Supporting structure in foundation pit

Abstract

The invention relates to the technical field of foundation pit supporting mechanisms, and provides a supporting structure in a foundation pit. The supporting plates are embedded in the ground and attached to the inner circumferential side of the foundation pit, and the bottom plate is used for being connected with the supporting plates so as to be attached to the inner bottom wall of the foundation pit. The partition plates are arranged at the upper ends of the supporting plates and extend to the outer side of the foundation pit, the supporting rods are arranged in the foundation pit and used for abutting against the supporting plates, and the pushing mechanism is used for pushing the supporting rods to move in the direction close to the supporting plates. A water collecting tank is arranged on the outer side of the foundation pit, a plurality of liquid outlet holes are formed in the supporting plate, liquid outlet pipes communicated with the liquid outlet holes are arranged on the supporting plate, the liquid outlet pipes extend into the water collecting tank, a water suction pump used for sucking water in the water collecting tank is arranged on the outer side of the foundation pit, and the partition plate is used for covering a notch of the water collecting tank. The end, away from the supporting plate, of the partition plate is obliquely arranged downwards. The supporting structure has the beneficial effect that the stability of the supporting structure in the foundation pit during use is improved.

Description

Technical Field

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

[0002] The foundation pit is a pit dug at the design location of the foundation according to the base elevation and the plane size of the foundation. Before excavation, the excavation plan should be determined based on the geological and hydrological data and the situation of nearby buildings on site, and waterproofing and drainage should be done. If the excavation is not deep, the slope can be used to stabilize the slope, and the slope size is determined according to the relevant construction project regulations. For deep excavations and nearby buildings, the foundation pit wall support method and shotcrete wall protection method can be used. Large foundation pits can even use underground continuous walls and column-type bored pile interlocking methods to prevent the outer soil layer from collapsing; if there is no impact on nearby buildings, the well point method can be used to lower the groundwater level and use slope open excavation; in cold areas, natural cold air freezing method can be used for excavation, etc.

[0003] When the existing support structure in the foundation pit is in use, in rainy weather, rainwater will enter the soil on the side of the foundation pit, which is prone to collapse, increasing the safety hazard to the stability of the support structure. For this reason, we propose a support structure in the foundation pit. Summary of the invention

[0004] In order to improve the stability of the support structure in a foundation pit when in use, the present application provides a support structure in a foundation pit.

[0005] The present application provides a foundation pit support structure, which adopts the following technical solution: A support structure in a foundation pit, comprising a plurality of support plates embedded in the ground and fitted to the inner circumference of the foundation pit, a bottom plate used to connect the plurality of support plates to fit the bottom wall of the foundation pit, a plurality of partitions arranged at the upper ends of the support plates to extend to the outside of the foundation pit, and a support rod arranged in the foundation pit to abut against the support plates, and a pushing mechanism used to push the support rod to move in a direction close to the support plates; a water collecting trough is arranged outside the foundation pit, a plurality of liquid outlet holes are opened on the support plates, a liquid outlet pipe connected to the liquid outlet holes is arranged on the support plates, the liquid outlet pipe extends into the water collecting trough, a water pump for extracting water in the water collecting trough is arranged outside the pit, and the partitions are used to push the support rods to move in a direction close to the support plates; The plate is used to cover the notch of the water collecting trough, and the partition is arranged at an end away from the support plate and is inclined downward; the pushing mechanism includes a support rod arranged on the bottom plate, a water receiving trough slidably sleeved on the support rod for receiving rainwater, a first elastic member arranged on the support rod for pushing the water receiving trough to move toward the upper end surface of the support rod, a first connecting rod hinged to the lower surface of the water receiving trough, and a second connecting rod hinged to the first connecting rod, the support rod is arranged at the end of the first connecting rod away from the water receiving trough, the end of the first connecting rod away from the water receiving trough is inclined downward, and the end of the second connecting rod away from the first connecting rod is hinged to the support rod.

