Foundation pit protection system and protection method

Abstract

The present invention provides a foundation pit protection system and a protection method, which relate to the technical field of foundation pit protection, and include: a first sliding seat, a sliding vertical frame, a protection plate, a second sliding seat, an elastic support, a protection frame and a protection chain. The present invention adopts an "inverted" T-shaped structure of the protection railing, and the sliding vertical frame and the protection plate can slide in the length direction of the first sliding seat; and the second sliding seat is designed, and the second sliding seat, the first sliding seat and the sliding vertical frame form a triangle, and the second sliding seat is supported by the elastic support. This structure relies on the inclined second sliding seat to form an elastic slope toward the inner side of the foundation pit, which can effectively avoid the damage of various machines and dropped objects to the protection system during the construction process inside the foundation pit, and in the process of expanding the foundation pit, it can efficiently and quickly complete the outward movement of the foundation pit protection system, greatly reducing labor costs and saving construction period.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit protection, in particular to a foundation pit protection system and a protection method. Background Art

[0002] The foundation pit refers to the earth pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. It is the space below the ground excavated for the construction of building foundations and underground buildings. Necessary protection is required during the foundation pit construction process.

[0003] During the excavation process, foundation pit protection is a dynamic process. The pouring of concrete structure and the excavation and expansion of the foundation pit are carried out synchronously and orderly. The traditional foundation pit protection system is a fixed structure. During the construction process, the foundation pit protection structure needs to be repeatedly disassembled and installed, which requires large engineering workload and personnel costs, and may extend the construction period. For this reason, the present invention provides a foundation pit protection system and protection method. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a foundation pit protection system and a protection method, which solves the problem that the traditional foundation pit protection system is a fixed structure, the foundation pit protection structure needs to be repeatedly disassembled and installed during the construction process, the engineering workload and labor costs are large, and the construction period may be prolonged.

[0005] To achieve the above objectives, the present invention provides a foundation pit protection system, which includes two groups of symmetrically arranged support mechanisms, a protection plate located between the two groups of support mechanisms, and a protection frame located on one side of the protection plate; each group of support mechanisms includes a first sliding seat, a sliding vertical frame, a protection plate, a second sliding seat, an elastic support, a protection frame and a protection chain, wherein the first sliding seat is fixedly connected to the ground through an anchor rod; the sliding vertical frame is slidably mounted on the first sliding seat, and the sliding vertical frame has an inverted nail for fixing the sliding vertical frame and the first sliding seat, the first end of the second sliding seat is movably connected to the second end of the first sliding seat through a pin, the second sliding seat, the first sliding seat and the sliding vertical frame form a triangle, the bottom end of the elastic support is fixedly mounted on the top of the first sliding seat, and the top end of the elastic support is located obliquely below the second sliding seat; the two ends of the protection chain 5 are respectively connected to the side of the sliding vertical frame 4 and the second end of the second sliding seat 2; the protection frame 6 is fixedly mounted on the sides of the two groups of second sliding seats 2, and the protection plate 8 is detachably fixedly mounted between the two groups of sliding vertical frames 4.

[0006] A better technical solution of the present invention: the first sliding seat includes a sliding frame body and a fixed ear, the two ends of the sliding frame body are respectively a male head and a female head that can be rotatably connected by a pin, the top of the sliding frame body is provided with a flat part, and the bottom two sides of the sliding frame body are provided with widened support parts, and the widened support parts are provided with a first threaded hole; a transverse through hole is provided on the side of the sliding frame body, the fixed ear is movably arranged inside the transverse through hole, and both ends of the fixed ear extend out of the transverse through hole.

[0007] A better technical solution of the present invention: the fixing ear includes a first main body and a second main body, the first end of the first main body is fixedly connected to the first connecting ear, and the second end of the first main body is fixedly connected to the first threaded segment; the first end of the second main body is fixedly connected to the second connecting ear, and the second end of the second body is provided with a threaded connecting hole, and the first threaded segment is threadedly matched with the threaded connecting hole.

