CN115217137B - Anti-radiation raft foundation dewatering well sealing structure and construction method - Google Patents

Anti-radiation raft foundation dewatering well sealing structure and construction method Download PDF

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Publication number
CN115217137B
CN115217137B CN202210868902.1A CN202210868902A CN115217137B CN 115217137 B CN115217137 B CN 115217137B CN 202210868902 A CN202210868902 A CN 202210868902A CN 115217137 B CN115217137 B CN 115217137B
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well
fixing
sand
well sealing
ring
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CN115217137A (en
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董军业
相阳
刘杰
张飞
王军
袁壮
乔元亮
王同刚
马威
周亚
神州
张汝超
王苗
马桂宁
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First Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
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First Construction Co Ltd of China Construction Eighth Engineering Division Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/06Restraining of underground water
    • E02D19/10Restraining of underground water by lowering level of ground water
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Foundations (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

The invention discloses a radiation-proof raft foundation dewatering well sealing structure and a construction method, and relates to the technical field of dewatering well sealing. The beneficial effects of the invention are as follows: inside existence logical seam when traditional well sealing device later stage shutoff, the radiation protection raft foundation precipitation well sealing structure of this scheme design is through setting up middle part cavity and top cavity as the isolation layer, when impervious concrete is pour to the later stage, all forms unsmooth concrete structure at middle part cavity and top cavity to and optimize into unsmooth shape with the inside vertical link joint seam of traditional well sealing device, realized effectively blocking radiation ray.

Description

Anti-radiation raft foundation dewatering well sealing structure and construction method
Technical Field
The invention relates to the technical field of dewatering well sealing, in particular to a radiation-proof raft foundation dewatering well sealing structure and a construction method.
Background
Proton and heavy ion treatment technology is one of radiotherapy, is internationally recognized radiotherapy tip technology, and represents the highest technology and future trend of radiotherapy relative to traditional radiotherapy developed for century, and the number of proton heavy ion hospitals in China is gradually increased at present.
Because proton heavy ion treatment involves radiation operation, the treatment room often adopts structures such as walls, floors and the like with larger thickness, and most of the structures are large-volume concrete construction, for example, the proton heavy ion hospital project in Xuzhou, the thickness of a raft in a proton heavy ion area reaches 3m, the local thickness reaches 6m, and the concrete pouring amount of the raft exceeds 1 ten thousand cubes. When the raft foundation is below the ground water level, a precipitation well is required to be constructed in the earth excavation and underground structure construction stage, continuous precipitation is carried out on the foundation pit, and the precipitation is generally stopped only by sealing the top of the main body, so that steel pipes (penetrating through the raft and going deep into the precipitation well) are required to be installed on the precipitation well during the raft construction, and the precipitation construction after the completion of the raft construction is satisfied;
however, the traditional well sealing device is of a straight barrel structure, through seams are formed in the barrel during later plugging, radiation leakage can occur in the radiation protection structure, radiation influence is generated on soil, and meanwhile, how to temporarily fix the ultra-high well sealing steel pipe is an urgent problem to be solved for ultra-thick raft plates, so that the traditional well sealing device needs to be improved in proton heavy ion structure construction.
Disclosure of Invention
In order to achieve the above-mentioned aim, the present invention provides a radiation-proof raft foundation dewatering well sealing structure and a construction method thereof.
The technical scheme is that the sand-free well sealing device comprises a well sealing steel cylinder, wherein the well sealing steel cylinder comprises a temporary fixing ring unit, a lower clamping ring, a well sealing pipe cylinder, a middle cavity and a top cavity which are arranged from bottom to top along a sand-free pipe well;
the bottom of the well sealing pipe barrel is provided with a bottom downward extending barrel, and the diameter of the barrel body of the bottom downward extending barrel is smaller than the inner diameter of the sand-free pipe well.
The temporary fixing ring unit comprises a fixing ring, a base plate, a fixing bolt, a fixing nut and a fixing upright rod.
The middle cavity and the top cavity are both arranged as annular cavities, the top of the top cavity is provided with an opening, and the diameters of the cylinder bodies of the middle cavity and the top cavity are both larger than the diameter of the well sealing cylinder.
