A foundation pit supporting device

Abstract

The application relates to the field of high-end equipment manufacturing technology and provides a foundation pit supporting device, which comprises the following: a first surrounding purlin frame assembled at a foundation pit excavation opening; a second surrounding purlin frame assembled in the foundation pit; a baffle arranged and installed between the first surrounding purlin frame and the second surrounding purlin frame, the baffle pointing towards the inside of the foundation pit and being in contact with the side wall of the foundation pit, the baffle making linear motion relative to the bottom of the foundation pit along with the excavation of the foundation pit; and a first adjusting mechanism installed on the first surrounding purlin frame and the second surrounding purlin frame, used for adjusting the first surrounding purlin frame corner, the second surrounding purlin frame corner and the baffle located at the corners, so as to avoid the block at the corner of the foundation pit. The arrangement of the baffles can stop the corresponding baffles from moving downwards in time when the baffles meet the block of cement blocks, stone blocks, underground optical cables and the like during the excavation of the foundation pit, so that the block can be given way, the baffles in the foundation pit are adjusted through the first adjusting member and the second adjusting member, and then the soil on the lower side of the block can be prevented from collapsing.

Description

Technical Field

[0001] This invention relates to the field of high-end equipment manufacturing technology, specifically to a foundation pit support device. Background Technology

[0002] In current construction foundation pit excavation and support projects, traditional foundation pit support devices typically use channel steel with baffles to effectively prevent soil collapse and ensure the stability and construction safety of the foundation pit.

[0003] Currently, due to the presence of difficult-to-remove cement blocks, rocks, and power pipelines such as electricity and gas, as well as proximity to critical transportation facilities like subways, the requirements for foundation pit support construction are quite high. Traditional mechanical excavation and steel channel insertion methods are highly susceptible to damage to these important pipelines due to improper operation, or to jeopardize subway traffic safety, resulting in serious safety accidents and economic losses. Summary of the Invention

[0004] In view of the shortcomings of existing technologies in terms of poor support effect, the purpose of this invention is to provide a foundation pit support device with good support effect.

[0005] To address the above problems, the present invention provides the following technical solution:

[0006] A foundation pit support device includes: a first waler frame, assembled at the excavation opening of the foundation pit;

[0007] The second waler frame is installed inside the foundation pit;

[0008] A baffle is arranged and installed between the first waler frame and the second waler frame. The baffle points into the pit and contacts the side wall of the pit. The baffle moves in a straight line relative to the bottom of the pit as the pit is excavated.

[0009] The first adjustment mechanism is installed on the first waler frame and the second waler frame, and is used to adjust the corner of the first waler frame, the corner of the second waler frame, and the baffle located at the corner, so as to avoid the obstruction at the corner of the foundation pit;

[0010] The second adjustment mechanism, installed on the baffle, is used to adjust the baffle except at the corner, thereby avoiding obstacles in the foundation pit except at the corner.

[0011] In some embodiments, the first adjustment mechanism includes a slider, a fixing member, and a support member;

[0012] The sliding member is installed at the corner of the first waler frame and the second waler frame, and the fixing member is used to fix the sliding member;

[0013] When the foundation pit support device moves downward, it is blocked at the corner. The fixing of the fixing member is released, the sliding member is moved to make way, and then the support member is installed on the corresponding sliding member. Finally, the fixing member stops the sliding member from sliding and fixes the sliding member to the support member.

[0014] In some embodiments, there are multiple baffles, which are further divided into multiple groups with a gap between adjacent groups.

[0015] In some embodiments, the second adjustment mechanism includes a support plate and a plurality of locking elements; the number of locking elements is greater than or equal to three.

[0016] Multiple locking components are respectively installed on both sides of the support plate;

[0017] When the baffle is blocked by an obstacle, the support plate is installed on the upper and lower sides of the obstacle, and the locking member is engaged at the interval between two adjacent sets of baffles, and the support plate is fixed to the baffle through the locking member.

