Defect-eliminating cofferdam diversion device at bottom of diversion tunnel

Abstract

The invention relates to a diversion tunnel bottom defect-eliminating cofferdam diversion device which comprises a first enclosure piece and a second enclosure piece, the first enclosure piece and the second enclosure piece both have a folded state and an unfolded state, and the first enclosure piece and the second enclosure piece are each provided with a containing cavity and an injection opening which communicate with each other. The first enclosure piece and the second enclosure piece are arranged on the base so that the first enclosure piece and the second enclosure piece can be in an unfolded state, the first enclosure piece is used for being installed at the upstream position of the tunnel defect during use, meanwhile, the second enclosure piece is used for being installed at the downstream position of the tunnel defect, and the first enclosure piece and the second enclosure piece are both matched and attached to the tunnel wall in shape; the water passing pipeline penetrates through the first enclosure piece and the second enclosure piece; and the water pumping equipment is used for pumping and discharging accumulated water between the first enclosure piece and the second enclosure piece. When in use, a medium only needs to be injected into the first enclosure piece and the second enclosure piece, so that the device is convenient and labor-saving to use, small in working strength, low in implementation cost, good in sealing and water blocking effect and high in dry land condition manufacturing capacity.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel repair construction, and in particular to a cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel. Background Art

[0002] At present, the long water diversion tunnel of the hydropower station needs to be regularly emptied and inspected to eliminate potential safety hazards in a timely manner. When cracks, leakage and other defects are found at the bottom of the tunnel and need to be eliminated and repaired, it is necessary to artificially create dry land conditions. Although the water inlet gate will be closed at this time, in fact, the water inlet gate cannot be completely closed and there is leakage. The leaked water flows into the bottom of the tunnel to form water accumulation, which increases the difficulty of creating dry land conditions.

[0003] In traditional technology, the accumulated water is usually drained by making cofferdams using soil, sandbags, and tarpaulin. However, the transportation and stacking of soil and sandbags is labor-intensive, requires a lot of people to work together, and has high implementation costs. Tarpaulin is light in texture, has poor water-blocking effect when used as a cofferdam, and has a weak ability to create dry land conditions, resulting in a large workload for drainage. Summary of the invention

[0004] Based on this, it is necessary to provide a cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel to address the problems of time-consuming and labor-intensive installation and use, high cost, and poor water-blocking effect.

[0005] The present application proposes a cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel, which comprises:

[0006] A first enclosure member and a second enclosure member, wherein the first enclosure member and the second enclosure member both have a folded state and an expanded state, and the first enclosure member and the second enclosure member are both provided with a connected receiving cavity and an injection port, and the injection port is used to inject a medium into the receiving cavity so that the first enclosure member and the second enclosure member are in an expanded state, and when in use, the first enclosure member is used to be installed at an upstream position of a tunnel defect, and the second enclosure member is used to be installed at a downstream position of a tunnel defect, and the shapes of the first enclosure member and the second enclosure member are both adapted to fit the shape of the tunnel wall;

[0007] A water pipe, the water pipe is passed through the first enclosure member and the second enclosure member;

[0008] A pumping device is used to pump out the accumulated water between the first enclosure member and the second enclosure member.

[0009] The technical solution of this application is further described below:

[0010] In one embodiment, the first enclosure member and the second enclosure member both include a rubber bag, the rubber bag is provided with the receiving cavity and the injection port, and a one-way valve is provided at the injection port;

[0011] The rubber bag is also provided with an installation through hole, and the water pipe is passed through the installation through hole.

[0012] In one embodiment, the hole wall of the installation through hole protrudes along the direction of the hole center line to form at least two annular ribs, and each of the annular ribs abuts against the outer tube wall of the water pipe to form a sealing structure.

[0013] In one embodiment, after gas is injected into the rubber bag through the injection port, the rubber bag is formed into an airbag, and the outer wall of the airbag can be closely attached to the tunnel wall.

[0014] In one of the embodiments, after liquid is injected into the rubber bag through the injection port, the rubber bag is formed into a water bag, and the outer wall of the water bag can be closely attached to the tunnel wall.

[0015] In one embodiment, the rubber bag has an arc-shaped outer wall, and the first enclosure member and the second enclosure member further include an elastic plate, which is arranged on the arc-shaped outer wall, and in the unfolded state, the elastic plate is used to cling to the tunnel wall.