The lower clamping ring is arranged in an annular shape and is fixedly arranged on the outer wall of the well sealing pipe barrel.
The two fixing rings are arranged, each fixing ring is semi-annular, and the two fixing rings are fixedly connected through a base plate, a fixing bolt and a fixing nut.
The two fixing rings are sleeved outside the sand-free pipe well, the inner diameter of each fixing ring is equal to the outer diameter of the sand-free pipe well, threaded holes are formed in two ends of each fixing ring, threaded holes are formed in two ends of each backing plate, and the backing plates are fixedly connected with the fixing rings through fixing bolts and fixing nuts.
The fixed vertical rod is arranged on the upper surface of the fixed ring, and the fixed ring and the lower clamping ring are welded and fixed through the fixed vertical rod.
The construction method of the well sealing structure of the precipitation well based on the radiation-proof raft foundation comprises the following steps:
s1, when earthwork is excavated to a bedding position, placing the bottom of a well sealing steel cylinder in a sand-free pipe well, and ensuring that the bottom lower extension cylinder completely enters the sand-free pipe well, wherein at the moment, a lower clamping ring is just positioned at the top of the sand-free pipe well;
the inner diameter of the fixing ring is equal to the outer diameter of the sand-free pipe well, so that the well body of the sand-free pipe well can be just blocked when the two fixing rings are in a combined state;
s2, simultaneously, the fixing ring is welded with the lower clamping ring through a fixing upright rod;
s3, when the well sealing steel cylinder is placed on the sand-free pipe well, installing a backing plate, and fixing the two semi-annular fixing rings into a whole through the fixing bolts and the fixing nuts, so that the whole well sealing steel cylinder can be stably fixed on the sand-free pipe well;
s4, in the later raft pouring process, the lower clamping ring and the middle cavity directly enter a concrete structure, the whole outside of the well sealing steel cylinder is completely wrapped by concrete, and a channel for upward drainage of a pipe well can still be formed in the well sealing steel cylinder.
When the site construction is carried out until precipitation is not needed, the well sealing steel cylinder is required to be finally plugged, and the method comprises the following steps of:
s1, lifting out devices such as a water pump, a water pipe and the like in a sand-free pipe well after the structure is constructed until no underground water is required to be discharged;
s2, filling graded broken stone into the sand-free pipe well to the lower area of the middle cavity;
s3, filling impervious concrete into the upper region of the graded broken stone to fill the whole well sealing steel cylinder to the same height as the top elevation of the raft;
s4, in order to ensure the water-proof effect, water-stop expansion adhesive tapes are symmetrically arranged on the side wall of the middle cavity, so that the water-proof function of the well sealing device is improved.
The technical scheme provided by the embodiment of the invention has the beneficial effects that: the invention provides a radiation-proof raft foundation dewatering well sealing structure and a construction method, which can solve the following construction problems:
(1) The through seams are formed in the traditional well sealing device during later plugging, and the radiation-proof raft foundation dewatering well sealing structure designed by the scheme has the advantages that the middle cavity and the top cavity are arranged to serve as isolation layers, when impervious concrete is poured in the later period, concave-convex concrete structures are formed in the middle cavity and the top cavity, and the vertical through connecting seams in the traditional well sealing device are optimized to be concave-convex, so that radiation rays are effectively blocked;
(2) The raft that proton heavy ion building adopted is super thick raft, consequently the well sealing device is all great, appears rocking easily in concrete work progress, leads to appearing empting the potential safety hazard, and this scheme is when the steel cylinder of sealing the well is placed in no sand pipe tubular well, and the installation backing plate is fixed into a whole with two semi-annular retainer plates through fixing bolt with fixation nut has realized that whole steel cylinder of sealing the well can be firm fix on no sand pipe tubular well, has effectively reduced the too high hidden danger that appears empting of well sealing device in the super thick raft, has effectively guaranteed site operation safety.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present invention.
Fig. 2 is a partial enlarged view of a of fig. 1.
FIG. 3 is a cross-sectional view of an embodiment of the present invention.
Fig. 4 is a schematic diagram of a later plugging mode of a steel cylinder for well sealing according to an embodiment of the invention.
