CN112647524A - Plugging method for dewatering well in foundation pit - Google Patents

Plugging method for dewatering well in foundation pit Download PDF

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Publication number
CN112647524A
CN112647524A CN202011508526.2A CN202011508526A CN112647524A CN 112647524 A CN112647524 A CN 112647524A CN 202011508526 A CN202011508526 A CN 202011508526A CN 112647524 A CN112647524 A CN 112647524A
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steel pipe
water
dewatering well
foundation pit
plugging
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韩少博
蒋应伟
何刚
何长林
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China MCC5 Group Corp Ltd
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China MCC5 Group Corp Ltd
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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
    • 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

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
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Abstract

本发明公开一种在基坑内降水井的封堵方法，包括以下步骤：S1：选定降水井位置，并插入钢管作为降水井井壁；S2：在钢管颈部焊接止水环，在钢管顶部焊接连接环；S3：在钢管外壁设置防水卷材，防水卷材由井底到止水环下方为止；S4：在止水环下方设置止水铜条卡箍，止水铜条卡箍用于卡紧防水卷材；S5：在基坑以及降水井两侧铺设底板，底板上设置有预留封堵位，预留封堵位中设置钢管；S6：在钢管中放入水泵，将水将至基坑最低点以下50cm，待地下室结构完成后，停止降水；S7：撤出水泵，并在降水井中充填砂砾，在连接环上加封带有孔的井盖；S8：沿井盖上的孔注浆。将地下承压水边泄压边封堵，确保封堵质量，且设置有多道防水措施，避免了结构底板渗漏。

Figure 202011508526

The invention discloses a method for plugging a dewatering well in a foundation pit, comprising the following steps: S1: selecting the location of the dewatering well, and inserting a steel pipe as the wall of the dewatering well; S2: welding a water stop ring on the neck of the steel pipe, and placing a water stop on the top of the steel pipe Welding connection ring; S3: Set the waterproof membrane on the outer wall of the steel pipe, and the waterproof membrane goes from the bottom of the well to the bottom of the water stop ring; S4: Set the water stop copper strip clamp under the water stop ring, and the water stop copper strip clamp is used for clamping Tighten the waterproof membrane; S5: Lay the bottom plate on both sides of the foundation pit and the dewatering well, set a reserved blocking position on the bottom plate, and set the steel pipe in the reserved blocking position; S6: Put a water pump in the steel pipe, and the water will reach 50cm below the lowest point of the foundation pit, stop rainwater after the basement structure is completed; S7: withdraw the water pump, fill the dewatering well with gravel, and seal the manhole cover with holes on the connecting ring; S8: grouting along the holes on the manhole cover. The underground pressurized water is sealed while releasing the pressure to ensure the sealing quality, and multiple waterproof measures are provided to avoid the leakage of the structural bottom plate.

