CN109577380B - Construction method for basement bottom plate water seepage under karst landform condition - Google Patents
Construction method for basement bottom plate water seepage under karst landform condition Download PDFInfo
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- CN109577380B CN109577380B CN201811395766.9A CN201811395766A CN109577380B CN 109577380 B CN109577380 B CN 109577380B CN 201811395766 A CN201811395766 A CN 201811395766A CN 109577380 B CN109577380 B CN 109577380B
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- water
- bottom plate
- steel pipe
- prefabricated steel
- water seepage
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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
- E02D1/00—Investigation of foundation soil in situ
- E02D1/08—Investigation of foundation soil in situ after finishing the foundation structure
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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
- E02D31/04—Watertight packings for use under hydraulic pressure
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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
- E02D31/10—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 soil pressure or hydraulic pressure
- E02D31/12—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 soil pressure or hydraulic pressure against upward hydraulic pressure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0021—Mortar
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
Abstract
The invention discloses a construction method for water seepage of a basement bottom plate under a karst landform condition, which comprises a prefabricated steel pipe, wherein an annular plate is welded in the middle of the prefabricated steel pipe, through holes are uniformly distributed in the annular plate, expansion bolts are arranged in the through holes, water seepage holes are uniformly distributed in the pipe wall of the lower part of the prefabricated steel pipe, a filter screen sleeve is sleeved on the lower part of the prefabricated steel pipe, and a backwashing device is inserted in the prefabricated steel pipe. According to the invention, holes are formed in the seriously leaked area according to the water seepage distribution condition of the structural bottom plate, the underground water is decompressed and drained by adopting the rear decompression drain pipe, backwashing is regularly carried out to ensure that the drain pipe is smooth, and the bottom plate is kept dry. Therefore, the invention has the characteristics of simple structure, low manufacturing cost, obvious drainage effect and the like, can be widely applied to projects of cracking and leakage of the bottom plate caused by confined water, and has wide popularization.
Description
Technical Field
The invention relates to a construction method for basement bottom plate water seepage under a karst landform condition, and belongs to the technical field of waterproof engineering in building construction.
Background
Karst landform widely distributes in the precious plateau region of china's cloud, leads to the rock crack big because of its soluble rock characteristics, the water permeability is strong, very easily forms local high pressure-bearing water spot, and this phenomenon leads to the bottom plate to appear the seepage condition more in the building work in-process, and the foundation bottom plate of building easily causes the phenomenon of bottom plate fracture infiltration because of the water pressure influence in high pressure-bearing water region, consequently needs in time to dredge to bottom plate pressure-bearing water. The traditional construction method for plugging, grouting and hydrophobic layer is not only troublesome in construction, but also is easy to cause water seepage repeatedly, and the drainage effect is not obvious.
Disclosure of Invention
The invention aims to provide a construction method for basement bottom plate water seepage under karst landform conditions, which is convenient to construct, low in cost and obvious in drainage effect, so as to overcome the defects in the prior art.
The technical scheme of the invention is as follows: a construction method for basement bottom board water seepage under the condition of karst landform is characterized by firstly calculating the maximum water inflow amount of basement bottom board water seepage according to the following formula:
in the formula:
q-water inflow
R-radius of influence, determined from the well data
r-radius of pile hole
h0Length of effective water inlet section
S-pile hole water level depth reduction
K-permeability coefficient
lgRAnd lgrThe values are taken according to the second volume of the Water supply hydrology and geology handbook
When the water inflow Q is less than 60m3D, when the water head pressure is less than 0.1Mpa, adopting anchor rod compaction pressure-resistant method to make construction, when the water inflow Q is greater than or equal to 60m3And d, when the water head pressure is more than or equal to 0.1Mpa, constructing by adopting a buried pipe drainage method.
In the method, when the drill rod anchor compaction pressure-resistant method is adopted for construction, firstly two or more water-swelling water stop strips are fixed on the rod body of the pressure-resistant anchor rod, then a water drill is adopted for drilling at the water seepage position of the basement bottom plate, the prefabricated pressure-resistant anchor rod is hammered into the drilled hole, and finally cement mortar is adopted for plugging the upper end of the pressure-resistant anchor rod.
