Joint box of underground flexible curtain and construction method of joint box

Abstract

The invention relates to the technical field of underground engineering, and particularly discloses an underground flexible curtain joint box and a construction method thereof.The underground flexible curtain joint box comprises a plurality of joint box bodies, a plurality of tool boxes, a plurality of stirrups and a plurality of longitudinal bars, a plurality of drill holes are formed underground, the longitudinal bars are evenly distributed in parallel, the stirrups are evenly distributed in parallel, and the tool boxes are arranged in the drill holes. The longitudinal bars are perpendicular to the stirrups, and the longitudinal bars and the stirrups are welded to form a reinforcement cage. Each steel reinforcement cage is located in the drill hole, two connector boxes are arranged in each steel reinforcement cage, a tool box is fixedly connected to the interior of each connector box, and a notch is formed in one side of each connector box. The method has the advantages of simplicity and convenience in construction, low cost, environment friendliness and water stopping effect.

Description

Technical Field

[0001] The invention relates to the technical field of underground engineering, and in particular to a joint box of an underground flexible curtain and a construction method thereof. Background Art

[0002] In civil engineering construction, groundwater control during foundation pit excavation is an important issue. In order to prevent the impact of groundwater on the foundation pit and surrounding buildings and underground facilities, a water-stop curtain is usually required. Existing water-stop curtain technologies mainly include mixing piles, steel sheet piles, and underground continuous walls. However, these technologies have certain limitations and shortcomings.

[0003] Although the mixing pile technology has a fast construction speed and relatively low cost, it is easy to produce weak points and leakage points during the construction process, resulting in poor water-stopping effect. In addition, the strength and rigidity of the mixing pile are relatively low, and it may not be able to withstand the large groundwater pressure, thus affecting the stability of the foundation pit. Steel sheet piles and underground continuous walls have higher strength and rigidity and can effectively block groundwater, but the construction costs of these two methods are very high.

[0004] The construction of steel sheet piles also requires large-scale piling equipment, which causes great disturbance to the surrounding environment, generating noise and vibration. The construction of underground continuous walls requires a large amount of concrete, which increases the material cost of the project, and a large amount of mud waste is generated during the construction process, causing environmental pollution. In addition, the traditional water-stop curtain technology has high requirements for the construction site during the construction process, requiring a large working space and convenient logistics and transportation conditions, which are often difficult to meet in projects in densely populated urban areas. The existing water-stop curtain technology has shortcomings such as complex construction, high cost, large environmental impact and limited construction conditions. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a joint box of an underground flexible curtain and a construction method thereof, which can have the advantages of simple construction, low cost, environmental friendliness and water-stopping effect.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A joint box for an underground flexible curtain, comprising a plurality of joint boxes, a plurality of tool boxes, a plurality of stirrups and a plurality of longitudinal bars, a plurality of holes are drilled underground, a plurality of longitudinal bars are evenly distributed in parallel, a plurality of stirrups are evenly distributed in parallel, a plurality of longitudinal bars and a plurality of stirrups are perpendicular to each other, and a plurality of longitudinal bars and a plurality of stirrups are welded to form a steel cage; Each of the steel cages is located inside the drilled hole, and two joint boxes are arranged inside each of the steel cages. A tool box is fixedly connected to the inside of each of the joint boxes, and a slot is opened on one side of each of the joint boxes.

[0007] Furthermore, the positions of the two notches in the same steel cage are opposite.

[0008] Furthermore, concrete is provided on the inner side of the steel cage and between the two joint boxes.

[0009] Furthermore, an end cap is respectively provided on both sides of the anti-seepage membrane.

[0010] Furthermore, a guide rod is disposed outside each of the end heads.

[0011] Furthermore, each of the guide rods is located inside a joint box, and both sides of each of the anti-seepage membranes are located in a notch.

[0012] Furthermore, a friction reducer is provided between the inner wall of each joint box and the outer surface of the tool box.

[0013] Furthermore, each of the joint boxes is a PVC component with a rectangular structure, and each of the tool boxes is a C-shaped structure.

[0014] Furthermore, a rope saw is provided at the lower end of each of the anti-seepage membranes, a winch is provided at both ends of each of the rope saws, each of the winches is fixedly connected to the platform, and both ends of each of the rope saws are located in one of the guide rods.

[0015] A construction method for a joint box of an underground flexible curtain comprises the following steps: S1: drilling, excavating multiple boreholes; S2: Lower the steel cage consisting of longitudinal reinforcement and stirrups, apply friction reducer on the outer surface of the tool box, insert it into the compartment of the joint box, and then lower the whole thing to the center of the drill hole; S3: pouring concrete in the gap between the drill hole and the tool box; S4: Put the guide rod of the film planting machine into the tool box on one side of the joint box, and the rope saw at the end of the guide rod cuts the soil into grooves; S5: After the slot section is completed, the flexible anti-seepage membrane is lowered, and ends are distributed at both ends of the anti-seepage membrane to prevent the anti-seepage membrane from detaching from the slot; S6: After the anti-seepage membrane is put in place, remove the tool box and then pour the curing agent in the gap; S7: This process repeats itself to form a continuous water-stop curtain.

