CN103147440B - Construction prestressed cable method - Google Patents
Construction prestressed cable method Download PDFInfo
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- CN103147440B CN103147440B CN201310081194.8A CN201310081194A CN103147440B CN 103147440 B CN103147440 B CN 103147440B CN 201310081194 A CN201310081194 A CN 201310081194A CN 103147440 B CN103147440 B CN 103147440B
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- anchor cable
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- draw section
- grouted part
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Abstract
The invention discloses a kind of construction prestressed cable method, bore anchor cable hole according to designing requirement, make anchor cable, anchor cable, apeak pier, anchor cable hole slip casting, stretch-draw anchor are installed; Grouted part is alternately arranged on bunch ring on steel strand by interval and isolating frame makes bellows-shaped, the isolating frame that stretch-draw section is arranged on steel strand by interval makes rectilinear form, every root steel strand of stretch-draw section are all set with sleeve pipe, and its lower end portion is positioned at grout stop position and is sealed by structure glue; Anchor cable hole slip casting: be first in the milk in stretch-draw section anchor cable hole by stretch-draw section grout pipe, after mortar solidifies, is in the milk by grouted part grout pipe, after grouted part has been in the milk, carries out stretch-draw anchor step in grouted part anchor cable hole.The invention has the advantages that the stretch-draw section that grouting is completed becomes the grout stop of grouted part grouting, no matter under which kind of rock mass condition, all can ensure grouting effect, thus ensure whole anchor cable quality.
Description
Technical field
The present invention relates to the prestress anchorage cable for rock mass reinforcing, especially relate to construction prestressed cable method.
Background technology
Prestress anchorage cable for rock mass reinforcing generally adopts back-grouting formula, adopts grout stop to separate between grouted part and stretch-draw section.When anchor cable construction, first first time grouting is carried out to grouted part, form complete Anchoring part, then stretch-draw is carried out to anchor cable, finally second time grouting is carried out to stretch-draw section.Owing to often there is space between grout stop and anchor cable hole hole wall, cause grouting effect poor, not only cause stretch-draw segment length difficulty or ease to ensure, and grouted part grouting pressure also not easily ensures, cause anchor cable Shi Hanzhang effect poor.If when running into the poor situation of geological conditions, even if adopt some proprietary technology, due to grouting segment length only about 400mm, be still difficult to the grouting quality and the prestressing force effect that ensure grouted part completely.
Summary of the invention
The object of the invention is to provide a kind of construction prestressed cable method.
For achieving the above object, the present invention takes following technical proposals:
Construction prestressed cable method of the present invention, comprises the steps: to bore anchor cable hole according to designing requirement, make anchor cable, install anchor cable, apeak pier, anchor cable hole slip casting, stretch-draw anchor; Described making anchor cable step is: anchor cable is made up of grouted part, stretch-draw section, the grout stop be arranged between described grouted part and stretch-draw section interface; Grouted part is alternately arranged on bunch ring on steel strand by interval and isolating frame makes bellows-shaped, the isolating frame that stretch-draw section is arranged on steel strand by interval makes rectilinear form, the every root steel strand being positioned at stretch-draw section are all set with sleeve pipe, described its lower end portion is positioned at grout stop position and is sealed by structure glue, axially stack, stretch-draw section grout pipe, grouted part grout pipe is laid along anchor cable hole, described stack one end extends to grouted part through grout stop, and the other end extends stretch-draw section; Then described apeak pier step is carried out; Described anchor cable hole slip casting step is: be first in the milk in stretch-draw section anchor cable hole by stretch-draw section grout pipe, grouting pressure is 0.2-0.3 MPa, after mortar solidifies, be in the milk in grouted part anchor cable hole by grouted part grout pipe, grouting pressure is 0.8-2 MPa; After grouted part has been in the milk, carry out described stretch-draw anchor step.
Advantage major embodiment of the present invention is:
1, during grouting construction, first in stretch-draw section anchor cable hole, carry out low-pressure grouting, the stretch-draw section that grouting is completed becomes the grout stop of grouted part grouting, no matter under which kind of rock mass condition, all can ensure grouting effect, thus ensures whole anchor cable quality.
2, avoid the forfeiture when causing stretch-draw section function under grout stop failure conditions, and cause whole anchor cable not reach predictive role, guarantee that stretch-draw section is effective, significantly improve anchor cable yield rate when rock mass condition is poor.
3, ensure and try one's best and improve the grouting pressure of grouted part, increasing anchoring effect.
4, the stretch-draw section steel strand sleeve pipe cost increased is very low, to lose efficacy the loss of doing over again caused, and guaranteeing, under workmanship prerequisite, to improve overall economic efficiency much smaller than grout stop.
Accompanying drawing explanation
Fig. 1 is the prestress anchorage cable structural representation according to the inventive method construction.
Fig. 2 is the A-A portion cross-section structure enlarged diagram of Fig. 1.