Wherein, the reference numerals are as follows: 1. a sand-free pipe well; 2. a temporary fixing ring unit; 3. a lower clasp; 4. a shut-in tube; 5. a middle cavity; 6. a top cavity; 7. a bottom lower extension cylinder; 201. a fixing ring; 202. a backing plate; 203. a fixing bolt; 204. a fixing nut; 205. fixing the vertical rod; 8. grading crushed stone; 9. impervious concrete; 10. and (5) a water-stopping expansion adhesive tape.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. Of course, the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.
Example 1
Referring to fig. 1 to 4, the invention provides a radiation-proof raft foundation dewatering well sealing structure and a construction method, wherein the radiation-proof raft foundation dewatering well sealing structure comprises a well sealing steel cylinder, wherein the well sealing steel cylinder comprises a temporary fixing ring unit 2, a lower clamping ring 3, a well sealing pipe barrel 4, a middle cavity 5 and a top cavity 6 which are arranged from bottom to top along a sand-free pipe well 1;
the bottom of the well sealing tube 4 is provided with a bottom downward extending tube 7, and the diameter of the tube body of the bottom downward extending tube 7 is smaller than the inner diameter of the sand-free tube well 1.
The temporary fixing ring unit 2 includes a fixing ring 201, a backing plate 202, a fixing bolt 203, a fixing nut 204, and a fixing upright 205.
The middle cavity 5 and the top cavity 6 are all arranged as annular cavities, the top of the top cavity 6 is provided with an opening, and the diameters of the cylinder bodies of the middle cavity 5 and the top cavity 6 are both larger than the diameter of the well sealing cylinder 4.
The lower clamp ring 3 is annular, and the lower clamp ring 3 is fixedly arranged on the outer wall of the well sealing pipe barrel 4.
The two fixing rings 201 are arranged, each fixing ring 201 is semi-annular, and the two fixing rings 201 are fixedly connected through a base plate 202, a fixing bolt 203 and a fixing nut 204.
Two retainer plates 201 cup joint in the outside of no sand pipe tube 1, and the internal diameter of retainer plate 201 equals with the external diameter of no sand pipe tube 1, and the both ends of retainer plate 201 all are provided with the screw hole, and the backing plate 202 both ends are provided with the screw hole, pass through fixing bolt 203 and fixation nut 204 fixed connection between backing plate 202 and the retainer plate 201.
The fixed upright rod 205 is arranged on the upper surface of the fixed ring 201, and the fixed ring 201 and the lower clamping ring 3 are welded and fixed through the fixed upright rod 205.
The construction method of the well sealing structure of the precipitation well based on the radiation-proof raft foundation comprises the following steps:
s1, when earthwork is excavated to a bedding position, placing the bottom of a well sealing steel cylinder in a sand-free pipe well 1, ensuring that the bottom downward extending cylinder 7 completely enters the sand-free pipe well 1, and at the moment, the lower clamping ring 3 is just positioned at the top of the sand-free pipe well 1;
the inner diameter of the fixing ring 201 is equal to the outer diameter of the sand-free pipe well 1, so that the well body of the sand-free pipe well 1 can be just blocked when the two fixing rings 201 are in a combined state;
s2, simultaneously, the fixing ring 201 is welded with the lower clamping ring 3 through the fixing upright rod 205;
s3, when the well sealing steel cylinder is placed on the sand-free pipe well 1, the base plate 202 is installed, and the two semi-annular fixing rings 201 are fixed into a whole through the fixing bolts 203 and the fixing nuts 204, so that the whole well sealing steel cylinder can be stably fixed on the sand-free pipe well 1;
s4, in the later raft pouring process, the lower clamping ring 3 and the middle cavity 5 directly enter a concrete structure to be poured, the whole outside of the well sealing steel cylinder is completely wrapped by concrete, and a channel for upward drainage of a pipe well can be formed in the well sealing steel cylinder.
