CN104213509A - Cable rope hoisting anchor rope type anchorage construction method - Google Patents
Cable rope hoisting anchor rope type anchorage construction method Download PDFInfo
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- CN104213509A CN104213509A CN201410501309.9A CN201410501309A CN104213509A CN 104213509 A CN104213509 A CN 104213509A CN 201410501309 A CN201410501309 A CN 201410501309A CN 104213509 A CN104213509 A CN 104213509A
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Abstract
The invention discloses a cable rope hoisting anchor rope type anchorage construction method. According to the method, in a determined anchorage region, surface soil is firstly dug for exposing out a fresh rock stratum surface, the rock stratum surface is chiseled into a vertical surface with the height being not smaller than 2m and is cleanly flushed, and then, a rectangular anchorage body with the intensity meeting the requirements is cast in a way of tightly pasting the rock stratum surface; next, holes are drilled in the anchorage body and a rock body; after hole cleaning, an anchor rope is put into each anchor hole, and grouting in the holes is carried out in time; when cast mortar intensity reaches a designed value, the anchor ropes are pre-tensioned; after the anchor ropes are pre-tensioned, the front side of the anchorage body is provided with a distribution anchor beam through the exposed anchor ropes, a pulley seat is fixedly arranged on the distribution anchor beam through a seat pull plate, and then, a main rope, a buckle rope and a work rope are arranged through the pulley seat; after a cable rope system is arranged in place, hoisting can be carried out. The cable rope hoisting anchor rope type anchorage construction method has the advantages that the hoisting construction process can be greatly simplified, the construction safety is better guaranteed, and the work period and the cost are reduced.
Description
Technical field
The present invention relates to the technological improvement of arch bridge construction prestressed cable, specifically refer to a kind of cable hoisting anchor cable formula anchorage construction method, belong to technical field of bridge construction.
Background technology
Construction prestressed cable technology is extensive use in bridge engineering, and the anchorage structure of wherein using prestressed anchor Cable Structure to apply to large-scale hoisting facilities as the successful engineering experience proof of the anchor cable formula anchorage of cable crane prestress anchorage cable technology is safe and reliable.Yet this technology is subject to topographic and geologic condition restriction when practical application, anchorage position buried depth of bedrock should not adopt when darker.Different base rock condition, need on-the-spot anchored force experimental data, need the series of factors requirement such as construct of special facility, select anchor cable formula Bower Anchor heavy stone used as an anchor to need as the case may be specifically research.Pylon is the important force structure part of funicular system normally, and withholds the cable crane pylon structure of one and stressed more complicated, and in construction, security risk is very large, needs Specialty Design.
It is particularly under river valley, valley orographic condition, to build in mountain area that bridge has quite a few.May there be the highway that needs connection bridge two sides, also may directly connect tunnel.If there is highway to exist, when construction prestressed cable, arrange that routinely hoisting tower not only will tie up the driving width of existing highway, also will greatly reduce construction operation space simultaneously, during lifting, will have a strong impact on social vehicular traffic safety.And select the structural forms such as conventional gravity or ground ridge formula Bower Anchor heavy stone used as an anchor, rock excavation engineering quantity is large, during construction, must interrupt road.
Summary of the invention
For prior art above shortcomings, the object of this invention is to provide a kind of cable hoisting anchor cable formula anchorage construction method, this method designs for V-arrangement valley river valley landform specially, can greatly simplify lifting construction process, better ensure construction safety, save duration and cost.
