CN104863126A - Collapse hole treatment method of large-diameter bored pile using pressure grouting technology - Google Patents
Collapse hole treatment method of large-diameter bored pile using pressure grouting technology Download PDFInfo
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- CN104863126A CN104863126A CN201510318302.8A CN201510318302A CN104863126A CN 104863126 A CN104863126 A CN 104863126A CN 201510318302 A CN201510318302 A CN 201510318302A CN 104863126 A CN104863126 A CN 104863126A
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- collapse hole
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- madjack pipe
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Abstract
The invention discloses a collapse hole treatment method of a large-diameter bored pile using a pressure grouting technology. The method comprises the following steps: firstly binding concentric inner ring mortar intrusion pipe (5) and outer ring mortar intrusion pipe (6) in a reinforcement cage (9) prepared to be hung in a bored pile (1), wherein the lower ends of the inner ring mortar intrusion pipe and the outer ring mortar intrusion pipe both extend the reinforcement cage for 5-10 cm, and the top ends both exceed the top surface of a bearing table (3) which is subsequently prepared to be cast on the top of the bored pile for 0.5-1.0 m; immediately cleaning the hole after a collapse hole occurs of the bored pile; then hanging the reinforcement cage in the hole, pouring concrete into the hole, and casting the bearing table after the quality of the pile body of a to-be-poured pile is stable; finally grouting to the position of the collapse hole through the inner ring mortar intrusion pipe and the outer ring mortar intrusion pipe by using a high-pressure rotary jet grouting construction method to form a pressure grouting concretion body (2) to constitute a composite pile foundation with the bored pile on the upper part so as to bear the upper load. According to the method, the problem of collapse hole of the large-diameter bored pile in a bridge pier foundation can be effectively solved, the requirement on bearing force of the pile foundation can be met, and the construction is easy, convenient and fast.
Description
Technical field
The present invention relates to building pile foundation engineering technical field.
Background technology
Bored pile because its speed of application is fast, it is little to take up an area, simultaneously to the strong adaptability of various soil layer, without soil compaction effect, without earthquake, without hot-tempered sound, bearing capacity advantages of higher, be used widely in pile foundation of bridge pier engineering.And the bored pile general diameter of pile foundation of bridge pier engineering is comparatively large, in the poor area of geological conditions or due to reasons such as constructing operation are improper, be easy in drilling construction process, occur large-scale collapse hole, bury drills phenomenon.For this, process according to adding a scheme, not only long in time limit, cost is high, and at pile foundation of bridge pier engineering many employings multi-column pier foundation, does not add the execution conditions of stake, and riverbed subsides the reasons such as pile rate is low in addition, and the method is also inapplicable.
Summary of the invention
The object of the invention is to the bored pile collapse hole problem overcome in bridge pier foundation in construction duration process, a kind of bored pile collapse hole problem that can effectively solve in pile foundation of bridge pier plinth is provided, ensures the large diameter bored pile collapse hole processing method of the employing Grouting Technology of bearing capacity of pile foundation and stability.
Object of the present invention is achieved through the following technical solutions:
Adopt the method for Grouting Technology process large diameter bored pile collapse hole, method step is as follows:
A. inner ring madjack pipe and outer ring madjack pipe that in the reinforcing cage in castinplace pile, colligation is concentric is hung onto in advance in preparation; The lower end of inner ring madjack pipe and outer ring madjack pipe all exceeds reinforcing cage 5 ~ 10cm, and top all exceeds end face 0.5 ~ 1.0m that the cushion cap in castinplace pile top is built in follow-up preparation;
B. concreting castinplace pile in the casing of pile foundation, carries out hole clearly with drilling rod and drill bit after castinplace pile generation collapse hole immediately;
C., after clear hole, reinforcing cage is hung onto in hole in the lump together with the inner ring madjack pipe tied up and outer ring madjack pipe;
D. to concrete perfusion in hole, after concrete solidifies gradually and grout pile weight tends towards stability, at castinplace pile top concreting cushion cap;
E. after bearing platform construction, adopt high-pressure rotary-spray construction method by inner ring madjack pipe and outer ring madjack pipe slip casting to collapse hole position, carry out the churning consolidation construction of collapse hole position, formation consolidation grouting body, jointly form composite pile foundation with the bored pile on top, bear upper load.
