CN217480219U

CN217480219U - Multi-purpose pumping well structure in multilayer groundwater system

Info

Publication number: CN217480219U
Application number: CN202121203021.5U
Authority: CN
Inventors: 徐丹; 徐杨青; 赵洪峰; 张婧雯; 江强强; 汪子琦; 薛璟
Original assignee: Wuhan Design and Research Institute of China Coal Technology and Engineering Group
Current assignee: Wuhan Design and Research Institute of China Coal Technology and Engineering Group
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-09-23
Anticipated expiration: 2031-05-28

Abstract

The utility model provides a multi-purpose pumped well structure among multilayer groundwater system, this structure can the layer control draw water, including the well structure of layering, separate in backfill and the well outside the well. The water level measuring device is characterized in that a plurality of sections of filter pipes are distributed and arranged according to aquifers, filter materials and water stopping materials are filled in layers, the upper aquifer and the lower aquifer are separated by a water stopping air bag in a well pipe, and meanwhile, a piezometer pipe is arranged to measure the water level while reducing water. The utility model has the advantages that: this structure can make things convenient for the layering control precipitation to compromise and survey the water level, thereby realize that a well is multi-purpose, save work load convenient construction, save the cost, especially narrow in the construction site, the very suitable in the engineering of precipitation complicacy.

Description

Multi-purpose pumping well structure in multilayer groundwater system

Technical Field

The utility model relates to a foundation ditch engineering field especially relates to a multi-purpose pumped well structure among multilayer groundwater system.

Background

At present, precipitation wells are arranged for single-layer aquifers, and when the multilayer aquifers are involved, the precipitation wells are required to be arranged in layers, for example, the wells 1 aim at the aquifers 1, and the wells 2 aim at the aquifers 2, so that the construction is influenced due to the fact that the number of the precipitation wells in a foundation pit is large; if the multilayer aquifers are combined and considered, the lower aquifer is formed to excessively drop, or the lower aquifer supplies the upper layer, so that the difficulty of upper layer precipitation is increased.

Disclosure of Invention

In order to solve the problem, the utility model provides a multi-purpose pumped well structure among multilayer groundwater system can realize that a well is multi-purpose in multilayer groundwater system, and this multi-purpose pumped well is placed in the well bore, and this structure includes: the device comprises a well pipe, a filter pipe, a settling pipe, a filter material, a water stopping material, a pressure measuring component, a grouting pipe, a water stopping component I and a water stopping component II; the filter tube comprises a first filter tube and a second filter tube, the filter material comprises a first filter material and a second filter material, and the water-stopping material comprises a first water-stopping material and a second water-stopping material; the bottom end of the well pipe is provided with a sedimentation pipe, the top end of the sedimentation pipe is provided with a first filter pipe, the upper half part of the well pipe is also provided with a second filter pipe, a first water stopping component and a second water stopping component are arranged between the first filter pipe and the second filter pipe, the first water stopping component is fixed on the second water stopping component, a filter material and a water stopping material are backfilled between the well pipe wall and the well hole wall, a pressure measuring component and a grouting pipe are arranged between the well pipe wall and the well hole wall, the bottom end of the pressure measuring component is located in the first filter material, and the bottom end of the grouting pipe is located in the first water stopping material.

Further, the pressure measuring component is a pressure measuring pipe or a pore pressure meter.

Further, the piezometric tube is cylindrical.

Further, the lower end of the grouting pipe is provided with a hole.

Furthermore, the water stopping component is a water tank.

Furthermore, the water stopping component II is a water stopping air bag.

And further, a first filter material, a first water stop material, a second filter material and a second water stop material are sequentially backfilled between the wall of the well pipe and the wall of the well hole from bottom to top.

Further, with the excavation of the foundation pit, after the second filter pipe is completely exposed, the second filter pipe is cut, and a replacement well pipe is welded at the position.

The utility model provides a beneficial effect that technical scheme brought is: this structure can make things convenient for layered control precipitation to realize that a well is multi-purpose, utilize a well multi-purpose, reduce into well quantity, save work load convenient construction, thereby reduce the cost, it is narrow especially to be under construction at the field, very be suitable for in the engineering that precipitation is complicated, and compromise and survey the water level, can actually move the water level at monitoring precipitation well, in order to do benefit to accurate control precipitation as required.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic diagram of a multi-purpose pumping well structure in a multi-layer groundwater system in an embodiment of the present invention at each stage, where fig. 1 is the multi-purpose pumping well structure at a first stage, fig. 2 is the multi-purpose pumping well structure at a second stage, and fig. 3 is the multi-purpose pumping well structure at a third stage.

