A foundation pit support structure

Abstract

The present application discloses a foundation pit support structure, which relates to the technical field of foundation pit support, including a support plate, a plurality of water absorbing parts and a plurality of positioning rods; a plurality of mounting grooves are provided on one side of the support plate, and a plurality of the water absorbing parts are respectively arranged in the plurality of mounting grooves; a plurality of through holes are provided on the support plate, and one end of the positioning rod has a spike, and after the spike penetrates the soil at the bottom of the foundation pit, the part of the positioning rod located in the through hole blocks the opening at the bottom of the through hole; a plurality of water spaces, a plurality of first seepage holes and a plurality of second seepage holes are also provided inside the support plate; the water space is connected to the mounting grooves through a plurality of the first seepage holes, and the water space is connected to the through holes through a plurality of the second seepage holes. The present application can effectively support foundation pits with high surrounding soil humidity, and can effectively reduce the probability of water infiltration.

Description

Technical Field

[0001] The present application relates to the technical field of foundation pit support, and in particular to a foundation pit support structure. Background Art

[0002] Foundation pit support is designed to ensure the overall safety of the underground structure construction process and its surrounding environment. It involves the support, reinforcement and protection of the side walls of the foundation pit and its adjacent environment. In promoting the construction of underground structures and maintaining the safety of the surrounding environment of the foundation pit, it is crucial to implement effective support and reinforcement measures for the side walls of the foundation pit. Especially in deep foundation pit operations, due to its large excavation depth, failure to properly support and protect the side walls of the foundation pit will cause serious safety hazards.

[0003] Existing foundation pit support structures usually use structures that are spliced ​​together to fit the inner wall of the foundation pit to form a wall structure to support the foundation pit (such as the Chinese invention patent "A deep foundation pit support device" disclosed in announcement number CN118390543B), which can effectively support the inner wall of the foundation pit to prevent collapse.

[0004] However, when the soil around the foundation pit is affected by rainfall or has high humidity due to the characteristics of the soil itself, the tendency of the foundation pit to collapse and deform increases. At this time, the supporting effect of the foundation pit support structure on the foundation pit will be more challenged. At the same time, the moisture in the soil can easily penetrate through the gaps between the foundation pit support structures, thus affecting the construction inside the foundation pit. Summary of the invention

[0005] The present application provides a foundation pit support structure, which can effectively support the foundation pit with high moisture in the surrounding soil, and can effectively reduce the probability of water infiltration.

[0006] The present application provides a foundation pit support structure, which adopts the following technical solution:

[0007] A foundation pit support structure comprises a support plate, a plurality of water absorbing members and a plurality of positioning rods;

[0008] A plurality of mounting grooves are provided on one side of the support plate, the mounting grooves penetrate the end surface of the support plate to form an opening, and the plurality of water absorbing members are respectively arranged in the plurality of mounting grooves;

[0009] The support plate is provided with a plurality of through holes for inserting the positioning rod, and one end of the positioning rod has a spike. After the spike penetrates the soil at the bottom of the foundation pit, the peripheral side surface of the portion of the positioning rod located in the through hole fits against the hole wall of the through hole, thereby blocking the opening at the bottom of the through hole;

[0010] The support plate is also provided with a plurality of water-passing spaces, a plurality of first water seepage holes and a plurality of second water seepage holes; the water-passing spaces are connected to the mounting grooves through the plurality of first water seepage holes, and the water-passing spaces are connected to the through holes through the plurality of second water seepage holes.

[0011] By adopting the above technical scheme, when the soil humidity around the foundation pit is high, the water absorbing member can timely and effectively absorb the moisture around the supporting plate, and the moisture absorbed by the water absorbing member can enter the perforation through the first seepage hole, the water passing space and the second seepage hole in turn. The water in the perforation can exert a downward force on the positioning rod, thereby effectively improving the position stability of the positioning rod to ensure the supporting effect of the supporting plate on the foundation pit, and can effectively support the foundation pit with high surrounding soil humidity, and at the same time can effectively reduce the probability of water infiltration.

[0012] Optionally, the interior of the positioning rod has a cavity, and the peripheral surface of the positioning rod is provided with a plurality of through holes; after the spike penetrates into the soil at the bottom of the foundation pit, the end of the cavity away from the spike is connected to the through hole, and the cavity can be connected to a plurality of adjacent second seepage holes through the plurality of through holes.

