CN104234052A - Rock reaming self-locking anchor cable comprising steel strands and manufacturing method of rock reaming self-locking anchor cable - Google Patents
Rock reaming self-locking anchor cable comprising steel strands and manufacturing method of rock reaming self-locking anchor cable Download PDFInfo
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- CN104234052A CN104234052A CN201410446446.7A CN201410446446A CN104234052A CN 104234052 A CN104234052 A CN 104234052A CN 201410446446 A CN201410446446 A CN 201410446446A CN 104234052 A CN104234052 A CN 104234052A
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Abstract
The invention relates to a rock reaming self-locking anchor cable comprising steel strands. The rock reaming self-locking anchor cable comprising the steel strands comprises an outer hole, and an anchor cable, a locking head and a split circular pipe which are arranged in the outer hole, wherein the anchor cable is formed by a plurality of steel strands; the steel strands sequentially penetrate through inserting holes in the top part and the bottom part of the locking head, and then clamping pieces are installed for fixing; the top end of the lamelliform part in the split circular pipe is arranged higher than the top part of the locking head; the bottom end of the lamelliform part in the split circular pipe is arranged between the top part and the bottom part of the locking head, and is connected with a hole wall of a bottom reamed hole formed in the bottom part of the outer hole. During manufacturing, the outer hole is firstly formed; the steel strands and the locking head are then assembled and arranged in the outer hole; a pressurization sleeve pipe sleeves the steel strands so as to downwards press the split circular pipe until the front end of the scattered lamelliform part is connected with the hole wall of the bottom reamed hole and an effect of mechanical anchoring is realized; the pressurization sleeve pipe is taken away, and grouting and solidifying are carried out sequentially. The design not only has the chemical grouting anchoring force and mechanical anchoring force simultaneously, but also has strong aging resistance performance and fatigue resistance performance.
Description
Technical field
The present invention relates to ground anchorage field, particularly relate to a kind of rock reaming self-locking anchor cable comprising steel wire bundle and preparation method thereof, specifically be applicable to provide mechanical anchoring force on the basis of script chemical grouting anchored force, and strengthen anti-fatigue performance by steel wire bundle.
Background technology
Ground anchorage is the important branch in geotechnical engineering field, Anchorage Technology can fully call and improve self-strength and the self-stable ability of Rock And Soil, improve the stress state of Rock And Soil, greatly reduce the deadweight that structural objects sum alleviates works, save engineering material significantly, improve the safety of work progress.Anchorage Technology has become and has improved geotechnical engineering stability and solve one of most economical, most effective method of complicated geotechnical engineering stable problem, in China's side slope, tunnel, underground construction, mine, foundation ditch and anti-floating, the anti-engineering constructions such as structure of inclining, obtains extensive use.
Developing rapidly of ground anchorage is closely related with Anchorage Technology progress, in recent years, China's Anchorage Technology obtains and develops fast, particularly apply very wide in civilian construction basement anti-floating engineering, but the conventional common bolt adopted at present exists following defect:
Defect 1: the principle of conventional common bolt be by the cementation of potting compound ramming material to provide single anchored force, non-refractory, have particular/special requirement to ambient humidity, there is problem of aging.
Defect 2: the rod body material of conventional common bolt is generally fining twisted steel, bearing under dynamic load function for a long time, require that rod body material has good anti-fatigue performance, but current domestic fining twisted steel material is unstable, for once there is fatigue failure under the fluctuating load operating modes such as blower foundation, therefore be necessary to develop a kind of novel rod body material, not only have higher intensity also to have good anti-fatigue performance.
The adhesion stress that what the anchor pole adopted in prior art leaned on is between grouting material and the body of rod is to provide anchored force, pure frictional force, the defect of this kind of design is: first, adhesion stress between grouting material and the body of rod relies on the chemical action of grouting material, it is a kind of chemical force, and grouting material non-refractory, not moisture-proof, have particular/special requirement to ambient humidity, fairly aging, its anchored force reliability produced is not high; Secondly, only rely on the frictional force that combining power provides, just need longer grouting length, this can increase difficulty of construction and construction cost.