Fig. 3 is the I portion structure for amplifying schematic diagram of Fig. 1.
Detailed description of the invention
As shown in Figure 1, 2, 3, construction prestressed cable method of the present invention, carry out according to following step:
The first step, according to designing requirement adopt boring method bore anchor cable hole 1;
Second step, by design length make anchor cable: anchor cable is made up of grouted part 3, stretch-draw section 4, the grout stop 5 be arranged between grouted part 3 and stretch-draw section 4 interface, grouted part 3 is alternately arranged on bunch ring 7 on many steel strand 6 by interval and isolating frame 8 makes bellows-shaped, the isolating frame 8 that stretch-draw section 4 is arranged on many steel strand 6 by interval makes rectilinear form, the every root steel strand 6 being positioned at stretch-draw section 4 are all set with sleeve pipe 9, every root sleeve pipe 9 lower end part is all sealed by structure glue 10 in grout stop 5 position, during to avoid being in the milk, mortar enters in the space in sleeve pipe 9 and between steel strand 6, axially stack 11 is laid along anchor cable hole 1, stretch-draw section grout pipe 12, grouted part grout pipe 13, stack 11 one end extends to grouted part 3 through grout stop 5, then in stretch-draw section 4 termination, guide thimble 14 is installed, two bifurcated pipes 15 are upwards welded with in the tube wall surface thereof of guide thimble 14, 16, stack 11 other end extends stretch-draw section 4 from a bifurcated pipe 15, stretch-draw section grout pipe 12, grouted part grout pipe 13 extends stretch-draw section 4 from another bifurcated pipe 16,
3rd step, installation anchor cable:
The anchor cable made by second step is sent in anchor cable hole 1, makes guide thimble 14 be positioned at the orifice position of anchor cable hole 1;
4th step, apeak pier 2:
The effect of anchor pier 2 is that the point load of ground tackle 17 is delivered to scar and adjustment scar Impact direction, in order to make anchor pier 2 upper surface and anchor cable axes normal, weld one piece of backing plate 18 guide thimble 14 nozzle position is orthogonal, every root steel strand 6 upper end is all extended outside guide thimble 14 through backing plate 18, then builds anchor pier 2;
5th step, to slip casting in anchor cable hole 1:
First in the anchor cable hole 1 of stretch-draw section 4, low-pressure grouting is carried out by stretch-draw section grout pipe 12, grouting pressure is 0.2-0.3 MPa, after mortar solidifies, carry out high pressure grouting by grouted part grout pipe 13 in the anchor cable hole 1 of grouted part 3, grouting pressure is 0.8-2 MPa;
6th step, after grouted part 3 has been in the milk in the 5th step, carry out stretch-draw anchor step.
Claims (1)
1. a construction prestressed cable method, comprises the steps: to bore anchor cable hole (1) according to designing requirement, make anchor cable, install anchor cable, apeak pier (2), anchor cable hole (1) slip casting, stretch-draw anchor, it is characterized in that: described making anchor cable step is: anchor cable is made up of grouted part (3), stretch-draw section (4), the grout stop (5) be arranged between described grouted part (3) and stretch-draw section (4) interface, grouted part (3) is alternately arranged on bunch ring (7) on steel strand (6) by interval and isolating frame (8) makes bellows-shaped, the isolating frame (8) that stretch-draw section (4) is arranged on steel strand (6) by interval makes rectilinear form, the every root steel strand (6) being positioned at stretch-draw section (4) are all set with sleeve pipe (9), described sleeve pipe (9) lower end part is sealed in grout stop (5) position by structure glue (10), axially stack (11) is laid along anchor cable hole (1), stretch-draw section grout pipe (12), grouted part grout pipe (13), described stack (11) one end extends to grouted part (3) through grout stop (5), the other end extends stretch-draw section (4), then described apeak pier (2) step is carried out, described anchor cable hole (1) slip casting step is: be first in the milk in stretch-draw section anchor cable hole (1) by stretch-draw section grout pipe (12), grouting pressure is 0.2-0.3 MPa, after mortar solidifies, be in the milk in grouted part anchor cable hole (1) by grouted part grout pipe (13), grouting pressure is 0.8-2 MPa, after grouted part (3) has been in the milk, carry out described stretch-draw anchor step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310081194.8A CN103147440B (en) | 2013-03-14 | 2013-03-14 | Construction prestressed cable method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310081194.8A CN103147440B (en) | 2013-03-14 | 2013-03-14 | Construction prestressed cable method |
