CN101545256A - Method for treating collapsed holes of bored piles by protective cylinder of steel reinforcement cage under geological conditions of silt stratification - Google Patents
Method for treating collapsed holes of bored piles by protective cylinder of steel reinforcement cage under geological conditions of silt stratification Download PDFInfo
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- CN101545256A CN101545256A CN200810050549A CN200810050549A CN101545256A CN 101545256 A CN101545256 A CN 101545256A CN 200810050549 A CN200810050549 A CN 200810050549A CN 200810050549 A CN200810050549 A CN 200810050549A CN 101545256 A CN101545256 A CN 101545256A
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Abstract
The invention discloses a method for treating collapsed holes of bored piles by a protective cylinder of a steel reinforcement cage under geological conditions of silt stratification, which belongs to the technical field of civil engineering. The method comprises the following steps: a, proving the position of a collapsed hole and the size of the collapsed hole; b, building the wall; c, putting down the protective cylinder; and d, performing the treatment between the protective cylinder and the hole wall. The method has the advantages that the fiber woven-cloth protective cylinder wrapped outside the steel reinforcement cage has simple production and convenient material selection, ensures the stability of soil at the position of the collapsed hole of a muddy clay layer, prevents the soil loosening caused by larger vibration of an impact drill and mud erosion further to prevent the collapse, achieves the continuity of the construction, and quickens construction progress. Compared with the prior iron sheet protective cylinder, the protective cylinder has low cost, and can prevent large volume reaming.
Description
Technical field
The invention belongs to the civil works technical field.
Background technology
At present, in traffic and urban construction field, it is very extensive to adopt bored pile to use as building foundation, and for example: basis or the like is built in bridge, room.Under some special geologic condition-, carry out bored pile construction as silt clay layer condition, the problems such as hole, reaming of collapsing often appear, existing job practices mostly is after the backfill more directly again pore-forming or adopts the iron sheet casing, directly pore-forming is difficult to assurance and the secondary hole of collapsing do not occur, and employing iron sheet casing cost height, and be prone to generous amount reaming, difficult quality is guaranteed.
Summary of the invention
The objective of the invention is:
Provide a kind of protective cylinder of steel reinforcement cage under the mud geological conditions, to handle the drilled pile hole method of collapsing, its guarantee to collapse stability of hole site soil property prevents to bring soil property loosening because the bigger vibration of Churn drill and mud wash away, and causes caving in, accomplished the continuity of construction, accelerating construction progress.
Method of the present invention is:
(1) verifies the collapse hole site and the hole size that collapses: calculate the degree of depth of the front and back, hole that collapse according to borehole log, calculate the discrepancy in elevation, multiply by a pore cross section area, calculate side's amount in the hole that collapses.
(2) wall building: add the clay ball in the hole, the cone bucket type drill bit bigger with diameter dashes down at a slow speed, and the clay ball is sticked on the hole site that collapses, and recycles this method, makes up to retaining wall, and clay ball consumption is greater than the Kong Fangliang that collapses.Can corresponding retaining wall be made thicklyer, bore when treating secondary drilling and remove.
(3) following casing: measure respective production after the degree of depth and be about the protective cylinder of steel reinforcement cage of 0.5-2 rice, outside reinforcing cage, wrap up in fiber weaving cloth and make casing than the degree of depth bottom the hole that collapses.When secondary drilling depth during, transfer big mud balance, the protection retaining wall greater than casing length.Utilize casing under the loop wheel machine then, casing is fixed with electric welding at well head behind the rigging out.
(4) processing between casing and hole wall: add some clay balls once more and enter space between casing and hole wall, transfer big mud balance, slowly boring, boring are finished the back rig downtime and precipitates fixingly more than 1 hour, press normal speed then and construct.
The present invention to the fabrication scheme of casing is:
Outside reinforcing cage, wrap up in fiber weaving cloth and make casing.
