CN216948386U - Recharge well structure for deep rock stratum - Google Patents
Recharge well structure for deep rock stratum Download PDFInfo
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- CN216948386U CN216948386U CN202220316310.4U CN202220316310U CN216948386U CN 216948386 U CN216948386 U CN 216948386U CN 202220316310 U CN202220316310 U CN 202220316310U CN 216948386 U CN216948386 U CN 216948386U
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Abstract
The utility model relates to a recharging well structure for a deep rock stratum, which comprises a recharging well pipe and a filling layer, wherein the recharging well pipe is a welded steel pipe and is respectively provided with a high section, a fixed layer well pipe section, a closed layer well pipe section, a filter pipe section and a sand setting pipe section from top to bottom; the filter screen is wrapped up to the lateral wall of filter tube section, the filling layer is including filling in the filter filling layer in the filter tube section and the sand setting pipeline section outside, in the fixed filling layer in the sealed well pipeline section outside and fixed layer well pipeline section outside, the inside back cover that fills of sand setting pipeline section. During construction, a geological drilling machine is adopted to drill a well hole with the pore-forming diameter larger than that of the recharge well pipe, then the recharge well pipe wrapped with the filter screen is placed into the well hole, then the filling layer is sequentially constructed from bottom to top outside the recharge well pipe, and finally the recharge well bottom is filled with the bottom sealing layer.
Description
Technical Field
The utility model relates to the technical field of construction for controlling foundation pit dewatering by utilizing a recharge method, in particular to a recharge well structure of a deep rock stratum.
Background
In the deep foundation pit project construction process, the underground water in the foundation pit needs to be subjected to precipitation operation for facilitating earthwork excavation, the water level outside the foundation pit correspondingly drops to a certain extent, a certain number of recharging wells need to be constructed for preventing the water level outside the foundation pit from dropping to cause ground settlement or deformation and cracking of a building, and the dynamic balance of the original water level is ensured by recharging a certain water quantity to the ground layer outside the foundation pit through the recharging wells, so that danger is avoided.
At present, the construction operation mode of the recharging well and the structural form of the recharging well in the industry are too single, a targeted structural form is not adopted for different stratum conditions, particularly, a recharging well structure suitable for deep rock strata is not provided, so that the work efficiency of the recharging well cannot be fully exerted, and therefore, the research on the recharging well structure for the deep rock strata is necessary.
Disclosure of Invention
The utility model aims to provide a recharging well structure for a deep rock stratum, which has the characteristics of simple structure, convenience and quickness in construction, high work efficiency and the like, and can effectively improve the quality and efficiency of water level recharging outside a foundation pit.
The utility model can be realized by the following technical scheme:
a recharging well structure for a deep rock stratum comprises a recharging well pipe with the diameter of 100-200 mm and a filling layer filled outside the recharging well pipe, wherein the recharging well pipe is a welded steel pipe and is respectively provided with a high section, a fixed layer well pipe section, a closed layer well pipe section, a filtering pipe section and a sand setting pipe section from top to bottom; wherein the higher section is located above the ground, and the other sections are located below the ground.
The length of the higher section is 1-2 m, the length of the fixed layer well pipe section is 1-3 m, and the outer side of the fixed layer well pipe section is filled with plain concrete with the thickness of 80-200 mm to form a fixed filling layer.
The length of the well pipe section of the sealing layer is 1-3 m, and a grout stopping bag (cement grout is filled in a plastic bag in a ratio of 0.5: 1) with the thickness of 80-200 mm is filled outside the well pipe section of the sealing layer to form a sealing filling layer.
The length of the filter pipe section is at least 10m, filter holes are formed in the pipe wall at intervals, the distance between the filter holes at the uppermost end and the lower end of the filter pipe section and the end of the filter pipe section is 0.3-1 m, the filter screen is wrapped on the outer side wall of the filter pipe section, the length of the sand settling pipe section is 1-2 m, gravel or gravel with the thickness of 80-200 mm is filled outside the filter pipe section and the sand settling pipe section to form a filter filling layer, and the bottom of the recharging well is that the sand settling pipe section is filled with the sand with the thickness of at least 1m to form a bottom sealing layer.
The optimization scheme comprises the following steps: the outer side wall of the sand setting pipe section is also wrapped with a filter screen.
During construction, a geological drilling machine is used for drilling a borehole with the pore-forming diameter larger than that of a recharge well pipe, the recharge well pipe wrapped with a filter screen is placed into the borehole from top to bottom, the bottom end of the recharge well pipe is abutted against the bottom of the borehole, then a filtering filling layer, a sealing filling layer and a fixed filling layer are sequentially filled into a gap between the recharge well pipe and the borehole wall of the borehole from bottom to top, finally a sealing bottom layer is filled into the recharge well bottom, namely the inside of a sand settling pipe section, and the completed recharge well is higher than the ground.
The utility model has the characteristics of simple structure, convenient construction, high work efficiency and the like, and can effectively improve the quality and the efficiency of water level recharging outside the foundation pit.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The utility model is further illustrated by the following specific examples.
