CN102535457A - Method for treating slurry leakage of perforated holes of offshore pile foundation in process of utilizing steel casing to carry out pile foundation construction - Google Patents
Method for treating slurry leakage of perforated holes of offshore pile foundation in process of utilizing steel casing to carry out pile foundation construction Download PDFInfo
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- CN102535457A CN102535457A CN2012100578012A CN201210057801A CN102535457A CN 102535457 A CN102535457 A CN 102535457A CN 2012100578012 A CN2012100578012 A CN 2012100578012A CN 201210057801 A CN201210057801 A CN 201210057801A CN 102535457 A CN102535457 A CN 102535457A
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Abstract
The invention discloses a method for treating slurry leakage of perforated holes of an offshore pile foundation in a process of utilizing a steel casing to carry out pile foundation construction, belonging to the technical field of bridge construction. The method comprises the following steps of: (1) carrying out clay backfilling on slurry-leaking pile holes and impacting and compacting to be 1-2 meters above a lower opening of the steel casing by an impact drill; (2) dumping and filling slab stones or sand bags to the periphery of the steel casing according to the height difference between a river bed and soil on the periphery of the steel casing, wherein after the dumping and the filling, the elevation is higher than that of the soil on the periphery; (3) adding cement and clay into the steel casing and agitating and mixing the clay and the cement slurry in the steel casing by a hammer head of the impact drill; slowly drilling to be 3-4 meters below the lower opening of the steel casing and blending the mixed slurry of the clay and the cement by utilizing a method of pulling the hammer head of the impact drill up and down so as to permeate the mixed slurry into slurry-leakage parts; and (4) standing and drilling the solidified mixed slurry to form holes. According to the method provided by the invention, the steel casing does not need to be reorganized to carry out secondary construction, the construction time is short and the construction cost is low, thereby effectively accelerating the construction progress and reducing the temporary project cost.
Description
Technical field
The present invention relates to a kind of a kind of processing method when the perforation spillage appears in the deep water pile foundation when adopting the steel casing to carry out pile foundation construction, belong to technical field of bridge construction.
Background technology
Along with Chinese economic development, bridge constructions such as over strait, rivers bridge, grand bridge are also more and more.Adopt of deep water pile foundation buried the construction that the steel casing carries out pile foundation underground more in the bridge construction at present.But because the fluctuation tide makes the inside and outside hydraulic pressure of steel casing constantly change and percussion drilling makes steel casing end opening soil property layer stability reduce; When causing drilled pile construction; Steel casing end opening position spillage in various degree very easily occurs and oozes slurry in the process of creeping into, cause the interruption of pile foundation construction.At present, during this type of situation of conventional treatment, be to adopt to continue follow-up steel casing, the job practices of creeping into again again.This kind method usually needs to reorganize marching into the arena of steel casing construction corps, machinery and steel casing material, need consuming time month or longer time, and further increase the temporary works cost, requires to disagree with the progress and the cost control of project engineering construction.
Summary of the invention
Use steel casing follow-up spreading construction technology to existing in the prior art seriously lags behind the engineering construction progress; And cost is high; The defective that benefit is low the invention provides a kind of need not the to reorganize construction of steel casing secondary, the construction technology that cost is low and simple and practical.
The present invention realizes through following technical scheme: it adopts following steps:
(1) clay backfilling is carried out in spillage stake hole, and with the above 1-2 rice of Churn drill shock compaction to steel casing end opening;
(2) according to the discrepancy in elevation of the riverbed and the steel casing periphery soil body, around the steel casing, throw washer stone or sand pocket, throwing is filled out the back absolute altitude and is higher than peripheral soil body absolute altitude;
(3) in the steel casing, add cement and clay; With the Churn drill tup clay in the steel casing and cement grout are mixed; And creep at a slow speed to the following 3-4 rice of steel casing end opening; Use down the method mediation clay of pulling Churn drill tup and the mixed serum of cement again, make mixed serum infiltrate the spillage place;
(4) leave standstill drilling and forming hole again after mixed serum is fixed.
The present invention be utilize mixing mud that cement and clay form through drilling construction make it fully to infiltrate into steel casing end opening place spillage, ooze in the slit between the soil layer particle of slurry; The fixed back of mixing mud is an one with the soil consolidation at spillage place, reaches the purpose of preventing spillage, oozing slurry.After mixing mud is fixed, can continue to creep into operation until accomplishing the stake hole.In pile foundation construction, according to being prone to loosening position for soil layer in the practical experience steel casing end opening 3-4 rice scope.