[0008] A preferred technical solution of the present invention is as follows: the elastic support comprises a support tube, the bottom end of the support tube is fixedly connected with a second threaded section, the top end of the support tube is open, a threaded hole is formed at the top of the sliding frame body, and the second threaded section is threadedly installed in the threaded hole at the top of the sliding frame body;

[0009] A more preferred technical solution of the present invention is as follows: a spring is fixedly connected to the bottom end of the support rod, the spring is located inside the support tube, and the bottom of the support rod is slidably connected to the support tube.

[0010] The better technical solution of the present invention is as follows: the sliding vertical frame includes a third sliding seat and a profile frame, the bottom of the third sliding seat is provided with an arc-shaped opening, the inner top of the arc-shaped opening is provided with a second threaded hole, and the inverted nail is installed at the second threaded hole in an inverted threaded manner; the bottom end of the profile frame is fixedly connected with a connecting seat, the bottom of the connecting seat is fixedly installed with the top of the third sliding seat, and the side of the profile frame is provided with a T-shaped opening; the side of the protective plate is fixedly installed inside the T-shaped opening of the profile frame through a connecting clip.

[0011] A preferred technical solution of the present invention: the protective plate comprises a light sandwich plate body, both sides of the light sandwich plate body are fixedly connected with frame members, the side of the frame member is provided with a second horizontal opening; the inner side of the T-shaped opening is provided with a first horizontal opening;

[0012] The connecting card includes a flat strip plate, a card block is fixedly connected to the top of the flat strip plate, the frame component is located inside the T-shaped opening, and the flat strip plate is also located inside the first horizontal opening and the second horizontal opening; the cross-sectional shape of the card block matches the cross-sectional shape of the T-shaped opening.

[0013] A preferred technical solution of the present invention is as follows: a positioning hole is provided on the top of the third sliding seat, through holes are provided on the top of the third sliding seat and on both sides of the positioning hole, a first pin is fixedly connected to the bottom of the connecting seat and located inside the through hole, a notch is provided on the side of the first pin, a positioning protrusion is fixedly connected to the bottom of the connecting seat and located inside the positioning hole, a step is provided on the side of the third sliding seat, and the notch of the first pin is exposed at the step on the side of the third sliding seat;

[0014] It also includes: a frame frame, which is opened on the outside of the third sliding seat, and the frame frame and the third sliding seat are fixedly connected by installing screws, and the side of the frame frame is located on the inner side of the notch.

[0015] A more preferred technical solution of the present invention is as follows: a ring ear is fixedly installed on the side of the profile frame, a lifting ear is threadedly installed on the side of the second sliding seat, and a protective chain is installed between the ring ear and the lifting ear.

[0016] A preferred technical solution of the present invention is as follows: the protective frame comprises a first horizontal frame and a second horizontal frame, ends of the first horizontal frame and the second horizontal frame are fixedly mounted on the second sliding seat, and a diagonal brace is fixedly connected between the first horizontal frame and the second horizontal frame.

[0017] Another object of the present invention is to provide a foundation pit protection method, using the above foundation pit protection system, specifically comprising the following steps:

[0018] S1. Install the foundation pit protection system at the outer edge of the foundation pit, and make the side where the second sliding seat is located face the inner side of the foundation pit;

[0019] S2. When the foundation pit is expanded, the two groups of second sliding seats are removed, and the two groups of second sliding seats are respectively installed on the ends of the two groups of first sliding seats away from the inner side of the foundation pit, so that the two groups of second sliding seats are respectively in a straight line with the two groups of first sliding seats, and the two groups of second sliding seats are respectively fixed to the ground with anchor rods. At this time, the two groups of first sliding seats and the second sliding seats form two parallel sliding tracks, and the positions of the two groups of sliding vertical frames and protective plates are adjusted along the sliding tracks formed by the first sliding seats and the second sliding seats, and the two groups of elastic supports are removed, and the two groups of elastic supports are respectively installed on the two groups of second sliding seats, and finally the two groups of first sliding seats are flipped over, and protective chains are installed between the two groups of first sliding seats and the two groups of sliding vertical supports to form a new foundation pit protection system, in which the first sliding seat is adjacent to the inner side of the foundation pit.

