A foundation pit support device capable of ensuring verticality

Abstract

The present invention discloses a foundation pit support device capable of ensuring verticality. The support assembly includes a fixing member and a support member disposed on the fixing member, and the fixing member is rotatably connected to the support member; a driving assembly includes a rotating member disposed on the fixing member and a transmission member disposed on the support member, and the rotating member is in transmission connection with the transmission member; a connecting rod assembly is disposed between the fixing member and the support member and includes a connecting member, and the connecting member is rotatably connected to both the fixing member and the support member; an anti-tilting assembly includes a sliding member disposed on the fixing member, a support member having two ends respectively rotatably connected to the sliding member and the connecting member, and a locking member disposed on the fixing member and abutting against the sliding member. By providing a supporting force to the support plate of the support assembly through the anti-tilting assembly, the support plate can always be attached to the foundation pit, and the support plate will not tilt during the construction of the foundation pit, thereby achieving the effect of keeping the support plate stable in the vertical direction.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support, and in particular to a foundation pit support device that can ensure verticality in the vertical direction. Background Art

[0002] During the construction process, it is often necessary to excavate corresponding foundation pits according to the engineering quantity. A foundation pit is a temporary project, and its function is to provide a space so that the masonry operation of the foundation can be carried out at the designated position according to the design. A foundation pit is an earth pit excavated at the design position of the foundation according to the base elevation and the foundation plane size. Before excavation, the excavation plan should be determined based on geological and hydrological data, combined with the situation of nearby buildings on site, and waterproof and drainage work should be done well. Foundation pit support is a support, reinforcement, and protection measure adopted for the foundation pit side wall and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. Common foundation pit support methods include anchor-pull support, inclined column support, continuous vertical support, etc.

[0003] In the existing foundation pit protection method using inclined column support, it completely relies on the inclined column to resist the support plate in contact with the vertical wall of the foundation pit. However, during the construction process, the vertical wall in contact with the support plate will continuously apply pressure to the support plate due to the action of external forces or its own settlement. At this time, the pressure borne by the inclined column is relatively large, and the inclined column will inevitably deform, which will affect the stability of the support plate in the vertical direction and force the support plate to tilt towards the side away from the vertical wall of the foundation pit, thus affecting the construction. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title of the invention. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above and / or problems existing in the existing foundation pit support devices, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to solve the problem of the inclination of the support plate.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: A foundation pit support device capable of ensuring verticality, which includes a support assembly including a fixing member and a support member provided on the fixing member, and the fixing member is rotatably connected to the support member; a driving assembly including a rotating member provided on the fixing member and a transmission member provided on the support member, and the rotating member is in transmission connection with the transmission member; a connecting rod assembly provided between the fixing member and the support member, including a connecting member, and the connecting member is rotatably connected to both the fixing member and the support member; an anti-tilting assembly including a sliding member provided on the fixing member, a support member with both ends rotatably connected to the sliding member and the connecting member respectively, and a locking member provided on the fixing member and in contact with the sliding member.

[0008] As a preferred embodiment of the foundation pit support device of the present invention, wherein: the fixing member includes a base, at least one drainage groove is provided on the base, and one end of the drainage groove away from the support member is inclined towards the bottom of the base and penetrates through the side surface of the base away from the support member.

[0009] As a preferred embodiment of the foundation pit support device of the present invention, wherein: the support member includes a support plate, and reinforcing ribs corresponding to the drainage grooves are provided on the support plate, and the reinforcing ribs are adapted to be embedded in the drainage grooves.

[0010] As a preferred embodiment of the foundation pit support device of the present invention, wherein: the rotating member includes a rotating shaft rotatably installed on the base, a crank is provided at one end of the rotating shaft away from the support plate, a connection hole is provided at one end of the rotating shaft close to the support plate, and the central axis of the connection hole coincides with the central axis of the rotating shaft.

[0011] As a preferred embodiment of the foundation pit support device of the present invention, wherein: the transmission member includes a first worm rotatably installed on the base and extending into the connection hole, a first worm gear provided on the support plate and meshing with the first worm, a first elastic member provided in the connection hole and in contact with the first worm, a limiting groove provided on the inner wall of the connection hole, and a limiting block provided on the side wall of the worm and slidably connected to the limiting groove.

[0012] As a preferred embodiment of the foundation pit support device of the present invention, wherein: there are two connecting members, and the two connecting members are respectively provided on both sides of the base. The connecting member includes a first connecting rod and a second connecting rod. One end of the first connecting rod is rotatably connected to the base, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, and the other end of the second connecting rod is rotatably connected to the support plate.

