CN109137827B - Underwater rapid plugging method for large hole - Google Patents
Underwater rapid plugging method for large hole Download PDFInfo
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- CN109137827B CN109137827B CN201811048045.0A CN201811048045A CN109137827B CN 109137827 B CN109137827 B CN 109137827B CN 201811048045 A CN201811048045 A CN 201811048045A CN 109137827 B CN109137827 B CN 109137827B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
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Abstract
The invention discloses a method for quickly plugging large holes underwater, which comprises the following steps of 1: determining an underwater plugging position; step 2: determining an underwater plugging construction channel and path, and setting an underwater operation platform; and step 3: calculating the length of the plugging body; and 4, step 4: building a first brick wall, and reducing the water flow speed in the hole and the scouring of the water flow to the plugging body; and 5: a flat pressing communicating pipe is arranged in the middle of the first brick wall; step 6: when the first brick wall is constructed to the required height, building a concrete precast block on the back of the first brick wall, and embedding a flat-pressing communicating pipe; and 7: filling and plugging the flat-pressing communicating pipe by building blocks, and cutting off the water flow of the hole; and 8: and building a second brick wall on the back of the concrete precast block, plastering and caulking by using special waterproof mortar after the building is finished, and building a back supporting platform on the back of the second brick wall. The method ensures the stability of the plugging body and improves the construction efficiency.
Description
Technical Field
The invention relates to the field of underwater plugging construction of large holes, in particular to an underwater rapid plugging method for large holes, which ensures that the large holes can be safely and efficiently plugged.
Background
In large-scale hydraulic and hydroelectric engineering, the large-scale hole under water overflows frequently, and the large-scale hole under water needs to be plugged after the task of overflowing is completed, so that the construction difficulty is high when plugging is performed under water. The existing underwater plugging construction has the following problems: 1. the underwater situation is complex, and when the underwater plugging position is far away from the outside, the plugging material is inconvenient to transport; 2. the plugging body has a complex structure and high construction difficulty; 3. the plugging material has high cost and high plugging construction cost; 4. the plugging is affected by water pressure, and the stability of the plugging body is difficult to ensure when the construction is too fast. Due to the problems, the underwater plugging construction difficulty is high, the construction period is long, and a large amount of manpower and material resources are consumed.
Disclosure of Invention
The invention aims to solve the technical problem of providing an underwater rapid plugging method for large holes, ensuring the stability of a plugging body and improving the construction efficiency.
In order to solve the technical problems, the invention adopts the technical scheme that:
an underwater rapid plugging method for large holes comprises the following steps:
step 1: determining an underwater plugging position according to the topographic condition and the hydrological condition of the engineering area and in combination with the arrangement type of a hydraulic building;
step 2: determining an underwater plugging construction channel and path, and setting an underwater operation platform;
and step 3: calculating the length of the plugging body according to the size, the water level difference and the plugging diameter of the hole;
and 4, step 4: building a first brick wall, and reducing the water flow speed in the hole and the scouring of the water flow to the plugging body;
and 5: a flat pressing communicating pipe is arranged in the middle of the first brick wall to ensure that the water pressure on two sides is balanced;
step 6: when the first brick wall is constructed to the required height, building a concrete precast block on the back of the first brick wall, and embedding a flat-pressing communicating pipe;
and 7: after the concrete precast block is completely constructed and reaches the expected strength, the flat-pressing communicating pipe is filled with the building blocks and plugged, and the water flow of the holes is cut off;
and 8: and building a second brick wall on the back of the concrete precast block, plastering and caulking by using professional waterproof mortar after the building is finished, and building a back supporting platform on the back of the second brick wall to finally form a plugging body sequentially consisting of the first brick wall, the concrete precast block, the second brick wall and the back supporting platform.
Further, in step 6, the concrete precast block is constructed layer by using a step method by using special waterproof mortar.
Further, the method also comprises the step 9: and after the plugging body is built, arranging a displacement meter at the tail end of the plugging body.
Further, the method also comprises the step 10: and (5) carrying out accumulated water pumping and draining.
Compared with the prior art, the invention has the beneficial effects that: 1) the plugging material related by the invention has low cost and is convenient to transport. 2) The plugging body is simple in structure and low in construction difficulty. 3) The invention adopts the brick wall combined with the concrete precast block to build the plugging body, thereby greatly improving the construction speed. 4) The invention adopts the embedded flat-pressing communicating pipe, reduces the water pressure difference and ensures the stability of the plugging body during rapid construction.
Drawings
FIG. 1 is a schematic plan view of a plugging body of the underwater rapid plugging method for large holes.
FIG. 2 is a cross-sectional view of a plugging body of the underwater rapid plugging method for large holes.
In the figure: 1-a first brick wall; 2-flat pressing communicating pipe; 3-precast concrete block; 4-a second brick wall; 5-back support platform.
