Foundation pit tube well dewatering first well sealing structure

Abstract

The utility model relates to a foundation pit tube well dewatering first well sealing structure which comprises a well pipe and a raft plate structure, a plurality of water filtering holes are formed in the inner wall of the well pipe, a filtering layer is laid at the bottom of the well pipe, a water pumping pipe is arranged on the well pipe, the top of the water pumping pipe extends out of the well pipe, a water stopping ring is arranged on the water pumping pipe, and a foundation cushion layer is arranged on the top of the well pipe. The raft structure is arranged on a foundation bed, the end, extending into the well pipe, of the water pumping pipe is provided with a filtering part, and the extending end of the water pumping pipe is provided with a plug. After water pumping is finished, a plugging piece used for plugging the water pumping pipe is arranged in the water pumping pipe. The underground water plugging quality can be ensured, the water seepage risk caused by post well plugging is avoided, meanwhile, the foundation construction speed can be increased, and the phenomenon that plugging measures are taken after foundation construction is completed, and manpower and material resources are wasted is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a foundation pit pipe well dewatering and pre-sealing well structure. Background Art

[0002] Nowadays, with the development of urban construction, construction foundation pit projects continue to extend underground. When constructing the underground part, it is necessary to excavate the foundation pit. In order to avoid water accumulation in the foundation pit, it is necessary to open a precipitation well in the foundation pit. During the construction period, the groundwater under the foundation pit continues to be extracted to keep the groundwater level at a low level. After the construction in the foundation pit is completed, the precipitation well needs to be sealed. The sealing of foundation pit precipitation has gradually become a major problem.

[0003] For some projects with tight construction schedules, a foundation pit pipe well dewatering and well sealing structure and construction method are urgently needed to improve the speed and quality of foundation pit dewatering and sealing, shorten the construction period, and reduce construction costs. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a foundation pit pipe well dewatering and pre-sealing well structure.

[0005] The utility model provides a foundation pit pipe well dewatering and pre-sealing well structure adopts the following technical solutions:

[0006] A foundation pit pipe well dewatering and well sealing structure comprises a well pipe and a raft structure, the inner wall of the well pipe having a plurality of water filtering holes, a filter layer being laid on the well pipe, a pumping pipe being arranged on the well pipe, the filter layer wrapping the outer contour of the pumping pipe, the top of the pumping pipe extending from the well pipe, a water stop ring being arranged on the pumping pipe, a foundation cushion layer being arranged on the top of the well pipe, the raft structure being arranged on the foundation cushion layer, and after the pumping is completed, a plugging piece for sealing the pumping pipe is arranged in the pumping pipe.

[0007] Optionally, the raft structure includes a raft foundation formed by pouring concrete and raft steel bars embedded in the top and bottom of the raft foundation.

[0008] Optionally, the end of the water pumping pipe extending into the well pipe has a filter portion.

[0009] Optionally, a plug is provided at the protruding end of the water pumping pipe.

[0010] Optionally, the well pipe is provided with a fixed layer around the pumping pipe.

[0011] Optionally, a sealing paste is applied at the junction between the fixing layer and the water pumping pipe.

[0012] Optionally, a waterproof layer is provided between the raft structure and the foundation cushion layer.

[0013] Optionally, the fixing layer is poured slightly expansive concrete.

[0014] In summary, the utility model includes at least one of the following beneficial technical effects: it can effectively ensure the quality of groundwater plugging, avoid the risk of water seepage caused by post-well sealing, and speed up the foundation construction speed, avoiding the phenomenon of wasting manpower and material resources by taking plugging measures after the foundation construction is completed. Finally, the risk of water seepage caused by pipe well dewatering and well sealing is solved, saving construction time. At the same time, the device can be made on-site at the construction site, with good reinforcement effect, reducing labor input, thereby reducing project cost investment and ensuring construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0017] Explanation of the reference numerals: 1. Well pipe; 2. Filter layer; 3. Filter part; 4. Fixing layer; 5. Sealing paste; 6. Foundation cushion layer; 7. Waterproof layer; 8. Water-stop ring; 9. Raft reinforcement; 10. Pumping pipe; 11. Leakage plugging part; 12. Plug; 13. Raft foundation. DETAILED DESCRIPTION

[0018] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0019] The following is combined with Figure 1 The utility model is described in further detail.

