CN1487149A - High-grade prestressed bolt cable of compact rope for geotechnical engineering - Google Patents

High-grade prestressed bolt cable of compact rope for geotechnical engineering Download PDF

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Publication number
CN1487149A
CN1487149A CNA031422144A CN03142214A CN1487149A CN 1487149 A CN1487149 A CN 1487149A CN A031422144 A CNA031422144 A CN A031422144A CN 03142214 A CN03142214 A CN 03142214A CN 1487149 A CN1487149 A CN 1487149A
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CN
China
Prior art keywords
cable
anchor
anchoring
draw
interior
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CNA031422144A
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Chinese (zh)
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CN1206420C (en
Inventor
葛修润
葛以敏
周玉瑛
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葛修润
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Priority to CN 03142214 priority Critical patent/CN1206420C/en
Publication of CN1487149A publication Critical patent/CN1487149A/en
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Publication of CN1206420C publication Critical patent/CN1206420C/en

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Abstract

The present invention belongs to the field of geotechnical engineering. The anchor cable includes three sections, inner anchoring section, freely tensing section and outer anchoring section, and the freely tensing section includes several pieces of high-strength low-laxation cold drawn steel wires, rather than traditional steel strand, arranged along the anchor cable to form stable or notched hexagonal cross section. The steel wires of the anchor cable are twisted in great pitches and small twist angle and tied and settled with composite wrapping belt and two outer layers of hot extruded protective high density polyethylene pipe. The present invention has perfect antirust measures, prestress applied via drawing steel wires and balance stress, and may be freely tensed. The pull rod and conic pipe in the inner anchoring section have antisticking layer coated, and the cement cylinder has pressure applied and with properly dispersed pressure.