[0006] By adopting the above technical solution, when it rains, rainwater falls into the chamber formed between several support plates and the bottom plate, and when it reaches the height position of the liquid outlet, it is discharged into the sump along the liquid outlet pipe, and is pumped to other places by the water pump to reduce the amount of water in the sump. However, when water falls onto the support plates and the ground outside the foundation pit, the land may be partially carried away by the water. Therefore, a partition is provided, and the partition is extended to the groove of the sump to block it, so as to reduce the possibility of water falling directly into the sump, and the partition is arranged to be inclined downward in the direction away from the foundation pit to reduce the water flowing back into the foundation pit along the partition. As the amount of water increases, when the amount of water in the corresponding chamber and the sump is too large, the force of the water in the sump may push back onto the support plate, affecting subsequent use. Therefore, a support rod and a pushing mechanism are provided for support. The push of the support rod is mainly through rainwater. As the rainwater falls into the sump and the weight of the rainwater increases, the sump is driven to slide downward, thereby driving the first connecting rod to approach the second connecting rod, driving the support rod to lift, move toward the direction close to the support plate and abut against it for support, so as to improve the stability of the support structure in the foundation pit when in use.

[0007] Preferably, the support rod is located below the liquid outlet when it abuts against the support plate, a notch is provided at the edge of the water receiving groove, a flow groove connected to the notch is provided on the upper surface of the first connecting rod, and the flow groove extends to the upper surface of the support rod and is connected to the liquid outlet.

[0008] By adopting the above technical solution, as rain falls, the water receiving capacity of the water receiving trough is limited and overflow will occur. Therefore, a gap and a flow groove are provided to allow excess water to flow along the inclined direction of the first connecting rod through the liquid outlet hole and the liquid outlet pipe into the water collecting trough.

[0009] Preferably, the pushing mechanism is also provided with a foldable shielding assembly, which is unfolded as the support rod moves toward the support plate. The shielding assembly is arranged in an umbrella shape in the unfolded state to shield the top of the cavity formed between the several support plates and the bottom plate.

[0010] By adopting the above technical solution, when it rains, the rain will pass through the space between adjacent support poles and fall below, causing the support plate and the bottom plate to be immersed in water for a long time. Therefore, a shielding component is provided to shield the rainwater. Since the shielding component is arranged in an umbrella shape after being unfolded, the rainwater moves toward the direction close to the support plate to be concentrated between the shielding component and the support plate, and then discharged through the liquid outlet.

[0011] Preferably, the unfolded edge of the shielding assembly extends to the upper end of the support plate.

[0012] By adopting the above technical solution, the edge of the unfolded shielding assembly is extended to the upper end of the support plate, so that water can fall along the umbrella-shaped unfolded shielding assembly to the outside of the foundation pit, thereby reducing the possibility of excessive rainwater accumulating behind the support plate and the shielding assembly and collapsing the shielding frame.

[0013] Preferably, the shielding assembly includes a shielding cloth, a plurality of third connecting rods for supporting the shielding cloth, and a fourth connecting rod hinged to the third connecting rods, a waterproof layer is provided on the upper surface of the shielding cloth, one end of the shielding cloth away from the support plate is connected to the edge of the water receiving trough at the notch, and one end of the fourth connecting rod away from the third connecting rod is hinged to the first connecting rod.

[0014] By adopting the above technical solution, the shielding cloth is flexible enough to be folded, and a waterproof layer is provided on the upper surface for waterproofing. When the support rod moves toward the support plate, the fourth connecting rod drives the third connecting rod to rise, and then the shielding cloth is unfolded to shield the cavity opening formed between the several support plates and the bottom plate, so as to reduce the possibility of water falling into the cavity.

[0015] Preferably, the notch extends to the inner bottom wall of the water receiving trough, and an adjusting component for adjusting the size of the notch is provided in the water receiving trough.

[0016] By adopting the above technical solution, since the water receiving trough is slidably sleeved on the support rod, it is inconvenient to pour out the water in the water receiving trough. Therefore, an adjustment component is provided to adjust the size of the gap so that adjustment can be made after the rain stops.

