CN110144918A - Construction method of anti-seepage and plugging of underground building dewatering well - Google Patents

Abstract

The invention discloses an anti-seepage and plugging construction method for underground building dewatering wells, comprising the following specific steps: 1) determining the plugging location: determining the plugging location and cleaning the periphery of the plugging location; 2) processing partitions and pipelines: making and Install partitions and pipes; 3) Rigid material plugging layer plugging: pour rigid plugging material on the upper part of the partition; 4) Grouting material plugging layer plugging: pour grouting material on the lower part of the partition; 5) Pipeline grouting : Grouting the pipeline; 6) Plugging and post-treatment of the pipeline: Plugging the pipeline, cutting the redundant pipeline, and painting the protective layer; effectively solving the problem of long-term water seepage after blocking the dewatering well, with fast plugging speed, after plugging There will be no water seepage, and it will also reinforce the surrounding soil.

Description

Construction method of anti-seepage and plugging of underground building dewatering well

technical field

The invention relates to the technical field of waterproof plugging and reinforcement of underground buildings, in particular to a construction method for seepage prevention and plugging of underground building dewatering wells.

Background technique

The basement refers to the height of the room floor below the outdoor ground level exceeding half of the clear height of the room. Multi-storey and high-rise buildings need a deep foundation. In order to utilize this height, a basement is built under the bottom of the building, which can increase the usable area and save the backfilling of the house core, which is relatively economical. Building a basement below the ground floor of a house can improve the efficiency of building land use. Some high-rise building bases are deeply buried, and making full use of this depth to build basements has good economic and use effects. According to the function, the basement has ordinary basement and empty basement; according to the structural material, there are brick wall structure and concrete structure basement; according to the structural form, there are full basement and semi-basement.

The dewatering well is used in the construction environment with relatively high groundwater level. It is an important technical measure in the construction of earthwork, foundation and foundation engineering. It can drain the water in the foundation soil, promote the consolidation of the soil, and improve the strength of the foundation. It can reduce the lateral displacement and settlement of the slope soil, stabilize the slope, eliminate quicksand, reduce the uplift of the base soil, so that the foundation and foundation engineering construction below the natural groundwater can avoid the influence of groundwater, provide relatively dry construction conditions, and It can reduce the amount of earthwork, shorten the construction period, improve the quality of the project and ensure the safety of construction.

The construction technology of existing underground building dewatering well plugging technology is mainly divided into following two kinds:

1. After the dewatering well is pumped and dewatered, concrete is immediately poured into it for forced sealing.

2. Pour gravel into the dewatering well, and then pour concrete to seal it.

However, the prior art has the following problems:

1. The blocking time is too long.

2. The concrete and the soil cannot be tightly combined, and changes in temperature and settlement can easily cause displacement and water seepage.

3. It has been blocked for a long time, and there is water seepage at the edge. The post-treatment construction of water seepage is complicated, difficult and expensive.

Contents of the invention

The purpose of the present invention is to provide an anti-seepage and plugging construction method for underground building dewatering wells, which can effectively solve the problem of long-term water seepage after the dewatering well is blocked. effect.

The present invention is realized through the following technical solutions: the construction method for anti-seepage and plugging of underground building dewatering wells, comprising the following specific steps:

1) Determine the blockage site: determine the blockage site and clean up the surrounding areas of the blockage site;

2) Partition and pipeline treatment: make and install partitions and pipes;

3) Rigid material plugging layer plugging: pour rigid plugging material on the upper part of the partition;

4) Grouting material plugging layer plugging: grouting material is poured into the lower part of the partition;

5) Pipe grouting: grouting the pipes;

6) Pipeline plugging and post-processing: plugging the pipeline, cutting excess pipes, and painting the protective layer.

Further, in order to better realize the present invention, the following setting method is adopted in particular: the step 1) is specifically: remove sanding, peeling and warping defects on the surface of the base layer around the dewatering well, and clean up dust and oil stains.

Further, in order to better realize the present invention, the following setting method is adopted in particular: the step 2) includes the following specific steps:

2.1) Fabrication and installation of partitions and pipes:

According to the design and manufacture of the partition plate according to the diameter of the precipitation well, two pipes are also designed and manufactured, one is a short pipe and the other is a long pipe;

2.2) Put in the clapboard and pipe:

According to the design height, mark the pipes, connect and check each section, put them into the dewatering well, set the partition at 2m from the head of the dewatering well, and weld the partition and the pipe together.

Further, in order to better realize the present invention, the following arrangement is particularly adopted: the bottom end of the short tube is located above the partition or in contact with the upper part of the partition.

Further, in order to better realize the present invention, the following setting method is adopted in particular: the bottom end of the long pipe is placed at the bottom of the dewatering well at 0.2-0.5m.