[0013] By adopting the above technical solution, the moisture entering the perforation can accumulate in the cavity, so that the moisture entering the perforation can easily exert force on the positioning rod, and at the same time can effectively reduce the probability of moisture infiltrating through the gap between the positioning rod and the perforation wall.

[0014] Optionally, a positioning block is extended outwardly along the radial direction of one side of the positioning rod, and a positioning groove adapted to the positioning block is formed on the hole wall of the perforation of the support plate;

[0015] After the spike penetrates the soil at the bottom of the foundation pit and the positioning block is engaged with the positioning groove, the plurality of through holes are used to connect the cavity with the adjacent plurality of the second water seepage holes.

[0016] By adopting the above technical solution, the position stability of the positioning rod after being inserted into the perforation can be improved, and at the same time, the cavity can be easily connected to the water space through the through hole and the second water seepage hole, thereby improving the reliability of the water absorbed by the water absorbent entering the cavity for storage.

[0017] Optionally, a plurality of the water-passing spaces can communicate with each other through a plurality of the second water seepage holes, a plurality of the through holes and a plurality of the cavities.

[0018] By adopting the above technical solution, the amount of water in multiple cavities in multiple positioning rods can be made the same, so that the effects of water pressure on multiple positioning rods can be equal, thereby improving the reliability of the positioning effect of multiple positioning rods on the overall support plate.

[0019] Optionally, it further comprises a plurality of covers and a plurality of pressing components, and the plurality of pressing components correspond to the plurality of covers one by one;

[0020] The cover is detachably connected to the support plate, and a plurality of the cover corresponds to a plurality of the through holes one by one; after the cover is connected to the support plate, the cover covers the opening at the top of the corresponding through hole;

[0021] The pressing assembly includes a frame and abutment; the frame is arranged on the cover, and the abutment is arranged on the frame; after the cover is connected to the support plate, the frame is located in the through hole, the abutment is located in the positioning groove, and the end of the abutment away from the frame contacts and abuts against the top of the positioning block of the positioning rod.

[0022] By adopting the above technical solution, the cover can effectively prevent external impurities from entering the perforation, thereby effectively reducing the probability of perforations, cavities and through holes being blocked; at the same time, the pressing assembly can further improve the position stability of the positioning rod after being inserted into the perforation, thereby effectively improving the reliability of the support plate in supporting the foundation pit.

[0023] Optionally, the pressing assembly further includes a driving member, a linkage member and a floating member;

[0024] The abutment is slidably connected to the positioning rod, and the sliding direction of the abutment is the same as the extension direction of the positioning groove; the linkage is rotatably connected to the frame, and the rotation axis of the linkage is perpendicular to the sliding direction of the abutment; the driving member is slidably connected to the frame, and the sliding direction of the driving member is parallel to the sliding direction of the abutment; the abutment and the driving member both have a rack structure, the linkage has a gear structure meshing with the rack structure, and the abutment and the driving member slide in opposite directions synchronously through the linkage; the floating member is arranged at one end of the driving member away from the frame, and is located in the cavity.

[0025] By adopting the above technical solution, after the moisture in the cavity contacts the floating part, the floating part has a tendency to drive the driving part to move upward due to the buoyancy, so that the decreasing part can have a tendency to move downward through the linkage part, thereby further improving the position stability of the positioning rod after the positioning rod is inserted into the hole, and reducing the probability of the positioning rod moving upward under the influence of geological movement.

[0026] Optionally, it further comprises a plurality of movable parts, and the plurality of movable parts correspond one-to-one to the plurality of mounting slots;

[0027] The movable part is located on a side of the water absorbing part away from the supporting plate, and is penetrated by a plurality of filtering holes for water to enter the mounting groove; the movable part is movably matched with the mounting groove, and when the movable part moves to an extreme position in a direction away from the water absorbing part, the movable part is still connected to the supporting plate.

[0028] By adopting the above technical solution, the movable part can prevent the water-absorbing part from directly contacting the soil, thereby reducing the probability that the water-absorbing part is affected by the soil and its water absorption effect is affected; at the same time, the movable part can squeeze the water-absorbing part when affected by geological movement, thereby promoting the water absorbed by the water-absorbing part to enter the water-passing space, thereby enabling the water-absorbing part to maintain a strong water absorption effect.

