CN114293907A - Pile foundation pore-forming construction method under boulder water-out stratum condition - Google Patents
Pile foundation pore-forming construction method under boulder water-out stratum condition Download PDFInfo
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- CN114293907A CN114293907A CN202111637285.6A CN202111637285A CN114293907A CN 114293907 A CN114293907 A CN 114293907A CN 202111637285 A CN202111637285 A CN 202111637285A CN 114293907 A CN114293907 A CN 114293907A
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Abstract
A pile foundation pore-forming construction method under the condition of boulder water-yielding stratum comprises the following steps: a. selecting a rotary drilling rig with proper power according to the pile diameter and the pile length of the bridge; b. taking slag to form a hole at the position of the pile foundation by a rotary drilling rig according to the depth of 4-6 meters; c. constructing backfilling concrete according to the underwater concrete construction process, wherein the grade of the backfilling concrete is the same as that of the pile core concrete; d. curing the backfilled concrete, and coring the backfilled concrete by using a rotary drilling rig when the strength of the concrete reaches 70%; e. and repeating the steps b-d, and circularly constructing to the designed hole bottom to finish pile foundation hole forming. The invention effectively solves the technical problems of deviated holes, shrinkage holes, chambering, hole collapse and improper placement of the reinforcement cage during the hole forming of the pile foundation, which influence the construction progress, the construction safety and the hole forming quality.
Description
Technical Field
The invention belongs to the technical field of drilling construction of constructional engineering, in particular to hole forming construction of a pile foundation under the condition of a boulder water-out stratum, and particularly relates to a pile foundation hole forming construction method under the condition of the boulder water-out stratum.
Background
In the construction of the highway bridge pile foundation pore-forming engineering, at present, the pore-forming is usually performed by adopting the construction methods of percussion drilling, rotary drilling, manual hole digging, steel casing adding, peripheral water-stop curtain adding manual hole digging and the like. In the boulder effluent stratum, drill jamming and continuous backfill of slab stone hole alignment are caused due to hole forming by impact drilling, the required construction time is long, and the construction period is not allowed; the direct hole forming by adopting the rotary drilling rig can cause a large amount of hole collapse and hole expansion phenomena, and the hole cannot be formed to the bottom of the hole; holes can not be formed due to the high strength of the boulder in the way of hole forming by adopting the rotary drill; the manual hole digging cannot ensure construction and safety because the water outlet stratum of the boulder cannot be drained of underground water; the steel sleeve can reduce the friction force of the pile foundation and has hidden danger on the bearing capacity of the pile foundation; and drilling and grouting can not be completed in the peripheral waterproof curtain construction process due to the fact that the boulder is blocked in the drilling process of the drilling machine.
Disclosure of Invention
The invention aims to provide a construction method for forming a hole of a bridge pile foundation under the condition of a boulder drift water-out stratum, which effectively solves the technical problems that the construction progress, the construction safety and the hole forming quality are influenced because the deviated hole, the shrinkage hole, the reaming hole, the collapse hole and the steel reinforcement cage are not placed in place when the pile foundation is formed the hole.
The invention is realized by the following technical scheme.
A pile foundation pore-forming construction method under the condition of boulder water-yielding stratum comprises the following steps:
a. selecting a rotary drilling rig with proper power according to the pile diameter and the pile length of the bridge;
b. taking slag to form a hole at the position of the pile foundation by a rotary drilling rig according to the depth of 4-6 meters;
c. constructing backfilling concrete according to the underwater concrete construction process, wherein the grade of the backfilling concrete is the same as that of the pile core concrete;
d. curing the backfilled concrete, and coring the backfilled concrete by using a rotary drilling rig when the strength of the concrete reaches 70%;
e. and repeating the steps b-d, and circularly constructing to the designed hole bottom to finish pile foundation hole forming.
The invention has safe construction and can obviously improve the construction speed; the method is particularly suitable for hole forming construction of the pile foundation under the condition of the boulder water-out stratum, and can guarantee the construction period of the pile foundation particularly in a highway controlled bridge, so that the construction period of the whole bridge is guaranteed.
Drawings
FIG. 1 is a drawing illustrating the construction steps of the present invention.