[0017] Preferably, a second slide groove is provided on the upper end surface of the support rod, and the adjustment assembly includes a sliding plate slidably connected to the second slide groove, a fixed rod fixedly connected to the sliding plate, an adjustment plate fixedly connected to the fixed rod, and a second elastic member built into the second slide groove to push the sliding plate to slide toward the groove opening of the second slide groove, and a flow port connected to the water receiving trough is provided on the inner wall of the second slide groove, and a receiving groove for receiving rainwater is reserved between the upper surface of the sliding plate and the upper end surface of the support rod, the sliding plate is provided with a water flow trough connected to the flow port, and the water flow trough extends to the outer peripheral wall of the sliding plate, the fixed rod is arranged in an inverted U shape, and the adjustment plate is slidably connected to the inner side wall of the water receiving trough.

[0018] By adopting the above technical scheme, since the sliding plate is slidably connected to the second sliding groove, and a receiving groove for receiving rainwater is reserved between the sliding plate and the upper end surface of the support rod, as the rainwater increases, the weight of the rainwater compresses the second elastic member, so that the sliding plate descends, thereby driving the adjusting plate to descend so that the amount of water that can flow through the gap at this time gradually increases; when the receiving groove is full of rainwater, and the amount of rainwater entering the receiving groove is greater than the flow rate of rainwater flowing from the flow port to the water receiving groove, at this time, the height of the gap is located at the highest position of the water receiving groove, so that the amount of rainwater that can be received in the water receiving groove is the largest, and the elasticity of the first elastic member itself is taken into account to descend, so as to drive the support rod to move toward the direction of the support plate for support, and drive the shielding assembly to unfold, thereby reducing the possibility of rainwater falling into the cavity.

[0019] Preferably, a plurality of liquid outlet holes are spaced apart along the length direction of the support plate, a filter screen is provided at the liquid outlet hole of the support plate, a cleaning rod for cleaning the filter screen is provided on the support rod, and the length direction of the cleaning rod is parallel to the length direction of the support plate.

[0020] By adopting the above technical solution, during use, rainwater falling into the chamber formed between the several support plates and the bottom plate will carry impurities in the chamber and may enter the water collecting trough through the liquid outlet to affect the subsequent drainage effect. Therefore, a filter net is provided to filter the impurities. However, with practical use, the filtered impurities may affect the subsequent water circulation. Therefore, a cleaning rod is provided on the support rod. When the support rod moves toward the support plate, the cleaning rod is driven to clean the impurities on the filter net. When it rains, the water collecting trough is filled to clean the impurities on the filter net.

[0021] Preferably, the plurality of liquid outlet holes include a first liquid outlet hole arranged at the bottom of the support plate and a second liquid outlet hole arranged at the middle of the support plate, and the support rod is arranged close to the second liquid outlet hole.

[0022] By adopting the above technical solution, the liquid located on the bottom plate is discharged into the water collecting tank through the first liquid outlet hole.

[0023] In summary, this application has the following beneficial effects: By providing a partition and extending the partition to the notch of the water collection tank for shielding, the possibility of water falling directly into the water collection tank is reduced, and the partition is arranged downwardly and tilted away from the foundation pit to reduce the water flowing back into the foundation pit along the partition. And by providing a support rod and a pushing mechanism for support, the push of the support rod is mainly through rainwater. As the rainwater falls into the water collection tank, as the weight of the rainwater increases, the water collection tank slides downward, and then the first connecting rod is driven to approach the direction of the second connecting rod, so as to drive the support rod to lift, move in the direction close to the support plate and abut against it, so as to improve the stability of the support structure in the foundation pit when it is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic cross-sectional structure diagram of an embodiment of the present application; Figure 3 is a schematic cross-sectional structure diagram of a pushing mechanism in an embodiment of the present application; Figure 4 is a schematic diagram of the structure of the adjustment component in the embodiment of the present application; Figure 5 It is a schematic diagram of the structure of the filter screen in the embodiment of the present application.