Further, in order to better realize the present invention, the following setting method is adopted in particular: the step 3) is specifically: the super-fast polymer emergency repair mortar and the water-blocking grout that does not disperse in contact with water are adjusted according to the ratio of 0.9 to 1.1: 0.45 to 0.55 The ratio is mixed and stirred evenly, poured into the upper part of the partition, and densely filled to the head of the dewatering well. After curing, check whether it meets the requirements, and then enter the next process.

Further, in order to better realize the present invention, the following setting method is particularly adopted: the step 4) is specifically: the special cement, water glass, latex, micro-expansion agent, and foamed concrete are mixed according to the ratio of 0.8~1.2: 0.9~1.2 : 0.04~0.06: 0.01~0.03: 0.03~0.05 The ratio is mixed and stirred evenly, poured from the long pipe until the slurry flows out of the short pipe.

Further, in order to better realize the present invention, the following setting method is adopted in particular: the step 5) is specifically:

After the grout flows out of the short pipe, turn the short pipe into a grouting pipe, connect the grouting machine, grout the long pipe and the short pipe at the same time, and control the pressure (the preferred control pressure is 1.5~2.0MPa), so that the grout squeezes the surrounding soil , closely combined with the soil to form a whole, and cannot exceed the structural bearing capacity.

Further, in order to better realize the present invention, the following setting method is adopted in particular: the step 6) includes the following specific steps:

6.1) Plugging grouting pipes:

After the grouting is completed, close the grouting valve and seal the pipe opening;

6.2) Cut the pipe and paint the protective layer

After curing reaches the required strength and observes that there is no water seepage, cut the pipe and apply a protective layer of rubber paint on the surface of the cut.

Further, in order to better realize the present invention, the following setting method is specially adopted: before the step 1), the construction preparation step is also included: the construction plan is compiled in a targeted manner, and it is completed after review and approval; detailed technical disclosure, material stacking, Labor preparation and tool preparation must meet the requirements.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The present invention effectively solves the problem of long-term water seepage after blocking the dewatering well, has the advantages of fast blocking speed, no water seepage after sealing, and has the effect of reinforcing the surrounding soil.

(2) The anti-seepage and plugging structure of the dewatering well obtained by the construction of the present invention can effectively combine the anti-seepage and sealing structure of the dewatering well with the soil body, avoiding the occurrence of displacement when there is a change in temperature or settlement, Further, water seepage can be avoided.

(3) The anti-seepage and plugging structure of the dewatering well formed by the present invention has a better effect on the reinforcement of the soil around the building than the dewatering well formed by the traditional process, and the effect of stabilizing the surrounding foundation is better.

Description of drawings

Fig. 1 is a schematic diagram of the anti-seepage and plugging structure of the dewatering well according to the present invention.

Fig. 2 is a cross-sectional view of the anti-seepage and plugging structure of the dewatering well according to the present invention.

Among them, 1-dewatering well, 2-drainage pipe, 3-grouting pipe, 4-rigid material sealing layer, 5-partition plate, 6-grouting material sealing layer.

Detailed ways

The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is some embodiments of the present invention, but not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It is worth noting that: in this application, when certain known technologies or conventional technical means need to be applied to this field, the applicant may have not specifically stated in the text what kind of known technology or/and conventional technical means are. However, it cannot be considered that the application does not comply with the third paragraph of Article 26 of the Patent Law because the technical means are not specifically disclosed in the text.

Example 1:

The invention designs an anti-seepage and plugging construction method for underground building dewatering wells, which effectively solves the long-term water seepage problem after the dewatering well is blocked, has the advantages of fast sealing speed, no water seepage after sealing, and has the effect of reinforcing the surrounding soil. In particular, the following setting method is adopted: including the following specific steps:

1) Determine the blockage site: determine the blockage site and clean up the surrounding areas of the blockage site;

2) Partition and pipeline treatment: make and install partitions and pipes;

3) Rigid material plugging layer plugging: pour rigid plugging material on the upper part of the partition;

4) Grouting material plugging layer plugging: grouting material is poured into the lower part of the partition;

5) Pipe grouting: grouting the pipes;

6) Pipeline plugging and post-processing: plugging the pipeline, cutting excess pipes, and painting the protective layer.

Example 2:

This embodiment is further optimized on the basis of the above-mentioned embodiment, and the place where the same technical solution is used in the previous embodiment will not be repeated, as shown in Figure 1 and Figure 2, further to better realize the present invention, especially adopt The following setting method: the step 1) is specifically: remove sanding, peeling and warping defects on the surface of the base layer around the dewatering well 1, and clean up the dust and oil.