[0016] In one embodiment, the elastic plates are provided in plurality, and the plurality of elastic plates are arranged side by side and spaced apart along the extending direction of the arc-shaped outer wall;

[0017] Alternatively, a plurality of the elastic plates are arranged side by side along the extension direction of the arc-shaped outer wall, and two adjacent elastic plates are rotatably connected via a rotating member.

[0018] In one of the embodiments, the cofferdam diversion device for eliminating defects at the bottom of the water diversion tunnel also includes a chemical slurry, and the chemical slurry is used to fill the gap between the elastic plate and the tunnel wall to seal the gap.

[0019] In one embodiment, the pumping equipment includes a pump and a pumping pipe. The pump is arranged in the working area enclosed by the first enclosure and the second enclosure. One end of the pumping pipe is connected to the pump, and the other end of the pumping pipe extends to the outside of the first enclosure or the second enclosure.

[0020] In one embodiment, the water pump is a submersible sewage pump.

[0021] When the diversion device of the cofferdam for defect elimination at the bottom of the water diversion tunnel of this solution is in use, the first enclosure member and the second enclosure member, which are in a retracted state, have a small volume and a light weight, are transported to the tunnel defect position, and then a medium is injected into the accommodation cavity through the injection port. The first enclosure member and the second enclosure member gradually expand and can quickly switch from the retracted state to the deployed state. At this time, the first enclosure member is installed at the upstream position of the tunnel defect and is tightly sealed against the tunnel wall, and the second enclosure member is installed at the downstream position of the tunnel defect and is tightly sealed against the tunnel wall. Immediately afterwards, the water passing pipe is installed through the first enclosure member and the second enclosure member, so that the water leakage in the tunnel can flow through the water passing pipe normally and be discharged from the tunnel, and the accumulated water located between the first enclosure member and the second enclosure member and submerging the tunnel defect can be pumped out to the outside of the first enclosure member and the second enclosure member by a pumping device, thereby quickly and reliably creating a dry ground condition, which is convenient for repairing the tunnel defect enclosed. Compared with the prior art, the first enclosure member and the second enclosure member can be in a retracted state and can be quickly and conveniently transported to the construction site in the tunnel with less effort. And when in use, only a medium (gas or liquid) needs to be injected. It is not only convenient and labor-saving to use, has a small workload and labor intensity, and a low implementation cost, but also has a good sealing and water blocking effect and a strong ability to create a dry ground condition, which helps to complete the tunnel defect elimination construction more quickly and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a front view structural schematic diagram of the diversion device of the cofferdam for defect elimination at the bottom of the water diversion tunnel in an embodiment.

[0025] Figure 2 It is Figure 1 Another perspective view of

[0026] Description of the reference numerals:

[0027] 100. Defect elimination cofferdam diversion device at the bottom of the water diversion tunnel; 10. First enclosure member; 20. Second enclosure member; 10a. Receiving cavity; 10b. Injection port; 30. Water passing pipeline; 40. Pumping equipment; 41. Water pump; 42. Pumping pipeline; 50. Elastic plate; 60. Chemical slurry; 70. Working area; 200. Tunnel; 210. Tunnel defect. Detailed implementation manners

[0028] To make the above objects, features and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0029] In the present application, if the terms "first" and "second" appear, these terms are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plural" appears, the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In the present application, unless otherwise clearly defined and limited, if the terms "installed", "connected", "connected to", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited.

[0031] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0032] Refer to Figure 1 and Figure 2 , which shows a defect elimination cofferdam diversion device at the bottom of the water diversion tunnel according to an embodiment of the present application, and is applied to the daily maintenance work of the long water diversion tunnel of the hydropower station in the occasion where the tunnel wall of the tunnel 200 has defects and needs to be eliminated.

[0033] Exemplarily, the diversion device for defect repair at the bottom of the water diversion tunnel includes a first enclosure member 10, a second enclosure member 20, a water passing pipe 30, and a pumping device 40.