[0016] The beneficial effects of the present invention are: (1) By providing a joint box and a tool box, the technical effect that can be achieved is that two joint boxes are provided inside each steel cage, a tool box is fixedly connected inside each joint box, and a slot is provided on one side of each joint box; The use of joint boxes and tool boxes for construction eliminates the need for large-scale piling equipment, does not cause major disturbances to the surrounding environment, reduces noise and vibration, reduces the use of concrete, reduces material costs for the project, and avoids pollution to the environment.

[0017] (2) By setting stirrups and longitudinal reinforcements, the technical effect that can be achieved is that multiple longitudinal reinforcements are evenly distributed in parallel, multiple stirrups are evenly distributed in parallel, multiple longitudinal reinforcements and multiple stirrups are perpendicular to each other, and multiple longitudinal reinforcements and multiple stirrups are welded to form a steel cage; Stirrups and longitudinal bars can increase the rigidity of cast-in-place concrete. The longitudinal bars avoid the position of the notches. The size of the notches is suitable for the lowering of the flexible anti-seepage membrane, which facilitates the placement of the anti-seepage membrane. The anti-seepage membrane is used for waterproofing, increasing the water-stopping effect and reducing costs.

[0018] (3) By setting the tool box and the notch, the technical effect that can be achieved is that the positions of the two notches in the same steel cage are opposite. The joint box is a double-bin structure with the same size, and concrete is set on the inner side of the steel cage and between the two joint boxes; The positions of the two notches in the same steel cage are opposite to each other, the two adjacent anti-seepage membranes are parallel to each other and are not located on the same horizontal plane, so the requirements for the construction site are low and the construction process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 A top sectional view of the present invention; Figure 2 It is a partial top sectional view of the present invention; Figure 3 A top sectional view of the joint box and the tool box of the present invention; Figure 4 It is a three-dimensional diagram of the anti-seepage membrane, guide rod, rope saw and winch in the present invention; Figure 5 It is the first construction flow chart of the present invention; Figure 6 It is the second construction flow chart of the present invention; Description of main component symbols: In the figure: 1. joint box; 2. tool box; 3. notch; 4. drilling hole; 5. concrete; 6. stirrups; 7. longitudinal reinforcement; 8. anti-seepage membrane; 9. guide rod; 10. rope saw; 11. winch; 12. end. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0022] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] Reference Figures 1 to 6 , which is a joint box for an underground flexible curtain disclosed in the present invention, comprises a plurality of joint boxes 1, a plurality of tool boxes 2, a plurality of stirrups 6 and a plurality of longitudinal bars 7, a plurality of boreholes 4 are opened underground, a plurality of longitudinal bars 7 are evenly distributed in parallel, a plurality of stirrups 6 are evenly distributed in parallel, a plurality of longitudinal bars 7 and a plurality of stirrups 6 are perpendicular to each other, and a plurality of longitudinal bars 7 and a plurality of stirrups 6 are welded to form a steel cage.

[0025] The stirrups 6 and the longitudinal bars 7 can increase the rigidity of the cast-in-place concrete 5. The longitudinal bars 7 avoid the position of the notch 3. The size of the notch 3 is suitable for the lowering of the flexible impermeable membrane 8, which is convenient for the placement of the impermeable membrane 8. The impermeable membrane 8 is used for waterproofing, increasing the water-stopping effect and reducing costs.

[0026] Each steel cage is located inside the drilled hole 4, and two joint boxes 1 are arranged inside each steel cage. A tool box 2 is fixedly connected to the inside of each joint box 1. A slot 3 is opened on one side of each joint box 1, and the longitudinal reinforcement 7 avoids the position of the slot 3. The size of the slot 3 is suitable for the lowering of the flexible anti-seepage membrane 8. The internal space of the tool box 2 is suitable for the lowering of the guide rod 9 of the slotting and film planting machine.

[0027] The use of the joint box 1 and the tool box 2 for construction does not require the use of large-scale piling equipment, does not cause major disturbances to the surrounding environment, reduces the generation of noise and vibration, reduces the use of concrete 5, reduces the material cost of the project, and avoids pollution to the environment.

[0028] The positions of the two notches 3 in the same steel cage are opposite. The joint box 1 is a double-bin structure with the same size.

[0029] Concrete 5 is arranged inside the steel cage and between the two joint boxes 1 in order to increase the rigidity of the cast-in-place concrete 5 .

[0030] An end 12 is respectively arranged on both sides of the anti-seepage membrane 8. A guide rod 9 is arranged outside each end 12.

[0031] The positions of the two notches 3 in the same steel cage are opposite to each other, and the two adjacent anti-seepage membranes 8 are parallel to each other and are not located on the same horizontal plane, so the requirements for the construction site are low and the construction process is simple.