Inner ring madjack pipe of the present invention and outer ring madjack pipe joint separately all adopt screwed connection, and two ends adopt plug to obturage respectively.The construction of described churning consolidation adopts cement-silicate slurries or single cement paste or Cement fly ash or cement-bentonite grout as press mortar, adopt and determine spray mode in high pressure jet grouting, slurries are pressed into collapse hole position, slurries penetrate the collapse hole soil body and together with soil solidifying, form consolidation grouting body.Described cement-silicate slurries are the combined casting material mixing water glass in cement grout, and wherein, the water/binder ratio of cement grout is 0.75:1 ~ 1:1, and water glass incorporation is 2% ~ 4% of cement grout quality.
The invention has the beneficial effects as follows:
(1) adopt the churning consolidation construction that Grouting Technology carries out collapse hole position, churning consolidation Scheme of Strengthening easy construction is quick, and the duration is short, and cost is low.
(2) consolidation grouting physical efficiency and pile soil horizon have good combination, produce larger frictional force, and overlap with epimere bored pile and form composite pile foundation, shared upper load, ensure bearing capacity of pile foundation and bridge pier stability.
The present invention effectively can solve the large diameter bored pile collapse hole problem in pier footing, Pile Bearing Capacity requirement can be met, and there is easy construction advantage efficiently, avoid and adopt the long in time limit and riverbed faced when adding scheme to subside the low difficult problem of pile rate, compare and conventional add a scheme, applicability is stronger, has more superiority.
Accompanying drawing explanation
Fig. 1 is pier footing bored pile collapse hole schematic diagram;
Fig. 2 is for adopting the inventive method process bored pile collapse hole schematic diagram;
Fig. 3 is that spiral jetting grout consolidation process madjack pipe is buried underground and churning induration schematic diagram.
In figure, each label is: 1---bored pile; 2---consolidation grouting body; 3---cushion cap; 4---casing; 5---inner ring madjack pipe; 6---outer ring madjack pipe; 7---drilling rod; 8---drill bit; 9---reinforcing cage; A---riverbed; B---collapse hole position.
Detailed description of the invention
Below by drawings and Examples, the present invention is described in further detail, but protection scope of the present invention is not limited to described content.
Adopt the method for Grouting Technology process large diameter bored pile collapse hole, see Fig. 1, Fig. 2, Fig. 3, method step is as follows:
A. inner ring madjack pipe 5 and outer ring madjack pipe 6 that in the reinforcing cage 9 in castinplace pile 1, colligation is concentric is hung onto in advance in preparation; The lower end of inner ring madjack pipe 5 and outer ring madjack pipe 6 all exceeds reinforcing cage 5 ~ 10cm, and top all exceeds end face 0.5 ~ 1.0m that the cushion cap 3 in castinplace pile top is built in follow-up preparation; Inner ring madjack pipe 5 and the respective joint of outer ring madjack pipe 6 all adopt screwed connection, and two ends adopt plug to obturage respectively;
B. concreting castinplace pile 1 in the casing 4 of the pile foundation position that riverbed A determines, after there is the collapse hole as shown in collapse hole position B in Fig. 1 in castinplace pile, according to place exploration report and designing requirement, determine concrete collapse hole position (degree of depth and absolute altitude etc.) and stratum, place, carry out hole clearly with drilling rod 7 and drill bit 8 immediately; The all available art methods of concreting castinplace pile and clear hole;
C., after clear hole, reinforcing cage is hung onto in hole in the lump together with the inner ring madjack pipe 5 tied up and outer ring madjack pipe 6;
D. to concrete perfusion in hole, after concrete solidifies gradually and grout pile weight tends towards stability, at castinplace pile top concreting cushion cap 3;
E. after cushion cap 3 is constructed, adopt high-pressure rotary-spray construction method by inner ring madjack pipe 5 and outer ring madjack pipe 6 slip casting to collapse hole position, carry out the churning consolidation construction of collapse hole position, formation consolidation grouting body 2, jointly form composite pile foundation with the bored pile 1 on top, bear upper load.The construction of churning consolidation adopts cement-silicate slurries or single cement paste or Cement fly ash or cement-bentonite grout as press mortar, employing is determined spray and is penetrated supplementary consolidation style construction formation consolidation grouting body 2, namely use and determine spray mode in high pressure jet grouting, slurries are pressed into collapse hole position, slurries penetrate the collapse hole soil body and together with soil solidifying, form consolidation grouting body.Described cement-silicate slurries are the combined casting material mixing water glass in cement grout, and wherein, the water/binder ratio of cement grout is 0.75:1 ~ 1:1, and water glass incorporation is 2% ~ 4% of cement grout quality.High-pressure rotary-spray construction can adopt art methods.
