CN111501858A - Construction method for detecting leakage by using foundation pit bottom plate dewatering well plugging device - Google Patents
Construction method for detecting leakage by using foundation pit bottom plate dewatering well plugging device Download PDFInfo
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- CN111501858A CN111501858A CN202010295597.2A CN202010295597A CN111501858A CN 111501858 A CN111501858 A CN 111501858A CN 202010295597 A CN202010295597 A CN 202010295597A CN 111501858 A CN111501858 A CN 111501858A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
A construction method for detecting leakage by using a foundation pit bottom plate dewatering well plugging device is characterized by comprising the following steps: a. installing a steel pipe plugging device, b, using the steel pipe plugging device, c, leakage inspection, d, water seepage treatment, ensuring that no leakage phenomenon exists to plug concrete inside the steel pipe, and completing leakage detection of the foundation pit bottom plate dewatering well plugging device. The construction method for detecting leakage by using the foundation pit bottom plate dewatering well plugging device has the advantages of simple structure, convenience in manufacturing, reasonable detection process design, convenience in operation, safe and reliable engineering quality, capability of conveniently checking whether leakage occurs in underground structures, construction joints, dewatering well plugging positions and the like in advance, capability of finding out that all the water leaking positions can continue dewatering and pressure reduction by using the dewatering well in advance to perform leakage position plugging treatment, capability of ensuring the structure plugging quality, capability of meeting the requirements of building use functions and design waterproof grades, great construction cost saving and engineering cost reduction.
Description
Technical Field
The invention relates to a method for detecting leakage by plugging a precipitation well, in particular to a construction method for detecting leakage by using a foundation pit bottom plate precipitation well plugging device.
Background
With the vigorous development of construction projects in China, the number of corresponding foundation pit projects is continuously increased, the scale is increased, the depth of the foundation pit is deepened, and the foundation pit precipitation faces a new test under complex hydrogeological conditions. At present, foundation pits with large scale and deep depth are more in China, when a bottom plate is positioned in other strong permeable layers with pebbles and the like, pit-in-pit (water collecting pit, elevator shaft and the like) are influenced by underground water, construction difficulty is large, and secondary precipitation of a hole is reserved on a local bottom plate during foundation construction to ensure smooth construction of the pit-in-pit.
After foundation pit engineering foundation slab structure is accomplished, shutoff precipitation well is a difficult problem. However, in the traditional construction method, the dewatering well is firstly plugged, then the leakage position occurs when the water level rises, and then plugging treatment is carried out, so that comprehensive leakage inspection cannot be carried out on the underground structure in advance after the underground water level rises, and particularly, the leakage position is very easy to occur in engineering, and comprises the construction joint of the outer wall of a basement, the position of a wall-penetrating sleeve, a tie bolt rod, the plugging position of the dewatering well, the concrete leakage vibration defect and the like. In case leakage appears at above-mentioned position after traditional shutoff method accomplishes the precipitation well shutoff, receives groundwater to press the influence, and the secondary shutoff seepage department degree of difficulty increases at double, and the treatment cost overhead is very big to the seepage hidden danger can appear repeatedly in the later stage of water-carrying shutoff seepage point majority.
The known way of leak-off inspection therefore suffers from the inconveniences and problems described above.
Disclosure of Invention
The invention aims to provide a safe and reliable construction method for detecting leakage by using a foundation pit bottom plate dewatering well plugging device.