[0020] The present invention provides a foundation pit protection system and a protection method, which have the following beneficial effects:

[0021] 1. The present invention adopts an "inverted" T-shaped guardrail, and the sliding vertical frame and the guard plate can slide in the length direction of the first sliding seat; and a second sliding seat is designed. The second sliding seat, the first sliding seat and the sliding vertical frame form a triangle, and the second sliding seat is supported by an elastic support. This structure relies on the inclined second sliding seat to form an elastic slope toward the inner side of the foundation pit, which can effectively prevent the damage to the protection system by various machines and dropped objects during the construction process inside the foundation pit. In addition, during the expansion of the foundation pit, the outward movement of the foundation pit protection system can be completed efficiently and quickly, which greatly reduces labor costs and saves construction period.

[0022] 2. The first sliding seat and the second sliding seat in the present invention can be used alternately. When the foundation pit is expanded, it is only necessary to remove the protective frame and the second sliding seat adjacent to the inner side of the foundation pit, and fix the second sliding seat on the extension line of the first sliding seat away from the inner side of the foundation pit, and form an integral slideway with the first sliding seat. The protective plate can be directly slid toward the outside of the foundation pit through the slideway to move its position. When sliding to the expanded width of the foundation pit, the original first sliding seat is flipped to the original position of the second sliding seat, and the protective frame is installed on the flipped first sliding seat, so that the protective plate can be supported and protected. The whole process is simple and convenient, and there is no need to carry the entire protective plate and the sliding vertical frame, which reduces the difficulty of disassembly and transportation of the protection system.

[0023] 3. The present invention designs the specific structure of the sliding vertical frame so that the various parts are combined and installed, and the assembly and disassembly can be completed on the foundation pit site.

[0024] 4. The present invention achieves fixation between the third sliding seat and the sliding frame body by threading the inverted nail on the inner side of the third sliding seat, and the bottom of the inverted nail can abut against the top of the sliding frame body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a first-view stereoscopic diagram of the foundation pit protection system proposed by the present invention;

[0026] Figure 2 It is a side schematic diagram of the foundation pit protection system proposed by the present invention;

[0027] Figure 3 A second perspective stereoscopic diagram of the foundation pit protection system proposed by the present invention;

[0028] Figure 4 A three-dimensional diagram of a sliding vertical frame of the foundation pit protection system proposed by the present invention;

[0029] Figure 5 for Figure 4 A partial enlarged schematic diagram in the middle;

[0030] Figure 6 A three-dimensional diagram of a sliding seat of the foundation pit protection system proposed by the present invention;

[0031] Figure 7 A three-dimensional diagram of the fixing ears of the foundation pit protection system proposed by the present invention;

[0032] Figure 8 A three-dimensional diagram of the elastic support of the foundation pit protection system proposed by the present invention;

[0033] Fig. 9 This is a schematic diagram of the coordination of the protection plates of the foundation pit protection system proposed in the present invention.