When the site construction is carried out until precipitation is not needed, the well sealing steel cylinder is required to be finally plugged, and the method comprises the following steps of:
s1, lifting devices such as a water pump, a water pipe and the like in a sand-free pipe well 1 after the structure is constructed until no underground water is required to be discharged;
s2, filling graded broken stone 8 into the sand-free pipe well 1 to the lower area of the middle cavity 5;
s3, pouring impervious concrete 9 into the upper area of the graded broken stone 8 to fill the whole well sealing steel cylinder to the same height as the top elevation of the raft;
s4, in order to ensure the water-proof effect, water-stop expansion adhesive tapes 10 are symmetrically arranged on the side wall of the middle cavity 5, so that the water-proof function of the well sealing device is improved.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (5)

1. The well sealing structure of the radiation-proof raft foundation dewatering well is characterized by comprising a well sealing steel cylinder, wherein the well sealing steel cylinder comprises a temporary fixing ring unit (2), a lower clamping ring (3), a well sealing pipe cylinder (4), a middle cavity (5) and a top cavity (6) which are arranged from bottom to top along a sand-free pipe well (1);
the bottom of the well sealing pipe barrel (4) is provided with a bottom downward extending barrel (7), and the diameter of the barrel body of the bottom downward extending barrel (7) is smaller than the inner diameter of the sand-free pipe well (1);
the temporary fixing ring unit (2) comprises a fixing ring (201), a base plate (202), a fixing bolt (203), a fixing nut (204) and a fixing upright rod (205);
the middle cavity (5) and the top cavity (6) are both annular cavities, the top of the top cavity (6) is provided with an opening, and the diameters of the cylinder bodies of the middle cavity (5) and the top cavity (6) are both larger than the diameter of the well sealing cylinder (4);
the two fixing rings (201) are sleeved outside the sand-free pipe well (1), the inner diameter of each fixing ring (201) is equal to the outer diameter of the sand-free pipe well (1), threaded holes are formed in the two ends of each fixing ring (201), threaded holes are formed in the two ends of each backing plate (202), and the backing plates (202) are fixedly connected with the fixing rings (201) through the fixing bolts (203) and the fixing nuts (204);
the fixed vertical rod (205) is arranged on the upper surface of the fixed ring (201), and the fixed ring (201) and the lower clamping ring (3) are fixed through welding of the fixed vertical rod (205).
2. The radiation-proof raft foundation dewatering well sealing structure according to claim 1, wherein the lower clamping ring (3) is arranged in a ring shape, and the lower clamping ring (3) is fixedly arranged on the outer wall of the well sealing tube (4).
3. The radiation-proof raft foundation dewatering well sealing structure according to claim 1, wherein two fixing rings (201) are arranged, each fixing ring (201) is semi-annular, and the two fixing rings (201) are fixedly connected through a base plate (202), a fixing bolt (203) and a fixing nut (204).
4. The construction method of the radiation-proof raft foundation dewatering well sealing structure based on the claim 3 is characterized by comprising the following steps:
s1, when earthwork is excavated to a bedding position, placing the bottom of a well sealing steel cylinder in a sand-free pipe well (1), ensuring that the bottom lower extension cylinder (7) completely enters the sand-free pipe well (1), and at the moment, the lower clamping ring (3) is just positioned at the top of the sand-free pipe well (1);
the inner diameter of the fixing ring (201) is equal to the outer diameter of the sand-free pipe well (1), so that the well body of the sand-free pipe well (1) can be just clamped when the two fixing rings (201) are in a combined state;
s2, simultaneously, the fixing ring (201) is connected with the lower clamping ring (3) through a fixing upright rod (205) in a welding way;
s3, when the well sealing steel cylinder is placed on the sand-free pipe well (1), the base plate (202) is installed, and the two semi-annular fixing rings (201) are fixed into a whole through the fixing bolts (203) and the fixing nuts (204), so that the whole well sealing steel cylinder can be stably fixed on the sand-free pipe well (1);
s4, in the later raft pouring process, the lower clamping ring (3) and the middle cavity (5) directly enter a concrete structure to be poured, the whole outside of the well sealing steel cylinder is completely wrapped by concrete, and a channel for upward drainage of a pipe well can be formed in the well sealing steel cylinder.