Fig. 2 is a cross-sectional view corresponding to fig. 1 in the embodiment of the present invention, that is, fig. 1 ', 2 ', and 3 ' are the cross-sectional views of fig. 1(1), (2), and (3), respectively.

The reference numerals in the drawings are illustrated below:

in the figure, 1, a well pipe, 2, a filter pipe, 21, a first filter pipe, 22, a second filter pipe, 3, a settling pipe, 4, a filter material, 41, a first filter material, 42, a second filter material, 5, a water stop material, 51, a first water stop material, 52, a second water stop material, 6, a pressure measuring pipe, 7, a grouting pipe, 8, a water stop tank, 9, a water stop air bag and 10 replace the well pipe.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiment of the utility model provides a multi-purpose pumped well structure among multilayer groundwater system, the well sets up the multisection filter tube according to aquifer distribution, and filter material 4 and stagnant water material 5 are backfilled to well week layering. A piezometer tube 6 is embedded in the backfill filter material, a grouting tube 7 is embedded in the water stopping material 5, and a water stopping air bag 9 fixed by a water stopping groove 8 is arranged in the well pipe 1. During construction, a hole is formed, a well structure is arranged according to the depth of a water-bearing layer at the lower part, filter pipes 2 are arranged in a well pipe 1 in a layered mode, then layered backfilling is carried out, water-stopping materials are backfilled at the position of a water-resisting layer between two water-bearing layers, and the water-stopping effect is enhanced through grouting. The water-stopping air bag is arranged in the well pipe to separate the underground water in the lower aquifer.

Referring to fig. 1-2, fig. 1 is a schematic diagram of a multi-purpose pumping well structure in a multi-layer groundwater system at various stages according to an embodiment of the present invention, and fig. 2 is a cross-sectional view corresponding to fig. 1 in an embodiment of the present invention, that is, fig. 1 ', 2 ', and 3 ' in fig. 2 are transverse cross-sectional views of fig. 1(1), 2), and 3, respectively, and the multi-purpose pumping well structure specifically includes: the device comprises a well pipe 1, a filter pipe 2, a settling pipe 3, a filter material 4, a water stop material 5, a pressure measuring pipe 6, a grouting pipe 7, a water stop tank 8 and a water stop air bag 9; the filter tube 2 comprises a first filter tube 21 and a second filter tube 22, the filter material 4 comprises a first filter material 41 and a second filter material 42, and the water-stopping material 5 comprises a first water-stopping material 51 and a second water-stopping material 52; the bottom end of a well pipe 1 is provided with a sedimentation pipe 3, the top end of the sedimentation pipe 3 is provided with a first filter pipe 21, the upper half part of the well pipe 1 is also provided with a second filter pipe 22, a water stop groove 8 and a water stop air bag 9 are arranged between the first filter pipe 21 and the second filter pipe 22, the water stop groove 8 fixes the water stop air bag 9, a filter material 4 and a water stop material 5 are backfilled between the well pipe wall and the well hole wall, the filter material 41, a water stop material 51, a filter material two 42 and a water stop material two 52 are backfilled from bottom to top in sequence, the top end of the water stop material one 51 and the bottom end of the second filter pipe 22 are on the same horizontal plane, the top end of the first filter pipe 21 is lower than the bottom end of the first filter material 41, a pressure measuring pipe 6 and a grouting pipe 7 are arranged between the well pipe wall and the well hole wall, the bottom end of the pressure measuring pipe 6 is located in the filter material one 41, and the bottom end of the grouting pipe 7 is located in the water stop material one 51. A buried pressure measuring pipe 6 is reserved in the backfill filter material I41, the pressure measuring pipe 6 connected with the aquifer in a layered mode can accurately measure the water level in the operation process of the pumping well, and errors caused by well loss and dynamic head fluctuation are avoided. The embedded grouting pipe 7 is reserved in the backfill water stopping material I51, the backfill material is further solidified into a dense chamber by pumping water for a period of time, the water stopping effect can be further enhanced by grouting the water stopping material I51 through the reserved grouting pipe 7, and water gushing from a well wall caused by poor water stopping is avoided. A water stopping air bag 9 is fixed in the well pipe 1 through a water stopping groove 8, the water stopping air bag 9 is located at the backfilling position of a water stopping material 51, the inside and the outside of the well pipe 1 are uniformly isolated from a water-bearing stratum, the upper water-bearing stratum and the lower water-bearing stratum are separated through an inflatable seal, the air bag is broken according to the excavation working condition requirements, and the lower layer is started to pump water. The length of the filter pipe 2 and the backfilled filter material 4 is not suitable to exceed the distribution range of the aquifer.