[0034] Among them, 1. first sliding seat; 101. sliding frame body; 101a. flat part; 102. widened support part; 103. first threaded hole; 104. fixing ear; 104a. first body; 104b. first connecting ear; 104c. first threaded section; 104d. second body; 104e. threaded connecting hole; 104f. second connecting ear; 2. second sliding seat; 3. elastic support; 301. support tube; 302. second threaded section; 303. support rod; 304. spring; 4. sliding vertical frame; 401. profile frame; 402. connecting seat; 403. positioning protrusion; 404. The first pin; 405, the notch; 406, the third sliding seat; 407, the inverted pin; 408, the arc-shaped opening; 409, the positioning opening; 4010, the through hole; 4011, the frame; 4012, the mounting screw; 4013, the second threaded hole; 4014, the ring ear; 4015, the T-shaped opening; 4016, the first horizontal opening; 5, the protective chain; 6, the protective frame; 601, the first horizontal frame; 602, the second horizontal frame; 603, the diagonal brace; 7, the connecting clip; 701, the flat strip plate; 702, the block; 8, the protective plate; 801, the lightweight sandwich panel; 802, the frame member; 803, the second horizontal opening. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] like Figure 1-Figure 9As shown, an embodiment of the present invention provides a foundation pit protection system, including two groups of symmetrically arranged support mechanisms, a protection plate 8 located between the two groups of support mechanisms, and a protection frame 6 located on one side of the protection plate 8; each group of support mechanisms includes a first sliding seat 1, a sliding vertical frame 4, a second sliding seat 2, an elastic support 3, and a protection chain 5. The first sliding seat 1 of each group of supporting mechanisms is fixedly connected to the ground through an anchor rod, and the first sliding seat 1 can be approximately perpendicular to the outer edge of the foundation pit. The sliding vertical frame 4 is slidably installed on the first sliding seat 1. When the foundation pit is expanded, the sliding vertical frame 4 and the protective frame 6 can be slidably adjusted along the length direction of the first sliding seat 1. The sliding vertical frame 4 has an inverted nail 407 for fixing the sliding vertical frame 4 and the first sliding seat 1. That is, when it is necessary to adjust the position of the sliding vertical frame 4, the inverted nail 407 is adjusted upward. At this time, the sliding vertical frame 4 slides on the first sliding seat 1; when the position adjustment of the sliding vertical frame 4 and the protective frame 6 is completed, the inverted nail 407 can be adjusted downward to keep the sliding vertical frame 4 and the first sliding seat 1 fixed, and the protective plate 8 can be detachably fixedly installed between the two groups of sliding vertical frames 4. The protective plate 8 and the two groups of sliding vertical frames 4 constitute a protective fence. The sliding vertical frame 4 serves as a fixed frame, and the protective plate 8 serves as a baffle panel; the first end of the second sliding seat 2 The second end of the first sliding seat 1 is movably connected to the second end of the first sliding seat 1 by a pin, and the second sliding seat 2, the first sliding seat 1 and the sliding vertical frame 4 form a triangle. The bottom end of the elastic support 3 is fixedly installed on the top of the first sliding seat 1, and the top end of the elastic support 3 is located obliquely below the second sliding seat 2. In this structure, the second sliding seat 2 is in a rotatable inclined state and is elastically supported by the elastic support 3. When encountering falling objects / engineering machinery collisions, it can effectively play a buffering role and can well protect the protective plate 8 and the sliding vertical frame 4. The protective frame 6 is fixedly installed on the sides of the two groups of second sliding seats 2. The protective frame 6 is used to increase the protection area. Compared with the single second sliding seat 2, the overall structure formed by the second sliding seat 2 and the protective frame 6 has a better protection effect. The two ends of the protective chain 5 are respectively connected to the side of the sliding vertical frame 4 and the second end of the second sliding seat 2. The protective chain 5 remains loose and is used to limit the second sliding seat 2 from rotating in a direction away from the sliding vertical frame 4.

[0038] In the present solution, by adopting a guardrail with an "inverted" T-shaped structure (the first sliding seat 1 and the sliding vertical frame 4 are an "inverted" T-shaped structure), the sliding vertical frame 4 and the guard plate 8 can slide in the length direction of the first sliding seat 1; and a second sliding seat 2 is designed, the second sliding seat 2, the first sliding seat 1 and the sliding vertical frame 4 form a triangle, and the second sliding seat 2 is supported by an elastic support 3. This structure relies on the inclined second sliding seat 2 to form an elastic slope toward the inner side of the foundation pit, which can effectively avoid damage to the protection system by various machines and dropped objects during the construction process inside the foundation pit, and in the process of expanding the foundation pit, it can efficiently and quickly complete the outward movement of the foundation pit protection system, greatly reducing labor costs and saving construction period.

[0039] When the foundation pit is expanded, the second sliding seat 2 is removed and installed at the end of the first sliding seat 1 away from the inner side of the foundation pit, and the second sliding seat 2 is fixed to the ground with anchor rods. The positions of the sliding vertical frame 4 and the protective plate 8 are adjusted by sliding along the sliding track formed by the first sliding seat 1 and the second sliding seat 2, and the elastic support 3 is removed and installed on the second sliding seat 2. Finally, the first sliding seat 1 is flipped over to form a new foundation pit protection system, and the protective chain 5 is installed on the new foundation pit protection system. In the new foundation pit protection system, the positions of the first sliding seat 1 and the second sliding seat 2 are exchanged.

