A kind of inclined bracing support structure of steel lattice column of deep foundation pit near subway

Abstract

The utility model relates to the technical field of support structure discloses a kind of subway deep foundation pit steel lattice column inclined bracing support structure, including support pile, steel structure column inclined bracing support platform, support pile is connected with steel structure column inclined bracing support platform between by multiple length adjustable steel lattice column inclined bracing mechanism;Support pile and steel structure column inclined bracing support platform are all fixed with multiple quick connecting mechanisms, and the both ends of each steel lattice column inclined bracing mechanism are connected with corresponding support pile, steel structure column inclined bracing support platform by two quick connecting mechanisms simultaneously connected therewith to realize connection.The utility model can adjust the total length of steel lattice column inclined bracing mechanism, so it can be applicable to the different distance between support pile and steel structure column inclined bracing support platform, without replacement adjustment, improve the use flexibility, and can be aided by quick connecting mechanism to quickly complete the installation fixed connection between steel lattice column inclined bracing mechanism and support pile and steel structure column inclined bracing support platform, convenient personnel operation.

Description

Technical Field

[0001] This utility model relates to the field of support structure technology, and more specifically, to a steel lattice column inclined bracing support structure for deep foundation pits near subway stations. Background Technology

[0002] Currently, most foundation pit support structures use reinforced concrete cast-in-place piles, which already provide a certain level of safety. However, for some projects located near subway protection zones, further reinforcement is needed to enhance the safety and stability of the support system.

[0003] Utility model patent CN202322075714.6 discloses a steel lattice column inclined bracing support structure for deep foundation pits near subway stations. The structure includes support piles and a steel lattice column foundation platform. A capping beam is installed at the upper end of each support pile, and a dewatering well is located on the inward-facing side of each support pile. The steel lattice column foundation platform is located on the inward-facing side of the dewatering well. The support piles and the steel lattice column foundation platform are fixedly connected by multiple steel lattice inclined braces. This device eliminates the need to wait for concrete strength; the next step of earthwork excavation can proceed directly after the steel lattice inclined braces are installed, effectively shortening the construction period for this area. Furthermore, using the steel lattice inclined braces as the main support reduces the number of sections where the support structure penetrates the basement structure, thereby lowering the probability of basement leakage.

[0004] The steel lattice column inclined bracing support structure for deep foundation pits near subway lines disclosed in the above patents can provide effective support through the combination of support piles, steel lattice column foundation caps, and steel lattice inclined bracing. However, it still has the following shortcomings: 1. The length of the steel lattice inclined bracing is fixed and cannot be flexibly adjusted according to usage needs. After the support piles and steel lattice column foundation caps are constructed, if there is a difference between the distance between the support piles and the steel lattice column foundation caps and the steel lattice inclined bracing, the connection and fixation cannot be completed, and different steel lattice inclined bracings need to be replaced, resulting in low flexibility of use; 2. The steel lattice inclined bracing is fixed to the support piles and steel lattice column foundation caps by welding, which has low fixing efficiency.

[0005] In light of the above, an improved steel lattice column diagonal bracing structure for deep foundation pits near subway stations is proposed to solve the aforementioned technical problems. Utility Model Content

[0006] In view of this, this utility model proposes a steel lattice column diagonal bracing support structure for deep foundation pits near subway lines, the specific technical solution of which is as follows:

[0007] A steel lattice column inclined bracing support structure for deep foundation pits near subway stations includes support piles and steel structure column inclined bracing platforms. Multiple steel structure column inclined bracing columns are fixedly connected to the bottom of the steel structure column inclined bracing platforms. The support pile on the right side is connected to the steel structure column inclined bracing platform on the left side via multiple steel lattice column inclined bracing mechanisms of adjustable length. These mechanisms are divided into upper and lower groups according to their installation height, with several mechanisms arranged side-by-side in each group. The right end of each steel lattice column inclined bracing mechanism is higher than its left end. Multiple quick-connect mechanisms are fixedly connected to the left side wall of the support pile, the top surface of the steel structure column inclined bracing platform, and the right side wall. Each steel lattice column inclined bracing mechanism is connected to its corresponding support pile and steel structure column inclined bracing platform via two quick-connect mechanisms simultaneously connected to it.