[0029] Optionally, the water absorbing member can fill the installation groove after absorbing water.

[0030] By adopting the above technical solution, when the water absorbent member absorbs water and expands to the point of contact with the movable member, the movable member has a limiting effect on it. The water absorbent member continues to absorb water and will be squeezed into the water-passing space by the force of the movable member, thereby further enabling the water absorbent member to maintain a strong water absorption effect.

[0031] Optionally, the movable member is connected to the water absorbing member, and the movable member moves with the expansion and contraction of the water absorbing member.

[0032] By adopting the above technical scheme, the effect of the movable part squeezing the water absorbing part to drain water due to geological movement can be effectively improved, and at the same time, the effect of the movable part isolating the soil on the water absorbing part can be improved, and the water absorbing part can be limited to drain water only after it expands to a certain extent after absorbing water, so as to ensure the water absorption efficiency of the water absorbing part.

[0033] Optionally, when the movable member moves to an extreme position in a direction away from the water absorbing member, a portion of the movable member is located outside the mounting groove.

[0034] By adopting the above technical solution, after the part of the movable part located outside the installation groove is inserted into the soil, the position stability of the support plate relative to the foundation pit can be further improved; at the same time, the movable part is more easily affected by geological movement and squeezes the water absorbing part, thereby further improving the drainage effect of the movable part squeezing the water absorbing part due to geological movement.

[0035] In summary, the present application includes at least one of the following beneficial effects:

[0036] 1. It can effectively support the foundation pit with high surrounding soil moisture, and at the same time effectively reduce the probability of moisture in the soil infiltrating into the foundation pit;

[0037] 2. It can absorb the moisture in the soil around the support plate in time, store the moisture inside the support plate and use it to enhance the support effect of the support plate on the foundation pit;

[0038] 3. It can make the water absorbing parts maintain a strong water absorbing effect for a long time, thereby improving the stability and reliability of the supporting effect of the supporting plate on the foundation pit with high soil moisture;

[0039] 4. As more and more water is stored inside the support plate, the position stability of the support plate in the foundation pit can be strengthened, and the reliability of its supporting effect on the foundation pit will also be strengthened. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of a foundation pit support structure after construction in an embodiment of the present application;

[0041] Figure 2 It is a structural schematic diagram of a foundation pit support structure according to an embodiment of the present application;

[0042] Figure 3 yes Figure 1 The cross-sectional view along the AA line;

[0043] Figure 4 yes Figure 3 The cross-sectional view along the BB line;

[0044] Figure 5 yes Figure 3 The cross-sectional view along the CC line;

[0045] Figure 6 yes Figure 3 Enlarged view of point D in the middle.

[0046] Explanation of the reference numerals in the accompanying drawings: 1. Support plate; 11. Perforation; 12. Mounting groove; 13. Water-passing space; 14. First seepage hole; 15. Second seepage hole; 16. Positioning groove; 2. Positioning rod; 21. Spike; 22. Cavity; 23. Through hole; 24. Positioning block; 3. Water-absorbing part; 4. Movable part; 41. Filter hole; 5. Cover; 6. Pressing assembly; 61. Frame; 62. Abutment part; 63. Driving part; 64. Linkage part; 65. Floating part; 7. Foundation pit. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-6 This application is described in further detail.

[0048] Reference Figure 1 and Figure 2 The embodiment of the present application discloses a foundation pit support structure, which is used to provide a stable support effect for a foundation pit 7 with high surrounding soil moisture, and can effectively reduce the probability of moisture in the soil infiltrating into the foundation pit 7.

