CN113944179B - Construction method of pumping drainage dewatering structure of existing basement - Google Patents
Construction method of pumping drainage dewatering structure of existing basement Download PDFInfo
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- CN113944179B CN113944179B CN202111279186.5A CN202111279186A CN113944179B CN 113944179 B CN113944179 B CN 113944179B CN 202111279186 A CN202111279186 A CN 202111279186A CN 113944179 B CN113944179 B CN 113944179B
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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Abstract
The invention discloses a construction method of an existing basement drainage dewatering structure, which belongs to the technical field of basement dewatering construction, and is based on the construction method of the existing basement drainage dewatering structure for controlling drainage of groundwater, and comprises the following steps: building a pumping drainage dewatering structure; flow calibration test; automatic control of the reverse flushing device; and (5) dewatering and automatic construction. The pumping drainage dewatering structure comprises a well pipe, a fixer, a reverse flushing device, a flange, a control valve, a pressure gauge, a booster pump and a drainage system; the well pipe is connected with the reverse flushing device through a flange, filter materials are filled in the well pipe, and a filter screen is arranged in the flange between the well pipe and the reverse flushing device. According to the invention, by arranging the reverse dredging device, the booster pump, the pressure gauge and other facilities, the high water level of the existing basement is actively pumped and discharged, so that the water level of the basement can be effectively reduced, and the loss of fine particles is prevented.
Description
Technical Field
The invention relates to the technical field of basement dewatering construction, in particular to a construction method of an existing basement drainage dewatering structure.
Background
With the rapid growth of national economy, land is becoming more scarce, and development and utilization of underground space are becoming more common and important. At present, a large number of buildings in China are provided with basements as garages, storerooms and the like, even underground houses, underground supermarkets and the like, and in order to ensure the safety of the basements and the dry and healthy environment, the waterproof drainage of the basements becomes an important task in the design and construction of the basements.
Since the outer wall and the bottom plate of the basement are both positioned below the ground and are often corroded by groundwater, water and moisture protection measures are an important item in the design of basement structures. Existing techniques for preventing moisture and water in basements are typically used to prevent water from penetrating the floor of the basement by laying waterproof materials. However, in a basement with excessive water, the effect of preventing water seepage is poor only through waterproof materials, the basement is still in a very humid state, and when groundwater is accumulated outside the concrete side wall, larger water pressure is generated between the basement and the concrete side wall, so that the water seepage phenomenon of the basement occurs due to the overlarge external water pressure. Therefore, in order to ensure the dry environment of the existing basement, the water body around the basement needs to be pumped and discharged, so the invention provides a construction method of the pumping and discharging dewatering structure of the existing basement.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a construction method of the pumping and dewatering structure of the existing basement, and overcomes the defects in the prior art. By arranging the reverse flushing device, the booster pump, the pressure gauge and other facilities, the high water level of the existing basement is actively pumped and discharged, the water level of the basement can be effectively reduced, and fine particles are prevented from losing.
The construction method for controlling drainage of the groundwater based on the existing basement drainage dewatering structure is characterized by comprising the following steps:
step 1: building a pumping drainage dewatering structure;
the pumping drainage dewatering structure comprises a well pipe, a fixer, a reverse flushing device, a flange, a control valve, a pressure gauge, a booster pump and a drainage system; the well pipe is connected with the reverse dredging device through a flange, and the pipe well is filled with filter materials; a vertical pipeline, a bending pipeline and a horizontal pipeline are connected between the reverse flushing device and the booster pump; the vertical pipeline and the bending pipeline and the horizontal pipeline are connected through flanges; a horizontal pipeline and a flange are connected between the booster pump and the drainage system; the reverse flushing device is provided with a pressure gauge, a flowmeter, a control valve and a reverse flushing valve; a filter screen is arranged in the flange between the well pipe and the reverse flushing device; the pipe well is connected with the surface of the bottom plate in the water collecting pit through an expansion bolt, the upper part of the fixer is a flange chassis, the lower part of the fixer is of a wedge-shaped hollow structure and is nested outside the pipe well, the upper part of the fixer is connected with the bottom plate in the water collecting pit through the expansion bolt, and the outer surface of the lower part of the fixer is provided with a waterproof rubber pad;
