A foundation pit steel support structure and a supporting device and method having the same

Abstract

This invention provides a steel support structure for foundation pits and a support device and method having the structure, comprising: a first mounting base; a second mounting base, detachably disposed on the first mounting base and provided with a connecting column; a limiting member, including a limiting opening disposed on the first mounting base, and a first limiting slider and a second limiting slider arranged in a mirror image, the first limiting slider and the second limiting slider being slidably disposed on the first mounting base facing each other or away from each other, and respectively provided with a first opening and a second opening adapted to the limiting opening; and a mating member, including two first inclined surfaces arranged in a mirror image on the first limiting slider and the second limiting slider, and two second inclined surfaces disposed on the first mounting base. This invention solves the technical problems of difficulty in positioning steel pipes and the need for repeated adjustments in the prior art.

Description

Technical Field

[0001] This invention relates to the field of deep foundation pit steel support technology, and in particular to a foundation pit steel support structure and a support device and method having the structure. Background Technology

[0002] Existing steel pipe supports typically have movable and / or fixed ends. These ends transmit axial force to the cast-in-place or steel walers, which then transfer the supporting force to the retaining piles or diaphragm wall, forming a complete support system. Traditionally, steel support end plates are pre-embedded or welded into the walers during construction. This method has a long installation cycle, is not reusable, and results in high costs. Furthermore, the accuracy of the pre-embedded points is difficult to control; significant misalignment renders the end plates unusable.

[0003] To address this issue, Chinese utility model patent CN218933142U, entitled "A Steel Support End Support Hanging Plate," utilizes two steel waler clips mounted on the outer wall of the main board to detachably engage with the waler, thus resolving the problem of the pad being unable to be removed. However, since the steel pipe or its end is directly placed on the supporting copper plate after hoisting, there is a significant deviation in the steel pipe's position, requiring repeated adjustments to its orientation. Furthermore, the large size of the steel pipe makes adjustment difficult, and it is prone to rolling during adjustment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a steel support structure for foundation pits and a support device and method with the structure, which solves the technical problems of steel pipes being difficult to position and requiring repeated adjustments in existing technologies.

[0005] According to an embodiment of the present invention, a foundation pit steel support structure is provided for connecting a waler and a steel pipe, and supporting the steel pipe, wherein the steel pipe has a movable end and a fixed end arranged opposite to each other, and the foundation pit steel support structure includes:

[0006] The first mounting base is installed on the waler;

[0007] The second mounting base is detachably disposed from the first mounting base. The second mounting base is provided with a connecting post for connecting the flexible end or the fixed end of the steel pipe.

[0008] The limiting component includes a limiting port provided on the first mounting base, and a first limiting slider and a second limiting slider arranged in a mirror image with the central axis of the limiting port as the axis of symmetry. The first limiting slider and the second limiting slider are slidably disposed on the first mounting base facing each other or back to back, and are respectively provided with a first opening and a second opening adapted to the limiting port.

[0009] The mating component includes two first inclined surfaces mirror-arranged on the first limiting slider and the second limiting slider, and two second inclined surfaces arranged on the first mounting base. The high end of each first inclined surface is arranged towards the second mounting base. The two second inclined surfaces are mirror-arranged with the axis of the connecting column as the axis of symmetry, and each first inclined surface is parallel to each second inclined surface.

[0010] Specifically, when the first mounting base and the second mounting base switch to a gradually connected state, each of the first inclined surfaces and each of the second inclined surfaces gradually come into contact with each other, so that after the first limiting slider and the second limiting slider slide towards each other, the first opening, the second opening, and the limiting opening surround and form a limiting cavity for restricting the movement of the connecting column; when the first mounting base and the second mounting base switch to a gradually separated state, each of the first inclined surfaces and each of the second inclined surfaces gradually separate, so that after the first limiting slider and the second limiting slider slide away from each other, the connecting column is released.

[0011] Preferably, the limiting component further includes multiple sets of guide rods and return springs. One end of each guide rod passes through the first mounting base and is connected to the first limiting slider or the second limiting slider. The other end of each guide rod is exposed outside the first mounting base and fitted with a return spring. The two ends of the return spring abut against the first mounting base and the end of the guide rod, respectively.

[0012] Preferably, the second mounting base is slidably provided with a buffer block, the sliding direction of the buffer block is perpendicular to the sliding direction of the first limiting slider, and the connecting post is connected to the buffer block.