[0018] In some embodiments, the number of baffles in each group is 3-6, and the width of each baffle is between 150mm and 200mm.

[0019] In some embodiments, the locking element includes an insert and a locking block;

[0020] The insert can be inserted into the soil on the side wall of the pit, and the locking block can rotate with the insert to move to the outside of the baffle and lock onto the two adjacent baffles.

[0021] In some embodiments, the first waler frame includes a first horizontal waler, a second horizontal waler, a first longitudinal waler, and a second longitudinal waler;

[0022] The first horizontal waler and the first vertical waler are installed and fixed; the second horizontal waler and the second vertical waler are installed and fixed.

[0023] The first horizontal waler and the first vertical waler are located inside the second horizontal waler and the second vertical waler and together form a rectangular frame for excavation; the baffle is located between the first horizontal waler and the second horizontal waler and between the first vertical waler and the second vertical waler.

[0024] In some embodiments, the second waler frame includes a third transverse waler and a third longitudinal waler;

[0025] The third horizontal waler and the third vertical waler are installed and fixed, and the third horizontal waler and the third vertical waler together form a rectangular frame. The baffle is located outside the third horizontal waler and the third vertical waler, and the third horizontal waler and the third vertical waler make the baffle contact the side wall of the foundation pit.

[0026] In some embodiments, the sliding members are respectively installed at both ends of the first horizontal waler, the second horizontal waler, the third horizontal waler, the first longitudinal waler, the second longitudinal waler, and the third longitudinal waler, and the sliding members can slide along the length direction of the corresponding first horizontal waler, the second horizontal waler, the third horizontal waler, the first longitudinal waler, the second longitudinal waler, and the third longitudinal waler;

[0027] The fastener includes the first fastening block and the second fastening block;

[0028] The sliding member is fixed to the first horizontal waler, the second horizontal waler, the third horizontal waler, the first vertical waler, the second vertical waler, and the third vertical waler via the first fixing block; adjacent sliding members are fixed to each other via the second fixing block.

[0029] The support member includes a first support base and a second support base;

[0030] When the foundation pit support device moves downward, it is blocked at the corner, causing the sliding member to move. The first fixing frame is installed on the sliding member at the corresponding corner of the first waler frame and fixed by the second fixing block. Then, the corresponding sliding member is fixed to the first horizontal waler, the second horizontal waler, the first longitudinal waler, and the second longitudinal waler by the first fixing block. Similarly, the second fixing frame is installed on the sliding member at the corresponding corner of the second waler frame and fixed by the second fixing block. Then, the corresponding sliding member is fixed to the third horizontal waler and the third longitudinal waler by the first fixing block.

[0031] In some embodiments, the foundation pit support device further includes a jacking device, which is clamped between two opposing second longitudinal walers and two opposing third longitudinal walers.

[0032] The beneficial effects of this invention are: by arranging the baffles, when encountering obstacles such as cement blocks, stones, or underground optical cables during the excavation of the foundation pit, the corresponding baffles can be stopped from moving down in time, thus giving way to the obstacles. Then, by adjusting the baffles in the foundation pit through the first and second adjusting components, the soil located below the obstacles can be prevented from collapsing. It has high safety and effectively ensures the normal progress of foundation pit excavation. Attached Figure Description

[0033] Figure 1 This is a perspective view of the foundation pit support device for removing the jacking device according to the present invention;

[0034] Figure 2 A perspective view of the foundation pit support device for removing the jacking device according to the present invention, showing the installation of the support plate;

[0035] Figure 3 This is a top view of the foundation pit support device of the present invention;

[0036] Figure 4 The top view of the first waler frame of this invention is shown below.

