Submersible dewatering well under alluvial plain geological condition

Abstract

The utility model discloses a diving precipitation well under alluvial plain geological conditions, which comprises a precipitation well and a well casing, the well casing is positioned in the precipitation well and comprises an expansion part and a rigid part, the expansion part is welded with the rigid part, and the expansion part is welded with the rigid part. The joint of the expansion part and the rigid part is wrapped by at least two layers of filter screens, bamboo chips are clamped outside the filter screens, and then the bamboo chips are bundled at the joint of the expansion part and the rigid part through lead wires. The well pipe is formed by welding the corrugated pipe and the steel pipe, the impact strength of the well pipe is improved, the well pipe is not prone to being damaged, the bamboo chips mainly have the effects of absorbing water and clamping the filter screen when the bamboo chips enter the dewatering well initially, the filter screen is prevented from being separated from the joint of the corrugated pipe and the steel pipe, and the service life of the well pipe is prolonged. And the condition that silt and sludge are squeezed into the joint to block the tube well is better avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of precipitation well construction, in particular to a submerged precipitation well under the geological conditions of an alluvial plain. Background Art

[0002] A dewatering well refers to a small well used to drain water from mine tunnels or mining areas. Usually, during mining, there is an underground tunnel drainage system that can be used to guide water from the mining area or tunnels along the ditch into dewatering wells at certain intervals, and then flow into the water tank through the underground tunnels connected to the dewatering wells, and then be discharged to the ground through a special drainage well by a water pump, or directly flow out of the ground through the drainage tunnel.

[0003] The geological conditions of the alluvial plain are that the upper soil is silt and silty clay, the middle layer is sand and gravel sand, and the lower layer is sedimentary rock. Since the alluvial plain is adjacent to the river, the underground groundwater level is relatively high. In the construction of the foundation and foundation of the building project, it is necessary to lower the underground groundwater level to the sand and gravel sand layers, keep the foundation pit dry, prevent the foundation and foundation from being soaked by groundwater, and the poured basement floor is uplifted by groundwater pressure to ensure the quality and safety of the foundation and foundation construction. In order to ensure that the sand content of the pumped water is less than the specified value when the group wells are dewatered, the structure of the dewatering wells needs to be improved. Utility Model Content

[0004] The utility model provides a submerged precipitation well under the geological conditions of an alluvial plain, which can effectively solve the above problems.

[0005] The utility model is achieved in this way:

[0006] A submerged drainage well under alluvial plain geological conditions, comprising:

[0007] precipitation wells;

[0008] A well pipe, the well pipe is located in the precipitation well, the well pipe includes an expansion part and a rigid part, the expansion part and the rigid part are welded, and the joint between the expansion part and the rigid part is covered by at least two layers of filter screens, bamboo strips are sandwiched outside the filter screen, and the bamboo strips are then tied to the joint between the expansion part and the rigid part by lead wire.

[0009] As a further improvement, the outer wall of the well pipe is covered with a 10-mesh steel wire mesh, and the steel wire mesh is covered with at least 3 layers of 40-mesh nylon mesh.

[0010] As a further improvement, a plurality of drainage holes are regularly distributed on the outer wall of the well pipe.

[0011] As a further improvement, the diameter of the drainage hole is 16mm-20mm, and the penetration depth is 50-55mm.

[0012] As a further improvement, a water pump is placed inside the well pipe, and the water pump is connected to a water collection well on the ground through a water pump water pipe.

[0013] As a further improvement, the distance between the water pump and the bottom of the precipitation well is 0.8-1.2m.

[0014] As a further improvement, the length of the well pipe is 4-6m shorter than the depth of the precipitation well.

[0015] As a further improvement, at least two layers of filter screens are provided at the bottom of the well pipe.