[0013] As a preferred embodiment of the foundation pit support device of the present invention, the following is provided: There are two sliding members, and the two sliding members are respectively arranged in one-to-one correspondence with the two connecting members. The sliding member includes a slider seat arranged on the base and a slider slidably mounted on the slider seat.

[0014] As a preferred embodiment of the foundation pit support device of the present invention, the following is provided: There are two supporting members, and the two supporting members are respectively arranged in one-to-one correspondence with the two connecting members. The supporting member includes a support rod whose one end is rotatably connected to the rotational connection of the first connecting rod and the second connecting rod of the connecting member arranged corresponding thereto, and the other end is detachably connected to the slider of the sliding member arranged corresponding thereto.

[0015] As a preferred embodiment of the foundation pit support device of the present invention, the following is provided: The locking member includes a ratchet fixed on the rotating shaft, and a ratchet bar vertically arranged on the base and elastically connected to the base in both the horizontal and vertical directions. The ratchet is engaged with the ratchet bar, and the top of the ratchet bar abuts against the slider.

[0016] As a preferred embodiment of the foundation pit support device of the present invention, the following is provided: A second elastic member is arranged on the base to abut against the bottom of the ratchet bar, and a third elastic member is arranged on the side of the ratchet bar away from the ratchet to abut against the base.

[0017] The beneficial effect of the present invention is that the anti-tilting assembly provides a supporting force for the support plate of the support assembly, so that the support plate always fits against the foundation pit, and the support plate will not tilt during the construction of the foundation pit, thereby achieving the effect of keeping the support plate stable in the vertical direction. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0019] Figure 1 It is a scene diagram of the foundation pit support device.

[0020] Figure 2 It is a structural diagram of the foundation pit support device.

[0021] Figure 3 It is a structural diagram of the support assembly of the foundation pit support device.

[0022] Figure 4 It is a cross-sectional view of the support assembly of the foundation pit support device.

[0023] Figure 5 Another perspective view of the support components of the foundation pit support device.

[0024] Figure 6 for Figure 5 Magnified view of area A.

[0025] Figure 7 This is a structural diagram of the locking parts of the foundation pit support device.

[0026] Figure 8 This is an exploded view of the locking parts of the foundation pit support device.

[0027] Figure 9 Another perspective view of the locking parts of the foundation pit support device.

[0028] Figure 10 It is a front view of the locking part of the foundation pit support device. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1

[0033] Reference Figure 1 and Figure 2, which is the first embodiment of the present invention. This embodiment provides a foundation pit support device that can ensure vertical perpendicularity. It should be noted that the cross-sectional shape of the foundation pit in this embodiment is L-shaped, and the foundation pit includes a vertical wall and a horizontal wall. The foundation pit support device includes a support assembly 100, a drive assembly 200, a connecting rod assembly 300, and an anti-tilt assembly 400. The drive assembly 200 drives the support assembly 100 to fit against the vertical wall of the foundation pit. The vertical wall of the foundation pit sequentially transmits pressure to the anti-tilt assembly 400 through the support assembly 100 and the connecting rod assembly 300. The anti-tilt assembly 400 acts on the support assembly 100, enabling the support assembly 100 to spontaneously fit against the foundation pit. The greater the pressure exerted by the vertical wall of the foundation pit on the support assembly 100, the tighter the support assembly 100 fits against the foundation pit.

[0034] Specifically, the support assembly 100 includes a fixing member 101 and a support member 102 provided on the fixing member 101. The fixing member 101 is rotatably connected to the support member 102. One end of the support member 102 in this embodiment is rotatably connected to one end of the fixing member 101 through a rotating shaft. The fixing member 101 is horizontally fixed on the horizontal wall of the foundation pit, and the support member 102 abuts against the vertical wall of the foundation pit. In use, the fixing member 101 of the support assembly 100 is fixed on the horizontal wall of the foundation pit, the support member 102 abuts against the vertical wall of the foundation pit, and the support member 102 is used to support the vertical wall of the foundation pit.

[0035] Preferably, the drive assembly 200 includes a rotating member 201 provided on the fixing member 101 and a transmission member 202 provided on the support member 102. The rotating member 201 is in transmission connection with the transmission member 202. In use, the rotating member 201 rotates and acts on the transmission member 202, causing the transmission member 202 to also rotate. With the cooperation of the rotating member 201 and the transmission member 202, the support member 102 rotatably connected to the fixing member 101 rotates until the support member 102 rotates to a vertical position and abuts against the vertical wall of the foundation pit.