[0025] Explanation of reference numerals: 1, foundation pit; 11, water collection tank; 12, water pump; 13, water pump; 14, water collection tank; 2, support plate; 21, liquid outlet; 211, first liquid outlet; 212, second liquid outlet; 22, liquid outlet pipe; 23, filter screen; 3, bottom plate; 4, partition; 41, filter hole; 5, support rod; 51, cleaning rod; 6, pushing mechanism; 61, support rod; 611, first chute; 612 , second slide groove; 613, flow port; 62, water receiving groove; 621, slider; 622, notch; 63, first elastic member; 64, first connecting rod; 641, flow groove; 65, second connecting rod; 66, shielding assembly; 661, shielding cloth; 662, third connecting rod; 663, fourth connecting rod; 7, adjustment assembly; 71, sliding plate; 72, fixing rod; 73, adjustment plate; 74, second elastic member. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-5 , further details of this application are given.

[0027] An embodiment of the present application discloses a support structure in a foundation pit.

[0028] Example: A support structure in a foundation pit 1, referring to Figure 1 , Figure 2 It includes a plurality of support plates 2 embedded in the ground and attached to the inner circumference of the foundation pit 1, a bottom plate 3 used to connect the plurality of support plates 2 to be attached to the inner bottom wall of the foundation pit 1, a plurality of partitions 4 arranged at the upper ends of the support plates 2 to extend to the outside of the foundation pit 1, a support rod 5 arranged in the foundation pit 1 to abut against the support plate 2, and a pushing mechanism 6 used to push the support rod 5 to move toward the direction close to the support plate 2.

[0029] In this embodiment, four support plates 2 are specifically provided, and one bottom plate 3 is provided to form a support box with a chamber, which is provided in the foundation pit 1 for display. A water collecting trough 11 is provided outside the foundation pit 1, and the water collecting trough 11 is provided in a ring shape outside the base. The support plate 2 is provided with a plurality of liquid outlets 21. In this embodiment, the plurality of liquid outlets 21 are provided at intervals along the length direction of the support plate 2. The support plate 2 is fixedly provided with a liquid outlet pipe 22 connected to the liquid outlet hole 21, and the liquid outlet pipe 22 extends into the water collecting trough 11. The plurality of liquid outlets 21 include a first liquid outlet 211 provided at the bottom of the support plate 2 and a second liquid outlet 212 provided in the middle of the support plate 2. A pumping pipe 12 is provided in the water collecting tank 11. The pumping pipe 12 passes through the partition 4 and extends to the outside of the foundation pit 1. A pumping pump 13 for extracting water from the water collecting tank 11 is provided on the outside of the foundation pit 1. The water inlet end of the pumping pump 13 is connected to the water outlet end of the pumping pipe 12. A water collecting tank 14 connected to the water outlet end of the pumping pump 13 is provided on the outside of the foundation pit 1 to collect rainwater for use, thereby achieving energy-saving effect.

[0030] In this embodiment, the partition 4 is used to cover the notch of the water collection tank 11, and the end of the partition 4 away from the support plate 2 is inclined downward to make the water flow away from the support plate 2, reducing the possibility of backflow into the chamber. It should be noted that a plurality of filter holes 41 can be opened through the upper surface of the partition 4 to filter the impurities retained on the partition 4 along with the rainwater outside the foundation pit 1, so that the rainwater falls into the water collection tank 11 for collection.

[0031] Reference Figure 2 , Figure 3In this embodiment, the support rod 5 is arranged near the second liquid outlet 212 and is arranged below the second liquid outlet 212. For the support of the support plate 2 by the support rod 5, specifically, the pushing mechanism 6 includes a support rod 61 for being arranged on the bottom plate 3, a water receiving trough 62 slidably sleeved on the support rod 61 for receiving rainwater, a first elastic member 63 arranged on the support rod 61 for pushing the water receiving trough 62 to move toward the upper end surface of the support rod 61, a first connecting rod 64 hinged to the lower surface of the water receiving trough 62, a second connecting rod 65 hinged to the first connecting rod 64, and a shielding assembly 66 for shielding the chamber. In this embodiment, the support rod 61 is detachably connected to the bottom plate 3, and can be disassembled by a threaded connection between the support rod 61 and the bottom plate 3, or by other methods, which is specifically set according to needs.