Description

The high-grade anchor cable of geotechnical engineering compact cable body prestressing force
Technical field
What the present invention relates to is a kind of geotechnical engineering anchor cable, and the high-grade anchor cable of particularly a kind of geotechnical engineering compact cable body prestressing force belongs to the geotechnical engineering field.
Background technology
Prestress anchorage cable is reinforcing means important in the geotechnical engineering.Domestic and international geotechnical engineering anchor cable, can be divided into two big classes by its service object, service life: a class is to be used for long temporary supporting of time, another kind of is ingredient as engineering structures, as permanent supporting and protection structure.The latter has repeatedly the requirement of free stretch-draw and permanent anti-corrosion to anchor cable.Though the former basic structure is basic identical with permanent anchor cable, owing to do not need repeatedly stretch-draw and short-term to use, thereby aspect such as anti-corrosion measure can be simplified.
Now, the geotechnical engineering prestressed anchor Cable Structure of international and domestic geotechnical engineering circle use is mostly similar.Find by literature search, " the Yellow River Xiao Langdi key water control project is imported and exported side slope construction phase stability study and reinforcing technique " (in October, 1998) the 222238th page that survey and design academy of Yellow River Water Conservancy Committee of Ministry of Water Resources etc. writes, introduced the concrete structure and the engineering applicable cases of anchor cable: adopting 7 strands of diameters is that 5 millimeters high strength low relaxed cold drawn wire is turned round and is hinged into steel strand, form the anchor cable cable body by many steel strand, for anticorrosion, the every outer grease of steel strand, and available PE cover parcel, also can adopt whole coating steel twisted wire; According to the tonnage of geotechnical engineering anchor cable, determine the steel strand radical, whole steel strand are arranged side by side in the inside and outside isolating frame that the hard PVC plastics make along the anchor cable total length around (putting an isolating frame about each rice), peripheral metal binding wire makes into as a whole.And be inserted in the pvc pipe; On the outer anchor head form anchor of drilling orifice a plurality of apertures are arranged, have a pair of intermediate plate to clamp per one steel strand in each hole; The interior anchoring section of permanent etch-proof ground prestress anchorage cable is broken steel strand, arrangement, oil removing.The outside is with the bellows of etch-proof metal (or plastics), by inside and outside the corrugated bushing respectively the cementing slurry with interior anchoring section gluing on borehole wall.
The structure of this cable body is that Grouting Pipe etc. are also in cable body inside with the built on stilts arrangement of many steel strand, and this class anchor cable cable body can be referred to as the non-compact cable body of steel strand structure.This non-compact cable body structure of being made up of steel strand has following shortcoming inevitably: (1) this type of geotechnical engineering anchor cable can not go out end product by plant produced, must establish interim composing room at the construction field (site).Workload is big, and difficulty is also big, is manual operations entirely, has increased cost.The quality of anchor cable finally depends on the quality of erection work.Therefore be difficult to guarantee that every the ground prestress anchorage cable that is used for engineering all has very high-quality.(2) the suffered load of anchor cable should evenly be shared by each bar steel strand, and is stressed evenly in order to guarantee each bar steel strand, drawing-off steel strand at first one by one when applying prestressing force, and then general synchronization drawing-off, Installation and Debugging process complexity.(3) adopt bellows, in installation process, whether have to damage to be difficult to find and check that in case damage is arranged, permanent anti-corrosion just is difficult to guarantee.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of high-grade anchor cable of geotechnical engineering compact cable body prestressing force of brand new is provided, makes it solve the non-compact cable body of the geotechnical engineering steel strand prestress anchorage cable above shortcomings of generally using at present.
The present invention is achieved by the following technical solutions, anchor cable of the present invention can be divided into three sections, be followed successively by interior anchoring section, free stretch-draw section cable body and outer anchoring section, interior anchoring section is in the boring terminal region, and outer anchoring section is near drilling orifice, and the centre is free stretch-draw section cable body, free stretch-draw section cable body is connected with outer anchoring section by outer anchor coupling, and free stretch-draw section cable body is connected with interior anchoring section by interior anchor coupling.
Free stretch-draw section cable body is not to adopt steel strand; but adopt high strength low relaxed cold drawn wire; free stretch-draw section cable body is axially closely arranged along anchor cable by many cold drawn wires; on the cross section, form regular hexagon or regular hexagon jaggy with stability; the steel wire of whole piece anchor cable twists into half-parallel steel cable again with compound band wrapping typing, the outer two-layer high-density polyethylene plastics protective sleeve of hot extrude of compound band by coarse pitch, little torsional angle.
Outer anchoring section is connected with free stretch-draw section cable body by outer anchor coupling, adopt chill casting anchor technology together with a client link of the steel wire of free stretch-draw section cable body and outer anchor coupling, the outer anchor hookup other end has internal thread, in order to connect leading screw, leading screw passes power transmission pier and the billet on the drilling orifice wall, nut is arranged on the leading screw, and the special-purpose drawbench that temporarily is installed in power transmission pier the place ahead is used nut check after the ground prestress anchorage cable being tightened to the tensile stress values of setting by the drawing leading screw.
Interior anchoring section is connected with free stretch-draw section cable body by interior anchor coupling, adopt chill casting anchor technology that the steel wire of interior anchor coupling one end and free stretch-draw section cable body is bound up, the other end of interior anchor coupling links to each other with stayed mast, interior anchor coupling external surface is the bearing surface of packer capsule, the packer capsule is provided with water injection pipe (or Grouting Pipe), by water injection pipe (or Grouting Pipe) the packer capsule is expanded, anchor hookup in inwardly the high-pressure slip-casting pipe of anchoring section slip casting and stack pass, by them inside anchoring section cementing slurry and venting air, because the packer capsule has cut off interior anchoring section and free stretch-draw section cable body, slurry can not flow to free stretch-draw section and go.Stayed mast and interior anchor coupling are with being threaded, and the length of stayed mast can be set as required, and the stayed mast other end and conical pipe link with internal thread.Conical pipe links to each other with disc-type baffle plate.External surface in stayed mast, conical pipe and disc-type baffle plate during installation scribbles and the inadherent coating of cement paste.Back formation cement cylindrical shell is solidified in interior anchoring section slip casting and borehole wall bonds together, and stayed mast, conical pipe and disc-type baffle plate and the not adhesion mutually of cement cylindrical shell.