[0036] Preferably, the connecting rod assembly 300 is provided between the fixing member 101 and the support member 102 and includes a connecting member 301. The connecting member 301 is rotatably connected to both the fixing member 101 and the support member 102. In use, the connecting member 301 is used to connect the fixing member 101 and the support member 102.

[0037] Preferably, the anti-tilting component 400 includes a sliding member 401 disposed on the base 101a, a support member 402 having two ends rotatably connected to the sliding member 401 and the connecting member 301 respectively, and a locking member 403 disposed on the base 101a and abutting against the sliding member 401. During use, the support plate 102a pressed by the soil on the vertical wall of the foundation pit transmits the force to the support member 402 of the anti-tilting component 400 through the link assembly 300. The support member 402 then transmits the force to the sliding member 401, and the sliding member 401 causes the locking member 403 abutting against the sliding member 401 to move, thereby forcing the support member 102 to maintain a vertical state and preventing the support member 102 from tilting.

[0038] During use, first, the fixing member 101 of the support assembly 100 is fixed on the horizontal wall of the foundation pit. Secondly, the rotating member 201 rotates and acts on the transmission member 202, causing the transmission member 202 to also rotate. With the cooperation of the rotating member 201 and the transmission member 202, the support member 102 rotatably connected to the fixing member 101 rotates until the support member 102 rotates to a vertical position and abuts against the vertical wall of the foundation pit. Then, the connecting member 301 connects the fixing member 101 and the support member 102 to provide a certain supporting force to the support member 102. Finally, the support plate 102a pressed by the soil on the vertical wall of the foundation pit transmits the force to the support member 402 of the anti-tilting component 400 through the link assembly 300. The support member 402 then transmits the force to the sliding member 401, and the sliding member 401 causes the locking member 403 abutting against the sliding member 401 to move, thereby forcing the support member 102 to maintain a vertical state and preventing the support member 102 from tilting.

[0039] Embodiment 2

[0040] Referring to Figures 3 to 10 , this is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0041] Specifically, the fixing member 101 includes a base 101a, and at least one drainage groove 101b is provided on the base 101a. In this embodiment, eight drainage grooves 101b are provided. The central axes of the eight drainage grooves 101b are perpendicular to the vertical wall of the foundation pit. One end of the drainage groove 101b away from the support member 102 is inclined towards the bottom of the base 101a and penetrates through the side surface of the base 101a on the side away from the support member 102. When used in rainy weather, rainwater runs along the contour of the drainage groove 101b from the side surface of the base 101a on the side away from the support member 102, preventing water from accumulating on the base 101a.

[0042] Preferably, the support member 102 includes a support plate 102a. The support plate 102a is provided with reinforcing ribs 102b corresponding to the drain grooves 101b. The reinforcing ribs 102b are adapted to be embedded in the drain grooves 101b. The reinforcing ribs 102b can not only strengthen the structure of the support plate 102a and prevent the support plate 102a from deforming under the pressure of the soil on the vertical wall of the foundation pit, but also reduce the overall height of the support plate 102a and the base 101a in the closed state when the support plate 102a is stored on the base 101a, facilitating storage and transportation.

[0043] Preferably, the rotating member 201 includes a rotating shaft 201a rotatably mounted on the base 101a. A crank 201b is provided at one end of the rotating shaft 201a away from the support plate 102a. A connection hole 201c is provided at one end of the rotating shaft 201a close to the support plate 102a. The central axis of the connection hole 201c coincides with the central axis of the rotating shaft 201a. During use, the user rotates the crank 201b by hand, and the crank 201b drives the rotating shaft 201a to rotate.

[0044] Preferably, the transmission member 202 includes a worm 202a rotatably mounted on one side of the base 101a and extending into the connection hole 201c, a worm gear 202b provided on the support plate 102a and meshing with the worm 202a, a first elastic member 202c provided in the connection hole 201c and abutted against the worm 202a, a limiting groove 202d provided on the inner wall of the connection hole 201c, and a limiting block 202e provided on the side wall of the worm 202a and slidably connected to the limiting groove 202d. By manually pushing the rotating shaft 201a inward, the position of the rotating shaft 201a can be adjusted. Under the action of the first elastic member 202c, the rotating shaft 201a can return to its original position. When the support plate 102a needs to be unfolded from the base 101a, instead of pushing the rotating shaft 201a inward, the crank 201b is directly rotated. The crank 201b drives the rotating shaft 201a to rotate. The rotating shaft 201a drives the worm 202a to rotate under the cooperation of the limiting groove 202d and the limiting block 202e. The worm 202a drives the worm gear 202b to rotate, and the worm gear 202b drives the support plate 102a to rotate, so that the support plate 102a opens from the base 101a.

