CN204267064U - Embedded classification constant-resistance shearing resistance large deformation anchor device - Google Patents

Embedded classification constant-resistance shearing resistance large deformation anchor device Download PDF

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Publication number
CN204267064U
CN204267064U CN201420654400.XU CN201420654400U CN204267064U CN 204267064 U CN204267064 U CN 204267064U CN 201420654400 U CN201420654400 U CN 201420654400U CN 204267064 U CN204267064 U CN 204267064U
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CN
China
Prior art keywords
deformation
anchor cable
resistance
anchor
metal coating
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CN201420654400.XU
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Chinese (zh)
Inventor
韩立军
孟庆彬
蔚立元
宗义江
陈廷学
章俊
李�昊
李俊
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中国矿业大学
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Priority to CN201420654400.XU priority Critical patent/CN204267064U/en
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Publication of CN204267064U publication Critical patent/CN204267064U/en

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Abstract

A kind of embedded classification constant-resistance shearing resistance large deformation anchor device; comprise the aperture anchor cable lock being positioned at steel strand anchor cable body revealed section; also comprise be located at anchor cable hole aperture section plastics in guide pipe and be set in the metal coating sleeve of guide pipe outside in plastics; the elastoplasticity compressible material that I, II, III level yield load are different is filled with between guide pipe and metal coating sleeve successively in plastics; the front end of described metal coating sleeve is provided with fixing termination, and the rear end of metal coating sleeve is provided with cover plate and metal caul.Utilize the plasticity of different elastoplasticity compressible material to compress and allow compressive strain performance, when country rock generation large deformation, this device can synchronously realize classification constant resistance and large deformation, ensure that the anchor structure of anchor cable does not destroy, allow moderate finite deformation to occur to adapt to the large deformation requirement of heavily stressed broken surrounding rock, adapt to the multiple actions such as embedded, the classification constant-resistance of deep wall rock characteristic, large deformation and shearing resistance, have that structure is simple, stable performance, be easy to the features such as popularization.