Detailed Description
The present invention will be described in further detail by way of examples. The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
As shown in fig. 1, a pile foundation pore-forming construction method under the boulder water-out stratum condition comprises the following steps:
a. selecting a rotary drilling rig with proper power according to the pile diameter and the pile length of the bridge;
b. taking slag to form a hole at the position of the pile foundation by a rotary drilling rig according to the depth of 4-6 meters;
c. constructing backfilling concrete according to the underwater concrete construction process, wherein the grade of the backfilling concrete is the same as that of the pile core concrete;
d. curing the backfilled concrete, and coring the backfilled concrete by using a rotary drilling rig when the strength of the concrete reaches 70%;
e. and repeating the steps b-d, and circularly constructing to the designed hole bottom to finish pile foundation hole forming.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (1)
1. A pile foundation pore-forming construction method under the boulder water-out stratum condition is characterized by comprising the following steps:
a. selecting a rotary drilling rig with proper power according to the pile diameter and the pile length of the bridge;
b. taking slag to form a hole at the position of the pile foundation by a rotary drilling rig according to the depth of 4-6 meters;
c. constructing backfilling concrete according to the underwater concrete construction process, wherein the grade of the backfilling concrete is the same as that of the pile core concrete;
d. curing the backfilled concrete, and coring the backfilled concrete by using a rotary drilling rig when the strength of the concrete reaches 70%;
e. and repeating the steps b-d, and circularly constructing to the designed hole bottom to finish pile foundation hole forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111637285.6A CN114293907A (en) | 2021-12-29 | 2021-12-29 | Pile foundation pore-forming construction method under boulder water-out stratum condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111637285.6A CN114293907A (en) | 2021-12-29 | 2021-12-29 | Pile foundation pore-forming construction method under boulder water-out stratum condition |
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| CN114293907A true CN114293907A (en) | 2022-04-08 |
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| CN202111637285.6A Pending CN114293907A (en) | 2021-12-29 | 2021-12-29 | Pile foundation pore-forming construction method under boulder water-out stratum condition |
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| CN110805029A (en) * | 2019-11-12 | 2020-02-18 | 北京石油化工学院 | Subway underground-excavated station drilling and grouting fender post construction method |
| CN112392400A (en) * | 2020-10-28 | 2021-02-23 | 北京住总第一开发建设有限公司 | Hole forming construction process for slope protection pile in complex geological environment |
| CN112459050A (en) * | 2020-11-12 | 2021-03-09 | 中交一公局集团有限公司 | Hard cutting pile-forming construction method for secant pile in high-water-level complex geological area |
| CN113738272A (en) * | 2021-11-08 | 2021-12-03 | 中建八局发展建设有限公司 | Rotary drilling hole forming construction method for pile foundation in gravel area with easy hole collapse |
| US20220412034A1 (en) * | 2019-11-29 | 2022-12-29 | Jammy Life Gmbh | Method and apparatus for layer-by-layer filling and compacting cohesive building materials in layers in boreholes |
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2021
- 2021-12-29 CN CN202111637285.6A patent/CN114293907A/en active Pending
Patent Citations (12)
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| CN102758430A (en) * | 2012-07-31 | 2012-10-31 | 中建五局第三建设有限公司 | Large-diameter rotary digging pile construction technology for ultra-deep dumped unconsolidated soil bodies |
| CN105714772A (en) * | 2016-02-22 | 2016-06-29 | 北龙建设集团有限公司 | Re-drilling concrete wall protecting method for hole formation of rock-socketed pile in karst region |
| CN109653196A (en) * | 2018-11-23 | 2019-04-19 | 中国五冶集团有限公司 | A kind of depth mound backfill reaming casing method |
| CN110230309A (en) * | 2019-01-24 | 2019-09-13 | 中建新疆建工土木工程有限公司 | Karst region bridge solution cavity pile base construction method |
| CN109915021A (en) * | 2019-03-19 | 2019-06-21 | 安徽省公路桥梁工程有限公司 | A kind of aquatic pile foundation construction drill method |
| CN110185386A (en) * | 2019-06-27 | 2019-08-30 | 四川公路桥梁建设集团有限公司 | A kind of incompact-deposit bodies stratum concrete guard wall rotary digging fast pore-creating method |
| CN110735600A (en) * | 2019-09-30 | 2020-01-31 | 广州天力建筑工程有限公司 | mechanical hole-forming pile construction process for karst geology |
| CN110805029A (en) * | 2019-11-12 | 2020-02-18 | 北京石油化工学院 | Subway underground-excavated station drilling and grouting fender post construction method |
| US20220412034A1 (en) * | 2019-11-29 | 2022-12-29 | Jammy Life Gmbh | Method and apparatus for layer-by-layer filling and compacting cohesive building materials in layers in boreholes |
| CN112392400A (en) * | 2020-10-28 | 2021-02-23 | 北京住总第一开发建设有限公司 | Hole forming construction process for slope protection pile in complex geological environment |
| CN112459050A (en) * | 2020-11-12 | 2021-03-09 | 中交一公局集团有限公司 | Hard cutting pile-forming construction method for secant pile in high-water-level complex geological area |
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