CN110820776A - Siphon drainage system for blind ditch of foundation pit - Google Patents
Siphon drainage system for blind ditch of foundation pit Download PDFInfo
- Publication number
- CN110820776A CN110820776A CN201911129306.6A CN201911129306A CN110820776A CN 110820776 A CN110820776 A CN 110820776A CN 201911129306 A CN201911129306 A CN 201911129306A CN 110820776 A CN110820776 A CN 110820776A
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- water
- drainage
- pit
- bottom plate
- water collecting
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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
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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
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/20—Siphon pipes or inverted siphons
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/22—Adaptations of pumping plants for lifting sewage
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention relates to a siphon drainage system for a blind ditch of a foundation pit, which comprises a basement outer wall arranged in a step-shaped deep foundation pit, drainage blind ditches arranged around the outer side of the basement outer wall, wherein the drainage blind ditches are communicated and fully distributed along the positions from a high bottom plate surface to a low bottom plate surface of the step-shaped foundation pit and close to the wall of the foundation pit, the drainage blind ditches on the low bottom plate surface are communicated to a water collecting pit, a self-sucking pump is arranged in the water collecting pit, and the self-sucking pump directly pumps water into a reservoir on the low ground; the method is suitable for excavating foundation pits with large excavation depth, high underground water level and complicated basement design in mountainous regions, and foundation pits with certain height difference or obvious height span.
Description
Technical Field
The invention relates to a siphon drainage system for a blind ditch of a foundation pit, in particular to depressurization drainage for a multi-step ultra-deep foundation pit.
Background
How to effectively satisfy the drainage of the foundation pit is the problem that the drainage of the foundation pit has to be considered under the condition of mountain land in China at present. However, the conventional substrate drainage method cannot achieve economical efficiency and effective drainage effect at a construction site. In order to solve the problem, research and use a pressure reduction and drainage construction measure of an ultra-deep foundation pit, and a concept of 'drainage combination' is fused to meet the requirement of underground water level buried depth and the step type height span formed in the excavation process of the foundation pit, so that the economic and effective drainage purpose is achieved.
Disclosure of Invention
The invention aims to overcome the defects, and provides a siphon drainage system for a blind ditch of a foundation pit, which is convenient for realizing unmanned sale.
The invention is realized by the following technical scheme:
a siphon drainage system for a blind ditch of a foundation pit comprises a basement outer wall arranged in a step-shaped deep foundation pit, drainage blind ditches arranged around the outer side of the basement outer wall, wherein the drainage blind ditches are communicated and fully distributed along the positions, close to the foundation pit wall, from a high bottom plate surface to a low bottom plate surface of the step-shaped foundation pit, the drainage blind ditches on the low bottom plate surface are communicated to a water collecting pit, a self-sucking pump is arranged in the water collecting pit, and the self-sucking pump directly sucks water into a reservoir on the low ground; the method is characterized in that: a one-way valve is arranged on a hose communicated between the water collecting pit and the reservoir; the drainage blind ditch comprises vertical drainage plates, a water collecting pipe, a gravel layer, a gravel cushion layer and a filter screen, wherein the vertical drainage plates are uniformly distributed along the length direction of the water collecting pipe, a water flow channel of the vertical drainage plates is communicated with the water collecting pipe, the filter screen wraps the water collecting pipe, the gravel layer is arranged on the outer side of the filter screen, and the gravel cushion layer is wrapped on the outer side of the gravel layer;
an intermediate water tank is arranged in the vertical drainage plate, the upper end of the intermediate water tank is communicated to the water collecting pipe through a communicating pipe, and a permeable film is arranged outside the intermediate water tank;
the surface of the water collecting pipe is provided with a plurality of water suction holes.
And a plastic elbow joint is arranged at the turning part of the water collecting pipe arranged along the step-shaped foundation pit.
The filter screen is geotechnical cloth material, the interval 50cm sets up between the hole that absorbs water.