[0049] Reference Figure 3 and Figure 4 The foundation pit support structure includes a support plate 1, a plurality of positioning rods 2, a plurality of water absorbing parts 3, a plurality of movable parts 4, a plurality of sealing covers 5 and a plurality of pressing components 6. Among them, the support plate 1 is used to fit against the inner wall of the foundation pit 7, so as to support the foundation pit 7; the positioning rod 2 is used to strengthen the connection between the support plate 1 and the soil at the bottom of the foundation pit 7, so as to improve the position stability of the support plate 1 in the foundation pit 7; the water absorbing parts 3 are used to absorb moisture in the soil around the support plate 1, so as to reduce the probability of moisture in the soil penetrating into the foundation pit 7; the movable parts 4 are used to protect the water absorbing parts 3, and at the same time can help the water absorbing parts 3 squeeze out, collect and store the absorbed water; the sealing cover 5 can effectively prevent external impurities from entering the interior of the support plate 1, so as to reduce the probability of impurities entering and affecting the water circulation inside the support plate 1; the pressing component 6 can press the positioning rod 2, so as to improve the positioning effect of the positioning rod 2 on the support plate 1.

[0050] Reference Figure 3 and Figure 4 The supporting plate 1 is a rectangular plate-shaped structure as a whole. After the supporting plate 1 is installed in the foundation pit 7, the length direction of the supporting plate 1 is vertical, the bottom of the supporting plate 1 is in contact with the bottom of the foundation pit 7, and the surface of one side of the supporting plate 1 in the thickness direction is in contact with the inner wall of one side of the foundation pit 7.

[0051] The positioning rod 2 is a cylindrical structure as a whole, and the support plate 1 is provided with a plurality of through holes 11 adapted to the positioning rod 2, the axis of the through hole 11 is parallel to the length direction of the support plate 1, and the plurality of through holes 11 are evenly spaced on the support plate 1 along the width direction of the support plate 1. In this embodiment, preferably, the support plate 1 is provided with a total of three through holes 11.

[0052] One end of the positioning rod 2 in the length direction has a spike 21 pointing outward along the axis, which makes it easy for the positioning rod 2 to be partially inserted into the soil at the bottom of the foundation pit 7 through the spike 21 after being inserted into the through hole 11. At this time, the end of the positioning rod 2 away from the spike 21 will be completely located in the through hole 11, and the peripheral side surface of the part of the positioning rod 2 located in the through hole 11 will fit against the inner wall of the through hole 11.

[0053] A plurality of mounting grooves 12 for mounting the water absorbing member 3 and the movable member 4 are provided on one side of the support plate 1 in the thickness direction for fitting against the inner wall of the foundation pit 7. The mounting grooves 12 extend along the length direction of the support plate 1. The mounting grooves 12 penetrate one side of the support plate 1 in the thickness direction to form an opening, and the plurality of mounting grooves 12 are evenly spaced on the support plate 1 along the width direction of the support plate 1. In this embodiment, preferably, a total of four mounting grooves 12 are provided on the support plate 1, and the positions of the four mounting grooves 12 and the three through holes 11 on the support plate 1 are staggered along the width direction of the support plate 1, that is, there is a through hole 11 between adjacent mounting grooves 12.

[0054] The support plate 1 is also provided with a plurality of water-passing spaces 13, and the plurality of water-passing spaces 13 correspond one to one with the plurality of mounting grooves 12; the positions of the water-passing spaces 13 on the support plate 1 are aligned with the perforations 11 along the width direction of the support plate 1, and are aligned with the corresponding mounting grooves 12 along the thickness direction of the support plate 1. In this embodiment, it is preferred that the support plate 1 has a total of four water-passing spaces 13 inside, and the positions of the four water-passing spaces 13 and the three perforations 11 on the support plate 1 are staggered along the width direction of the support plate 1, that is, there is a perforation 11 between adjacent water-passing spaces 13.

[0055] The support plate 1 also has a plurality of first seepage holes 14 and a plurality of second seepage holes 15 inside. The first seepage holes 14 are located between the mounting groove 12 and the corresponding water-passing space 13, and can separate water from the mounting groove 12 and the corresponding water-passing space 13; the second seepage holes 15 are located between the water-passing space 13 and the adjacent perforations 11, and can separate water from the water-passing space 13 and the adjacent perforations 11. In this embodiment, it is preferred that the aperture sizes of the first seepage holes 14 and the second seepage holes 15 both meet the requirements of water supply and can intercept sediment particles.

[0056] The interior of the positioning rod 2 has a cavity 22, and the cavity 22 passes through the end of the positioning rod 2 away from the spike 21 to form an opening; a plurality of through holes 23 are also opened on both sides of the positioning rod 2 in the radial direction, one end of the through hole 23 is connected to the cavity 22 and the other end passes through the outer surface of the positioning rod 2.