Mixed serum for the ease of clay and cement fully infiltrates spillage, oozes the slurry place, and the cement that is added in the step (3) is that match ratio is the mud of 55kg/m3, and the volume ratio of clay amount and mud amount is 1: 10.
In order to reach same purpose, should control mud balance in the step (3) is 1.34-1.45, and preferred mud balance is 1.4.Through the control mud balance, make the hydraulic pressure of the interior hydraulic pressure of steel casing, so that mixed serum fully infiltrates spillage, oozes the slurry place greater than the outside.
The invention has the beneficial effects as follows: job practices of the present invention is simple, need not reorganize the construction of steel casing secondary, and the engineering time is short, and construction cost is low, effectively accelerating construction progress and reduction temporary works cost.
Description of drawings
Fig. 1 is the construction sketch map of the specific embodiment of the invention;
Among the figure: 1, steel casing, 2, the riverbed, 3, soil layer, 4, mixed serum, 5, slabstone or sand pocket pile up material.
The specific embodiment
Below through non-limiting embodiment and combine accompanying drawing that the present invention is further described:
Shown in accompanying drawing; When steel casing 1 end opening spillage occurs, oozes when slurry; Earlier clay backfilling is carried out in this spillage stake hole; The above 2-3 rice of clay backfilling to steel casing 1 end opening is advisable, and uses the drill hammer shock compaction to the above 1-2 rice of steel casing 1 end opening, so that the temporary transient fixing steel casing 1 end opening position soil layer 3 that is prone to collapse.
The discrepancy in elevation situation of the riverbed 2 and the peripheral soil body around the measurement steel casing 1; As do not have the obvious discrepancy in elevation, and can use and add an amount of clay and strengthen mud balance, the method for carrying out mud off again handles that (consumption of clay is not so that mud hinders tup freely to rotate is advisable; About mud balance 1.5); Or suitably carry out the throwing of slabstone or sand pocket on every side at steel casing 1 and fill out, around steel casing 1, form slabstone or sand pocket and pile up material 5, play the effect that stabilized steel protects 1 surrounding soil.As the discrepancy in elevation of riverbed 2 and the peripheral soil body is big or certain is bigger than other limit discrepancy in elevation on one side on every side; Then need according to discrepancy in elevation situation; Throw washer stone or sand pocket in a large number at problem stake periphery or lower one side; Throwing is filled out the back absolute altitude and is higher than peripheral soil body absolute altitude, fully reaches the effect of stabilized steel casing 1 surrounding soil.The time of throwing washer stone or sand pocket can make filling can fill up the position that subsides more accurately when should be chosen in slack tide like this, and the entrained sand of fluctuation capable of using tide tidewater is filled up the space between slabstone or the sand pocket.
When being chosen in lowest water level, in the steel casing 1 that backfill is accomplished, add an amount of cement and clay, cement amount is that the mud of 55kg/m3 is advisable with the match ratio, and the ratio of clay amount and mud amount is advisable with volume ratio at 1: 10.Utilize the Churn drill tup that clay and cement grout in the steel casing 1 are stirred, are in harmonious proportion and form mixed serum 4, and creep at a slow speed to steel casing 1 end opening 3-4 rice down.Re-use the Churn drill tup and spur up and down and be in harmonious proportion mixed serum 4, be beneficial to mixed serum 4 and infiltrate spillages, ooze in the slit between the soil layer particle of slurry.Infiltrate into the spillage place for the ease of mixed serum 4, in this process, want strict control mud balance, general mud balance is controlled at 1.35-1.45 and is advisable, and preferred mud balance is 1.4.Among the present invention, construct when being chosen in low tide, be since in this moment steel casing mud pressure be higher than an external water pressure, be convenient to also can play the function of retaining wall in the slit between the soil layer particle that cement grout infiltrates into the spillage place.After the completion, leave standstill more than 48 hours, be convenient to the fixed of mixed serum 4, mixed serum 4 at the spillage place fixed back fixed with surrounding soil be one, the purpose of reach the prevention spillage, oozing slurry.At this moment, continue to creep into operation until accomplishing the stake hole with the method for dashing slowly again.
