CN101532292A - Construction process for jet grouting anchor rod - Google Patents
Construction process for jet grouting anchor rod Download PDFInfo
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- CN101532292A CN101532292A CN 200810034670 CN200810034670A CN101532292A CN 101532292 A CN101532292 A CN 101532292A CN 200810034670 CN200810034670 CN 200810034670 CN 200810034670 A CN200810034670 A CN 200810034670A CN 101532292 A CN101532292 A CN 101532292A
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- rod
- whitewashing
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- promotes
- churning
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Abstract
The invention relates to a construction process for jet grouting anchor rod, which comprises the following detailed steps of: 1. setting out according to design requirements; 2. positioning a drilling machine; 3. drilling; 4. guniting; 5. lifting by jet grouting; 6. drilling for a second time; 7. guniting for a second time; 8. lifting by jet grouting for a second time; 9. installing and embedding a rod body; and 10. pouring and capping. The construction process can overcome the technical problem that the anchoring effect of slip-casting type or mechanical type anchoring is poor, and breaks through the tradition, and the test demonstrates that the anchoring effect is better than that of slip-casting anchoring.
Description
Technical field
The present invention relates to a kind of in engineering constructions such as side slope, tunnel, underground construction, mine the ground anchorage job practices.
Background technology
At present, the ground anchorage technology is used widely in engineering constructions such as side slope, tunnel, underground construction, mine, is the effective ways that improve geotechnical engineering stability and solve complicated geotechnical engineering stable problem.Usually rock soil anchor employing slip casting type or mechanical type are two types.Its ground anchorage weak effect.Therefore, need open up thinking, break traditions, exploitation one cover construction process for jet grouting anchor rod, through experimental examination, anchoring effect is good slightly than grouted rock bolt.
The scope of application:
Jet grouting anchor rod is as slope reinforcement and the outer a kind of new technical measures of supporting of excavation of foundation pit, and effect is remarkable, is different from slip casting type and mechanical type prestressed anchor, for geotechnical anchor engineering provides new method.
Summary of the invention
The present invention will provide a kind of construction process for jet grouting anchor rod, and this technology can solve the technical problem of slip casting type or two kinds of anchoring types of mechanical type anchoring effect difference.
For achieving the above object, technical scheme of the present invention is:
A kind of construction process for jet grouting anchor rod, its concrete steps are as follows:
1. carry out setting-out by construction drawing
2. rig is located
3. boring: rig is according to the boring of designed inclination angle degree, and the degree of depth is controlled at the following 20cm of projected depth, and drilling rod adopts double pipe;
4. whitewashing
Slurry configurations: cement adopts 32.5 grades of Portland cements, water/binder ratio 0.75～0.85.
Once whitewashing, grouting pressure generally is controlled at 22～25MPa, and every 150cm section grouting pressure is increased to 25～30MPa, air pressure 0.6～0.8MPa.
5. churning promotes
Reach the schematic design required pressure normal after, the beginning churning promotes, every 150cm promotes and was controlled at 22 rev/mins of rotating speeds 20cm/ minute.Every meter 500kg of cement mixing content, rotary churning pile footpath 80cm, local 100cm.Whitewashing length stops whitewashing after reaching the design anchorage length.
6. secondary drilling: secondary drilling is at the bottom of the hole;
7. secondary whitewashing: every meter 200kg of secondary whitewashing cement mixing content;
8. the secondary churning promotes: churning promotes drilling rod and all releases boring, and rig is displaced to next hole;
9. the body of rod is assembled and is buried underground
Anchor rod body adopts φ 50 finish rolling deformed bars, and the joint of reinforcing bar adopts the screw-thread steel sleeve; When burying the body of rod underground along body of rod axis direction installation bracket; The free section of the body of rod ties with galvanized wire with the anchor bar body junction with the Polypropylence Sheet parcel, and fracture seals with electrician's infantees, prevents that cement grout from flowing into;
10. cast is beared down on one
The invention has the beneficial effects as follows: this technology can solve the technical problem of slip casting type or two kinds of anchoring types of mechanical type anchoring effect difference, and has broken tradition, and through experimental examination, anchoring effect is good than grouted rock bolt.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Construction process for jet grouting anchor rod of the present invention: may further comprise the steps:
1. by the designing requirement setting-out
2. rig is located
3. boring
4. whitewashing
5. churning promotes
6. secondary drilling
7. secondary whitewashing
8. the secondary churning promotes
9. the body of rod is assembled and is buried underground
10. cast is beared down on one
Jet grouting anchor rod construction concrete grammar of the present invention is:
At first press construction drawing setting-out location, special drilling machine is holed according to the designed inclination angle degree, and drilling depth is controlled at the following 20cm of projected depth, and drilling rod adopts double pipe.