In the method, the plugging agent is blended in the cement mortar, and the ratio of the cement mortar to the plugging agent is 1: 2.
In the method, when the pipe burying dredging method is adopted for construction, firstly, water seepage holes are formed in the pipe wall of the lower portion of the prefabricated steel pipe, a filter screen sleeve is sleeved on the lower portion of the prefabricated steel pipe, then a water drill is adopted for drilling holes in the water seepage position of the basement bottom plate, then the lower portion of the prefabricated steel pipe is inserted into the drilled holes for fixing, gaps between the prefabricated steel pipe and the drilled holes are plugged, at the moment, the upper end of the prefabricated steel pipe is connected with a drainage pipe, and therefore seepage water of the basement bottom plate enters the prefabricated steel pipe from the water seepage holes, and then the seepage water is drained to an indoor water collecting well through the drainage pipe and drained out, and the effect of.
In the method, the middle part of the prefabricated steel pipe is welded with the annular plate, the annular plate is uniformly provided with the through holes, and the expansion bolts penetrate through the through holes and then are fixed on the basement bottom plate, so that the prefabricated steel pipe can be fixed in the drill hole.
In the method, the rubber pad is arranged at the bottom of the annular plate and sleeved on the prefabricated steel pipe.
In the method, the backwashing device is inserted into the prefabricated steel pipe, and when more impurities are deposited in the prefabricated steel pipe 2, the backwashing device can be pulled up and down to clean the prefabricated steel pipe in order to prevent the impurities from blocking the water seepage holes.
In the method, the backwashing device is composed of a pull rod and a cleaning ring connected to the lower end of the pull rod.
In the method, the upper end of the prefabricated steel pipe is provided with a threaded joint, and the prefabricated steel pipe is connected with a drain pipe through the threaded joint.
Due to the adoption of the technical scheme, the invention has the advantages that: the invention solves the pressure condition of local high-pressure water from the root by adopting the measures of pressure resistance and pressure relief respectively, thereby having good prevention and control effect, having the characteristics of low construction cost, obvious effect, reliable quality, easy construction and the like, being widely applied to the engineering of abundant underground water under the condition of karst landform and having practicability and wide popularization.
Drawings
FIG. 1 is a schematic structural view of a buried pipe dredging method;
FIG. 2 is a schematic structural diagram of a backwashing device;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic structural view of the implementation of the compression method of the anchor rod.
Description of reference numerals: 1-threaded joint, 2-prefabricated steel pipe, 3-annular plate, 4-expansion bolt, 5-rubber pad, 6-filter screen sleeve, 7-backwashing rod, 8-bottom plate, 9-water seepage hole, 10-pull rod, 11-cleaning ring, 12-pressure-resistant anchor rod, 13-water-expansion water stop bar and 14-cement mortar.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
The embodiment of the invention comprises the following steps: a construction method for basement bottom board water seepage under the condition of karst landform is characterized by firstly calculating the maximum water inflow amount of basement bottom board water seepage according to the following formula:
in the formula:
q-water inflow
R-radius of influence, determined from the well data
r-radius of pile hole
h0Length of effective water inlet section
S-pile hole water level depth reduction
K-permeability coefficient
lgRAnd lgrThe values are taken according to the second volume of the Water supply hydrology and geology handbook
When the water inflow Q is less than 60m3D, when the water head pressure is less than 0.1Mpa, adopting anchor rod compaction pressure-resistant method to make construction, when the water inflow Q is greater than or equal to 60m3And d, when the water head pressure is more than or equal to 0.1Mpa, constructing by adopting a buried pipe drainage method.