Description

Embedded classification constant-resistance shearing resistance large deformation anchor device
Technical field
The utility model relates to a kind of shearing resistance large deformation anchor device, especially a kind of embedded classification constant-resistance shearing resistance large deformation anchor cable structure device being applicable to the engineering field supportings such as mine working, tunnel, side slope, foundation ditch and reinforcing.
Background technology
After the 1950's, along with the fast development of prestressing technique, ground anchorage theory, method for designing, code and specification are perfect gradually, and anchor cable aseptic technic is also in continuous progress, and prestress anchorage cable technology is tending towards constantly improving state.Prestress anchorage cable structure types is various, and along with the expansion of engineer applied scope and the raising day by day of demand, and this technology obtains to be updated and perfect.Prestressed anchorage technology has been widely used in multiple fields rock-reinforcing and support engineering, and have accumulated abundant engineering experience.
Along with the continuous increase of the mining degree of depth, the Large scale construction of the construction of tunnel such as highway, railway, water conservancy and hydropower, the geological conditions faced becomes increasingly complex, and country rock often shows large deformation characteristic.When rock deformation is comparatively large, when exceeding the elastic limit deformation range that anchor cable can bear, will cause anchor cable that disrumpent feelings inefficacy occurs, and then cause the generation of underground construction unstability accident.In this case the anchor cable body that requirement uses possesses larger deformability while country rock generation large deformation produces larger tensile stress and itself does not destroy, to adapt to the requirement of deep wall rock large deformation, and then suitably reduce overall supporting power, effectively control support cost.In the fields such as Soft Rock Slope, foundation ditch, mine working and deep underground construction, when applying traditional prestressing anchor support, because the steel strand yield deformation amount adopted is only 3 ~ 5% of cable body drift, when surrouding rock deformation is larger, when exceeding its yield strength after causing anchor cable tension force deformation, then anchor cable can be caused to occur to play frangible fracture.Meanwhile, because the distortion of aperture broken surrounding rock can produce larger transverse shear stresses, and then anchor cable body generation lateral shear can be caused to destroy, cause the tensile strength of anchor cable not to be fully used.
Utility model content
Technical problem: the purpose of this utility model is the weak point overcome in prior art, provides the embedded classification constant-resistance shearing resistance large deformation anchor device that a kind of Stability Analysis of Structures, safe and reliable, easy to operate, constant Support Resistance are higher.
Technical scheme: for achieving the above object, embedded classification constant-resistance shearing resistance large deformation anchor device of the present utility model, comprise the aperture anchor cable lock being positioned at steel strand anchor cable body revealed section, also comprise be located at anchor cable hole aperture section plastics in guide pipe, with the metal coating sleeve being set in guide pipe outside in plastics, I is filled with successively between guide pipe and metal coating sleeve in plastics, II, the elastoplasticity compressible material that III level yield load is different, the front end of described metal coating sleeve is provided with fixing termination, the rear end of metal coating sleeve is provided with cover plate and metal caul.
Described elastoplasticity compressible material by the metal of different size by pressure pipe be located at metal and form by the resin in pressure pipe.
Beneficial effect: owing to have employed technique scheme, the utility model allows compressive strain by the classification of dissimilar elastoplasticity compressible material, realizes the classification constant resistance and large deformation function of this device.Anchor cable forms the complex protection structure be made up of metal caul and metal sleeve in aperture section; the high transverse shear stresses that aperture section broken surrounding rock is formed can be resisted; improve and improve anchor cable aperture section and bear transverse shear stresses ability, the shear failure avoiding anchor cable body destroys.Be applicable to the engineering field such as supporting and reinforcing of Soft Rock Slope, deep foundation ditch, mine working and deep underground construction.When country rock generation large deformation, tension can be continued extend and rupture failure does not occur itself, permission anchor cable body produces moderate finite deformation and can not cause the destruction unstability of this device, allows anchor cable structure to produce moderate finite deformation to adapt to the large deformation requirement of heavily stressed broken surrounding rock.This device anchor cable physical efficiency keeps constant working resistance in the process, surrouding rock deformation energy is constantly absorbed by the large deformation of anchor structure, keep monolithic stability and the safety of country rock and supporting and protection structure, and solve in existing cable bolting exist utilize merely anchor cable tensile strength, the disrumpent feelings Problem of Failure of anchor cable occurred when causing transverse shear stresses to exceed anchor cable shear strength.Therefore, the utility model can pass through its classification constant resistance and large deformation characteristic, produces a certain amount of deformation condition cable body that casts anchor still can provide the excessive deformation of constant Support Resistance restriction country rock at country rock.From the angle of opposing transverse shear stresses, improve the shear strength of anchor cable body by protection sleeve, prevent because transverse shear stresses is excessive, exceed anchor cable ultimate shearing strength and occur to shear disrumpent feelings.Whole anchor device possesses the multiple actions such as classification constant-resistance, large deformation and shearing resistance, and have that structure is simple, stable performance, cost are low, applied widely, be easy to the features such as popularization.
Accompanying drawing explanation
Fig. 1 is boring schematic diagram of the present utility model.
