CN103061670A - Structure for preventing collapse of boreholes in pebble bed and construction method thereof - Google Patents
Structure for preventing collapse of boreholes in pebble bed and construction method thereof Download PDFInfo
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- CN103061670A CN103061670A CN2013100044768A CN201310004476A CN103061670A CN 103061670 A CN103061670 A CN 103061670A CN 2013100044768 A CN2013100044768 A CN 2013100044768A CN 201310004476 A CN201310004476 A CN 201310004476A CN 103061670 A CN103061670 A CN 103061670A
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Abstract
The invention discloses a structure for preventing collapse of boreholes in a pebble bed and a construction method thereof. The structure is formed by a mud layer applied to walls of pebble bed boreholes. The invention further provides a construction of the structure. The mud layer composed of clay, cement, crushed plant straw and water is applied to the peripheral wall of the boreholes, the mud layer on the peripheral walls of the boreholes can protect cementing force between pebbles, and collapse of the pebble bed boreholes can be prevented effectively.
Description
Technical field
The present invention relates to a kind of constructing structure and method, particularly relate to a kind of boulder bed boring collapse pore structure and job practices of preventing.
Background technology
When boulder bed carries out test boring, because the bond between the cobble is poor, the hole of very easily collapsing, that not only can't hole creeps into, and usually can be so that drilling tool is stuck in the boring can't take out.Also do not solve at present the collapse good method in hole of boulder bed test boring on the engineering, it generally all is elder generation's lower protection casing in pebble layer boring, and then the work of creeping into of holing, the effect that setting of casing plays is limited, in the relatively poor situation of boulder bed cementing power, sleeve pipe goes down under being difficult to, and causes easily sleeve pipe to be embedded in the boring, not only can't solve the Practical Project problem, but also cause very large economic loss.
Summary of the invention
The present invention provides a kind of boulder bed boring collapse pore structure and job practices of preventing for solving the technical problem that exists in the known technology.
The present invention for a technical scheme that solves the technical problem that exists in the known technology and take is: a kind of boulder bed boring pore structure that collapses that prevents, this structure is the mud cortex that is put on the boulder bed borehole wall.
The thickness of described mud cortex is 30-60mm.
Another technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the job practices of said structure may further comprise the steps:
One) preparation mud skin, with cement, straw particle, clay and water according to: the quality of 1:8:3:3 to 1:6:2:2 is more even than mix;
Wherein maximum clay particle diameter is no more than 20mm, and the maximum rod joint length of straw particle is less than 25mm, and cement factor is not less than 9% of mud skin gross mass, and straw particle content is not less than 18% of mud skin gross mass;
Two) hole with slewing drilling machine, enter boulder bed after, should guarantee that core-taking rate is not less than 30%, each drilling depth is less than 0.5m, after each drilling depth is finished, stop to creep into, and the mud skin for preparing in advance is put on the boulder bed borehole wall with long-armed scraper equably; The mud skin left standstill 2-3 hour before use;
Three) be put on the wall after 1-3 hour repeating step two until the mud skin) until finish the boring of whole boulder bed.
Described cement is early-strength cement.
Advantage and good effect that the present invention has are: use the mud skin that is comprised of clay, cement, straw particle and water to be put on around the drill hole wall; mud cortex around the drill hole wall can play the effect that bond between the cobble is strengthened in protection, can effectively prevent and treat the hole of collapsing of boulder bed boring.
Description of drawings
Fig. 1 is a kind of collapse structural representation of pore structure of boulder bed boring that prevents of the present invention.
The specific embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and cooperate accompanying drawing to be described in detail as follows:
See also Fig. 1, a kind of boulder bed boring pore structure that collapses that prevents, this structure is the mud cortex 2 that is put on the boulder bed borehole wall 1.The thickness of mud cortex 2 is looked the degree of consolidation of boulder bed and is determined that thickness should be in the 30-60mm scope.
The job practices of said structure may further comprise the steps:
One) preparation mud skin: at first with the large particle diameter soil particle crushing in the clay, so that maximum clay particle diameter is no more than 20mm, then straw is pulverized with powder grass machine, make the maximum rod joint length of straw particle less than 25mm, at last, cement, straw particle, clay and water is more even than mix according to the quality of 1:8:3:3 to 1:6:2:2, and cement factor is not less than 9% of mud skin gross mass, and straw particle content is not less than 18% of mud skin gross mass.
Above-mentioned straw particle can be wheat stalk, also can be corn or rice straw.Above-mentioned cement is preferably early-strength cement, if the duration permission also can be Portland cement.Clay, cement, straw particle and water stir leave standstill 2-3 hour after, can use.
Two) hole with slewing drilling machine, after entering boulder bed, should guarantee that core-taking rate is not less than 30%, each drilling depth is less than 0.5m, after each drilling depth is finished, stop to creep into, the mud skin for preparing in advance is put on the borehole wall with long-armed scraper equably, the thickness of mud cortex is looked the degree of consolidation of boulder bed and is determined that thickness is in the 30-60mm scope.
Three) be put on the wall after 1-3 hour repeating step two until the mud skin) until finish the boring of whole boulder bed.
In the process of creeping into, can adjust at any time drilling depth according to core-taking rate, should guarantee that core-taking rate is not less than 30%.
In above-mentioned mud skin, clay is the main material of mud skin, in the mud skin, play skeleton function, the effect of cement is the bond that improves the mud skin on the one hand, to make the intensity of mud skin satisfy at short notice requirement of strength on the other hand, the effect of straw particle is the bond that effectively strengthens the mud skin, and the effect of water is the effect of playing the mix agent, so that clay, cement and straw particle are can mix even.
