A water retaining structure for emergency rescue of local pipe burst in deep foundation pit

Abstract

The utility model relates to a water retaining structure for local pipe burst rescue in deep foundation pits, comprising at least one group of first support components and two groups of second support components; the two groups of second support components are respectively connected to the support systems on both sides of the foundation pit, the first support component is arranged between the two groups of second support components, the two groups of second support components and one group of first support components are connected to the dam body component; a plurality of groups of obliquely arranged tensioning components are connected between the two groups of second support components and one group of first support components. The purpose of the utility model is to overcome the existing defects and provide a water retaining structure for local pipe burst rescue in deep foundation pits, which has strong size adaptability, low installation precision requirements, convenient installation and dismantling construction, low one-time investment cost as emergency backup materials, and turnover and repeated use.

Description

Technical Field

[0001] The utility model relates to a water retaining structure for emergency rescue of local pipe bursts in a deep foundation pit. Background Art

[0002] The long deep foundation pit of the open-cut method has the characteristic that its length is much greater than its width, and it is in the shape of a long strip. During the construction process, it is usually divided into multiple relatively independent foundation pits and constructed in sections.

[0003] During the excavation of foundation pits under the geological conditions of pressurized water, water and sand gushing often occurs in parts of the foundation pit due to sudden changes in local geological conditions, defects in the sealing quality of geological exploration drilling holes, failure to meet the requirements of anti-surge design, insufficient precipitation and pressure reduction, ancient wells and other factors, leading to dangerous pipe bursts.

[0004] Since the bottom slope of most long strip foundation pits is small, the impact range expands rapidly with the increase of water inflow, causing the adjacent water flow working surface or a larger area to stop work, and even affecting the protection of the finished products of the completed section. At the same time, the small slope is not conducive to the rise of water level and the rapid balance of the pressure head. At present, there are very few methods to deal with the local pipe burst danger of long strip foundation pits with open excavation method. In the treatment process, grouting and plugging are often considered first. When grouting and plugging cannot achieve the desired effect, the addition of pressure relief wells is considered. Usually, the addition of pressure relief wells takes a long time, resulting in an increase in the safety risk of the foundation pit; as the water level in the foundation pit rises, the affected working surface increases, thereby increasing the economic losses.

[0005] Therefore, in view of the above problems, a water retaining structure for emergency rescue of local pipe burst in deep foundation pit is proposed. Utility Model Content

[0006] The purpose of the utility model is to overcome the existing defects and provide a water retaining structure for local pipe burst rescue in deep foundation pits. The structure has strong dimensional adaptability and low installation precision requirements, and has the advantages of convenient installation and dismantling construction, low one-time investment cost as emergency spare materials, and turnover and repeated use.

[0007] The technical solution to achieve the above-mentioned purpose is: a water retaining structure for local pipe burst rescue in a deep foundation pit, comprising at least one group of first support assemblies and two groups of second support assemblies; the two groups of second support assemblies are respectively connected to the support systems on both sides of the foundation pit, the first support assembly is arranged between the two groups of second support assemblies, and the two groups of second support assemblies and one group of first support assemblies are connected to the dam body assembly; a plurality of groups of obliquely arranged tensioning assemblies are connected between the two groups of second support assemblies and one group of first support assemblies.

[0008] Preferably, the first supporting assembly includes a first base and a first armrest, the first armrest is connected to one end of the first base, and the first base is connected to the bottom surface of the foundation pit; a plurality of first connecting plates are respectively connected to both sides of the first base and the first armrest, and a first through hole is opened on the first connecting plate.

[0009] Preferably, the second support assembly includes a second base and a second armrest, the second armrest is connected to one end of the second base, and the second base and the second armrest are connected to a water-swellable rubber waterstop plate on one side close to the support system, and the water-swellable rubber waterstop plate is connected to the support system through expansion bolts;

[0010] A plurality of second connecting plates are connected to the side walls of the second base and the second armrest, and second through holes are formed on the second connecting plates.