step 2: flow calibration test;
testing the pumping drainage dewatering structure, and replacing filter materials in the pipe well before each test; pumping water with different pressures and different flows at the bottom of the pipe well, and monitoring the water flow in the reverse flushing device by adopting a flowmeter in the process to obtain a corresponding relation data set A of the pumping water pressure and the monitored water flow in an initial state;
step 3: automatic control of the reverse flushing device;
the control valve in the reverse flushing device is kept in a closed state, and when the pressure monitored by the pressure gauge is greater than or equal to the pressure relief early warning value, the control valve is opened, and the flow of water in the reverse flushing device is continuously monitored by the flow meter; taking the pressure monitored by a pressure gauge at the moment of opening the control valve as a reference pressure, and referring to a data set A, obtaining a reference water flow corresponding to the reference pressure; if the initial water flow after the control valve is opened is greater than or equal to 50% of the reference water flow, the existing state is kept unchanged; if the initial water flow after the control valve is opened is less than 50% of the reference water flow, performing reverse flushing operation, closing the control valve, opening the reverse flushing valve, and closing the reverse flushing valve after the high-pressure water is adopted to perform reverse flushing on the well pipe for a set time; if the pressure gauge is continuously smaller than the pressure relief early warning value, carrying out 1 reverse flushing operation on the well pipe for no more than 30 days;
step 4: automatic construction of drainage water;
mode one: when the pressure monitored by the pressure gauge is smaller than the pressure relief early warning value, a control valve in the reverse flushing device is kept in a closed state; when the pressure monitored by the pressure gauge is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flow meter is smaller than the drainage early warning value, the control valve is opened, and the groundwater is kept to be discharged through the drainage system in a self-flowing mode;
mode two: when the pressure monitored by the pressure gauge is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flow meter is smaller than the drainage early warning value, the control valve is opened to keep the groundwater self-flowing and discharging;
mode three: when the pressure monitored by the pressure gauge is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flowmeter is greater than or equal to the drainage early warning value, the control valve is opened, and meanwhile, the booster pump is opened to enable underground water to be discharged in an accelerating mode;
the drainage and precipitation structure freely switches the three modes according to the pressure value monitored by the pressure gauge and the water flow value monitored by the flow meter and the rule of automatic construction in the step, so that the underground water is effectively drained.
Preferably, the pressure relief early warning value is 0.5MPa-1.0MPa.
Preferably, the drainage early warning value is 100L/min-200L/min.
Preferably, the reverse flushing set time in the step 3 is in the range of 5min-30min.
Preferably, the control valve is arranged at the upper part of the back flushing valve, and the pressure gauge and the flow meter are both arranged at the upper part of the back flushing valve and at the lower part of the control valve.
The invention has the beneficial technical effects that:
by arranging facilities such as a reverse flushing device, a booster pump, a pressure gauge and the like, the high water level of the existing basement is actively pumped and discharged, so that the water level of the basement can be effectively reduced, and fine particles are prevented from losing; by arranging a pressure gauge, the water pressure can be measured; the pumping and exhausting can be boosted by arranging the booster pump; the filter screen is arranged, so that filtering can be performed; by arranging the reverse dredging device, the dredging can be performed reversely; by providing a drainage system, the amount of water can be metered.
Drawings
Fig. 1 is a schematic diagram of a drainage dewatering structure in a construction method of a drainage dewatering structure of an existing basement.
Fig. 2 is a construction flow chart of a construction method of a pumping and dewatering structure of an existing basement.
Wherein, 1-bottom plate, 2-well pipe, 3-fixer, 4-reverse silt flushing device, 5-flange, 6-control valve, 7-manometer, 8-booster pump, 9-drainage system, 10-sump.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
example 1:
as shown in fig. 1 and 2, the construction method for controlling drainage of groundwater based on the existing basement drainage dewatering structure comprises the following steps:
step 1: building a pumping drainage dewatering structure;