[0013] Preferably, the second mounting base is provided with a guide groove extending along the sliding direction of the buffer block, and the buffer block is provided with an integral guide protrusion, the guide protrusion being slidably disposed within the guide groove; and / or

[0014] A buffer spring is provided between the second mounting base and the buffer block, and the deformation direction of the buffer spring is the same as the sliding direction of the buffer block.

[0015] Preferably, the first mounting base is provided with a hook for hanging on the waler; and / or

[0016] The first mounting base is provided with a threaded hole.

[0017] Preferably, the first mounting base has a first support block and a second support block arranged in a mirror image, the cross-sections of the first support block and the second support block are both right-angled triangles, and the hypotenuses of the two are arranged opposite each other.

[0018] Preferably, reinforcing ribs are provided between the first mounting base and the first support block and / or between the first mounting base and the second support block.

[0019] On the other hand, according to embodiments of the present invention, a support device is also provided, including the aforementioned foundation pit steel support structure.

[0020] Preferably, the support device further includes a bracket for supporting the waler, the bracket comprising:

[0021] First support rod;

[0022] The second support rod is rotatably connected to the first support rod. The first support rod has a first state in which it is rotated to be perpendicular to the second support rod, and a second state in which it is rotated to be accommodated within the second support rod.

[0023] The auxiliary support includes a first auxiliary support rod and a second auxiliary support rod that are rotatably connected. The first auxiliary support rod and the second auxiliary support rod are respectively rotatably connected to the first support rod and the second support rod, so that in the first state, the first support rod, the second support rod, the first auxiliary support rod and the second auxiliary support rod are enclosed to form a triangular support structure. In the second state, the first auxiliary support rod and the second auxiliary support rod are folded and accommodated between the first support rod and the second support rod.

[0024] On the other hand, according to embodiments of the present invention, a method for supporting steel foundation pits is also provided, applicable to the aforementioned steel foundation pit support structure or the aforementioned support device, the method comprising:

[0025] When in use, fix the first mounting base to the waler, install the flexible end or fixed end of the steel pipe on the connecting column, and then hoist the steel pipe to the preset position;

[0026] As the second inclined plane gradually comes into contact with the first inclined plane, the first and second limiting sliders are pushed inward by the guidance and drive of the second inclined plane, so that the first opening, the second opening and the limiting port together wrap around the connecting column located therein, and the steel pipe is supported on the first mounting base.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The first and second mounting seats, which can be separated, are used to install on the waler and the end of the steel pipe respectively, so as to determine the installation position of each mounting seat according to the actual installation and construction requirements and reduce the offset of the steel pipe after installation.

[0029] 2. The limiting and mating parts set on the first and second mounting seats can be used together to clamp or release the connecting column, so as to limit the rotation of the steel pipe by controlling the movement range of the connecting column, thereby preventing the steel pipe from rotating after installation; and can determine the actual position of the steel pipe installation according to the position of the connecting column, reducing the frequency of repeated adjustments to the position of the steel pipe after installation.

[0030] 3. The displacement generated during the downward hoisting of the steel pipe allows the second mounting seat to move accordingly, gradually approaching the first mounting seat pre-installed on the waler. During this process, the second inclined surface moves in the same direction as the second mounting seat towards the first inclined surface, causing them to gradually approach and fit together. When the second inclined surface gradually fits into the corresponding first inclined surface, the linkage between the two inclined surfaces and the downward movement of the second mounting seat cause the first and second limiting sliders to gradually approach each other, thus bringing the first and second openings closer to the limiting port. During this process, the connecting column connected to the end of the steel pipe falls into the limiting port, and under the continuous drive of each inclined surface, the first and second limiting sliders abut against each other, forming a closed limiting cavity with the first opening, the second opening, and the limiting port. This cavity is used to clamp the connecting column located therein, limiting the connecting column in both axial and radial directions within the limiting port. This prevents the steel pipe from rotating radially by positioning the connecting column. The inner wall of the limiting cavity and the outer surface of the connecting column have friction to prevent relative rotation between them.

[0031] 4. After construction, the steel pipe is hoisted upward to gradually separate the first mounting seat from the second mounting seat, thereby gradually separating the first inclined surface from the second inclined surface. This allows the first and second limiting sliders to slide in opposite directions, opening the closed limiting cavity and allowing the connecting column to be hoisted up along with the steel pipe. After construction is completed, the first and second mounting seats can be disassembled and reused.