[0037] Figure 5 This is a top view of the foundation pit support device of the present invention placed in the first support seat;

[0038] Figure 6 This is a top view of the present invention, showing the first waler frame removed and placed into the second support base;

[0039] Figure 7 This is a perspective view of one of the sliding components of the present invention;

[0040] Figure 8 This is a perspective view of another sliding component of the present invention;

[0041] Figure 9 This is a perspective view of the first support base of the present invention;

[0042] Figure 10 This is a perspective view of the second support base of the present invention;

[0043] Figure 11 This is a perspective view of the second adjustment mechanism of the present invention;

[0044] Figure 12 This is a perspective view of the locking component of the present invention.

[0045] Figure label:

[0046] 100. Excavation pit support device; 110. First waler frame; 120. Second waler frame; 130. Baffle; 140. First adjustment mechanism; 150. Second adjustment mechanism; 160. Connecting plate;

[0047] 111. First horizontal purlin; 112. Second horizontal purlin; 113. First vertical purlin; 114. Second vertical purlin;

[0048] 121. Third transverse purlin; 122. Third longitudinal purlin; 1a. Second limiting hole;

[0049] 141. Sliding component; 141a. First limiting hole; 141b. Third limiting hole; 141c. First mounting component; 141d. Fourth limiting hole; 142. Fixing component; 142a. First fixing block; 142b. Second fixing block; 143. Support component; 143a. First support base; 143b. Second support base; 143c. Second mounting component; 143d. Fifth limiting hole;

[0050] 151. Support plate; 152. Locking element; 152a. Insertion element; 152b. Locking block; 152c. Stop block; 152d. Handle;

[0051] 200. Support device;

[0052] 201. Hollow rod; 202. Round rod. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0054] 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 invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] For ease of description of the first, second, and third directions in the embodiments of this application, the first direction is the left-right direction in the figures, the second direction is the front-back direction in the figures, and the third direction is the up-down direction in the figures. The x-axis arrow direction is referred to as the "right" direction, the y-axis arrow direction as the "up" direction, and the z-axis arrow direction as the "back" direction, but these are not the sole limitations in the actual application of this application.

[0056] In current construction foundation pit excavation and support projects, traditional foundation pit support devices typically employ channel steel with baffles to effectively prevent soil collapse and ensure the stability and construction safety of the foundation pit. However, due to the potential presence of hard-to-remove cement blocks, rocks, and power pipelines such as electricity and gas lines, or even proximity to critical transportation facilities like subways, the requirements for foundation pit support construction are quite high. Traditional mechanical excavation and channel steel insertion methods are highly susceptible to damage to these important pipelines or jeopardize subway traffic safety due to improper operation, potentially leading to serious safety accidents and economic losses.

[0057] To address this challenge, construction workers attempted to use a support device that allows the retaining walls to be gradually lowered as the excavation progresses. This device, as it moves downwards with the pit's depth, can mitigate the impact of underground pipelines or other objects on construction when encountering concrete blocks, rocks, or gas / electricity lines. This is achieved by removing the retaining walls in those areas and having other steel retaining walls close to the lines, thus supporting the pit while minimizing their influence. However, this method has significant limitations when encountering complex geological structures with surrounding pipelines and gas facilities. It cannot effectively avoid these obstacles by removing too many retaining walls, leading to poor support and potential pit collapse, thus reducing the safety of construction within the pit. Therefore, developing a pit support device that effectively protects surrounding pipelines from damage while enhancing safety has become a pressing issue in current pit excavation projects.