[0057] A positioning block 24 is also extended outward on one side of the positioning rod 2, and the positioning block 24 is distributed at a position of the positioning rod 2 away from the spike 21, and a positioning groove 16 compatible with the positioning block 24 is also correspondingly opened on the hole wall on one side of the through hole 11 on the support plate 1; when the positioning rod 2 is inserted into the through hole 11 and the positioning block 24 is fully engaged with the positioning groove 16, at this time, the positioning rod 2 is restricted from continuing to move downward relative to the support plate 1, and the rotation around its own axis in the through hole 11 is restricted; and at this time, several through holes 23 are all located in the through hole 11, and the cavity 22 can communicate with the water-passing space 13 on both sides thereof through several through holes 23 on both sides thereof and multiple second seepage holes 15 on both sides thereof.

[0058] Reference Figure 4 and Figure 5 At this time, the moisture in the soil around the foundation pit 7 can enter the cavity 22 through the installation groove 12, the first seepage hole 14, the water space 13, the second seepage hole 15 and the through hole 23 in turn, and when the water in the cavity 22 reaches a certain amount, it will overflow to the space where the perforation 11 is located above the positioning rod 2; at the same time, the water levels in the three cavities 22 will be connected through a number of through holes 23, a plurality of second seepage holes 15 and four water spaces 13 to remain flush.

[0059] The water absorbing member 3 has the property of absorbing water, and can expand or contract according to the amount of water absorbed by itself; the water absorbing member 3 is installed at a position of the installation groove 12 close to the first water seepage hole 14, and except for the surface of the side of the water absorbing member 3 away from the first water seepage hole 14, the rest of the surface of the water absorbing member 3 is in contact with the groove wall of the installation groove 12. In this embodiment, the water absorbing member 3 is preferably a sponge, and the volume of the water absorbing member 3 will expand after the water absorbing member 3 absorbs water; and preferably, the water absorbing member 3 can completely fill the installation groove 12 when it expands to the limit state after absorbing water.

[0060] The movable part 4 is located in the installation groove 12 on the side of the water absorbing part 3 away from the first water seepage hole 14, and the movable part 4 can move in the installation groove 12 relative to the supporting plate 1 along the thickness direction of the supporting plate 1; during the movement of the movable part 4, the peripheral surface of the movable part 4 and the peripheral groove wall of the installation groove 12 are kept in contact with each other, and when the movable part 4 moves to the extreme position in the direction away from the water absorbing part 3, the movable part 4 remains partially located in the installation groove 12, and partially inserted into the soil around the foundation pit 7.

[0061] A plurality of filter holes 41 are provided on the movable part 4 along its moving direction. The filter holes 41 can allow water to flow and intercept mud and sand particles at the same time, and the water entering the installation groove 12 through the filter holes 41 can be absorbed by the water absorbing part 3; one end of the water absorbing part 3 close to the movable part 4 is fixedly connected to the movable part 4, and the end of the water absorbing part 3 away from the movable part 4 is fixedly connected to the groove wall on the side of the installation groove 12 away from its own opening.

[0062] During the installation and construction of the support plate 1 in the foundation pit 7, the water-absorbing member 3 is in a state of not absorbing water and expanding, that is, in a state of shrinking to the limit. At this time, the movable member 4 is completely located in the installation groove 12, so that the support plate 1 and the inner wall of the foundation pit 7 are in contact with each other; after the support plate 1 has a supporting effect on the foundation pit 7 for a period of time, the moisture in the soil close to the support plate 1 will enter the installation groove 12 through the filter hole 41 and be absorbed by the water-absorbing member 3. At the same time, the water-absorbing member 3 expands after absorbing moisture, driving the movable member 4 to move to the limit position in the direction away from the first seepage hole 14; at this time, the movable member 4 will be partially inserted into the soil around the foundation pit 7, improving the support plate 1 and the foundation pit 7. The relative position stability between the inner walls; and at this time, while the water absorbing member 3 continues to absorb water, due to its limited expansion in the installation groove 12, the absorbed water will be squeezed out and enter the water space 13 through the first seepage hole 14, and the water in the water space 13 will enter the cavity 22 through the second seepage hole 15 and the through hole 23, and the gravity of the water in the cavity 22 can exert a downward force on the positioning rod 2, thereby improving the position stability of the support plate 1 in the foundation pit 7, and at the same time improving the position stability of the positioning rod 2 relative to the support plate 1, and reducing the probability of the positioning rod 2 moving upward and loosening relative to the support plate 1 due to geological movement.