[0032] 5. When hoisting the steel pipe, the position of the connecting column is changed to determine the initial installation position of the steel pipe. Since the connecting column can be confined within the limiting cavity, it is only necessary to determine the position of the limiting port and use hoisting to guide the connecting column into the limiting cavity to determine the final installation position of the steel pipe. There is no need to repeatedly adjust the posture of the steel pipe, which reduces construction procedures, lowers construction difficulty, and improves construction efficiency. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the support device according to an embodiment of the present invention;

[0034] Figure 2 This is a partial structural schematic diagram of the support device in one embodiment of the present invention;

[0035] Figure 3This is a schematic diagram of the structure of the first mounting base in one embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of the second mounting base in one embodiment of the present invention;

[0037] Figure 5 for Figure 4 Sectional view along line AA;

[0038] Figure 6 This is a schematic diagram of the structure of the bracket in one embodiment of the present invention.

[0039] In the above attached figures:

[0040] 1. Waler; 2. Steel pipe; 3. First mounting base; 4. Second mounting base; 5. Connecting column; 6. Limiting port; 7. First limiting slider; 8. Second limiting slider; 9. First opening; 10. Second opening; 11. First inclined surface; 12. Second inclined surface; 13. Guide rod; 14. Return spring; 15. Buffer block; 16. Guide groove; 17. Guide protrusion; 18. Buffer spring; 19. Hook; 20. First support block; 21. Second support block; 22. Reinforcing rib; 23. First support rod; 24. Second support rod; 25. First auxiliary support rod; 26. Second auxiliary support rod. Detailed Implementation

[0041] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] In embodiments of the present invention, such as Figures 1-5 As shown, the foundation pit steel support structure includes a first mounting base 3, installed on the waler; a second mounting base 4, detachably disposed on the first mounting base 3, the second mounting base 4 having a connecting column 5 for connecting the flexible end or fixed end of the steel pipe; a limiting component, including a limiting port 6 disposed on the first mounting base 3, and a first limiting slider 7 and a second limiting slider 8 arranged in a mirror image with the central axis of the limiting port 6 as the axis of symmetry, the first limiting slider 7 and the second limiting slider 8 being slidably disposed on the first mounting base 3 facing each other or away from each other, and respectively having a first opening 9 and a second opening 10 adapted to the limiting port 6; a mating component, including two first inclined surfaces 11 arranged in a mirror image on the first limiting slider 7 and the second limiting slider 8, and two second inclined surfaces 12 disposed on the first mounting base 3, the high end of each first inclined surface 11 being disposed towards the second mounting base 4, the two second inclined surfaces 12 being arranged in a mirror image with the axis of symmetry of the connecting column 5, and each first inclined surface 11 and each second inclined surface 12 being parallel;

[0043] When the first mounting base 3 and the second mounting base 4 switch to a gradually connected state, each of the first inclined surfaces 11 and each of the second inclined surfaces 12 gradually come into contact, so that after the first limiting slider 7 and the second limiting slider 8 slide towards each other, the first opening 9, the second opening 10 and the limiting opening 6 enclose and form a limiting cavity for restricting the movement of the connecting post 5; when the first mounting base 3 and the second mounting base 4 switch to a gradually separated state, each of the first inclined surfaces 11 and each of the second inclined surfaces 12 gradually separate, so that after the first limiting slider 7 and the second limiting slider 8 slide away from each other, the connecting post 5 is released.

[0044] Specifically, in this embodiment of the invention, the walers are installed on the inner wall of the foundation pit, and the gap between them and the wall is filled with concrete. The two ends of the steel pipe are installed on a set of alternately arranged walers using a support structure. Specifically, the ends of the steel pipe are movable ends and / or fixed ends. After the jack applies pressure, the movable end moves and inserts the stopper into the cavity to fix the steel pipe. Conversely, after the jack applies pressure again, the stopper is slowly removed and gradually removed. During this process, the support structure supports the weight of the steel pipe. After the movable end is completely removed, the dismantling and hoisting work can begin.