Referring to fig. 1, when the pipe burying dredging method is adopted for construction, firstly, a water seepage hole 9 is formed in the pipe wall of the lower portion of a prefabricated steel pipe 2, a filter screen sleeve 6 is sleeved on the lower portion of the prefabricated steel pipe 2, then a water drill is adopted for drilling at the water seepage position of a basement bottom plate, then the lower portion of the prefabricated steel pipe 2 is inserted into the drill hole for fixing, a gap between the prefabricated steel pipe 2 and the drill hole is plugged, at the moment, the upper end of the prefabricated steel pipe 2 is connected with a water drainage pipe through a threaded connector 1, so that the water seepage of the basement bottom plate enters the prefabricated steel pipe 2 from the water seepage hole 9, the water seepage is drained to an indoor water collecting well through the water drainage pipe and is discharged. The middle part welding of prefabricated steel pipe 2 has annular slab 3, and the equipartition has the through-hole on annular slab 3, and expansion bolts 4 will be fixed on the basement bottom plate at annular slab 3 after passing the through-hole, alright make prefabricated steel pipe 2 fix in the drilling like this. The bottom of annular plate 3 is provided with rubber pad 5, and rubber pad 5 cover is on prefabricated steel pipe 2, prevents further water in the drilling to ooze through rubber pad 5. The backwashing device 7 is inserted into the prefabricated steel pipe 2, and when more impurities are deposited in the prefabricated steel pipe 2, the backwashing device 7 can be pulled up and down to clean the prefabricated steel pipe 2 in order to prevent the impurities from blocking the water seepage holes 9. Referring to fig. 2 and 3, the backwashing device 7 is composed of a draw bar 10 and a cleaning ring 11 connected to the lower end of the draw bar 10.
Referring to fig. 4, when the construction is performed by adopting the drill rod anchor compaction and pressure resistance method, four water-swelling water stop strips 13 are fixed on the rod body of the pressure resistant anchor rod 12, then a water drill is used for drilling at the water seepage position of the basement bottom plate, the prefabricated pressure resistant anchor rod 12 is hammered into the drilled hole, and finally cement mortar is used for plugging the upper end of the pressure resistant anchor rod 12. The cement mortar 14 is blended with a plugging agent, and the ratio of the cement mortar 14 to the plugging agent is 1: 2.
In conclusion, the pressure-resistant and pressure-relief measures are adopted respectively to radically solve the pressure condition of local high-pressure water, so that the method has a good prevention and control effect, has the characteristics of low construction cost, obvious effect, reliable quality, easiness in construction and the like, can be widely applied to underground water-rich projects under karst landform conditions, and has practicability and wide popularization.
Claims (9)
1. A construction method for water seepage of a basement bottom plate under the condition of karst landform is characterized by comprising the following steps: firstly, calculating the maximum water inflow of the basement bottom plate seepage according to the following formula:
in the formula:
q-water inflow
R-radius of influence, determined from the well data
r-radius of pile hole
h0Length of effective water inlet section
S-pile hole water level depth reduction
K-permeability coefficient
R is valued according to the second volume of the Water supply hydrology and geology Manual
When the water inflow Q is less than 60m3D, when the water head pressure is less than 0.1Mpa, adopting anchor rod compaction pressure-resistant method to make construction, when the water inflow Q is greater than or equal to 60m3And d, when the water head pressure is more than or equal to 0.1Mpa, constructing by adopting a buried pipe drainage method.
2. The construction method for water seepage of the basement bottom plate under the karst landform condition as claimed in claim 1, wherein: when the construction is carried out by adopting the drill rod anchor compaction pressure-resistant method, more than two water-swelling water stop strips (13) are fixed on the rod body of the pressure-resistant anchor rod (12), then the water seepage position of the basement bottom plate is drilled by adopting a water drill, the prefabricated pressure-resistant anchor rod (12) is hammered into the drilled hole, and finally the upper end of the pressure-resistant anchor rod (12) is plugged by adopting cement mortar.
3. The construction method for water seepage of the basement bottom plate under the karst landform condition as claimed in claim 2, wherein: the cement mortar (14) is blended with a plugging agent, and the ratio of the cement mortar (14) to the plugging agent is 1: 2.
