CN102108701B - Method for reinforcing soil at periphery of column by non-pressure grouting - Google Patents
Method for reinforcing soil at periphery of column by non-pressure grouting Download PDFInfo
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- CN102108701B CN102108701B CN 200910312503 CN200910312503A CN102108701B CN 102108701 B CN102108701 B CN 102108701B CN 200910312503 CN200910312503 CN 200910312503 CN 200910312503 A CN200910312503 A CN 200910312503A CN 102108701 B CN102108701 B CN 102108701B
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Abstract
The invention discloses a method for reinforcing soil at the periphery of a column by non-pressure grouting. The method comprises the following steps: firstly drilling grouting holes on soil at the periphery of a pile to be reinforced, and then grouting cement paste into the grouting hole by adopting a non-pressure automatic flow manner, thus the soil at the periphery of the column is reinforced. Compared with the traditional reinforcing method, the method disclosed by the invention is both effective and economic, and cheap cement paste is adopted as a reinforcing material, thus the cost is greatly reduced; the non-pressure automatic flow grouting manner is adopted in the invention, the process and the machines and tools are simpler, and the construction period is only half of the construction period of a high pressure grouting method; and grout slipping and grout overflowing produced in a high pressure injecting process can be reduced. The method disclosed by the invention is applicable to solidification on the soil at the periphery of the pile and is also applicable to reinforcement on other foundation soils.
Description
Technical field
The present invention relates to a kind of embankment consolidation technology, particularly a kind of method of not having pressure injection slurry reinforced column week soil.
Background technology
At present, embankment consolidation is adopted chemical stabilization and high-pressure slip-casting method usually.Chemical stabilization need adopt the raw materials of industry such as dual liquid type mixed serum of alkali lye or cement and water glass, and cost is higher, but also needs to consider the problem of environmental pollution.The high-pressure slip-casting method occurs race easily and starches, emits phenomenons such as slurry, and result of use is not very desirable.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of with low cost, technology simple, can reduce all native methods of no pressure injection slurry reinforced column of running slurry and emitting the slurry phenomenon, thereby overcome the deficiencies in the prior art.
For solving the problems of the technologies described above technical scheme of the present invention: the method for all soil of no pressure injection slurry reinforced column.This method is earlier at all earth boring auger injected holes of stake that will reinforce, adopts then and does not have the gravity flow mode of pressure grout injection in injected hole.
Above-mentioned no pressure injection slurry reinforced column week soil method in, the order of boring injected hole is the subdrilling outer ring, then bores inner ring, bores mesosphere at last.
In the method for all soil of aforesaid no pressure injection slurry reinforced column, the injected hole spacing is 1.65m, and the denseness of cement paste is 750kg/m3.
Aforesaid no pressure injection slurry reinforced column week soil method in, in the grout injection process, carry out perfusion at intermittence and irritate for inhaling the big injected hole of slurry amount more, then irritate less inhaling the little injected hole of slurry amount, can see the water level that 1～2m is dark after making each injected hole process slip casting.
For verifying effect of the present invention, the applicant has carried out a large amount of experiments, and the result is as follows:
The large-scale groove jar of one row of experiment one, certain engineering of area, zunyi, guizhou province, its basis is 37 circular cushion caps (diameter 17.2m).Owing in the backfill place, adopt method of the present invention to hole and afterwards do not have the construction of the step of pressure injection slurry, make stake week native fixed according to elder generation.Reinforce existing a year and a half so far, groove jar ground is all right; The reinforcing expense through examine for: 49 yuan of average 1m3 soil costs only are 27% of chemical stabilization (180 yuan of unit prices) expense, also only are 33% of high-pressure slip-casting method (150 yuan of unit prices) expense.
Experiment two, reinforcement experiment are to liking the clump of piles of circular cushion cap.Bore injected hole by method of the present invention, order is probing outer ring earlier, then bores inner ring, bores mesosphere at last.The spacing of wells is determined with reference to standard.Current test, the grouting of still pressurizeing during beginning when pressure reaches 0.2～0.3Mpa, slurry occurs emitting around the grout hole, and promptly automatically unloading is to zero.Analysis occurs emitting the reason of slurry to be: the composition of place backfill is clay, rubble and piece stone, an a large amount of silt particle band that draw water for a long time when constructing stake deeply and are washed away, remainingly in the backfill layer be mostly the skeleton that particle is thicker, void content is big, so that grouting reaches lower pressure and just run the slurry release.Thus, no longer pressurization grouting but carry out large tracts of land and do not have the pressure injection slurry of test.In the slip casting process, send full-time staff's touring observation beyond range of grouting, see that the cement paste of perfusion has other passage of having no way of, crack to flow away.Observe round the clock through 4, do not see the spillage phenomenon, show that cement paste is to be poured in the effective scope.Check after slip casting is finished: excavation sees that obviously fresh cement paste is arranged in the packing course during 1～2m, between soil layer, bond finely between rubble and between stone.And when the slip casting of border, find that most of boring has full slurry phenomenon.Can think that in view of the above no pressure injection slurry has reached the effect of design anticipation.