[0045] In this embodiment of the invention, in order to improve the reusability of the support structure, a separable first mounting seat 3 and a second mounting seat 4 are provided. The first mounting seat 3 is detachably installed on the waler so that it can be quickly disassembled and reused after construction is completed; and the actual position of the first mounting seat 3 can be determined or adjusted according to the installation position of the steel pipe to reduce the scrap rate of the first mounting seat 3; the second mounting seat 4 is connected to the end of the steel pipe through a connecting column 5 (if the connecting column 5 is connected to the movable end, the connecting column 5 is a telescopic column so that it can extend and retract with the movement of the movable end; otherwise, if the connecting column 5 is connected to the fixed end, the connecting column 5 is a columnar structure and only serves the function of connection and installation). The steel pipe is placed at the second mounting seat 4 so that the second mounting seat 4 moves synchronously with the steel pipe when it is hoisted.

[0046] In this embodiment of the invention, matching limiting components and fitting components are provided to determine the actual installation position of the steel pipe by limiting the connecting column 5, without the need for readjustment of the installed steel pipe. Specifically, the limiting component includes a limiting port 6 provided on the first mounting base 3, and a first limiting slider 7 and a second limiting slider 8 located on both sides of the limiting port 6. The fitting component includes two first inclined surfaces 11 respectively provided on the first limiting slider 7 and the second limiting slider 8, and two second inclined surfaces 12 provided on the second mounting base 4. The limiting port 6 has a semi-circular cross section to accommodate part of the connecting column 5. The first limiting slider 7 and the second limiting slider 8 are both slidably disposed on the first mounting base 3, sliding towards or away from each other. In order to drive the first limiting slider 7 and the second limiting slider 8 to slide, the two first inclined surfaces 11 are mirror images of each other and are both inclined upwards. The two second inclined surfaces 12 are provided on both sides of the connecting rod, and the first inclined surfaces 11 and the second inclined surfaces 12 on the same side are parallel.

[0047] Thus, as the second mounting base 4 gradually moves downward with the steel pipe, it gradually approaches the first mounting base 3, causing the first inclined surface 11 and the second inclined surface 12 on the same side to gradually approach each other (the following explanation uses the first inclined surface 11 and the second inclined surface 12 on the same side as an example). The second inclined surface 12 falls with the steel pipe until its lower end contacts the upper end of the first inclined surface 11. During the continuous downward movement, it can move the first limiting slider 7 or the second limiting slider 8 through the sliding cooperation between the first inclined surface 11 and the second inclined surface 12. During this process, a connecting post 5 is set between the two second inclined surfaces 12 and is located at the lower part of the second mounting base 4. Therefore, the connecting post 5 will... First, it falls into the limiting port 6, and during the opposing movement of the first limiting slider 7 and the second limiting slider 8, the first opening 9 and the second opening 10 on them close the other part of the connecting column 5. Thus, with the cooperation of the first opening 9, the second opening 10 and the limiting port 6, the outer surface of the connecting column 5 is completely wrapped and limited to prevent the connecting column 5 from rotating. In this process, as long as the position of the limiting port 6 is determined when the first mounting seat 3 is initially installed, the position of the connecting column 5 that falls into the limiting port 6 can be determined. Then, the actual installation position of the steel pipe can be determined by the position of the connecting column 5, preventing the steel pipe from having a large offset after installation due to different hoisting postures.

[0048] Conversely, when the steel pipe is unloaded, the upward hoisting of the steel pipe causes the second mounting seat 4 to gradually separate from the first mounting seat 3. During this process, the first inclined surface 11 and the second inclined surface 12 remain in sliding contact until the two mounting seats are completely separated. Under the action of each inclined surface, the first limiting slider 7 and the second limiting slider 8 can move in opposite directions to release the connecting column 5, thereby allowing the connecting column 5 to be moved out along with the steel pipe.

[0049] This invention utilizes the movement of the steel pipe during hoisting, along with the coordinated use of limiting and fitting components. The position of the connecting column 5 is determined by the limiting fit between the connecting column 5 and the limiting port 6, and by the release of the limiting fit. This position of the connecting column 5 determines the position of the steel pipe. Compared to the traditional direct hoisting method, this reduces the need for repeated adjustments to the steel pipe's posture after placement. The pipe can be positioned in one go after hoisting. Only the position of the limiting port 6 needs to be determined when installing the first mounting base 3. By restricting the movement of the connecting column 5, the final position of the steel pipe is ensured. The steel pipe has minimal offset after installation, minimizing the need for further adjustments, thus reducing construction steps, lowering construction difficulty, and improving construction efficiency. Furthermore, since the connecting column 5 is confined within the limiting port 6, the inner wall of the limiting port 6 can fit against the outer surface of the connecting column 5, generating friction that also fixes the connecting column 5, preventing radial rotation and / or axial movement. Additionally, one end of the connecting column 5 can abut against the first mounting base 3 for axial positioning.