In order to achieve the purpose, the technical solution of the invention is as follows:
a construction method for detecting leakage by using a foundation pit bottom plate dewatering well plugging device is characterized by comprising the following steps:
a. installation steel pipe plugging device
Selecting the diameter of a steel pipe of the plugging device according to the thickness of a foundation pit bottom plate and the diameter of a concrete well pipe of a dewatering well at the lower part of the bottom plate, wherein the diameter of the steel pipe is larger than or equal to 600mm, the thickness of the steel pipe is larger than or equal to 10mm, and the length of the steel pipe is 500mm, and two steel water stop wing rings are arranged on the outer side of the steel; welding reinforcing steel bar heads at equal intervals from the bottom of the inner side of the steel pipe to serve as a bottom support of a plugging steel plate, arranging the plugging steel plate with the same inner diameter as the steel pipe at the bottom of the steel pipe, welding a water pump water pumping pipe and a wire sleeve at the middle part of the plugging steel plate, arranging a gate valve at the top of the steel pipe, and connecting the bottom of the steel pipe with a water pump by adopting a soft water hose; the whole steel pipe plugging device can be pre-buried when a bottom plate is poured or pre-buried in the later stage of a remaining construction joint;
b. plugging device using steel pipe
After the plugging condition is met, the water pump steel pipe and the plugging steel plate are placed into the steel pipe together, the plugging steel plate is guaranteed to be stably placed on the bottom support, and the water pump is used for continuously reducing the water; the water level in the precipitation well is always kept at a certain position below the plugging steel plate, and normal welding of the plugging steel plate is not influenced; performing full-length welding on the steel pipe and the blocking steel plate after wiping the welding position by using a dry towel, wherein the height of a fillet weld leg meets the standard requirement, and the quality defects of meat biting and slag inclusion cannot occur;
c. leak inspection
Stopping precipitation after the welding is finished, closing the gate valve and installing a finished wire sleeve plug; at the moment, the underground water level will be continuously raised, the water pressure is continuously increased, and the interior of the basement is immediately subjected to comprehensive leakage inspection, particularly the parts where leakage points are easy to appear in engineering, including the construction joints of the external wall of the basement, the positions of the wall-penetrating sleeves, the positions of the tie bolt rods, the plugging positions of dewatering wells and the concrete leakage vibration defect parts;
d. water seepage treatment
If the water seepage of the welding seam and the construction seam is found in the inspection process, marking the seepage position, well recording, analyzing the reason caused by the seepage and determining a leaking stoppage treatment scheme; and then opening the gate valve to continue precipitation, reducing the water level and water pressure of the basement, reducing the influence of the basement on plugging operation, then treating the water seepage part according to the concrete seepage severity by selecting a rapid-setting type plugging king or a grouting type high-permeability modified epoxy resin plugging agent plugging measure, closing the gate valve again to check after all the steps are finished, and ensuring that no seepage phenomenon exists so as to plug the concrete in the steel pipe and complete the seepage detection of the foundation pit bottom plate precipitation well plugging device.
The construction method for detecting leakage by using the foundation pit bottom plate dewatering well plugging device can be further realized by adopting the following technical measures.
The method of the preceding, wherein the steel pipe is a seamless steel pipe.
In the method, the specification of the pumping steel pipe is not less than DN32 steel pipe.
In the method, the water-stopping wing ring is a steel plate with the width of more than or equal to 100 mm.
In the method, the water stop wing ring is a steel plate with the thickness of more than or equal to 8 mm.
In the above method, each of the two water stop wing ring steel plates is perpendicular to the steel pipe axis.
In the method, the bottom support is a support seat for plugging the lower surface of the steel plate by the steel bar heads arranged at equal intervals.
The method can also be effectively applied to leakage inspection which is carried out in advance on underground structures of subway projects, comprehensive pipe galleries and industrial water pools with waterproof requirements.
After the technical scheme is adopted, the construction method for detecting the leakage by using the foundation pit bottom plate dewatering well plugging device has the following advantages:
1. the device has simple structure, convenient manufacture, reasonable design of detection process and convenient operation;
2. the construction quality is safe and reliable, whether the underground structure, the construction joint, the plugging position of the precipitation well and the like have leakage can be conveniently checked in advance, and the leakage position plugging treatment can be carried out on all the water leakage positions by using the precipitation well to continuously reduce the precipitation and pressure in advance, so that the structure plugging quality is ensured;
3. the requirements of building use functions and design of waterproof grade are met, construction cost is greatly saved, and engineering cost is reduced.
Drawings
Fig. 1 is a schematic view of a plugging structure of a foundation pit floor dewatering well according to an embodiment of the invention.
In the figure: 1 water pump drinking-water pipe, 2 shutoff steel sheets, 3 steel pipes, 4 stagnant water wing rings, 5 electric wire sleeve pipes, 6 end caps, 7 gate valves, 8 steel pipes that draw water, 9 collet, 10 foundation ditch bottom plates, 11 sealed oleamen, 12 immersible pumps, 13 drain pipes, 14 basements, 15 wall bushing, 16 basement bottom plates, 17 basement outer walls, 18 basement wall construction joints.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1
The invention discloses a construction method for detecting leakage by using a foundation pit bottom plate dewatering well plugging device, which comprises the following steps of:
1. and (5) installing a steel pipe plugging device.
