Leaking stoppage structure for leakage holes of foundation pit support structure in soft soil area

Abstract

The utility model discloses a leakage stoppage structure for a leakage hole of a foundation pit support structure in a soft soil area, which comprises a first stoppage structure, a second stoppage structure and a third stoppage structure which are arranged at the position of the leakage hole of the foundation pit support structure, and the first stoppage structure is a stoppage plate which is arranged on the inner side of a foundation pit and installed at the position of the leakage hole of the foundation pit support structure. The second blocking structure is formed by injecting and filling quick-setting cement slurry in a closed space formed by the blocking plate and the leakage hole, and the third blocking structure is a grouting body outside the foundation pit located on the outer side of the foundation pit support structure. The plugging device has the advantages of being simple in plugging process, convenient to construct, high in plugging speed, short in plugging period and good in plugging effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of foundation pit engineering, especially to a soft soil area foundation pit enclosure structure leakage hole plugging structure. BACKGROUND

[0002] For the soft soil area deep foundation pit, in the process of excavating to the base in the foundation pit enclosure structure, due to the large water and soil lateral pressure difference inside and outside the pit, the foundation pit enclosure structure is prone to leakage, which causes serious water, soil and sand flow, resulting in a certain area of holes in the foundation pit enclosure structure. In addition, when the foundation pit enclosure structure is constructed by the enclosure pile, due to the large change of soil layer, improper construction operation and other reasons, the distance between the local enclosure piles is too large, causing the partial submergence of the soil layer, the leakage of the water-bearing layer or the leakage of the water between the enclosure piles and the water stop curtain, causing the soil body between the enclosure piles to fall off and form a larger hole. When the distance between the enclosure pile and the water stop curtain is close and the hole is large (≥400mm), the enclosure pile cannot effectively support the water stop curtain. Since the water stop curtain is a cement soil mixing pile, deformation will cause cracking and water leakage, which poses a safety hazard to the foundation pit. If a large amount of water and soil loss is caused by leakage, it will cause excessive settlement of the soil body behind the enclosure structure, and in severe cases, it will cause the soil body behind the enclosure structure to lose resistance and cause the risk of foundation pit collapse. Therefore, plugging needs to be carried out at the leakage hole of the foundation pit enclosure structure. The common plugging method in the art is to drill a drain pipe at the leakage point and seal the surrounding of the drain pipe with a steel pipe and double quick cement. After the sealing material reaches the strength, the drain pipe valve is closed. This process may be complex and time-consuming, and the sealing effect is poor. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a soft soil area foundation pit enclosure structure leakage hole plugging structure to solve the problems of complex construction, easy removal of quick-drying cement slurry by water, soil and sand flow at the leakage hole, difficult plugging, long plugging period and poor plugging effect of the traditional foundation pit enclosure structure leakage hole sealing process.

[0004] In order to solve the above technical problems, the utility model provides a soft soil area foundation pit enclosure structure leakage hole plugging structure, which comprises a first sealing structure, a second sealing structure and a third sealing structure at the leakage hole of the foundation pit enclosure structure. The first sealing structure is a sealing plate installed at the leakage hole of the foundation pit enclosure structure on the inside of the foundation pit. The second sealing structure is quick-drying cement slurry filled in the closed space formed by the sealing plate and the leakage hole. The third sealing structure is an external grouting body located on the outside of the foundation pit enclosure structure.

[0005] Further, the soft soil area foundation pit enclosure structure leakage hole plugging structure provided by the utility model has the sealing plate made of a steel formwork.

[0006] Further, the soft soil area foundation pit support structure leakage hole plugging structure of the utility model, the steel formwork is welded on the section steel of the foundation pit support structure.

[0007] Further, the soft soil area foundation pit support structure leakage hole plugging structure of the utility model, the steel formwork is welded on the section steel of the foundation pit support structure.

[0008] Further, the soft soil area foundation pit support structure leakage hole plugging structure of the utility model, the steel formwork is welded on the section steel of the foundation pit support structure.

[0009] Compared with the prior art, the soft soil area foundation pit support structure leakage hole plugging structure of the utility model has the beneficial effects as follows:

[0010] The soft soil area foundation pit support structure leakage hole plugging structure of the utility model is closed and plugged at the leakage hole of the foundation pit support structure through the first plugging structure, so that the soil loss at the leakage hole is prevented, and the safety hazards caused by the water, soil and sand flowing into the foundation pit are avoided; the leakage hole of the foundation pit support structure is internally filled and plugged through the second plugging structure on the inner side of the foundation pit, so that the risk of the first plugging structure being separated from the foundation pit support structure and the leakage hole being continuously enlarged due to the impact of the excessive pressure of the soil outside the pit on the first plugging structure is prevented; the leakage hole of the foundation pit support structure is externally filled and plugged through the third plugging structure on the outer side of the foundation pit, so that the soil on the outer side of the foundation pit support structure is reinforced to prevent collapse; the leakage hole of the foundation pit support structure is plugged through the three plugging structures, so that the safety of the foundation pit support structure is ensured, and the safety risk of the collapse and settlement of the foundation pit is reduced. The utility model has the advantages of simple plugging process, convenient construction, fast plugging speed, short plugging period and good plugging effect. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is the elevation structure schematic view of the soft soil area foundation pit support structure leakage hole plugging structure;

[0012] Fig. 2 is the plan structure schematic view of the soft soil area foundation pit support structure leakage hole plugging structure;

[0013] The drawings show that:

[0014] 100, soft soil area foundation pit retaining structure leakage hole plugging structure, 110, first sealing structure, 111, steel mesh, 120, second sealing structure, 130, third sealing structure, 140, foundation pit retaining structure, 141, profiled steel, 142, water stop curtain, 143, leakage hole, 150, backfill soil, 160, double liquid grouting pipe, 170, earthwork excavation surface, 180, enclosing purlin, 190, first support. DETAILED DESCRIPTION

[0015] The utility model will be described in detail below in combination with the drawings: the advantages and characteristics of the utility model will be more clear according to the following description.It should be noted that the drawings all adopt very simplified form and all use non-precise proportion, only to facilitate, clearly assist the purpose of the utility model embodiment.

