CN102535457B - 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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- CN102535457B CN102535457B CN201210057801.2A CN201210057801A CN102535457B CN 102535457 B CN102535457 B CN 102535457B CN 201210057801 A CN201210057801 A CN 201210057801A CN 102535457 B CN102535457 B CN 102535457B
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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 perforation spillage appears in pile foundation in deep water in the time adopting steel casing to carry out pile foundation construction, belong to technical field of bridge construction.
Background technology
Along with China's expanding economy, the bridge constructions such as over strait, rivers bridge, grand bridge are also more and more.At present in bridge construction, adopt of pile foundation in deep water buried steel casing underground and carried out the construction of pile foundation more.But because fluctuation tide makes inside and outside steel casing hydraulic pressure constantly change and percussion drilling reduces steel casing end opening soil layer stability, while causing drilled pile construction, very easily in the process of creeping into, there is spillage in various degree and ooze slurry, cause the interruption of pile foundation construction in steel casing end opening position.At present, when this type of situation of conventional treatment, be to adopt to continue follow-up steel casing, then the construction method of again creeping into.This kind of method, need to reorganize marching into the arena of steel casing construction corps, machinery and steel casing material conventionally, need consuming time month or longer time, and further increase temporary works cost, require to disagree with progress and the cost control of projects construction.
Summary of the invention
For the use steel casing follow-up spreading construction technology existing in prior art, engineering construction progress is seriously lagged behind, and cost is high, the defect that benefit is low, the invention provides a kind of without reorganizing the construction of steel casing secondary, the construction technology that cost is low and simple and practical.
The present invention is achieved by the following technical solution: it adopts following steps:
(1) clay backfilling is carried out in spillage stake hole, and with Churn drill shock compaction to the above 1-2 rice of steel casing end opening;
(2), according to the discrepancy in elevation of riverbed and the steel casing periphery soil body, to steel casing throwing slabstone or sand pocket around, after throwing, absolute altitude is higher than periphery soil body absolute altitude;
(3) in steel casing, add cement and clay, clay in steel casing and cement grout are uniformly mixed with Churn drill tup, and creep at a slow speed to the following 3-4 rice of steel casing end opening, use down again and pull the method mediation clay of Churn drill tup and the mixed serum of cement, make mixed serum infiltrate 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 by drilling construction make it fully to infiltrate into steel casing end opening place spillage, ooze in the gap between the soil layer particle of slurry, the fixed soil consolidation rear and spillage place of mixing mud is integrated, and reaches the object of preventing spillage, oozing slurry.After mixing mud is fixed, can continue to creep into operation until complete a hole.In pile foundation construction, according within the scope of practical experience steel casing end opening 3-4 rice being easily loosening position of soil layer.
Mixed serum for the ease of clay and cement fully infiltrates spillage, oozes slurry place, and the cement adding in 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 object, in step (3), should control mud balance is 1.34-1.45, and preferably mud balance is 1.4.By controlling mud balance, make the hydraulic pressure in steel casing be greater than outside hydraulic pressure, so that mixed serum fully infiltrates spillage, oozes slurry place.
The invention has the beneficial effects as follows: construction method of the present invention is simple, do not need to reorganize the construction of steel casing secondary, the engineering time is short, and construction cost is low, effectively accelerating construction progress and reduction temporary works cost.
Accompanying drawing explanation
Fig. 1 is the construction schematic diagram of the specific embodiment of the invention;
In figure: 1, steel casing, 2, riverbed, 3, soil layer, 4, mixed serum, 5, slabstone or sand pocket heap buildup.
The specific embodiment
Below by non-limiting embodiment, also the present invention is further illustrated by reference to the accompanying drawings:
As shown in drawings, when steel casing 1 end opening occurs spillage, oozes when slurry, first clay backfilling is carried out in this spillage stake hole, clay backfilling to the above 2-3 rice of steel casing 1 end opening is advisable, and use drill hammer shock compaction to the above 1-2 rice of steel casing 1 end opening, so that temporarily fix the steel casing 1 end opening position soil layer 3 that easily collapses.