the pumping drainage dewatering structure comprises a well pipe 2, a fixer 3, a reverse flushing device 4, a flange 5, a control valve 6, a pressure gauge 7, a booster pump 8 and a drainage system 9; the well pipe 2 is connected with the reverse flushing device 4 through a flange 5, and the pipe well is filled with filter materials; a vertical pipeline, a bending pipeline and a horizontal pipeline are connected between the reverse flushing device 4 and the booster pump 8; the vertical pipeline and the bending pipeline and the horizontal pipeline are connected through a flange 5; a horizontal pipeline and a flange 5 are connected between the booster pump 8 and the drainage system 9; the reverse flushing device 4 is provided with a pressure gauge 7, a flowmeter, a control valve 6 and a reverse flushing valve; a filter screen is arranged in the flange 5 between the well pipe 2 and the reverse flushing device 4; the pipe well is connected with the surface of the bottom plate 1 in the water collecting pit 10 through expansion bolts, a fixer 3 is arranged at the joint of the pipe well and the surface of the bottom plate 1 in the water collecting pit 10, a flange 5 chassis is arranged at the upper part of the fixer 3, a wedge-shaped hollow structure is arranged at the lower part of the fixer 3, the fixer is nested outside the pipe well, the upper part of the fixer 3 is connected with the bottom plate 1 in the water collecting pit 10 through expansion bolts, and a waterproof rubber pad is arranged on the outer surface of the lower part of the fixer 3;
step 2: flow calibration test;
testing the pumping drainage dewatering structure, and replacing filter materials in the pipe well before each test; pumping water with different pressures and different flows at the bottom of the pipe well, monitoring the water flow in the reverse flushing device 4 by adopting a flowmeter in the process, and acquiring a corresponding relation data set A of the pumping water pressure and the monitored water flow in an initial state;
step 3: the reverse flushing device 4 is automatically controlled;
the control valve 6 in the reverse flushing device 4 is kept in a closed state, when the pressure monitored by the pressure gauge 7 is greater than or equal to the pressure relief early warning value, the control valve 6 is opened, and a flowmeter is adopted to continuously monitor the water flow in the reverse flushing device 4; taking the pressure monitored by the pressure gauge 7 at the moment of opening the control valve 6 as a reference pressure, and referring to the data set A, obtaining a reference water flow corresponding to the reference pressure; if the initial water flow after the control valve 6 is opened is greater than or equal to 50% of the reference water flow, the existing state is kept unchanged; if the initial water flow after the control valve 6 is opened is less than 50% of the reference water flow, performing reverse flushing operation, closing the control valve 6, opening the reverse flushing valve, and closing the reverse flushing valve after the reverse flushing of the well pipe 2 is performed for a set time by adopting high-pressure water; if the pressure gauge 7 is continuously smaller than the pressure relief early warning value, carrying out reverse flushing operation on the well pipe 2 for 1 time without more than 30 days;
step 4: automatic construction of drainage water;
mode one: when the pressure detected by the pressure gauge 7 is smaller than the pressure relief early warning value, the control valve 6 in the reverse flushing device 4 is kept in a closed state; when the pressure monitored by the pressure gauge 7 is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flow meter is smaller than the drainage early warning value, the control valve 6 is opened, and the groundwater is kept to be discharged through the drainage system 9 in a self-flowing manner;
mode two: when the pressure monitored by the pressure gauge 7 is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flow meter is smaller than the drainage early warning value, the control valve 6 is opened, and the self-flowing discharge of the underground water is kept;
mode three: when the pressure monitored by the pressure gauge 7 is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flowmeter is greater than or equal to the drainage early warning value, the control valve 6 is opened, and meanwhile, the booster pump 8 is opened, so that the groundwater is discharged in an accelerating mode;
the dewatering structure freely switches the three modes according to the pressure value monitored by the pressure gauge 7 and the water flow value monitored by the flow meter and the rule of automatic construction in the step, so that the underground water is effectively discharged.
Preferably, the pressure relief early warning value is 1.0MPa.
Preferably, the drainage early warning value is 200L/min.
Preferably, the reverse flushing set time range in the step 3 is 30min.
Preferably, the control valve 6 is arranged at the upper part of the back flushing valve, and the pressure gauge 7 and the flow meter are both arranged at the upper part of the back flushing valve and at the lower part of the control valve 6.
Example 2:
when the water permeable layer is arranged below the bottom plate 1 in the existing basement, a water collecting pit 10 is formed by opening holes in the bottom plate 1, a drainage dewatering structure is installed in the water collecting pit 10, and the construction is carried out by adopting the following steps:
step 1: building a pumping drainage dewatering structure;