Referring to fig. 1, fig. 1 is a schematic view of a plugging structure of a foundation pit floor dewatering well according to an embodiment of the present invention. As shown in the figure, the diameter of the steel pipe of the plugging device is selected according to the thickness of a foundation pit bottom plate, the diameter of a concrete well pipe of a dewatering well on the lower portion of the bottom plate, 600mm and the like through the steel pipe 3, the seamless steel pipe with the diameter of 600mm, the thickness of 10mm and the length of 500mm is selected for the steel pipe, two steel water stop wing rings 4 are arranged on the outer side of the steel pipe, and steel bar heads are welded on the inner side of the steel pipe at equal intervals from the. The bottom of the steel pipe is provided with a 10 mm-thick sealing steel plate 2 equal to the inner diameter of the steel pipe, the middle part of the steel plate is welded with a DN75 water pump pumping pipe 1 and a DN25 wire casing pipe 5, the top of the steel pipe is provided with a gate valve 7, and the bottom of the steel pipe is connected with a soft water belt and a submersible pump 12. The whole plugging device can be pre-buried when the bottom plate is poured or pre-buried in the later stage of a remaining construction joint. The specification of the water pumping steel pipe is DN32 steel pipe. The water-stopping wing ring is a steel plate with the width of 100 mm. The water-stopping wing ring is a steel plate with the thickness of 8 mm. The two water stop wing ring steel plates are respectively vertical to the axis of the steel pipe. The bottom support is a supporting seat used for plugging the lower surface of the steel plate by reinforcing steel bar heads arranged at equal intervals.
2. Satisfy the shutoff condition after, put into steel pipe 3 with the water pump together with water pump drinking-water pipe 1, shutoff steel sheet 2 to guarantee that the shutoff steel sheet steadily lays on the collet, use the immersible pump to last precipitation, make water discharge through drain pipe 13, guarantee that the water level remains a definite position under the shutoff steel sheet in the precipitation well all the time, do not influence its normal welding. And (3) performing full-length welding on the steel pipe and the blocking steel plate after the welding position is wiped by using a dry towel, wherein the leg height of a fillet weld meets the standard requirement, and quality defects such as meat biting, slag inclusion and the like cannot occur.
3. Stopping precipitation after the welding is finished, closing the gate valve 7 and installing the finished wire sleeve plug 6; at the moment, the underground water level will rise continuously, the water pressure is increased continuously, and the inside of the basement 14 is subjected to comprehensive leakage inspection immediately, particularly the parts of the construction joints of the basement outer wall 18, the positions of the wall bushing 15, the basement bottom plate 16, the basement outer wall 17, the tie bolt rod, the plugging position of the dewatering well, the concrete leakage defect and the like which are easy to occur leakage points in the engineering.
4. If water seepage occurs in the welding seam, the construction seam and the like in the inspection process, the leakage position can be marked and recorded, the reason caused by leakage is analyzed, and the leakage stoppage treatment scheme is determined. And then opening the gate valve to continuously reduce the water level and the water pressure of the basement, reducing the influence of the basement on the plugging operation, then treating the water seepage part according to the concrete seepage severity by selecting a rapid-hardening type plugging king or a grouting type high-permeability modified epoxy resin plugging agent plugging measure, closing the gate valve again for inspection after all the water seepage parts are finished, and ensuring that the concrete inside the steel pipe can be plugged without any seepage phenomenon, wherein the observation time is not less than 7 days.
The construction method for detecting leakage by using the foundation pit bottom plate dewatering well plugging device is not limited to building basements, and can be effectively applied to underground structures with waterproof requirements such as subway engineering, comprehensive pipe galleries, industrial pools and the like to check leakage in advance and eliminate hidden water leakage hazards, so that the underground structures can meet the requirements of building use functions and design waterproof grades.
The construction method for detecting leakage by using the foundation pit floor dewatering well plugging device has the advantages that whether the leakage phenomenon exists in the underground structure, the construction joint, the dewatering well plugging part and the like can be known more conveniently in advance, the leakage position plugging treatment can be carried out on all the water leakage parts by using the dewatering well to continuously reduce the water and pressure in advance, the structure plugging quality is ensured, the requirements of building use functions and design water-proof grades are met, the process is convenient, the one-time plugging qualified rate effect is guaranteed to be excellent, and the cost is greatly saved.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.