Figure 202011508526

Description

Plugging method for dewatering well in foundation pit
Technical Field
The invention relates to the field of foundation pit engineering, in particular to a method for plugging a dewatering well in a foundation pit.
Background
In the construction process of basement water-resisting plates, raft plates and the like, because of the existence of underground confined water, the design usually can be realized by arranging a part of dewatering wells at the periphery of a foundation pit, increasing the structure thickness or increasing anti-floating anchor rods so as to reduce the underground water level and increase anti-floating. And often because foundation ditch width is broad, the foundation ditch area is great, the precipitation well all around the foundation ditch can't reduce the middle water level of foundation ditch, so in the work progress, relevant unit can add interim precipitation well at foundation ditch central part or relevant position for reduce the foundation ditch water level.
Because the dewatering well is newly added in the structure, the dewatering well penetrating through the bottom plate needs to be plugged to meet the use function of the building engineering. When the underground water level is high and the water amount is rich, due to the reasons of incorrect selection position of the dewatering well, imperfect traditional construction method and the like, the underground pressure-bearing water cannot be leaked and blocked when the dewatering well is closed, and therefore the structural bottom plate can be permanently seeped. Therefore, a plugging method of the dewatering well in the foundation pit with good sealing effect and strong anti-seepage performance is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problems and provides a plugging method of a dewatering well in a foundation pit, which is used for plugging the edge of underground pressure-bearing water while leaking and pressing the edge to ensure the plugging quality, is provided with a plurality of waterproof measures to avoid the leakage of a structural bottom plate, and has the advantages of simple and convenient construction method, high construction speed and lower cost.
The technical scheme adopted by the invention is as follows: a plugging method of a dewatering well in a foundation pit comprises the following steps:
s1: selecting the position of the dewatering well, and inserting a steel pipe to serve as the wall of the dewatering well;
s2: welding a water stop ring at the neck of the steel pipe, and welding a connecting ring at the top of the steel pipe;
s3: arranging a waterproof coiled material on the outer wall of the steel pipe, wherein the waterproof coiled material is arranged from the bottom of the well to the position below the water stop ring;
s4: a water-stopping copper bar clamp is arranged below the water-stopping ring and used for clamping the waterproof coiled material;
s5: laying bottom plates on two sides of the foundation pit and the dewatering well, wherein reserved plugging positions are arranged on the bottom plates, and the steel pipes are arranged in the reserved plugging positions;
s6: putting a water pump in the steel pipe, putting water to 50cm below the lowest point of the foundation pit, and stopping dewatering after the basement structure is finished;
s7: withdrawing the water pump, filling gravel in the dewatering well, and sealing a well cover with a hole on the connecting ring;
s8: and (5) grouting along the hole on the well cover. The construction method has the advantages that the underground pressure-bearing water is subjected to edge leakage and edge sealing, the sealing quality is ensured, multiple waterproof measures are adopted, the structural bottom plate is prevented from leaking, the construction method is simple and convenient, the construction speed is high, and the cost is low. The defect that underground water carries slurry out when gravel is filled in a well and cement slurry are effectively combined to replace traditional in-well concrete pouring is overcome.
Preferably, in step S1, dewatering wells are arranged around the lowest point of the foundation pit, and the water level is lowered to 50cm below the lowest point of the foundation pit.
Preferably, in the step S1, the method further comprises excavating earth, cutting the steel pipe to a position 25cm lower than the top of the bottom plate, and selecting the steel pipe with a wall thickness of 1-2cm and a diameter of 30 cm.
Preferably, a plurality of grout holes are drilled in the bottom sidewall of the steel pipe before the steel pipe is inserted in step S1. The slurry can be effectively diffused to replace the traditional method of diffusing from the bottom of the dewatering well.
Preferably, in step S3, the method includes brushing an adhesive on the outer side wall of the steel pipe, attaching a rainwater expansion water stop strip outside the lower part of the water stop ring, rolling the waterproof roll material along the outer wall of the dewatering well to the lower part of the first water stop ring, and performing hot melting connection.
Preferably, in step S7, the method further includes brushing an adhesive on the connection ring, and then adhering the connection ring to the well lid.