[0008] This utility model can adjust the total length of the steel lattice column bracing mechanism according to the distance between the support pile and the steel structure column bracing platform, so that it can be used for different distances between the support pile and the steel structure column bracing platform without replacement or adjustment, thus improving the flexibility of use. In addition, the quick connection mechanism can quickly complete the installation and fixing connection between the steel lattice column bracing mechanism and the support pile and the steel structure column bracing platform, which is convenient for personnel operation.

[0009] Preferably, the quick-connect mechanism includes a mounting base with an inclined top, which is fixed to the corresponding position of the support pile or the steel structure column diagonal brace platform; the mounting base has a rectangular slot with an open top, and a locking block is movably mounted in the rectangular slot, the top of which is fixed to the corresponding position of the bottom end of the steel lattice column diagonal brace mechanism; a pressing hole with a figure-eight shaped opening is opened on the side of the locking block away from the steel lattice column diagonal brace mechanism, and an inverted V-shaped inner groove extending in the front-back direction is opened on the top inner wall of the pressing hole; an inverted V-shaped plate is fixedly installed in the rectangular slot, and the V-shaped plate can pass through the figure-eight shaped opening and be movably embedded into the inverted V-shaped inner groove, the widest part of the V-shaped plate being laterally spaced... The diameter is smaller than the minimum diameter of the corresponding figure-eight structure opening at the bottom of the extrusion hole; an arc-shaped elastic limiting plate is provided below the V-shaped plate, and an inverted T-shaped screw is rotatably installed at the bottom of the arc-shaped elastic limiting plate. The bottom of the T-shaped screw extends downward to the outer side of the corresponding mounting base. The bottom of the mounting base has a through hole communicating with the rectangular slot. The T-shaped screw is threaded into the through hole and can move up and down in the rectangular slot by its own rotation; after the arc-shaped elastic limiting plate is squeezed and contracted into the rectangular slot at the figure-eight structure opening of the extrusion hole, the arc-shaped elastic limiting plate rebounds and its bottom two sides are in active contact with the inner wall of the bottom of the corresponding extrusion hole; the V-shaped plate can squeeze and contract the arc-shaped elastic limiting plate after it has moved upward.

[0010] Preferably, a threaded sleeve is embedded and fixed inside the through hole, and the T-shaped screw passes through the threaded sleeve and is threadedly connected to the threaded sleeve.

[0011] Preferably, a bearing sleeve is embedded and fixed at the center of the bottom surface of the arc-shaped elastic limiting plate, and a first bearing is fixed inside the bearing sleeve. The inner side of the inner ring of the first bearing is fixedly connected to the outer side of the upper end of the corresponding T-shaped screw. The T-shaped screw is rotatably mounted at the center of the bottom surface of the arc-shaped elastic limiting plate through the first bearing.

[0012] Preferably, the front and rear sides of the arc-shaped elastic limiting plate are in movable contact with the front and rear inner walls of the corresponding rectangular slot, respectively. The arc-shaped elastic limiting plate is restricted and guided by the front and rear inner walls of the rectangular slot, so that the arc-shaped elastic limiting plate can only move up and down.

[0013] Preferably, the front and rear sides of the V-shaped plate are fixedly connected to the inner wall of the corresponding rectangular slot.

[0014] Preferably, the distance between the bottom inner wall of the T-shaped screw and the corresponding mounting base is greater than the distance between the top of the arc-shaped elastic limiting plate and the top inner wall of the V-shaped plate.

[0015] Preferably, the steel lattice column diagonal bracing mechanism includes a first steel lattice column diagonal brace and a second steel lattice column diagonal brace connected to each other. The lower left end of the first steel lattice column diagonal brace is connected to the steel structure column diagonal brace support platform, and the upper right end of the second steel lattice column diagonal brace is connected to the support pile. A U-shaped frame is fixedly connected to the lower left end of the second steel lattice column diagonal brace. A threaded hole is coaxially opened on the right side inside the first steel lattice column diagonal brace. A diagonal bracing screw is threadedly connected to the corresponding threaded hole. The right end of the diagonal bracing screw extends upward and to the right and is rotated to insert into the corresponding U-shaped frame. At the same time, the right end of the diagonal bracing screw is fixedly connected to a knob located in the corresponding U-shaped frame.