Other parts of the present invention adopt prior art, repeat no more at this.
Claims (4)
1. method of handling pile foundation perforation spillage in the water when adopting the steel casing to carry out pile foundation construction is characterized in that: adopt following steps:
(1) clay backfilling is carried out in spillage stake hole, and with the above 1-2 rice of Churn drill shock compaction to steel casing end opening;
(2) according to the discrepancy in elevation of the riverbed and the steel casing periphery soil body, around the steel casing, throw washer stone or sand pocket, throwing is filled out the back absolute altitude and is higher than peripheral soil body absolute altitude;
(3) in the steel casing, add cement and clay; With the Churn drill tup clay in the steel casing and cement grout are mixed; And creep at a slow speed to the following 3-4 rice of steel casing end opening; Use down the method mediation clay of pulling Churn drill tup and the mixed serum of cement again, make mixed serum infiltrate the spillage place;
(4) leave standstill drilling and forming hole again after mixed serum is fixed.
2. handle the method for pile foundation perforation spillage in the water when employing steel casing according to claim 1 carries out pile foundation construction, it is characterized in that: the cement that is added in the step (3) is that match ratio is the mud of 55kg/m3, and the volume ratio of clay amount and mud amount is 1: 10.
3. handle the method for pile foundation perforation spillage in the water when employing steel casing according to claim 1 carries out pile foundation construction, it is characterized in that: the control mud balance is 1.35-1.45 in the step (3).
4. handle the method for pile foundation perforation spillage in the water when employing steel casing according to claim 3 carries out pile foundation construction, it is characterized in that: the control mud balance is 1.4 in the step (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210057801.2A CN102535457B (en) | 2012-03-07 | 2012-03-07 | Method for treating slurry leakage of perforated holes of offshore pile foundation in process of utilizing steel casing to carry out pile foundation construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210057801.2A CN102535457B (en) | 2012-03-07 | 2012-03-07 | Method for treating slurry leakage of perforated holes of offshore pile foundation in process of utilizing steel casing to carry out pile foundation construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102535457A true CN102535457A (en) | 2012-07-04 |
| CN102535457B CN102535457B (en) | 2014-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210057801.2A Expired - Fee Related CN102535457B (en) | 2012-03-07 | 2012-03-07 | Method for treating slurry leakage of perforated holes of offshore pile foundation in process of utilizing steel casing to carry out pile foundation construction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049467A (en) * | 2016-08-02 | 2016-10-26 | 中铁六局集团有限公司 | Method for treating slurry leakage of bored pile through percussion drill under complex geology |
| CN107012862A (en) * | 2017-05-10 | 2017-08-04 | 国网黑龙江省电力有限公司检修公司 | The construction of bored concrete pile foundation frost zone permanent steel pile casting and construction method |
| CN116856408A (en) * | 2023-09-04 | 2023-10-10 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173516A (en) * | 2007-11-29 | 2008-05-07 | 中铁大桥局股份有限公司 | Method for preventing slurry leakage and hole collapse of large-diameter deep-borehole cast-in-situ bored pile by casting curtain method |
-
2012
- 2012-03-07 CN CN201210057801.2A patent/CN102535457B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101173516A (en) * | 2007-11-29 | 2008-05-07 | 中铁大桥局股份有限公司 | Method for preventing slurry leakage and hole collapse of large-diameter deep-borehole cast-in-situ bored pile by casting curtain method |
Non-Patent Citations (2)
| Title |
|---|
| 侯凤彪: "海上钻孔桩施工漏浆问题预防及处理措施", 《石家庄铁道学院学报》 * |
| 江永安等: "钻孔灌注桩漏浆原因分析及处理措施探讨", 《山西建筑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049467A (en) * | 2016-08-02 | 2016-10-26 | 中铁六局集团有限公司 | Method for treating slurry leakage of bored pile through percussion drill under complex geology |
| CN107012862A (en) * | 2017-05-10 | 2017-08-04 | 国网黑龙江省电力有限公司检修公司 | The construction of bored concrete pile foundation frost zone permanent steel pile casting and construction method |
| CN116856408A (en) * | 2023-09-04 | 2023-10-10 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
| CN116856408B (en) * | 2023-09-04 | 2023-11-07 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
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| Publication number | Publication date |
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| CN102535457B (en) | 2014-05-28 |
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