[0045] Preferably, a worm 202a is also provided on the other side of the base 101a. This worm 202a is also rotatably mounted on the base 101a, and a worm gear 202b meshing with it is also provided on the support member 102. Sprockets are provided on both sides of the worm 202a, and the sprockets on the two worms 202a are connected by a chain. When the support plate 102a is opened, the worm gears 202b on both sides rotate simultaneously through the chain, driving the corresponding worm gears 202b to rotate, thereby driving the support plate 102a to rotate, making the forces on both sides of the support plate 102a uniform and facilitating the opening of the support plate 102a.

[0046] Preferably, there are two connecting members 301. The two connecting members 301 are respectively arranged on both sides of the base 101a. The connecting member 301 includes a first connecting rod 301a and a second connecting rod 301b. One end of the first connecting rod 301a is rotatably connected to the base 101a, the other end of the first connecting rod 301a is rotatably connected to one end of the second connecting rod 301b, and the other end of the second connecting rod 301b is rotatably connected to the support plate 102a. A through groove for storage is provided on the first connecting rod 301a. When the support plate 102a is stored on the base 101a, the second connecting rod 301b also rotates and is stored in the through groove on the first connecting rod 301a.

[0047] During use, the user rotates the crank 201b manually, and the crank 201b drives the rotating shaft 201a to rotate. The rotating shaft 201a drives the worm 202a to rotate under the cooperation of the limit groove 202d and the limit block 202e. The worm 202a drives the worm gear 202b to rotate, and the worm gear 202b drives the support plate 102a to rotate, so that the support plate 102a opens from the base 101a until the support plate 102a abuts against the vertical wall of the foundation pit.

[0048] Embodiment 3

[0049] Refer to Figures 3 to 10 , which is the third embodiment of the present invention, and this embodiment is based on the first two embodiments.

[0050] Specifically, there are two sliding members 401. The two sliding members 401 are respectively arranged in one-to-one correspondence with the two connecting members 301. The sliding member 401 includes a slider seat 401a provided on the base 101a and a slider 401b slidably mounted on the slider seat 401a. A chute is provided on the slider seat 401a, and the slider 401b can slide reciprocally along the direction of the chute.

[0051] Preferably, there are two support members 402, and the two support members 402 are respectively arranged in one-to-one correspondence with the two connecting members 301. The support member 402 includes a support rod 402a. One end of the support rod 402a is rotatably connected to the rotating connection of the first connecting rod 301a and the second connecting rod 301b of the corresponding connecting member 301 through a pin shaft. At the same time, a through groove for storage is also provided on the second connecting rod 301b. When the support plate 102a is stored on the base 101a, the support rod 402a is stored in the through groove on the second connecting rod 301b. When the support plate 102a is opened, the support rod 402a is manually taken out from the through groove on the second connecting rod 301b, the support rod 402a is abutted against the slider 401b, and the support rod 402a and the slider 401b are rotatably connected through a pin shaft to realize the detachable connection between the support rod 402a and the slider 401b.

[0052] Preferably, the locking member 403 includes a ratchet wheel 403a fixed on the rotating shaft 201a and a ratchet bar 403b vertically arranged on the base 101a. The ratchet wheel 403a meshes with the ratchet bar 403b, and the top of the ratchet bar 403b abuts against the slider 401b. When the support rod 402a pushes the slider 401b to slide, the slider 401b can provide a downward component force to the ratchet bar 403b during the movement, so that the ratchet bar 403b can move vertically downward, the ratchet bar 403b drives the ratchet wheel 403a to rotate, the ratchet wheel 403a drives the worm 202a to rotate, the worm 202a drives the worm gear 202b to rotate, and then drives the support plate 102a to rotate, so that the support plate 102a is continuously subjected to a force that forces the support plate 102a to fit against the vertical wall of the foundation pit.