[0058] like Figure 1-2As shown, this embodiment provides a foundation pit support device 100, which includes a first waler frame 110, a second waler frame 120, a baffle 130, a first adjustment mechanism 140, and a second adjustment mechanism 150. The first waler frame 110 is assembled at the excavation opening of the foundation pit; the second waler frame 120 is assembled inside the foundation pit; baffles 130 are arranged and installed between the first waler frame 110 and the second waler frame 120, with the baffles 130 pointing into the foundation pit and contacting the side wall of the foundation pit. The baffles 130 move linearly relative to the bottom of the foundation pit as the excavation depth increases; a first adjustment mechanism 140 is installed on the first waler frame 110 and the second waler frame 120, used to adjust the corners of the first waler frame 110 and the second waler frame 120, as well as the baffles 130 located at the corners, thereby avoiding obstacles at the corners of the foundation pit; a second adjustment mechanism 150 is installed on the baffles 130, used to adjust the baffles 130 except at the corners, thereby avoiding obstacles at the corners of the foundation pit. In other words, when excavating the foundation pit, the first waler frame 110 is placed at the excavation opening of the foundation pit. During excavation, the baffle 130 moves downwards as the pit is excavated, preventing collapse. A second waler frame 120 is positioned within the pit to support the baffle 130, further preventing collapse. During excavation, obstacles such as cement blocks, rocks, and underground fiber optic cables are inevitable. The baffle 130 is installed in an arranged manner (multiple baffles 130). When an obstacle is encountered, the corresponding baffle 130 stops moving downwards, effectively yielding to the obstacle. The first and second adjusting components further adjust the baffle 130 within the pit, preventing soil collapse below the obstacle. This yielding and further prevention of collapse effectively ensures the normal progress of the pit excavation.

[0059] like Figure 3-4 As shown, in this embodiment, the first adjustment mechanism 140 includes a sliding member 141, a fixing member 142, and a support member 143. The sliding member 141 is installed at the corner of the first waler frame 110 and the second waler frame 120, and the fixing member 142 is used to fix the sliding member 141. When the foundation pit support device moves downward, it is blocked at the corner, the fixing member 142 is released, the sliding member 141 is moved to make room, and then the support member 143 is installed on the corresponding sliding member 141. Finally, the fixing member 142 stops the sliding member 141 from sliding and fixes the sliding member 141 to the support member 143. In other words, when making way for an obstruction at a corner, first release the fixing of the fixing member 142, so that the sliding member 141 can move to make way for the obstruction. Then, install the supporting member 143 and the sliding member 141, and then fix the sliding member 141 to the supporting member 143, the first waler frame 110 and the second waler frame 120 respectively. The operation is simple and convenient.

[0060] like Figure 3 and Figure 5 As shown, in this embodiment, the first waler frame 110 includes a first horizontal waler 111, a second horizontal waler 112, a first vertical waler 113, and a second vertical waler 114; the first horizontal waler 111 and the first vertical waler 113 are installed and fixed; the second horizontal waler 112 and the second vertical waler 114 are installed and fixed; the first horizontal waler 111 and the first vertical waler 113 are located inside the second horizontal waler 112 and the second vertical waler 114 and together form a rectangular frame for excavation opening; the baffle 130 is located between the first horizontal waler 111 and the second horizontal waler 112, and between the first vertical waler 113 and the second vertical waler 114. The baffle 130 is positioned between the first horizontal waler 111 and the second horizontal waler 112, as well as the first longitudinal waler 113 and the second longitudinal waler 114. This ensures that the baffle 130 will not deviate when moving along the foundation pit towards the bottom of the pit, thus preventing the foundation pit excavation from deviating and affecting the size of the foundation pit.

[0061] like Figure 4 and Figure 6 As shown, in this embodiment, the second waler frame 120 includes a third horizontal waler 121 and a third vertical waler 122. The third horizontal waler 121 and the third vertical waler 122 are installed and fixed, forming a rectangular frame. The baffle 130 is located outside the third horizontal waler 121 and the third vertical waler 122, and the third horizontal waler 121 and the third vertical waler 122 make the baffle 130 contact the sidewall of the foundation pit. By positioning the baffle 130 outside the third horizontal waler 121 and the third vertical waler 122, with the outside of the third horizontal waler 121 and the third vertical waler 122 located inside the foundation pit, the baffle 130 can be tightly attached to the sidewall of the foundation pit and supported by the sidewall, preventing the foundation pit from collapsing and causing deformation of the lower side of the baffle 130.