[0032] Reference Figure 3 , Figure 4 , wherein the support rod 61 is provided with one, and the support rod 61 is arranged in the middle of the bottom plate 3, the outer peripheral wall of the support rod 61 is provided with a first slide groove 611, the length direction of the first slide groove 611 is parallel to the length direction of the support rod 61, and the inner wall of the water receiving groove 62 is protrudingly provided with a slider 621 slidably connected to the first slide groove 611. In this embodiment, the first elastic member 63 is a first spring, the first spring is built into the first slide groove 611, and the two ends of the first spring are respectively fixedly connected to the lower surface of the slider 621 and the inner bottom wall of the first slide groove 611. The first spring forces the water receiving groove 62 to slide toward the upper end close to the support rod 61.

[0033] In this embodiment, the cross-section of the water receiving trough 62 is U-shaped for receiving rainwater. A notch 622 is provided on the outer wall of the water receiving trough 62. The notch 622 extends to the upper end surface and the inner bottom wall of the water receiving trough 62. There are four notches 622, which are respectively arranged close to the four support plates 2.

[0034] In this embodiment, an adjustment component 7 for adjusting the height of the notch 622 is provided in the water receiving groove 62. A second slide groove 612 is provided on the upper end surface of the support rod 61, and the adjustment component 7 specifically includes a sliding plate 71 slidably connected to the second slide groove 612, a fixed rod 72 fixedly connected to the sliding plate 71, an adjustment plate 73 fixedly connected to the fixed rod 72, and a second elastic member 74 built into the second slide groove 612 to push the sliding plate 71 to slide toward the notch of the second slide groove 612. Among them, a flow port 613 connected to the water receiving groove 62 is provided on the inner wall of the second slide groove 612, and a receiving groove for accommodating rainwater is reserved between the upper surface of the sliding plate 71 and the upper end surface of the support rod 61, so that excess water flows into the water receiving groove 62. It should be noted that the flow rate at the opening of the receiving groove is greater than the flow rate of the circulation port 613, so that when the amount of rainwater is reduced, the support rod 5 can still provide certain support to the support plate 2, and the shielding component 66 can provide a shielding effect on the top of the chamber.

[0035] In this embodiment, the fixing rod 72 is arranged in an inverted U shape, and the adjusting plate 73 is slidably connected to the inner side wall of the water receiving groove 62, and can be directly slidably connected to the notch 622 to open and close the notch 622, thereby adjusting the flow rate of the notch 622. In this embodiment, the second elastic member 74 is a second spring, and the second spring is built into the second slide groove 612. The two ends of the second spring are respectively fixedly connected to the lower surface of the sliding plate 71 and the inner bottom wall of the second slide groove 612, and the second spring forces the sliding plate 71 to move toward the upper end surface of the support rod 61.

[0036] The support rod 5 is arranged at the end of the first connecting rod 64 away from the water receiving groove 62, and one end of the first connecting rod 64 away from the water receiving groove 62 is arranged downwardly at an angle, and the end of the second connecting rod 65 away from the first connecting rod 64 is hinged to the support rod 61. The upper surface of the first connecting rod 64 is provided with a flow groove 641 connected to the notch 622, and the flow groove 641 extends to the upper surface of the support rod 5 and is connected to the liquid outlet 21, so as to flow the water from the notch 622 to the liquid outlet 21 for discharge, thereby reducing the possibility of rainwater being retained in the support box.

[0037] Reference Figure 3 , Figure 5 Furthermore, in order to reduce the possibility of impurities in the support box flowing to the filter hole 41 with rainwater, in the present embodiment, a filter screen 23 is provided at the liquid outlet 21 of the support plate 2. As the mesh of the filter screen 23 is likely to be clogged by impurities during use, thereby affecting the subsequent drainage effect, in the present embodiment, a cleaning rod 51 for cleaning the filter screen 23 is provided on the support rod 5. The cleaning rod 51 is provided in an inverted U shape, with both ends of the cleaning rod 51 fixedly connected to the support rod 5. The length direction of the cleaning rod 51 is parallel to the length direction of the support plate 2. The cleaning rod 51 may be provided with a scraper made of silicone or a brush strip made of bristles to improve the cleaning effect of the filter screen 23.