Claims (8)
1. A construction method for detecting leakage by using a foundation pit bottom plate dewatering well plugging device is characterized by comprising the following steps:
a. installation steel pipe plugging device
Selecting the diameter of a steel pipe of the plugging device according to the thickness of a foundation pit bottom plate and the diameter of a concrete well pipe of a dewatering well at the lower part of the bottom plate, wherein the diameter of the steel pipe is larger than or equal to 600mm, the thickness of the steel pipe is larger than or equal to 10mm, and the length of the steel pipe is 500mm, and two steel water stop wing rings are arranged on the outer side of the steel; welding reinforcing steel bar heads at equal intervals from the bottom of the inner side of the steel pipe to serve as a bottom support of a plugging steel plate, arranging the plugging steel plate with the same inner diameter as the steel pipe at the bottom of the steel pipe, welding a water pump water pumping pipe and a wire sleeve at the middle part of the plugging steel plate, arranging a gate valve at the top of the steel pipe, and connecting the bottom of the steel pipe with a water pump by adopting a soft water hose; the whole steel pipe plugging device can be pre-buried when a bottom plate is poured or pre-buried in the later stage of a remaining construction joint;
b. plugging device using steel pipe
After the plugging condition is met, the water pump steel pipe and the plugging steel plate are placed into the steel pipe together, the plugging steel plate is guaranteed to be stably placed on the bottom support, and the water pump is used for continuously reducing the water; the water level in the precipitation well is always kept at a certain position below the plugging steel plate, and normal welding of the plugging steel plate is not influenced; performing full-length welding on the steel pipe and the blocking steel plate after wiping the welding position by using a dry towel, wherein the height of a fillet weld leg meets the standard requirement, and the quality defects of meat biting and slag inclusion cannot occur;
c. leak inspection
Stopping precipitation after the welding is finished, closing the gate valve and installing a finished wire sleeve plug; at the moment, the underground water level will be continuously raised, the water pressure is continuously increased, and the interior of the basement is immediately subjected to comprehensive leakage inspection, particularly the parts where leakage points are easy to appear in engineering, including the construction joints of the external wall of the basement, the positions of the wall-penetrating sleeves, the positions of the tie bolt rods, the plugging positions of dewatering wells and the concrete leakage vibration defect parts;
d. water seepage treatment
If the water seepage of the welding seam and the construction seam is found in the inspection process, marking the seepage position, well recording, analyzing the reason caused by the seepage and determining a leaking stoppage treatment scheme; and then opening the gate valve to continue precipitation, reducing the water level and water pressure of the basement, reducing the influence of the basement on plugging operation, then treating the water seepage part according to the concrete seepage severity by selecting a rapid-setting type plugging king or a grouting type high-permeability modified epoxy resin plugging agent plugging measure, closing the gate valve again to check after all the steps are finished, and ensuring that no seepage phenomenon exists so as to plug the concrete in the steel pipe and complete the seepage detection of the foundation pit bottom plate precipitation well plugging device.
2. The construction method for detecting the leakage by using the foundation pit floor dewatering well plugging device according to claim 1, wherein the steel pipe is a seamless steel pipe.
3. The construction method for detecting the leakage by using the foundation pit floor dewatering well plugging device according to claim 1, wherein the specification of the pumping steel pipe is equal to or larger than DN32 steel pipe.
4. The construction method for detecting the leakage by using the foundation pit floor dewatering well plugging device according to claim 1, wherein the water stopping wing ring is a steel plate with the width of more than or equal to 100 mm.
5. The construction method for detecting the leakage by using the foundation pit floor dewatering well plugging device according to claim 1, wherein the water stopping wing ring is a steel plate with the thickness of more than or equal to 8 mm.
6. The construction method for detecting the leakage by using the foundation pit floor dewatering well plugging device according to claim 1, wherein the two water stop wing ring steel plates are perpendicular to the steel pipe axis.
7. The construction method for detecting the leakage by using the plugging device for the dewatering well of the foundation pit floor as claimed in claim 1, wherein the bottom support is provided with equally spaced reinforcing heads as a support seat for plugging the lower surface of the steel plate.