[0062] like Figure 3-6As shown, in this embodiment, the sliding member 141 is respectively installed at both ends of the first horizontal purlin 111, the second horizontal purlin 112, the third horizontal purlin 121, the first longitudinal purlin 113, the second longitudinal purlin 114, and the third longitudinal purlin 122, and the sliding member 141 can slide along the corresponding first horizontal purlin 111, second horizontal purlin 112, third horizontal purlin 121, first longitudinal purlin 113, and second longitudinal purlin 114. The third longitudinal purlin 122 slides along its length; the fixing member 142 includes a first fixing block 142a and a second fixing block 142b; the sliding member 141 is fixed to the first transverse purlin 111, the second transverse purlin 112, the third transverse purlin 121, the first longitudinal purlin 113, the second longitudinal purlin 114, and the third longitudinal purlin 122 via the first fixing block 142a; adjacent sliding members 141 are connected by a second fixing block 142a. Block 142b is fixed, and support member 143 includes first support seat 143a and second support seat 143b; when the foundation pit support device moves downward, the corner is blocked, causing sliding member 141 to move, and the first fixing frame is installed on the sliding member 141 at the corresponding corner on the first waler frame 110, and fixed by the second fixing block 142b, and then fixed by the first fixing block 142a to the corresponding sliding member 141 with the first horizontal waler 111, the second horizontal waler 112, the first vertical waler 113, and the second vertical waler 114; similarly, the second fixing frame is installed on the sliding member 141 at the corresponding corner on the second waler frame 120 and fixed by the second fixing block 142b, and then fixed by the first fixing block 142a to the corresponding sliding member 141 with the third horizontal waler 121 and the third vertical waler 122. In other words, when it is necessary to make way for a corner, the sliding member 141 slides along the length of the corresponding first horizontal waler 111, second horizontal waler 112, third horizontal waler 121, first vertical waler 113, second vertical waler 114, and third vertical waler 122, thereby making way for the corresponding corner. Then, the corner is installed and fixed by the first support seat 143a and the second support seat 143b. This can prevent the corner from becoming loose due to lack of connection and can also block the obstruction to the outside.

[0063] like Figure 1 as well as Figure 3-6As shown, in this embodiment, the cross-sections of the first horizontal purlin 111, the second horizontal purlin 112, the third horizontal purlin 121, the first vertical purlin 113, the second vertical purlin 114, and the third vertical purlin 122 are C-shaped. The sliding member 141 is engaged with the corresponding first horizontal purlin 111, second horizontal purlin 112, third horizontal purlin 121, first vertical purlin 113, second vertical purlin 114, and third vertical purlin 122, and the sliding member 141 slides along the corresponding first horizontal purlin 111, second horizontal purlin 112, third horizontal purlin 121, first vertical purlin 113, second vertical purlin 114, and third vertical purlin 122. By using a snap-fit ​​sliding mechanism, the sliding component 141 is ensured not to detach from the corresponding first horizontal waler 111, second horizontal waler 112, third horizontal waler 121, first vertical waler 113, second vertical waler 114, and third vertical waler 122. This also reduces the difficulty of installation.

[0064] like Figure 3-8 As shown, in this embodiment, the sliding member 141 is provided with a first limiting hole 141a; the first horizontal purlin 111, the second horizontal purlin 112, the third horizontal purlin 121, the first vertical purlin 113, the second vertical purlin 114, and the third vertical purlin 122 are provided with a plurality of second limiting holes 1a. When the sliding member 141 moves along the first limiting hole 141a; the first horizontal purlin 111, the second horizontal purlin 112, the third vertical purlin 121, the first vertical purlin 113, the second vertical purlin 114, and the third vertical purlin 122 are provided with a plurality of second limiting holes 1a. After the three horizontal purlins 121, the first vertical purlin 113, the second vertical purlin 114, and the third vertical purlin 122 are moved, the first fixing block 142a fixes the sliding member 141 and the corresponding first horizontal purlin 111, second horizontal purlin 112, third horizontal purlin 121, first vertical purlin 113, second vertical purlin 114, and third vertical purlin 122 through the first limiting hole 141a and the second limiting hole 1a.

