (103) is provided at the connection between the first diagonal bracing member (101) and the second diagonal bracing member (102); and two ends of the prestressed in-line compensation member (103) are respectively connected to the first diagonal bracing member (101) and the second diagonal bracing member (102) by bolts.

6. The prestressed online compensating diagonal bracing system according to claim 5, characterized in that: The prestressed in-line compensation component (103) has a self-locking function, and the self-locking forms include but are not limited to thread self-locking, pad self-locking or force box self-locking.

7. The prestressed on-line compensating diagonal bracing system according to claim 5, characterized in that: One end of the upper end plate (6) is fixed to the first diagonal bracing member (101), and the other end of the upper end plate (6) is connected to a plurality of groups of H-shaped steel purlins (503) through bolts; One end of the lower end plate (3) is fixed to the second diagonal support member (102), and the other end of the lower end plate (3) is fixed to the support base (2).

8. The prestressed on-line compensating diagonal bracing system according to claim 7, characterized in that: The bottom of the pedestal foundation (2) is provided with a pedestal foundation support pile (8).

9. The prestressed on-line compensating diagonal bracing system according to claim 7, characterized in that: The counter-pressure corbel (501) and the supporting corbel (502) are both arranged horizontally.

Images