[0034] Both the first enclosure member 10 and the second enclosure member 20 have a retracted state and an expanded state. The first enclosure member 10 and the second enclosure member 20 are both provided with a communicating receiving cavity 10a and an injection port 10b. The injection port 10b is used to inject a medium into the receiving cavity 10a so that the first enclosure member 10 and the second enclosure member 20 form an expanded state. In use, the first enclosure member 10 is used to be installed at the upstream position of the tunnel defect 210, and at the same time, the second enclosure member 20 is used to be installed at the downstream position of the tunnel defect 210. The outer shapes of the first enclosure member 10 and the second enclosure member 20 are both adapted to and fit the shape of the tunnel wall; the water passing pipe 30 is arranged through the first enclosure member 10 and the second enclosure member 20; the pumping device 40 is used to pump out the accumulated water between the first enclosure member 10 and the second enclosure member 20.

[0035] Taking the tunnel 200 with a common circular cross-section as an example, when in the expanded state, both the first enclosure member 10 and the second enclosure member 20 are formed into a semi-circular shape or approximately semi-circular shape. In this way, the convex arc-shaped outer walls of the first enclosure member 10 and the second enclosure member 20 can be adapted to and fit the concave arc-shaped tunnel wall, forming a better water blocking effect on the leakage.

[0036] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: When the diversion device for defect elimination and cofferdam at the bottom of the water diversion tunnel of this solution is in use, the first enclosure member 10 and the second enclosure member 20 in the retracted state, which are small in volume and light in weight, are transported to the position of the tunnel defect 210. Then, a medium is injected into the receiving cavity 10a through the injection port 10b. The first enclosure member 10 and the second enclosure member 20 gradually expand and can quickly switch from the retracted state to the deployed state. At this time, the first enclosure member 10 is installed at the upstream position of the tunnel defect 210 and is tightly sealed against the tunnel wall, and the second enclosure member 20 is installed at the downstream position of the tunnel defect 210 and is tightly sealed against the tunnel wall. Immediately afterwards, the water passing pipe 30 is installed through the first enclosure member 10 and the second enclosure member 20, so that the water leakage in the tunnel 200 can flow through the water passing pipe 30 normally and be discharged from the tunnel 200. The accumulated water located between the first enclosure member 10 and the second enclosure member 20 and submerging the tunnel defect 210 can be pumped out to the outside of the first enclosure member 10 and the second enclosure member 20 by the pumping device 40, thereby quickly and reliably creating a dry ground condition, which is convenient for repairing the tunnel defect 210 enclosed. Compared with the prior art, the first enclosure member 10 and the second enclosure member 20 can be in the retracted state and can be quickly and conveniently transported to the construction site in the tunnel 200 with less effort. And when in use, only a medium (gas or liquid) needs to be injected. It is not only convenient and labor-saving to use, with small workload and labor intensity, low implementation cost, but also has good sealing and water blocking effect, and strong ability to create dry ground conditions, which helps to complete the defect elimination construction of the tunnel 200 more quickly and efficiently.

[0037] It is easy to understand that after injecting the medium into the receiving cavity 10a, the self-weights of the first enclosure member 10 and the second enclosure member 20 are superimposed on the weight of the medium, so that the first enclosure member 10 and the second enclosure member 20 can effectively adhere to the tunnel wall, avoid water leakage through, and reduce the pumping and drainage workload of the tunnel defect 210 part.

[0038] On the basis of the above embodiment, both the first enclosure member 10 and the second enclosure member 20 include rubber bags. The rubber bags are provided with a receiving cavity 10a and an injection port 10b, and a one-way valve is arranged at the injection port 10b. The rubber bag has excellent expansion (deployment) and retraction capabilities, and good repeat applicability. In the retracted state, the rubber bag is folded up with a small volume, which is convenient for storage, carrying and transportation. After being transported to the defect elimination position of the tunnel 200, a medium is injected into the receiving cavity 10a through the injection port 10b, and the rubber bag can expand and deploy by itself. Immediately afterwards, the two rubber bags are respectively placed at the upstream and downstream positions of the tunnel defect 210, which is very convenient and labor-saving to use, and there is no need to carry out on-site cumbersome and labor-intensive construction operation contents such as piling up, placing, and stirring.

[0039] The arranged one-way valve is used to prevent the medium from leaking out of the rubber bag.