[0065] At the corner of the foundation pit support device 100, one of the sliding parts 141 is provided with a third limiting hole 141b, and the adjacent sliding part 141 is provided with a first mounting part 141c. The first mounting part 141c is provided with a fourth limiting hole 141d. The second fixing block 142b fixes the two adjacent sliding parts 141 through the third limiting hole 141b and the fourth limiting hole 141d.

[0066] like Figure 3-10As shown, in this embodiment, the first support base 143a and the second support base 143b are L-shaped, and baffles 130 that can move up and down are also inserted into the L-shapes. Second mounting members 143c are installed on the first support base 143a and the second support base 143b. The mounting members have a fifth limiting hole 143d. After the first support base 143a and the second support base 143b are installed with the sliding member 141, the second fixing block 142b is fixed via the third limiting hole 141b and the fifth limiting hole 143d, or the fourth limiting hole 141d and the fifth limiting hole 143d. The baffles 130 inserted into the first support base 143a and the second support base 143b can prevent the soil at the corner located below the obstruction from collapsing, and the baffles 130 can move downwards as the foundation pit is excavated.

[0067] The first fixing block 142a and the second fixing block 142b can be bolts or pins.

[0068] like Figure 1-2 As shown, in this embodiment, there are multiple baffles 130, which are further divided into multiple groups with gaps between adjacent groups. The first horizontal waler 111 and the second horizontal waler 112, as well as the first vertical waler 113 and the second vertical waler 114, are connected by connecting plates, with connecting plates 160 located between adjacent groups of baffles 130. Connecting the first horizontal waler 111 and the second horizontal waler 112, as well as the first vertical waler 113 and the second vertical waler 114, via connecting plates 160 ensures the stability of the first waler frame 110. Furthermore, dividing the baffles 130 into multiple groups also prevents the baffles 130 from tilting.

[0069] The connecting plate 160 can be connected by welding or bolting to connect the first horizontal waler 111 and the second horizontal waler 112 or the first longitudinal waler 113 and the second longitudinal waler 114.

[0070] like Figure 2 as well as Figure 11-12 As shown, in this embodiment, the second adjustment mechanism 150 includes a support plate 151 and multiple locking members 152; the number of locking members 152 is greater than or equal to three; the multiple locking members 152 are respectively installed on both sides of the support plate 151; when the baffle 130 is blocked by an obstacle, the support plate 151 is installed on the upper and lower sides of the obstacle, and the locking members 152 are engaged at the interval between two adjacent sets of baffles 130, and the support plate 151 and the baffle 130 are fixedly installed by the locking members 152. That is to say, when an obstacle is encountered at a non-corner location, the baffle 130 located on the upper side of the obstacle stops moving downward, causing the baffle 130 on the upper side of the obstacle to be unable to be supported by the second waler frame 120 and to be in a suspended state. Placing the support plate 151 on the upper and lower sides of the obstacle can prevent the sidewall of the pit located on the lower side of the obstacle from collapsing, and can also prevent the baffle 130 on the upper side of the obstacle from deforming due to suspension and sidewall collapse.

[0071] When the support plate 151 located on the upper side of the obstruction is installed, a support plate 151 is placed on the upper side of the obstruction, and the locking members 152 on both sides are placed in the gap between the two sets of baffles 130 adjacent to it. Then the support plate 151 and the baffle 130 are fixed by the locking members 152. Under the action of the support plate 151, the baffle 130 located on the upper side of the obstruction is blocked by the support plate 151, thereby preventing the baffle 130 on the upper side of the obstruction from being suspended and deformed.