Publications (2)
| Publication Number | Publication Date |
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| CN103147440A CN103147440A (en) | 2013-06-12 |
| CN103147440B true CN103147440B (en) | 2015-07-29 |
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| CN201310081194.8A Active CN103147440B (en) | 2013-03-14 | 2013-03-14 | Construction prestressed cable method |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883341B (en) * | 2014-04-11 | 2016-05-18 | 衢州市优德工业设计有限公司 | One can repeat to apply prestressed anchor cable |
| CN104018499B (en) * | 2014-05-26 | 2016-06-15 | 中国水电顾问集团贵阳勘测设计研究院有限公司 | A kind of grouting method saving prestress anchorage cable stretch-draw section grouting amount |
| CN104895072B (en) * | 2015-04-08 | 2018-04-27 | 中国建筑第八工程局有限公司 | A kind of prestress anchorage cable and prestress anchorage cable one-pass molding construction method |
| CN105926650B (en) * | 2016-07-04 | 2018-07-06 | 青岛一建集团有限公司 | Slope surface building concrete layer landslide-proofing fixing device |
| CN105973559B (en) * | 2016-07-04 | 2018-11-20 | 青岛一建集团有限公司 | Motor train unit body hits rigid wall testing platform system |
| CN106120817B (en) * | 2016-07-04 | 2018-07-03 | 青岛一建集团有限公司 | A kind of slope surface building concrete layer landslide-proofing construction technology |
| CN106065595B (en) * | 2016-08-05 | 2018-06-29 | 青岛一建集团有限公司 | Motor train unit body bump test platform-specific fender pile |
| CN106284394B (en) * | 2016-08-05 | 2018-08-21 | 青岛一建集团有限公司 | Motor train unit body bump test platform-specific protects pile constructing process |
| CN106522220A (en) * | 2017-01-03 | 2017-03-22 | 北京航勘建设有限公司 | Partitioned high-pressure hole blockage grouting anchor rod and grouting method thereof |
| CN109113773A (en) * | 2018-08-21 | 2019-01-01 | 中铁工程设计咨询集团有限公司 | A kind of quick tensioning anchor cable structure and its construction method |
| CN109681252A (en) * | 2019-01-17 | 2019-04-26 | 平顶山平煤设计院有限公司 | A kind of slip casting combination of steel rope device and construction method |
| CN110004927A (en) * | 2019-03-27 | 2019-07-12 | 招商局重庆交通科研设计院有限公司 | Prestressing force miniature pile construction method |
| CN111945726A (en) * | 2020-08-21 | 2020-11-17 | 中国电建集团贵阳勘测设计研究院有限公司 | Construction method of strong unloading broken rock mass prestressed anchor cable |
| CN112176994B (en) * | 2020-08-22 | 2021-09-28 | 浙江华东工程咨询有限公司 | Construction method of prestressed anchor cable structure suitable for broken rock mass |
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| DE2443282A1 (en) * | 1974-06-19 | 1976-01-02 | Losinger Ag | METHOD AND MEANS OF DISMANTLING A PRE-TENSIONED STEEL ANCHOR ANCHORED IN THE GROUND |
| CN2331700Y (en) * | 1998-04-30 | 1999-08-04 | 杨俊志 | Free-type pull-pressing compound prestressed anchorage cable |
| CN1487149A (en) * | 2003-08-12 | 2004-04-07 | 葛修润 | High-grade prestressed bolt cable of compact rope for geotechnical engineering |
| CN2667007Y (en) * | 2003-07-24 | 2004-12-29 | 柳州欧维姆机械股份有限公司 | Multi-stage prestressed finished anchorage cable |
| CN2756708Y (en) * | 2003-11-08 | 2006-02-08 | 廖小平 | Full length adhesive prestress anchor rod |
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2013
- 2013-03-14 CN CN201310081194.8A patent/CN103147440B/en active Active
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| DE2443282A1 (en) * | 1974-06-19 | 1976-01-02 | Losinger Ag | METHOD AND MEANS OF DISMANTLING A PRE-TENSIONED STEEL ANCHOR ANCHORED IN THE GROUND |
| CN2331700Y (en) * | 1998-04-30 | 1999-08-04 | 杨俊志 | Free-type pull-pressing compound prestressed anchorage cable |
| CN2667007Y (en) * | 2003-07-24 | 2004-12-29 | 柳州欧维姆机械股份有限公司 | Multi-stage prestressed finished anchorage cable |
| CN1487149A (en) * | 2003-08-12 | 2004-04-07 | 葛修润 | High-grade prestressed bolt cable of compact rope for geotechnical engineering |
| CN2756708Y (en) * | 2003-11-08 | 2006-02-08 | 廖小平 | Full length adhesive prestress anchor rod |
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| 双层保护预应力锚索的设计和施工要点;翟才旺 等;《水利水电技术》;20010731;第32卷(第7期);第32-34页 * |
| 唐旭 等.边坡堆积体锚索防腐及注浆工艺探讨.《探矿工程(岩土钻掘工程)》.2011,第38卷(第11期),第80-82页. * |
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| CN103147440A (en) | 2013-06-12 |
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Address after: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee after: Yellow River Survey Planning and Design Research Institute Co., Ltd. Address before: 450003 Jinshui Road 109, Zhengzhou City, Henan Province Patentee before: Yellow River Engineering Consulting Co., Ltd. |
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