CN115075276A - Foundation pit underground water collection structure and foundation pit bottom sealing construction method - Google Patents
Foundation pit underground water collection structure and foundation pit bottom sealing construction method Download PDFInfo
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- CN115075276A CN115075276A CN202210774758.5A CN202210774758A CN115075276A CN 115075276 A CN115075276 A CN 115075276A CN 202210774758 A CN202210774758 A CN 202210774758A CN 115075276 A CN115075276 A CN 115075276A
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- well
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- foundation pit
- drain pipe
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
Abstract
The invention provides a foundation pit underground water collecting structure, which comprises a blind ditch, a dewatering well and a drain pipe, wherein the blind ditch and the dewatering well are mutually communicated, the drain pipe is used for draining underground water in the blind ditch to the dewatering well, the dewatering well is internally provided with a strainer and also comprises a permeable filling filter material filled in the blind ditch, the drain pipe is embedded in the filling filter material, the filling filter material is filled between the water outlet of the drain pipe and the water filter pipe, a plurality of rows of water seepage holes which are arranged in a surrounding way are arranged on the drain pipe, two adjacent rows of water seepage holes are alternately arranged along the axial direction of the drain pipe, the technical scheme can realize filtration of the underground water flowing into the precipitation well from the drainage pipe, reduce foreign matters and impurities brought into the precipitation well, reduce the influence of the foreign matters and impurities on extraction and discharge, and improve the extraction quality and efficiency.
Description
Technical Field
The invention relates to the field of foundation pit drainage, in particular to a foundation pit underground water collection structure and a foundation pit bottom sealing construction method.
Background
In the process of foundation pit construction, a blind ditch and a dewatering well are arranged at the bottom of the foundation pit, the blind ditch extends transversely, the coverage range of the blind ditch in the horizontal direction is enlarged, more underground water enters the blind ditch, the blind ditch is communicated with the dewatering well, the underground water entering the blind ditch enters the dewatering well under the drainage of the blind ditch to be stored so as to be pumped and discharged.
The drainage mode of present french drain does, sets up the drain pipe in the french drain, and this drain pipe is called blind ditch pipe again, and its side is equipped with a plurality of infiltration holes to supply groundwater infiltration, the straight-through precipitation well of tip of drain pipe, groundwater and foreign matter impurity in the french drain get into the inside of drain pipe from the side of drain pipe, and groundwater flows towards the precipitation well along the inner wall of drain pipe, and drive in foreign matter impurity gets into the precipitation well, lead to the groundwater foreign matter impurity in the precipitation well more, are unfavorable for the extraction and discharge.
Disclosure of Invention
The invention aims to provide a foundation pit underground water collecting structure and a foundation pit bottom sealing construction method, which can be used for filtering underground water flowing into a precipitation well from a drainage pipe, reducing foreign matters and impurities brought into the precipitation well, reducing the influence of the foreign matters and impurities on extraction and drainage and improving the extraction quality and efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a foundation ditch groundwater collects structure, includes mutual french drain and precipitation well that communicate, is arranged in the drain pipe of groundwater drainage to precipitation well in the french drain, be equipped with the strainer in the precipitation well, still including the filler material of the water-permeable of packing in the french drain, the drain pipe is buried underground in the filler material, it has to fill between the delivery port of drain pipe and the strainer the filler material, be equipped with a plurality of rows on the drain pipe and encircle the infiltration hole of arranging, adjacent two rows the infiltration hole is arranged along the axial of drain pipe in turn.
Further setting: the drain pipe extends downwards towards the dewatering well.
Further setting: the blind ditch is obliquely arranged and is parallel to the drain pipe.
Further setting: the blind ditch further comprises an interlayer for preventing underground water from overflowing into the foundation pit, and the interlayer covers the upper side of the blind ditch.
Further setting: the interlayer comprises a protective layer, a waterproof layer and a concrete cushion layer which are sequentially arranged, and the blind ditch is positioned on the lower side of the concrete cushion layer.
Further setting: the dewatering well is internally provided with a well pipe communicated with the upper end of the strainer, the upper end surface of the well pipe is not lower than the upper surface of the interlayer, and the interlayer is arranged on the outer side of the well pipe in a surrounding mode to fix the well pipe.