[0016] The beneficial effects of the utility model are as follows: by arranging two layers of filter screens at the bottom of the well pipe for covering, it is ensured that the sand content of the pumped water is lower than the specified value; and then, by first covering the outside of the well pipe with a steel mesh and then covering it with a nylon mesh for a second time, the well pipe can meet the filtering effect while enhancing the overall rigidity of the well pipe; finally, by arranging the well pipe to be formed by welding a corrugated pipe and a steel pipe, the impact resistance of the well pipe is improved, and the well pipe can be made less likely to be damaged; and the bamboo strips mainly play the role of absorbing water and clamping the filter screen when first entering the precipitation well, so as to prevent the filter screen from detaching from the joint of the corrugated pipe and the steel pipe, and better avoid It avoids the situation that mud and silt are squeezed into the joints and cause blockage of the pipe well. Secondly, when bamboo pieces enter the precipitation well for a long time, they will rot due to being soaked in water for a long time. The bamboo fibers produced after the bamboo pieces are rotten will fit the filter net, and the bamboo fibers themselves have certain anti-odor and filtering effects. Therefore, the bamboo fibers formed by the decay of the bamboo pieces mainly play a primary filtering effect. Moreover, the long-term filtration of the filter net will cause a certain reduction in the filtering effect of the filter net. Therefore, the primary filtration of the bamboo fiber and the secondary filtration of the filter net can better avoid the situation that mud and silt are squeezed into the joints and cause blockage of the pipe well. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of a submerged precipitation well under alluvial plain geological conditions of the utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the medium well pipe;

[0020] Reference numerals:

[0021] 1- precipitation well, 2-well pipe, 201-corrugated pipe, 202-steel pipe, 203-steel wire mesh, 204-nylon mesh, 205-drain hole, 206-filter screen, 207-bamboo sheet, 208-lead wire, 3-water pump pipe, 4-water pump. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0023] In the description of the present invention, the terms "upper", "lower", "above", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] Reference Figure 1-2 As shown, this embodiment provides a submerged precipitation well under alluvial plain geological conditions, including:

[0025] Precipitation well 1;

[0026] A well pipe 2, wherein the well pipe 2 is located in the precipitation well 1, and the well pipe 2 includes an expansion part and a rigid part, wherein the expansion part and the rigid part are welded, and the joint between the expansion part and the rigid part is covered by at least two layers of filter screens 206, and the filter screen 206 is sandwiched with bamboo pieces 207, and the bamboo pieces 207 are further tied to the joint between the expansion part and the rigid part by lead wires 208, and the outer wall of the well pipe 2 is covered with a 10-mesh steel wire mesh 203, and the steel wire mesh 203 is covered with at least 3 layers of 40-mesh nylon mesh 204, and a plurality of drainage holes 205 are regularly distributed on the outer wall of the well pipe 2, and at least two layers of filter screens 206 are arranged at the bottom of the well pipe 2.

[0027] By first coating the outside of the well pipe 2 with a steel mesh 203 and then coating it with a nylon mesh 204 for a second time, it is achieved that the well pipe 2 can meet the filtering effect while enhancing the overall rigidity of the well pipe 2. Finally, by setting the well pipe 2 to be formed by welding a corrugated pipe 201 and a steel pipe 202, the impact resistance of the well pipe 2 is improved, and the well pipe 2 can be made less likely to be damaged. It can also make the well pipe 2 more stable under the geological conditions of the alluvial plain and less likely to collapse. Secondly, by arranging two layers of filter screens 206 at the bottom of the well pipe 2 for coating, it is ensured that the sand content of the pumped water is lower than the specified value.