Technical scheme of the present invention is achieved in that
Cable hoisting anchor cable formula anchorage construction method, this method is applicable to build arch bridge between V-arrangement valley, and valley angle is less than 90 degree; Concrete steps are as follows:
1) anchorage location positioning: determine respectively anchorage construction position on every group of arch rib two sides massif, anchorage comprises for installing the cable two ends that lifts main rope, anchorage height guarantee main rope lift arch rib to rope during across span centre main rope minimum point be positioned on vault;
2) anchor body concrete construction: in definite anchorage region, first excavation table soil exposes fresh rock stratum face, rock stratum face is cut a hole into and is highly not less than the vertical plane of 2m and rinses well, then be close to the rectangle anchor body that rock stratum face placing intensity meets the demands, the arch rib center corresponding with it, anchor body center over against;
3) boring, clear hole: anchor body maintenance reaches after design strength, outside anchor body concrete, oblique lower 3-8 ° (preferably 5 °) even some anchor holes of ground auger are to projected depth, after pore-forming, repeatedly use high pressure wind hole, clean residue and water body on hole wall, to strengthen the cementitiousness of rock mass;
4) anchor cable is installed: behind the clear hole of anchor hole, put into anchor cable immediately in each anchor hole, carry out in time slip casting in hole, anchor cable and anchor hole are fixed as one; Anchor cable exposes certain length, for subsequent allocations anchor beam, installs;
5) cast mortar strength reaches design load 100% when above, and it is pre-tensioner that beginning is able to anchor cable by cable stretching anchor cable; After anchor cable pretension, in anchor body front, by the anchor cable exposing, install and distribute anchor beam, distribute on anchor beam and by seat arm-tie, fixedly mount pulley base again, described pulley base consists of main rope pulley base, knotted rope pulley base and working cable pulley base, and main rope pulley base is positioned at and distributes anchor beam center; Knotted rope pulley base has two groups to be symmetrically set in main rope pulley base both sides and to be positioned at distribution anchor beam two ends, and working cable pulley base is between main rope pulley base and inner side knotted rope pulley base;
6) installation of funicular system: by corresponding pulley base, main rope, knotted rope and working cable are installed respectively on the anchor body of every group of arch rib two sides;
7) lifting of arch rib: after funicular system is in place, arch rib section to be lifted can be suspended on main rope by hoist cable, then draws to installation site; Wherein knotted rope is for drawing the arch rib being in place to hang.
Further, described anchor hole is formed by the anchor hole on anchor body and the anchor hole two parts on rock mass, and wherein the hole depth on rock mass is not less than 20 meters; Near being set with steel pipe on the anchor cable on top layer, form free segment, steel pipe length is greater than anchor body thickness, and free segment is not poured into a mould; All the other anchor cables form anchoring section, and cast is only carried out on anchoring section.
Anchor cable in each anchor hole is formed by 6～10 low loose steel strand establishments of 15.24mm high strength.
Further, anchoring section forms corrugated by expansion locating ring and the colligation of contraction locating ring, and wavelength is got 1m; When anchorage cable stretching, adopt each root steel strand of corrugated form to stretch trend, to the extruding of slurry generation around, can produce the very favorable friction effect of anchorage cable anchoring.
The described the 4th) at the bottom of the slip casting of step anchor hole adopts a hole, method is constructed, and slurries are M40 cement paste, adopt ordinary Portland cement slurrying, water/binder ratio 0.38-0.4, and expansion agent 10%, injection pressure is 0.4Mpa～0.6Mpa.
Bridge superstructure installation of the present invention is according to the precipitous landform in two sides, V-arrangement valley, good geological conditions, the complete favorable factors such as massif structure, cable is anchored in to the suitable elevation position that is equivalent to existing pylon cable saddle on the massif of two sides, adopt prestressed cable anchorage Bower Anchor heavy stone used as an anchor and distribute anchor beam, on distribution anchor beam, the structures such as pulley base are set again and can hang cable system.Owing to taking, without tower design and the cable-styled Bower Anchor heavy stone used as an anchor of prestressing force technology, lifting construction process greatly to be simplified, button is hung rear registration, can better ensure construction safety, saves duration and cost.Adopt anchor cable formula Bower Anchor heavy stone used as an anchor open excavation amount little, to the current minimum of disturbing of highway.
Accompanying drawing explanation
Fig. 1-CABLEWAY ERECTION SYSTEM general arrangement of the present invention.
Fig. 2-CABLEWAY ERECTION SYSTEM general arrangement top view of the present invention.
Fig. 3-CABLEWAY ERECTION SYSTEM anchor structure figure of the present invention.
Fig. 4-CABLEWAY ERECTION SYSTEM anchor structure end view drawing of the present invention.