Although the above is described the preferred embodiments of the present invention by reference to the accompanying drawings; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (4)
1. one kind prevents the boulder bed boring pore structure that collapses, and it is characterized in that this structure is the mud cortex that is put on the boulder bed borehole wall.
2. the boulder bed boring pore structure that collapses that prevents according to claim 1 is characterized in that the thickness of described mud cortex is 30-60mm.
3. the collapse job practices of pore structure of boulder bed boring that prevents according to claim 1 is characterized in that, may further comprise the steps:
One) preparation mud skin, with cement, straw particle, clay and water according to: the quality of 1:8:3:3 to 1:6:2:2 is more even than mix;
Wherein maximum clay particle diameter is no more than 20mm, and the maximum rod joint length of straw particle is less than 25mm, and cement factor is not less than 9% of mud skin gross mass, and straw particle content is not less than 18% of mud skin gross mass;
Two) hole with slewing drilling machine, enter boulder bed after, should guarantee that core-taking rate is not less than 30%, each drilling depth is less than 0.5m, after each drilling depth is finished, stop to creep into, and the mud skin for preparing in advance is put on the boulder bed borehole wall with long-armed scraper equably; The mud skin left standstill 2-3 hour before use;
Three) be put on the wall after 1-3 hour repeating step two until the mud skin) until finish the boring of whole boulder bed.
4. job practices according to claim 3 is characterized in that, described cement is early-strength cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310004476.8A CN103061670B (en) | 2013-01-06 | 2013-01-06 | Structure for preventing collapse of boreholes in pebble bed and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310004476.8A CN103061670B (en) | 2013-01-06 | 2013-01-06 | Structure for preventing collapse of boreholes in pebble bed and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN103061670A true CN103061670A (en) | 2013-04-24 |
| CN103061670B CN103061670B (en) | 2015-03-25 |
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| CN201310004476.8A Active CN103061670B (en) | 2013-01-06 | 2013-01-06 | Structure for preventing collapse of boreholes in pebble bed and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108086910A (en) * | 2018-01-18 | 2018-05-29 | 北京地矿工程建设有限责任公司 | Long spire extruded and extended pile drilling machine boring method and long spire extruded and extended pile drilling machine |
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| CN1074504A (en) * | 1992-09-25 | 1993-07-21 | 河北华兴基础公司 | Turriform awl, hand basket method pore-forming technique in boulder bed |
| CN1309210A (en) * | 2001-03-28 | 2001-08-22 | 北京城建地铁地基市政工程有限公司 | Technology for constructing drilled and cast-in-situ pile with protective clay wall |
| JP2002097629A (en) * | 2000-09-27 | 2002-04-02 | Yamashin Kogyo Kk | Method and device for mixing and feeding mechanically stirred air and cement milk under pressure |
| CN1380470A (en) * | 2001-04-13 | 2002-11-20 | 河北省水利工程局 | Impervious wall construction and soilslip-resisting and leakage-blocking process |
| CN101100857A (en) * | 2007-07-31 | 2008-01-09 | 蓝冰 | Soil cement fixed pile wall based on foundation ditch supporting and construction method thereof |
| CN101475332A (en) * | 2009-01-19 | 2009-07-08 | 中国科学院武汉岩土力学研究所 | Preparation and use of sludge-stalk fibrous composite |
| CN101545357A (en) * | 2009-05-06 | 2009-09-30 | 中铁二局股份有限公司 | Method for drilling hole with plastic clay for protecting wall of hole |
| CN102444119A (en) * | 2011-09-19 | 2012-05-09 | 刘清洁 | Method for constructing pipe-sinking cast-in-place pile in pebble layer, gravel layer and sand layer |
| CN203035080U (en) * | 2013-01-06 | 2013-07-03 | 中国建筑第六工程局有限公司 | Structure for preventing hole collapse of pebble layer drilling holes |
-
2013
- 2013-01-06 CN CN201310004476.8A patent/CN103061670B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074504A (en) * | 1992-09-25 | 1993-07-21 | 河北华兴基础公司 | Turriform awl, hand basket method pore-forming technique in boulder bed |
| JP2002097629A (en) * | 2000-09-27 | 2002-04-02 | Yamashin Kogyo Kk | Method and device for mixing and feeding mechanically stirred air and cement milk under pressure |
| CN1309210A (en) * | 2001-03-28 | 2001-08-22 | 北京城建地铁地基市政工程有限公司 | Technology for constructing drilled and cast-in-situ pile with protective clay wall |
| CN1380470A (en) * | 2001-04-13 | 2002-11-20 | 河北省水利工程局 | Impervious wall construction and soilslip-resisting and leakage-blocking process |
| CN101100857A (en) * | 2007-07-31 | 2008-01-09 | 蓝冰 | Soil cement fixed pile wall based on foundation ditch supporting and construction method thereof |
| CN101475332A (en) * | 2009-01-19 | 2009-07-08 | 中国科学院武汉岩土力学研究所 | Preparation and use of sludge-stalk fibrous composite |
| CN101545357A (en) * | 2009-05-06 | 2009-09-30 | 中铁二局股份有限公司 | Method for drilling hole with plastic clay for protecting wall of hole |
| CN102444119A (en) * | 2011-09-19 | 2012-05-09 | 刘清洁 | Method for constructing pipe-sinking cast-in-place pile in pebble layer, gravel layer and sand layer |
| CN203035080U (en) * | 2013-01-06 | 2013-07-03 | 中国建筑第六工程局有限公司 | Structure for preventing hole collapse of pebble layer drilling holes |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108086910A (en) * | 2018-01-18 | 2018-05-29 | 北京地矿工程建设有限责任公司 | Long spire extruded and extended pile drilling machine boring method and long spire extruded and extended pile drilling machine |
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| Publication number | Publication date |
|---|---|
| CN103061670B (en) | 2015-03-25 |
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