[0016] Preferably, the bottom left end of the first steel lattice column diagonal brace is fixedly connected to the top of the corresponding quick-connect mechanism's locking block and makes movable contact with the top inclined surface of the corresponding mounting base; the bottom right end of the second steel lattice column diagonal brace is fixedly connected to the top of the corresponding quick-connect mechanism's locking block and makes movable contact with the top inclined surface of the corresponding mounting base.

[0017] Preferably, a second bearing is installed in the rotating hole on the U-shaped frame through which the diagonal bracing screw passes, the outer side of the diagonal bracing screw is fixedly connected to the inner side of the inner ring of the second bearing, and the diagonal bracing screw is rotatably mounted on the U-shaped frame through the second bearing.

[0018] Compared with existing technologies, the steel lattice column inclined bracing support structure for deep foundation pits near subway lines of this utility model has the following beneficial effects:

[0019] (1) By setting up a length-adjustable steel lattice column inclined bracing mechanism, the total length of the steel lattice column inclined bracing mechanism can be adjusted by rotating the inclined bracing screw according to the distance between the support pile and the steel structure column inclined bracing platform. This makes it suitable for different distances between the support pile and the steel structure column inclined bracing platform, without the need to replace or adjust different steel lattice column inclined bracing mechanisms, thus improving the flexibility of use.

[0020] (2) By setting up a quick connection mechanism, this utility model can quickly realize the installation and fixed connection between the steel lattice column bracing mechanism and the support pile and the steel structure column bracing platform by simply pressing, which is convenient for personnel to operate and is also convenient for subsequent disassembly. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of a steel lattice column inclined bracing support structure for a deep foundation pit near a subway station, according to this utility model. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the overall structure of a steel lattice column inclined bracing support structure for a deep foundation pit near a subway station, according to this utility model. Figure 2 .

[0024] Figure 3 This is a cross-sectional view of a steel lattice column inclined bracing support structure for a deep foundation pit near a subway station, according to this utility model.

[0025] Figure 4 for Figure 3 A magnified structural diagram of part A in the middle.

[0026] In the diagram: 1-Support pile, 2-Steel structure column diagonal brace bearing platform, 3-Steel structure column diagonal brace bearing column, 4-Steel lattice column diagonal brace mechanism, 401-First steel lattice column diagonal brace, 402-Second steel lattice column diagonal brace, 403-U-shaped frame, 404-Diagonal brace screw, 405-Knob, 406-Second bearing, 5-Quick connection mechanism, 501-Mounting base, 502-Clip block, 503-Extrusion hole, 504-Figure-eight structure opening, 505-Inverted V-shaped inner groove, 506-V-shaped plate, 507-Arc-shaped elastic limiting plate, 508-T-shaped screw, 509-Threaded sleeve, 510-Rectangular slot, 511-First bearing. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] Example:

[0031] See Figures 1-2 This embodiment provides a steel lattice column inclined support structure for deep foundation pits near subway lines, including support piles 1, steel structure column inclined support platform 2, and multiple steel structure column inclined support columns 3 fixedly connected to the bottom of the steel structure column inclined support platform 2. The multiple steel structure column inclined support columns 3 are used to support the steel structure column inclined support platform 2.

[0032] The support pile 1 on the right side and the steel structure column inclined support platform 2 on the left side are connected by multiple steel lattice column inclined support mechanisms 4 with adjustable length. The multiple steel lattice column inclined support mechanisms 4 are divided into upper and lower inclined support mechanism groups according to the installation height. Several steel lattice column inclined support mechanisms in each inclined support mechanism group are arranged side by side. The right end of the steel lattice column inclined support mechanism 4 is higher than the left end. Multiple quick connection mechanisms 5 are fixed to the left side wall of the support pile 1 and the top surface and right side wall of the steel structure column inclined support platform 2. The two ends of each steel lattice column inclined support mechanism 4 are connected to the corresponding support pile 1 and steel structure column inclined support platform 2 through two quick connection mechanisms 5 connected to it at the same time.