Example 3:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the place where the same technical solution is adopted in the previous embodiment will not be repeated, as shown in Figure 1 and Figure 2, further to better realize the present invention, In particular, the following setting method is adopted: the step 2) includes the following specific steps:

2.1) Fabrication and installation of partitions 5 and pipes:

According to the well diameter of the dewatering well, the dividing plate 5 is designed and manufactured, and two pipelines are also designed and manufactured, one is a short pipe, and the other is a long pipe; as a preferred setting scheme, the size of the dividing plate 5 is designed according to the well diameter of the dewatering well 1, and the length of the pipeline is According to the design of the depth of the dewatering well 1, a short pipe is a drainage pipe (the preferred length is designed from the position of entering the well to the position of the partition, pipe diameter: 32mm) 2, and a long pipe is a grouting pipe (combined by fasteners, Its length: the position of entering the well is 0.2-0.5m high from the bottom of the well, preferably set at a height of 300mm from the bottom of the well, pipe diameter: 32mm) 3; preferably, the partition 5 is made of a steel plate of 4-6mm.

2.2) Put in the clapboard and pipe:

According to the design height, mark the pipes, connect and check each section, put it into the dewatering well 1, set the partition 5 at 2m from the wellhead of the dewatering well, and weld the partition and the pipe together ; After putting it into the designated position, fix it and check it. After the inspection is completed, proceed to the next process.

Example 4:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the place where the same technical solution is adopted in the previous embodiment will not be repeated, as shown in Figure 1 and Figure 2, further to better realize the present invention, In particular, the following arrangement is adopted: the bottom end of the short pipe (drainage pipe 2 ) is located above the partition 5 or in contact with the upper part of the partition 5 .

Example 5:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the place where the same technical solution is adopted in the previous embodiment will not be repeated, as shown in Figure 1 and Figure 2, further to better realize the present invention, In particular, the following setting method is adopted: the bottom end of the long pipe (grouting pipe 3 ) is placed at the bottom of the dewatering well at 0.2-0.5 m, preferably, the bottom end of the grouting pipe 3 is 300 mm away from the bottom of the dewatering well 1 .

Embodiment 6:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the place where the same technical solution is adopted in the previous embodiment will not be repeated, as shown in Figure 1 and Figure 2, further to better realize the present invention, In particular, the following setting method is adopted: the step 3) is specifically: mix and stir the express polymer emergency repair mortar and the non-dispersible water plugging grout according to the ratio of 0.9~1.1:0.45~0.55, and pour them into the partition The upper part shall be densely filled to the head of the dewatering well. After solidification, check whether it meets the requirements, and if it is satisfied, enter the next process;

As a preferred design scheme, the rigid material is obtained by mixing and stirring the express-type polymer emergency repair mortar and the non-dispersible water blocking grout according to the ratio of 1:0.5, pouring it into the upper part of the partition 5, and paying attention to the dense filling , there should be no cavities, and it should be filled to the wellhead to form a rigid material plugging layer 4; when the solidification reaches the required strength (preferably above 80%), proceed to the next process.

Embodiment 7:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the place where the same technical solution is adopted in the previous embodiment will not be repeated, as shown in Figure 1 and Figure 2, further to better realize the present invention, In particular, the following setting method is adopted: the step 4) is specifically as follows: special cement (such as water-indispersible cement), water glass, latex, micro-expansion agent, and foamed concrete are divided into 0.8~1.2: 0.9~1.2: 0.04~0.06: 0.01~0.03: 0.03~0.05 The ratio is mixed and stirred evenly, and poured from the long pipe until the short pipe flows out of the slurry; during the pouring process, because the grouting material is heavier than water, it will sink to the bottom, and the water will The drainage hole in the middle and upper part is removed, so it needs to wait until the slurry flows out of the drain pipe 2; as a preferred design scheme, special cement (such as water non-dispersible cement), water glass, latex, micro-expansion agent, and foamed concrete press 1 : 0.9: 0.05: 0.02: 0.05 ratio mixing and stirring.

Embodiment 8:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the place where the same technical solution is adopted in the previous embodiment will not be repeated, as shown in Figure 1 and Figure 2, further to better realize the present invention, In particular, the following setting method is adopted: the step 5) is specifically:

After the short pipe (drainage pipe 2) flows out the grout, change the short pipe (drainage pipe 2) into a grouting pipe, connect the grouting machine, and grout the long pipe (grouting pipe 3) and the short pipe (drainage pipe 2) at the same time, and control it well The pressure (the preferred control pressure is 1.5~2.0MPa) makes the grout squeeze the surrounding soil and combine closely with the soil to form a whole, which cannot exceed the structural bearing capacity.

Embodiment 9:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the place where the same technical solution is adopted in the previous embodiment will not be repeated, as shown in Figure 1 and Figure 2, further to better realize the present invention, In particular, the following setting method is adopted: the step 6) includes the following specific steps:

6.1) Plugging grouting pipes:

After the grouting is completed, close the grouting valve and seal the pipe opening (the pipe opening of the drain pipe 2 and the grouting pipe 3);

6.2) Cut the pipe and paint the protective layer

After the curing reaches the required strength and no water seepage is observed, cut the pipe (cutting the drainage pipe 2 and the grouting pipe 3 flush with the top of the dewatering well 1), and paint a protective layer of rubber paint on the surface of the cut.