5. The construction method of the radiation-proof raft foundation dewatering well sealing structure based on claim 1 is characterized in that when the construction is carried out on site until dewatering is not needed, the sealing steel cylinder is required to be subjected to final sealing, and the construction method comprises the following steps:
s1, lifting out devices such as a water pump, a water pipe and the like in a sand-free pipe well (1) after the structure is constructed until no underground water is needed to be discharged;
s2, filling graded broken stone (8) into the sand-free pipe well (1) to the lower area of the middle cavity (5);
s3, pouring impervious concrete (9) into the upper area of the graded broken stone (8) to fill the whole well sealing steel cylinder to the same height as the top elevation of the raft;
s4, in order to ensure the water-proof effect, water-stop expansion adhesive tapes (10) are symmetrically arranged on the side wall of the middle cavity (5), so that the water-proof function of the well sealing device is improved.
CN202210868902.1A 2022-07-22 2022-07-22 Anti-radiation raft foundation dewatering well sealing structure and construction method Active CN115217137B (en)

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JP2007146568A (en) * 2005-11-30 2007-06-14 Public Works Research Institute Groundwater draining method and catchment well
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FR2977902A1 (en) * 2011-07-11 2013-01-18 Rector Lesage Method for manufacturing floor of building on insulated crawl-space foundations, involves simultaneously sealing foundation pieces on ground as well as longitudinal beams between them and with pieces during single concrete casting operation
CN103452125A (en) * 2013-06-05 2013-12-18 中建保华建筑有限责任公司 Rock gap water blocking structure and construction method on geologic condition of weathered rocks
CN107700511A (en) * 2017-09-06 2018-02-16 中国水利水电第十工程局有限公司 Open caisson and its construction method under the conditions of a kind of phreatic high
CN209523196U (en) * 2018-12-04 2019-10-22 南通勘察设计有限公司 A kind of fast plugging device for deep foundation pit precipitation well
CN111042569A (en) * 2019-12-31 2020-04-21 广东省第一建筑工程有限公司 Construction method for additionally building linear accelerator machine room in limited space of basement of hospital
CN210887265U (en) * 2019-10-08 2020-06-30 浙江江河建设有限公司 Pipe well plugging device
DE202020106399U1 (en) * 2020-06-30 2020-11-20 No.4 Engineering Co., Ltd Of China Railway No. 9 Group Blocking device for blocking a drainage shaft
CN212452713U (en) * 2020-01-10 2021-02-02 河南宏程工程建设有限责任公司 A plugging device for raft foundation precipitation well head
CN114718101A (en) * 2022-04-29 2022-07-08 中冶长天国际工程有限责任公司 Seepage interception structure of tailing pond of seepage interception wall combined dewatering well and construction method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007146568A (en) * 2005-11-30 2007-06-14 Public Works Research Institute Groundwater draining method and catchment well
DE102008026567A1 (en) * 2008-06-03 2009-12-10 GEOTEX Ingenieurgesellschaft für Straßen- und Tiefbau mbH Stationary stratified flood protection
FR2977902A1 (en) * 2011-07-11 2013-01-18 Rector Lesage Method for manufacturing floor of building on insulated crawl-space foundations, involves simultaneously sealing foundation pieces on ground as well as longitudinal beams between them and with pieces during single concrete casting operation
CN103452125A (en) * 2013-06-05 2013-12-18 中建保华建筑有限责任公司 Rock gap water blocking structure and construction method on geologic condition of weathered rocks
CN107700511A (en) * 2017-09-06 2018-02-16 中国水利水电第十工程局有限公司 Open caisson and its construction method under the conditions of a kind of phreatic high
CN209523196U (en) * 2018-12-04 2019-10-22 南通勘察设计有限公司 A kind of fast plugging device for deep foundation pit precipitation well
CN210887265U (en) * 2019-10-08 2020-06-30 浙江江河建设有限公司 Pipe well plugging device
CN111042569A (en) * 2019-12-31 2020-04-21 广东省第一建筑工程有限公司 Construction method for additionally building linear accelerator machine room in limited space of basement of hospital
CN212452713U (en) * 2020-01-10 2021-02-02 河南宏程工程建设有限责任公司 A plugging device for raft foundation precipitation well head
DE202020106399U1 (en) * 2020-06-30 2020-11-20 No.4 Engineering Co., Ltd Of China Railway No. 9 Group Blocking device for blocking a drainage shaft
CN114718101A (en) * 2022-04-29 2022-07-08 中冶长天国际工程有限责任公司 Seepage interception structure of tailing pond of seepage interception wall combined dewatering well and construction method thereof

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