[0063] When the movable part 4 is partially inserted into the soil around the foundation pit 7, if geological movement occurs, the geological movement will drive the movable part 4 to move in the direction close to the first seepage hole 14, thereby squeezing the swollen water absorbing part 3, causing the water absorbing part 3 to squeeze out the water and enter the water space 13 through the first seepage hole 14, so that the water absorbing part 3 can maintain a high water absorption effect for a long time.

[0064] Reference Figure 3 and Figure 4 , multiple covers 5 correspond to multiple perforations 11 one by one, and the covers 5 are detachably connected to the support plate 1. After the covers 5 are connected to the support plate 1, they can cover the opening of the end of the perforation 11 away from the bottom of the foundation pit 7. At this time, there is still a gap between the covers 5 and the hole wall of the perforation 11, which is convenient for the water absorbed by the subsequent water absorbent 3 to enter the cavity 22 and the perforation 11; at this time, the covers 5 can effectively prevent external impurities from entering the perforation 11, thereby reducing the probability of impurities entering the perforation 11 and clogging the through hole 23 and the second water seepage hole 15, and at the same time, it can reduce the smoothness of the positioning rod 2 relative to the support plate 1 after the impurities enter. In this embodiment, it is preferred that the cover 5 is detachably connected to the support plate 1 by multiple bolts; since the above-mentioned detachable connection method is a common prior art, it will not be described in detail here, and multiple bolts and related structures are omitted in the drawings.

[0065] Reference Figure 3 and Figure 6, multiple pressing components 6 correspond to multiple covering covers 5 one by one, and the pressing components 6 are installed on the covering covers 5 . When the covering covers 5 are installed on the supporting plate 1 , the pressing components 6 will be located inside the supporting plate 1 .

[0066] The pressing assembly 6 includes a frame 61, abutment 62, a driving member 63, a linkage member 64 and a floating member 65. The frame 61 is used as a mounting carrier for other components of the pressing assembly 6; the abutment 62 is used to abut against the positioning rod 2, and has a positioning effect on the position of the positioning rod 2 relative to the supporting plate 1; the floating member 65 can float on the water and can be affected by the buoyancy of the water in the water; the driving member 63 and the linkage member 64 cooperate to transfer the buoyancy of the floating member 65 to the abutment 62.

[0067] The frame 61 is fixedly installed on one side of the cover 5, the linkage member 64 is a disc structure as a whole, and the edge of the linkage member 64 has a gear structure; the linkage member 64 is rotatably connected to the frame 61, and the rotation axis of the linkage member 64 coincides with its own axis; after the cover 5 is installed on the support plate 1, the rotation axis of the linkage member 64 is parallel to the width direction of the support plate 1.

[0068] The abutment 62 is a rod-shaped structure as a whole, and one end of the abutment 62 in the length direction is movably connected to the frame body 61, and can move a certain stroke relative to the frame body 61, and maintain a connection relationship with the frame body 61 during the movement; the side of the abutment 62 close to the linkage member 64 has a rack structure at its end close to the linkage member 64, and its rack structure is distributed along its length direction, and during the movement of the abutment 62 relative to the frame body 61, its rack structure remains engaged with the gear structure of the linkage member 64; after the cover 5 is installed on the support plate 1, the abutment 62 will be located on the side of the positioning rod 2 close to the cover 5 and the end of the abutment 62 away from the frame body 61 will contact and abut against the positioning block 24 of the positioning rod 2, and at the same time it is located in the positioning groove 16 and slides with the positioning groove 16.