the pumping drainage dewatering structure comprises a well pipe 2, a fixer 3, a reverse flushing device 4, a flange 5, a control valve 6, a pressure gauge 7, a booster pump 8 and a drainage system 9; the well pipe 2 is connected with the reverse flushing device 4 through a flange 5, and the pipe well is filled with filter materials; a vertical pipeline, a bending pipeline and a horizontal pipeline are connected between the reverse flushing device 4 and the booster pump 8; the vertical pipeline and the bending pipeline and the horizontal pipeline are connected through a flange 5; a horizontal pipeline and a flange 5 are connected between the booster pump 8 and the drainage system 9; the reverse flushing device 4 is provided with a pressure gauge 7, a flowmeter, a control valve 6 and a reverse flushing valve; a filter screen is arranged in the flange 5 between the well pipe 2 and the reverse flushing device 4; the pipe well is connected with the surface of the bottom plate 1 in the water collecting pit 10 through expansion bolts, a fixer 3 is arranged at the joint of the pipe well and the surface of the bottom plate 1 in the water collecting pit 10, a flange 5 chassis is arranged at the upper part of the fixer 3, a wedge-shaped hollow structure is arranged at the lower part of the fixer 3, the fixer is nested outside the pipe well, the upper part of the fixer 3 is connected with the bottom plate 1 in the water collecting pit 10 through expansion bolts, and a waterproof rubber pad is arranged on the outer surface of the lower part of the fixer 3;
step 2: flow calibration test;
testing the pumping drainage dewatering structure, and replacing filter materials in the pipe well before each test; pumping water with different pressures and different flows at the bottom of the pipe well, monitoring the water flow in the reverse flushing device 4 by adopting a flowmeter in the process, and acquiring a corresponding relation data set A of the pumping water pressure and the monitored water flow in an initial state;
step 3: the reverse flushing device 4 is automatically controlled;
the control valve 6 in the reverse flushing device 4 is kept in a closed state, when the pressure monitored by the pressure gauge 7 is greater than or equal to the pressure relief early warning value, the control valve 6 is opened, and a flowmeter is adopted to continuously monitor the water flow in the reverse flushing device 4; taking the pressure monitored by the pressure gauge 7 at the moment of opening the control valve 6 as a reference pressure, and referring to the data set A, obtaining a reference water flow corresponding to the reference pressure; if the initial water flow after the control valve 6 is opened is greater than or equal to 50% of the reference water flow, the existing state is kept unchanged; if the initial water flow after the control valve 6 is opened is less than 50% of the reference water flow, performing reverse flushing operation, closing the control valve 6, opening the reverse flushing valve, and closing the reverse flushing valve after the reverse flushing of the well pipe 2 is performed for a set time by adopting high-pressure water; if the pressure gauge 7 is continuously smaller than the pressure relief early warning value, carrying out reverse flushing operation on the well pipe 2 for 1 time without more than 30 days;
step 4: automatic construction of drainage water;
mode one: when the pressure detected by the pressure gauge 7 is smaller than the pressure relief early warning value, the control valve 6 in the reverse flushing device 4 is kept in a closed state; when the pressure monitored by the pressure gauge 7 is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flow meter is smaller than the drainage early warning value, the control valve 6 is opened, and the groundwater is kept to be discharged through the drainage system 9 in a self-flowing manner;
mode two: when the pressure monitored by the pressure gauge 7 is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flow meter is smaller than the drainage early warning value, the control valve 6 is opened, and the self-flowing discharge of the underground water is kept;
mode three: when the pressure monitored by the pressure gauge 7 is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flowmeter is greater than or equal to the drainage early warning value, the control valve 6 is opened, and meanwhile, the booster pump 8 is opened, so that the groundwater is discharged in an accelerating mode;
the dewatering structure freely switches the three modes according to the pressure value monitored by the pressure gauge 7 and the water flow value monitored by the flow meter and the rule of automatic construction in the step, so that the underground water is effectively discharged.
Preferably, the pressure relief early warning value is 0.5MPa.
Preferably, the drainage early warning value is 100L/min.
Preferably, the reverse flushing set time range in the step 3 is 10min.
Preferably, the control valve 6 is arranged at the upper part of the back flushing valve, and the pressure gauge 7 and the flow meter are both arranged at the upper part of the back flushing valve and at the lower part of the control valve 6.
The invention relates to a construction method of an existing basement drainage dewatering structure, which realizes active drainage of high water level of the existing basement by arranging a reverse flushing device, a booster pump, a pressure gauge and other facilities, can effectively reduce the water level of the basement and ensures that fine particles are not lost; by arranging a pressure gauge, the water pressure can be measured; the pumping and exhausting can be boosted by arranging the booster pump; the filter screen is arranged, so that filtering can be performed; by arranging the reverse dredging device, the dredging can be performed reversely; by providing a drainage system, the amount of water can be metered.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that other variations, modifications, additions and substitutions are possible, without departing from the scope of the invention as disclosed in the accompanying claims.