The discrepancy in elevation situation of riverbed 2 and the periphery soil body around measurement steel casing 1, as the obviously discrepancy in elevation of nothing, can use and add appropriate clay increasing mud balance, again the method for carrying out mud off processes that (consumption of clay is not so that mud hinders tup freely to rotate and be advisable, mud balance 1.5 left and right), or suitably around steel casing 1, carry out slabstone or sand pocket throwing, and around steel casing 1, form slabstone or sand pocket heap buildup 5, play stabilized steel and protect the effect of 1 surrounding soil.As large in the discrepancy in elevation of riverbed around 2 and the periphery soil body or certain is larger compared with other limit discrepancy in elevation on one side, need according to discrepancy in elevation situation, at problem stake periphery or the lower a large amount of throwing slabstones in one side or sand pocket, after throwing, absolute altitude, higher than periphery soil body absolute altitude, fully reaches the effect of stabilized steel casing 1 surrounding soil.The time of throwing slabstone or sand pocket, when should being chosen in slack tide, can make filling can fill up more accurately the position subsiding like this, and can utilize the entrained sand of fluctuation tide tidewater to fill up the space between slabstone or sand pocket.
While being chosen in lowest water level, in the steel casing 1 completing, add appropriate cement and clay in backfill, the mud of cement amount take match ratio as 55kg/m3 is advisable, and the ratio of clay amount and mud amount is advisable with volume ratio at 1: 10.Utilize Churn drill tup that the clay in steel casing 1 and cement grout are stirred, are in harmonious proportion and form mixed serum 4, and creep at a slow speed to down 3-4 rice of steel casing 1 end opening.Re-use Churn drill tup and pull up and down and be in harmonious proportion mixed serum 4, be beneficial to mixed serum 4 and infiltrate spillage, ooze in the gap between the soil layer particle of slurry.Infiltrate into spillage place for the ease of mixed serum 4, in this process, will strictly control mud balance, general mud balance is controlled at 1.35-1.45 and is advisable, and preferably mud balance is 1.4.In the present invention, while being chosen in low tide, constructing, is because mud pressure in steel casing is now higher than cylinder external water pressure, is convenient to, in the gap between soil layer particle that cement grout infiltrates into spillage place, also can play the function of retaining wall.After completing, leave standstill more than 48 hours, be convenient to the fixed of mixed serum 4, after mixed serum 4 is fixed at spillage place with surrounding soil is fixed is integrated, the object of reach prevention spillage, oozing slurry.Now, then continue to creep into operation until complete a hole by the method for slow punching.
Other parts of the present invention adopt prior art, do not repeat them here.
Claims (2)
1. a method of processing water pile foundation perforation spillage under tidal effect while adopting 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 Churn drill shock compaction to the above 1-2 rice of steel casing end opening;
(2), according to the discrepancy in elevation of riverbed and the steel casing periphery soil body, in slack tide, to steel casing throwing slabstone or sand pocket around, after throwing, absolute altitude is higher than periphery soil body absolute altitude;
(3) in the time of lowest water level, in steel casing, add cement and clay, clay in steel casing and cement grout are uniformly mixed with Churn drill tup, and creep at a slow speed to the following 3-4 rice of steel casing end opening, use down again and pull the method mediation clay of Churn drill tup and the mixed serum of cement, make mixed serum infiltrate spillage place;
(4) leave standstill drilling and forming hole again after mixed serum is fixed;
The cement adding in step (3) is that match ratio is 55Kg/m
3mud, the volume ratio of clay amount and mud amount is 1:10;
In step (3), controlling mud balance is 1.35-1.45.
2. the method for processing water pile foundation perforation spillage under tidal effect while adopting steel casing to carry out pile foundation construction according to claim 1, is characterized in that: in step (3), controlling mud balance is 1.4.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN102535457A CN102535457A (en) | 2012-07-04 |
| CN102535457B true 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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Families Citing this family (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 |
| 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 |
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 |
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2012
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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 (4)
| 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》.2005,第18卷32、33、39. |
| 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》.2010,第36卷(第16期),70-71页. |
| 海上钻孔桩施工漏浆问题预防及处理措施;侯凤彪;《石家庄铁道学院学报》;20050630;第18卷;32、33、39 * |
| 钻孔灌注桩漏浆原因分析及处理措施探讨;江永安等;《山西建筑》;20100630;第36卷(第16期);70-71页 * |
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