The vertical water drainage pipe is made of plastic materials, and the middle water tank is in a through mode.
The vertical water drainage pipe is made of plastic materials, the middle water tank is in a non-through form, the cross section of the middle water tank is in a u shape, and the middle water tank is wrapped by the permeable film.
The buried depth of the vertical water drainage pipe is not less than 2 m.
And a heating rod is arranged in the middle water tank in a through mode, and a power supply of the heating rod is independently supplied with power.
The invention has the following advantages:
1. the method is suitable for excavating foundation pits with large excavation depth, high underground water level and complicated basement design in mountainous regions, and foundation pits with certain height difference or obvious height span.
2. The technology is simple and convenient to construct, has no potential safety hazard and quality defect, and accords with the people-oriented construction idea.
3. By applying the idea of 'combination of drainage and precipitation', the approximate elevation bottom plates are subjected to dewatering treatment, and the bottom plates with large elevation difference are subjected to drainage thought, so that the problem of difficult drainage of the basement under the mountain land condition is successfully solved.
4. The water pressure around the basement is reduced, the stress and leakage risk of the bottom plate are reduced, and the construction quality is guaranteed.
5. The quantity of the anti-floating piles can be reduced by reducing the underground water level, the construction progress of the basement is accelerated, and the construction investment is reduced.
6. The underground water is pumped to the site for construction, car washing, dust prevention, toilet flushing, plant irrigation and the like, so that the device is economical and environment-friendly.
Drawings
FIG. 1 is a schematic cross-sectional view of a blind trench according to the present invention.
Fig. 2 is a schematic plan view of the present invention.
FIG. 3 is a cross-sectional view of the present invention.
1-basement exterior wall, 2-basement bottom plate, 3-gravels soil, 4-coarse sand inverted filter, 5-pebble inverted filter, 6-PVC pipe, 7-water tank (6000mm (length) × 6000mm (width) × 2000mm (height)), 8-blind ditch, 9-deep foundation pit base, 10-high ground, 11-low ground, 12-water collecting pit (5000mm (length) × 5000mm (width) × 3000mm (height)), 13-diameter 200mm fire-fighting water pipe, 14-basement positive and negative top plate surface, 15-height span boundary.
Detailed Description
The invention will be better understood by the following description of embodiments thereof, but the applicant's specific embodiments are not intended to limit the invention to the particular embodiments shown, and any changes in the definition of parts or features and/or in the overall structure, not essential changes, are intended to define the scope of the invention.
A siphon drainage system for a blind ditch of a foundation pit comprises a basement outer wall arranged in a step-shaped deep foundation pit, drainage blind ditches arranged around the outer side of the basement outer wall, wherein the drainage blind ditches are communicated and fully distributed along the positions, close to the foundation pit wall, from a high bottom plate surface to a low bottom plate surface of the step-shaped foundation pit, the drainage blind ditches on the low bottom plate surface are communicated to a water collecting pit, a self-sucking pump is arranged in the water collecting pit, and the self-sucking pump directly sucks water into a reservoir on the low ground; the method is characterized in that: a one-way valve is arranged on a hose communicated between the water collecting pit and the reservoir; the drainage blind ditch comprises vertical drainage plates, a water collecting pipe, a gravel layer, a gravel cushion layer and a filter screen, wherein the vertical drainage plates are uniformly distributed along the length direction of the water collecting pipe, a water flow channel of the vertical drainage plates is communicated with the water collecting pipe, the filter screen wraps the water collecting pipe, the gravel layer is arranged on the outer side of the filter screen, and the gravel cushion layer is wrapped on the outer side of the gravel layer;
an intermediate water tank is arranged in the vertical drainage plate, the upper end of the intermediate water tank is communicated to the water collecting pipe through a communicating pipe, and a permeable film is arranged outside the intermediate water tank;
the surface of the water collecting pipe is provided with a plurality of water suction holes.