[0020] The utility model embodiment discloses a foundation pit pipe well dewatering and pre-sealing well structure.

[0021] Reference Figure 1A foundation pit pipe well dewatering and well sealing structure comprises a well pipe 1 and a raft structure. The inner wall of the well pipe 1 has a plurality of water filtering holes. A filter layer 2 is laid on the well pipe 1. A pumping pipe 10 is arranged on the well pipe 1. The top of the pumping pipe 10 extends out from the well pipe 1. The filter layer 2 wraps the outer contour of the pumping pipe 10. A water stop ring 8 is arranged on the pumping pipe 10. A foundation cushion layer 6 is arranged on the top of the well pipe 1. The raft structure is arranged on the foundation cushion layer 6. The end of the pumping pipe 10 extending into the well pipe 1 has a filter part 3, and the protruding end of the pumping pipe 10 is provided with a plug 12. After the pumping is completed, a plugging part 11 for sealing the pumping pipe 10 is arranged in the pumping pipe 10, which can ensure the quality of groundwater sealing and avoid the risk of water seepage caused by the subsequent well sealing. At the same time, it can speed up the foundation construction speed and avoid the phenomenon of wasting manpower and material resources by taking sealing measures after the foundation construction is completed.

[0022] In this embodiment, the well pipe 1 adopts a sandless well pipe 1, and a plurality of water filtering holes are opened at the bottom of the sandless well pipe 1 to prevent earth collapse. The water filtering holes can effectively filter groundwater.

[0023] In this embodiment, the filter layer 2 is laid gravel, and the filter layer 2 covers the end of the pumping pipe 10 located in the well pipe 1, filters the groundwater for a second time, and stabilizes the pumping pipe 10.

[0024] In this embodiment, the pumping pipe 10 is made of waste φ50 steel pipe, which can be obtained locally at the construction site, and the threading machine, welding machine, and the plug 12 and filter 3 purchased in conjunction with the pumping pipe 10 are used to make the device easy and fast to process, and the effect is good. The filter 3 uses a filter screen to filter water to prevent the loss of sand, mud, soil, etc. when the water pump is pumping water, and to prevent the water pump from being blocked. The plug 12 is threadedly connected to the pumping pipe 10, which can be connected firmly and well sealed.

[0025] The raft structure comprises a raft foundation 13 formed by pouring concrete and raft reinforcement bars 9 pre-buried at the top and bottom of the raft foundation 13. Finally, the raft concrete is poured to completely seal the groundwater and improve the waterproof effect.

[0026] The well pipe 1 is located in the circumference of the pumping pipe 10 and is provided with a fixing layer 4 above the filter layer 2. Specifically, the fixing layer 4 is poured micro-expansion concrete, which fills the inside of the well pipe tightly to prevent groundwater from seeping upward.

[0027] The junction of the fixed layer 4 and the pumping pipe 10 is smeared with a sealing paste 5. The sealing paste 5 is a sealing paste, which effectively seals the gap between the steel pipe and the expansion concrete and is smeared into an R angle.

[0028] The plugging member 11 is watertight. Before pouring concrete, pumping is stopped and watertight is added into the pumping pipe 10 to seal the inside of the pumping pipe 10, thereby effectively blocking groundwater.

[0029] Micro-expansive concrete, sealing paste, water-tight materials and other materials can effectively play a sealing role.

[0030] A waterproof layer 7 is arranged between the raft structure and the foundation cushion layer 6. Waterproofing is constructed on the cushion layer to improve the waterproof effect. The waterproof layer 7 can be made of waterproof coiled material.