For overcoming above defect, the present invention has set up mechanical anchoring force on the basis of script chemical anchoring power, specific as follows:
Mechanical snap power: the flap portion of split-type pipe can be stuck in the position between tapered end (frustum type) top, bottom after scattering, the front end in the flap portion of scattering can be connected with the hole wall of reaming part to play the fixing effect of machinery;
Chemical grouting anchored force: the inorganic grouting material after solidifying and the adhesion stress between hole wall and the adhesion stress between grouting material and steel strand anchoring section.
Mechanical type anchoring is combined with adhered anchoring, relative to other anchoring existing, no longer rely on merely chemical anchoring power, therefore the advantages such as reliability is higher, anchorage depth is little, high temperature resistant, water-fast, ageing-resistant are possessed, particularly deep hole auto-lock anchorage technology (bottom reaming, split-type pipe, tapered end) can be applicable to prestressing force and non-prestressed anchoring, has wide range of applications.
Summary of the invention
The object of the invention is to overcome the anchored force existed in prior art is single, not ageing-resistant, anti-fatigue performance is more weak defect and problem, a kind of anchored force diversification, the rock reaming self-locking anchor cable comprising steel wire bundle that ageing-resistant, anti-fatigue performance is stronger and preparation method thereof are provided.
For realizing above object, technical solution of the present invention is: the rock reaming self-locking anchor cable comprising steel wire bundle, comprise exit orifice and inner anchor cable, the tapered end arranged thereof, described anchor cable comprises anchoring section and stretch-draw section, the top of anchoring section is connected with stretch-draw section, the bottom of anchoring section is connected with tapered end, and anchoring section is connected with the inwall of exit orifice by grouting material;
Described exit orifice comprises the upper straight hole and bottom reaming that connect successively from top to bottom, and upper straight hole is cylindrical structure, and bottom reaming is up-narrow and down-wide circular cone structure, and the cross section of upper straight hole is narrower than the cross section of bottom reaming;
Described anchor cable is made up of many steel wire bundles, and every root steel wire bundle is formed by many un-bonded prestressed steel strands system of twisting, and the steel strand that the steel strand in anchoring section are removed in anticorrosive coat, stretch-draw section retain anticorrosive coat;
Described tapered end is up-narrow and down-wide circular cone structure, the top of tapered end is provided with top grout hole and multiple top jack inserted for steel wire bundle, top grout hole is positioned at middle, multiple tops jack is uniformly distributed around top grout hole, the bottom of tapered end is provided with bottom grout hole and multiple bottom jack inserted for steel wire bundle, bottom grout hole is positioned at middle, multiple bottoms jack is uniformly distributed around bottom grout hole, top grout hole, bottom grout hole correspondence is arranged, top jack, bottom jack correspondence is arranged, and the diameter of bottom jack is greater than the diameter of top jack, on described steel wire bundle, between top jack, bottom jack, the outside portion at position is connected by the inner hole wall of intermediate plate with top jack, bottom jack, described intermediate plate is circular cone structure that is up-narrow and down-wide, hollow, and the diameter bottom intermediate plate is less than the diameter of bottom jack,
Described rock reaming self-locking anchor cable also comprises the split-type pipe being set in anchoring section outside, this split-type pipe comprises multiple flap portions of limiting section and bottom connection thereof from top to bottom, limiting section is cylinder mode, the diameter of limiting section is positioned at tapered end top, between the diameter of bottom, the inside of limiting section is run through and is provided with anchoring section, the bottom of limiting section is connected with the top in multiple flap portion, the top in flap portion is arranged higher than the top of tapered end, the bottom in flap portion is positioned at the top of tapered end, arrange between bottom, and the bottom in flap portion is connected with the hole wall of bottom reaming,
Described stretch-draw section is positioned at straight hole and arranges, and anchoring section is positioned at straight hole, bottom reaming is arranged, and tapered end, split-type pipe are positioned at bottom reaming and arrange.
The reaming of described bottom comprises interconnective middle taper hole, lower straight hole, and middle taper hole is up-narrow and down-wide circular cone structure, and the top of middle taper hole communicates with diameter with upper straight hole, and the bottom of middle taper hole communicates with diameter with lower straight hole.
Described grouting material is inorganic microdilatancy grouting material, and its 28d grade of compressive strength is more than or equal to M50.
The manufactured materials of described split-type pipe is Q235B steel sleeve.