Claims (4)
1. adopt the method for Grouting Technology process large diameter bored pile collapse hole, it is characterized in that, method step is as follows:
A. inner ring madjack pipe (5) and outer ring madjack pipe (6) that in the reinforcing cage (9) in castinplace pile (1), colligation is concentric is hung onto in advance in preparation; The lower end of inner ring madjack pipe (5) and outer ring madjack pipe (6) all exceeds reinforcing cage 5 ~ 10cm, and top all exceeds end face 0.5 ~ 1.0m that the cushion cap (3) in castinplace pile top is built in follow-up preparation;
B. concreting castinplace pile (1) in the casing (4) of pile foundation, uses drilling rod (7) and drill bit (8) to carry out hole clearly immediately after castinplace pile generation collapse hole;
C., after clear hole, reinforcing cage is hung onto in hole in the lump together with the inner ring madjack pipe (5) tied up and outer ring madjack pipe (6);
D. to concrete perfusion in hole, after concrete solidifies gradually and grout pile weight tends towards stability, at castinplace pile top with concreting cushion cap (3);
E. after cushion cap (3) construction, high-pressure rotary-spray construction method is adopted to pass through inner ring madjack pipe (5) and outer ring madjack pipe (6) slip casting to collapse hole position, carry out the churning consolidation construction of collapse hole position, form consolidation grouting body (2), jointly form composite pile foundation with the bored pile (1) on top, bear upper load.
2. the method for employing Grouting Technology process large diameter bored pile collapse hole according to claim 1, is characterized in that, described inner ring madjack pipe (5) and the respective joint of outer ring madjack pipe (6) all adopt screwed connection, and two ends adopt plug to obturage respectively.
3. the large diameter bored pile collapse hole processing method of employing Grouting Technology according to claim 1 and 2, it is characterized in that, the construction of described churning consolidation adopts cement-silicate slurries or single cement paste or Cement fly ash or cement-bentonite grout as press mortar, adopt and determine spray mode in high pressure jet grouting, slurries are pressed into collapse hole position, slurries penetrate the collapse hole soil body and together with soil solidifying, form consolidation grouting body (2).
4. the large diameter bored pile collapse hole processing method of employing Grouting Technology according to claim 3, it is characterized in that, described cement-silicate slurries are the combined casting material mixing water glass in cement grout, wherein, the water/binder ratio of cement grout is 0.75:1 ~ 1:1, and water glass incorporation is 2% ~ 4% of cement grout quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510318302.8A CN104863126B (en) | 2015-06-11 | 2015-06-11 | Use the method that Grouting Technology processes large diameter bored pile collapse hole |
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| CN201510318302.8A CN104863126B (en) | 2015-06-11 | 2015-06-11 | Use the method that Grouting Technology processes large diameter bored pile collapse hole |
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| CN104863126A true CN104863126A (en) | 2015-08-26 |
| CN104863126B CN104863126B (en) | 2016-08-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999198A (en) * | 2018-09-06 | 2018-12-14 | 蔡荪萍 | A kind of New-type mould bag soil nailing pile constructing process |
| CN114855783A (en) * | 2022-05-31 | 2022-08-05 | 中国建筑第八工程局有限公司 | Pile foundation construction device and method for hole collapse part of cast-in-situ bored pile |
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| US3720065A (en) * | 1971-07-06 | 1973-03-13 | J Sherard | Making holes in the ground and freezing the surrounding soil |