Preferably, in step S7, the manhole cover is provided with a first steel pipe hole and a second steel pipe hole, the first steel pipe hole is used for grouting, and the second steel pipe hole is used for pressure relief and slurry overflow. Gate valves are added in the first steel pipe hole and the second steel pipe hole, and the gate valves can be closed and opened at any time to control grouting and unloading water head pressure.
Preferably, in step S8, after the well lid is sealed and before the water pressure is not increased, grouting is performed, the second steel pipe hole is opened, the first steel pipe hole is opened again, pure cement slurry is injected along the first steel pipe hole, and when slurry flows out from the second steel pipe hole, the second steel pipe hole is closed, and second grouting is performed; and (3) adopting cement-water-glass double-liquid slurry for grouting according to the proportion of 1:0.5, stopping grouting when a grouting pressure gauge shows that the pressure reaches 0.5Mpa, and closing a gate valve of a grouting port. By adopting the method of twice grouting and twice different grouting materials, the weak links in and around the dewatering well can be integrally and effectively filled, and water can be effectively stopped.
Preferably, at least one month after grouting, checking the quality of waterproof plugging, judging whether water seepage occurs or not, if the water seepage continues to open a gate valve, injecting water glass slurry under pressure, if the water seepage does not occur, sealing by adopting micro-expansion concrete, and adding water glass slurry into the concrete
Figure BDA0002845630850000031
And (4) reinforcing mesh.
Compared with the prior art, the beneficial effects of adopting the technical scheme are as follows: the invention relates to a plugging method of a dewatering well in a foundation pit, which comprises the following steps: s1: selecting the position of the dewatering well, and inserting a steel pipe to serve as the wall of the dewatering well; s2: welding a water stop ring at the neck of the steel pipe, and welding a connecting ring at the top of the steel pipe; s3: arranging a waterproof coiled material on the outer wall of the steel pipe, wherein the waterproof coiled material is arranged from the bottom of the well to the position below the water stop ring; s4: a water-stopping copper bar clamp is arranged below the water-stopping ring and used for clamping the waterproof coiled material; s5: laying bottom plates on two sides of the foundation pit and the dewatering well, wherein reserved plugging positions are arranged on the bottom plates, and the steel pipes are arranged in the reserved plugging positions; s6: putting a water pump in the steel pipe, putting water to 50cm below the lowest point of the foundation pit, and stopping dewatering after the basement structure is finished; s7: withdrawing the water pump, filling gravel in the dewatering well, and sealing a well cover with a hole on the connecting ring; s8: and (5) grouting along the hole on the well cover. The construction method has the advantages that the underground pressure-bearing water is subjected to edge leakage and edge sealing, the sealing quality is ensured, multiple waterproof measures are adopted, the structural bottom plate is prevented from leaking, the construction method is simple and convenient, the construction speed is high, and the cost is low.
Drawings
FIG. 1 is a principal structural view of the present invention;
fig. 2 is a partial structural view of the present invention.
Description of the symbols of the main elements: 1. a base plate; 2. a steel pipe; 3. a water pump; 4. a water stop ring; 5. a well cover; 6. water stopping the copper strip hoop; 7. waterproof coiled materials; 21. a connecting ring; 51. a first steel pipe hole; 52. and a second steel pipe hole.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings. In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1: referring to fig. 1 and 2, a plugging method for a dewatering well in a foundation pit according to the embodiment includes the following steps: s1: selecting the position of the dewatering well, and inserting the steel pipe 2 as the wall of the dewatering well; s2: welding a water stop ring 4 at the neck of the steel pipe 2, and welding a connecting ring 21 at the top of the steel pipe 2; s3: the outer wall of the steel pipe 2 is provided with a waterproof coiled material 7, and the waterproof coiled material 7 extends from the bottom of the well to the position below the water stop ring 4; s4: a water-stopping copper bar clamp 6 is arranged below the water-stopping ring 4, and the water-stopping copper bar clamp 6 is used for clamping a waterproof coiled material 7; s5: laying bottom plates 1 on two sides of a foundation pit and a dewatering well, wherein reserved plugging positions are arranged on the bottom plates 1, and steel pipes 2 are arranged in the reserved plugging positions; s6: putting a water pump 3 into the steel pipe 2, putting water 50cm below the lowest point of the foundation pit, and stopping dewatering after the basement structure is finished; s7: the water pump 3 is removed, gravel is filled in the dewatering well, and the well cover 5 with holes is additionally sealed on the connecting ring 21; s8: grouting along the hole on the well lid 5. The construction method has the advantages that the underground pressure-bearing water is subjected to edge leakage and edge sealing, the sealing quality is ensured, multiple waterproof measures are adopted, the leakage of the structural bottom plate 1 is avoided, the construction method is simple and convenient, the construction speed is high, and the cost is low. The defect that underground water carries slurry out when gravel is filled in a well and cement slurry are effectively combined to replace traditional in-well concrete pouring is overcome.