And a plastic elbow joint is arranged at the turning part of the water collecting pipe arranged along the step-shaped foundation pit.
The filter screen is geotechnical cloth material, the interval 50cm sets up between the hole that absorbs water.
The vertical water drainage pipe is made of plastic materials, and the middle water tank is in a through mode.
The vertical water drainage pipe is made of plastic materials, the middle water tank is in a non-through form, the cross section of the middle water tank is in a u shape, and the middle water tank is wrapped by the permeable film.
The buried depth of the vertical water drainage pipe is not less than 2 m.
And a heating rod is arranged in the middle water tank in a through mode, and a power supply of the heating rod is independently supplied with power.
Excavation deep basal pit in mountain and hilly topography, step type deep basal pit is striden to height that has formed obvious difference in height, it has the basement outer wall to build around deep basal pit, be provided with the basement bottom plate at basement outer wall inboard, set up a drainage slope all around along the outside of basement outer wall and be 1% from the drainage blind ditch of high bottom plate face to low bottom plate face, collect low bottom plate face with water, set up the sump pit at low bottom plate face, place the self priming pump in the sump pit, the self priming pump directly takes out water to the cistern on the low ground in.
The blind ditches are arranged around the bottom plate with the same elevation, and upper water is collected through the blind ditches, so that the water pressure of the basement bottom plate is reduced, and the number of uplift piles below the basement bottom plate is reduced. And connecting the high-low bridging joints of the foundation pit by using an elbow, directly draining water to a slightly lower bottom plate surface, and draining the water into a lower bottom plate blind ditch by using the same principle until the water is collected into a water collecting well with the lower bottom plate surface. The lower part of the bottom plate of the basement with the low bottom plate surface is provided with a water collecting pit with the length of 5000mm multiplied by 3000mm, a self-sucking pump is arranged in the water collecting pit, and water is sucked into a reservoir of a positive and negative zero top plate of the basement.
The water in the reservoir is used for field construction, garden irrigation and cleaning water.
Claims (7)
1. A siphon drainage system for a blind ditch of a foundation pit comprises a basement outer wall arranged in a step-shaped deep foundation pit, drainage blind ditches arranged around the outer side of the basement outer wall, wherein the drainage blind ditches are communicated and fully distributed along the positions, close to the foundation pit wall, from a high bottom plate surface to a low bottom plate surface of the step-shaped foundation pit, the drainage blind ditches on the low bottom plate surface are communicated to a water collecting pit, a self-sucking pump is arranged in the water collecting pit, and the self-sucking pump directly sucks water into a reservoir on the low ground; the method is characterized in that: a one-way valve is arranged on a hose communicated between the water collecting pit and the reservoir; the drainage blind ditch comprises vertical drainage plates, a water collecting pipe, a gravel layer, a gravel cushion layer and a filter screen, wherein the vertical drainage plates are uniformly distributed along the length direction of the water collecting pipe, a water flow channel of the vertical drainage plates is communicated with the water collecting pipe, the filter screen wraps the water collecting pipe, the gravel layer is arranged on the outer side of the filter screen, and the gravel cushion layer is wrapped on the outer side of the gravel layer;
an intermediate water tank is arranged in the vertical drainage plate, the upper end of the intermediate water tank is communicated to the water collecting pipe through a communicating pipe, and a permeable film is arranged outside the intermediate water tank;
the surface of the water collecting pipe is provided with a plurality of water suction holes.
2. The siphon drainage system for blind ditches of foundation pits of claim 1, wherein: and a plastic elbow joint is arranged at the turning part of the water collecting pipe arranged in the step-shaped foundation pit.
3. The siphon drainage system for blind ditches of foundation pits of claim 1, wherein: the filter screen is geotechnical cloth material, the interval sets up 50cm between the hole that absorbs water that the collector pipe surface set up.
4. A pit blind ditch siphon drainage system according to claim 2, characterized in that: the vertical water drainage pipe is made of plastic materials, and the middle water tank is in a through mode.