Fig. 5-prestress anchorage cable constructional drawing of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Cable hoisting anchor cable formula anchorage construction method of the present invention is applicable to build arch bridge under V-arrangement valley, river valley topographic and geologic condition, and valley angle is less than 90 degree; During construction, both can adopt tower construction method, also can adopt without tower construction method, as follows without the tower concrete implementation step of constructing:
1) anchorage location positioning: determine respectively anchorage construction position on every group of arch rib two sides massif 1, anchorage comprises for installing the cable two ends that lifts main rope, anchorage height guarantee main rope lift arch rib to rope during across span centre main rope minimum point be positioned on vault; Different according to bridge deck width, arch rib quantity is also different, is generally 2-3 group.Suppose that arch rib is N, will arrange respectively N anchorage on the massif of two sides so.During anchorage location positioning, except height and position, left and right, also need to consider the strata structure of this position etc., to guarantee that rock mass can bear the pulling force of Lift-on/Lift-off System.Guaranteeing that under the prerequisite of structural strength, position can suitably be moved.
2) anchor body concrete construction: in definite anchorage region, first excavation table soil exposes fresh rock stratum face, rock stratum face is cut a hole into and is highly not less than the vertical plane 2 of 2m and rinses well, then be close to the rectangle anchor body 3 that rock stratum face placing intensity meets the demands, the arch rib center corresponding with it, anchor body 3 centers over against; Note the accurate pre-buried and location of steel mesh reinforcement and noose pipe under anchor simultaneously;
In embodiment, anchor body is the C30 concrete of high 2m, thick 1m, long 6 m.
3) boring, clear hole: anchor body 3 maintenances reach after design strength, outside anchor body concrete, oblique lower 3-8 ° (preferably 5 °) even some anchor holes of ground auger are to projected depth.After pore-forming, repeatedly use high pressure wind hole, clean residue and water body on hole wall, to strengthen the cementitiousness of rock mass.
Anchor hole on anchor body, also comprise the anchor hole on rock mass, wherein the hole depth on rock mass is not less than 20 meters, and the degree of depth that anchor cable anchors in basement rock is greater than 20 meters, to guarantee weak weathered stratum in effective anchored end embedding, guaranteed strength.
Anchor hole size should be considered anchor cable diameter, considers again grouting amount, and actual diameter 90mm adopts the pneumatic construction of hidden hole drilling dry drill method.
4) anchor cable is installed: behind the clear hole of anchor hole, put into immediately anchor cable 4 in each anchor hole, carry out in time slip casting in hole, anchor cable and anchor hole are fixed as one; Anchor cable 4 exposes certain length, for subsequent allocations anchor beam, installs.
At the bottom of anchor hole slip casting adopts a hole, method is constructed, and slurries are M40 cement paste, adopt ordinary Portland cement slurrying, water/binder ratio 0.38-0.4, and expansion agent 10%, injection pressure is 0.4Mpa～0.6Mpa.
Anchor cable in each anchor hole is formed by 6～10 low loose steel strand establishments of 15.24mm high strength.Before anchor cable establishment,, to every steel strand close inspection, must not use dog leg, mechanical damage and serious corrosion, electric burn etc. to cause the material of strength decreased.
5) cast mortar strength reaches design load 100% when above, and it is pre-tensioner that beginning is able to anchor cable by cable stretching anchor cable.Stretch-draw capital equipment is YC250 punching jack, uses front through there being the unit of qualification to demarcate.In actual design, tension of prestressed tendon design strength is σ
con=0.43%f
ptk=800Mpa, the anchorage cable design stretching force of anchor body both sides is 67.2T, middle part anchorage cable design stretching force is 112 tons.Stressing sequence is: 0 → initial stress → σ
conhold lotus 5min anchoring.
Ground tackle destroys and just means failure of cable, is related to the safety of engineering, tackles ground tackle safekeeping during use, for preventing that anchored end intermediate plate from getting loose, takes to use pressing plate to be close to the safeguard measures such as intermediate plate before work anchor slab.