[0038] In this embodiment, the shielding assembly 66 is unfolded as the support rod 5 moves toward the support plate 2. In the unfolded state, the shielding assembly 66 is arranged in an umbrella shape to shield the top of the cavity formed between the plurality of support plates 2 and the base plate 3, and the unfolded edge of the shielding assembly 66 extends to the upper end of the support plate 2.

[0039] Specifically, the shielding assembly 66 includes a shielding cloth 661, a plurality of third connecting rods 662 for supporting the shielding cloth 661, and a fourth connecting rod 663 hinged to the third connecting rod 662. In this embodiment, a waterproof layer is provided on the upper surface of the shielding cloth 661, and one end of the shielding cloth 661 away from the support plate 2 is connected to the edge of the water receiving trough 62 located at the notch to reduce the possibility of water flowing from the gap between the shielding portion and the water receiving trough 62 into the chamber below, so as to reduce the content of rainwater in the support box, wherein the third connecting rod 662 is fixedly connected to the lower surface of the shielding cloth 661, and one end of the fourth connecting rod 663 away from the third connecting rod 662 is hinged to the first connecting rod 64.

[0040] The implementation principle of the support structure in a foundation pit 1 of an embodiment of the present application is as follows: when it rains, rainwater falls into the chamber, and when it reaches the height position of the liquid outlet 21, it is discharged into the sump 11 along the liquid outlet pipe 22, and is pumped to other places by the water pump 13 to reduce the amount of water in the sump 11. However, when water falls onto the support plate 2 and the ground outside the foundation pit 1, the land may be partially carried away by the water. Therefore, a partition 4 is provided, and the partition 4 is extended to the notch of the sump 11 for shielding, thereby reducing the possibility of water falling directly into the sump 11, and the partition 4 is arranged to be inclined downward in the direction away from the foundation pit 1, thereby reducing the water from flowing back into the foundation pit 1 along the partition 4.

[0041] As the amount of water increases, the amount of rain falling into the accommodating cavity and the water receiving trough 62 increases. First, the adjusting plate 73 is driven to move toward the bottom inner wall of the water receiving trough 62 to gradually reduce the flow of the notch 622, so that the water receiving trough 62 is lowered by the weight of the rainwater, and then the first connecting rod 64 is driven to approach the second connecting rod 65, so as to drive the support rod 5 to be lifted, moved toward the direction close to the support plate 2 and abutted to provide support, so as to improve the stability of the support structure in the foundation pit 1 when in use.

[0042] And as the support rod 5 abuts, it drives the fourth connecting rod 663 to push the third connecting rod 662 to rise, and then unfolds the shielding cloth 661 to shield the cavity opening formed between the several support plates 2 and the bottom plate 3 to reduce the possibility of water falling into the cavity.

[0043] 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 supporting structure in a foundation pit, characterized in that: The invention comprises a plurality of support plates (2) embedded in the ground and attached to the inner circumference of a foundation pit (1), a bottom plate (3) used to connect the plurality of support plates (2) so as to be attached to the inner bottom wall of the foundation pit (1), a plurality of partition plates (4) arranged at the upper ends of the support plates (2) and extending to the outside of the foundation pit (1), a support rod (5) arranged in the foundation pit (1) and used to abut against the support plate (2), and a pushing mechanism (6) used to push the support rod (5) to move in a direction close to the support plate (2); a water collecting trough (11) is arranged outside the foundation pit (1), a plurality of liquid outlet holes (21) are opened on the support plate (2), a liquid outlet pipe (22) connected to the liquid outlet holes (21) is arranged on the support plate (2), and the liquid outlet pipe (22) extends into the water collecting trough (11), a water pump (13) for extracting water from the water collecting trough (11) is arranged outside the pit, and the partition plate (4) is used to cover the water collecting trough (11) provided on the foundation pit (1). The notch of the water collecting trough (11), the end of the partition (4) away from the support plate (2) is arranged obliquely downward; the pushing mechanism (6) comprises a support rod (61) for being arranged on the bottom plate (3), a water receiving trough (62) slidably sleeved on the support rod (61) for receiving rainwater, a first elastic member (63) arranged on the support rod (61) for pushing the water receiving trough (62) to move in the direction of the upper end surface of the support rod (61), a first connecting rod (64) hinged to the lower surface of the water receiving trough (62), and a second connecting rod (65) hinged to the first connecting rod (64), the support rod (5) is arranged at the end of the first connecting rod (64) away from the water receiving trough (62), the end of the first connecting rod (64) away from the water receiving trough (62) is arranged obliquely downward, and the end of the second connecting rod (65) away from the first connecting rod (64) is hinged to the support rod (61).