[0040] In one embodiment, if Figure 3 As shown, the first sliding seat 1 includes a sliding frame body 101 and a fixing ear 104, wherein the sliding frame body 101 serves as a main structure, and the two ends of the sliding frame body 101 are respectively a male head and a female head that can be rotatably connected by a pin, and a flat portion 101a is provided on the top of the sliding frame body 101, and the flat portion 101a cooperates with the inverted nail 407, and widened support portions 102 are provided on both sides of the bottom of the sliding frame body 101, and the widened support portion 102 can increase the contact surface between the sliding frame body 101 and the ground, and is used to widen the support area, and a first threaded hole 103 is opened on the widened support portion 102.

[0041] A transverse through hole is opened on the side of the sliding frame body 101, and a fixing ear 104 is movably arranged inside the transverse through hole, and both ends of the fixing ear 104 extend out of the transverse through hole. The two ends of the fixing ear 104 are used to connect anchor rods (not shown in the drawings), the anchor rods are deeply inserted into the foundation pit ground, and the top end of the anchor rods is fixedly connected to the fixing ear 104.

[0042] The second sliding seat 2 has the same structure as the first sliding seat 1 , and the second sliding seat 2 and the first sliding seat 1 are only different in position and purpose.

[0043] In one embodiment, if Figure 7 As shown, the fixing ear 104 includes a first body 104a and a second body 104d. The first end of the first body 104a is fixedly connected to the first connecting ear 104b, the second end of the first body 104a is fixedly connected to the first threaded section 104c, the first end of the second body 104d is fixedly connected to the second connecting ear 104f, the second end of the second body 104d is provided with a threaded connection hole 104e, and the first threaded section 104c is threadedly matched with the threaded connection hole 104e.

[0044] When in use, the first body 104a and the second body 104d are respectively inserted from both ends of the transverse through hole. Inside the transverse through hole, the first thread segment 104c is threadedly connected with the threaded connection hole 104e to fix the first body 104a and the second body 104d together.

[0045] In one embodiment, if Figure 8 As shown, the elastic support 3 includes a support tube 301 and a support rod 303 .

[0046] The bottom end of the support tube 301 is fixedly connected with a second threaded section 302, the top end of the support tube 301 is open, and a threaded hole is opened at the top of the sliding frame body 101. The second threaded section 302 is threadedly installed in the threaded hole at the top of the sliding frame body 101, and the bottom end of the support rod 303 is fixedly connected with a spring 304, and the spring 304 is located inside the support tube 301. The bottom of the support rod 303 is slidably connected to the support tube 301, and the support tube 301 and the support rod 303 are slidable, and the support rod 303 is elastically supported by the spring 304.

[0047] In one embodiment, if Figure 5 and Figure 6 As shown, the sliding vertical frame 4 includes a third sliding seat 406 , a profile frame 401 , and an inverted nail 407 . An arc-shaped opening 408 is provided at the bottom of the third sliding seat 406, and the shape of the arc-shaped opening 408 matches the cross-sectional shape of the sliding frame body 101. Generally, the arc-shaped opening 408 is an arc-shaped opening greater than 180°. A second threaded hole 4013 is provided at the inner top of the arc-shaped opening 408, and an inverted nail 407 is installed at the second threaded hole 4013 in an inverted threaded manner. The bottom end of the inverted nail 407 is located on the inner side of the arc-shaped opening 408. By rotating the inverted nail 407, the height of the inverted nail 407 can be adjusted. The bottom end of the profile frame 401 is fixedly connected to the connecting seat 402, and the bottom of the connecting seat 402 is fixedly installed with the top of the third sliding seat 406. A T-shaped opening 4015 is provided on the side of the profile frame 401, and the side of the protective plate 8 is fixedly installed inside the T-shaped opening 4015 of the profile frame 401 through the connecting clamp 7.

[0048] In one embodiment, if Fig. 9 As shown, the protective plate 8 comprises a light sandwich panel 801 and a frame member 802. The frame members 802 are fixedly connected to both sides of the light sandwich panel 801, and a second horizontal opening 803 is provided on the side of the frame member 802. A first horizontal opening 4016 is provided on the inner side of the T-shaped opening 4015.