[0069] The driving member 63 is a rod-shaped structure as a whole, and one end of the driving member 63 in the length direction is movably connected to the frame 61, and is located on the side of the linkage member 64 away from the abutment 62. It can move a certain stroke relative to the frame 61, and maintain a connection relationship with the frame 61 during the movement; the side of the driving member 63 close to the linkage member 64 has a rack structure at its end close to the linkage member 64, and its rack structure is distributed along its length direction, and during the movement of the driving member 63 relative to the frame 61, its rack structure remains engaged with the gear structure of the linkage member 64; after the cover 5 is installed on the support plate 1, the end of the abutment 62 away from the frame 61 will pass through the through hole 11 and enter the cavity 22 of the positioning rod 2.

[0070] The floating member 65 is fixedly mounted on one end of the driving member 63 away from the frame 61 . After the cover 5 is mounted on the supporting plate 1 , the floating member 65 will be located in the cavity 22 of the positioning rod 2 , and at this time, a distance is maintained between the floating member 65 and the inner wall of the cavity 22 .

[0071] At this time, when the amount of moisture entering the cavity 22 reaches a certain amount, that is, when the floating member 65 contacts the moisture in the cavity 22, the floating member 65 will be subjected to the buoyancy of the water, which will make the driving member 63 tend to move upward, and the driving member 63 can make the abutment 62 have a tendency to move downward synchronously through the linkage member 64, so that the abutment 62 contacts and abuts against the positioning block 24 of the positioning rod 2 to apply a force, thereby further improving the position stability of the positioning rod 2 relative to the support plate 1; at the same time, as the amount of moisture stored in the cavity 22 increases, the buoyancy of the floating member 65 will also increase, thereby increasing the force applied by the abutment 62 to the positioning rod 2, thereby enhancing the positioning effect of the pressing assembly 6 on the position state of the positioning rod 2 relative to the support plate 1.

[0072] Reference Figure 1 and Figure 2 In actual applications, the foundation pit 7 will be spliced ​​by multiple of the above-mentioned foundation pit support structures to form a wall structure surrounding the edge of the foundation pit 7 and fitting the inner wall of the side of the foundation pit 7 to support the foundation pit 7 as a whole. Since the above-mentioned operation is the existing technology in this field, the splicing method will not be described here, and the spliced ​​wall structure is omitted in the accompanying drawings.

[0073] The implementation principle of a foundation pit support structure in the embodiment of the present application is:

[0074] In the process of supporting the foundation pit 7, the moisture in the soil near the foundation pit 7 can be timely and effectively absorbed by the water absorbing member 3 through the filter holes 41 on the movable member 4. After the water absorbing member 3 absorbs and expands, it can drive the movable member 4 to move outward and partially insert into the soil to improve the position stability of the supporting plate 1 in the foundation pit 7; then the water absorbing member 3 continues to absorb the moisture in the soil, and can squeeze out the excess moisture under the condition of limited volume. The moisture enters the water passing space 13 through the first seepage hole 14, and then enters the cavity 22 of the positioning rod 2 through the second seepage hole 15 and the through hole 23 for storage; at this time, the weight of the water in the cavity 22 is The force action can apply a downward force to the positioning rod 2, effectively improving the position stability of the positioning rod 2 relative to the support plate 1; then, as the moisture in the cavity 22 increases, the floating member 65 comes into contact with water or is immersed in water, and the floating member 65, under the action of the buoyancy, will drive the driving member 63 to have an upward movement tendency, thereby making the abutment 62 have a downward movement tendency through the linkage member 64, so that the abutment 62 applies a downward force to the positioning block 24 of the positioning rod 2, further improving the position stability of the positioning rod 2 relative to the support plate 1, so that the support plate 1 can stably and effectively support the foundation pit 7 in the foundation pit 7.

