CN202132060U - Anchoring structure for liquid-filled corrosion resistant anchor rod or anchor rope - Google Patents

Abstract

The utility model discloses an anchoring structure for a liquid-filled corrosion resistant anchor rod or anchor rope, comprising a resin end-anchored anchor rod body or anchor rope body mounted in an anchor hole, wherein a slurry stopper is further mounted on the orifice of the anchor hole; the head of the anchor rod head or the head of the anchor rope are exposed outside the anchor hole from the jack of the slurry stopper; two jacks are further formed on the slurry stopper; a liquid filling nozzle is inserted into one jack and chemical slurry is filled into the anchor hole through the liquid filling nozzle; besides, an exhaust pipe opened at both ends is inserted into the other jack; a non-return valve ball and a return spring are mounted within the inlet of the liquid filling nozzle; a locking groove connected with a slurry filling device is formed on the circumferential surface of the inlet end of the liquid filling nozzle; the length of the exhaust pipe is equivalent to the length of the end-anchored anchor rod body or anchor rope body; and an exhaust hole is formed on the circumferential surface of the exhaust pipe which is close to a drilled bottom. The anchoring structure effectively solves the problems of waster sealing and corrosion resistance at parts such as an arch part and the like; and the anchoring structure can be taken as either a permanent support or a temporary support.

Description

The anchor structure of fluid injection anticorrosion anchor rod or anchor cable

Technical field

The utility model relates to anchor pole or the anchor cable that mine, traffic, hydraulic engineering supporting are used, and relates in particular to fluid injection anticorrosion anchor rod and anchor cable that glued soft-rock tunnel a little less than the argillization that contains strong alkaline water, chamber and tunnel support are used.

Background technology

In mine working, chamber and the constructing tunnel that geotechnical engineering relates to, jeopardize safety for preventing surrouding rock deformation or unstability, a kind of main support technology that country rock is reinforced is to adopt anchor pole or cable bolting.Anchor pole or cable bolting are to bore anchor hole on the roadway surrounding rock, and (interior dress anchor pole is called anchor eye, square at anchor hole with anchor pole or anchorage cable anchoring; Interior dress anchor cable is called the anchor cable hole) in.Anchor pole and anchor cable are with a kind of supporting type, only are the differences of material forms.The also available anchor cable of the anchor pole of the following stated replaces.

The anchor pole type can be divided into mechanical anchor formula, total length bond-anchorage formula, resin-bonded anchoring type, friction-type by anchoring process; Can be divided into common bolt and prestressed anchor by the prestressing force mode; Can be divided into full length fastening and end anchorage by the anchoring section form.Modal be with resin-bonded termination point of anchor rod in anchor hole bottom, abbreviate " resin end anchor formula " as.Bolt support can be brought into play the stabilizing power of geotechnical body self fully; Be a kind of little to the protolith disturbance, speed of application is fast, safe and reliable, cost-effective reinforcing technique; In mine construction, obtained using widely, obtained good economic benefit and social benefit.

But in certain areas, belonging to Jurassic system basement rock stratum, mainly is mud stone layer, sand layers, mud sandstone alternating layers; Wherein sand layers is rich in pore water; And the mud stone water-swellable, sandstone, mud stone intensity are all not high, and degree of consolidation is low; Chance water softening, intensity sharply descend, and are glued dilatancy soft rock a little less than the typical argillization.Mainly there is following problem in this geological condition when adopting anchor pole or cable bolting construction:

(1) country rock mainly is mud stone, sandstone alternating layers around the tunnel, and the mud stone layer has water shutoff property preferably, and sand layers is rich in pore water, but the intensity of mud stone and sandstone and degree of cementation are all lower, and meets the easy expansion of water electrode, softening, and intensity sharply descends.Even surface, tunnel country rock is not moisture; Owing to, connect each other between each rock stratum in the disturbance of construction during square, particularly gang up water-bearing stratum after; Cause pore water to ooze out; Cause each rock stratum to suffer large tracts of land water enchroachment (invasion) evil, cause rock property reduction, intensity to be fallen suddenly, anchor pole is also owing to lose required anchoring strength and global failure.Therefore, ganging up the aquifer problem when how to overcome the square construction, is one of key of glued dilatancy soft-rock tunnel a little less than the solution argillization, chamber anchor pole effective support.