One end and the leading screw of outer anchor hookup link, after the anchoring section slurry solidified in treating, when applying prestressing force for the whole piece anchor cable in the aperture by the drawing leading screw, stayed mast, conical pipe and baffle plate can relatively move to the aperture direction, exert pressure to the cement cylindrical shell, thereby load is married again the hole wall geotechnical body.Interior anchoring section cement cylindrical shell stress belongs to anchoring section in the pressure-type based on compressive stress.The tapering of conical pipe is very little, but can play the cement cylindrical shell is more pressed the tight effect of healing, and the geotechnical body that makes the load of bearing of anchor cable be delivered to hole wall well gets on, and plays the effect that disperses pressure.For the large-tonnage anchor cable, stayed mast, conical pipe repeatedly can be connected in series to reach the effect of further dispersion load.
The geotechnical engineering compact cable body prestress anchorage cable that proposes according to the present invention, cable body and inside and outside coupling and packer all can be made in factory and be assembled, and can coil into about about the 2 meters diskware of diameter as the finished product rope when dispatching from the factory, and it is very convenient to transport for long-distance.After anchor cable is transported to the building site, only need anchor cable is trembled out, load onto the leading screw that ships simultaneously, stayed mast, conical pipe and baffle plate are also coated the coating not sticking with cement paste, connect corresponding water injection pipe, Grouting Pipe and stack posterior restoration anchor cable just install, and can directly send into boring and suffer.
In order to guarantee perfect stainless property, can adopt the steel wire of zinc-coated wire or plating epoxy resin, but the hole filling anti-corrosion grease between interior anchor hookup and the stayed mast and between outer anchor hookup and the leading screw with the O RunddichtringO is set.
The novel pre-stressed anchor cable of geotechnical engineering that the present invention proposes has the permanent anti-corrosion function and the function of free stretch-draw repeatedly, so is the novel high-grade anchor cable in the geotechnical engineering.Geotechnical engineering compact cable body prestress anchorage cable is very suitable to the large-tonnage anchor cable, and for example when adopting 79 cold drawn wires that diameter is 7mm, the intensity of steel wire grade is σ bThe nominal Breaking load of whole piece anchor cable can reach more than the 5000KN during=1670Mpa, therefore can satisfy the requirement of 3000KN prestress anchorage cable, as take the higher steel wire of intensity, the anchor cable of same grade can further reduce the steel wire radical, makes the also not special difficulty of anchor cable of 5000KN~6000KN.
The present invention has substantive distinguishing features and marked improvement, the present invention compared with prior art, the measure of anti-corrosion is safe and reliable; The compact cable body is free stretch-draw type, can repeatedly adjust prestress value repeatedly; The cement cylindrical shell stress of interior anchoring section is a pressure-type; Conical pipe makes and acts on load dispersion on the drill hole wall, only needs the drawing leading screw to get final product when applying prestressing force, and is very simple; Compact cable body steel wire is stressed very even; Batch production production geotechnical engineering prestress anchorage cable energy strict guarantee product high-quality; Must not establish the site assembly workshop, exempt on-the-spot numerous and diverse erection work and reduced cost; The finished product anchor cable of plant produced can coil into the diskware about diameter 2m, and long-distance transport is convenient; After transporting the building site to, connect relevant parts and pipe, just can install in boring, both saved time, it is convenient to save money again.
Description of drawings
Fig. 1 geotechnical engineering anchor cable structure of the present invention schematic diagram
The free stretch-draw section of Fig. 2 cable body cross-sectional structure schematic diagram
The specific embodiment
As depicted in figs. 1 and 2, anchor cable of the present invention can be divided into three sections, anchoring section 1 in being followed successively by, free stretch-draw section cable body 2 and outer anchoring section 3, interior anchoring section 1 is in the boring terminal region, and outer anchoring section 3 is near drilling orifice, and the centre is free stretch-draw section cable body 2, free stretch-draw section cable body 2 is connected with outer anchoring section 3 by outer anchor coupling 4, and free stretch-draw section cable body 2 is connected with interior anchoring section 1 by interior anchor coupling 9.
Free stretch-draw section cable body 2 adopts high strength low relaxed cold drawn wire 19; free stretch-draw section cable body 2 is axially closely arranged along anchor cable by many cold drawn wires 19; on the cross section, form regular hexagon or regular hexagon jaggy with stability; the steel wire 19 of whole piece anchor cable twists into half-parallel steel cable again with compound band 20 wrapping typings, the two-layer high-density polyethylene plastics protective sleeve 21,22 of compound band 20 outer hot extrudes by coarse pitch, little torsional angle.
Interior anchoring section 1 is connected with free stretch-draw section cable body 2 by interior anchor coupling 9, adopt chill casting anchor technology that the steel wire 19 of interior anchor coupling 9 one ends and free stretch-draw section cable body 2 is bound up, the other end of interior anchor coupling 9 links to each other with stayed mast 10, interior anchor coupling 9 external surfaces are the bearing surface of packer capsule 11, packer capsule 11 is provided with water injection pipe or Grouting Pipe 12, high-pressure slip-casting pipe and stack 13 pass interior anchor hookup 9, stayed mast 10 is threaded with interior anchor coupling 9 usefulness, the length of stayed mast 10 can be set as required, stayed mast 10 other ends and conical pipe 14 usefulness internal threads link, conical pipe 14 links to each other with disc-type baffle plate 15, during installation at stayed mast 10 and conical pipe 14, the external surface of disc-type baffle plate 15 scribbles the non-caked coating 16 of cement paste, after interior anchoring section 1 slip casting is solidified, cement cylindrical shell 17 bonds together with borehole wall 18, and stayed mast 10 and conical pipe 14 and not adhesion mutually of cement cylindrical shell 17.
Interior anchor hookup 9 forms a whole with packer capsule 11, and is provided with the interface arrangement of water filling, slip casting, vent ports.The tapering of conical pipe 14 is very little, for the large-tonnage anchor cable, and can be with more than 14 serial connection of stayed mast 10, conical pipe, to disperse load.
Outer anchoring section 3 is connected with free stretch-draw section cable body 2 by outer anchor coupling 4, adopt chill casting anchor technology together with a client link of the steel wire of free stretch-draw section cable body 2 and outer anchor coupling 4, outer anchor hookup 4 other ends have internal thread, in order to connect leading screw 5, leading screw 5 passes power transmission pier 6 and the billet 7 on the drilling orifice wall, nut 8 is arranged on the leading screw, and the special-purpose drawbench that temporarily is installed in power transmission pier the place ahead is tightened to anchor cable by drawing leading screw 5 after the tensile stress values of setting with nut 8 lockings.
Free stretch-draw section cable body 2 steel wires are selected the steel wire of zinc-coated wire or plating epoxy resin for use, to increase the resistant to rust ability.Pore filling anti-corrosion grease between interior anchor hookup 9 and the stayed mast 10, between outer anchor hookup 4 and the leading screw 5 and O RunddichtringO is set.After anchoring section 1 slurry solidifies in treating, when applying prestressing force for the whole piece anchor cable by drawing leading screw 5 in the aperture, stayed mast 10, conical pipe 14 and baffle plate 15 can relatively move to the aperture direction.Cement cylindrical shell stress is based on compressive stress, more press tighter, produce between cement cylindrical shell and drill hole wall huge shear stress and normal stress with load transfer on geotechnical body.