Further setting: the diameter of the dewatering well is larger than that of the strainer.
Further setting: the filling filter material is filled between the dewatering well and the strainer.
Further setting: and the outer walls of the drain pipe and the strainer pipe are sleeved with a filter screen.
The invention also provides a foundation pit bottom sealing construction method, which comprises the following steps:
removing the interlayer and pouring a bottom plate at the bottom of the foundation pit, wherein the bottom of the bottom plate seals the blind ditch and is fixedly connected with the side wall of the well pipe;
draining the underground water in the filter pipe, and filling the filter pipe with concrete in batches until the distance between the upper surface and the bottom of the poured concrete is a preset distance;
placing a cover plate in the well pipe and compacting concrete, wherein the cover plate is fixed on the inner wall of the well pipe;
and pouring cement mortar into the well pipe for filling, and sealing the well mouth of the dewatering well.
Compared with the prior art, the scheme of the invention has the following advantages:
1. in the foundation pit groundwater collection structure related by the invention, a blind ditch is filled with a filling filter material, a drain pipe is arranged in the filling filter material in a whole burying way, groundwater continuously swells and permeates into the blind ditch at the lower side of the foundation pit, the groundwater in the blind ditch firstly permeates into the filling filter material and then enters into the drain pipe from the side surface of the drain pipe, the filling filter material preliminarily filters the groundwater entering into the drain pipe, the groundwater flowing out from the side surface of the drain pipe flows towards a water outlet along the inner wall of the drain pipe due to the fact that the resistance of the groundwater flowing out from the side surface of the drain pipe is relatively larger than the resistance of the groundwater flowing towards the water outlet along the inner wall of the drain pipe, the groundwater flowing into the drain pipe flows towards the water outlet of the drain pipe, the groundwater flowing out from the water outlet of the drain pipe enters into a precipitation well after being filtered by the filling filter material, the groundwater in the precipitation well enters into the inner side of the filter pipe from the side surface of the filter pipe, and the purpose of reducing the groundwater content by extracting from the inner side of the filter pipe is achieved, in the process of collecting and flowing the underground water, the underground water flowing into the dewatering well from the drainage pipe is filtered, foreign matters and impurities are reduced to be brought into the dewatering well, the influence of the foreign matters and impurities on the extraction and discharge is reduced, and the extraction quality and efficiency are improved.
2. In the foundation pit underground water collecting structure, the drain pipes are obliquely arranged, so that gravity acts on the underground water in the drain pipes in the axial direction of the drain pipes, power is provided for the underground water to automatically flow along the axial direction of the drain pipes, and the drainage speed and quality are improved.
3. In the foundation pit underground water collecting structure, the blind ditch is inclined and parallel to the drain pipe, so that the shortest distance between the bottom of the blind ditch and the bottom of the drain pipe is equal everywhere, namely the thickness of the filling filter material filled between the bottom of the blind ditch and the drain pipe is the same, the poor primary filtering effect of local positions is avoided, and the influence on the overall filtering effect is prevented.
4. In the foundation pit groundwater collection structure, the interlayer is laid at the bottom of the foundation pit, groundwater cannot be discharged easily and overflows to the upper side of the drain pipe, and the groundwater is reversely pressed into the drain pipe under the action of the interlayer, so that the groundwater is prevented from permeating into the foundation pit, and the foundation pit structure is prevented from being influenced.
5. In the foundation pit groundwater collection structure, the inner wall of the precipitation well has water permeability and can be infiltrated by groundwater, groundwater directly infiltrated from the side wall of the precipitation well is filtered by the filling filter material between the precipitation well and the water filter pipe and enters the inner side of the water filter pipe, foreign matters and impurities are prevented from being brought into the inner sides of the precipitation well and the water filter pipe, the way of groundwater collection is increased, and the efficiency of groundwater collection is improved.