(2) a little less than the argillization in the glued soft rock rock stratum moisture major part be strong basicity, more serious to the corrosion of anchor pole." resin end anchor formula " structure of using in tunnel, the chamber support only is to live the body of rod in the anchor hole bottom with chemical anchoring agent (resinoid bond) anchoring, so be called " end anchor ".This anchor structure is except that anchoring section receives the parcel protection of anchoring agent, and all the other most of anchor rod bodies all are exposed in the anchor eye air.When square infiltrated strong alkaline water, the serious consequence that lost efficacy in the period of service very easily took place in anchor bar body after the corrosiveness that receives strong alkaline water for a long time.Therefore, how to avoid the large tracts of land etching problem of the free section of anchor rod body, be solve glued dilatancy soft-rock tunnel a little less than the argillization, chamber anchor pole effective support key two.

(3) in order to address the above problem, some engineering attempts using total length bond-anchorage type anchor pole.Common total length bond-anchorage formula anchor pole is the hollow type grouted anchor bar at present, and it is made up of hollow type anchor bar body and stop grouting plug, is processed with some eyelets on the anchor bar body, charges into cement grout in the gap of square and anchor bar body.This hollow type grouted anchor bar is often owing to reasons such as construction and rock stratum densifications, and grouting serous fluid can not be filled full eye.When the anchor pole of construction arch, because the upwards extruding of intraocular air can't be discharged fully; The cement grout that causes being annotated is leakiness often, and regular meeting stays big space, and cement grout can not be filled full eye; Do not reach water shutoff, corrosion-resistant effect, and cement grout there is corrosiveness to anchor bar body.Simultaneously, the lever strength of hollow type grouted anchor bar is lower, and country rock is stressed can not to provide enough anchored force when big.Therefore, how to improve anchor rod strength, thereby and guarantee that closely knit and the timely discharge of total length bonding anchor pole slurries total length intraocular air reaches water shutoff, corrosion-resistant effect, be glued dilatancy soft-rock tunnel a little less than the solution argillization, chamber anchor pole effective support key three.

In sum, single end anchorage type and common grouted anchor bar all can not effectively solve water shutoff, anticorrosion problem in the reinforcing of glued dilatancy soft rock strata a little less than argillization, and supporting effect is not satisfactory.

Summary of the invention

The utility model is for solving the supporting problem of glued dilatancy soft-rock tunnel a little less than the argillization, chamber, and the pluses and minuses of binding end anchor anchor pole and grouted anchor bar provide the anchor structure of a kind of total length fluid injection anticorrosion anchor rod and anchor cable.This anchor pole and anchor cable can form high-strength anchored force rapidly after installing, and effectively solve the water shutoff of position squares such as arch, anticorrosion problem, both can be used as permanent support, can be used as temporary lining again.

The total length fluid injection anticorrosion anchor rod of the utility model or the anchor structure of anchor cable; It comprises resin end anchor formula anchor pole or the anchor cable body that is installed in the anchor hole; It is characterized in that stop grouting plug also is installed, and anchor pole or anchor cable head expose outside the anchor hole from the jack of stop grouting plug on the aperture of anchor hole; Also be processed with two jacks on the described stop grouting plug, insert liquid injecting mouth in the jack, in anchor hole, charge into chemical grout, insert the stack of open at both ends in another jack through liquid injecting mouth;

In the described liquid injecting mouth import check-valve ball and return spring are installed, liquid injecting mouth entrance point side face is provided with the draw-in groove that is connected with grouting equipment;

Described stack length is suitable with end anchor anchor pole or anchor cable body length, on the stack side face near foot of hole, has steam vent.

But above-mentioned stack is double as high-pressure slip-casting pipe also, when after the fluid injection construction is accomplished, needing high-pressure slip-casting again, can connect the enterprising horizontal high voltage mortar depositing construction of high-pressure slip-casting equipment.