4. The construction method for water seepage of the basement bottom plate under the karst landform condition as claimed in claim 1, wherein: when the buried pipe drainage method is adopted for construction, firstly, a water seepage hole (9) is formed in the pipe wall of the lower portion of the prefabricated steel pipe (2), a filter screen sleeve (6) is sleeved on the lower portion of the prefabricated steel pipe (2), then a water drill is adopted to drill a water seepage position of the basement bottom plate, then the lower portion of the prefabricated steel pipe (2) is inserted into the drilled hole to be fixed, a gap between the prefabricated steel pipe (2) and the drilled hole is plugged, the upper end of the prefabricated steel pipe (2) is connected with a drainage pipe, so that water seepage of the basement bottom plate can enter the prefabricated steel pipe (2) from the water seepage hole (9), and then water seepage drainage is carried out to an indoor water collecting well by the drainage pipe and is discharged, and the effect of pressure.
5. The construction method for water seepage of the basement bottom plate under the karst landform condition as claimed in claim 4, wherein: the middle part welding of prefabricated steel pipe (2) has annular slab (3), and the equipartition has the through-hole on annular slab (3), and expansion bolts (4) pass behind the through-hole and fix annular slab (3) on the basement bottom plate, alright make prefabricated steel pipe (2) fix in the drilling like this.
6. The construction method for water seepage of the basement bottom plate under the karst landform condition as claimed in claim 5, wherein: the bottom of the annular plate (3) is provided with a rubber pad (5), and the rubber pad (5) is sleeved on the prefabricated steel pipe (2).
7. The construction method for water seepage of the basement bottom plate under the karst landform condition as claimed in claim 4, wherein: the backwashing device (7) is inserted into the prefabricated steel pipe (2), and when more impurities are deposited in the prefabricated steel pipe (2), the backwashing device (7) can be pulled up and down to clean the prefabricated steel pipe (2) in order to prevent the impurities from blocking the water seepage holes (9).
8. The construction method for water seepage of the basement bottom plate under the karst landform condition as claimed in claim 7, wherein: the backwashing device (7) is composed of a pull rod (10) and a cleaning ring (11) connected to the lower end of the pull rod (10).
9. The construction method for water seepage of the basement bottom plate under the karst landform condition as claimed in claim 4, wherein: the upper end of the prefabricated steel pipe (2) is provided with a threaded joint (1), and the prefabricated steel pipe (2) is connected with a drain pipe through the threaded joint (1).
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| CN201811395766.9A CN109577380B (en) | 2018-11-22 | 2018-11-22 | Construction method for basement bottom plate water seepage under karst landform condition |
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| CN201811395766.9A CN109577380B (en) | 2018-11-22 | 2018-11-22 | Construction method for basement bottom plate water seepage under karst landform condition |
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| CN109577380B true CN109577380B (en) | 2020-08-25 |
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| CN110965567A (en) * | 2019-12-06 | 2020-04-07 | 广东省重工建筑设计院有限公司 | Foundation pit water burst treatment device |
| CN111387403B (en) * | 2020-04-24 | 2023-06-09 | 安徽牧洋饲料科技有限公司 | Quick and uniform thawing device for pet feed production |
| CN113202148B (en) * | 2021-05-10 | 2023-01-17 | 四川省建筑科学研究院有限公司 | Basement water conservancy diversion pressure limiting structure |
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| CN1804234A (en) * | 2006-01-18 | 2006-07-19 | 贵阳铝镁设计研究院 | Drainage method and apparatus for red mud dump in karst terrain |
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2018
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| CN1139724A (en) * | 1995-07-03 | 1997-01-08 | 柳理华 | Method of using high-effect heavy calibre well to develop shallow layer ground water |
| CN1804234A (en) * | 2006-01-18 | 2006-07-19 | 贵阳铝镁设计研究院 | Drainage method and apparatus for red mud dump in karst terrain |
| CN101250879A (en) * | 2008-04-01 | 2008-08-27 | 中国第一冶金建设有限责任公司 | Method for processing bottom solum trickleing water of deep building pit |
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