[0072] When the support plate 151 located on the lower side of the barrier is installed, as the foundation pit is excavated, each time the excavation depth reaches the width of a support plate 151, a support plate 151 is placed on the lower side of the barrier, and the locking members 152 on both sides are placed in the interval between the two adjacent sets of baffles 130. Then, the support plate 151 is fixed to the baffles 130 by the locking members 152. Under the action of the support plate 151, the side wall of the foundation pit located on the lower side of the barrier is blocked by the support plate 151, thereby preventing the foundation pit located on the lower side of the barrier from collapsing during excavation.

[0073] like Figure 1-2 As shown, in this embodiment, there are 3-6 baffles 130 in each group, and the width of each baffle 130 is between 150mm and 200mm. By setting 3-6 baffles 130 and the width of the baffles 130 being between 150mm and 200mm, it is possible for the baffles 130 to move down easily, and it is also possible to ensure that the width between two adjacent groups of baffles 130 is moderate, so that the support plate 151 will not deform due to excessive width when supported by the support plate 151.

[0074] like Figure 11-12 As shown, in this embodiment, the locking member 152 includes an insert 152a and a locking block 152c. The insert 152a can be inserted into the soil of the pit sidewall, and the locking block 152c can rotate with the insert 152a to the outside of the baffle 130 and lock onto two adjacent baffles 130. By using the insert 152a, it can be inserted into the soil of the pit sidewall, so that the support plate 151 will not move towards the bottom of the pit with the baffle 130 under the action of the insert 152a. This ensures that the support plate 151 located above the obstruction will not push the obstruction, thus ensuring the stable progress of the pit excavation. Furthermore, by using the locking block to lock onto two adjacent baffles 130, it has a stable holding force, ensuring the support stability of the support plate 151.

[0075] The insertion end of the insert 152a is tapered, which makes it easy for the insert 152a to be inserted into the soil.

[0076] The locking element 152 also includes a stop block 152c and a handle 152d. The stop block 152c prevents the support plate 151 from detaching from the baffle 130 during installation, and the handle 152d facilitates operation by construction personnel, thus facilitating the installation and fixing of the support plate 151.

[0077] like Figure 1-2 As shown, in this embodiment, the foundation pit support device 100 further includes a jacking device 200, which is clamped between two opposing second longitudinal walers 114 and two opposing third longitudinal walers 122. That is, the jacking device 200 provides additional support between the two opposing second longitudinal walers 114 and the two opposing third longitudinal walers 122, ensuring their support strength and preventing deformation of the second longitudinal walers 114 and third longitudinal walers 122 due to excessive stress on both sides of the foundation pit.

[0078] like Figure 1-2 As shown, in this embodiment, the support 200 includes a hollow rod 201 and two round rods 202. The two round rods 202 are installed inside the hollow rod 201 and located at both ends of the hollow rod 201. The hollow rod 201 has internal threads, and the round rods 202 have external threads. The round rods 202 and the hollow rod 201 are rotatably connected by the internal and external threads. When the hollow rod 201 is rotated, the round rods 202 at both ends move simultaneously inward or outward from the hollow rod 201. The inward and outward movement of the round rods 202 at both ends can be achieved by rotating the hollow rod 201, which is simple to operate and easy to install.

[0079] like Figure 1-2 as well as Figure 4 and Figure 6 As shown, in this embodiment, both the third horizontal waler 121 and the third vertical waler 122 are composed of multiple waler sections. When obstructed by an obstacle, the third horizontal waler 121 and the third vertical waler 122 can be disassembled into multiple waler sections, allowing the waler sections to be moved to the underside of the obstacle and reinstalled. In other words, whenever an obstacle is encountered, the second waler frame 120 cannot directly cross it and needs to be disassembled and reinstalled. By using multiple waler sections, disassembly and installation are facilitated.