2. A support structure in a foundation pit according to claim 1, characterized in that: When the support rod (5) abuts against the support plate (2), it is located below the liquid outlet hole (21); a notch (622) is provided at the edge of the water receiving groove (62); a flow groove (641) connected to the notch (622) is provided on the upper surface of the first connecting rod (64); the flow groove (641) extends to the upper surface of the support rod (5) and is connected to the liquid outlet hole (21).

3. A support structure in a foundation pit according to claim 2, characterized in that: The pushing mechanism (6) is further provided with a foldable shielding component (66), which is unfolded as the support rod (5) moves in a direction close to the support plate (2). In the unfolded state, the shielding component (66) is arranged in an umbrella shape to shield the top of the chamber formed between the plurality of support plates (2) and the bottom plate (3).

4. A supporting structure in a foundation pit according to claim 3, characterized in that: The unfolded edge of the shielding assembly (66) extends to the upper end of the support plate (2).

5. A supporting structure in a foundation pit according to claim 4, characterized in that: The shielding assembly (66) comprises a shielding cloth (661), a plurality of third connecting rods (662) for supporting the shielding cloth (661), and a fourth connecting rod (663) hinged to the third connecting rod (662); a waterproof layer is provided on the upper surface of the shielding cloth (661); one end of the shielding cloth (661) away from the support plate (2) is connected to an edge of the water receiving trough (62) at a notch; and one end of the fourth connecting rod (663) away from the third connecting rod (662) is hinged to the first connecting rod (64).

6. The supporting structure in a foundation pit according to claim 4, characterized in that: The notch (622) extends to the inner bottom wall of the water receiving trough (62), and an adjustment component (7) for adjusting the size of the notch (622) is provided in the water receiving trough (62).

7. A supporting structure in a foundation pit according to claim 6, characterized in that: The upper end surface of the support rod (61) is provided with a second slide groove (612), the adjustment assembly (7) comprises a slide plate (71) slidably connected to the second slide groove (612), a fixed rod (72) fixedly connected to the slide plate (71), an adjustment plate (73) fixedly connected to the fixed rod (72), and a second elastic member (74) built into the second slide groove (612) to push the slide plate (71) to slide toward the notch of the second slide groove (612), the second slide groove ( The inner wall of the sliding plate (71) is provided with a flow opening (613) connected to the water receiving trough (62); a receiving groove for receiving rainwater is reserved between the upper surface of the sliding plate (71) and the upper end surface of the support rod (61); the sliding plate (71) is provided with a water flow trough connected to the flow opening (613); the water flow trough extends to the outer peripheral wall of the sliding plate (71); the fixing rod (72) is arranged in an inverted U shape; and the adjusting plate (73) is slidably connected to the inner side wall of the water receiving trough (62).

8. The supporting structure in a foundation pit according to claim 1, characterized in that: A plurality of liquid outlet holes (21) are arranged at intervals along the length direction of the support plate (2); a filter screen (23) is arranged on the support plate (2) at the liquid outlet hole (21); a cleaning rod (51) for cleaning the filter screen (23) is arranged on the support rod (5); and the length direction of the cleaning rod (51) is parallel to the length direction of the support plate (2).

9. A supporting structure in a foundation pit according to claim 8, characterized in that: The plurality of liquid outlet holes (21) include a first liquid outlet hole (211) arranged at the bottom of the support plate (2) and a second liquid outlet hole (212) arranged at the middle of the support plate (2), and the support rod (5) is arranged close to the second liquid outlet hole (212).

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