Slurry configurations: cement adopts 32.5 grades of Portland cements, water/binder ratio 0.75～0.85.
Once whitewashing, grouting pressure generally is controlled at 22～25MPa.Every 150cm section grouting pressure is increased to 25～30MPa, air pressure 0.6～0.8MPa.Reach the schematic design required pressure normal after, the beginning churning promotes, every 150cm promotes and was controlled at 22 rev/mins of rotating speeds 20cm/ minute.Every meter 500kg of cement mixing content, rotary churning pile footpath 80cm, local 100cm.Whitewashing length stops whitewashing after reaching the design anchorage length.
Secondary drilling at the bottom of the hole, every meter 200kg of secondary whitewashing cement mixing content, churning promotes drilling rod and all releases boring, rig is displaced to next hole.
The assembling of the body of rod and burying underground: anchor rod body adopts φ 50 finish rolling deformed bars (rank 735/935).The anchor pole reinforcing bar should be straight, oil removing and rust cleaning.The joint of reinforcing bar adopts the screw-thread steel sleeve.Along body of rod axis direction installation bracket, when preventing to lay the body of rod, the body of rod is turned round pressure, bending when burying the body of rod underground.The free section of the body of rod ties with galvanized wire with the anchor bar body junction with the Polypropylence Sheet parcel, and fracture seals with electrician's infantees, prevents that cement grout from flowing into.
This jet grouting anchor rod is used first by No. three lines of the emerging shipbuilding of the Yu Zhong captain of Foundation Engineering Co. of Shanghai City base first phase, and through basic tensile test and creep test, anchoring effect is good, has promotional value.
Claims (1)
1. construction process for jet grouting anchor rod is characterized in that concrete steps are as follows:
(1) carries out setting-out by construction drawing
(2) rig location
(3) boring: rig is according to the boring of designed inclination angle degree, and the degree of depth is controlled at the following 20cm of projected depth, and drilling rod adopts double pipe;
(4) whitewashing
Slurry configurations: cement adopts 32.5 grades of Portland cements, water/binder ratio 0.75～0.85;
Once whitewashing, grouting pressure generally is controlled at 22～25MPa; Every 150cm section grouting pressure is increased to 25～30MPa, air pressure 0.6～0.8MPa;
(5) churning promotes
Reach the schematic design required pressure normal after, the beginning churning promotes, every 150cm promotes and was controlled at 22 rev/mins of rotating speeds 20cm/ minute; Every meter 500kg of cement mixing content, rotary churning pile footpath 80cm, local 100cm; Whitewashing length stops whitewashing after reaching the design anchorage length;
(6) secondary drilling: secondary drilling is at the bottom of the hole;
(7) secondary whitewashing: every meter 200kg of secondary whitewashing cement mixing content;
(8) the secondary churning promotes: churning promotes drilling rod and all releases boring, and rig is displaced to next hole;
(9) body of rod is assembled and is buried underground
Anchor rod body adopts φ 50 finish rolling deformed bars, and the joint of reinforcing bar adopts the screw-thread steel sleeve; When burying the body of rod underground along body of rod axis direction installation bracket; The free section of the body of rod ties with galvanized wire with the anchor bar body junction with the Polypropylence Sheet parcel, and fracture seals with electrician's infantees, prevents that cement grout from flowing into;
(10) cast is beared down on one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810034670XA CN101532292B (en) | 2008-03-14 | 2008-03-14 | Construction process for jet grouting anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810034670XA CN101532292B (en) | 2008-03-14 | 2008-03-14 | Construction process for jet grouting anchor rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101532292A true CN101532292A (en) | 2009-09-16 |
| CN101532292B CN101532292B (en) | 2011-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810034670XA Active CN101532292B (en) | 2008-03-14 | 2008-03-14 | Construction process for jet grouting anchor rod |
Country Status (1)
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182196A (en) * | 2011-03-28 | 2011-09-14 | 北京鑫实路桥建设有限公司 | Reverse circulation grouting anchor rod reinforcing method for road rock side slope |
| CN103088819A (en) * | 2013-02-22 | 2013-05-08 | 北京市公路桥梁建设集团有限公司 | Pre-stressed anchor cable construction method |