[0080] In summary, this invention provides a foundation pit support device. By arranging baffles, when encountering obstacles such as cement blocks, stones, or underground optical cables during foundation pit excavation, the corresponding baffles can be stopped from moving down in time, thus giving way to the obstacles. Furthermore, the baffles inside the foundation pit can be adjusted by the first and second adjusting components, thereby preventing the soil below the obstacles from collapsing. This device offers high safety and effectively ensures the normal progress of foundation pit excavation.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A foundation pit support device, characterized in that, include: The first waler frame is assembled at the excavation opening of the foundation pit; The second waler frame is installed inside the foundation pit; A baffle is arranged and installed between the first waler frame and the second waler frame. The baffle points into the pit and contacts the side wall of the pit. The baffle moves in a straight line relative to the bottom of the pit as the pit is excavated. The first adjustment mechanism is installed on the first waler frame and the second waler frame, and is used to adjust the corner of the first waler frame, the corner of the second waler frame, and the baffle located at the corner, so as to avoid the obstruction at the corner of the foundation pit; The second adjustment mechanism, installed on the baffle, is used to adjust the baffle except at the corner, so as to avoid obstacles in the foundation pit except at the corner. The first adjustment mechanism includes a sliding member, a fixing member, and a supporting member; The sliding member is installed at the corner of the first waler frame and the second waler frame, and the fixing member is used to fix the sliding member; When the foundation pit support device moves downward, it is blocked at the corner. The fixing of the fixing member is released, the sliding member is moved to make way, and then the support member is installed on the corresponding sliding member. Finally, the fixing member stops the sliding member from sliding and fixes the sliding member to the support member. The second adjustment mechanism includes a support plate and multiple locking components; the number of locking components is greater than or equal to three. Multiple locking components are respectively installed on both sides of the support plate; The support plate is installed on the upper and lower sides of the obstruction, and the locking element is engaged with the interval between two adjacent sets of the baffles. The first waler frame includes a first horizontal waler, a second horizontal waler, a first longitudinal waler, and a second longitudinal waler; The first horizontal waler and the first vertical waler are installed and fixed; the second horizontal waler and the second vertical waler are installed and fixed. The first horizontal waler and the first vertical waler are located inside the second horizontal waler and the second vertical waler and together form a rectangular frame for the excavation opening; the baffle is located between the first horizontal waler and the second horizontal waler and between the first vertical waler and the second vertical waler; The second waler frame includes a third horizontal waler and a third vertical waler; The third horizontal waler and the third vertical waler are installed and fixed, and the third horizontal waler and the third vertical waler together form a rectangular frame. The baffle is located outside the third horizontal waler and the third vertical waler, and the third horizontal waler and the third vertical waler make the baffle contact the side wall of the foundation pit. The sliding members are respectively installed at both ends of the first horizontal waler, the second horizontal waler, the third horizontal waler, the first longitudinal waler, the second longitudinal waler, and the third longitudinal waler, and the sliding members can slide along the length direction of the corresponding first horizontal waler, the second horizontal waler, the third horizontal waler, the first longitudinal waler, the second longitudinal waler, and the third longitudinal waler; The support member includes a first support base and a second support base; The first and second support seats are L-shaped, and baffles that can move up and down are also inserted into the L-shapes.

2. The foundation pit support device according to claim 1, characterized in that: There are multiple baffles, and the multiple baffles are divided into multiple groups with a gap between adjacent groups.

3. The foundation pit support device according to claim 2, characterized in that: The number of baffles in each group is 3-6, and the width of each baffle is between 150mm and 200mm.

4. The foundation pit support device according to claim 1, characterized in that: The locking element includes an insert and a locking block; The insert can be inserted into the soil on the side wall of the pit, and the locking block can rotate with the insert to move to the outside of the baffle and lock onto the two adjacent baffles.

5. The foundation pit support device according to claim 1, characterized in that: The foundation pit support device also includes a jacking device, which is clamped between two opposite second longitudinal walers and two opposite third longitudinal walers.

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