CN102797256B - Anchor-rope construction method for passing through soft-soil layer - Google Patents
Anchor-rope construction method for passing through soft-soil layer Download PDFInfo
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- CN102797256B CN102797256B CN201210332444.6A CN201210332444A CN102797256B CN 102797256 B CN102797256 B CN 102797256B CN 201210332444 A CN201210332444 A CN 201210332444A CN 102797256 B CN102797256 B CN 102797256B
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Abstract
The invention discloses an anchor-rope construction method for passing through a soft-soil layer. The anchor-rope construction method comprises the following steps: (1) manufacturing of a steel sleeve; (2) hole opening from the outer side of a support structure to the soft soil layer according to the design requirement; (3) drilling of the steel sleeve; (4) continuous drilling to forming holes; (5) installation of an anchor rope; and (6) grouting and tensioning of the anchor rope, and anchor sealing. The anchor-rope construction method has the advantages that in the construction process, 100% anchor-hole forming rate can be guaranteed, the anchor-hole forming rate is greatly increased, the working efficiency is improved, the construction period is shortened, simultaneously, the consumption of a drill bit is reduced, the loss to a drilling machine is reduced and certain economic benefit is brought.
Description
Technical field
The present invention relates to a kind of construction method of anchor cable, relate in particular to a kind of anchor cable construction method of passing through Soft Soil Layer.
Background technology
Along with the development of China's economy and the acceleration of urbanization process, each metropolis starts to build underground engineering one after another.Utilize the underground space, the development underground space to promoting urban economy and Community health's development to there is important function.Deep foundation ditch is an important ingredient in underground construction, how in work progress, to guarantee foundation ditch safely, guarantee road and the building safety of foundation ditch periphery, be the problem that must consider and solve in construction.
Deep foundation ditch excavates in city, and there is traffic main artery around, built construction, pipe network etc., often adopt fender post+wide-angle prestress anchorage cable to carry out periphery supporting.Difficulty of construction is large, and safety factor requires high.At anchor cable, pass through weak soil section before and adopt auger machine pore-forming, what auger machine adopted is wet brill method pore-forming, at pore-forming, exits after drilling rod, often occurs the phenomenons such as collapse hole, off normal, causes anchor cable to install.After be adjusted into crawler type hidden hole drilling dry drill method pore-forming, when passing through weak soil section, because the anchor hole creeping into lacks supporting, often occur that bit freezing, drill bit the phenomenon such as cannot extract.Be that traditional anchor hole construction technique can well be crept in rock stratum, but the soil layer that can differ from for self-stability adopt traditional handicraft construction, can cause very large difficulty, even occurs useless hole phenomenon.In order to guarantee that engineering safety constructs fast, inventor sums up through constantly research, forms the construction method that the steel bushing combining structure of weak soil section is passed through in anchor cable boring.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, a kind of anchor cable construction method of passing through Soft Soil Layer is provided, solve anchor cable and passing through the problems such as the easy collapse hole of weak soil section, off normal, bit freezing.
Technical scheme: a kind of anchor cable construction method of passing through Soft Soil Layer of the present invention, comprises the steps:
(1) make steel bushing, steel bushing is comprised of seamless steel pipe merogenesis, and its aperture is identical with the anchor hole aperture of design, and every joint steel bushing one end is internal thread, and one end is outer silk, to facilitate steel bushing to connect;
(2) according to designing requirement, from supporting and protection structure outside, hole to Soft Soil Layer;
(3) steel bushing creeps into, one joint steel bushing is fixed on to the drill bit position of auger machine, adopts auger machine dry method merogenesis that steel bushing is crept in Soft Soil Layer, creep into length is a joint steel bushing length at every turn, drilling process alignment centralizer, guarantees anchor hole direction; Auger machine creeps into steel bushing after one joint length, stops creeping into, and adopts crawler type hidden hole drilling, carries out pore-forming operation in steel bushing, and merogenesis creeps into, and is circulated to successively anchor hole and passes Soft Soil Layer; Steel bushing forms a support system to anchor hole weak soil interval;
(4) continue to creep into pore-forming;
(5) anchor cable is installed;
(6) anchor rope grouting tensioning anchor seal, first carries out slip casting, after slip casting completes, treats that slurry intensity reaches designing requirement, just carries out anchorage cable stretching, sealing off and covering anchorage construction.
The method is being banketed and other soft layer all can be used.
Further improve technique scheme, the length of described every joint steel bushing is 1m, 2m or 3m.
Further, described every joint steel bushing adopts Q235 steel, wall thickness 5mm.
Compared with prior art, its beneficial effect is in the present invention: construction method of the present invention, in work progress, can guarantee that anchor hole becomes porosity 100%, greatly improves anchor hole and becomes porosity, increase work efficiency, and the reduction of erection time.Meanwhile, reduce the consumption of drill bit, reduce the loss of rig, bring certain economic benefit.
Accompanying drawing explanation
Fig. 1 is for adopting the weak soil anchor cable schematic diagram of construction method of the present invention.
In figure: A is foundation ditch; B is Soft Soil Layer; C is shale layer; D is fender post; E is steel bushing; F is anchor cable.
The specific embodiment
Below technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.