[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A foundation pit support structure, characterized in that: It comprises a supporting plate (1), a plurality of water absorbing members (3) and a plurality of positioning rods (2); A plurality of installation grooves (12) are provided on one side of the support plate (1), the installation grooves (12) penetrate the end surface of the support plate (1) to form an opening, and the plurality of water absorbing members (3) are respectively arranged in the plurality of installation grooves (12); The support plate (1) is provided with a plurality of through holes (11) for inserting the positioning rod (2), one end of the positioning rod (2) has a spike (21), and after the spike (21) penetrates the soil at the bottom of the foundation pit (7), the peripheral side surface of the portion of the positioning rod (2) located in the through hole (11) fits against the hole wall of the through hole (11), thereby sealing the opening at the bottom of the through hole (11); The support plate (1) is further provided with a plurality of water-passing spaces (13), a plurality of first water seepage holes (14), and a plurality of second water seepage holes (15); the water-passing spaces (13) are in communication with the mounting grooves (12) through the plurality of first water seepage holes (14), and the water-passing spaces (13) are in communication with the through holes (11) through the plurality of second water seepage holes (15); The positioning rod (2) has a cavity (22) inside, and a plurality of through holes (23) are formed on the peripheral surface of the positioning rod (2); after the spike (21) penetrates the soil at the bottom of the foundation pit (7), the end of the cavity (22) away from the spike (21) communicates with the through hole (11), and the cavity (22) can communicate with a plurality of adjacent second water seepage holes (15) through the plurality of through holes (23); A positioning block (24) is extended outwardly along the radial direction of one side of the positioning rod (2), and a positioning groove (16) matching the positioning block (24) is formed on the wall of the through hole (11) of the support plate (1); After the spike (21) penetrates the soil at the bottom of the foundation pit (7) and the positioning block (24) is engaged with the positioning groove (16), the plurality of through holes (23) are used to connect the cavity (22) with the adjacent plurality of second water seepage holes (15); The plurality of water-passing spaces (13) can communicate with each other through the plurality of the second water seepage holes (15), the plurality of the through holes (23) and the plurality of the cavities (22); It also comprises a plurality of sealing covers (5) and a plurality of pressing assemblies (6), and the plurality of pressing assemblies (6) and the plurality of sealing covers (5) correspond one to one; The cover (5) is detachably connected to the support plate (1), and a plurality of the cover (5) corresponds to a plurality of the through holes (11) one by one; after the cover (5) is connected to the support plate (1), the cover (5) covers the opening at the top of the corresponding through hole (11); The pressing assembly (6) comprises a frame (61) and a contact piece (62); the frame (61) is arranged on the cover (5), and the contact piece (62) is arranged on the frame (61); after the cover (5) is connected to the supporting plate (1), the frame (61) is located in the through hole (11), the contact piece (62) is located in the positioning groove (16), and one end of the contact piece (62) away from the frame (61) contacts and abuts against the top of the positioning block (24) of the positioning rod (2).

2. A foundation pit support structure according to claim 1, characterized in that: The pressing assembly (6) further comprises a driving member (63), a linkage member (64) and a floating member (65); The abutment member (62) is slidably connected to the positioning rod (2), and the sliding direction of the abutment member (62) is the same as the extension direction of the positioning groove (16); the linkage member (64) is rotationally connected to the frame (61), and the rotation axis of the linkage member (64) is perpendicular to the sliding direction of the abutment member (62); the driving member (63) is slidably connected to the frame (61), and the sliding direction of the driving member (63) is parallel to the sliding direction of the abutment member (62); the abutment member (62) and the driving member (63) are both provided with a rack structure, the linkage member (64) is provided with a gear structure meshing with the rack structure, and the abutment member (62) and the driving member (63) slide synchronously in opposite directions through the linkage member (64); The floating member (65) is arranged at an end of the driving member (63) away from the frame (61) and is located in the cavity (22).

3. A foundation pit support structure according to claim 1, characterized in that: It also includes a plurality of movable parts (4), and the plurality of movable parts (4) correspond one-to-one to the plurality of mounting slots (12); The movable member (4) is located on a side of the water absorbing member (3) away from the supporting plate (1), and the movable member (4) is penetrated by a plurality of filtering holes (41) for allowing water to enter the mounting groove (12); the movable member (4) is movably matched with the mounting groove (12), and when the movable member (4) moves in a direction away from the water absorbing member (3) to an extreme position, the movable member (4) is still connected to the supporting plate (1).

4. A foundation pit support structure according to claim 3, characterized in that: The water absorbing member (3) can fill the installation groove (12) after absorbing water.

5. A foundation pit support structure according to claim 4, characterized in that: The movable part (4) is connected to the water absorbing part (3), and the movable part (4) moves with the expansion and contraction of the water absorbing part (3).

6. A foundation pit support structure according to claim 5, characterized in that: When the movable member (4) moves to an extreme position in a direction away from the water absorbing member (3), a portion of the movable member (4) is located outside the installation groove (12).

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