The above-mentioned preparation method comprising the rock reaming self-locking anchor cable of steel wire bundle, described preparation method comprises the following steps successively:
The first step: first bore straight hole on rock, then expand to form bottom reaming to the bottom of this straight hole, can obtain exit orifice after expansion, this exit orifice from top to bottom comprise connect successively upper straight hole, bottom reaming;
Second step: first make many steel wire bundles, every root steel wire bundle is all formed by many un-bonded prestressed steel strands system of twisting, again steel wire bundle is passed successively top jack, the bottom jack on tapered end, when steel wire bundle penetrates bottom jack, insert with fixing steel wire bundle and tapered end by intermediate plate from bottom to top along bottom jack, after insertion, intermediate plate is stuck between the hole wall of steel wire bundle, bottom jack, now, steel wire bundle, tapered end assemble complete;
3rd step: first by steel wire bundle complete for above-mentioned assembling, tapered end puts into exit orifice in the lump, split-type pipe is inserted in again in the outside of anchoring section, split-type pipe now comprises multiple flap portions of limiting section and bottom connection thereof from top to bottom, the bottom in flap portion contacts with the top of tapered end, then be inserted in the outside of anchoring section and the outlet sleeve of split-type pipe with diameter, the bottom of this outlet sleeve contacts with the top of split-type pipe, give the power that outlet sleeve one is downward again, split-type pipe presses down by descending outlet sleeve, in the process that split-type pipe is pressed down, can scatter in flap portion, until be stuck in tapered end top, position between bottom, now, the front end in the flap portion of scattering is connected with the hole wall of bottom reaming to play the fixing effect of machinery, then outlet sleeve is taken away, grouting material is injected again from top grout hole, this grouting material experiences top grout hole successively, overflow into after the grout hole of bottom in the reaming of bottom, then by bottom reaming to vertical spread, when grouting material spreads to anchoring section, grouting is stopped during the line of demarcation of stretch-draw section, after solidifying Deng grouting material, the rock reaming self-locking anchor cable of steel wire bundle is comprised described in can obtaining.
In described second step, pass the top jack on tapered end, bottom jack at steel wire bundle before, first steel wire bundle is numbered.
Compared with prior art, beneficial effect of the present invention is:
1, equipment in rock reaming self-locking anchor cable that the present invention includes steel wire bundle and preparation method thereof comprises exit orifice and the inner anchor cable arranged thereof, the tapered end of circular cone structure, split-type pipe, wherein, exit orifice comprises the upper straight hole and bottom reaming that connect successively from top to bottom, the cross section of bottom reaming is wider than upper straight hole, the object of this design is not only and is spread space to provide to the grouting material that tapered end injects, more crucial is that providing mechanical to the flap portion on split-type pipe coordinates, guarantee that flap portion is stuck in after on tapered end pressing down, the bottom in the four flap portions of scattering can be fixing to realize machinery with the mutual clamping of the inner hole wall of bottom reaming, namely anchoring is realized with mechanical snap power, thus on the basis of the chemical grouting anchored force provided at script chemical grouting material, increase a kind of new anchored force, and then overcome the single defect of anchored force in prior art.Therefore, the present invention not only possesses chemical grouting anchored force, and possesses mechanical anchoring force, anchored force diversification.
2, by split-type pipe in rock reaming self-locking anchor cable that the present invention includes steel wire bundle and preparation method thereof, tapered end, bottom reaming produces mechanical snap power using as newly-increased anchored force, compared with chemical grouting anchored force, its advantage comprises: first, mechanical snap power is pure to be realized by frame for movement, chemical grouting non-refractory can be avoided, not moisture-proof, particular/special requirement is had to ambient humidity, easily aging defect, thus, even if when the situation of grouting material degradation failure occurs in the present invention, anchored force also can start going down, until anchor head is completely locked by machinery, strengthen mechanical snap-in force, make mechanical anchor more reliable, more permanent, be equivalent to form dual fail-safe, secondly, the adhesion stress that what traditional anchor pole leaned on is only between grouting material and anchor pole is to provide anchored force, what lean on is pure frictional force, therefore longer length is needed, and the present invention is the acting in conjunction of chemical anchoring power, mechanical anchoring force, thus greatly can reduce the length of chemical grouting section, Simplified flowsheet, reduces costs.Therefore, the present invention not only ageing-resistant, anchoring is more reliable, and technique is simpler, cost is lower.