Claims (7)

1; the high-grade anchor cable of a kind of geotechnical engineering compact cable body prestressing force; comprise: interior anchoring section (1); free stretch-draw section cable body (2) and outer anchoring section (3); it is characterized in that; interior anchoring section (1) is in the boring terminal region; outer anchoring section (3) is near drilling orifice; the centre is a free stretch-draw section cable body (2); free stretch-draw section cable body (2) is connected with outer anchoring section (3) by outer anchor coupling (4); free stretch-draw section cable body (2) is connected with interior anchoring section (1) by interior anchor coupling (9); free stretch-draw section cable body (2) adopts high strength low relaxed cold drawn wire (19); free stretch-draw section cable body (2) is axially closely arranged along anchor cable by many cold drawn wires (19); on the cross section, form regular hexagon or regular hexagon jaggy with stability; the steel wire of whole piece anchor cable (19) is pressed coarse pitch; little torsional angle twists into half-parallel steel cable and uses compound band (20) wrapping typing, the two-layer high-density polyethylene plastics protective sleeve of the outer hot extrude of compound band (20) (21) again; (22).
2, the high-grade anchor cable of geotechnical engineering compact cable body prestressing force according to claim 1 is characterized in that, free stretch-draw section cable body (2) adopts high strength low relaxed cold drawn wire zinc-plated or plating epoxy resin, forms the compact cable body.
3, the high-grade anchor cable of geotechnical engineering compact cable body prestressing force according to claim 1, it is characterized in that, interior anchoring section (1) is connected with free stretch-draw section cable body (2) by interior anchor coupling (9), adopt chill casting anchor technology that the steel wire (19) of interior anchor coupling (9) one ends and free stretch-draw section cable body (2) is bound up, the other end of interior anchor coupling (9) links to each other with stayed mast (10), interior anchor coupling (9) external surface is the bearing surface of packer capsule (11), packer capsule (11) is provided with water injection pipe or Grouting Pipe (12), high-pressure slip-casting pipe and stack (13) pass interior anchor hookup (9), stayed mast (10) and interior anchor coupling (9) are with being threaded, stayed mast 10 other ends and conical pipe (14) link with internal thread, conical pipe (14) links to each other with disc-type baffle plate (15), during installation at stayed mast (10) and conical pipe (14), the external surface of disc-type baffle plate (15) scribbles the non-caked coating of cement paste (16), after interior anchoring section (1) slip casting was solidified, cement cylindrical shell (17) bonded together with borehole wall (18).
4, the high-grade anchor cable of geotechnical engineering compact cable body prestressing force according to claim 3 is characterized in that interior anchor hookup (9) forms a whole with packer capsule (11), and is provided with the interface arrangement of water filling, slip casting, vent ports.
5, the high-grade anchor cable of geotechnical engineering compact cable body prestressing force according to claim 3 is characterized in that the tapering of conical pipe (14) is very little, for the large-tonnage anchor cable, stayed mast (10), conical pipe (14) repeatedly can be connected in series, with further dispersion load.
6, the high-grade anchor cable of geotechnical engineering compact cable body prestressing force according to claim 1, it is characterized in that, outer anchoring section (3) is connected with free stretch-draw section cable body (2) by outer anchor coupling (4), adopt chill casting anchor technology together with a client link of the steel wire of free stretch-draw section cable body (2) and outer anchor coupling (4), outer anchor hookup (4) other end has internal thread, in order to connect leading screw (5), leading screw (5) passes power transmission pier (6) and the billet (7) on the drilling orifice wall, nut (8) is arranged on the leading screw, and the special-purpose drawbench that temporarily is installed in power transmission pier the place ahead is tightened to anchor cable by drawing leading screw (5) after the tensile stress values of setting with nut (8) locking.
7, according to claim 3 or the high-grade anchor cable of 6 described geotechnical engineering compact cable body prestressing force, it is characterized in that the pore filling anti-corrosion grease between interior anchor hookup (9) and the stayed mast (10), between outer anchor hookup (4) and the leading screw (5) and the O RunddichtringO is set.
CN 03142214 2003-08-12 2003-08-12 High-grade prestressed bolt cable of compact rope for geotechnical engineering CN1206420C (en)

