CN101173516B - Method for preventing slurry leakage and hole collapse of large-diameter deep-borehole cast-in-situ bored pile by casting curtain method - Google Patents
Method for preventing slurry leakage and hole collapse of large-diameter deep-borehole cast-in-situ bored pile by casting curtain method Download PDFInfo
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- CN101173516B CN101173516B CN2007101685167A CN200710168516A CN101173516B CN 101173516 B CN101173516 B CN 101173516B CN 2007101685167 A CN2007101685167 A CN 2007101685167A CN 200710168516 A CN200710168516 A CN 200710168516A CN 101173516 B CN101173516 B CN 101173516B
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Abstract
The invention discloses a method of grout curtain to prevent mud leakage and hole collapse of the large diameter deep hole bored cast-in-place pile. A grouting locating ring is arranged on the outside of the steel casing of the bored pile. A plurality of holes are drilled along the circumference at intervals between the steel casing grouting locating ring and the grouting holes are injected with cement slurry. The slurry completely spreads and fills gaps and is fixedly connected with a loose permeable layer, which can form a high strength waterproof curtain. The method can solve the problems of the mud leakage and hole collapse of the large diameter deep hole bored cast-in-place pile. The cement slurry is injected into the loose permeable layer and is fixedly mixed with the loose permeable layer to fill gaps and form a ring of high strength stop water curtain. The invention has the advantages that plugging results are good, problems are solved completely, the problems of mud leakage and hole collapse will not happen again in subsequent construction, the construction speed is rapid, input is low, incident handling costs can be greatly reduced. Meanwhile, the method can be applied to prevent the incidents of mud leakage and hole collapse while loose permeable layers of silty sand, drift sand, pebble soil and other soil are drilled.
Description
Technical field
The invention belongs to the large-diameter deep-borehole cast-in-situ bored pile job practices, be specifically related to the method in a kind of grouting curtain method control large-diameter deep-borehole cast-in-situ bored pile spillage and the hole that collapses.
Background technology
Along with developing rapidly of Bridges in Our Country construction, the large-diameter deep-borehole cast-in-situ bored pile bridge foundation is widely adopted.Its construction is limited by site plant and geological conditions, the steel casing often can not be inserted and beat deeply to waterproof dense layer, when in loose pervious layers such as flour sand, quicksand, land pebble, creeping into, easy spillage, slurry is in time mended by the very fast or tidal region of, rate of penetration bad as on-the-spot mud control indexes makes in the hole head height not enough, even the more serious hole accident of collapsing can occur.Spillage appears in large-diameter deep-borehole cast-in-situ bored pile and the processing method of hole accident routine of collapsing has following several: strengthen concentration of hydraulic mixture, throw in the hole and bury sawdust and cement carries out leak stopping; The mixture of backfill slabstone and clay is to the last 1～2m in place, hole that collapses, with impacting the compacted hole wall of awl repeated stock; The mixture of backfill sand and clay to the hole site that collapses treat backfill leave standstill closely knit after again boring.Conventional treatment method exists length consuming time, expense height, follow-up boring still may spillage take place once more or shortcoming such as the hole that collapses.
Summary of the invention
The object of the present invention is to provide a kind of speed of application fast, the grouting curtain method control large-diameter deep-borehole cast-in-situ bored pile spillage that expense is low and the method in the hole that collapses are to address the above problem.
Technical scheme of the present invention is: it is a backfill sand in drilled pile steel casing, in steel casing peripheral planar 1～4 circle is set, facade is provided with 1 to 3 layer of slip casting centring ring at interval, in order to the fixing drilling rod of geological drilling rig, between steel casing and slip casting centring ring, bore injected hole with geological drilling rig along the circle spacing, injected hole extends 1～2 meter of waterproof closely knit soil layer, adopt mudjack, pressure with 0.2～0.5MPa, by drilling rod is bottom-up injected hole is pursued hole slip casting, cement paste is fully diffused in the weak pervious layer soil by soil crack, finish when slip casting mouth 1m at the bottom of the steel casing is above, the compressive strength for the treatment of cement paste reaches 3MPa when above, forms the higher water protecting curtain of intensity in steel casing outer ring.
