CN104420484A - Deep foundation pit soil reinforcing area confined water well protecting method - Google Patents
Deep foundation pit soil reinforcing area confined water well protecting method Download PDFInfo
- Publication number
- CN104420484A CN104420484A CN201310368085.4A CN201310368085A CN104420484A CN 104420484 A CN104420484 A CN 104420484A CN 201310368085 A CN201310368085 A CN 201310368085A CN 104420484 A CN104420484 A CN 104420484A
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- Prior art keywords
- well
- deep foundation
- wall
- confined
- foundation pit
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Classifications
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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
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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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Revetment (AREA)
Abstract
The invention relates to deep foundation pits, particularly to a deep foundation pit soil reinforcing area confined water well protecting method. The method comprises the steps of, firstly, forming and cleaning a hole at the bottom of a deep foundation pit through a drilling machine, wherein the diameter of the hole is slightly larger than that of a confined tube well; secondly, after qualified hole cleaning is achieved, installing the confined tube well, wherein the wall of the confined tube well is welded in advance with corrugated sleeve fixing stoppers; thirdly, filling medium-coarse sand inside the water filtering section of the confined tube well until reaching a elevation 1.5 m spaced from a soil improving range, installing a corrugated sleeve, filling clay mixed melon seed-shaped gravels outside the outer wall of the corrugated sleeve until reaching the elevation of a soil improving area and then filling clay outside the outer wall of the corrugated sleeve until reaching the elevation of the well, and filling medium-coarse sand into the inner wall of the corrugated sleeve until reaching 1 m away from the elevation of the wall and then filling clay into the inner wall of the corrugated sleeve; fourthly, pre-constructing a range of 500 mm around the confined well before reinforcing the deep foundation pit soil, and 12 hours later, comprehensively carrying out soil reinforcing operation. The deep foundation pit soil reinforcing area confined water well protecting method can avoid reducing dewatering effects due to deviation or deformation of the tube well, prevent cement mortar from penetrating a water filtering layer and facilitate protection of underground water quality.
Description
Technical field
The present invention relates to deep foundation ditch, particularly relate to deep foundation ditch soil property stabilization zone artesian well.
Background technology
When adopting the measure such as slip casing by pressure, agitation pile to carry out the operation of foundation ditch soil improvement, press water slurry liquid enters dewatering well drainage section along dewatering well tube wall sand filter blanket, can cause pipe well off normal, causes dried-up well phenomenon to occur after cement slurry sets, reduce foundation pit dewatering effect, and polluted underground water source.
Summary of the invention
The present invention is intended to solve the problem, and provides a kind of deep foundation ditch soil property stabilization zone artesian well guard method.The present invention avoids pipe well off normal to be out of shape reduction dewatering effect, can block cement paste and go deep into drainage layer, be conducive to the protection of groundwater quality.
In order to solve the problems of the technologies described above, a kind of deep foundation ditch soil property stabilization zone artesian well guard method, the method comprises:
Step one, adopt rig in deep foundation ditch bottom forming hole, clear hole, aperture is slightly larger than pressure-bearing pipe well diameter;
Step 2, the qualified rear installation pressure-bearing pipe well in clear hole, the pressure-bearing pipe well borehole wall has welded corrugated bushing fixed stop in advance;
Step 3, artesian well drainage section backfill medium coarse sand, be backfilled to absolute altitude distance soil improvement scope 1.5m to stop, lay corrugated bushing, corrugated bushing outer wall adopts clay to mix melon seeds sheet gravel backfill, change clay backfilling into the elevation of well after being backfilled to absolute altitude solid reinforcement district, corrugated bushing inwall medium coarse sand is backfilled to high about 1 m of well head top mark, finally uses clay backfilling;
Step 4, deep foundation ditch solid reinforcement is constructed artesian well surrounding 500mm scope in advance, carries out solid reinforcement operation after 12 hours comprehensively.
Described deep foundation ditch soil property stabilization zone artesian well guard method, the corrugated bushing fixed gear in described step 2 is the reinforcing bar that four diameters are not less than 10mm.
Described deep foundation ditch soil property stabilization zone artesian well guard method, the corrugated bushing diameter in described step 3 is greater than dewatering well tube wall diameter 200mm.
The present invention is the method adding corrugated bushing at soil improvement depth bounds, soil improvement cement grout and caliber sand filter blanket are isolated, and reinforce in advance within the scope of distance pressure-bearing pipe well surrounding 500mm in advance, after the reinforcing of pipe well surrounding is not less than 12 hours, then carry out soil improvement operation comprehensively.Thus protection pipe well normally runs; Artesian well tube wall surrounding is reinforced in advance and is avoided pipe well off normal to be out of shape reduction dewatering effect; Peripheral bellows and in advance reinforcing can block cement paste and go deep into drainage layer; Be beneficial to groundwater quality protection.