[0040] Please continue to refer to Figure 1 and Figure 2 , the rubber bag is also provided with an installation through-hole, and the water passing pipe 30 passes through the installation through-hole. The installation through-hole is used for the water passing pipe 30 to pass through and be installed. One end of the water passing pipe 30 extends to the outside of the first baffle 10, and the other end extends to the outside of the second baffle 20. When the leaked water blocked by the first baffle 10 accumulates to a certain height, it will flow into the water passing pipe 30 by itself, and finally be discharged from the other end of the water passing pipe 30 to the outside of the second baffle 20, which will not affect the creation of a dry ground condition at the tunnel defect 210 part, and at the same time avoid increasing the drainage workload; furthermore, the weight of the water passing pipe 30 and the weight of the water flowing through the pipe also have a stabilizing effect on the first baffle 10 and the second baffle 20, improving the installation stability of the first baffle 10 and the second baffle 20.

[0041] Furthermore, in another embodiment, at least two annular ribs are formed by the hole wall of the installation through-hole protruding along the direction of the hole center line, and each annular rib abuts against the outer pipe wall of the water passing pipe 30 to form a sealing structure. Therefore, at least two sealing structures can be formed between the hole wall of the installation through-hole and the water passing pipe 30, forming at least two sealing and water-blocking effects on water, preventing water from flowing into the construction operation area surrounded by the first baffle 10 and the second baffle 20 through the installation through-hole, increasing the difficulty of creating a dry ground condition, and increasing the drainage load.

[0042] It is easy to understand that the medium injected into the rubber bag can be gas or liquid. Specifically, in one embodiment, when gas is injected into the rubber bag through the injection port 10b, the rubber bag forms an airbag, and the outer wall of the airbag can closely adhere to the tunnel wall.

[0043] In another embodiment, when liquid is injected into the rubber bag through the injection port 10b, the rubber bag forms a water bag, and the outer wall of the water bag can closely adhere to the tunnel wall.

[0044] Among them, when gas is injected into the rubber bag, the staff can carry a small-volume inflator with them, and the gas can be the air in the tunnel 200; when liquid is injected into the rubber bag, the staff can carry a small-volume water pump with them, and the water can be the accumulated water in the tunnel 200, which is convenient to obtain materials and is convenient, efficient and convenient to use.

[0045] Please continue to refer to Figure 1 , in addition, on the basis of any of the above embodiments, the rubber bag has an arc-shaped outer wall, and the first baffle 10 and the second baffle 20 also each include an elastic plate 50, and the elastic plate 50 is arranged on the arc-shaped outer wall, and in the unfolded state, the elastic plate 50 is used to closely adhere to the tunnel wall.

[0046] The elastic plate 50 is a rubber plate with a certain weight and elasticity. When the first retaining member 10 and the second retaining member 20 are in the retracted state, the elastic plate 50 shapes and presses the retracted rubber bag to prevent the rubber bag from spreading. When the first retaining member 10 and the second retaining member 20 are deployed, the elastic plate 50 is located at the bottom of the rubber bag, which not only positions and maintains the shape of the rubber bag in the deployed state, but also lowers the center of gravity of the first retaining member 10 and the second retaining member 20 to improve the installation stability. At the same time, the elastic plate 50 has a certain hardness, which can better adhere to the tunnel wall to obtain a better water-blocking effect.

[0047] Furthermore, multiple elastic plates 50 are provided. The multiple elastic plates 50 are arranged side by side at intervals along the extending direction of the arc-shaped outer wall; alternatively, the multiple elastic plates 50 are arranged side by side along the extending direction of the arc-shaped outer wall, and adjacent two elastic plates 50 are rotatably connected through a rotating member. On the one hand, the size of a single elastic plate 50 is smaller, which is more convenient to install on the rubber bag. On the other hand, the multiple elastic plates 50 are evenly installed on the bottom arc-shaped wall of the rubber bag, which has a better supporting and positioning effect on the rubber bag, and can also be more completely and larger-area closely adhered to the tunnel wall, improving the water-blocking effect.

[0048] Please continue to refer to Figure 2 , in actual use, there will inevitably be local damage or arc deformation errors on the tunnel wall, resulting in gaps of different sizes and positions between the tunnel wall and the elastic plate 50. In view of this, in one embodiment, the water diversion tunnel bottom defect cofferdam diversion device further includes a chemical slurry 60, and the chemical slurry 60 is used to fill the gaps between the elastic plate 50 and the tunnel wall to seal the gaps. Thus, water leakage into the tunnel defect 210 area (that is, within the operation area 70 surrounded by the first retaining member 10 and the second retaining member 20, and the tunnel defect 210 area is also within this area) is completely blocked.