6. According to the foundation pit bottom sealing construction method, the interlayer only plays an auxiliary effect of temporary use, so that the interlayer is firstly removed, the influence on the structure and normal construction steps of a foundation pit is avoided, the bottom is poured after the interlayer is removed, the blind ditch is sealed, the underground water in the precipitation well is discharged after the bottom plate is condensed, the precipitation well is sealed in a graded pouring mode, after the precipitation well is poured to a preset height, the cover plate is placed in the well pipe to compact concrete, meanwhile, the cover plate is connected with the inner wall of the well pipe to improve the sealing quality, finally, cement mortar is poured into the well pipe to seal the upper side of the cover plate, the well mouth of the precipitation well is level with the upper surface of the bottom plate, the construction operation of sealing the bottom of the foundation pit is completed, the influence of the blind ditch and the precipitation well on the structure and normal construction steps of the foundation pit is avoided, and support is provided for subsequent high-quality construction.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic cross-sectional view of a blind trench of a foundation pit groundwater collection system in an embodiment of the invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 according to the present invention;
FIG. 3 is a schematic view of the communication between the blind ditch and the dewatering well of the foundation pit groundwater collection system according to an embodiment of the invention;
FIG. 4 is a flow chart of a foundation pit bottom sealing construction method in an embodiment of the invention;
fig. 5 is a schematic structural diagram of the foundation pit after being bottomed in an embodiment of the invention.
Reference numerals: 10. an interlayer; 101. a protective layer; 102. a waterproof layer; 103. a concrete cushion layer; 20. blind ditches; 30. filling a filter material; 40. a drain pipe; 401. a water seepage hole; 50. a filter screen; 60. dewatering wells; 601. a water filter pipe; 602. a well pipe; 603. a settling tube; 70. a base plate; 80. cement mortar; 90. a cover plate; 100. a first concrete; 110. and a second concrete.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As shown in fig. 1-3, the present invention provides a foundation pit groundwater collection structure, which includes a blind ditch 20 and a precipitation well 60 that are mutually communicated, a drain pipe 40 for draining groundwater in the blind ditch 20 to the precipitation well 60, a strainer 601 arranged in the precipitation well 60, and a permeable filler 30 filled in the blind ditch 20, wherein the drain pipe 40 is embedded in the filler 30, the filler 30 is filled between a water outlet of the drain pipe 40 and the strainer 601, a plurality of rows of water seepage holes 401 arranged in a surrounding manner are arranged on the drain pipe 40, and two adjacent rows of the water seepage holes 401 are alternately arranged along an axial direction of the drain pipe 40.
The implementation principle is that the blind ditch 20 is filled with the filling filter material 30, the drain pipe 40 is arranged in the filling filter material 30 in a whole burying way, the groundwater continuously rises at the lower side of the foundation pit and permeates into the blind ditch 20, the groundwater in the blind ditch 20 firstly permeates into the filling filter material 30 and then enters the drain pipe 40 from the seepage hole 401 on the side surface of the drain pipe 40, the filling filter material 30 primarily filters the groundwater entering the drain pipe 40, because the resistance of the groundwater flowing out from the side surface of the drain pipe 40 is relatively larger than the resistance of the groundwater flowing to the water outlet along the inner wall of the drain pipe 40, the groundwater entering the drain pipe 40 flows in the direction with small resistance, namely flows to the water outlet of the drain pipe 40, the groundwater flowing out from the water outlet of the drain pipe 40 is filtered by the filling filter material 30 and then enters the dewatering well 60, the groundwater in the dewatering well 60 enters the inner side of the dewatering pipe 601 from the side surface of the dewatering pipe 601, the purpose of reducing the content of the groundwater is achieved by pumping the groundwater inside the strainer 601, and in the process of collecting and flowing the groundwater, the groundwater flowing into the precipitation well 60 from the drain pipe 40 is filtered, so that foreign matters and impurities are prevented from being brought into the precipitation well 60, the influence of the foreign matters and impurities on pumping and discharging is reduced, and the pumping quality and efficiency are improved.
The arrangement mode of the water seepage holes 401 enables the water drainage pipe 40 to increase the water inflow of the water drainage pipe 40 on the side surface under the condition that the strength of the water drainage pipe 40 is not influenced, and the drainage effect is improved.