An anchor cable construction method of passing through Soft Soil Layer, comprises the steps:
(1) make steel bushing, steel bushing is comprised of seamless steel pipe merogenesis, and its aperture is identical with the anchor hole aperture of design, and every joint steel bushing adopts Q235 steel, wall thickness 5mm, length is 1m, 2m or 3m, every joint steel bushing one end is internal thread, and one end is outer silk, to facilitate steel bushing to connect;
(2) according to designing requirement, adopt auger machine dry method to hole to Soft Soil Layer from fender post outside;
(3) steel bushing creeps into, one joint steel bushing is fixed on to the drill bit position of auger machine, adopts auger machine dry method merogenesis that steel bushing is crept in Soft Soil Layer, creep into length is a joint steel bushing length at every turn, drilling process alignment centralizer, guarantees anchor hole direction; Auger machine creeps into after a joint steel bushing length, stops creeping into, and adopts crawler type hidden hole drilling, carries out pore-forming operation in steel bushing, and merogenesis creeps into, and is circulated to successively anchor hole and passes Soft Soil Layer; Steel bushing forms a support system to anchor hole weak soil interval, has guaranteed the quality of pore-forming;
(4) auger machine dry method continues to creep into pore-forming in shale layer;
(5) anchor cable is installed, i.e., after anchor hole moulding, carry out anchor cable installation;
(6) anchor rope grouting tensioning anchor seal, first carries out slip casting, after slip casting completes, treats that slurry intensity reaches designing requirement, just carries out anchorage cable stretching, sealing off and covering anchorage construction.
Fig. 1 is for adopting the weak soil anchor cable schematic diagram of above-mentioned construction method.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Not departing under the spirit and scope of the present invention prerequisite of claims definition, can make in the form and details various variations to it.
Claims (3)
1. an anchor cable construction method of passing through Soft Soil Layer, is characterized in that, comprises the steps:
(1) make steel bushing, steel bushing is comprised of seamless steel pipe merogenesis, and its aperture is identical with the anchor hole aperture of design, and every joint steel bushing one end is internal thread, and one end is outer silk;
(2) according to designing requirement, from supporting and protection structure outside, hole to Soft Soil Layer;
(3) steel bushing creeps into, and adopts auger machine dry method merogenesis that steel bushing is crept in Soft Soil Layer, and creep into length is a joint steel bushing length at every turn, and drilling process alignment centralizer guarantees anchor hole direction; Auger machine creeps into steel bushing after one joint length, stops creeping into, and adopts crawler type hidden hole drilling, carries out pore-forming operation in steel bushing, and merogenesis creeps into, and is circulated to successively anchor hole and passes Soft Soil Layer; Steel bushing forms a support system to anchor hole weak soil interval;
(4) continue to creep into pore-forming;
(5) anchor cable is installed;
(6) anchor rope grouting tensioning anchor seal, first carries out slip casting, after slip casting completes, treats that slurry intensity reaches designing requirement, just carries out anchorage cable stretching, sealing off and covering anchorage construction.
2. anchor cable construction method of passing through Soft Soil Layer according to claim 1, is characterized in that, the length of every joint steel bushing is 1m, 2m or 3m.
3. anchor cable construction method of passing through Soft Soil Layer according to claim 2, is characterized in that, every joint steel bushing adopts Q235 steel, wall thickness 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210332444.6A CN102797256B (en) | 2012-09-11 | 2012-09-11 | Anchor-rope construction method for passing through soft-soil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210332444.6A CN102797256B (en) | 2012-09-11 | 2012-09-11 | Anchor-rope construction method for passing through soft-soil layer |
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| Publication Number | Publication Date |
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| CN102797256A CN102797256A (en) | 2012-11-28 |
| CN102797256B true CN102797256B (en) | 2014-10-15 |
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| CN201210332444.6A Active CN102797256B (en) | 2012-09-11 | 2012-09-11 | Anchor-rope construction method for passing through soft-soil layer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088819B (en) * | 2013-02-22 | 2016-04-06 | 北京市政路桥股份有限公司 | Construction prestressed cable method |
| CN103911993B (en) * | 2014-04-18 | 2016-05-04 | 周同和 | A kind of PHA anchor pole and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4132498A (en) * | 1977-02-17 | 1979-01-02 | Shigeru Sugimura | Earth anchor and method of setting and removing same |
| CN101768967A (en) * | 2008-12-29 | 2010-07-07 | 郑鸿彰 | Soil anchor quick construction method and anchor thereof |
| CN101851922A (en) * | 2010-06-17 | 2010-10-06 | 昆明捷程桩工有限责任公司 | Method for eliminating underground anchor rope/rod by using all casing drill |
-
2012
- 2012-09-11 CN CN201210332444.6A patent/CN102797256B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4132498A (en) * | 1977-02-17 | 1979-01-02 | Shigeru Sugimura | Earth anchor and method of setting and removing same |
| CN101768967A (en) * | 2008-12-29 | 2010-07-07 | 郑鸿彰 | Soil anchor quick construction method and anchor thereof |
| CN101851922A (en) * | 2010-06-17 | 2010-10-06 | 昆明捷程桩工有限责任公司 | Method for eliminating underground anchor rope/rod by using all casing drill |
Non-Patent Citations (2)
| Title |
|---|
| 同心跟管钻孔技术在拱座基坑预应力锚索施工中的应用;邵东辉;《四川建材》;20120831;第38卷(第4期);第157页第1小节—第158页第4小节末及图1、3 * |
| 邵东辉.同心跟管钻孔技术在拱座基坑预应力锚索施工中的应用.《四川建材》.2012,第38卷(第4期),第157-158页. |
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| CN102797256A (en) | 2012-11-28 |
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