[0011] Preferably, the dam assembly comprises a dam body, the lower end of the dam body is connected to the first base and the second base in a plane, and the side wall of the dam body is connected to the first armrest and the second armrest;

[0012] At least two water injection chambers are arranged in the dam body, and each of the water injection chambers is provided with a water injection port at the upper end and a water discharge port at the lower end.

[0013] Preferably, the tensioning assembly includes a tensioner and two hooks, the two hooks are respectively connected to two ends of the tensioner, and the two hooks are respectively hung on the adjacent first connecting plate and the second connecting plate.

[0014] Preferably, both ends of the dam body are connected with edge pressing strips, and the other end of the edge pressing strip is connected between the water-swellable rubber waterstop plate and the side wall of the support system.

[0015] Preferably, the side wall of the dam body is connected to a bottom pressure belt, and the other end of the bottom pressure belt is located on the bottom surface of the foundation pit and is buried with covering soil.

[0016] The beneficial effects of the utility model are as follows: the water retaining structure used for local pipe burst rescue in deep foundation pits is provided with two groups of second support components respectively connected to the support systems on both sides of the foundation pit, the first support component is provided between the two groups of second support components, the two groups of second support components and one group of first support components are connected to the dam body component; multiple groups of obliquely arranged tensioning components are connected between the two groups of second support components and one group of first support components; the prefabricated assembly method is adopted, the size adaptability is strong, the installation precision requirement is low, and the advantages of convenient installation and dismantling construction, low one-time investment cost as emergency spare materials, and turnover and repeated use are provided. After the water retaining structure is provided, the local water level can be quickly raised, which is conducive to the balance of the pressure head and reduces the degree of danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the water retaining structure of the utility model;

[0018] Figure 2 It is a side view of the water retaining structure of the utility model;

[0019] Figure 3 It is a side view of the first support assembly and the second support assembly of the utility model;

[0020] Figure 4 It is a top view of the first support assembly and the second support assembly of the utility model;

[0021] Figure 5 It is a detailed view of the first support assembly of the utility model;

[0022] Figure 6 It is a detailed view of the second support assembly of the utility model;

[0023] Figure 7 This is a detailed diagram of the water-expanding rubber waterstop plate of the utility model;

[0024] Figure 8 It is a detailed diagram of the dam body of the utility model;

[0025] Fig. 9 It is a side view of the dam body of the utility model;

[0026] Fig.10 It is a detailed diagram of the tensioning assembly of the utility model;

[0027] Fig.11 It is a detail view of the first connecting plate of the utility model.

[0028] In the figure: 1. foundation pit; 2. first base; 3. first armrest; 4. first connecting plate; 5. first through hole; 6. second base; 7. second armrest; 8. support system; 9. water-swelling rubber waterstop; 10. dam body; 11. water injection chamber; 12. water injection port; 13. water discharge port; 14. tensioner; 15. hook; 16. side pressure belt; 17. bottom pressure belt. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] The utility model will be further described below in conjunction with the accompanying drawings.

[0031] like Figure 1-11 As shown, a water retaining structure for local pipe burst rescue in a deep foundation pit comprises at least one group of first support assemblies and two groups of second support assemblies. The first support assemblies can be increased or decreased as appropriate according to the width of the foundation pit 1; the two groups of second support assemblies are respectively connected to the support system 8 on both sides of the foundation pit 1, the first support assembly is arranged between the two groups of second support assemblies, and the two groups of second support assemblies and one group of first support assemblies are connected to the dam body assembly; a plurality of groups of obliquely arranged tensioning assemblies are connected between the two groups of second support assemblies and one group of first support assemblies.

[0032] Specifically, the first supporting assembly includes a first base 2 and a first arm 3, the first arm 3 is connected to one end of the first base 2, and the first base 2 is connected to the bottom surface of the foundation pit 1; a plurality of first connecting plates 4 are respectively connected to both sides of the first base 2 and the first arm 3, and a first through hole 5 is opened on the first connecting plate 4.