3, the anchor cable in rock reaming self-locking anchor cable that the present invention includes steel wire bundle and preparation method thereof is made up of many steel wire bundles, every root steel wire bundle is formed by many un-bonded prestressed steel strands system of twisting, un-bonded prestressed steel strand not only intensity is high, and anti-fatigue performance is good, thus the anchor cable in the present invention can not only meet the requirement of high strength in Anchorage Technology, and possesses stronger anti-fatigue performance; In addition, the adhesion stress that in anchoring section, steel strand removal anticorrosive coat can be convenient between grouting material and steel strand works, and be convenient to strengthen chemical anchoring power, and stretch-draw section is just the opposite, needs to be free to slide, therefore the steel strand in stretch-draw section retains anticorrosive coat.Therefore, not only intensity is high in the present invention, anti-fatigue performance strong, and can strengthen chemical anchoring power.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of exit orifice in Fig. 1.
The assembling schematic diagram of Fig. 3 Fig. 1 stream line, tapered end.
Fig. 4 is the structural representation of tapered end in Fig. 3.
Fig. 5 is the operation chart of split-type pipe when being pressed down.
In figure: grouting material 1, exit orifice 2, upper straight hole 21, bottom reaming 22, middle taper hole 221, lower straight hole 222, tapered end 3, top grout hole 31, top jack 32, bottom grout hole 33, bottom jack 34, steel wire bundle 4, intermediate plate 5, split-type pipe 6, limiting section 61, flap portion 62, outlet sleeve 7, line of demarcation A.
Detailed description of the invention
Illustrate that the present invention is further detailed explanation with detailed description of the invention below in conjunction with accompanying drawing.
See figure 1 – Fig. 5, comprise the rock reaming self-locking anchor cable of steel wire bundle, comprise exit orifice 2 and inner anchor cable, the tapered end 3 arranged thereof, described anchor cable comprises anchoring section and stretch-draw section, the top of anchoring section is connected with stretch-draw section, the bottom of anchoring section is connected with tapered end 3, and anchoring section is connected by the inwall of grouting material 1 with exit orifice 2;
Described exit orifice 2 comprises the upper straight hole 21 and bottom reaming 22 that connect successively from top to bottom, and upper straight hole 21 is cylindrical structure, and bottom reaming 22 is up-narrow and down-wide circular cone structure, and the cross section of upper straight hole 21 is narrower than the cross section of bottom reaming 22;
Described anchor cable is made up of many steel wire bundles 4, and every root steel wire bundle 4 is formed by many un-bonded prestressed steel strands system of twisting, and the steel strand that the steel strand in anchoring section are removed in anticorrosive coat, stretch-draw section retain anticorrosive coat;
Described tapered end 3 is up-narrow and down-wide circular cone structures, the top of tapered end 3 is provided with top grout hole 31 and multiple top jack 32 inserted for steel wire bundle 4, top grout hole 31 is positioned at middle, multiple tops jack 32 is uniformly distributed around top grout hole 31, the bottom of tapered end 3 is provided with bottom grout hole 33 and multiple bottom jack 34 inserted for steel wire bundle 4, bottom grout hole 33 is positioned at middle, multiple bottoms jack 34 is uniformly distributed around bottom grout hole 33, top grout hole 31, bottom grout hole 33 correspondence is arranged, top jack 32, bottom jack 34 correspondence is arranged, and the diameter of bottom jack 34 is greater than the diameter of top jack 32, on described steel wire bundle 4, between top jack 32, bottom jack 34, the outside portion at position is connected by the inner hole wall of intermediate plate 5 with top jack 32, bottom jack 34, described intermediate plate 5 is circular cone structures that are up-narrow and down-wide, hollow, and the diameter bottom intermediate plate 5 is less than the diameter of bottom jack 34,
Described rock reaming self-locking anchor cable also comprises the split-type pipe 6 being set in anchoring section outside, this split-type pipe 6 comprises multiple flap portions 62 of limiting section 61 and bottom connection thereof from top to bottom, limiting section 61 is cylinder mode, the diameter of limiting section 61 is positioned at tapered end 3 top, between the diameter of bottom, the inside of limiting section 61 is run through and is provided with anchoring section, the bottom of limiting section 61 is connected with the top in multiple flap portion 62, the top in flap portion 62 is arranged higher than the top of tapered end 3, the bottom in flap portion 62 is positioned at the top of tapered end 3, arrange between bottom, and the bottom in flap portion 62 is connected with the hole wall of bottom reaming 22,
Described stretch-draw section is positioned at straight hole 21 and arranges, and anchoring section is positioned at straight hole 21, bottom reaming 22 is arranged, and tapered end 3, split-type pipe 6 are positioned at bottom reaming 22 and arrange.