Claims (4)
1. The construction method for controlling drainage of the groundwater based on the existing basement drainage dewatering structure is characterized by comprising the following steps:
step 1: building a pumping drainage dewatering structure;
the pumping drainage dewatering structure comprises a well pipe, a fixer, a reverse flushing device, a flange, a control valve, a pressure gauge, a booster pump and a drainage system; the well pipe is connected with the reverse dredging device through a flange, and the pipe well is filled with filter materials; a vertical pipeline, a bending pipeline and a horizontal pipeline are connected between the reverse flushing device and the booster pump; the vertical pipeline and the bending pipeline and the horizontal pipeline are connected through flanges; a horizontal pipeline and a flange are connected between the booster pump and the drainage system; the reverse flushing device is provided with a pressure gauge, a flowmeter, a control valve and a reverse flushing valve; a filter screen is arranged in the flange between the well pipe and the reverse flushing device; the pipe well is connected with the surface of the bottom plate in the water collecting pit through an expansion bolt, the upper part of the fixer is a flange chassis, the lower part of the fixer is of a wedge-shaped hollow structure and is nested outside the pipe well, the upper part of the fixer is connected with the bottom plate in the water collecting pit through the expansion bolt, and the outer surface of the lower part of the fixer is provided with a waterproof rubber pad;
step 2: flow calibration test;
testing the pumping drainage dewatering structure, and replacing filter materials in the pipe well before each test; pumping water with different pressures and different flows at the bottom of the pipe well, and monitoring the water flow in the reverse flushing device by adopting a flowmeter in the process to obtain a corresponding relation data set A of the pumping water pressure and the monitored water flow in an initial state;
step 3: automatic control of the reverse flushing device;
the control valve in the reverse flushing device is kept in a closed state, and when the pressure monitored by the pressure gauge is greater than or equal to the pressure relief early warning value, the control valve is opened, and the flow of water in the reverse flushing device is continuously monitored by the flow meter; taking the pressure monitored by a pressure gauge at the moment of opening the control valve as a reference pressure, and referring to a data set A, obtaining a reference water flow corresponding to the reference pressure; if the initial water flow after the control valve is opened is greater than or equal to 50% of the reference water flow, the existing state is kept unchanged; if the initial water flow after the control valve is opened is less than 50% of the reference water flow, performing reverse flushing operation, closing the control valve, opening the reverse flushing valve, and closing the reverse flushing valve after the high-pressure water is adopted to perform reverse flushing on the well pipe for a set time; if the pressure gauge is continuously smaller than the pressure relief early warning value, carrying out 1 reverse flushing operation on the well pipe for no more than 30 days; the pressure relief early warning value is 0.5MPa-1.0 MPa;
step 4: automatic construction of drainage water;
mode one: when the pressure monitored by the pressure gauge is smaller than the pressure relief early warning value, a control valve in the reverse flushing device is kept in a closed state;
mode two: when the pressure monitored by the pressure gauge is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flow meter is smaller than the drainage early warning value, the control valve is opened to keep the groundwater self-flowing and discharging;
mode three: when the pressure monitored by the pressure gauge is greater than or equal to the pressure relief early warning value, and the water flow monitored by the flowmeter is greater than or equal to the drainage early warning value, the control valve is opened, and meanwhile, the booster pump is opened to enable underground water to be discharged in an accelerating mode; the drainage and precipitation structure freely switches the three modes according to the pressure value monitored by the pressure gauge and the water flow value monitored by the flow meter and the rule of automatic construction in the step, so that the underground water is effectively drained.
2. The construction method of the pumping and dewatering structure of the existing basement according to claim 1, wherein the drainage early-warning value is 100-200L/min.
3. The construction method of the pumping and dewatering structure of the existing basement according to claim 1, wherein the reverse flushing set time in the step 3 ranges from 5min to 30min.
4. The construction method of the pumping and dewatering structure of the existing basement according to claim 1, wherein the control valve is arranged at the upper part of the reverse flushing valve, and the pressure gauge and the flow meter are both arranged at the upper part of the reverse flushing valve and at the lower part of the control valve.
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| CN101736804B (en) * | 2009-12-22 | 2011-04-27 | 浙江大学 | Refuse landfill percolate pump drainage minor-caliber shaft structure and silt prevention method |
| KR20120105192A (en) * | 2011-03-15 | 2012-09-25 | 주식회사 선진엔지니어링 종합건축사 사무소 | Drainage system construction method |
| CN103061351B (en) * | 2012-12-24 | 2015-08-26 | 华蓝设计（集团）有限公司 | Prevent the device that basement bottom board swells, seeps water |
| CN205530386U (en) * | 2016-03-21 | 2016-08-31 | 上海长凯岩土工程有限公司 | Water pressure control system for underground works with outlet pipe |
| CN105625483B (en) * | 2016-03-21 | 2017-11-21 | 上海长凯岩土工程有限公司 | A kind of underground engineering hydraulic pressure control method |
| CN112523271A (en) * | 2020-11-13 | 2021-03-19 | 中国建筑西南勘察设计研究院有限公司 | Pressure-controlled intelligent drainage pressure relief device and drainage pressure relief method thereof |
| CN213979070U (en) * | 2020-11-24 | 2021-08-17 | 广西有色勘察设计研究院 | Basement pressure relief device that lets out water |
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