[0033] Specifically, the second support assembly includes a second base 6 and a second arm 7, the second arm 7 is connected to one end of the second base 6, the second base 6 and the second arm 7 are connected to a water-swelling rubber waterstop plate 9 on one side close to the support system 8, and the water-swelling rubber waterstop plate 9 is connected to the support system 8 through expansion bolts; a plurality of second connecting plates are connected to the side walls of the second base 6 and the second arm 7, and a second through hole is opened on the second connecting plate. The water-swelling rubber waterstop plate 9 can play a waterproof role.

[0034] Specifically, in order to reduce weight and facilitate installation and disassembly, the first armrest 3 and the second armrest 7 have multiple holes to reduce the weight of the material itself; the first base 2 and the first armrest 3 are connected by welding; the second base 6 and the second armrest 7 are connected by welding.

[0035] Specifically, the first base 2 and the first arm 3 as well as the second base 6 and the second arm 7 have the advantage of anti-overturning self-balancing. After the dam is flushed with water, the horizontal force acts on the arm to generate an overturning moment, and the gravity acts on the base to generate an anti-overturning moment. This structural form does not require the additional anti-overturning device.

[0036] Specifically, the dam assembly includes a dam body 10, the lower end of the dam body 10 is connected to the first base 2 and the second base 6 in a plane, and the side wall of the dam body 10 is connected to the first armrest 3 and the second armrest 7; at least two water injection chambers 11 are arranged in the dam body 10, and each water injection chamber 11 is provided with a water injection port 12 at the upper end and a water discharge port 13 at the lower end. There can also be multiple water injection chambers 11, and multiple water injection ports 12 can be filled with water at the same time so that the dam body 10 can be quickly filled with water, which is convenient for improving work efficiency. The dam body is made of polymer flexible material.

[0037] Specifically, the side wall of the dam body 10 is connected to a bottom pressure belt 17, and the other end of the bottom pressure belt 17 is located on the bottom surface of the foundation pit 1 and buried in the soil. Both ends of the dam body 10 are connected to a side pressure belt 16, and the other end of the side pressure belt 16 is connected between the water-expanding rubber waterstop plate 9 and the side wall of the support system 8. The bottom pressure belt 17 is buried in the soil to prevent water from flowing out from the bottom of the dam body. The side pressure belt 16 is sandwiched between two waterproof strips and fixed to the support system 8 through the second armrest 7 to prevent water from flowing out from the side of the dam body.

[0038] Specifically, the tensioning assembly includes a tensioner 14 and two hooks 15, the two hooks 15 are respectively connected to the two ends of the tensioner 14, and the two hooks 15 are respectively hung on the adjacent first connecting plate 4 and the second connecting plate. The hooks 15 are hung on the first through hole 5 on the first connecting plate 4 and the second through hole on the second connecting plate to provide rigidity for the supporting structure system and ensure the stability outside the supporting structure plane.

[0039] Specifically, the first base 2, the first arm 3, the second base 6, the second arm 7, the hook 15, the first connecting plate 4 and the second connecting plate are all made of steel.

[0040] Specifically, when a water gushing point is found in the foundation pit 1, the water is first drained out of the foundation pit 1 by drainage and water collection, and the scope and depth of water accumulation in the foundation pit 1 are controlled. Then the treatment scope is determined. If water is required on both sides, a water retaining structure needs to be installed on both sides of the water gushing point. If water is only required on one side, a water retaining structure can be set. Level the bottom surface of the foundation pit where the water retaining structure is to be installed. Install the second base 6 and the second armrest 7 on both sides of the foundation pit 1, connect the water-expanding rubber waterstop plate 9 on one side of the second base 6 and the second armrest 7, connect the water-expanding rubber waterstop plate 9 to the support system 8 through expansion bolts, and connect the pressure strips 16 connected at both ends of the dam body 10 between the water-expanding rubber waterstop plate 9 and the side wall of the support system 8. Then install the first base 2 and the first armrest 3 in the middle. The number of the first base 2 and the first armrest 3 is set as appropriate according to the width of the foundation pit 1, and the interval is 6 to 9m; then install multiple sets of tensioning components, and hang the hooks 15 at both ends of the tensioner 14 on the adjacent first connecting plate 4 and the second connecting plate respectively. The hook 15 is hung on the first through hole 5 on the first connecting plate 4 and the second through hole on the second connecting plate to provide rigidity for the supporting structure system and ensure the stability outside the supporting structure plane; the water retaining supporting structure system is completed. The bottom of the foundation pit 1 is grooved to bury the bottom pressure belt 17 and cover it with soil. Then the water injection port 12 of the dam body 10 is connected to the water source to inject water, and the water retaining structure is formed. After the danger is eliminated, the water is drained through the drainage hole 13, and the water retaining structure is dismantled for recycling.