[0053] Furthermore, the ratchet bar 403b is slidably connected to the base 101a. A second elastic member 403c that abuts against the bottom of the ratchet bar 403b is provided on the base 101a. The second elastic member 403c in this embodiment is a spring. A third elastic member 403d that abuts against the base 101a is provided on the side of the ratchet bar 403b. The third elastic member 403d includes an elastic member installation groove and an inner spring. The ratchet bar 403b is arranged in the elastic member installation groove, and the inner spring is located between the ratchet bar 403b and the elastic member installation groove. The elastic member installation groove is slidably connected to the ratchet bar 403b. A limiting strip is provided on the side of the elastic member installation groove that is slidably connected to the base 101a. A groove that is vertically arranged and cooperates with the limiting strip is provided on the base 101a, so that the elastic member installation groove can slide vertically along the direction of the groove, so that the ratchet bar 403b can move vertically up and down, and the cooperation of the groove and the limiting strip can also prevent the ratchet bar 403b from tilting, so as to realize the elastic connection between the ratchet bar 403b and the base 101a in both the horizontal and vertical directions.

[0054] When the support plate 102a needs to be stored, first disconnect the support rod 402a of the support member 402 from the slider 401b, then store the support rod 402a in the through groove of the second connecting rod 301b, and then push the rotating shaft 201a inward so that the ratchet wheel 403a on the rotating shaft 201a is disengaged from the ratchet bar 403b on the base 101a. Rotate the crank 201b in the reverse direction, so that the rotating shaft 201a rotates in the reverse direction, driving the worm 202a to rotate in the reverse direction, driving the worm wheel 202b to rotate in the reverse direction, thereby causing the support plate 102a to rotate towards the base 101a until the storage of the support plate 102a is completed.

[0055] To facilitate the understanding of the technical solution of the present invention, the following briefly describes its working process:

[0056] When the support plate 102a needs to be unfolded, first fix the fixing member 101 of the support assembly 100 on the horizontal wall of the foundation pit. Secondly, the rotating member 201 rotates and acts on the transmission member 202, causing the transmission member 202 to also rotate. With the cooperation of the rotating member 201 and the transmission member 202, the support member 102 rotatably connected to the fixing member 101 is rotated until the support member 102 rotates to the vertical position and abuts against the vertical wall of the foundation pit. Then the connecting member 301 connects the base 101a and the support plate 102a to provide a certain supporting force for the support member 102.

[0057] When the vertical wall presses the support plate 102a, the soil on the vertical wall of the foundation pit presses the support plate 102a, and the support plate 102a presses the link assembly 300, causing the first link 301a and the second link 301b of the link assembly 300 to have a tendency to rotate downward and close. The rotating connection of the first link 301a and the second link 301b then transmits the force to the support rod 402a of the anti-tilting assembly 400. The support rod 402a pushes the slider 401b to slide, and the slider 401b can provide a downward component force for the ratchet bar 403b during the movement, enabling the ratchet bar 403b to move vertically downward, causing the ratchet bar 403b to drive the ratchet wheel 403a to rotate, the ratchet wheel 403a to drive the worm 202a to rotate, the worm 202a to drive the worm wheel 202b to rotate, and further drive the support plate 102a to rotate, so that the support plate 102a continuously receives a force that forces the support plate 102a to fit against the vertical wall of the foundation pit, making the support plate 102a closely fit against the vertical wall of the foundation pit.