Example 10:

This embodiment is further optimized on the basis of any of the above-mentioned embodiments, and the place where the same technical solution is adopted in the previous embodiment will not be repeated, as shown in Figure 1 and Figure 2, further to better realize the present invention, In particular, the following setting method is adopted: before the above step 1), there is also a construction preparation step: targeted preparation of the construction plan (this construction plan varies according to the requirements of each project, and the examiner should not disclose it without specific disclosure during the review) The construction plan, but it is considered that the disclosure of the invention is not sufficient), and has been reviewed and approved for completion; detailed technical disclosure, material stacking, labor preparation, and tool preparation must meet the requirements.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications and equivalent changes made to the above embodiments according to the technical essence of the present invention all fall within the scope of the present invention. within the scope of protection.

Claims (10)

1. The anti-seepage and plugging construction method of underground building dewatering wells is characterized in that: it comprises the following specific steps: 1) Determine the blockage site: determine the blockage site and clean up the surrounding areas of the blockage site; 2) Partition and pipeline treatment: make and install partitions and pipes; 3) Rigid material plugging layer plugging: pour rigid plugging material on the upper part of the partition; 4) Grouting material plugging layer plugging: grouting material is poured into the lower part of the partition; 5) Pipe grouting: grouting the pipes; 6) Pipeline plugging and post-processing: plugging the pipeline, cutting excess pipes, and painting the protective layer. 2. The anti-seepage and plugging construction method for underground building dewatering wells according to claim 1, characterized in that: said step 1) is specifically: remove sanding, peeling and warping defects on the surface of the base layer around the dewatering well, and place Dust and oil stains are removed. 3. The anti-seepage and plugging construction method for underground building dewatering wells according to claim 1 or 2, characterized in that: said step 2) includes the following specific steps: 2.1) Fabrication and installation of partitions and pipes: According to the design and manufacture of the partition plate according to the diameter of the precipitation well, two pipes are also designed and manufactured, one is a short pipe and the other is a long pipe; 2.2) Put in the clapboard and pipe: According to the design height, mark the pipes, connect and check each section, put them into the dewatering well, set the partition at 2m from the head of the dewatering well, and weld the partition and the pipe together. 4. The anti-seepage and plugging construction method for underground building dewatering wells according to claim 3, characterized in that: the bottom end of the short pipe is located above the partition or in contact with the upper part of the partition. 5. The anti-seepage and plugging construction method for underground building dewatering wells according to claim 3, characterized in that: the bottom end of the long pipe is placed at 0.2-0.5m from the bottom of the dewatering well. 6. The anti-seepage and plugging construction method for underground building dewatering wells according to claim 3, characterized in that: said step 3) is specifically: injecting express polymer emergency repair mortar and non-dispersible water plugging grout according to The ratio of 0.9~1.1:0.45~0.55 is mixed and stirred evenly, poured into the upper part of the partition, and densely filled to the head of the dewatering well. After curing, check whether it meets the requirements, and then enter the next process. 7. The anti-seepage and plugging construction method for underground building dewatering wells according to claim 3, characterized in that: said step 4) is specifically: special cement, water glass, latex, micro-expansive agent, and foamed concrete are pressed The ratio of 0.8~1.2: 0.9~1.2: 0.04~0.06: 0.01~0.03: 0.03~0.05 is mixed and stirred evenly, poured from the long pipe until the slurry flows out of the short pipe. 8. The anti-seepage and plugging construction method for underground building dewatering wells according to claim 7, characterized in that: the step 5) is specifically: After the grout flows out of the short pipe, turn the short pipe into a grouting pipe, connect the grouting machine, grout the long pipe and the short pipe at the same time, and control the pressure so that the grout squeezes the surrounding soil and tightly combines with the soil to form a whole. Structural bearing capacity. 9. According to any one of claims 1-2, 4-8, the anti-seepage and plugging construction method of underground building dewatering wells is characterized in that: the step 6) includes the following specific steps: 6.1) Plugging grouting pipes: After the grouting is completed, close the grouting valve and seal the pipe opening; 6.2) Cut the pipe and paint the protective layer After curing reaches the required strength and observes that there is no water seepage, cut the pipe and apply a protective layer of rubber paint on the surface of the cut. 10. According to any one of claims 1-2, 4-8, the anti-seepage and plugging construction method for underground building dewatering wells is characterized in that: before the step 1), it also includes a construction preparation step: targeted preparation and construction The plan has been reviewed and approved to be completed; detailed technical disclosure, material stacking, labor preparation, and tool preparation must meet the requirements.