[0028] In this embodiment, by using two layers of filter screen 206 to cover and sandwich bamboo pieces 207 at the joint of the corrugated pipe 201 and the steel pipe 202, it is possible to avoid the situation where mud and silt are squeezed into the joint and then block the pipe well; secondly, the bamboo pieces 207 mainly play the role of absorbing water and clamping the filter screen 206 when they first enter the precipitation well 1, so as to avoid the filter screen 206 from detaching from the joint of the corrugated pipe 201 and the steel pipe 202, and better avoid the situation where mud and silt are squeezed into the joint and then block the pipe well; secondly, when the bamboo pieces 207 enter the precipitation well 1 for a long time, the bamboo pieces 20 7 In the case of decay due to long-term soaking in water, the bamboo fiber produced after the bamboo piece 207 decays will fit the filter 206, and since the bamboo fiber itself has certain anti-odor and filtering effects, the bamboo fiber formed by the decay of the bamboo piece 207 mainly plays a primary filtering effect, and since the long-term filtering of the filter 206 will cause the filtering effect of the filter 206 to be reduced to a certain extent, the primary filtering of the bamboo fiber is combined with the secondary filtering of the filter 206, so as to better avoid the situation where mud and silt are squeezed into the joint and then block the pipe well.

[0029] Furthermore, the diameter of the drainage hole 205 is 16 mm-20 mm, and the penetration depth thereof is 50-55 mm.

[0030] In this embodiment, the diameter of the drainage hole 205 on the outer wall of the well pipe 2 is 18 mm, and the penetration depth is 52 mm. Setting the diameter of the drainage hole 205 to 18 mm allows impurities inside the well pipe 2 to be discharged through the drainage hole 205, thereby reducing the sand content of the drainage water.

[0031] Furthermore, a water pump 4 is placed inside the well pipe 2, and the water pump 4 is connected to the water collection well on the ground through the water pump water pipe 3. The distance between the water pump 4 and the bottom of the precipitation well 1 is 0.8-1.2m.

[0032] In this embodiment, the distance between the water pump 4 and the bottom of the precipitation well 1 is 1 m. This arrangement can prevent the water pump 4 from pumping out a large amount of sand and gravel deposited at the bottom of the precipitation well 1, thereby better reducing the problem of sand content in drainage.

[0033] Furthermore, the length of the well pipe 2 is 4-6 m shorter than the depth of the precipitation well 1 .

[0034] In this embodiment, the length of the well pipe 2 is 5m shorter than the depth of the precipitation well 1, that is, the bottom of the well pipe 2 is 4m-4.5m away from the bottom of the precipitation well 1. This arrangement can avoid direct contact between the well pipe 2 and the precipitation well 1, thereby preventing impurities in the precipitation well 1 from entering the well pipe 2, thereby causing blockage of the well pipe 2.

[0035] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A submerged drainage well under alluvial plain geological conditions, characterized in that: include: precipitation wells; A well pipe, the well pipe is located in the precipitation well, the well pipe includes an expansion part and a rigid part, the expansion part and the rigid part are welded, and the joint between the expansion part and the rigid part is covered by at least two layers of filter screens, bamboo strips are sandwiched outside the filter screen, and the bamboo strips are then tied to the joint between the expansion part and the rigid part by lead wire.

2. The submerged drainage well under alluvial plain geological conditions according to claim 1, characterized in that: The outer wall of the well pipe is covered with a 10-mesh steel wire mesh, and the steel wire mesh is covered with at least 3 layers of 40-mesh nylon mesh.

3. The submerged drainage well under alluvial plain geological conditions according to claim 1, characterized in that: A plurality of drainage holes are regularly distributed on the outer wall of the well pipe.

4. The submerged drainage well under alluvial plain geological conditions according to claim 3, characterized in that: The diameter of the drainage hole is 16mm-20mm, and the penetration depth is 50-55mm.

5. The submerged drainage well under alluvial plain geological conditions according to claim 1, characterized in that: A water pump is placed inside the well pipe, and the water pump is connected to a water collection well on the ground through a water pump water pipe.

6. The submerged drainage well under alluvial plain geological conditions according to claim 5, characterized in that: The distance between the water pump and the bottom of the precipitation well is 0.8-1.2m.

7. The submerged drainage well under alluvial plain geological conditions according to claim 1, characterized in that: The length of the well pipe is 4-6m shorter than the depth of the precipitation well.

8. The submerged drainage well under alluvial plain geological conditions according to claim 1, characterized in that: At least two layers of filter screens are arranged at the bottom of the well pipe.

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