After anchor cable 4 pretensions, in anchor body 3 fronts, by the anchor cable that exposes, install and distribute anchor beam 5, distribute on anchor beam 5 again by a seat arm-tie fixed installation pulley base 6, between seat arm-tie and distribution anchor beam, adopt high-strength bolt to be connected.Described pulley base consists of main rope pulley base, knotted rope pulley base and working cable pulley base, and main rope pulley base is positioned at and distributes anchor beam center; Knotted rope pulley base has two groups to be symmetrically set in main rope pulley base both sides and to be positioned at distribution anchor beam two ends, and working cable pulley base is between main rope pulley base and inner side knotted rope pulley base.
The present invention is with the anchorage separate design of bank, and each anchorage design 2 * 3 rope steel hinge line anchor cable fixes shaped steel and distributes anchor beam, and wherein middle 2 * 1 anchor cables are 10 φ 15.24 ㎜ steel hinge lines, and it is 6 φ 15.24 ㎜ steel hinge lines that both sides are respectively 2 * 1 anchor cables; Anchor cable adopts standard tensile strength Ryb=1860Mpa, Ey=1.95 * 10
5mpa, relaxation rate meet the high strength low relaxed steel strand of φ 15.24 ㎜ that II level requires.
Fig. 3 and Fig. 4 are CABLEWAY ERECTION SYSTEM anchor structure figure of the present invention.
6) installation of funicular system: by corresponding pulley base, main rope 7, knotted rope 8 and working cable 9, the whole cableway system of anchoring are installed respectively on the anchor body of every group of arch rib two sides.
Hoisting with Cableway System will carry out every group of cable crane examination and hang after making and installing, examination is hung and adopted reinforcing bar counterweight, and 120% tonnage that lifts weight with maximum tries to hang (22.6 tons of sections gross weights as maximum in arch rib, trying so lift heavy amount is exactly 27 tons).In whole hoisting process, anchorage and each system unit of cable are checked, the parts of not normal operation are debugged, guarantee normally operation during lifting.
7) lifting of arch rib: after funicular system is in place, arch rib section to be lifted can be suspended on main rope by hoist cable, then draws to installation site; Wherein knotted rope is for drawing the arch rib being in place to hang.
On the anchor cable 4 of the present invention near top layer, be set with steel pipe 10 and form free segment, steel pipe length is greater than anchor body thickness, and free segment is not poured into a mould; All the other anchor cables form anchoring section, and cast is only carried out on anchoring section.While anchoring section forms corrugated by expansion locating ring 11 and 12 colligations of contraction locating ring, wavelength is got 1m.When anchorage cable stretching, adopt each root steel strand of corrugated form to stretch trend, to the extruding of slurry generation around, can produce the very favorable friction effect of anchorage cable anchoring.Fig. 5 is prestress anchorage cable constructional drawing.
The present invention, through adjustment to funicular system general arrangement, increases suspension cable span, and hoisting depth, takes after former cable saddle's position directly anchorage style, by anchorage by prestressed cable anchorage in basement rock, formed without tower anchor cable formula CABLEWAY ERECTION SYSTEM.Fig. 1 and Fig. 2 are cable hoisting anchor cable formula anchorage system general arrangement of the present invention.
Anchor cable formula Bower Anchor heavy stone used as an anchor stressing conditions more complicated, bears dead load with conventional rock bolting rope and compares, and has dynamic loading in anchor head place, therefore needs enough safety stocks, guarantees anchoring safety.When design distributes the position of anchor beam seat of honour arm-tie and anchoring pulley, notice that load direction and anchor cable axis that cable crane transmission is come are consistent as far as possible, distribute anchor beam and anchor body concrete structure to want effective Transfer of Shear, guarantee anchor cable axis tension.
The present invention lifts and stressedly by anchorage (size, structure), anchor cable (length, thickness, structure), cable etc., guarantees, requires rock anchor system in use can not occur loosening and distortion.During practical operation, after determining, each key element to carry out the calculating of anchor cable maximum pull and the checking computations of anchor cable safety factor.The present invention in use, cable crane is working properly, main rope sag and design calculation result are substantially identical, in use there is not loosening and distortion in rock anchor system, show that cable crane anchor cable formula Bower Anchor heavy stone used as an anchor mentality of designing of the present invention and computational methods have stood the check of practice, for arch bridge smooth construction provides guarantee.