| CN105178328A (en) * | 2015-07-30 | 2015-12-23 | 葛加君 | High-pressure jet grouting expansion hot-melting anchor bolt foundation pit supporting method |
| CN106120808A (en) * | 2016-07-28 | 2016-11-16 | 上海宝冶集团有限公司 | A kind of in the soft comprehensive support method moulded in clay foundation ditch |
| CN109208592A (en) * | 2018-10-19 | 2019-01-15 | 中国黄金集团建设有限公司 | A kind of anchor rod construction method |
| CN111395332A (en) * | 2020-03-30 | 2020-07-10 | 胡美玲 | Rotary excavating and anchor cable construction method for hard rock stratum |
| CN113173766A (en) * | 2021-03-23 | 2021-07-27 | 远强地基工程(天津)股份有限公司 | Soil body curing agent and jet grouting anchor pile construction process applying same |
| CN113309374A (en) * | 2021-05-25 | 2021-08-27 | 中国一冶集团有限公司 | Device and method for quickly recovering slurry of assembled wall component |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5575593A (en) * | 1994-07-11 | 1996-11-19 | Atlas Systems, Inc. | Method and apparatus for installing a helical pier with pressurized grouting |
| CN1110754A (en) * | 1994-08-08 | 1995-10-25 | 何庆林 | Large-head anchor rod construction method and special drilling machine |
| CN1204713A (en) * | 1998-07-24 | 1999-01-13 | 黄运飞 | Multifunction stirring rotation spray roofbolt rig and construction method |
| CN1657711A (en) * | 2005-03-21 | 2005-08-24 | 严平 | Rotary spray anchoring pile construction process |
| KR100729661B1 (en) * | 2005-09-23 | 2007-06-18 | 주식회사 에스에스씨컨설턴트 | Construction method for soil improvement anchor system |
| JP3954628B2 (en) * | 2006-01-16 | 2007-08-08 | 新技術工営株式会社 | Underground anchor placement method |
-
2008
- 2008-03-14 CN CN200810034670XA patent/CN101532292B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182196A (en) * | 2011-03-28 | 2011-09-14 | 北京鑫实路桥建设有限公司 | Reverse circulation grouting anchor rod reinforcing method for road rock side slope |
| CN103088819A (en) * | 2013-02-22 | 2013-05-08 | 北京市公路桥梁建设集团有限公司 | Pre-stressed anchor cable construction method |
| CN105178328A (en) * | 2015-07-30 | 2015-12-23 | 葛加君 | High-pressure jet grouting expansion hot-melting anchor bolt foundation pit supporting method |
| CN106120808A (en) * | 2016-07-28 | 2016-11-16 | 上海宝冶集团有限公司 | A kind of in the soft comprehensive support method moulded in clay foundation ditch |
| CN109208592A (en) * | 2018-10-19 | 2019-01-15 | 中国黄金集团建设有限公司 | A kind of anchor rod construction method |
| CN111395332A (en) * | 2020-03-30 | 2020-07-10 | 胡美玲 | Rotary excavating and anchor cable construction method for hard rock stratum |
| CN113173766A (en) * | 2021-03-23 | 2021-07-27 | 远强地基工程(天津)股份有限公司 | Soil body curing agent and jet grouting anchor pile construction process applying same |
| CN113309374A (en) * | 2021-05-25 | 2021-08-27 | 中国一冶集团有限公司 | Device and method for quickly recovering slurry of assembled wall component |
| CN113309374B (en) * | 2021-05-25 | 2023-07-18 | 中国一冶集团有限公司 | Rapid slurry recycling device and method for assembled wall components |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101532292B (en) | 2011-07-13 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Owner name: SHANGHAI JIANHAO ENGINEERING CONSULTANCY CO., LTD. Effective date: 20130522 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Yaoliang Inventor after: Zhao Weicheng Inventor after: Yuan Fen Inventor after: Li Haiguang Inventor before: Li Yaoliang Inventor before: Zhao Weicheng Inventor before: Yuan Fen Inventor before: Zhang Xiaofeng |
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Free format text: CORRECT: INVENTOR; FROM: LI YAOLIANG ZHAO WEICHENG YUAN FEN ZHANG XIAOFENG TO: LI YAOLIANG ZHAO WEICHENG YUAN FEN LI HAIGUANG |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130522 Address after: 200433 Yangpu District, Shanghai Star Road, No. 231 Patentee after: Shanghai Foundation Engineering Co., Ltd. Patentee after: Shanghai Jianhao Engineering Consultancy Co., Ltd. Address before: 200433 Yangpu District, Shanghai Star Road, No. 231 Patentee before: Shanghai Foundation Engineering Co., Ltd. |
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| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI FOUNDATION ENGINEERING GROUP CO., LTD. Free format text: FORMER NAME: SHANGHAI FOUNDATION ENGINEERING CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 200433, Shanghai, Yangpu District Star Road No. 231 Patentee after: Shanghai Foundation Engineering Group Co., Ltd. Patentee after: Shanghai Jianhao Engineering Consultancy Co., Ltd. Address before: 200433 Yangpu District, Shanghai Star Road, No. 231 Patentee before: Shanghai Foundation Engineering Co., Ltd. Patentee before: Shanghai Jianhao Engineering Consultancy Co., Ltd. |