By drilling rod is bottom-up injected hole is pursued hole slip casting, the pressure according to mudjack in the slip casting process changes, and promotes drilling rod with the speed that is no more than 0.5m/min, finishes until slip casting.
In every circle slip casting centring ring injected hole is set all.
Described centring ring to the width or the width between the centring ring of steel casing is: 0.15～0.5 meter.
This method can be handled the spillage of large-diameter deep-borehole cast-in-situ bored pile and the hole accident of collapsing, its cement paste slurry injects loose pervious layer, and mixing fixedly with it, blind has formed a circle intensity higher water-stop curtain, plugging effect is good, handle thoroughly, accident such as the hole that collapses spillage can not appear and in follow-up construction again, and speed of application is fast, less investment, the disposal cost of reduction accident greatly.This method can also be used for preventing spillage and the appearance of the hole accident of collapsing when loose pervious layers such as flour sand, quicksand, land pebble creep into simultaneously.
Description of drawings
Injected hole and centring ring layout schematic diagram during the construction of accompanying drawing grouting curtain method.
The specific embodiment
Present embodiment is used for the explanation to claim of the present invention, and protection scope of the present invention is not limited to the description of the following example.
As shown in drawings, the periphery of steel casing 2 is provided with slip casting centring ring 3, and slip casting centring ring 3 planar can be provided with 1～4 circle, 1 to 3 layer of facade space set.Bore injected hole 1 along the circle spacing in the slip casting centring ring 3.
Concrete construction is as follows:
1, in the accident hole, is backfilled to spillage or the above 1m in the hole site that collapses with sand;
2, lay 2～3 road injected hole drilling rod centring rings 3 in steel casing 2 outsides, centring ring 3 is annulus concentric with steel casing 2, diameter is a centring ring than the big 0.3～1m of steel casing 2 diameters: 0.15～0.5 meter, injected hole 1 is evenly arranged in steel casing 2 borders, the pitch of holes of adjacent injected hole 1 is no more than 0.5m, and injected hole 1 drilling rod is fixed on the centring ring 3.
3, adopt geological drilling rig to bore aperture in injected hole 1 position until waterproof dense layer 1～2m, the system cement paste is mixed at the scene, carry out slip casting with mudjack by drilling rod is bottom-up, grouting pressure is controlled between 0.2～0.5MPa, it is fixed that cement paste is fully spread with weak pervious layer, change slowly lifting drilling rod according to pressure in the slip casting process, the drilling rod hoisting velocity is no more than 0.5m/min, slip casting finishes more than 2 end of steel casing mouth 1m, i.e. institute's slip casting highly is not less than at the bottom of the steel casing 1 meter of the above height of mouth.
4, carry out operation by the hole by ring, finish up to all injected hole 1 slip castings.Treat that cement paste compressive strength reaches more than the 3MPa, at this moment, form the higher water protecting curtain of intensity in steel casing outer ring.Water protecting curtain can prevent spillage effectively, and the hole that collapses is realized administering.Recover drilling construction again.
Claims (4)
1. the method in the grouting curtain method control large-diameter deep-borehole cast-in-situ bored pile spillage and the hole that collapses, it is a backfill sand in drilled pile steel casing, in steel casing peripheral planar 1～4 circle is set, facade is provided with 1 to 3 layer of slip casting centring ring at interval, in order to the fixing drilling rod of geological drilling rig, between steel casing and slip casting centring ring, bore injected hole with geological drilling rig along the circle spacing, injected hole extends 1～2 meter of waterproof closely knit soil layer, adopt mudjack, pressure with 0.2～0.5MPa, by drilling rod is bottom-up injected hole is pursued hole slip casting, cement paste is fully diffused in the weak pervious layer soil by soil crack, finish when slip casting mouth 1m at the bottom of the steel casing is above, the compressive strength for the treatment of cement paste reaches 3MPa when above, forms the higher water protecting curtain of intensity in steel casing outer ring.