The strainer 601 is the common use part in this field, and the side of strainer 601 is equipped with the hole of permeating water that a plurality of encircleed the arrangement, and the hole of permeating water filters the great foreign matter impurity of volume through the size of self diameter, makes the impurity foreign matter reduction of the inboard groundwater of strainer 601, and the inboard groundwater of extraction strainer 601 is discharged, and the effect is better.
In a particular application, the drain pipe 40 extends downwardly towards the dewatering well 60.
The drain pipe 40 is obliquely arranged, so that the gravity acts on the underground water in the drain pipe 40 in the axial direction of the drain pipe 40, power is provided for the underground water to automatically flow along the axial direction of the drain pipe 40, and the drainage speed and quality are improved.
Preferably, the blind ditch 20 is arranged obliquely and parallel to the drain pipe 40.
The blind ditch 20 inclines and is parallel with the drain pipe 40, makes the shortest interval between the bottom of blind ditch 20 and the bottom of drain pipe 40 equal everywhere, and the packing filter material 30 that fills between the bottom of blind ditch 20 and drain pipe 40 is the same promptly, avoids the preliminary filter effect of local position relatively poor, prevents to influence holistic filter effect.
Still preferably, the upper end surface of the drainpipe 601 is disposed higher than the drain pipe 40.
The upper end surface of the strainer 601 is higher than the drain pipe 40, the extending direction of the water outlet of the drain pipe 40 is opposite to the side wall of the strainer 601, all the groundwater discharged from the water outlet of the drain pipe 40 enters the inner side of the strainer 601 from the side wall of the strainer 601, and the side wall of the strainer 601 filters the groundwater further.
In a further improvement, the underground water-retaining blind ditch further comprises an interlayer 10 for blocking the underground water from entering the foundation ditch, and the interlayer 10 is covered right above the blind ditch 20.
The interlayer 10 is laid at the bottom of the foundation pit, covers the blind ditch 20 directly above, underground water is not ready to be discharged and overflows to the upper side of the drain pipe 40, and the underground water is reversely pressed into the drain pipe 40 under the action of the interlayer 10, so that the underground water is prevented from permeating into the foundation pit, and the structure of the foundation pit is prevented from being influenced.
The specific structure of the interlayer 10 is that the interlayer 10 comprises a protective layer 101, a waterproof layer 102 and a concrete cushion layer 103 which are sequentially arranged, and the blind ditch 20 is positioned at the lower side of the concrete cushion layer 103.
The arrangement structure of the protective layer 101, the waterproof layer 102 and the concrete cushion layer 103 not only enables the interlayer 10 to have good strength, but also has good waterproof performance.
The protective layer 101 is concrete, and the waterproof layer 102 is a waterproof roll, which is not limited to the above materials.
In the specific implementation, a well pipe 602 communicated with the upper end of the strainer 601 is arranged in the dewatering well 60, the upper end surface of the well pipe 602 is not lower than the upper surface of the barrier 10, and the barrier 10 is arranged around the outer side of the well pipe 602 to fix the well pipe 602.
The lower end surface of the well pipe 602 is lower than the ground surface height, and the lower end of the well pipe 602 plays a role of supporting the wellhead of the dewatering well 60 to prevent the wellhead from collapsing; the lower end face of the well pipe 602 is higher than the drain pipe 40, so that the extending direction of the water outlet of the drain pipe 40 is opposite to the side wall of the strainer pipe 601, but the area for supporting the outer wall of the well pipe 602 is small, and the well pipe cannot be stably fixed at the well mouth of the dewatering well 60, by arranging the interlayer 10, the interlayer 10 is in contact and abutting with the side wall of the well pipe 602, and the strength, hardness and thickness of the interlayer 10 enable the well pipe 602 to be positioned and supported by the interlayer 10 in the radial direction, so that the well mouth of the dewatering well 60 is prevented from being damaged due to movement or toppling over of the well pipe 602.
The barrier 10 not only acts as a back pressure against the groundwater but also has the function of a positioning support for the well pipe 602.
In practical applications, the diameter of the dewatering well 60 is larger than that of the strainer 601.
In a further improvement of this embodiment, the filler material 30 is filled between the dewatering well 60 and the strainer 601.