Described bottom reaming 22 comprises interconnective middle taper hole 221, lower straight hole 222, and middle taper hole 221 is up-narrow and down-wide circular cone structure, and the top of middle taper hole 221 communicates with diameter with upper straight hole 21, and the bottom of middle taper hole 221 communicates with diameter with lower straight hole 222.
Described grouting material 1 is inorganic microdilatancy grouting material, and its 28d grade of compressive strength is more than or equal to M50.
The manufactured materials of described split-type pipe 6 is Q235B steel sleeve.
The above-mentioned preparation method comprising the rock reaming self-locking anchor cable of steel wire bundle, described preparation method comprises the following steps successively:
The first step: first bore straight hole on rock, then expand to form bottom reaming 22 to the bottom of this straight hole, can obtain exit orifice 2 after expansion, this exit orifice 2 from top to bottom comprise connect successively upper straight hole 21, bottom reaming 22;
Second step: first make many steel wire bundles 4, every root steel wire bundle 4 is all formed by many un-bonded prestressed steel strands system of twisting, again steel wire bundle 4 is passed successively top jack 32, the bottom jack 34 on tapered end 3, when steel wire bundle 4 penetrates bottom jack 34, inserted from bottom to top along bottom jack 34 with fixing steel wire bundle 4 and tapered end 3 by intermediate plate 5, after insertion, intermediate plate 5 is stuck between the hole wall of steel wire bundle 4, bottom jack 34, now, steel wire bundle 4, tapered end 3 assemble complete;
3rd step: first by steel wire bundle 4 complete for above-mentioned assembling, tapered end 3 puts into exit orifice 2 in the lump, split-type pipe 6 is inserted in again in the outside of anchoring section, split-type pipe 6 now comprises multiple flap portions 62 of limiting section 61 and bottom connection thereof from top to bottom, the bottom in flap portion 62 contacts with the top of tapered end 3, then be inserted in the outside of anchoring section and the outlet sleeve 7 of split-type pipe 6 with diameter, the bottom of this outlet sleeve 7 contacts with the top of split-type pipe 6, give the power that outlet sleeve 7 one is downward again, split-type pipe 6 presses down by descending outlet sleeve 7, in the process that split-type pipe 6 is pressed down, can scatter in flap portion 62, until be stuck in tapered end 3 top, position between bottom, now, the front end in the flap portion 62 of scattering is connected with the hole wall of bottom reaming 22 to play the fixing effect of machinery, then outlet sleeve 7 is taken away, grouting material 1 is injected again from top grout hole 31, this grouting material 1 experiences top grout hole 31 successively, overflow into after the grout hole 33 of bottom in the reaming 22 of bottom, then by bottom reaming 22 to vertical spread, when grouting material 1 spreads to anchoring section, grouting is stopped during the line of demarcation A of stretch-draw section, after solidifying Deng grouting material 1, the rock reaming self-locking anchor cable of steel wire bundle is comprised described in can obtaining.
In described second step, pass the top jack 32 on tapered end 3, bottom jack 34 at steel wire bundle 4 before, first steel wire bundle 4 is numbered.