[0041] This water retaining structure used for local pipe burst rescue in deep foundation pits is all prefabricated and assembled, with strong size adaptability and low installation precision requirements. It has the advantages of convenient installation and dismantling, low one-time investment cost as emergency backup materials, and turnover and repeated use. After the water retaining structure is set up, the local water level can be raised quickly, which is conducive to the balance of the pressure head and reduces the degree of danger.

[0042] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A water retaining structure for emergency rescue of local pipe burst in deep foundation pit, characterized in that: It comprises at least one group of first support assemblies and two groups of second support assemblies; the two groups of the second support assemblies are respectively connected to the support systems (8) on both sides of the foundation pit (1); the first support assembly is arranged between the two groups of the second support assemblies; the two groups of the second support assemblies and one group of the first support assemblies are connected to the dam body assembly; and a plurality of groups of obliquely arranged tensioning assemblies are connected between the two groups of the second support assemblies and one group of the first support assemblies; The first supporting assembly comprises a first base (2) and a first arm (3), wherein the first arm (3) is connected to one end of the first base (2), and the first base (2) is connected to the bottom surface of the foundation pit (1); a plurality of first connecting plates (4) are respectively connected to both sides of the first base (2) and the first arm (3), and the first connecting plates (4) are provided with first through holes (5); The second supporting assembly comprises a second base (6) and a second armrest (7), the second armrest (7) being connected to one end of the second base (6), and a water-swellable rubber waterstop plate (9) being connected to one side of the second base (6) and the second armrest (7) close to the supporting system (8), and the water-swellable rubber waterstop plate (9) being connected to the supporting system (8) via expansion bolts; A plurality of second connecting plates are connected to the side walls of the second base (6) and the second armrest (7), and second through holes are formed on the second connecting plates; The tensioning assembly comprises a tensioner (14) and two hooks (15), wherein the two hooks (15) are respectively connected to two ends of the tensioner (14), and the two hooks (15) are respectively hung on an adjacent first connecting plate (4) and a second connecting plate.

2. The water retaining structure for emergency rescue of local pipe burst in deep foundation pit according to claim 1 is characterized in that: The dam body assembly comprises a dam body (10), the lower end of the dam body (10) is connected to the first base (2) and the second base (6) in a planar manner, and the side wall of the dam body (10) is connected to the first support arm (3) and the second support arm (7); At least two water injection chambers (11) are arranged in the dam body (10), and each of the water injection chambers (11) is provided with a water injection port (12) at the upper end and a water discharge port (13) at the lower end.

3. The water retaining structure for emergency rescue of local pipe burst in deep foundation pit according to claim 2 is characterized in that: Both ends of the dam body (10) are connected to edge pressing strips (16), and the other end of the edge pressing strip (16) is connected between the water-swellable rubber waterstop plate (9) and the side wall of the support system (8).

4. The water retaining structure for emergency rescue of local pipe burst in deep foundation pit according to claim 2 is characterized in that: The side wall of the dam body (10) is connected to a bottom pressure belt (17), and the other end of the bottom pressure belt (17) is located on the bottom surface of the foundation pit (1) and is buried with covering soil.

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