The inner wall of the precipitation well 60 has water permeability for groundwater to permeate, the groundwater directly permeated from the side wall of the precipitation well 60 is filtered by the filling filter material 30 between the precipitation well 60 and the filter pipe 601 and enters the inner side of the filter pipe 601, thereby avoiding bringing foreign matters and impurities into the precipitation well 60 and the inner side of the filter pipe 601, increasing the way of groundwater collection, and improving the efficiency of groundwater collection.
Preferably, the outer walls of the drain pipe 40 and the strainer pipe 601 are sleeved with a filter screen 50.
In the construction application, a settling pipe 603 communicated with the lower end of the strainer 601 is also arranged in the dewatering well 60; the lower end of the settling tube 603 is arranged in a closed manner.
The settling tube 603 collects fine sand and debris flowing into the strainer 601, preventing the strainer 601 from being clogged with sediment.
As shown in fig. 3-5, the invention also provides a foundation pit bottom sealing construction method, which comprises the following steps:
removing the interlayer 10 and pouring a bottom plate 70 at the bottom of the foundation pit, wherein the bottom of the bottom plate 70 seals the blind ditch 20 and is fixedly connected with the side wall of the well pipe 602;
draining the underground water in the strainer 601, and then filling the strainer 601 with concrete in multiple times until the distance between the upper surface of the poured concrete and the bottom is a preset distance;
placing a cover plate 90 in the well pipe 602 and compacting the concrete, the cover plate 90 being fixed to the inner wall of the well pipe 602;
and pouring cement mortar 80 into the well pipe 602 for filling, and sealing the well mouth of the dewatering well 60.
The specific implementation process is that the interlayer 10 only plays an auxiliary role of temporary use, so the interlayer 10 is firstly removed to avoid influencing the structure and normal construction steps of the foundation pit, after the interlayer 10 is removed, the bottom is poured, the blind ditch 20 is plugged, the underground water in the dewatering well 60 is discharged after the bottom plate 70 is condensed, plugging the dewatering well 60 by a graded pouring mode, after pouring to a preset height, putting the cover plate 90 into the well pipe 602 to compact the concrete, meanwhile, the cover plate 90 is connected with the inner wall of the well pipe 602 to improve the plugging quality, cement mortar 80 is poured into the well pipe 602 to plug the upper side of the cover plate 90, so that the wellhead of the dewatering well 60 is flush with the upper surface of the bottom plate 70, the construction operation of sealing the bottom of the foundation pit is completed, the influence of the blind ditch 20 and the dewatering well 60 on the structure and normal construction steps of the foundation pit is avoided, and support is provided for subsequent high-quality construction.
In some embodiments, if the well pipe 602 extends to the upper side of the barrier 10, a portion of the well pipe 602 located on the upper side of the bottom plate 70 is cut away.
Preferably, the portion of the well pipe 602 on the upper side of the bottom plate 70 is cut away before placing the cover plate 90 in the well pipe 602 and compacting the concrete.
In some embodiments, the draining of the groundwater in the strainer 601 includes: and pumping the groundwater in the drainage pump until the liquid level of the groundwater is reduced to the bottom of the well, namely the bottom of the settling tube 603.
Further set up, pour into the concrete to precipitation well 60 in grades and fill, include: after the first concrete 100 is poured, the first concrete 100 is tamped, and after the first concrete 100 is set, the second concrete 110 is poured.
In actual operation, if the groundwater in the dewatering well 60 seeps out above the first concrete 100, the groundwater is first drained and then poured into the second concrete 110.
The top of the first concrete 100 is one meter from the floor 70 and the top of the second concrete 110 is ten centimeters from the floor 70.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a foundation ditch groundwater collects structure, includes mutual french drain and precipitation well that communicate, is arranged in the drain pipe of groundwater drainage to precipitation well in the french drain, be equipped with strainer, its characterized in that in the precipitation well: the blind ditch is characterized by further comprising a permeable filling filter material filled in the blind ditch, the drain pipe is buried in the filling filter material, the filling filter material is filled between the water outlet of the drain pipe and the strainer pipe, a plurality of rows of water seepage holes distributed in a surrounding mode are arranged on the drain pipe, and the water seepage holes are alternately arranged in an axial direction of the drain pipe.