Principle of the present invention is described as follows:
Embodiment 1:
See figure 1 – Fig. 5, comprise the rock reaming self-locking anchor cable of steel wire bundle, comprise exit orifice 2 and inner anchor cable, tapered end 3, the flap-type pipe 6 arranged thereof, described anchor cable comprises anchoring section and stretch-draw section, the top of anchoring section is connected with stretch-draw section, the bottom of anchoring section is connected with tapered end 3, and anchoring section is inorganic microdilatancy grouting material by grouting material 1(grouting material 1, and its 28d grade of compressive strength is more than or equal to M50) be connected with the inwall of exit orifice 2; Described anchor cable is made up of many steel wire bundles 4, and every root steel wire bundle 4 is formed by many un-bonded prestressed steel strands system of twisting, and the steel strand that the steel strand in anchoring section are removed in anticorrosive coat, stretch-draw section retain anticorrosive coat;
Described exit orifice 2 comprises the upper straight hole 21 and bottom reaming 22 that connect successively from top to bottom, and upper straight hole 21 is cylindrical structure, and bottom reaming 22 is up-narrow and down-wide circular cone structure, and the cross section of upper straight hole 21 is narrower than the cross section of bottom reaming 22;
Described tapered end 3 is up-narrow and down-wide circular cone structures, the top of tapered end 3 is provided with top grout hole 31 and multiple top jack 32 inserted for steel wire bundle 4, top grout hole 31 is positioned at middle, multiple tops jack 32 is uniformly distributed around top grout hole 31, the bottom of tapered end 3 is provided with bottom grout hole 33 and multiple bottom jack 34 inserted for steel wire bundle 4, bottom grout hole 33 is positioned at middle, multiple bottoms jack 34 is uniformly distributed around bottom grout hole 33, top grout hole 31, bottom grout hole 33 correspondence is arranged, top jack 32, bottom jack 34 correspondence is arranged, and the diameter of bottom jack 34 is greater than the diameter of top jack 32, on described steel wire bundle 4, between top jack 32, bottom jack 34, the outside portion at position is connected by the inner hole wall of intermediate plate 5 with top jack 32, bottom jack 34, described intermediate plate 5 is circular cone structures that are up-narrow and down-wide, hollow, and the diameter bottom intermediate plate 5 is less than the diameter of bottom jack 34,
The manufactured materials of described split-type pipe 6(split-type pipe 6 is Q235B steel sleeve, namely grooving process is carried out to obtain multiple flap portion 62 to the latter half of Q235B steel sleeve) comprise multiple flap portions 62 that limiting section 61 and bottom thereof connect from top to bottom, limiting section 61 is cylinder mode, the diameter of limiting section 61 is positioned at tapered end 3 top, between the diameter of bottom, the inside of limiting section 61 is run through and is provided with anchoring section, the bottom of limiting section 61 is connected with the top in multiple flap portion 62, the top in flap portion 62 is arranged higher than the top of tapered end 3, the bottom in flap portion 62 is positioned at the top of tapered end 3, arrange between bottom, and the bottom in flap portion 62 is connected with the hole wall of bottom reaming 22,
Described stretch-draw section is positioned at straight hole 21 and arranges, and anchoring section is positioned at straight hole 21, bottom reaming 22 is arranged, and tapered end 3, split-type pipe 6 are positioned at bottom reaming 22 and arrange.Wherein, bottom reaming 22 can be designed to interconnective middle taper hole 221, lower straight hole 222, middle taper hole 221 is up-narrow and down-wide circular cone structure, and the top of middle taper hole 221 communicates with diameter with upper straight hole 21, and the bottom of middle taper hole 221 communicates with diameter with lower straight hole 222.
The above-mentioned preparation method comprising the rock reaming self-locking anchor cable of steel wire bundle, described preparation method comprises the following steps successively:
The first step: see Fig. 2, first bores straight hole on rock, then expands to form bottom reaming 22 to the bottom of this straight hole, can obtain exit orifice 2 after expansion, this exit orifice 2 from top to bottom comprise connect successively upper straight hole 21, bottom reaming 22;
Second step: see Fig. 3, Fig. 4, first make many steel wire bundles 4, every root steel wire bundle 4 is all formed by many un-bonded prestressed steel strands system of twisting, again steel wire bundle 4 is passed successively top jack 32, the bottom jack 34 on tapered end 3, when steel wire bundle 4 penetrates bottom jack 34, intermediate plate 5 is inserted with fixing steel wire bundle 4 and tapered end 3 along bottom jack 34 from bottom to top, after insertion, intermediate plate 5 is stuck between the hole wall of steel wire bundle 4, bottom jack 34, now, steel wire bundle 4, tapered end 3 assemble complete; Pass the top jack 32 on tapered end 3, bottom jack 34 at steel wire bundle 4 before, can be numbered to accelerate assembling to steel wire bundle 4;