[0032] Each guide rod 9 is located inside a joint box 1 , and both sides of each anti-seepage membrane 8 are located in a groove 3 .

[0033] A friction reducer is provided between the inner wall of each joint box 1 and the outer surface of the tool box 2 , and the friction reducer is used to reduce the friction resistance between the joint box 1 and the tool box 2 .

[0034] Each joint box 1 is a PVC component of a rectangular structure, and each tool box 2 is a C-shaped structure.

[0035] A rope saw 10 is disposed at the lower end of each anti-seepage membrane 8 , and a winch 11 is disposed at both ends of each rope saw 10 . Each winch 11 is fixedly connected to the platform, and both ends of each rope saw 10 are located in a guide rod 9 .

[0036] A construction method for a joint box of an underground flexible curtain comprises the following steps: S1: drilling, excavating multiple boreholes 4; S2: Lower the steel cage composed of longitudinal reinforcement 7 and stirrups 6, apply friction reducer on the outer surface of the tool box 2, insert it into the body of the joint box 1, and then lower the whole to the center of the drill hole 4; S3: pouring concrete 5 in the gap between the drill hole 4 and the tool box 2; S4: In the tool box 2 aligned with one side of the joint box 1, the film planting machine guide rod 9 is placed down, and the rope saw 10 at the end of the guide rod 9 cuts the soil into a groove; S5: After the slot section is completed, the flexible impermeable membrane 8 is lowered, and the ends of the impermeable membrane 8 are provided with end caps 12 to prevent the impermeable membrane 8 from detaching from the slot 3; S6: After the anti-seepage membrane 8 is put in place, the tool box 2 is removed, and then the curing agent is poured into the gap; S7: This process repeats itself to form a continuous water-stop curtain.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A joint box for underground flexible curtain, characterized in that: It comprises a plurality of joint boxes (1), a plurality of tool boxes (2), a plurality of stirrups (6) and a plurality of longitudinal bars (7), a plurality of boreholes (4) are opened underground, the plurality of longitudinal bars (7) are evenly distributed in parallel, the plurality of stirrups (6) are evenly distributed in parallel, the plurality of longitudinal bars (7) and the plurality of stirrups (6) are perpendicular to each other, and the plurality of longitudinal bars (7) and the plurality of stirrups (6) are welded to form a steel cage; Each of the steel cages is located inside the drilled hole (4), two joint boxes (1) are arranged inside each of the steel cages, a tool box (2) is fixedly connected inside each of the joint boxes (1), and a slot (3) is provided on one side of each of the joint boxes (1).

2. The underground flexible curtain joint box according to claim 1, characterized in that: The positions of the two notches (3) in the same steel cage are opposite to each other.

3. The underground flexible curtain joint box according to claim 1, characterized in that: Concrete (5) is provided on the inner side of the steel cage and between the two joint boxes (1).

4. The underground flexible curtain joint box according to claim 1, characterized in that: An end cap (12) is respectively provided on both sides of the anti-seepage membrane (8).

5. The underground flexible curtain joint box according to claim 4, characterized in that: A guide rod (9) is arranged outside each end head (12).

6. The underground flexible curtain joint box according to claim 5, characterized in that: Each of the guide rods (9) is located inside a joint box (1), and both sides of each of the anti-seepage membranes (8) are located in a slot (3).

7. The underground flexible curtain joint box according to claim 1, characterized in that: A friction reducer is provided between the inner wall of each joint box (1) and the outer surface of the tool box (2).

8. The underground flexible curtain joint box according to claim 1, characterized in that: Each of the joint boxes (1) is a PVC component with a rectangular structure, and each of the tool boxes (2) is a C-shaped structure.

9. The underground flexible curtain joint box according to claim 7, characterized in that: A rope saw (10) is provided at the lower end of each of the anti-seepage membranes (8), and a winch (11) is provided at both ends of each of the rope saws (10). Each of the winches (11) is fixedly connected to the platform, and both ends of each of the rope saws (10) are located in one of the guide rods (9).

10. A construction method for a joint box of an underground flexible curtain, applied to the joint box (1) according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: drilling, excavating multiple boreholes (4); S2: lowering the steel cage composed of longitudinal reinforcement (7) and stirrups (6), applying a friction reducer on the outer surface of the tool box (2), inserting it into the chamber of the joint box (1), and then lowering the whole to the center of the drill hole (4); S3: pouring concrete (5) in the gap between the drill hole (4) and the tool box (2); S4: In a tool box (2) positioned at one side of the joint box (1), a guide rod (9) of a film planting machine is placed down, and a rope saw (10) at the end of the guide rod (9) cuts the soil into grooves; S5: After the slot section is completed, the flexible anti-seepage membrane (8) is lowered, and ends (12) are distributed at both ends of the anti-seepage membrane (8) to prevent the anti-seepage membrane (8) from detaching from the slot (3); S6: After the anti-seepage membrane (8) is put into place, the tool box (2) is removed, and then a curing agent is poured into the gap; S7: This process repeats itself to form a continuous water-stop curtain.

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