[0049] The connecting clamp 7 includes: a flat strip plate 701, a clamp block 702 is fixedly connected to the top of the flat strip plate 701, a frame member 802 is located inside the T-shaped opening 4015, and the flat strip plate 701 is also located inside the first horizontal opening 4016 and the second horizontal opening 803; the cross-sectional shape of the clamp block 702 matches the cross-sectional shape of the T-shaped opening 4015.

[0050] When installing the protective plate 8, the frame member 802 is inserted into the T-shaped opening 4015 from the side, and then the flat strip plate 701 is slid into the top of the T-shaped opening 4015. The flat strip plate 701 is simultaneously located inside the first horizontal opening 4016 and the second horizontal opening 803, thereby limiting the frame member 802 from being pulled out from the T-shaped opening 4015.

[0051] In one embodiment, if Figure 5 and Figure 6 As shown, a positioning hole 409 is provided at the top of the third sliding seat 406, through holes 4010 are provided at the top of the third sliding seat 406 and on both sides of the positioning hole 409, a first pin 404 is fixedly connected to the bottom of the connecting seat 402 and inside the through hole 4010, a notch 405 is provided on the side of the first pin 404, a positioning protrusion 403 is fixedly connected to the bottom of the connecting seat 402 and inside the positioning hole 409, a step is provided on the side of the third sliding seat 406, and the notch 405 of the first pin 404 is exposed at the step on the side of the third sliding seat 406.

[0052] It also includes: a frame frame 4011, which is opened on the outer side of the third sliding seat 406, and the frame frame 4011 is fixedly connected to the third sliding seat 406 by installing screws 4012, and the side of the frame frame 4011 is located on the inner side of the notch 405.

[0053] After installation, the side of the frame 4011 is located inside the notch 405 to limit the first pin 404 from being pulled out of the through hole 4010 . The positioning opening 409 cooperates with the positioning protrusion 403 to ensure a stable connection between the third sliding seat 406 and the connecting seat 402 .

[0054] In one embodiment, if Fig. 9 As shown, the side of the profile frame 401 is fixedly mounted with a ring ear 4014, the side of the second sliding seat 2 is threadedly mounted with a lifting ear, and a protective chain 5 is installed between the ring ear 4014 and the lifting ear. The threaded hole for mounting the lifting ear of the second sliding seat 2 is the same as the threaded hole for connecting the elastic support 3 of the first sliding seat 1.

[0055] In one embodiment, if Figure 3 As shown, the protective frame 6 includes: a first horizontal frame 601 and a second horizontal frame 602. The ends of the first horizontal frame 601 and the second horizontal frame 602 are fixedly installed on the second sliding seat. A diagonal brace 603 is fixedly connected between the first horizontal frame 601 and the second horizontal frame 602. The first horizontal frame 601, the second horizontal frame 602 and the diagonal brace 603 constitute a stable supporting surface.

[0056] Embodiment 2: A foundation pit protection method is provided, using the foundation pit protection system in embodiment 1, specifically comprising the following steps:

[0057] S1. Install the foundation pit protection system at the outer edge of the foundation pit, and make the side where the second sliding seat 2 is located face the inner side of the foundation pit.

[0058] Specifically, it includes using anchor rods to install the first sliding seat 1, then installing the elastic support 3 on the first sliding seat 1, installing the sliding vertical frame 4 on the first sliding seat 1, and installing the protective plate 8 on the side of the sliding vertical frame 4, then installing the second sliding seat 2 at the end of the first sliding seat 1, and finally installing the protective frame 6 and the protective chain 5.