The invention has the beneficial effects as follows:
Reinforcing cage is wrapped up in the fiber weaving cloth casing outward and is made simply, draws materials conveniently, has guaranteed the collapse stability of hole site soil property of silt clay layer, prevent to bring soil property loosening because the bigger vibration of Churn drill and mud wash away, cause caving in, accomplished the continuity of construction, accelerating construction progress.Compare with original iron sheet casing, cost is low, and can prevent generous amount reaming.
Description of drawings
Fig. 1 is a casing vertical view of the present invention;
Fig. 2 is a casing front view of the present invention.
The specific embodiment
As shown in the figure, the 1st, main muscle, the 2nd, stirrup, the 3rd, fiber weaving cloth.
On the silt clay layer, carry out bored pile construction, profound 9 meters of castinplace pile, 5 meters of diameters have at liftoff surperficial 6 meters and to cave in.
(1) verifies the collapse hole site and the hole size that collapses: calculate the degree of depth of the front and back, hole that collapse according to borehole log, calculate the discrepancy in elevation, multiply by a pore cross section area, probably calculate side's amount in the hole that collapses.
(2) wall building: add 2-10 centimetre of clay ball of diameter in the hole, the cone bucket type drill bit bigger with diameter dashes down at a slow speed, and the clay ball is sticked on the hole site that collapses, and recycles this method, makes up to retaining wall, and clay ball consumption is greater than the Kong Fangliang that collapses.Can corresponding retaining wall be made thicklyer, bore when treating secondary drilling and remove.
(3) following casing: measure respective production after the degree of depth and be about 1 meter protective cylinder of steel reinforcement cage, outside reinforcing cage, wrap up in fiber weaving cloth and make casing than the degree of depth bottom the hole that collapses.When secondary drilling depth during, transfer big mud balance, the protection retaining wall greater than casing length.Utilize casing under the loop wheel machine then, note this moment utilizing fender pile to determine the center of pile foundation, alignd with it in the casing center, guarantee the accurate of casing position of sound production.Casing is fixed with electric welding at well head behind the rigging out.
(4) processing between casing and hole wall: be certain to leave the space for guaranteeing the casing lifting smoothly, installing between back casing and hole wall, as not handling, mud will enter the space and soak retaining wall, and hole once more might collapse after long-time the immersion.Therefore adding some clay balls once more enters the space, transfers big mud balance, slowly boring, and rig downtime precipitated more than 1 hour and fixes after boring was finished, then by the normal speed construction.
Reinforcing cage is wrapped up in colour bar fiber weaving cloth casing outward, by an aperture greater than design stake footpath and greater than the reinforcing cage of bit diameter, coated outside colour bar cloth is made and formed.The length of reinforcing cage and main muscle spacing are formulated according to on-site actual situations, and main muscle diameter is at Φ more than 22.
Have good flexing resistance, fold resistance according to reinforcing bar, can prevent distortion, play fixing effect than the ambient pressure that bears of big limit.Colour bar is furnished with excellent waterproofness, and toughness is stronger.
Claims (2)
1, a kind of protective cylinder of steel reinforcement cage is handled the drilled pile hole method of collapsing under the mud geological conditions, and its method is:
A, verify the collapse hole site and the hole size that collapses: calculate the degree of depth before and after the hole that collapses according to borehole log, calculate the discrepancy in elevation, multiply by a pore cross section area, calculate side's amount in the hole that collapses;
B, wall building: add the clay ball in the hole, the cone bucket type drill bit bigger with diameter dashes down at a slow speed, and the clay ball is sticked on the hole site that collapses, recycle this method, make up to retaining wall, clay ball consumption is greater than the Kong Fangliang that collapses, can corresponding retaining wall be made thicklyer, bore when treating secondary drilling and remove;
C, following casing: measure respective production after the degree of depth is about 0.5-2 rice than the degree of depth bottom the hole that collapses protective cylinder of steel reinforcement cage, outside reinforcing cage, wrap up in fiber weaving cloth and make casing, when secondary drilling depth during greater than casing length, transfer big mud balance, the protection retaining wall, utilize casing under the loop wheel machine then, casing is fixed with electric welding at well head behind the rigging out;
Processing between d, casing and hole wall: add some clay balls once more and enter space between casing and hole wall, transfer big mud balance, slowly boring, boring are finished the back rig downtime and precipitates fixingly more than 1 hour, press normal speed then and construct.