Example 2: in step S1, dewatering wells are disposed around the lowest point of the foundation pit, and the water level is lowered to 50cm below the lowest point of the foundation pit. In the step S1, the method further includes excavating earth, cutting the steel pipe 2 to a depth 25cm lower than the top of the bottom plate 1, and selecting the steel pipe 2 with a wall thickness of 1-2cm and a diameter of 30 cm. In this embodiment, before inserting the steel pipe 2 in step S1, a plurality of grout holes are drilled in the bottom side wall of the steel pipe 2. The slurry can be effectively diffused to replace the traditional method of diffusing from the bottom of the dewatering well. In the step S3 of this embodiment, the method includes brushing an adhesive on the outer sidewall of the steel pipe 2, attaching a rainwater expansion water stop strip outside the lower side of the water stop ring 4, rolling the waterproof roll 7 to the lower side of the first water stop ring 4 along the outer wall of the dewatering well, and performing hot-melt connection. In step S7, the method further includes brushing an adhesive on the connection ring 21 and then adhering the connection ring to the manhole cover 5.
Example 3: in step S7 of the present embodiment, the manhole cover 5 is provided with a first steel pipe hole 51 and a second steel pipe hole 52, the first steel pipe hole 51 is used for grouting, and the second steel pipe hole 52 is used for pressure relief and slurry overflow. Gate valves are added in the first steel pipe hole 51 and the second steel pipe hole 52, and can be closed and opened at any time to control the grouting and unloading water head pressure. In step S8 of the present embodiment, after the well lid 5 is sealed and grouting is performed before the water pressure is not reached, the second steel pipe hole 52 is opened, the first steel pipe hole 51 is opened again, pure cement slurry is injected along the first steel pipe hole 51, and when slurry flows out from the second steel pipe hole 52, the second steel pipe hole 52 is closed, and second grouting is performed; and (3) adopting cement-water-glass double-liquid slurry for grouting according to the proportion of 1:0.5, stopping grouting when a grouting pressure gauge shows that the pressure reaches 0.5Mpa, and closing a gate valve of a grouting port. By adopting the method of twice grouting and twice different grouting materials, the weak links in and around the dewatering well can be integrally and effectively filled, and water can be effectively stopped. In the embodiment, after at least one month of grouting, the quality of waterproof plugging is checked, whether water seepage occurs or not is judged, if the water seepage occurs, the gate valve is opened continuously, water glass cement is injected under pressure, if the water seepage does not occur, micro-expansion concrete is adopted for sealing, and concrete is added
Figure BDA0002845630850000051
And (4) reinforcing mesh.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1.一种在基坑内降水井的封堵方法，其特征在于，包括以下步骤：1. a plugging method of dewatering well in foundation pit, is characterized in that, comprises the following steps: S1：选定降水井位置，并插入钢管作为降水井井壁；S1: Select the position of the dewatering well, and insert the steel pipe as the wall of the dewatering well; S2：在钢管颈部焊接止水环，在钢管顶部焊接连接环；S2: Weld the water stop ring on the neck of the steel pipe, and weld the connecting ring on the top of the steel pipe; S3：在钢管外壁设置防水卷材，防水卷材由井底到止水环下方为止；S3: Set the waterproof membrane on the outer wall of the steel pipe, and the waterproof membrane extends from the bottom of the well to the bottom of the water stop ring; S4：在止水环下方设置止水铜条卡箍，所述止水铜条卡箍用于卡紧所述防水卷材；S4: A water-stop copper strip clamp is arranged under the water-stop ring, and the water-stop copper strip clamp is used to clamp the waterproof membrane; S5：在基坑以及降水井两侧铺设底板，所述底板上设置有预留封堵位，所述预留封堵位中设置所述钢管；S5: laying a base plate on both sides of the foundation pit and the dewatering well, the base plate is provided with a reserved plugging position, and the steel pipe is arranged in the reserved plugging position; S6：在钢管中放入水泵，将水将至基坑最低点以下50cm，待地下室结构完成后，停止降水；S6: Put a water pump in the steel pipe, bring the water to 50cm below the lowest point of the foundation pit, and stop the precipitation after the basement structure is completed; S7：撤出水泵，并在降水井中充填砂砾，在连接环上加封带有孔的井盖；S7: Withdraw the water pump, fill the dewatering well with gravel, and seal the well cover with holes on the connecting ring; S8：沿井盖上的孔注浆。S8: Grouting along the hole in the manhole cover. 2.根据权利要求1所述的在基坑内降水井的封堵方法，其特征在于，在S1步骤中，选取靠近基坑最低点的四周设置降水井，且将水位降至基坑最低点以下50cm。2. the plugging method of dewatering well in foundation pit according to claim 1, is characterized in that, in S1 step, choose to set up dewatering well near the lowest point of foundation pit, and water level is reduced to below lowest point of foundation pit 50cm. 3.