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Application Number Priority Date Filing Date Title
CN 03142214 CN1206420C (en) 2003-08-12 2003-08-12 High-grade prestressed bolt cable of compact rope for geotechnical engineering

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Application Number Priority Date Filing Date Title
CN 03142214 CN1206420C (en) 2003-08-12 2003-08-12 High-grade prestressed bolt cable of compact rope for geotechnical engineering

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CN1487149A true CN1487149A (en) 2004-04-07
CN1206420C CN1206420C (en) 2005-06-15

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103147440A (en) * 2013-03-14 2013-06-12 黄河勘测规划设计有限公司 Construction method of prestressed anchor cable
CN103195061A (en) * 2013-04-07 2013-07-10 浙江华东建设工程有限公司 Multi-functional casing pipe part and anchor rod construction method using same
CN103572701A (en) * 2013-10-08 2014-02-12 中铁十八局集团有限公司 Buckling anchor system combined rock anchor
CN103883339A (en) * 2014-04-11 2014-06-25 衢州市优德工业设计有限公司 Anchor cable supporting method for repeated application of prestress
CN104405424A (en) * 2014-11-17 2015-03-11 神华集团有限责任公司 Full-length-anchoring anchor rod and anchoring method
CN105804774A (en) * 2014-04-11 2016-07-27 衢州市优德工业设计有限公司 Anchor cable capable of repeatedly applying prestress in mine tunnel

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103147440A (en) * 2013-03-14 2013-06-12 黄河勘测规划设计有限公司 Construction method of prestressed anchor cable
CN103147440B (en) * 2013-03-14 2015-07-29 黄河勘测规划设计有限公司 Construction prestressed cable method
CN103195061A (en) * 2013-04-07 2013-07-10 浙江华东建设工程有限公司 Multi-functional casing pipe part and anchor rod construction method using same
CN103195061B (en) * 2013-04-07 2015-05-06 浙江华东建设工程有限公司 Multi-functional casing pipe part and anchor rod construction method using same
CN103572701A (en) * 2013-10-08 2014-02-12 中铁十八局集团有限公司 Buckling anchor system combined rock anchor
CN103883339A (en) * 2014-04-11 2014-06-25 衢州市优德工业设计有限公司 Anchor cable supporting method for repeated application of prestress
CN103883339B (en) * 2014-04-11 2016-03-23 衢州市优德工业设计有限公司 A kind of cable bolting method repeating Shi Hanzhang
CN105804774A (en) * 2014-04-11 2016-07-27 衢州市优德工业设计有限公司 Anchor cable capable of repeatedly applying prestress in mine tunnel
CN105804774B (en) * 2014-04-11 2017-09-19 衢州市优德工业设计有限公司 A kind of mine laneway is repeatable to apply prestressed anchor cable
CN104405424A (en) * 2014-11-17 2015-03-11 神华集团有限责任公司 Full-length-anchoring anchor rod and anchoring method

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