[0033] In a further specific embodiment, see [link to relevant documentation]. Figure 3 , Figure 4The quick-connect mechanism 5 includes a mounting base 501 with an inclined top surface, which is fixed to the corresponding position of the support pile 1 or the steel structure column inclined support platform 2. A rectangular slot 510 with an open top is provided on the mounting base 501. A locking block 502 is movably mounted in the rectangular slot 510, and the top of the locking block 502 is fixed to the corresponding position of the bottom end of the steel lattice column inclined support mechanism 4. A pressing hole 503 with a figure-eight shaped opening 504 is provided on the side of the locking block 502 away from the steel lattice column inclined support mechanism 4. An inverted V-shaped groove 505 extending in the front-back direction is provided on the inner wall of the top of the pressing hole 503. An inverted V-shaped plate 506 is fixedly installed in the rectangular slot 510. The V-shaped plate 506 can pass through the figure-eight shaped opening 504 and be movably embedded into the inverted V-shaped groove 505. The lateral distance at the widest point of the V-shaped plate is smaller than the corresponding figure-eight shaped opening at the bottom of the pressing hole. The smallest diameter in the opening 504; an arc-shaped elastic limiting plate 507 is provided below the V-shaped plate 506, and an inverted T-shaped screw 508 is rotatably installed at the bottom of the arc-shaped elastic limiting plate 507. The bottom of the T-shaped screw 508 extends downward to the outside of the corresponding mounting base 501. The bottom of the mounting base 501 has a through hole that connects to the rectangular slot 510. The T-shaped screw 508 is threaded into the through hole and can move up and down in the rectangular slot 510 by rotating itself; after the arc-shaped elastic limiting plate 507 is squeezed and contracted into the rectangular slot 510 at the figure-eight structure opening 504 of the extrusion hole 503, the arc-shaped elastic limiting plate 507 rebounds to restrict the corresponding locking block 502 in the vertical direction, and both sides of the bottom of the arc-shaped elastic limiting plate 507 are in active contact with the bottom inner wall of the corresponding extrusion hole; the V-shaped plate 506 can squeeze and contract the arc-shaped elastic limiting plate 507 after it moves upward.

[0034] Furthermore, a threaded sleeve 509 is embedded and fixed inside the through hole, and a T-shaped screw 508 passes through the threaded sleeve 509 and is threadedly connected to the threaded sleeve 509. This threaded connection allows the T-shaped screw 508 to move up and down while rotating.

[0035] Furthermore, a bearing sleeve is embedded and fixed at the center of the bottom surface of the arc-shaped elastic limiting plate 507, and a first bearing 511 is fixed inside the bearing sleeve. The inner side of the inner ring of the first bearing 511 is fixedly connected to the outer side of the upper end of the corresponding T-shaped screw 508. The T-shaped screw 508 is rotatably mounted at the center of the bottom surface of the arc-shaped elastic limiting plate 507 through the first bearing 511.

[0036] At the same time, the front and rear sides of the arc-shaped elastic limiting plate 507 are in active contact with the front and rear inner walls of the corresponding rectangular slot 510, respectively. The arc-shaped elastic limiting plate 507 is restricted and guided by the front and rear inner walls of the rectangular slot, so that the arc-shaped elastic limiting plate 507 can only move up and down and will not rotate.

[0037] In this embodiment, the front and rear sides of the V-shaped plate 506 are fixedly connected to the inner wall of the corresponding rectangular slot.

[0038] In addition, the distance between the bottom inner wall of the T-shaped screw 508 and the corresponding mounting base is greater than the distance between the top of the arc-shaped elastic limiting plate 507 and the top inner wall of the V-shaped plate 506, so that the T-shaped screw 508 can drive the arc-shaped elastic limiting plate 507 into the groove of the V-shaped plate 506, and the V-shaped plate 506 can squeeze the arc-shaped elastic limiting plate 507 and shrink it.

[0039] In a further specific embodiment, see [link to relevant documentation]. Figure 3 The steel lattice column diagonal bracing mechanism 4 includes a first steel lattice column diagonal bracing 401 and a second steel lattice column diagonal bracing 402 connected to each other. The lower left end of the first steel lattice column diagonal bracing 401 is connected to the steel structure column diagonal bracing support 2, and the upper right end of the second steel lattice column diagonal bracing 402 is connected to the support pile 1. A U-shaped frame 403 is fixedly connected to the lower left end of the second steel lattice column diagonal bracing 402. A threaded hole is coaxially opened on the right side inside the first steel lattice column diagonal bracing 401. A diagonal bracing screw 404 is threadedly connected to the corresponding threaded hole. The right end of the diagonal bracing screw 404 extends to the upper right and rotates to insert into the corresponding U-shaped frame 403. At the same time, the right end of the diagonal bracing screw 404 is fixedly connected to a knob 405 located in the corresponding U-shaped frame 403.