Example 1
Referring to fig. 1, a recharge well structure for deep rock formations comprises a recharge well pipe 1 having a diameter of 140mm and a filling layer filled outside the recharge well pipe 1.
The recharge well pipe 1 is a welded steel pipe and is respectively provided with a high-out section 11, a fixed layer well pipe section 12, a closed layer well pipe section 13, a filter pipe section 14 and a sand setting pipe section 15 from top to bottom; wherein the elevated section 11 is located above ground and the remaining sections are located below ground.
The length of the higher section 11 is 1m, the length of the fixed-layer well pipe section 12 is 2m, and the fixed-layer filling layer 4 is formed by filling C15 plain concrete with the thickness of 120mm on the outer side of the fixed-layer well pipe section 12.
The length of the well pipe section 13 of the sealing layer is 2m, and a grout stopping bag (the plastic bag is filled with cement grout in a ratio of 0.5: 1) with the thickness of 120mm is filled outside the well pipe section to form a sealing filling layer 5.
The length of the filter pipe section 14 is 20m, the filter holes 10 with the diameter of 10mm are arranged on the pipe wall at intervals, the filter hole 10 at the uppermost end of the filter pipe section is 0.5m away from the upper end of the filter pipe section 14, the filter hole 10 at the lowermost end of the filter pipe section is 0.3m away from the lower end of the filter pipe section 14, and the filter screen 3 is wrapped on the outer side wall of the filter pipe section 14.
The length of the sand setting pipe section 15 is 1.5m, gravel with the thickness of 120mm is filled outside the filter pipe section 14 and the sand setting pipe section 15 to form a filter filling layer 6, the outer side wall of the sand setting pipe section 15 of the embodiment is also wrapped with the filter screen 3, and the bottom recharging well, namely the inner part of the sand setting pipe section 15, is filled with sand with the thickness of 1m to form a bottom sealing layer 7.
During construction, a geological drilling machine is used for drilling a well hole with the pore-forming diameter of 380mm and the depth of 25.5m, the recharge well pipe 1 wrapped with the filter screen 3 is placed into the well hole from top to bottom, the bottom end of the recharge well pipe 1 is abutted to the bottom of the well hole, then the filtration filling layer 6, the closed filling layer 5 and the fixed filling layer 4 are sequentially filled into a gap between the recharge well pipe 1 and the well hole wall 2 of the well hole from bottom to top, finally the bottom sealing layer 7 is filled into the recharge well bottom, namely the inside of the sand settling pipe section 15, and the completed recharge well is 1m above the ground (as shown in figure 1).
The construction site practice proves that the utility model has much better recharging effect and high work efficiency in deep and thick rock strata compared with the recharging well structure of a single filter pipe externally-wrapped filter screen structure type in the market.
Claims (2)
1. The utility model provides a recharge well structure for deep stratum, is 100 ~ 200 mm's recharge well pipe (1) and packs in the filling layer in recharge well pipe (1) outside including the diameter, its characterized in that:
the recharge well pipe (1) is a welded steel pipe and is respectively provided with a high-out section (11), a fixed layer well pipe section (12), a closed layer well pipe section (13), a filter pipe section (14) and a sand setting pipe section (15) from top to bottom; wherein the higher section (11) is positioned above the ground, and the other sections are positioned below the ground;
the length of the higher section (11) is 1-2 m;
the length of the fixed layer well pipe section (12) is 1-3 m, and plain concrete with the thickness of 80-200 mm is filled outside the fixed layer well pipe section to form a fixed filling layer (4);
the length of the well pipe section (13) of the closed layer is 1-3 m, and a grout stopping bag with the thickness of 80-200 mm is filled outside the well pipe section to form a closed filling layer (5);
the length of the filter pipe section (14) is at least 10m, filter holes (10) are arranged on the pipe wall at intervals, the distance between the uppermost filter hole (10) and the upper end of the filter pipe section (14) is 0.3-1 m, the distance between the uppermost filter hole and the lower end of the filter pipe section (14) is 0.3-1 m, and the filter screen (3) is wrapped on the outer side wall of the filter pipe section (14);
the length of the sand settling pipe section (15) is 1-2 m, and gravel or gravel with the thickness of 80-200 mm is filled outside the filter pipe section (14) and the sand settling pipe section (15) to form a filter filling layer (6);
the bottom of the recharging well, namely the inner part of the sand settling pipe section (15), is filled with settled sand with the thickness of at least 1m to form a bottom sealing layer (7).
2. A recharge well structure for deep rock formations according to claim 1, characterized in that: the outer side wall of the sand setting pipe section (15) is also wrapped with a filter screen (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220316310.4U CN216948386U (en) | 2022-02-16 | 2022-02-16 | Recharge well structure for deep rock stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220316310.4U CN216948386U (en) | 2022-02-16 | 2022-02-16 | Recharge well structure for deep rock stratum |
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| Publication Number | Publication Date |
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| CN216948386U true CN216948386U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220316310.4U Active CN216948386U (en) | 2022-02-16 | 2022-02-16 | Recharge well structure for deep rock stratum |
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| CN (1) | CN216948386U (en) |
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2022
- 2022-02-16 CN CN202220316310.4U patent/CN216948386U/en active Active
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