Detailed description of the invention
A kind of deep foundation ditch soil property stabilization zone artesian well guard method of the present invention, the method comprises:
Step one, adopt rig in deep foundation ditch bottom forming hole, clear hole, aperture is slightly larger than pressure-bearing pipe well diameter;
Step 2, the qualified rear installation pressure-bearing pipe well in clear hole, the pressure-bearing pipe well borehole wall welds four diameters in advance and is not less than the reinforcing bar of 10mm as corrugated bushing fixed stop;
Step 3, artesian well drainage section backfill medium coarse sand, be backfilled to absolute altitude distance soil improvement scope 1.5m to stop, lay corrugated bushing, corrugated bushing diameter is greater than dewatering well tube wall diameter 200mm, and corrugated bushing outer wall adopts clay to mix melon seeds sheet gravel backfill, changes clay backfilling into the elevation of well after being backfilled to absolute altitude solid reinforcement district, corrugated bushing inwall medium coarse sand is backfilled to high about 1 m of well head top mark, finally uses clay backfilling;
Step 4, deep foundation ditch solid reinforcement is constructed artesian well surrounding 500mm scope in advance, carries out solid reinforcement operation after 12 hours comprehensively.
Claims (3)
1. a deep foundation ditch soil property stabilization zone artesian well guard method, it is characterized in that, the method comprises:
Step one, adopt rig in deep foundation ditch bottom forming hole, clear hole, aperture is slightly larger than pressure-bearing pipe well diameter;
Step 2, the qualified rear installation pressure-bearing pipe well in clear hole, the pressure-bearing pipe well borehole wall has welded corrugated bushing fixed stop in advance;
Step 3, artesian well drainage section backfill medium coarse sand, be backfilled to absolute altitude distance soil improvement scope 1.5m to stop, lay corrugated bushing, corrugated bushing outer wall adopts clay to mix melon seeds sheet gravel backfill, change clay backfilling into the elevation of well after being backfilled to absolute altitude solid reinforcement district, corrugated bushing inwall medium coarse sand is backfilled to high about 1 m of well head top mark, finally uses clay backfilling;
Step 4, deep foundation ditch solid reinforcement is constructed artesian well surrounding 500mm scope in advance, carries out solid reinforcement operation after 12 hours comprehensively.
2. deep foundation ditch soil property stabilization zone artesian well guard method according to claim 1, is characterized in that, the corrugated bushing fixed gear in described step 2 is the reinforcing bar that four diameters are not less than 10mm.
3. deep foundation ditch soil property stabilization zone artesian well guard method according to claim 1, is characterized in that, the corrugated bushing diameter in described step 3 is greater than dewatering well tube wall diameter 200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310368085.4A CN104420484B (en) | 2013-08-22 | 2013-08-22 | The artesian well guard method of deep basal pit soil property stabilization zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310368085.4A CN104420484B (en) | 2013-08-22 | 2013-08-22 | The artesian well guard method of deep basal pit soil property stabilization zone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104420484A true CN104420484A (en) | 2015-03-18 |
| CN104420484B CN104420484B (en) | 2016-09-28 |
Family
ID=52970546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310368085.4A Active CN104420484B (en) | 2013-08-22 | 2013-08-22 | The artesian well guard method of deep basal pit soil property stabilization zone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104420484B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313437A (en) * | 2016-04-27 | 2017-11-03 | 上海十三冶建设有限公司 | The shut-in well construction method of foundation ditch pressure-bearing dewatering well |
| CN107956221A (en) * | 2017-12-12 | 2018-04-24 | 中国冶集团有限公司 | Downcast well pipe proof protecting device and construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2523794Y (en) * | 2001-08-20 | 2002-12-04 | 储文奇 | Light well tube against blocking |
| CN101294393A (en) * | 2007-04-29 | 2008-10-29 | 上海市第七建筑有限公司 | Construction method with dewatering water well equipped outside of foundation pit |
| JP2009121063A (en) * | 2007-11-12 | 2009-06-04 | Ohbayashi Corp | Service well, method of constructing service well, and structure of service well |
| CN201546230U (en) * | 2009-11-05 | 2010-08-11 | 上海广联建设发展有限公司 | Protecting device for construction dewatering well |
| CN203145028U (en) * | 2013-03-19 | 2013-08-21 | 浙江万寿建筑工程有限公司 | Corrugated pipe water-collecting well |
-
2013
- 2013-08-22 CN CN201310368085.4A patent/CN104420484B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2523794Y (en) * | 2001-08-20 | 2002-12-04 | 储文奇 | Light well tube against blocking |
| CN101294393A (en) * | 2007-04-29 | 2008-10-29 | 上海市第七建筑有限公司 | Construction method with dewatering water well equipped outside of foundation pit |
| JP2009121063A (en) * | 2007-11-12 | 2009-06-04 | Ohbayashi Corp | Service well, method of constructing service well, and structure of service well |
| CN201546230U (en) * | 2009-11-05 | 2010-08-11 | 上海广联建设发展有限公司 | Protecting device for construction dewatering well |
| CN203145028U (en) * | 2013-03-19 | 2013-08-21 | 浙江万寿建筑工程有限公司 | Corrugated pipe water-collecting well |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313437A (en) * | 2016-04-27 | 2017-11-03 | 上海十三冶建设有限公司 | The shut-in well construction method of foundation ditch pressure-bearing dewatering well |
| CN107956221A (en) * | 2017-12-12 | 2018-04-24 | 中国冶集团有限公司 | Downcast well pipe proof protecting device and construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104420484B (en) | 2016-09-28 |
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| C14 | Grant of patent or utility model | ||
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