Finally it should be noted that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although applicant has been described in detail the present invention with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is modified or is equal to replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of claim scope of the present invention.
Claims (5)
1. cable hoisting anchor cable formula anchorage construction method, is characterized in that: this method is applicable to build arch bridge between V-arrangement valley, and valley angle is less than 90 degree; Concrete steps are as follows:
1) anchorage location positioning: determine respectively anchorage construction position on every group of arch rib two sides massif, anchorage comprises for installing the cable two ends that lifts main rope, anchorage height guarantee main rope lift arch rib to rope during across span centre main rope minimum point be positioned on vault;
2) anchor body concrete construction: in definite anchorage region, first excavation table soil exposes fresh rock stratum face, rock stratum face is cut a hole into and is highly not less than the vertical plane of 2m and rinses well, then be close to the rectangle anchor body that rock stratum face placing intensity meets the demands, the arch rib center corresponding with it, anchor body center over against;
3) boring, clear hole: anchor body maintenance reaches after design strength, and outside anchor body concrete, the oblique lower 3-8 ° of some anchor holes of even ground auger, to projected depth, are used high pressure wind hole repeatedly after pore-forming, cleans residue and water body on hole wall, to strengthen the cementitiousness of rock mass;
4) anchor cable is installed: behind the clear hole of anchor hole, put into anchor cable immediately in each anchor hole, carry out in time slip casting in hole, anchor cable and anchor hole are fixed as one; Anchor cable exposes certain length, for subsequent allocations anchor beam, installs;
5) cast mortar strength reaches design load 100% when above, and it is pre-tensioner that beginning is able to anchor cable by cable stretching anchor cable; After anchor cable pretension, in anchor body front, by the anchor cable exposing, install and distribute anchor beam, distribute on anchor beam and by seat arm-tie, fixedly mount pulley base again, described pulley base consists of main rope pulley base, knotted rope pulley base and working cable pulley base, and main rope pulley base is positioned at and distributes anchor beam center; Knotted rope pulley base has two groups to be symmetrically set in main rope pulley base both sides and to be positioned at distribution anchor beam two ends, and working cable pulley base is between main rope pulley base and inner side knotted rope pulley base;
6) installation of funicular system: by corresponding pulley base, main rope, knotted rope and working cable are installed respectively on the anchor body of every group of arch rib two sides;
7) lifting of arch rib: after funicular system is in place, arch rib section to be lifted can be suspended on main rope by hoist cable, then draws to installation site; Wherein knotted rope is for drawing the arch rib being in place to hang.
2. cable hoisting anchor cable formula anchorage construction method according to claim 1, is characterized in that, described anchor hole is formed by the anchor hole on anchor body and the anchor hole two parts on rock mass, and wherein the hole depth on rock mass is not less than 20 meters; Near being set with steel pipe on the anchor cable on top layer, form free segment, steel pipe length is greater than anchor body thickness, and free segment is not poured into a mould; All the other anchor cables form anchoring section, and cast is only carried out on anchoring section.
3. cable hoisting anchor cable formula anchorage construction method according to claim 2, is characterized in that, the anchor cable in each anchor hole is formed by 6～10 low loose steel strand establishments of 15.24mm high strength.
4. cable hoisting anchor cable formula anchorage construction method according to claim 3, is characterized in that, anchoring section forms corrugated by expansion locating ring and the colligation of contraction locating ring, and wavelength is got 1m; When anchorage cable stretching, adopt each root steel strand of corrugated form to stretch trend, to the extruding of slurry generation around, can produce the very favorable friction effect of anchorage cable anchoring.
5. cable hoisting anchor cable formula anchorage construction method according to claim 1, it is characterized in that, the described the 4th) at the bottom of the slip casting of step anchor hole adopts a hole, method is constructed, slurries are M40 cement paste, adopt ordinary Portland cement slurrying, water/binder ratio 0.38-0.4, expansion agent 10%, injection pressure is 0.4Mpa～0.6Mpa.