[0049] In an alternative embodiment, the pumping device 40 includes a water pump 41 and a pumping pipeline 42. The water pump 41 is arranged within the operation area 70 surrounded by the first retaining member 10 and the second retaining member 20. One end of the pumping pipeline 42 is connected to the water pump 41, and the other end of the pumping pipeline 42 extends out of the first retaining member 10 or the second retaining member 20. By starting the water pump 41, the accumulated water within the operation area 70 can be quickly pumped out of the operation area 70 through the pumping pipeline 42, thereby creating a dry condition, which is convenient for repairing the tunnel defect 210.

[0050] Optionally, the repair construction methods include but are not limited to crack grouting with mortar, excavation of the defect area and then re-construction, etc.

[0051] Considering that the accumulated water in the operation area 70 may contain particulate impurities of different sizes, etc., in order to avoid blockage and damage of the water pump 41 during pumping and drainage, in one embodiment, the water pump 41 is a submersible sewage pump.

[0052] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0053] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel, characterized in that: include: A first enclosure member and a second enclosure member, wherein the first enclosure member and the second enclosure member both have a folded state and an expanded state, and the first enclosure member and the second enclosure member are both provided with a connected receiving cavity and an injection port, and the injection port is used to inject a medium into the receiving cavity so that the first enclosure member and the second enclosure member are in an expanded state, and when in use, the first enclosure member is used to be installed at an upstream position of a tunnel defect, and the second enclosure member is used to be installed at a downstream position of a tunnel defect, and the shapes of the first enclosure member and the second enclosure member are both adapted to fit the shape of the tunnel wall; A water pipe, the water pipe is passed through the first enclosure member and the second enclosure member; A pumping device is used to pump out the accumulated water between the first enclosure member and the second enclosure member.

2. The cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel according to claim 1 is characterized in that: The first enclosure member and the second enclosure member both include a rubber bag, the rubber bag is provided with the receiving cavity and the injection port, and the injection port is provided with a one-way valve; The rubber bag is also provided with an installation through hole, and the water pipe is passed through the installation through hole.

3. The cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel according to claim 2 is characterized in that: The hole wall of the installation through hole protrudes along the direction of the hole center line to form at least two annular convex ribs, and each of the annular convex ribs abuts against the outer tube wall of the water pipe to form a sealing structure.

4. The cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel according to claim 2 is characterized in that: When gas is injected into the rubber bag through the injection port, the rubber bag is formed into an air bag, and the outer wall of the air bag can be closely attached to the tunnel wall.

5. The cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel according to claim 2, characterized in that: When liquid is injected into the rubber bag through the injection port, the rubber bag is formed into a water bag, and the outer wall of the water bag can be closely attached to the tunnel wall.

6. The cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel according to claim 2, characterized in that: The rubber bag has an arc-shaped outer wall. The first enclosure member and the second enclosure member further include an elastic plate. The elastic plate is arranged on the arc-shaped outer wall. In the unfolded state, the elastic plate is used to cling to the tunnel wall.

7. The cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel according to claim 6, characterized in that: The elastic plates are provided in plurality, and the elastic plates are arranged side by side and spaced apart along the extending direction of the arc-shaped outer wall; Alternatively, a plurality of the elastic plates are arranged side by side along the extension direction of the arc-shaped outer wall, and two adjacent elastic plates are rotatably connected via a rotating member.

8. The cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel according to claim 6 or 7, characterized in that: The cofferdam diversion device for eliminating defects at the bottom of the water diversion tunnel also includes chemical slurry, which is used to fill the gap between the elastic plate and the tunnel wall to seal the gap.

9. The cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel according to claim 1, characterized in that: The pumping equipment includes a pump and a pumping pipe. The pump is arranged in the working area surrounded by the first enclosure and the second enclosure. One end of the pumping pipe is connected to the pump, and the other end of the pumping pipe extends to the outside of the first enclosure or the second enclosure.

10. The cofferdam diversion device for eliminating defects at the bottom of a water diversion tunnel according to claim 9, characterized in that: The water pump is a submersible sewage pump.

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