2. A foundation pit groundwater collection structure as claimed in claim 1, wherein: the drain pipe extends downwards towards the dewatering well.
3. A foundation pit ground water collection structure according to claim 2, wherein: the blind ditch is obliquely arranged and is parallel to the drain pipe.
4. A foundation pit groundwater collection structure as claimed in claim 1, wherein: the blind ditch also comprises an interlayer for preventing underground water from overflowing into the foundation pit, and the interlayer covers the blind ditch right above the blind ditch.
5. A foundation pit groundwater collection structure as claimed in claim 4, wherein: the interlayer comprises a protective layer, a waterproof layer and a concrete cushion layer which are sequentially arranged, and the blind ditch is positioned on the lower side of the concrete cushion layer.
6. A foundation pit groundwater collection structure as claimed in claim 4, wherein: the dewatering well is internally provided with a well pipe communicated with the upper end of the strainer, the upper end surface of the well pipe is not lower than the upper surface of the interlayer, and the interlayer is arranged on the outer side of the well pipe in a surrounding mode to fix the well pipe.
7. A foundation pit groundwater collection structure as claimed in claim 1, wherein: the diameter of the dewatering well is larger than that of the strainer.
8. A foundation pit groundwater collection structure as claimed in claim 1, wherein: the filling filter material is filled between the dewatering well and the strainer.
9. A foundation pit groundwater collection structure as claimed in claim 1, wherein: and the outer walls of the drain pipe and the strainer pipe are sleeved with a filter screen.
10. A foundation pit bottom sealing construction method is characterized by being based on the method steps of the foundation pit underground water collection structure of claim 4:
removing the interlayer and pouring a bottom plate at the bottom of the foundation pit, wherein the bottom of the bottom plate seals the blind ditch and is fixedly connected with the side wall of the well pipe;
draining the underground water in the filter pipe, and filling the filter pipe with concrete in batches until the distance between the upper surface and the bottom of the poured concrete is a preset distance;
placing a cover plate in the well pipe and compacting concrete, wherein the cover plate is fixed on the inner wall of the well pipe;
and pouring cement mortar into the well pipe for filling, and sealing and leveling the well mouth of the dewatering well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210774758.5A CN115075276A (en) | 2022-07-01 | 2022-07-01 | Foundation pit underground water collection structure and foundation pit bottom sealing construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210774758.5A CN115075276A (en) | 2022-07-01 | 2022-07-01 | Foundation pit underground water collection structure and foundation pit bottom sealing construction method |
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| CN115075276A true CN115075276A (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210774758.5A Pending CN115075276A (en) | 2022-07-01 | 2022-07-01 | Foundation pit underground water collection structure and foundation pit bottom sealing construction method |
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| CN (1) | CN115075276A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030059258A1 (en) * | 2001-09-24 | 2003-03-27 | Lee Tai S. | Under drainage method for building using perforated drain pipes |
| CN209723004U (en) * | 2019-03-27 | 2019-12-03 | 中建一局集团第二建筑有限公司 | A kind of shut-in well structure of raft plate built-in Precipitation Structure and dewatering well |
| CN211172034U (en) * | 2019-10-29 | 2020-08-04 | 中铁二局第一工程有限公司 | Water-rich basement falls drainage structures |
| CN113585274A (en) * | 2021-08-19 | 2021-11-02 | 北京隧盾市政建设有限公司 | Foundation pit with blind ditches and water collecting wells and construction process thereof |
-
2022
- 2022-07-01 CN CN202210774758.5A patent/CN115075276A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030059258A1 (en) * | 2001-09-24 | 2003-03-27 | Lee Tai S. | Under drainage method for building using perforated drain pipes |
| CN209723004U (en) * | 2019-03-27 | 2019-12-03 | 中建一局集团第二建筑有限公司 | A kind of shut-in well structure of raft plate built-in Precipitation Structure and dewatering well |
| CN211172034U (en) * | 2019-10-29 | 2020-08-04 | 中铁二局第一工程有限公司 | Water-rich basement falls drainage structures |
| CN113585274A (en) * | 2021-08-19 | 2021-11-02 | 北京隧盾市政建设有限公司 | Foundation pit with blind ditches and water collecting wells and construction process thereof |
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