[0040] The threaded connection of the diagonal brace screw 404 allows the first steel lattice column diagonal brace 401 to move in position while the diagonal brace screw 404 rotates, thereby adjusting the overall length of the steel lattice column diagonal brace mechanism.

[0041] In this embodiment, the bottom left side of the first steel lattice column diagonal brace 401 is fixedly connected to the top of the corresponding quick connection mechanism 5, and is in movable contact with the top inclined surface of the corresponding mounting base 501; the bottom right side of the second steel lattice column diagonal brace 402 is fixedly connected to the top of the corresponding quick connection mechanism 5, and is in movable contact with the top inclined surface of the corresponding mounting base 501.

[0042] Furthermore, a second bearing 406 is installed in the rotating hole on the U-shaped frame 403 through which the diagonal bracing screw 404 passes. The outer side of the diagonal bracing screw 404 is fixedly connected to the inner side of the inner ring of the second bearing 406. The diagonal bracing screw 404 is rotatably mounted on the U-shaped frame 403 through the second bearing 406.

[0043] This utility model's support structure, through a series of structural settings, allows for adjustment of the total length of the adjustable steel lattice column bracing mechanism based on the distance between the support pile 1 and the steel structure column bracing platform 2. This enables it to be applicable to different distances between the support pile 1 and the steel structure column bracing platform 2 without requiring replacement or adjustment, thus improving its flexibility. Furthermore, the quick-connect mechanism 5 allows for rapid installation and fixing of the steel lattice column bracing mechanism 4 to the support pile 1 and the steel structure column bracing platform 2 via a pressing action, facilitating personnel operation.

[0044] The working principle of this utility model:

[0045] In use, after the support pile 1, the steel structure column inclined support platform 2, and the steel structure column inclined support column 3 are constructed, the total length of the adjustable steel lattice column inclined support mechanism is first adjusted according to the distance between the support pile 1 and the steel structure column inclined support platform 2. During adjustment, the knob 405 is rotated forward. The knob 405 drives the corresponding inclined support screw 404 to rotate. As the inclined support screw 404 rotates, it drives the corresponding first steel lattice column inclined support 401 to move away from the second steel lattice column inclined support 402. The movement of 1 causes the total length of the steel lattice column bracing mechanism 4 to change (i.e., become longer). When the locking blocks 502 on the first steel lattice column bracing 401 and the second steel lattice column bracing 402 are aligned with the rectangular slots 510 on the corresponding mounting bases 501, the knob 405 is stopped from being rotated, thereby completing the adjustment of the total length of the steel lattice column bracing mechanism 4. This adjustable total length method can be applied to different distances between the support pile 1 and the steel structure column bracing platform 2 without the need for replacement and adjustment, thus improving the flexibility of use.

[0046] During installation after adjustment, first install the lower steel lattice column diagonal bracing mechanism 4 (i.e., the first steel lattice column diagonal bracing 401), and then install the upper steel lattice column diagonal bracing mechanism 4 (i.e., the second steel lattice column diagonal bracing 402). During installation, press down directly on the first steel lattice column diagonal bracing 401 and the second steel lattice column diagonal bracing 402. The first steel lattice column diagonal bracing 401 and the second steel lattice column diagonal bracing 402 respectively drive the corresponding locking blocks 502 to move into the rectangular slots 510 on the corresponding mounting bases 501. As the locking blocks 502 move downward, their figure-eight shaped openings 504 pass through the corresponding V-shaped plates 506 and contact the top of the arc-shaped elastic limiting plates 507. As the locking blocks 502 continue to move downward, the figure-eight shaped openings 504 squeeze the arc-shaped elastic limiting plates 507, and under the squeezing force, the two sides of the arc-shaped elastic limiting plates 507 move inward. When the arc-shaped elastic limiting plate 507 is misaligned with the figure-eight structure opening 504, the V-shaped plate 506 is adapted to be movably embedded in the inverted V-shaped inner groove 505, while the arc-shaped elastic limiting plate 507, which is in a contracted state, gradually returns to its original position. The bottom two sides of the arc-shaped elastic limiting plate 507 are in active contact with the bottom inner wall of the corresponding extrusion hole 503. At this time, the arc-shaped elastic limiting plate 507 restricts the corresponding locking block 502 in the vertical direction. Following the above steps, the installation and fixing connection of the steel lattice column diagonal bracing mechanism 4, the support pile 1, and the steel structure column diagonal bracing platform 2 are completed. In this embodiment, this pressing and fixing connection method facilitates personnel operation, improves installation efficiency, and at this time, the support pile 1 is further supported by the cooperation of multiple steel lattice column diagonal bracing mechanisms 4 and steel structure column diagonal bracing platforms 2, which improves the stability of the support.