8. The construction method for detecting the leakage by using the foundation pit floor dewatering well plugging device according to claim 1, is further effectively applied to leakage inspection performed in advance on underground structures of subway projects, comprehensive pipe galleries and industrial pools with waterproof requirements.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411588A (en) * | 2020-11-10 | 2021-02-26 | 上海建工七建集团有限公司 | Water seepage prevention device for dewatering well and construction method |
| CN114457831A (en) * | 2022-01-19 | 2022-05-10 | 中天建设集团有限公司 | Integral steel formwork leakage blocking device in foundation pit and construction method |
| CN114703878A (en) * | 2022-05-07 | 2022-07-05 | 中建八局第二建设有限公司 | Plugging and draining device for dewatering well and construction method |
| CN114718099A (en) * | 2022-03-21 | 2022-07-08 | 中国五冶集团有限公司 | Well plugging device for dewatering well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4298294A (en) * | 1979-03-26 | 1981-11-03 | Zimmerman C Lyle | Basement dewatering system |
| JP2006328894A (en) * | 2005-05-30 | 2006-12-07 | Nakamura Doboku Kk | Construction method of underground structure |
| CN102345301A (en) * | 2011-07-08 | 2012-02-08 | 天津二十冶建设有限公司 | New method for plugging dewatering well in basement |
| CN104711994A (en) * | 2015-01-27 | 2015-06-17 | 江苏省华建建设股份有限公司 | Foundation pit deep well rainfall and plugging construction method |
| CN205296346U (en) * | 2016-01-11 | 2016-06-08 | 许昌水利建筑工程有限公司 | Sewer line air supply precipitation structure |
| CN207193996U (en) * | 2017-08-31 | 2018-04-06 | 中国一冶集团有限公司 | A kind of precipitation pipe well well-sealing device |
| CN110725341A (en) * | 2019-10-25 | 2020-01-24 | 浙江绿城房屋服务系统有限公司 | Basement outer wall embedded sleeve and pipeline gap leakage treatment method |
-
2020
- 2020-04-15 CN CN202010295597.2A patent/CN111501858A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4298294A (en) * | 1979-03-26 | 1981-11-03 | Zimmerman C Lyle | Basement dewatering system |
| JP2006328894A (en) * | 2005-05-30 | 2006-12-07 | Nakamura Doboku Kk | Construction method of underground structure |
| CN102345301A (en) * | 2011-07-08 | 2012-02-08 | 天津二十冶建设有限公司 | New method for plugging dewatering well in basement |
| CN104711994A (en) * | 2015-01-27 | 2015-06-17 | 江苏省华建建设股份有限公司 | Foundation pit deep well rainfall and plugging construction method |
| CN205296346U (en) * | 2016-01-11 | 2016-06-08 | 许昌水利建筑工程有限公司 | Sewer line air supply precipitation structure |
| CN207193996U (en) * | 2017-08-31 | 2018-04-06 | 中国一冶集团有限公司 | A kind of precipitation pipe well well-sealing device |
| CN110725341A (en) * | 2019-10-25 | 2020-01-24 | 浙江绿城房屋服务系统有限公司 | Basement outer wall embedded sleeve and pipeline gap leakage treatment method |
Non-Patent Citations (1)
| Title |
|---|
| 王明艳等: "深基坑大水量降水井封堵施工技术", 《科技视界》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411588A (en) * | 2020-11-10 | 2021-02-26 | 上海建工七建集团有限公司 | Water seepage prevention device for dewatering well and construction method |
| CN114457831A (en) * | 2022-01-19 | 2022-05-10 | 中天建设集团有限公司 | Integral steel formwork leakage blocking device in foundation pit and construction method |
| CN114457831B (en) * | 2022-01-19 | 2024-03-12 | 中天建设集团有限公司 | Integral steel template plugging device in foundation pit and construction method |
| CN114718099A (en) * | 2022-03-21 | 2022-07-08 | 中国五冶集团有限公司 | Well plugging device for dewatering well |
| CN114703878A (en) * | 2022-05-07 | 2022-07-05 | 中建八局第二建设有限公司 | Plugging and draining device for dewatering well and construction method |
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Application publication date: 20200807 |