Beneficial effect of the present invention: compared with prior art, not only effectively but also economical, it adopts cheap cement paste was reinforcement material to method of the present invention, and without alkali lye, also without the dual liquid type mixed serum of cement and water glass, cost reduces greatly.The present invention adopts the grouting way of do not have pressing gravity flow, and technology and facility are simpler, and the construction period has only half of high-pressure mortar spraying method duration, and can reduce race slurry that the high-pressure injection method occurred, emits the slurry phenomenon.The present invention is applicable to that stake week is native fixed, also can be applicable to the reinforcing of other foundation soils.
The present invention is further illustrated below in conjunction with the specific embodiment.
The specific embodiment
Embodiment 1.Elder generation adopts then and does not have the gravity flow mode of pressure grout injection in injected hole at all earth boring auger injected holes of stake that will reinforce, and all soil of stake is reinforced.The order of boring injected hole is the subdrilling outer ring, can control the grouting scope of stake week soil like this, then bores inner ring, with according to actual conditions outer, that inner ring probing finding is grasped the place backfill, bores mesosphere at last.The injected hole spacing determines that with reference to standard be generally 1.0m～2.0m, the bound of numerical value differs greatly, the present invention by actual conditions through scrutinizing preferably 1.65m.The denseness of cement paste is 750kg/m3, i.e. 1m3 cement paste cement 750kg, and (1m3 cement paste cement 620kg) is thicker than high-pressure slip-casting method.In the grout injection process, carry out perfusion at intermittence and irritate more, then irritate less, can see that through after the slip casting the dark water level of 1～2m serves as effective finally to reach each injected hole to inhaling the little injected hole of slurry amount for inhaling the big injected hole of slurry amount.
Embodiments of the present invention are not limited to the foregoing description, and the various variations of making under the prerequisite that does not break away from aim of the present invention all belong within protection scope of the present invention.
Claims (2)
1. a method of not having pressure injection slurry reinforced column week soil is characterized in that: earlier at all earth boring auger injected holes of stake that will reinforce, adopt then and do not have the gravity flow mode of pressure grout injection in injected hole; The order of boring injected hole is the subdrilling outer ring, then bores inner ring, bores mesosphere at last; The injected hole spacing is 1.65m, and the denseness of cement paste is 750kg/ m3.
2. the method for all soil of no pressure injection slurry reinforced column according to claim 1, it is characterized in that: in the grout injection process, carry out perfusion at intermittence and irritate for inhaling the big injected hole of slurry amount more, then irritate less inhaling the little injected hole of slurry amount, make each injected hole can see the water level that 1～2m is dark through after the slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910312503 CN102108701B (en) | 2009-12-29 | 2009-12-29 | Method for reinforcing soil at periphery of column by non-pressure grouting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910312503 CN102108701B (en) | 2009-12-29 | 2009-12-29 | Method for reinforcing soil at periphery of column by non-pressure grouting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102108701A CN102108701A (en) | 2011-06-29 |
| CN102108701B true CN102108701B (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910312503 Expired - Fee Related CN102108701B (en) | 2009-12-29 | 2009-12-29 | Method for reinforcing soil at periphery of column by non-pressure grouting |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362116A (en) * | 2013-07-02 | 2013-10-23 | 镇江市城乡建设基础工程有限公司 | Construction method of foundation compaction grouting |
| CN106192987B (en) * | 2016-08-01 | 2018-08-10 | 山西四建集团有限公司 | It is a kind of to be crushed the construction method that geology is reinforced to stake periphery |
| CN108487229A (en) * | 2018-03-28 | 2018-09-04 | 贵州省地质矿产勘查开发局111地质大队 | Artificial pore-forming method after strong rock-soluble foundation pre-grouting treatment |
| CN110410079B (en) * | 2019-08-02 | 2020-09-18 | 中煤第三建设（集团）有限责任公司 | Non-pressure grouting method based on mine construction |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500762A (en) * | 2002-11-15 | 2004-06-02 | 刘茂平 | Single plasm glue jointed filling material and using method thereof |
| CN1629406A (en) * | 2004-10-20 | 2005-06-22 | 葛扬安 | Method for treating depression watertight in hydraulic engineering by employing yellow mud grout |
| KR20060073731A (en) * | 2004-12-24 | 2006-06-29 | 한국철도기술연구원 | Amethod for solidification of railroad bridge and public works-connection part |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1060879A (en) * | 1996-08-19 | 1998-03-03 | Nippon Concrete Ind Co Ltd | Building foundation and construction method thereof |
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2009
- 2009-12-29 CN CN 200910312503 patent/CN102108701B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500762A (en) * | 2002-11-15 | 2004-06-02 | 刘茂平 | Single plasm glue jointed filling material and using method thereof |
| CN1629406A (en) * | 2004-10-20 | 2005-06-22 | 葛扬安 | Method for treating depression watertight in hydraulic engineering by employing yellow mud grout |
| KR20060073731A (en) * | 2004-12-24 | 2006-06-29 | 한국철도기술연구원 | Amethod for solidification of railroad bridge and public works-connection part |
Non-Patent Citations (3)
| Title |
|---|
| 灌浆加固地基的实践;贾美珍;《山西建筑》;20050930;第31卷(第17期);第85-86页 * |
| 罗杰华,王勇.砂砾石基础帷幕灌浆防渗在垅港大坝围堰基础防渗中的应用.《江西水利科技》.2008,第34卷第49-50页. * |
| 贾美珍.灌浆加固地基的实践.《山西建筑》.2005,第31卷(第17期),第85-86页. |
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| CN102108701A (en) | 2011-06-29 |
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