[0047] When further disassembly is required, the T-shaped screw 508 can be rotated forward. The T-shaped screw 508 rotates and moves upward within the corresponding threaded sleeve 509. The T-shaped screw 508 drives the arc-shaped elastic limiting plate 507 to move upward. When the arc-shaped elastic limiting plate 507 moves upward to contact the corresponding V-shaped plate 506, the continuing upward movement of the arc-shaped elastic limiting plate 507 squeezes the inner groove wall of the V-shaped plate 506. Under the reaction force of the squeeze, the two sides of the arc-shaped elastic limiting plate 507 contract inward again. Because the lateral distance at the widest point of the V-shaped plate is greater than the opening of the corresponding extrusion hole bottom figure-eight structure 5... The minimum diameter in 04 is still small, so when the arc-shaped elastic limiting plate 507 retracts inward, the vertical distance on both sides of it is offset from the bottom inner wall of the extrusion hole 503, thereby releasing the fixation of the locking block 502. At this time, the first steel lattice column diagonal brace 401 and the second steel lattice column diagonal brace 402 can be moved upward so that they respectively drive the corresponding locking block 502 to separate from the mounting base 501, thereby completing the disassembly. After disassembly, the T-shaped screw 508 can be rotated in the opposite direction to drive the corresponding arc-shaped elastic limiting plate 507 to separate from the V-shaped plate 506, so that the arc-shaped elastic limiting plate 507 is reset, and it can wait for the next installation operation.

[0048] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel lattice column diagonal bracing support structure for deep foundation pits near subway stations, characterized in that, The system includes support piles and steel structure column inclined support platforms. Multiple steel structure column inclined support columns are fixedly connected to the bottom of the steel structure column inclined support platforms. The support pile on the right side and the steel structure column inclined support platform on the left side are connected by multiple adjustable-length steel lattice column inclined support mechanisms. These mechanisms are divided into upper and lower groups according to their installation height, with several mechanisms arranged side-by-side in each group. The right end of each steel lattice column inclined support mechanism is higher than its left end. Multiple quick-connect mechanisms are fixedly connected to the left side wall of the support pile, the top surface of the steel structure column inclined support platform, and the right side wall. Each steel lattice column inclined support mechanism is connected to its corresponding support pile and steel structure column inclined support platform through two quick-connect mechanisms simultaneously connected to it.

2. The steel lattice column diagonal bracing support structure for deep foundation pits near subway stations according to claim 1, characterized in that, The quick-connect mechanism includes a mounting base with an inclined top, which is fixed to the corresponding position of the support pile or the steel structure column diagonal brace platform. The mounting base has a rectangular slot with an open top, and a locking block is movably mounted within the rectangular slot. The top of the locking block is fixed to the corresponding position of the bottom end of the steel lattice column diagonal brace mechanism. On the side of the locking block away from the steel lattice column diagonal brace mechanism, there is a pressing hole with a figure-eight shaped opening at the bottom. An inverted V-shaped inner groove extending in the front-back direction is formed on the top inner wall of the pressing hole. An inverted V-shaped plate is fixedly installed within the rectangular slot. The V-shaped plate can pass through the figure-eight shaped opening and movably embed into the inverted V-shaped inner groove. The widest part of the V-shaped plate has the smallest lateral distance. The minimum diameter of the corresponding figure-eight structure opening at the bottom of the extrusion hole; an arc-shaped elastic limiting plate is provided below the V-shaped plate, and an inverted T-shaped screw is rotatably installed at the bottom of the arc-shaped elastic limiting plate. The bottom of the T-shaped screw extends downward to the outer side of the corresponding mounting base. The bottom of the mounting base has a through hole communicating with the rectangular slot. The T-shaped screw is threaded into the through hole and can move up and down in the rectangular slot by its own rotation. After the arc-shaped elastic limiting plate is squeezed and contracted into the rectangular slot at the figure-eight structure opening of the extrusion hole, the arc-shaped elastic limiting plate rebounds and its bottom two sides are in active contact with the inner wall of the bottom of the corresponding extrusion hole. The V-shaped plate can squeeze and contract the arc-shaped elastic limiting plate after it has moved upward.