2. the method in the grouting curtain method control large-diameter deep-borehole cast-in-situ bored pile spillage and the hole that collapses according to claim 1, it is characterized in that describedly injected hole being pursued hole slip casting by drilling rod is bottom-up, change slowly lifting drilling rod according to pressure in the slip casting process, promote drilling rod with the speed that is no more than 0.5m/mi n, finish until slip casting.
3. the method in the grouting curtain method control large-diameter deep-borehole cast-in-situ bored pile spillage and the hole that collapses according to claim 1 is characterized in that in every circle slip casting centring ring injected hole being set all.
4. the method in the grouting curtain method control large-diameter deep-borehole cast-in-situ bored pile spillage and the hole that collapses according to claim 1 is characterized in that centring ring to the width or the width between the centring ring of steel casing is: 0.15～0.5 meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101685167A CN101173516B (en) | 2007-11-29 | 2007-11-29 | Method for preventing slurry leakage and hole collapse of large-diameter deep-borehole cast-in-situ bored pile by casting curtain method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101685167A CN101173516B (en) | 2007-11-29 | 2007-11-29 | Method for preventing slurry leakage and hole collapse of large-diameter deep-borehole cast-in-situ bored pile by casting curtain method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101173516A CN101173516A (en) | 2008-05-07 |
| CN101173516B true CN101173516B (en) | 2010-10-06 |
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| CN2007101685167A Active CN101173516B (en) | 2007-11-29 | 2007-11-29 | Method for preventing slurry leakage and hole collapse of large-diameter deep-borehole cast-in-situ bored pile by casting curtain method |
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| CN102535457B (en) * | 2012-03-07 | 2014-05-28 | 中铁十局集团有限公司 | Method for treating slurry leakage of perforated holes of offshore pile foundation in process of utilizing steel casing to carry out pile foundation construction |
| CN103696775B (en) * | 2013-12-20 | 2016-02-24 | 中煤第五建设有限公司 | The descending slip casting method of the high many group aquifer segmentations of large section |
| CN105156017B (en) * | 2015-08-12 | 2017-10-10 | 中铁三局集团有限公司 | A kind of impacting with high pressure whitewashing rig for applying to collapse hole stratum and construction method |
| CN107859034B (en) * | 2017-11-14 | 2019-07-26 | 中铁十一局集团第一工程有限公司 | Large diameter pile foundation spillage immediate processing method |
| CN108169100B (en) * | 2018-01-17 | 2020-10-30 | 长安大学 | Device and method for in-situ measurement of rainfall infiltration parameters |
| CN109209287B (en) * | 2018-09-12 | 2019-12-27 | 中国矿业大学 | Sectional curtain grouting construction method for fault working face with overlarge inclination angle of vertical shaft |
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| CN110130328B (en) * | 2019-05-09 | 2021-06-11 | 中铁四局集团第二工程有限公司 | Drilling chemical leakage stopping method applied to construction of overwater drilling pile |
| CN111851480B (en) * | 2020-07-30 | 2022-06-21 | 上海市机械施工集团有限公司 | Cast-in-place pile construction method |
| CN112127831B (en) * | 2020-08-24 | 2022-11-22 | 青海凹口凸钾镁盐技术有限公司 | Construction method of brine recovery well in salt lake |
| CN113550306A (en) * | 2021-07-22 | 2021-10-26 | 江西基业科技集团有限公司 | Earth-rock wall protection construction method |
| CN113882398A (en) * | 2021-10-12 | 2022-01-04 | 中铁七局集团郑州工程有限公司 | Grouting reinforcement construction method for pile foundation casing of water-rich sand gravel soil layer |
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Owner name: GROUP CO., LTD., ZHONGTIE DAQIAO BUREAU Free format text: FORMER OWNER: CHINA ZHONGTIE MAJOR BRIDGE ENGINEERING CO., LTD. Effective date: 20150211 |
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Effective date of registration: 20150211 Address after: 430050 Hanyang Road, Hanyang District, Hubei, No. 38, No. Patentee after: Group Co., Ltd., Zhongtie Daqiao Bureau Address before: 430050 Hanyang Road, Hanyang District, Hubei, No. 38, No. Patentee before: China Zhongtie Major Bridge Engineering Co., Ltd. |