根据权利要求1所述的在基坑内降水井的封堵方法，其特征在于，在S1步骤中，还包括开挖土方，钢管切割至比底板顶低25cm，钢管选用壁厚1-2cm，直径30cm。3. the plugging method of dewatering well in foundation pit according to claim 1, is characterized in that, in S1 step, also comprises excavation earthwork, steel pipe is cut to 25cm lower than bottom plate top, steel pipe selects wall thickness 1-2cm for use , 30cm in diameter. 4.根据权利要求1所述的在基坑内降水井的封堵方法，其特征在于，在S1步骤中，插入钢管之前，在钢管的底部侧壁钻设多个散浆孔。4 . The method for plugging a dewatering well in a foundation pit according to claim 1 , wherein, in step S1 , before inserting the steel pipe, a plurality of slurry holes are drilled on the bottom wall of the steel pipe. 5 . 5.根据权利要求1所述的在基坑内降水井的封堵方法，其特征在于，在S3步骤中，包括在钢管外侧壁刷粘结剂，并在止水环下方外贴一道雨水膨胀止水条，将防水卷材一直沿降水井外壁卷至止第一道止水环下方，并热熔连接。5. the plugging method of dewatering well in foundation pit according to claim 1, is characterized in that, in step S3, comprises brushing adhesive on the outer side wall of steel pipe, and sticks a rainwater expansion stopper below the water stop ring. Water strip, roll the waterproof membrane along the outer wall of the dewatering well to the bottom of the first water stop ring, and connect it by hot melt. 6.根据权利要求1所述的在基坑内降水井的封堵方法，其特征在于，在S7步骤中，还包括在连接环刷粘结剂，再与井盖粘结。6 . The method for plugging a dewatering well in a foundation pit according to claim 1 , wherein, in step S7 , the method further comprises brushing adhesive on the connecting ring, and then bonding with the manhole cover. 7 . 7.根据权利要求1所述的在基坑内降水井的封堵方法，其特征在于，在S7步骤中，井盖上设置有第一钢管孔和第二钢管孔，所述第一钢管孔用于注浆，第二钢管孔用于泄压溢浆。7. The method for plugging a dewatering well in a foundation pit according to claim 1, wherein in step S7, the manhole cover is provided with a first steel pipe hole and a second steel pipe hole, and the first steel pipe hole is used for Grouting, the second steel pipe hole is used for pressure relief and overflow. 8.根据权利要求7所述的在基坑内降水井的封堵方法，其特征在于，在S8步骤，在加封井盖后，且在水压未起来之前注浆，打开第二钢管孔，再打开第一钢管孔，沿着第一钢管孔注入纯水泥浆，待第二钢管孔有浆液流出，关闭第二钢管孔，并进行第二道注浆；注浆采用水泥水玻璃双液浆，配比1:0.5，当注浆压力表显示达到0.5Mpa时，停止注浆，并关闭注浆口闸阀。8. The method for plugging a dewatering well in a foundation pit according to claim 7, characterized in that, in step S8, after the manhole cover is sealed, and before the water pressure rises, grouting is performed, the second steel pipe hole is opened, and the second steel pipe hole is opened again. In the first steel pipe hole, pure cement slurry is injected along the first steel pipe hole. When the second steel pipe hole has the slurry flowing out, the second steel pipe hole is closed, and the second grouting is carried out; The ratio is 1:0.5. When the grouting pressure gauge shows that it reaches 0.5Mpa, stop grouting and close the gate valve of the grouting port. 9.根据权利要求8所述的在基坑内降水井的封堵方法，其特征在于，注浆后至少一个月，检查防水封堵质量，是否渗水，若渗水继续打开闸阀加压注入水玻璃浆，若无渗水，则采用微膨胀混凝土进行封口，混凝土内加
Figure FDA0002845630840000021
钢筋网。9. The plugging method of dewatering well in foundation pit according to claim 8, it is characterized in that, at least one month after grouting, check the quality of waterproof plugging, whether seepage water, if seepage continues to open gate valve and pressurize water glass slurry , if there is no water seepage, use micro-expansion concrete for sealing, and add
Figure FDA0002845630840000021
Steel mesh.
CN202011508526.2A 2020-12-18 2020-12-18 Plugging method for dewatering well in foundation pit Pending CN112647524A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113174981A (en) * 2021-04-23 2021-07-27 江苏固洲基础工程有限公司 Plugging device of high water pressure deep well precipitation well
CN113482026A (en) * 2021-07-18 2021-10-08 中天建设集团有限公司 Plugging method and device for pressure-bearing dewatering well
CN113789801A (en) * 2021-10-25 2021-12-14 中铁广州工程局集团有限公司 Water-rich foundation pit dewatering well plugging device and method
CN114150715A (en) * 2021-12-06 2022-03-08 中建新越建设工程有限公司 Anti-floating anchor rod reverse construction method and steel sleeve used by same
CN114482105A (en) * 2022-03-18 2022-05-13 中铁一局集团有限公司 Construction method for plugging dewatering well group with strong pressure water after ultra-deep subway station is sealed
CN115748775A (en) * 2022-12-01 2023-03-07 中建一局集团建设发展有限公司 A leaky well pipe plugging structure and construction method of post-cast bottom plate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202450536U (en) * 2011-12-29 2012-09-26 青岛新华友建工集团股份有限公司 Shallow dewatering and plugging construction device in foundation pit
CN102797266A (en) * 2012-08-31 2012-11-28 天津住宅集团建设工程总承包有限公司 Well sealing waterproof construction method for dewatering well
CN107620312A (en) * 2017-08-27 2018-01-23 中铁十二局集团有限公司 High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation
CN111501805A (en) * 2020-04-15 2020-08-07 中国二十冶集团有限公司 Foundation pit bottom plate reserved precipitation plugging device and application method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202450536U (en) * 2011-12-29 2012-09-26 青岛新华友建工集团股份有限公司 Shallow dewatering and plugging construction device in foundation pit
CN102797266A (en) * 2012-08-31 2012-11-28 天津住宅集团建设工程总承包有限公司 Well sealing waterproof construction method for dewatering well
CN107620312A (en) * 2017-08-27 2018-01-23 中铁十二局集团有限公司 High hydraulic pressure precipitation well construction and hydrostatic slip casting method for blocking in a kind of Metro station excavation
CN111501805A (en) * 2020-04-15 2020-08-07 中国二十冶集团有限公司 Foundation pit bottom plate reserved precipitation plugging device and application method thereof