[0050] Reference Figure 2 , Figure 3 As shown, in one embodiment, the limiting member further includes multiple sets of guide rods 13 and return springs 14. One end of each guide rod 13 passes through the first mounting base 3 and is connected to the first limiting slider 7 or the second limiting slider 8. The other end of the guide rod 13 is exposed outside the first mounting base 3 and fitted with a return spring 14. The two ends of the return spring 14 abut against the ends of the first mounting base 3 and the guide rod 13, respectively. Specifically, to enable the first limiting slider 7 and the second limiting slider 8 to slide towards each other, each limiting slider is provided with a guide rod 13. One end of the guide rod 13 passes through the first mounting base 3 and is connected to the first limiting slider 7 or the second limiting slider 8, while the outer surface of the other end is fitted with a return spring 14. The two ends of the return spring 14 are respectively fixed to the first mounting base 3 and the end of the guide rod 13. Thus, with the cooperation of the first inclined surface 11 and the second inclined surface 12, the first limiting slider 7 and the second limiting slider 8 are slid towards each other, and the return spring 14 is in a stretched state. When the external force acting on the first limiting slider 7 and the second limiting slider 8 disappears, the return spring 14 returns to its deformation and causes the first limiting slider 7 and the second limiting slider 8 to slide away from each other. Of course, in order to maintain the stability of the first limiting slider 7 and the second limiting slider 8 during movement, each limiting slider is provided with two guide rods 13 arranged at intervals. The guide rods 13 are in clearance fit with the first mounting base 3, so that the guide rods 13 can move together with the corresponding limiting slider.

[0051] Reference Figure 4 , Figure 5As shown, in one embodiment, the second mounting base 4 is slidably provided with a buffer block 15, the sliding direction of which is perpendicular to the sliding direction of the first limiting slider 7, and the connecting column 5 is connected to the buffer block 15. Specifically, when the connecting column 5 is located within the limiting port 6, the first mounting base 3 can provide an upward force to the connecting column 5, while a downward force is generated during the hoisting process. In order to reduce the impact force on the second mounting base 4, a slidable buffer block 15 is provided in the second mounting base 4. The buffer block 15 can slide vertically and is connected to the connecting column 5. When the second mounting base 4 is not in contact with the first mounting base 3, the buffer block 15 remains stationary under the weight of the connecting column 5 and the steel pipe; conversely, when the two mounting bases are in contact, the buffer block 15 gradually slides upward.

[0052] Furthermore, in order to limit the sliding distance of the buffer block 15, the second mounting base 4 is provided with a guide groove 16 extending along the sliding direction of the buffer block 15, and the buffer block 15 is provided with an integral guide protrusion 17, which is slidably disposed in the guide groove 16; of course, in order to further reduce vibration, a buffer spring 18 is provided between the second mounting base 4 and the buffer block 15, and the deformation direction of the buffer spring 18 is the same as the sliding direction of the buffer block 15.

[0053] Reference Figure 2 , Figure 3 As shown, in one embodiment, the first mounting base 3 is provided with a hook 19 for hanging on the waler. Specifically, in order to detachably install the first mounting base 3 on the waler, a hook 19 is provided on the first mounting base 3. The hook 19 can be integrally formed with the first mounting base 3 or it can be a separate structure for hanging on the waler. This replaces the traditional pre-embedded method, reduces the scrap rate of the first mounting base 3, and allows for adjustment of the installation position of the first mounting base 3 and easy reuse. It can be understood that in this embodiment, in addition to hanging on the waler in the form of a hook 19, fasteners or threaded holes in the first mounting base 3 for screws can also be used to detachably connect the first mounting base 3 and the waler.

[0054] Reference Figure 2 , Figure 3As shown, in one embodiment, the first mounting base 3 has a first support block 20 and a second support block 21 arranged in a mirror image. The cross-sections of the first support block 20 and the second support block 21 are both right-angled triangles, and their hypotenuses are arranged opposite each other. Specifically, in order to further support the steel pipe and / or the end of the steel pipe, the first mounting base 3 has a first support block 20 and a second support block 21 arranged in a mirror image to keep the steel pipe on it horizontal and prevent it from being detached from the support structure due to uneven force. In this embodiment, the cross-sections of the first support block 20 and the second support block 21 are both right-angled triangles, and their hypotenuses are arranged opposite each other. In this way, not only can an upward support force be provided, but the hypotenuses of each support block can make way for the steel pipe and / or the end of the steel pipe. Compared with a flat support plate, it is easier to put on and take off the jack, and it is also easier to observe the position and status of the connecting column 5. It is also used to avoid the connecting column 5.