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Cited By (9)
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| CN106284083A (en) * | 2016-08-15 | 2017-01-04 | 云南云岭桥隧科技有限公司 | Pushing tow climbs shifting formula cable crane arch bridge hanging method |
| CN106638326A (en) * | 2017-01-19 | 2017-05-10 | 中铁十六局集团第二工程有限公司 | Construction system for hoisting cable tower-free bridge cable and construction method |
| CN108153972A (en) * | 2017-12-22 | 2018-06-12 | 腾达建设集团股份有限公司 | A kind of cable hoisting full-range analysis methods |
| CN108755446A (en) * | 2018-06-14 | 2018-11-06 | 中国葛洲坝集团第五工程有限公司 | A kind of construction system and construction method of no buttress suspension pouring arch-type bridge |
| CN109853394A (en) * | 2019-03-25 | 2019-06-07 | 安徽省路港工程有限责任公司 | Arch bridge cable hoisting tower button integrated construction engineering method |
| CN110439005A (en) * | 2019-06-24 | 2019-11-12 | 中国地质大学（武汉） | One kind being used for interbedding of soft and hard rocks rock mass stream line structure and its construction method |
| CN114016374A (en) * | 2021-12-16 | 2022-02-08 | 江苏交通工程咨询监理有限公司 | Cliff steep wall hanging net type pedestrian suspension bridge of canyon river and construction method thereof |
| CN115419104A (en) * | 2022-09-25 | 2022-12-02 | 贵州路桥集团有限公司 | Cable crane combined type anchorage structure and using method thereof |
| CN116657506A (en) * | 2023-07-27 | 2023-08-29 | 中国建筑第六工程局有限公司 | Method for arranging cable crane gravity anchors of highway and rail dual-purpose suspension bridge in deep soil layer |
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| CN106284083A (en) * | 2016-08-15 | 2017-01-04 | 云南云岭桥隧科技有限公司 | Pushing tow climbs shifting formula cable crane arch bridge hanging method |
| CN106638326A (en) * | 2017-01-19 | 2017-05-10 | 中铁十六局集团第二工程有限公司 | Construction system for hoisting cable tower-free bridge cable and construction method |
| CN108153972A (en) * | 2017-12-22 | 2018-06-12 | 腾达建设集团股份有限公司 | A kind of cable hoisting full-range analysis methods |
| CN108755446A (en) * | 2018-06-14 | 2018-11-06 | 中国葛洲坝集团第五工程有限公司 | A kind of construction system and construction method of no buttress suspension pouring arch-type bridge |
| CN109853394A (en) * | 2019-03-25 | 2019-06-07 | 安徽省路港工程有限责任公司 | Arch bridge cable hoisting tower button integrated construction engineering method |
| CN110439005A (en) * | 2019-06-24 | 2019-11-12 | 中国地质大学（武汉） | One kind being used for interbedding of soft and hard rocks rock mass stream line structure and its construction method |
| CN110439005B (en) * | 2019-06-24 | 2020-05-01 | 中国地质大学（武汉） | Anchor cable structure used in soft and hard interbedded rock mass and construction method thereof |
| CN114016374A (en) * | 2021-12-16 | 2022-02-08 | 江苏交通工程咨询监理有限公司 | Cliff steep wall hanging net type pedestrian suspension bridge of canyon river and construction method thereof |
| CN115419104A (en) * | 2022-09-25 | 2022-12-02 | 贵州路桥集团有限公司 | Cable crane combined type anchorage structure and using method thereof |
| CN116657506A (en) * | 2023-07-27 | 2023-08-29 | 中国建筑第六工程局有限公司 | Method for arranging cable crane gravity anchors of highway and rail dual-purpose suspension bridge in deep soil layer |
| CN116657506B (en) * | 2023-07-27 | 2023-11-14 | 中国建筑第六工程局有限公司 | Method for arranging cable crane gravity anchors of highway and rail dual-purpose suspension bridge in deep soil layer |
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