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CN113174981A (en) * 2021-04-23 2021-07-27 江苏固洲基础工程有限公司 Plugging device of high water pressure deep well precipitation well
CN113174981B (en) * 2021-04-23 2022-01-11 江苏固洲基础工程有限公司 Plugging device of high water pressure deep well precipitation well
CN113482026A (en) * 2021-07-18 2021-10-08 中天建设集团有限公司 Plugging method and device for pressure-bearing dewatering well
CN113789801A (en) * 2021-10-25 2021-12-14 中铁广州工程局集团有限公司 Water-rich foundation pit dewatering well plugging device and method
CN114150715A (en) * 2021-12-06 2022-03-08 中建新越建设工程有限公司 Anti-floating anchor rod reverse construction method and steel sleeve used by same
CN114482105A (en) * 2022-03-18 2022-05-13 中铁一局集团有限公司 Construction method for plugging dewatering well group with strong pressure water after ultra-deep subway station is sealed
CN114482105B (en) * 2022-03-18 2024-04-16 中铁一局集团有限公司 Precipitation well group plugging construction method with strong pressurized water after ultra-deep subway station is closed
CN115748775A (en) * 2022-12-01 2023-03-07 中建一局集团建设发展有限公司 A leaky well pipe plugging structure and construction method of post-cast bottom plate

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Application publication date: 20210413