In figure: 1-country rock body, 2-anchor cable hole, 3-expanded hole; 4-steel strand anchor cable body; 5-metal coating sleeve, 6-elastoplasticity compressible material, 7-aperture anchor cable lock; 8-metal caul; 9-plastic spacer, 10-metal caul, 11-fixes termination; 12-cover plate, guide pipe in 13-plastics.
Detailed description of the invention
Below in conjunction with accompanying drawing, utility model embodiment is further described:
Embedded classification constant-resistance shearing resistance large deformation anchor device of the present utility model; comprise the aperture anchor cable lock 7 being positioned at steel strand anchor cable body 4 revealed section; also be included in be located at anchor cable hole 2 aperture section plastics in guide pipe 13 and be set in the metal coating sleeve 5 of guide pipe 13 outside in plastics; the elastoplasticity compressible material 6 that I, II, III level load are different is filled with between guide pipe 13 and metal coating sleeve 5 successively in plastics; the front end of described metal coating sleeve 5 is provided with fixing termination 11, and the rear end of metal coating sleeve 5 is provided with cover plate 12 and metal caul 10.Described elastoplasticity compressible material 6 by the metal of different size by pressure pipe be located at metal and form by the resin in pressure pipe.
The metal coating sleeve 5 of the utility model embedded classification constant-resistance shearing resistance large deformation anchor device is circular tube structure, steel strand anchor cable body 4 is through metal coating sleeve 5 and guide pipe 13 in plastics, elastoplasticity compressible material 6 allows pressure be arranged on guide pipe 13 periphery in plastics by three grades to distribute in order, in plastics, guide pipe 13 is fixed on metal coating sleeve 5 by fixing termination 11, cover plate 12 is adopted to be exposed from aperture to prevent the extruding of elastoplasticity compressible material 6 by guide pipe in plastics 13 port closed, by plastic spacer 9, metal caul 10 and aperture anchor cable lock 7 are fixed this device and are applied pretightning force, metal caul 8 is fixed on metal coating sleeve 5 end.
Operating principle: steel strand anchor cable body is installed in metal coating sleeve and plastics in guide pipe, dissimilar elastoplasticity compressible material is disposed in order successively between guide pipe and metal coating sleeve in plastics; Aperture lockset can form compression slip effect by the connection stretching action of steel strand anchor cable body in metal sleeve, and forms squeezing action by spring shim, rigid gasket and aperture cover plate to elastoplasticity compressible material.When the elastic limit of axial tension stress in anchor cable body lower than elastoplasticity compressible material, integral fastening structure only produces elastic deformation; After axial tension reaches the elastic limit of elastoplasticity compressible material, this material can produce larger plastic compression deformation, like this when axial tension does not improve, can produce moderate finite deformation, can the needs of suitable for surrounding rock large deformation, thus make anchor structure realize entirety to allow pressure effect.Owing to can produce axial tension effect to anchor cable body during surrouding rock deformation, when axial tension value is in the elastic carrier limit range of steel strand anchor cable body and elastoplasticity compressible material, anchor cable structure entirety is in elastic deformation; When axial tension is greater than the elastic carrier limit of elastoplasticity compressible material, and when being less than the yield strength of steel strand anchor cable body, elastoplasticity compressible material can continue to produce plastic compression deformation, with the needs of suitable for surrounding rock large deformation and anchor cable height tensile stress; Simultaneously, can according to surrouding rock deformation under different conditions and carrying need carry out classification and allow and press and (I grade, II grade, III grade etc. three grades can be divided into allow pressure load, generally get 60%, 75% and 90% of anchorage cable design anchoring force value), with the needs of suitable for surrounding rock different phase large deformation, and can monitor and grading forewarning system systematic unity with anchor cable loaded state; Produce at elastoplasticity compressible material in the process of plastic flow deformation, the working resistance that steel strand anchor cable physical efficiency keeps classification constant, be in elastic stage, namely achieve the object of anchor cable classification constant resistance and large deformation.And the resinae compressible material being in ideal plasticity state can extrude plastic flow deformation from the hoop gap between sleeve bottom and anchor cable body to being formed in holing, to displace moderate finite deformation space, ensure the needs of anchor device and the overall large deformation of country rock.When axial tension stress is more than the final elastic carrier limit of three grades of elastoplasticity compressible materials, and plastic strain tends towards stability after value, the needs being met the distortion of country rock later stage by the elastic deformability of anchor cable body self will be continued, until axial tension stress exceedes anchor cable body ultimate strength, cause anchor cable body structure to occur to play brittle fracture and destroy.In addition; slip between broken surrounding rock within the scope of the place 0 ~ 1.5m of anchor cable aperture and broken distortion of rising can produce larger lateral shear effect to anchor cable body; anchor cable body generation shear failure can be caused; anchor cable body is placed in metal coating tube-in-tube structure by this device; the transverse shear stresses that country rock produces will bear primarily of protection sleeve structure; therefore, good protective effect is served to anchor cable body, effectively can improve the ability that anchor cable structure totally resists shear failure.Moreover, this structure be all placed in country rock and boring in, can not cause anchor structure country rock surface exposed long and impact excavation space instructions for use, constitute closed embedded anchor structure.
The above is only preferred embodiment of the present utility model.It should be pointed out that for the technology in this area and constructor, not departing under the utility model know-why prerequisite, can also make some improvement or replacement, these improve or replace and also should be considered as protection domain of the present utility model.