3rd step: see Fig. 5, first by steel wire bundle 4 complete for above-mentioned assembling, tapered end 3 puts into exit orifice 2 in the lump, split-type pipe 6 is inserted in again in the outside of anchoring section, split-type pipe 6 now comprises multiple flap portions 62 of limiting section 61 and bottom connection thereof from top to bottom, the bottom in flap portion 62 contacts with the top of tapered end 3, then be inserted in the outside of anchoring section and the outlet sleeve 7 of split-type pipe 6 with diameter, the bottom of this outlet sleeve 7 contacts with the top of split-type pipe 6, give the power that outlet sleeve 7 one is downward again, split-type pipe 6 presses down by descending outlet sleeve 7, in the process that split-type pipe 6 is pressed down, can scatter in flap portion 62, until be stuck in tapered end 3 top, position between bottom, now, the front end in the flap portion 62 of scattering is connected with the hole wall of bottom reaming 22 to play the fixing effect of machinery, then outlet sleeve 7 is taken away, grouting material 1 is injected again from top grout hole 31, this grouting material 1 experiences top grout hole 31 successively, overflow into after the grout hole 33 of bottom in the reaming 22 of bottom, then by bottom reaming 22 to vertical spread, when grouting material 1 spreads to anchoring section, grouting is stopped during the line of demarcation A of stretch-draw section, after solidifying Deng grouting material 1, rock reaming self-locking anchor cable (see Fig. 1) of steel wire bundle is comprised described in can obtaining.
Claims (6)
1. comprise the rock reaming self-locking anchor cable of steel wire bundle, comprise exit orifice (2) and inner anchor cable, the tapered end (3) arranged thereof, described anchor cable comprises anchoring section and stretch-draw section, the top of anchoring section is connected with stretch-draw section, the bottom of anchoring section is connected with tapered end (3), and anchoring section is connected by the inwall of grouting material (1) with exit orifice (2), it is characterized in that:
Described exit orifice (2) comprises the upper straight hole (21) and bottom reaming (22) that connect successively from top to bottom, upper straight hole (21) is cylindrical structure, bottom reaming (22) is up-narrow and down-wide circular cone structure, and the cross section of upper straight hole (21) is narrower than the cross section of bottom reaming (22);
Described anchor cable is made up of many steel wire bundles (4), and every root steel wire bundle (4) is formed by many un-bonded prestressed steel strands system of twisting, and the steel strand that the steel strand in anchoring section are removed in anticorrosive coat, stretch-draw section retain anticorrosive coat;
Described tapered end (3) is up-narrow and down-wide circular cone structure, the top of tapered end (3) is provided with top grout hole (31) and multiple top jack (32) inserted for steel wire bundle (4), top grout hole (31) is positioned at middle, multiple tops jack (32) are uniformly distributed around top grout hole (31), the bottom of tapered end (3) is provided with bottom grout hole (33) and multiple bottom jack (34) inserted for steel wire bundle (4), bottom grout hole (33) is positioned at middle, multiple bottoms jack (34) are uniformly distributed around bottom grout hole (33), top grout hole (31), bottom grout hole (33) correspondence is arranged, top jack (32), bottom jack (34) correspondence is arranged, and the diameter of bottom jack (34) is greater than the diameter of top jack (32), the outside portion described steel wire bundle (4) being positioned at position between top jack (32), bottom jack (34) is connected by the inner hole wall of intermediate plate (5) with top jack (32), bottom jack (34), described intermediate plate (5) is circular cone structure that is up-narrow and down-wide, hollow, and the diameter of intermediate plate (5) bottom is less than the diameter of bottom jack (34),
Described rock reaming self-locking anchor cable also comprises the split-type pipe (6) being set in anchoring section outside, this split-type pipe (6) comprises multiple flap portions (62) of limiting section (61) and bottom connection thereof from top to bottom, limiting section (61) is cylinder mode, the diameter of limiting section (61) is positioned at tapered end (3) top, between the diameter of bottom, the inside of limiting section (61) is run through and is provided with anchoring section, the bottom of limiting section (61) is connected with the top of multiple flap portion (62), the top in flap portion (62) is arranged higher than the top of tapered end (3), the bottom in flap portion (62) is positioned at the top of tapered end (3), arrange between bottom, and the bottom of flap portion (62) is connected with the hole wall of bottom reaming (22),
Described stretch-draw section is positioned at straight hole (21) and arranges, and anchoring section is positioned at straight hole (21), bottom reaming (22) is arranged, and tapered end (3), split-type pipe (6) are positioned at bottom reaming (22) and arrange.