[0059] S2. When the foundation pit is expanded, the two groups of second sliding seats 2 are removed (the protective frame 6 and the protective chain 5 need to be removed first), and the two groups of second sliding seats 2 are respectively installed on the ends of the two groups of first sliding seats 1 away from the inner side of the foundation pit, so that they are respectively in a straight line with the two groups of first sliding seats 1, and the two groups of second sliding seats 2 are fixed to the ground with anchor rods. At this time, the two groups of first sliding seats 1 and the second sliding seats 2 form two parallel sliding tracks, and the positions of the two groups of sliding vertical frames 4 and the protective plates 8 are adjusted along the sliding tracks formed by the first sliding seats 1 and the second sliding seats 2, and the two groups of elastic supports 3 are removed, and the two groups of elastic supports 3 are respectively installed on the two groups of second sliding seats 2, and finally the two groups of first sliding seats 1 are flipped over, and the protective chain 5 is installed between the two groups of first sliding seats 1 and the two groups of sliding vertical supports 4 to form a new foundation pit protection system, in which the first sliding seat 1 is adjacent to the inner side of the foundation pit.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit protection system, characterized in that: The protection system comprises two groups of symmetrically arranged support mechanisms, a protection plate (8) located between the two groups of support mechanisms, and a protection frame (6) located on one side of the protection plate (8); each group of support mechanisms comprises a first sliding seat (1), a second sliding seat (2), an elastic support (3), a sliding vertical frame (4), and a protection chain (5); the first sliding seat (1) is fixedly connected to the ground via an anchor rod; the sliding vertical frame (4) is slidably mounted on the first sliding seat (1), and the sliding vertical frame (4) has an inverted nail (407) for fixing the sliding vertical frame (4) and the first sliding seat (1); the second sliding seat (2) has an inverted nail (407) for fixing the sliding vertical frame (4) and the first sliding seat (1); One end is movably connected to the second end of the first sliding seat (1) through a pin; the second sliding seat (2), the first sliding seat (1) and the sliding vertical frame (4) form a triangle; the bottom end of the elastic support (3) is fixedly mounted on the top of the first sliding seat (1), and the top end of the elastic support (3) is located obliquely below the second sliding seat (2); the two ends of the protection chain (5) are respectively connected to the side of the sliding vertical frame (4) and the second end of the second sliding seat (2); the protection frame (6) is fixedly mounted on the sides of the two groups of second sliding seats (2); and the protection plate (8) is detachably fixedly mounted between the two groups of sliding vertical frames (4).

2. A foundation pit protection system according to claim 1, characterized in that: The first sliding seat (1) comprises a sliding frame body (101) and a fixing ear (104); the two ends of the sliding frame body (101) are respectively a male head and a female head that can be rotatably connected by a pin; the top of the sliding frame body (101) is provided with a flat portion (101a); the bottom of the sliding frame body (101) is provided with widened support portions (102) on both sides, and the widened support portions (102) are provided with a first threaded hole (103); a transverse through hole is provided on the side of the sliding frame body (101); the fixing ear (104) is movably arranged inside the transverse through hole, and the two ends of the fixing ear (104) extend out of the transverse through hole.

3. A foundation pit protection system according to claim 2, characterized in that: The fixing ear (104) comprises a first main body (104a) and a second main body (104d); the first end of the first main body (104a) is fixedly connected to a first connecting ear (104b), and the second end of the first main body (104a) is fixedly connected to a first threaded section (104c); the first end of the second main body (104d) is fixedly connected to a second connecting ear (104f), and the second end of the second main body (104d) is provided with a threaded connection hole (104e), and the first threaded section (104c) is threadedly matched with the threaded connection hole (104e).

4. A foundation pit protection system according to claim 2, characterized in that: The elastic support (3) comprises a support tube (301) and a support rod (303); the bottom end of the support tube (301) is fixedly connected to a second threaded section (302); the top end of the support tube (301) is open; the top of the sliding frame body (101) is provided with a threaded hole; the second threaded section (302) is threadedly mounted in the threaded hole at the top of the sliding frame body (101); the bottom end of the support rod (303) is fixedly connected to a spring (304); the spring (304) is located inside the support tube (301); the bottom of the support rod (303) is slidably connected to the support tube (301).