The anchor structure advantage of this total length fluid injection anticorrosion anchor rod and anchor cable is:

(1) owing to enriched chemical grout in the anchor hole; It is bigger to produce anchored force; Water blockoff, favorable anti-corrosion effect; Can effectively solve the string water and the anchor pole corrosion difficult problem of glued dilatancy soft-rock tunnel a little less than the argillization, chamber square, thereby avoid the country rock of mud stone, sandstone character to meet water reduction and intensity decline problem;

(2) than existing hollow type grouted anchor bar, employed anchor bar body or anchor cable body are solid, and bigger anchored force can be provided;

(3) working procedure system, convenient, fast has simultaneously realized the total length bonding again playing the anchor pole corrosion-resistant, does not influence normal anchor bolt construction operation;

(4) can partly recover the stress of primary rock, guarantee that anchor pole is stressed to be evenly distributed, better bring into play the support action of anchor pole;

(5) processing technology thereof is simple and reliable, and cost performance is superior, and physical and mechanical property is stable.

Description of drawings

Fig. 1 is the organigram of the utility model;

Fig. 2 is the utility model liquid injecting mouth organigram.

Marginal data: 1-liquid injecting mouth, 2-stack, 3-stop grouting plug, 4-anchor bar body, 5-check-valve ball, 6-draw-in groove, 7-return spring, 8-anchor hole, 9-nut, 10-pallet, 11-steam vent, 12-termination resin anchoring section, 13-chemical grout.

The specific embodiment

As shown in Figure 1, the anchor structure of the total length fluid injection anticorrosion anchor rod of the utility model is, it comprises the resin end anchor formula anchor bar body 4 that is installed in the anchor hole 8, and stop grouting plug 3 also is installed on the aperture of anchor hole 8, and the anchor pole head exposes outside the anchor hole 8 from the jack of stop grouting plug 3; Also be processed with two jacks on the described stop grouting plug 3, insert liquid injecting mouth 1 in the jack, in anchor hole 8, charge into chemical grout 13, insert the stack 2 of open at both ends in another jack through liquid injecting mouth 1; Described stack 2 length are suitable with anchor bar body 4 length, have steam vent 11 on stack 2 side faces near boring 8 bottoms.As shown in Figure 2, check-valve ball 5 and return spring 7 are installed in described liquid injecting mouth 1 import, liquid injecting mouth 1 entrance point side face is provided with the draw-in groove 6 that is connected with grouting equipment.

Liquid injecting mouth 1 length 150mm～200mm among the embodiment, external diameter 4～6mm.Stack 2 is the steel tube body of hollow, and external diameter 4～6mm has steam vent 11 on its side face in the 100～200mm length range of bottom.

Construction sequence is following:

After accomplishing fluently anchor hole 8, termination anchoring type anchor bar body 4 is installed at first, is formed termination resin anchoring section 12 in anchor hole 8 bottoms after construction is accomplished, install stop grouting plug 3, liquid injecting mouth 1 and stack 2 again; Carry out fluid injection through liquid injecting mouth 1; Chemical grout 13 charges at the bottom of the hole from the aperture; Air are discharged through stack 2 in the anchor hole 8, the space at the bottom of aperture to the hole gradually by chemical grout 13 fill up, closely knit, thereby realize that anchor bar body 4 total lengths are by chemical grout 13 sealings and bonding.Chemical grout 13 solidifies preceding tray 10, fastening nut 9, or apply prestressing force, accomplish and install.

Anchor bar body 4 among the embodiment can use the anchor cable body to replace.

Claims (1)

1. the anchor structure of fluid injection anticorrosion anchor rod or anchor cable; It comprises resin end anchor formula anchor bar body or the anchor cable body that is installed in the anchor hole; It is characterized in that stop grouting plug also is installed, and anchor pole head or anchor cable head expose outside the anchor hole from the jack of stop grouting plug on the aperture of anchor hole; Also be processed with two jacks on the described stop grouting plug, insert liquid injecting mouth in the jack, in anchor hole, charge into chemical grout, insert the stack of open at both ends in another jack through liquid injecting mouth;

In the described liquid injecting mouth import check-valve ball and return spring are installed, liquid injecting mouth entrance point side face is provided with the draw-in groove that is connected with grouting equipment;

Described stack length is suitable with end anchor anchor bar body or anchor cable body length, on the stack side face near foot of hole, has steam vent.

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