[0016] Please refer to Figs. 1-2 The utility model embodiment provides a soft soil area foundation pit retaining structure leakage hole plugging structure 100, including the first sealing structure 110, the second sealing structure 120 and the third sealing structure 130 at the leakage hole 143 of foundation pit retaining structure 140, the first sealing structure 110 is the sealing plate of being installed at the leakage hole 143 of foundation pit retaining structure 140 in the inside of foundation pit, the second sealing structure 120 is the quick dry cement slurry of being filled in the closed space formed by sealing plate and leakage hole 143, the third sealing structure 130 is the grouting body outside the pit of being located at the outside of foundation pit retaining structure 140.Wherein foundation pit retaining structure 140 can be composed of profiled steel 141 and water stop curtain 142.In order to quickly carry out engineering emergency construction to leakage hole 143, can be carried out the double liquid grouting through double liquid grouting pipe 160 to leakage hole 143 by the hole drilling outside the pit outside foundation pit retaining structure 140 to the third sealing structure 130.

[0017] The utility model embodiment provides a soft soil area foundation pit retaining structure leakage hole plugging structure 100, in order to resist the fluid pressure at leakage hole 143, the sealing plate can be steel formwork, in order to improve the reliability connection of steel formwork and the strength of resisting fluid pressure, steel formwork can be welded on the profiled steel 141 of foundation pit retaining structure 140.

[0018] The utility model embodiment provides a soft soil area foundation pit retaining structure leakage hole plugging structure 100, the sealing plate can be wood formwork, and the steel mesh 111 is connected on foundation pit retaining structure 140 on the outside of wood formwork.This time, steel mesh 111 can be welded on the profiled steel 141 of foundation pit retaining structure 140.Steel mesh 111 can improve the connection strength of wood formwork fixed on foundation pit retaining structure 140, improve its resistance.

[0019] The soft soil area foundation pit support structure leakage hole plugging method and structure 100 provided by the embodiment of the utility model, through the first plugging structure 110, the leakage hole 143 of the foundation pit support structure 140 is closed and plugged, so that the soil body at the leakage hole 143 is prevented from continuing to flow, and the safety hazard caused by the water, soil and sand flowing into the foundation pit from the leakage hole 143 is avoided; through the second plugging structure 120, the leakage hole 143 of the foundation pit support structure 140 is internally filled and plugged on the inner side of the foundation pit, so that the risk that the first plugging structure 110 is separated from the foundation pit support structure 140 and the leakage hole 143 is continuously enlarged due to the impact of the excessive pressure of the soil body outside the pit on the first plugging structure 110 is prevented; through the third plugging structure 130, the leakage hole 143 of the foundation pit support structure 140 is externally filled and plugged on the outer side of the foundation pit, so that the soil body on the outer side of the foundation pit support structure 140 is reinforced to prevent collapse; through the three plugging structures, the leakage hole 143 of the foundation pit support structure 140 is plugged, so that the safety of the foundation pit support structure 140 is ensured, and the safety risk of the collapse and settlement of the foundation pit is reduced. The embodiment of the utility model has the advantages of simple plugging process, convenient construction, fast plugging speed, short plugging cycle and good plugging effect.

[0020] The utility model is not limited to the above-mentioned specific implementation, obviously, the above-mentioned described embodiment is the embodiment of the utility model embodiment, but is not all the embodiment. Based on the described embodiment of the utility model, all other embodiments obtained by the ordinary skill in the art belong to the range of the utility model protection. The skilled in the art can make other levels of modification and change to the utility model. Thus, if these modifications and changes of the utility model are within the scope of the claims of the utility model, the utility model also intends to include these changes and modifications.

Claims

1. A leakage hole plugging structure for a foundation pit retaining structure in a soft soil area, characterized by, The first sealing structure is a sealing plate installed at the leakage hole of the foundation pit support structure on the inside of the foundation pit; the second sealing structure is a quick-drying cement slurry filled in the closed space formed by the sealing plate and the leakage hole; and the third sealing structure is a pit-external grouting body on the outside of the foundation pit support structure.

2. The leakage hole plugging structure for a foundation pit support structure in soft soil regions according to claim 1, characterized by, The sealing plate is a steel formwork.

3. The leakage hole plugging structure for a foundation pit support structure in soft soil regions according to claim 2, characterized by, The steel formwork is welded to the section steel of the foundation pit support structure.

4. The leakage hole plugging structure for a foundation pit support in a soft soil region according to claim 1, characterized by, The sealing plate is a wooden formwork, and a steel mesh is connected to the foundation pit support structure on the outside of the wooden formwork.

5. The leakage hole plugging structure of a foundation pit support in soft soil area according to claim 4, characterized in that, The steel mesh is welded to the section steel of the foundation pit support structure.

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