Detailed Description
The underwater rapid plugging method for the large hole is further described in detail by combining the attached drawings and the specific embodiment, and the specific embodiment comprises the following steps:
firstly, determining an underwater plugging position according to the topographic condition and the hydrological condition of an engineering area and in combination with the arrangement type of a hydraulic building, and completing field construction preparation, including site cleaning, plugging material preparation, water and electricity supply and the like;
secondly, performing underwater exploration investigation: professional underwater operation personnel submerge the plugging material to perform investigation, determine an optimal underwater plugging construction channel and path, and arrange an underwater operation platform to facilitate temporary storage and transportation of plugging materials;
thirdly, before underwater plugging construction, calculating the length of a plugging body according to parameters such as the size of a hole, the water level difference and the plugging diameter;
fourthly, in order to be convenient and rapid in construction, a professional underwater operator firstly builds the first brick wall 1, the wall thickness is 48cm, the material is common sintered bricks, the engineering quantity is small, and the construction can be rapidly carried out to the design elevation, so that the water flow speed in the hole and the scouring of the water flow to the plugging body are reduced;
fifthly, a flat pressing communicating pipe 2 is arranged in the middle of the wall body of the first brick wall 1, so that water pressure balance on two sides is guaranteed, the size of the flat pressing communicating pipe 2 is determined according to specific conditions, water flows on two sides of the plugging body are communicated in the construction process, the water pressure difference on two sides is adjusted, and the stability of the plugging body in the construction process is guaranteed;
sixthly, when the first brick wall 1 is constructed to the plugging height 1/3, building a concrete precast block 3 (with a self-defined size, mainly convenient to move and capable of improving overall stability) on the back of the first brick wall 1 and embedding a flat pressing communicating pipe 2, wherein the concrete precast block 3 is built in a layered mode by adopting special waterproof mortar and a step method, so that the stability of a plugging body in the construction process is guaranteed, and the length of the plugging body is determined according to calculation;
seventhly, after the concrete precast block 3 is completely constructed and the strength is waited for 7 days, the flat pressing communicating pipe 2 is filled with the building blocks and plugged, the water flow of the holes is cut off, and the water flow in the holes is plugged;
eighthly, completing the building of the second brick wall 4 by professional underwater operators, wherein the wall thickness is 48cm, the second brick wall is made of common sintered bricks, and after the building is completed, plastering and caulking are performed by professional waterproof mortar, so that the main function of the second brick wall is to increase the anti-seepage effect of the plugging body; building a back supporting platform 5 on the back of the second brick wall 4; according to the requirements, accumulated water pumping and draining are carried out, and a displacement meter is arranged at the tail end of the plugging body for displacement monitoring.
In general, a first brick wall 1 with the thickness of 48cm is built by an underwater professional in a large hole, a flat pressing communicating pipe 2 is embedded, and the flat pressing communicating pipe 2 is embedded in a concrete precast block 3; plugging the flat pressing communicating pipe 2; then building the concrete precast block 3 and building a second brick wall 4 with the thickness of 48cm to play a role of seepage prevention; and building a back supporting platform 5 on the back to finish the plugging of the large holes.
The castration meets with the flood that exceeds standard for the avionic hub engineering, and right bank ship lock foundation pit intakes, and the flood pours into left bank power generation factory building into from right bank grout corridor, leads to the power generation factory building foundation ditch to be flooded. In order to restore the construction production of the power generation plant on the left bank as early as possible in time, the grouting gallery is blocked underwater, namely the traffic gallery communicated with the grouting gallery from the 9# machine set section of the power generation plant is blocked underwater in the submerged area of the foundation pit.
Claims (1)
1. An underwater rapid plugging method for large holes is characterized by comprising the following steps:
step 1: determining an underwater plugging position according to the topographic condition and the hydrological condition of the engineering area and in combination with the arrangement type of a hydraulic building;
step 2: determining an underwater plugging construction channel and path, and setting an underwater operation platform;
and step 3: calculating the length of the plugging body according to the size, the water level difference and the plugging diameter of the hole;
and 4, step 4: a first brick wall (1) is built, so that the water flow speed in the hole and the scouring of the water flow to the plugging body are reduced;
and 5: a flat pressing communicating pipe (2) is arranged in the middle of the first brick wall (1) to ensure that the water pressure at two sides is balanced;
step 6: when the first brick wall (1) is constructed to a required height, building a concrete precast block (3) on the back of the first brick wall (1) and embedding a flat-pressing communicating pipe (2);
and 7: after the concrete precast block (3) is completely constructed and reaches the expected strength, the flat pressing communicating pipe (2) is filled and blocked by building blocks, and the water flow of the hole is cut off;
and 8: building a second brick wall (4) on the back of the concrete precast block (3), plastering and caulking by using special waterproof mortar after building, building a back supporting platform (5) on the back of the second brick wall (4), and finally forming a plugging body consisting of the first brick wall (1), the concrete precast block (3), the second brick wall (4) and the back supporting platform (5) in sequence;
in the step 6, the concrete precast block (3) is built layer by a step method by adopting special waterproof mortar;
further comprising step 9: after the construction of the plugging body is finished, arranging a displacement meter at the tail end of the plugging body;
further comprising the step 10: and (5) carrying out accumulated water pumping and draining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811048045.0A CN109137827B (en) | 2018-09-10 | 2018-09-10 | Underwater rapid plugging method for large hole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811048045.0A CN109137827B (en) | 2018-09-10 | 2018-09-10 | Underwater rapid plugging method for large hole |
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| Publication Number | Publication Date |
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| CN109137827A CN109137827A (en) | 2019-01-04 |
| CN109137827B true CN109137827B (en) | 2021-05-28 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207537993U (en) * | 2017-10-31 | 2018-06-26 | 广东水电二局股份有限公司 | A kind of diversion tunnel concrete plug |
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- 2018-09-10 CN CN201811048045.0A patent/CN109137827B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207537993U (en) * | 2017-10-31 | 2018-06-26 | 广东水电二局股份有限公司 | A kind of diversion tunnel concrete plug |
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| CN109137827A (en) | 2019-01-04 |
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