5. A pit blind ditch siphon drainage system according to claim 2, characterized in that: the vertical water drainage pipe is made of plastic materials, the middle water tank is in a non-through form, the cross section of the middle water tank is in a u shape, and the middle water tank is wrapped by the permeable film.
6. A pit blind ditch siphon drainage system according to claim 5, characterized in that: the buried depth of the vertical water drainage pipe is not less than 2 m.
7. A pit blind ditch siphon drainage system according to claim 4, characterized in that: be provided with the heating rod in the middle basin of link up form, the power of heating rod is independent power supply, and inside vacuum pump passed through pipe, sand bed course and vertical drainage channel during the use, added the negative pressure to the foundation ditch, the inside pore water of foundation ditch oozes gradually and flows to vertical drainage channel in to in collecting vertical drainage channel under the effect of negative pressure, finally through sand bed course and pipe discharge
The blind ditches are arranged around the bottom plate at the same elevation, and upper water is collected through the blind ditches, so that the water pressure of the bottom plate of the basement is reduced, and the number of uplift piles below the bottom plate of the basement is reduced; connecting the high-low bridging joints of the foundation pit by using an elbow, directly draining water to a slightly lower bottom plate surface, and draining the water into a lower bottom plate blind ditch by using the same principle until the water is collected into a water collecting well with the lower bottom plate surface; the lower part of the bottom plate of the basement with the low bottom plate surface is provided with a water collecting pit with the length of 5000mm multiplied by 3000mm, a self-sucking pump is arranged in the water collecting pit, and water is sucked into a reservoir of a positive and negative zero top plate of the basement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129306.6A CN110820776A (en) | 2019-11-18 | 2019-11-18 | Siphon drainage system for blind ditch of foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911129306.6A CN110820776A (en) | 2019-11-18 | 2019-11-18 | Siphon drainage system for blind ditch of foundation pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110820776A true CN110820776A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911129306.6A Pending CN110820776A (en) | 2019-11-18 | 2019-11-18 | Siphon drainage system for blind ditch of foundation pit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411586A (en) * | 2020-09-27 | 2021-02-26 | 中建四局第六建设有限公司 | Water seepage blind drain for basement roof drainage and construction method thereof |
| CN114541448A (en) * | 2022-04-06 | 2022-05-27 | 中国建筑一局(集团)有限公司 | Be used for foundation ditch earth's surface water to fall and arrange gravity type siphon device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205348204U (en) * | 2016-02-22 | 2016-06-29 | 江苏中联路基工程有限公司 | Light well point precipitation system |
| CN106592756A (en) * | 2017-01-23 | 2017-04-26 | 中国建筑第四工程局有限公司 | Karst region step-type basement water drainage structure and construction method thereof |
| CN207672556U (en) * | 2017-09-12 | 2018-07-31 | 中交天津港湾工程研究院有限公司 | A kind of hot laid plastic drain bar |
-
2019
- 2019-11-18 CN CN201911129306.6A patent/CN110820776A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205348204U (en) * | 2016-02-22 | 2016-06-29 | 江苏中联路基工程有限公司 | Light well point precipitation system |
| CN106592756A (en) * | 2017-01-23 | 2017-04-26 | 中国建筑第四工程局有限公司 | Karst region step-type basement water drainage structure and construction method thereof |
| CN207672556U (en) * | 2017-09-12 | 2018-07-31 | 中交天津港湾工程研究院有限公司 | A kind of hot laid plastic drain bar |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112411586A (en) * | 2020-09-27 | 2021-02-26 | 中建四局第六建设有限公司 | Water seepage blind drain for basement roof drainage and construction method thereof |
| CN114541448A (en) * | 2022-04-06 | 2022-05-27 | 中国建筑一局(集团)有限公司 | Be used for foundation ditch earth's surface water to fall and arrange gravity type siphon device |
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Application publication date: 20200221 |
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