3. The steel lattice column diagonal bracing support structure for deep foundation pits near subway stations according to claim 2, characterized in that, A threaded sleeve is embedded and fixed inside the through hole, and the T-shaped screw passes through the threaded sleeve and is threadedly connected to the threaded sleeve.

4. The steel lattice column diagonal bracing support structure for deep foundation pits near subway stations according to claim 2, characterized in that, A bearing sleeve is embedded and fixed at the center of the bottom surface of the arc-shaped elastic limiting plate. A first bearing is fixed inside the bearing sleeve. The inner side of the inner ring of the first bearing is fixedly connected to the outer side of the upper end of the corresponding T-shaped screw. The T-shaped screw is rotatably mounted at the center of the bottom surface of the arc-shaped elastic limiting plate through the first bearing.

5. A steel lattice column diagonal bracing support structure for deep foundation pits near subway stations according to claim 4, characterized in that, The front and rear sides of the arc-shaped elastic limiting plate are in contact with the front and rear inner walls of the corresponding rectangular slots, respectively. The arc-shaped elastic limiting plate is restricted and guided by the front and rear inner walls of the rectangular slots, so that the arc-shaped elastic limiting plate can only move up and down.

6. A steel lattice column diagonal bracing support structure for deep foundation pits near subway stations according to claim 2, characterized in that, The front and rear sides of the V-shaped plate are fixedly connected to the inner wall of the corresponding rectangular slot.

7. The steel lattice column diagonal bracing support structure for deep foundation pits near subway stations according to claim 2, characterized in that, The distance between the bottom inner wall of the T-shaped screw and the corresponding mounting base is greater than the distance between the top of the arc-shaped elastic limiting plate and the top inner wall of the V-shaped plate.

8. A steel lattice column diagonal bracing support structure for deep foundation pits near subway stations according to claim 2, characterized in that, The steel lattice column diagonal bracing mechanism includes a first steel lattice column diagonal brace and a second steel lattice column diagonal brace connected to each other. The lower left end of the first steel lattice column diagonal brace is connected to the steel structure column diagonal brace support platform, and the upper right end of the second steel lattice column diagonal brace is connected to the support pile. A U-shaped frame is fixedly connected to the lower left end of the second steel lattice column diagonal brace. A threaded hole is coaxially opened on the right side inside the first steel lattice column diagonal brace. A diagonal bracing screw is threadedly connected to the corresponding threaded hole. The right end of the diagonal bracing screw extends to the upper right and rotates to insert into the corresponding U-shaped frame. At the same time, the right end of the diagonal bracing screw is fixedly connected to a knob located in the corresponding U-shaped frame.

9. A steel lattice column diagonal bracing support structure for deep foundation pits near subway stations according to claim 8, characterized in that, The bottom left end of the first steel lattice column diagonal brace is fixedly connected to the top of the corresponding quick-connect mechanism and is in movable contact with the top inclined surface of the corresponding mounting base; the bottom right end of the second steel lattice column diagonal brace is fixedly connected to the top of the corresponding quick-connect mechanism and is in movable contact with the top inclined surface of the corresponding mounting base.

10. A steel lattice column diagonal bracing support structure for deep foundation pits near subway stations according to claim 8, characterized in that, A second bearing is installed in the rotating hole on the U-shaped frame through which the diagonal bracing screw passes. The outer side of the diagonal bracing screw is fixedly connected to the inner side of the inner ring of the second bearing. The diagonal bracing screw is rotatably mounted on the U-shaped frame through the second bearing.

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