| CN101545256A (en) * | 2008-03-28 | 2009-09-30 | 中铁十三局集团第三工程有限公司 | Method for treating collapsed holes of bored piles by protective cylinder of steel reinforcement cage under geological conditions of silt stratification |
| CN102071645A (en) * | 2010-12-31 | 2011-05-25 | 中铁大桥局集团有限公司 | Bridge bored pile hole wall opening protection method |
| CN103510510A (en) * | 2013-10-22 | 2014-01-15 | 山东鸿顺集团有限公司 | Reinforced long spiral drilling concrete grouting pile and construction method thereof |
| CN103603340A (en) * | 2013-12-06 | 2014-02-26 | 中冶建工集团有限公司 | Rotary drilling and pile filling construction method capable of preventing hole collapse through flexible protection |
| CN102691296B (en) * | 2012-05-22 | 2015-02-11 | 广州市建筑科学研究院有限公司 | Pipe pile foundation for static-pressure grouting on pile side and rotary jet grouting at pile bottom and construction method thereof |
-
2015
- 2015-06-11 CN CN201510318302.8A patent/CN104863126B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3720065A (en) * | 1971-07-06 | 1973-03-13 | J Sherard | Making holes in the ground and freezing the surrounding soil |
| CN101545256A (en) * | 2008-03-28 | 2009-09-30 | 中铁十三局集团第三工程有限公司 | Method for treating collapsed holes of bored piles by protective cylinder of steel reinforcement cage under geological conditions of silt stratification |
| CN102071645A (en) * | 2010-12-31 | 2011-05-25 | 中铁大桥局集团有限公司 | Bridge bored pile hole wall opening protection method |
| CN102691296B (en) * | 2012-05-22 | 2015-02-11 | 广州市建筑科学研究院有限公司 | Pipe pile foundation for static-pressure grouting on pile side and rotary jet grouting at pile bottom and construction method thereof |
| CN103510510A (en) * | 2013-10-22 | 2014-01-15 | 山东鸿顺集团有限公司 | Reinforced long spiral drilling concrete grouting pile and construction method thereof |
| CN103603340A (en) * | 2013-12-06 | 2014-02-26 | 中冶建工集团有限公司 | Rotary drilling and pile filling construction method capable of preventing hole collapse through flexible protection |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999198A (en) * | 2018-09-06 | 2018-12-14 | 蔡荪萍 | A kind of New-type mould bag soil nailing pile constructing process |
| CN114855783A (en) * | 2022-05-31 | 2022-08-05 | 中国建筑第八工程局有限公司 | Pile foundation construction device and method for hole collapse part of cast-in-situ bored pile |
| CN114855783B (en) * | 2022-05-31 | 2023-10-13 | 中国建筑第八工程局有限公司 | Pile foundation construction device and construction method for hole collapse part of bored pile |
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| CN104863126B (en) | 2016-08-17 |
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Address after: 650501 Yunnan city of Kunming Province Economic and Technological Development Zone Forest Road No. 188 Co-patentee after: YUNNAN CONSTRUCTION ENGINEERING GROUP Co.,Ltd. Patentee after: YCIH FOUNDATION ENGINEERING CO.,LTD. Address before: 650501 Yunnan city of Kunming Province Economic and Technological Development Zone Forest Road No. 188 Co-patentee before: YUNNAN CONSTRUCTION ENGINEERING GROUP Co.,Ltd. Patentee before: YUNNAN CONSTRUCTION ENGINEERING FOUNDATION ENGINEERING CO.,LTD. |
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Effective date of registration: 20170525 Address after: Guandu information industry base in Yunnan province Kunming city forest road 650501 No. 188 construction development building Co-patentee after: Yunnan Construction Investment Holding Group Co., Ltd. Patentee after: YCIH FOUNDATION ENGINEERING CO.,LTD. Address before: 650501 Yunnan city of Kunming Province Economic and Technological Development Zone Forest Road No. 188 Co-patentee before: YUNNAN CONSTRUCTION ENGINEERING GROUP Co.,Ltd. Patentee before: YCIH FOUNDATION ENGINEERING CO.,LTD. |
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