[0058] When the support plate 102a needs to be stored, first disconnect the support rod 402a of the support member 402 from the slider 401b, then store the support rod 402a in the through groove of the second connecting rod 301b, and then push the rotating shaft 201a inward so that the ratchet wheel 403a on the rotating shaft 201a is disengaged from the ratchet bar 403b on the base 101a. Rotate the crank 201b in the reverse direction, so that the rotating shaft 201a rotates in the reverse direction, driving the worm 202a to rotate in the reverse direction, driving the worm gear 202b to rotate in the reverse direction, so that the support plate 102a rotates towards the base 101a until the storage of the support plate 102a is completed.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A foundation pit support device capable of ensuring verticality, characterized in that: including a support assembly (100), comprising a fixing member (101) and a support member (102) provided on the fixing member (101), the fixing member (101) being rotatably connected to the support member (102); a driving assembly (200), comprising a rotating member (201) provided on the fixing member (101) and a transmission member (202) provided on the support member (102), the rotating member (201) being in transmission connection with the transmission member (202), the rotating member (201) rotating and acting on the transmission member (202) to cause the transmission member (202) to also rotate, and under the cooperation of the rotating member (201) and the transmission member (202), the support member (102) rotatably connected to the fixing member (101) rotates until the support member (102) rotates to a vertical position and abuts against the vertical wall of the foundation pit; a connecting rod assembly (300) provided between the fixing member (101) and the support member (102), comprising a connecting member (301), the connecting member (301) being rotatably connected to both the fixing member (101) and the support member (102), the connecting member (301) comprising a first connecting rod (301a) and a second connecting rod (301b); an anti-tilting assembly (400), comprising a sliding member (401) provided on the fixing member (101), a support member (402) rotatably connected to both ends of the sliding member (401) and the connecting member (301), and a locking member (403) provided on the fixing member (101) and abutting against the sliding member (401), the support member (402) comprising a support rod (402a) rotatably connected to the rotational connection of the first connecting rod (301a) and the second connecting rod (301b) of the connecting member (301) corresponding thereto at one end and detachably connected to the sliding member (401) corresponding thereto at the other end; the locking member (403) comprises a ratchet wheel (403a) fixed on the rotating member (201) and a ratchet bar (403b) vertically provided on the fixing member (101) and elastically connected to the fixing member (101) in both the horizontal and vertical directions, the ratchet wheel (403a) meshing with the ratchet bar (403b), and the top of the ratchet bar (403b) abutting against the sliding member (401).

2. The foundation pit support device according to claim 1, characterized in that: the fixing member (101) comprises a base (101a), at least one drain groove (101b) being provided on the base (101a), one end of the drain groove (101b) away from the support member (102) being inclined towards the bottom of the base (101a) and penetrating through the side surface of the base (101a) on the side away from the support member (102).

3. The foundation pit support device according to claim 2, characterized in that: the support member (102) comprises a support plate (102a), reinforcing ribs (102b) corresponding to the drain grooves (101b) being provided on the support plate (102a), the reinforcing ribs (102b) being adapted to be embedded in the drain grooves (101b).

4. The foundation pit support device according to claim 3, characterized in that: The rotating member (201) includes a rotating shaft (201a) rotatably mounted on the base (101a). One end of the rotating shaft (201a) away from the support plate (102a) is provided with a crank (201b), and one end of the rotating shaft (201a) close to the support plate (102a) is provided with a connection hole (201c). The central axis of the connection hole (201c) coincides with the central axis of the rotating shaft (201a).

5. The foundation pit support device according to claim 4, characterized in that: The transmission member (202) includes a worm (202a) rotatably mounted on the base (101a) and extending into the connection hole (201c), a worm wheel (202b) arranged on the support plate (102a) and meshing with the worm (202a), a first elastic member (202c) arranged in the connection hole (201c) and abutting against the worm (202a), a limiting groove (202d) arranged on the inner wall of the connection hole (201c), and a limiting block (202e) arranged on the side wall of the worm (202a) and slidably connected with the limiting groove (202d).

6. The foundation pit support device according to claim 4 or 5, characterized in that: There are two connecting members (301). The two connecting members (301) are respectively arranged on both sides of the base (101a). One end of the first connecting rod (301a) is rotatably connected with the base (101a), the other end of the first connecting rod (301a) is rotatably connected with one end of the second connecting rod (301b), and the other end of the second connecting rod (301b) is rotatably connected with the support plate (102a).

7. The foundation pit support device according to claim 6, characterized in that: There are two sliding members (401). The two sliding members (401) are respectively arranged in one-to-one correspondence with the two connecting members (301). The sliding member (401) includes a slider seat (401a) arranged on the base (101a), and a slider (401b) slidably mounted on the slider seat (401a).

8. The foundation pit support device according to claim 7, characterized in that: There are two supporting members (402). The two supporting members (402) are respectively arranged in one-to-one correspondence with the two connecting members (301).

9. The foundation pit support device according to claim 8, wherein: The locking member (403) includes a ratchet wheel (403a) fixed on the rotating shaft (201a), a ratchet bar (403b) vertically arranged on the base (101a) and elastically connected with the base (101a) in both the horizontal and vertical directions. The ratchet wheel (403a) meshes with the ratchet bar (403b), and the top of the ratchet bar (403b) abuts against the slider (401b).

10. The foundation pit support device according to claim 9, characterized in that: A second elastic member (403c) is arranged on the base (101a) and abuts against the bottom of the ratchet bar (403b). A third elastic member (403d) is arranged on the side of the ratchet bar (403b) away from the ratchet wheel (403a) and abuts against the base (101a).

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