Claims (2)

1. an embedded classification constant-resistance shearing resistance large deformation anchor device, comprise the aperture anchor cable lock (7) being positioned at steel strand anchor cable body (4) revealed section, it is characterized in that: also comprise be located at anchor cable hole (2) aperture section plastics in guide pipe (13) and be set in the outside metal coating sleeve (5) of guide pipe in plastics (13), I is filled with successively between guide pipe (13) and metal coating sleeve (5) in plastics, II, the elastoplasticity compressible material (6) that III level yield load is different, the front end of described metal coating sleeve (5) is provided with fixing termination (11), the rear end of metal coating sleeve (5) is provided with cover plate (12) and metal caul (10).
2. embedded classification constant-resistance shearing resistance large deformation anchor device according to claim 1, is characterized in that: described elastoplasticity compressible material (6) by the metal of different size by pressure pipe be located at metal and form by the resin in pressure pipe.
CN201420654400.XU 2014-11-04 2014-11-04 Embedded classification constant-resistance shearing resistance large deformation anchor device CN204267064U (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104373145A (en) * 2014-11-04 2015-02-25 中国矿业大学 Anchor device with functions of embedding, constant-resistance classifying, shear resisting and large deforming and method
CN104846822A (en) * 2015-05-07 2015-08-19 重庆交通大学 Yielding anchor cable
CN105696594A (en) * 2016-03-14 2016-06-22 中交第四航务工程勘察设计院有限公司 Retardation type buckling prevention anti-floating anchor and construction method thereof
CN106320163A (en) * 2016-08-31 2017-01-11 中国路桥工程有限责任公司 Elastic-plastic damping cable for transverse damping of large-span bridge
CN110284915A (en) * 2019-06-28 2019-09-27 江苏科技大学 A kind of imitative root-type anchor pole and its installation method
CN111425231A (en) * 2020-03-31 2020-07-17 中国矿业大学 Long and short anchor cable coordinated energy absorption yielding device and construction method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104373145A (en) * 2014-11-04 2015-02-25 中国矿业大学 Anchor device with functions of embedding, constant-resistance classifying, shear resisting and large deforming and method
CN104373145B (en) * 2014-11-04 2016-08-17 中国矿业大学 Embedded classification constant-resistance shearing resistance large deformation anchor and method
CN104846822A (en) * 2015-05-07 2015-08-19 重庆交通大学 Yielding anchor cable
CN105696594A (en) * 2016-03-14 2016-06-22 中交第四航务工程勘察设计院有限公司 Retardation type buckling prevention anti-floating anchor and construction method thereof
CN106320163A (en) * 2016-08-31 2017-01-11 中国路桥工程有限责任公司 Elastic-plastic damping cable for transverse damping of large-span bridge
CN106320163B (en) * 2016-08-31 2017-12-05 中国路桥工程有限责任公司 A kind of elastoplasticity damping rope for Longspan Bridge horizontal shock-absorbing
CN110284915A (en) * 2019-06-28 2019-09-27 江苏科技大学 A kind of imitative root-type anchor pole and its installation method
CN111425231A (en) * 2020-03-31 2020-07-17 中国矿业大学 Long and short anchor cable coordinated energy absorption yielding device and construction method
CN111425231B (en) * 2020-03-31 2021-03-26 中国矿业大学 Long and short anchor cable coordinated energy absorption yielding device and construction method

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