[0055] Reference Figure 3 As shown, in one embodiment, reinforcing ribs 22 are provided between the first mounting base 3 and the first support block 20, and between the first mounting base 3 and the second support block 21. Specifically, in order to strengthen the connection between each support block and the first mounting base 3 and prevent breakage, reinforcing ribs 22 are provided between them.

[0056] This embodiment also provides a support device, including the steel support structure described above. The specific structure of the steel support structure is as described in the above embodiment. Since this support device adopts all the technical solutions of the above embodiments, it has at least the technical solutions of the above embodiments.

[0057] Reference Figure 1 , Figure 2 and Figure 6 As shown, in one embodiment, the support device further includes a bracket for supporting the waler, the bracket including: a first support rod 23; a second support rod 24 rotatably connected to the first support rod 23, the first support rod 23 having a first state where it is rotated to be perpendicular to the second support rod 24, and a second state where it is rotated to be accommodated within the second support rod 24; and an auxiliary support member including a first auxiliary support rod 25 and a second auxiliary support rod 26 rotatably connected, the first auxiliary support rod 25 and the second auxiliary support rod 26 being rotatably connected to the first support rod 23 and the second support rod 24 respectively, so that in the first state, the first support rod 23, the second support rod 24, the first auxiliary support rod 25 and the second auxiliary support rod 26 are arranged to form a triangular support structure, and in the second state, the first auxiliary support rod 25 and the second auxiliary support rod 26 are folded and accommodated between the first support rod 23 and the second support rod 24.

[0058] To further improve the stability of this support device, a bracket is installed to support the waler; specifically, for ease of storage and reuse of the bracket, refer to... Figure 6 As shown, the bracket includes a first support rod 23 and a second support rod 24 rotatably connected at one end. The rotation angle of the first support rod 23 and the second support rod 24 is 0°-90°. When the second support rod 24 rotates 90°, the first support rod 23 and the second support rod 24 are perpendicular to each other, and the first support rod 23 is used to fix it to the wall, while the second support rod 24 is used to support the waler. When the second support rod 24 rotates 0°, it can be accommodated in the cavity of the first support rod 23, serving a storage function. To strengthen the connection structure between the two support rods, a spacer is placed between the two support rods. The system is equipped with a first auxiliary support rod 25 and a second auxiliary support rod 26 that rotate in opposite directions. When the first auxiliary support rod 25 and the second auxiliary support rod 26 rotate to be collinear, they not only connect the first support rod 23 and the second support rod 24, but also form a stable triangular support structure with the first support rod 23 and the second support rod 24 to improve the overall stability of the support. Conversely, when the first auxiliary support rod 25 and the second auxiliary support rod 26 rotate to overlap, the two auxiliary support rods are stored between the first support rod 23 and the second support rod 24 for easy storage.

[0059] Of course, to improve the stability of this bracket when supporting the waler, screws are installed at each rotation point. Loosen the screws when rotating and tighten them when fixing. To secure the waler and / or steel pipe, several turnbuckles are installed for hanging it on the wall.

[0060] On the other hand, according to embodiments of the present invention, a method for supporting steel foundation pits is also provided, applicable to the aforementioned steel foundation pit support structure or the aforementioned support device, the method comprising:

[0061] In use, the first mounting base 3 is fixed to the waler, and the flexible end or fixed end of the steel pipe is installed on the connecting column 5. Then the steel pipe is hoisted to the preset position.

