CN103061670B - 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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- CN103061670B CN103061670B CN201310004476.8A CN201310004476A CN103061670B CN 103061670 B CN103061670 B CN 103061670B CN 201310004476 A CN201310004476 A CN 201310004476A CN 103061670 B CN103061670 B CN 103061670B
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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 structure and the construction method that prevent boulder bed boring collapse hole.
Background technology
When boulder bed carries out test boring, because the bond between cobble is poor, very easily collapse hole occurs, that not only cannot carry out holing creeps into, and drilling tool usually can be made to be stuck in boring and cannot to take out.Current engineering does not also solve the good method of boulder bed test boring collapse hole, general is all elder generation's lower protection casing in pebble layer boring, and then carry out holing creep into work, the limited efficiency that setting of casing plays, when boulder bed cementing power is poor, sleeve pipe goes down under being difficult to, and easily causes sleeve pipe to bury in the borehole, not only cannot solve Practical Project problem, but also cause very large economic loss.
Summary of the invention
The present invention provides a kind of boulder bed that prevents to hole the structure of collapse hole and construction method for solving in known technology the technical problem that exists.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is: a kind of structure preventing boulder bed boring collapse hole, this structure is the mud cortex be put on 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 existed in solution known technology is: the construction method of said structure, comprises the following steps:
One) mud skin is prepared, by more even than mix according to the quality of 1:8:3:3 to 1:6:2:2 to cement, straw particle, clay and water;
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, 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 completes, stop creeping into, the mud skin prepared in advance is put on boulder bed borehole wall with long-armed scraper equably; Mud skin leaves standstill 2-3 hour before use;
Three) be put on hole wall after 1-3 hour until mud skin, repeat step 2) until complete the boring of whole boulder bed.
Described cement is early-strength cement.
The advantage that the present invention has and good effect are: be put on drill hole wall surrounding with the mud skin be made up of clay, cement, straw particle and water; the mud cortex of drill hole wall surrounding can play the effect that bond between cobble is strengthened in protection, effectively can prevent and treat the collapse hole of boulder bed boring.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation preventing the structure of boulder bed boring collapse hole of the present invention.
Detailed description of the invention
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1, a kind of structure preventing boulder bed boring collapse hole, this structure is the mud cortex 2 be put on boulder bed borehole wall 1.The thickness of mud cortex 2 is determined depending on the degree of consolidation of boulder bed, and thickness should within the scope of 30-60mm.
The construction method of said structure, comprises the following steps:
One) mud skin is prepared: first crushed by the Large stone soil particle in clay, maximum clay particle diameter is made to be no more than 20mm, then straw powder grass machine is pulverized, make the maximum rod of straw particle save length and be less than 25mm, finally, by more even than mix according to the quality of 1:8:3:3 to 1:6:2:2 to cement, straw particle, clay and water, 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 allows also can be Portland cement.Clay, cement, straw particle and water, after stirring standing 2-3 hour, 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 completes, stop creeping into, the mud skin prepared in advance is put on borehole wall with long-armed scraper equably, the thickness of mud cortex is determined depending on the degree of consolidation of boulder bed, and thickness is within the scope of 30-60mm.
Three) be put on hole wall after 1-3 hour until mud skin, repeat step 2) until complete the boring of whole boulder bed.
According to core-taking rate, drilling depth can be adjusted at any time in the process of creeping into, should guarantee that core-taking rate is not less than 30%.
In above-mentioned mud skin, clay is the main material of mud skin, skeleton function is played in mud skin, the effect of cement is the bond improving mud skin on the one hand, make the intensity of mud skin meet requirement of strength at short notice on the other hand, the effect of straw particle is the bond effectively strengthening mud skin, and the effect of water is the effect playing mix agent, make clay, cement and straw particle can mix even.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make a lot of form, these all belong within protection scope of the present invention.
Claims (2)
1. prevent a construction method for boulder bed boring collapse hole, it is characterized in that, comprise the following steps:
One) mud skin is prepared, by more even than mix according to the quality of 1:8:3:3 to 1:6:2:2 to cement, straw particle, clay and water;
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, 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 completes, stop creeping into, the mud skin prepared in advance is put on boulder bed borehole wall with long-armed scraper equably; Mud skin leaves standstill 2-3 hour before use;
Three) be put on hole wall after 1-3 hour until mud skin, repeat step 2) until complete the boring of whole boulder bed.
2. construction method according to claim 1, 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 |
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| Publication Number | Publication Date |
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| CN103061670A CN103061670A (en) | 2013-04-24 |
| CN103061670B true CN103061670B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 construction of pipe sinking cast-in-place pile in pebble bed, 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4679705B2 (en) * | 2000-09-27 | 2011-04-27 | 山伸工業株式会社 | Equipment for constructing mechanically stirred air cement milk mixed pressure feeding method |
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2013
- 2013-01-06 CN CN201310004476.8A patent/CN103061670B/en active Active
Patent Citations (8)
| 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 |
| 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 construction of pipe sinking cast-in-place pile in pebble bed, 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 |
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| CN103061670A (en) | 2013-04-24 |
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