2. the rock reaming self-locking anchor cable comprising steel wire bundle according to claim 1, it is characterized in that: described bottom reaming (22) comprises interconnective middle taper hole (221), lower straight hole (222), middle taper hole (221) is up-narrow and down-wide circular cone structure, the top of middle taper hole (221) communicates with diameter with upper straight hole (21), and the bottom of middle taper hole (221) communicates with diameter with lower straight hole (222).
3. the rock reaming self-locking anchor cable comprising steel wire bundle according to claim 1 and 2, is characterized in that: described grouting material (1) is more than or equal to M50 for inorganic microdilatancy grouting material, its 28d grade of compressive strength.
4. the rock reaming self-locking anchor cable comprising steel wire bundle according to claim 1 and 2, is characterized in that: the manufactured materials of described split-type pipe (6) is Q235B steel sleeve.
5. the preparation method comprising the rock reaming self-locking anchor cable of steel wire bundle according to claim 1, is characterized in that described preparation method comprises the following steps successively:
The first step: first bore straight hole on rock, expand to form bottom reaming (22) to the bottom of this straight hole again, exit orifice (2) can be obtained after expansion, this exit orifice (2) from top to bottom comprise connect successively upper straight hole (21), bottom reaming (22);
Second step: first make many steel wire bundles (4), every root steel wire bundle (4) is all formed by many un-bonded prestressed steel strands system of twisting, again steel wire bundle (4) is passed successively the top jack (32) on tapered end (3), bottom jack (34), when steel wire bundle (4) penetrates bottom jack (34), intermediate plate (5) is inserted with fixing steel wire bundle (4) and tapered end (3) along bottom jack (34) from bottom to top, after insertion, intermediate plate (5) is stuck in steel wire bundle (4), between the hole wall of bottom jack (34), now, steel wire bundle (4), tapered end (3) assembles complete,
3rd step: first by steel wire bundle (4) complete for above-mentioned assembling, tapered end (3) puts into exit orifice (2) in the lump, split-type pipe (6) is inserted in again in the outside of anchoring section, split-type pipe (6) now comprises multiple flap portions (62) of limiting section (61) and bottom connection thereof from top to bottom, the bottom in flap portion (62) contacts with the top of tapered end (3), then be inserted in the outside of anchoring section and the outlet sleeve (7) of split-type pipe (6) with diameter, the bottom of this outlet sleeve (7) contacts with the top of split-type pipe (6), give the power that outlet sleeve (7) is downward again, split-type pipe (6) presses down by descending outlet sleeve (7), in the process that split-type pipe (6) is pressed down, can scatter in flap portion (62), until be stuck in tapered end (3) top, position between bottom, now, the front end in the flap portion (62) of scattering is connected with the hole wall of bottom reaming (22) to play the fixing effect of machinery, then outlet sleeve (7) is taken away, grouting material (1) is injected again from top grout hole (31), this grouting material (1) experiences top grout hole (31) successively, overflow into behind bottom grout hole (33) in bottom reaming (22), then by bottom reaming (22) to vertical spread, when grouting material (1) spreads to anchoring section, grouting is stopped during line of demarcation (A) of stretch-draw section, after solidifying Deng grouting material (1), the rock reaming self-locking anchor cable of steel wire bundle is comprised described in can obtaining.
6. the preparation method comprising the rock reaming self-locking anchor cable of steel wire bundle according to claim 5, it is characterized in that: in described second step, pass the top jack (32) on tapered end (3), bottom jack (34) at steel wire bundle (4) before, first steel wire bundle (4) is numbered.
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| CN105986572A (en) * | 2015-03-01 | 2016-10-05 | 方军 | Self-locking type pull-resisting anchor head |
| CN108951619A (en) * | 2018-09-19 | 2018-12-07 | 武大巨成结构股份有限公司 | A kind of self-locking anchor head of easy expanding and expanding method |
| CN113605464A (en) * | 2021-08-24 | 2021-11-05 | 武大巨成结构股份有限公司 | Self-locking technology-based foundation anti-floating first-aid repair structure and method |
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| CN104234052B (en) | 2016-04-20 |
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