In the figure 1(1), according to the conventional well-forming process, a hole is formed, a well pipe 1 is placed in a hole cleaning mode, a first filter material 41 and a first water stop material 51 are backfilled in a segmented mode, a pressure measuring pipe 6 and a grouting pipe 7 are placed at a preset depth, and then a second filter material 42 and a second water stop material 52 are backfilled in sequence. And (5) completing well flushing, and finally arranging a water stopping air bag 9 at the position of the water stopping groove 8. The water-stopping air bag 9 is sealed and fixed after being inflated. Adopt expandable stagnant water gasbag 9 and hold stagnant water groove 8 of stagnant water gasbag 9 and cooperate, and the stagnant water operation can be accomplished under water, extrude stagnant water gasbag 9 laminating well pipe wall through stagnant water groove 8, can realize the stagnant water. At this time, the water level in the well pipe 1 is displayed as the measured water level H1 of the aquifer 1, the piezometer pipe 6 is displayed as the measured water level H2 of the aquifer 1, and H1> H2 under natural conditions. In the figure 1(2), a water pump is arranged above the water-stopping air bag 9 for pumping water, the water level of H1 continuously drops, and H2 is kept unchanged. And after pumping water for a period of time, reinforcing the first water stopping material 51 by using the grouting pipe 7.

In fig. 1(3), as the excavation of the foundation pit progresses, the aquifer 1 is gradually drained after the second filter pipe 22 on the upper part of the well pipe is completely exposed, and H2 is gradually larger than H1. And cutting the second filter pipe 22 and welding the replacement well pipe 10 to break the water-stopping air bag 9. The water is pumped out because most or all of the upper aquifer is excavated and the water is pumped out for a longer period of time, the water level will be significantly lower than the lower aquifer water level, and the lower aquifer water level H2 is finally displayed in the well pipe 1. And pumping water to the second aquifer, and continuously lowering the H2 water level until the water level required by safe excavation is met. In the process, the water level of the lower aquifer is monitored in real time by using the piezometer tube 6 so as to control precipitation according to requirements by actually measuring the water level.

The utility model has the advantages that: this structure can make things convenient for layering control precipitation to realize that a well is multi-purpose, utilize a well is multi-purpose, reduce into well quantity, save work load convenient construction, thereby reduce the cost, especially narrow in the field construction, very be suitable for in the engineering that precipitation is complicated, and compromise and survey the water level, can be at the actual water level that moves of monitoring precipitation well, in order to do benefit to accurate control precipitation as required.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a multi-purpose pumped well structure among multilayer groundwater system, this multi-purpose pumped well is placed in the borehole, its characterized in that: the structure includes: the device comprises a well pipe (1), a filter pipe (2), a settling pipe (3), a filter material (4), a water stopping material (5), a pressure measuring component, a grouting pipe (7), a water stopping component I and a water stopping component II; the filter tube (2) comprises a first filter tube (21) and a second filter tube (22), the filter material (4) comprises a first filter material (41) and a second filter material (42), and the water-stopping material (5) comprises a first water-stopping material (51) and a second water-stopping material (52); well casing (1) bottom sets up precipitation pipe (3), precipitation pipe (3) top sets up filter tube one (21), well casing (1) first half still sets up filter tube two (22), set up stagnant water part one and stagnant water part two between filter tube one (21) and filter tube two (22), stagnant water part two is fixed to stagnant water part one, backfill filter material (4) and stagnant water material (5) between well casing wall and the well pore wall, and set up pressure measurement part and slip casting pipe (7) between well casing wall and well pore wall, the bottom of pressure measurement part is located filter material one (41), the bottom of slip casting pipe (7) is located stagnant water material one (51).

2. A multipurpose pumping well structure in a multi-story groundwater system as claimed in claim 1, wherein: the pressure measuring component is a pressure measuring pipe (6) or a pore pressure meter.

3. A multipurpose pumping well structure in a multi-story groundwater system as claimed in claim 2, wherein: the piezometer tube (6) is cylindrical.

4. A multipurpose pumping well structure in a multiple groundwater system as claimed in claim 1, wherein: the lower end of the grouting pipe (7) is provided with a hole.

5. A multipurpose pumping well structure in a multi-story groundwater system as claimed in claim 1, wherein: the water stopping component is a water stopping tank (8).

6. A multipurpose pumping well structure in a multi-story groundwater system as claimed in claim 1, wherein: the second water stop component is a water stopping air bag (9).

7. A multipurpose pumping well structure in a multi-story groundwater system as claimed in claim 1, wherein: and a first filter material (41), a first water stop material (51), a second filter material (42) and a second water stop material (52) are sequentially filled between the wall of the well pipe and the wall of the well pipe from bottom to top.