[0031] The specific construction steps are as follows: 1. After the foundation pit is excavated, the well pipe 1 is sunk; 2. A layer of crushed stone is laid at the bottom of the well pipe 1; 3. A pumping pipe 10 with a filter part 3 is placed, and crushed stone of a certain height is filled around to form a filter layer 2; 4. A water pump pumps water out of the pumping pipe 10; 5. Micro-expansive concrete is poured around the pumping pipe 10 to the bottom of the cushion layer to form a fixed layer 4, and sealing paste is applied to the junction of the micro-expansive concrete and the steel pipe; 6. After the waterproof construction of the cushion layer is completed, a water stop ring 8 is welded on the wall of the pumping pipe 10; 7. When the raft slab steel bars 9 are tied and before pouring concrete, precipitation is stopped, and water is immediately added to the pumping pipe 10 to prevent leakage; 8. A plug 12 is covered on the pumping pipe 10, and raft slab concrete is poured to form a raft slab structure.

[0032] The utility model solves the risk of water seepage caused by pipe well dewatering and sealing, improves the speed and quality of foundation pit dewatering and sealing, shortens the construction period, and reduces construction costs.

[0033] The utility model can improve the speed and quality of foundation pit dewatering and plugging, shorten the construction period, and reduce the construction cost. Especially for some projects with tight construction period and some groundwater with low pressure, the method of sealing the well first can ensure the quality of groundwater plugging and avoid the risk of water seepage caused by sealing the well later. At the same time, it can speed up the foundation construction speed and avoid the phenomenon of wasting manpower and material resources by taking plugging measures after the foundation construction is completed.

[0034] The utility model ensures the quality of groundwater plugging, avoids the risk of water seepage caused by post-well sealing, and speeds up the foundation construction speed, avoiding the phenomenon of wasting manpower and material resources by taking plugging measures after the foundation construction is completed, and finally solves the risk of water seepage caused by pipe well dewatering and well sealing, saving construction time. At the same time, the device can be made on-site with local materials at the construction site, with good reinforcement effect, reducing labor input, thereby reducing project cost investment and ensuring construction quality.

[0035] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make some improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A foundation pit pipe well dewatering and first sealing well structure, characterized by: It includes a well pipe and a raft structure, the inner wall of the well pipe has a plurality of water filtering holes, a filter layer is laid on the well pipe, a pumping pipe is arranged on the well pipe, the filter layer wraps the outer contour of the pumping pipe, the top of the pumping pipe extends out from the well pipe, a water stop ring is arranged on the pumping pipe, a foundation cushion layer is arranged on the top of the well pipe, the raft structure is arranged on the foundation cushion layer, and after the pumping is completed, a plugging piece for sealing the pumping pipe is arranged in the pumping pipe.

2. The foundation pit pipe well dewatering and pre-sealing well structure according to claim 1 is characterized by: The raft structure comprises a raft foundation formed by pouring concrete and raft steel bars pre-embedded at the top and bottom of the raft foundation.

3. The foundation pit pipe well dewatering and pre-sealing well structure according to claim 1 is characterized by: The end of the water pumping pipe extending into the well pipe is provided with a filtering part.

4. The foundation pit pipe well dewatering and pre-sealing well structure according to claim 3 is characterized by: The extended end of the water pumping pipe is provided with a plug.

5. The foundation pit pipe well dewatering and pre-sealing well structure according to claim 3 is characterized by: The well pipe is provided with a fixing layer in the circumference of the water pumping pipe.

6. The foundation pit pipe well dewatering and pre-sealing well structure according to claim 5 is characterized by: The junction between the fixing layer and the water pumping pipe is coated with sealing paste.

7. The foundation pit pipe well dewatering and pre-sealing well structure according to claim 2 is characterized by: A waterproof layer is arranged between the raft structure and the foundation cushion layer.

8. The foundation pit pipe well dewatering and pre-sealing well structure according to claim 5 is characterized by: The fixing layer is poured micro-expansive concrete.

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