CN101545256B - 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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- CN101545256B CN101545256B CN2008100505496A CN200810050549A CN101545256B CN 101545256 B CN101545256 B CN 101545256B CN 2008100505496 A CN2008100505496 A CN 2008100505496A CN 200810050549 A CN200810050549 A CN 200810050549A CN 101545256 B CN101545256 B CN 101545256B
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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 like silt clay layer condition; The problems such as hole, reaming of collapsing often appear; Mostly existing job practices be after the backfill more directly again pore-forming or adopt the iron sheet casing, and directly pore-forming is difficult to assurance and the secondary hole of collapsing do not occur, and adopts iron sheet casing cost high; 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 to become flexible because the bigger vibration of Churn drill is washed away with mud, 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: in the hole, add the clay ball, 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 process 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 the space between some clay balls entering casings and hole wall once more, transfer big mud balance, slowly boring, rig downtime precipitated more than 1 hour and fixes after boring was accomplished, then by the normal speed construction.
The present invention to the fabrication scheme of casing is:
Outside reinforcing cage, wrap up in fiber weaving cloth and process 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 the prior 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: in the hole, add 2-10 centimetre of clay ball of diameter, 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 process 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 confirm 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 get into the space and soak retaining wall, and hole once more might collapse after long-time the immersion.Therefore add some clay balls entering spaces once more, transfer big mud balance, slowly boring, rig downtime precipitated more than 1 hour and fixes after boring was accomplished, 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 limits.Colour bar is furnished with excellent waterproofness, and toughness is stronger.
Claims (1)
1. a 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: in the hole, add the clay ball, 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; Correspondingly retaining wall is made thicker, bored when treating secondary drilling and remove;
C, following casing: measure the protective cylinder of steel reinforcement cage of respective production after the degree of depth than the long 0.5-2 rice of the degree of depth bottom the hole that collapses; Outside reinforcing cage, wrap up in fiber weaving cloth and process casing; 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;
Processing between d, casing and hole wall: add the space between some clay balls entering casings and hole wall once more, transfer big mud balance, slowly boring, rig downtime precipitated more than 1 hour and fixes after boring was accomplished, then by the normal speed construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100505496A CN101545256B (en) | 2008-03-28 | 2008-03-28 | Method for treating collapsed holes of bored piles by protective cylinder of steel reinforcement cage under geological conditions of silt stratification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100505496A CN101545256B (en) | 2008-03-28 | 2008-03-28 | Method for treating collapsed holes of bored piles by protective cylinder of steel reinforcement cage under geological conditions of silt stratification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101545256A CN101545256A (en) | 2009-09-30 |
| CN101545256B true 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 collapsed holes of bored piles by protective cylinder of steel reinforcement cage under geological conditions of silt stratification |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN111042124B (en) * | 2019-12-09 | 2020-11-13 | 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 |
| CN112962585B (en) * | 2021-01-22 | 2022-10-18 | 中交四航局第六工程有限公司 | Curtain method retaining wall cast-in-place pile construction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312417A (en) * | 2001-04-11 | 2001-09-12 | 曹兴明 | Secondary hole forming method for collapsed base of extruded pile wall |
| CN1760455A (en) * | 2005-11-15 | 2006-04-19 | 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
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312417A (en) * | 2001-04-11 | 2001-09-12 | 曹兴明 | Secondary hole forming method for collapsed base of extruded pile wall |
| CN1760455A (en) * | 2005-11-15 | 2006-04-19 | 陈玉恒 | Method for treating collapsed road surface around inspection-pit for underground lines |
Non-Patent Citations (4)
| Title |
|---|
| JP特开平10-266197A 1998.10.06 |
| JP特开平11-36290A 1999.02.09 |
| 肖机卫.钻孔灌注桩施工过程中坍孔的处理方法.《南方金属》.2006,58-59. * |
| 虞传海.钻孔桩钢筋笼入孔后孔壁坍塌处理一例.《铁道建筑技术》.2002,31-32. * |
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