[0062] When the second inclined surface 12 gradually comes into contact with the first inclined surface 11, the first limiting slider 7 and the second limiting slider 8 are pushed inward by the guidance and drive of the second inclined surface 12, so that the first opening 9, the second opening 10 and the limiting opening 6 together wrap around the connecting column 5 located therebetween, and the steel pipe is supported on the first mounting base 3.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A steel support structure for a foundation pit, used to connect a waler and a steel pipe, and to support the steel pipe, wherein the steel pipe has a movable end and a fixed end arranged opposite to each other, characterized in that, The foundation pit steel support structure includes: The first mounting base is installed on the waler; The second mounting base is detachably disposed from the first mounting base. The second mounting base is provided with a connecting post for connecting the flexible end or the fixed end of the steel pipe. The limiting component includes a limiting port provided on the first mounting base, and a first limiting slider and a second limiting slider arranged in a mirror image with the central axis of the limiting port as the axis of symmetry. The first limiting slider and the second limiting slider are slidably disposed on the first mounting base facing each other or back to back, and are respectively provided with a first opening and a second opening adapted to the limiting port. The mating component includes two first inclined surfaces mirror-arranged on the first limiting slider and the second limiting slider, and two second inclined surfaces arranged on the first mounting base. The high end of each first inclined surface is arranged towards the second mounting base. The two second inclined surfaces are mirror-arranged with the axis of the connecting column as the axis of symmetry, and each first inclined surface is parallel to each second inclined surface. Specifically, when the first mounting base and the second mounting base switch to a gradually connected state, each of the first inclined surfaces and each of the second inclined surfaces gradually come into contact with each other, so that after the first limiting slider and the second limiting slider slide towards each other, the first opening, the second opening, and the limiting opening surround and form a limiting cavity for restricting the movement of the connecting column; when the first mounting base and the second mounting base switch to a gradually separated state, each of the first inclined surfaces and each of the second inclined surfaces gradually separate, so that after the first limiting slider and the second limiting slider slide away from each other, the connecting column is released.

2. The foundation pit steel support structure as described in claim 1, characterized in that, The limiting component also includes multiple sets of guide rods and return springs. One end of each guide rod passes through the first mounting base and is connected to the first limiting slider or the second limiting slider. The other end of each guide rod is exposed outside the first mounting base and fitted with a return spring. The two ends of the return spring abut against the first mounting base and the end of the guide rod, respectively.

3. A foundation pit steel support structure as described in claim 1 or 2, characterized in that, The second mounting base is slidably provided with a buffer block, the sliding direction of which is perpendicular to the sliding direction of the first limiting slider, and the connecting post is connected to the buffer block.

4. The foundation pit steel support structure as described in claim 3, characterized in that, The second mounting base is provided with a guide groove extending along the sliding direction of the buffer block, and the buffer block is provided with an integral guide protrusion, the guide protrusion being slidably disposed within the guide groove; and / or A buffer spring is provided between the second mounting base and the buffer block, and the deformation direction of the buffer spring is the same as the sliding direction of the buffer block.

5. A foundation pit steel support structure as described in claim 1, characterized in that, The first mounting base is provided with a hook for hanging on the waler; and / or The first mounting base is provided with a threaded hole.

6. The foundation pit steel support structure as described in claim 1, characterized in that, The first mounting base has a first support block and a second support block arranged in a mirror image. The cross-sections of the first support block and the second support block are both right-angled triangles, and their hypotenuses are arranged opposite each other.

7. A foundation pit steel support structure as described in claim 6, characterized in that, Reinforcing ribs are provided between the first mounting base and the first support block and / or between the first mounting base and the second support block.

8. A support device, characterized in that, Includes the foundation pit steel support structure as described in any one of claims 1-7.

9. A support device as described in claim 8, characterized in that, The support device further includes a bracket for supporting the waler, the bracket comprising: First support rod; The second support rod is rotatably connected to the first support rod. The first support rod has a first state in which it is rotated to be perpendicular to the second support rod, and a second state in which it is rotated to be accommodated within the second support rod. The auxiliary support includes a first auxiliary support rod and a second auxiliary support rod that are rotatably connected. The first auxiliary support rod and the second auxiliary support rod are respectively rotatably connected to the first support rod and the second support rod, so that in the first state, the first support rod, the second support rod, the first auxiliary support rod and the second auxiliary support rod are enclosed to form a triangular support structure. In the second state, the first auxiliary support rod and the second auxiliary support rod are folded and accommodated between the first support rod and the second support rod.

10. A method for steel support of a foundation pit, characterized in that, The foundation pit steel support method, applied to the foundation pit steel support structure as described in any one of claims 1-7 or to the support device as described in any one of claims 8-9, comprises: When in use, fix the first mounting base to the waler, install the flexible end or fixed end of the steel pipe on the connecting column, and then hoist the steel pipe to the preset position; As the second inclined plane gradually comes into contact with the first inclined plane, the first and second limiting sliders are pushed inward by the guidance and drive of the second inclined plane, so that the first opening, the second opening and the limiting port together wrap around the connecting column located therein, and the steel pipe is supported on the first mounting base.

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