5. A foundation pit protection system according to claim 2, characterized in that: The sliding vertical frame (4) comprises a third sliding seat (406) and a profile frame (401); the bottom of the third sliding seat (406) is provided with an arc-shaped opening (408); the inner top of the arc-shaped opening (408) is provided with a second threaded hole (4013); the inverted nail (407) is installed in the second threaded hole (4013) in an inverted threaded manner; The bottom end of the profile frame (401) is fixedly connected to a connecting seat (402), the bottom of the connecting seat (402) is fixedly mounted to the top of a third sliding seat (406), and a T-shaped opening (4015) is provided on the side of the profile frame (401); the side of the protective plate (8) is fixedly mounted inside the T-shaped opening (4015) of the profile frame (401) via a connecting clamp (7).

6. A foundation pit protection system according to claim 5, characterized in that: The protective plate (8) comprises a light sandwich plate body (801), both sides of the light sandwich plate body (801) are fixedly connected to frame members (802), and the side of the frame member (802) is provided with a second transverse opening (803); the inner side of the T-shaped opening (4015) is provided with a first transverse opening (4016); The connecting clamp (7) comprises a flat strip plate (701), a clamp block (702) is fixedly connected to the top of the flat strip plate (701), the frame member (802) is located inside the T-shaped opening (4015), and the flat strip plate (701) is also located inside the first horizontal opening (4016) and the second horizontal opening (803); The cross-sectional shape of the clamping block (702) matches the cross-sectional shape of the T-shaped opening (4015).

7. A foundation pit protection system according to claim 5, characterized in that: A positioning opening (409) is provided at the top of the third sliding seat (406), through holes (4010) are provided at the top of the third sliding seat (406) and on both sides of the positioning opening (409), a first pin (404) is fixedly connected at the bottom of the connecting seat (402) and inside the through hole (4010), a notch (405) is provided at the side of the first pin (404), a positioning protrusion (403) is fixedly connected at the bottom of the connecting seat (402) and inside the positioning opening (409), a step is provided at the side of the third sliding seat (406), and the notch (405) of the first pin (404) is exposed at the step on the side of the third sliding seat (406); It also includes: a frame frame (4011), the frame frame (4011) is opened on the outside of the third sliding seat (406), and the frame frame (4011) and the third sliding seat (406) are fixedly connected by mounting screws (4012), and the side of the frame frame (4011) is located on the inner side of the notch (405).

8. A foundation pit protection system according to claim 5, characterized in that: A ring ear (4014) is fixedly mounted on the side of the profile frame (401), a lifting ear is threadedly mounted on the side of the second sliding seat (2), and a protective chain (5) is mounted between the ring ear (4014) and the lifting ear.

9. A foundation pit protection system according to claim 1, characterized in that: The protection frame (6) comprises: a first horizontal frame (601) and a second horizontal frame (602); ends of the first horizontal frame (601) and the second horizontal frame (602) are fixedly mounted on a second sliding seat; and a diagonal brace (603) is fixedly connected between the first horizontal frame (601) and the second horizontal frame (602).

10. A foundation pit protection method, characterized in that: Using the foundation pit protection system according to any one of claims 1 to 9 to perform foundation pit protection specifically comprises the following steps: S1, installing a foundation pit protection system at the outer edge of the foundation pit, with the side where the second sliding seat (2) is located facing the inner side of the foundation pit; S2. When the foundation pit is expanded, the two sets of second sliding seats (2) are removed and the two sets of second sliding seats are respectively installed at the ends of the two sets of first sliding seats (1) away from the inner side of the foundation pit, so that the two sets of second sliding seats are respectively in a straight line with the two sets of first sliding seats (1), and the two sets of second sliding seats (2) are respectively fixed to the ground by anchor rods. At this time, the two sets of first sliding seats (1) and the second sliding seats (2) form two parallel sliding tracks. The positions of the two sets of sliding vertical frames (4) and the protective plates (8) are adjusted by sliding along the sliding tracks formed by the first sliding seats (1) and the second sliding seats (2), and the two sets of elastic supports (3) are removed and the two sets of elastic supports (3) are respectively installed on the two sets of second sliding seats (2). Finally, the two sets of first sliding seats (1) are turned over, and protective chains (5) are installed between the two sets of first sliding seats (1) and the two sets of sliding vertical frames (4) to form a new foundation pit protection system. In the new protection system, the first sliding seats (1) are adjacent to the inner side of the foundation pit.

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