2, under the mud geological conditions, handle the drilled pile hole method of collapsing according to the described a kind of protective cylinder of steel reinforcement cage of claims, it is characterized in that: outside reinforcing cage, wrap up in fiber weaving cloth and make casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100505496A CN101545256B (en) | 2008-03-28 | 2008-03-28 | Method for treating hole collapse of drilled pile under geological condition of mud layer by using reinforcement cage protecting cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100505496A CN101545256B (en) | 2008-03-28 | 2008-03-28 | Method for treating hole collapse of drilled pile under geological condition of mud layer by using reinforcement cage protecting cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101545256A true CN101545256A (en) | 2009-09-30 |
| CN101545256B CN101545256B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100505496A Active CN101545256B (en) | 2008-03-28 | 2008-03-28 | Method for treating hole collapse of drilled pile under geological condition of mud layer by using reinforcement cage protecting cylinder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518130A (en) * | 2011-12-29 | 2012-06-27 | 中铁上海工程局华海工程有限公司 | Reinforcement cage cement plaster pile casing for sea reclamation fill geological basement and construction process thereof |
| CN104863126A (en) * | 2015-06-11 | 2015-08-26 | 云南建工基础工程有限责任公司 | Collapse hole treatment method of large-diameter bored pile using pressure grouting technology |
| CN110670584A (en) * | 2019-09-05 | 2020-01-10 | 中冶交通建设集团有限公司 | Cast-in-situ bored pile and construction method thereof |
| CN111042124A (en) * | 2019-12-09 | 2020-04-21 | 江苏省地质矿产局第三地质大队 | Multifunctional pile casing suitable for sludge bottom layer and construction method adopting pile casing |
| CN112962585A (en) * | 2021-01-22 | 2021-06-15 | 中交四航局第六工程有限公司 | Curtain method retaining wall cast-in-place pile construction method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120915C (en) * | 2001-04-11 | 2003-09-10 | 曹兴明 | Secondary hole forming method for collapsed base of extruded pile wall |
| CN100363560C (en) * | 2005-11-15 | 2008-01-23 | 陈玉恒 | Method for treating collapsed road surface around inspection-pit for underground lines |
-
2008
- 2008-03-28 CN CN2008100505496A patent/CN101545256B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518130A (en) * | 2011-12-29 | 2012-06-27 | 中铁上海工程局华海工程有限公司 | Reinforcement cage cement plaster pile casing for sea reclamation fill geological basement and construction process thereof |
| CN102518130B (en) * | 2011-12-29 | 2014-12-17 | 中铁上海工程局集团华海工程有限公司 | Manufacturing method of and construction process of reinforcement cage cement plaster pile casing |
| CN104863126A (en) * | 2015-06-11 | 2015-08-26 | 云南建工基础工程有限责任公司 | Collapse hole treatment method of large-diameter bored pile using pressure grouting technology |
| CN104863126B (en) * | 2015-06-11 | 2016-08-17 | 云南建工基础工程有限责任公司 | Use the method that Grouting Technology processes large diameter bored pile collapse hole |
| CN110670584A (en) * | 2019-09-05 | 2020-01-10 | 中冶交通建设集团有限公司 | Cast-in-situ bored pile and construction method thereof |
| CN111042124A (en) * | 2019-12-09 | 2020-04-21 | 江苏省地质矿产局第三地质大队 | Multifunctional pile casing suitable for sludge bottom layer and construction method adopting pile casing |
| CN112962585A (en) * | 2021-01-22 | 2021-06-15 | 中交四航局第六工程有限公司 | Curtain method retaining wall cast-in-place pile construction method |
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| CN101545256B (en) | 2012-05-23 |
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