CN1771380B

CN1771380B - Expandable injection bolt and grouting method using same

Info

Publication number: CN1771380B
Application number: CN2005800002538A
Authority: CN
Inventors: 平野健吉; 阿波宏司
Original assignee: Denki Kagaku Kogyo KK; KFC Corp
Current assignee: Denka Co Ltd; KFC Corp
Priority date: 2004-01-28
Filing date: 2005-01-25
Publication date: 2010-05-05
Anticipated expiration: 2025-01-25
Also published as: WO2005073510A1; CN1771380A; TW200533821A; KR20060109285A; JP4902351B2; KR101153760B1; TWI335377B; JP2007528456A

Abstract

An expandable injection bolt (1A) comprising an expandable section (3), which has a tubular shape capable of applying an internal pressure form a rear end portion and expands in a radial direction when the internal pressure is applied, and an injection port forming section (9A) which opens an injection port (7) when the internal pressure is applied, wherein the expandable section (3) is expanded by the internal pressure so as to tightly adhere to ground, then the injection port forming section (9A) is caused to open the injection port (7), and a grout can be injected into the ground through the injection port (7) to reinforce the ground.

Description

Grouting bolt and use the grouting method of this bolt expands

Technical field

The present invention relates in the natural ground reinforcement engineering of for example construction of tunnel etc. double as rock bolting bolt and pour into the expansion grouting bolt that pipe uses, and the grouting method that uses this bolt.

Background technology

In known technology, hole on the inclined-plane of natural ground with auger, to pour into pipe inserts in this boring, after pouring into hardening such as cement paste grouting material, Steel Bolt type rock bolting bolt is inserted in the boring, the sclerosis by hardening grouting material makes the rock bolting bolt, and by making support plate project to the bolt part of outside rock bolting bolt by holing certainly, screw tight with nut, carry out reinforcement (for example, with reference to the open 2000-303480 communique of Japan Patent).

As the rock bolting bolt that can not use hardening grouting material to fix, known have form the leading section locking, have the tubulose of supply port in rearward end, but possess the expansion bolt (for example, with reference to Japanese patent laid-open publication gazette 1990-520) of the bulge of expanded radially by pressing in applying at pars intermedia.This expansion bolt constitutes by pressing in after-applied inserting boring, is bulge that the part with the pipe of plastically deformable pushes inboard cross sectional shape towards expanded radially, thus with closely applying of boring.

Yet, under the Steel Bolt type rock bolting bolt situation fixing, following problem is arranged by hardening grouting material.

Make it to strengthen for material that hardening is in the milk pours in the ground around the boring, must make to pour into fully sealing between pipe and the boring peristome, under high pressure supply with hardening grouting material, make hardening grouting material fully permeate ground on every side.Yet not only sealing is difficult to carry out, and must impose sealing when pipe inserts pouring into, and pouring into pipe depressurization when extracting, makes operation very poor.Particularly when spring is arranged, even hardening grouting material is in order to pouring into, hardening grouting material will be rushed out before sclerosis, makes fixedly the having difficulties of rock bolting bolt.And, during hardening grouting material is presclerotic in, the distortion of natural ground takes place easily, enlarge the loose range of natural ground easily.

On the other hand, under the expansion bolt situation, owing to can not use hardening grouting material to fix, so the advantage that can not take place as above-mentioned problem is arranged.

Yet under this expansion bolt situation, the problem of existence is: when ground was fragile around, even bulge is expanded, bed knife was still not enough, thereby makes reinforcing effect bad.Though it can pour into pipe by use as Steel Bolt type rock bolting bolt, the hardening material that is in the milk is poured into boring, ground is strengthened to be solved, but, if so, promptly can take place and the identical problem of above-mentioned Steel Bolt type rock bolting bolt.

Because above-mentioned known problem proposed the present invention, its purpose is to utilize when possessing the advantage of expansion bolt pouring into of hardening grouting material that ground is on every side strengthened.

Summary of the invention

According to an aspect of the present invention, provide a kind of expansion grouting bolt, it has: a bulge, and this bulge has tubular form, can apply interior pressure from rearward end, but and expanded radially during pressure during applying; And one pour into interruption-forming portion, when pressing in applying, makes to pour into and mouthful open.

Expansion grouting bolt of the present invention can expand bulge by pressing in applying, closely connected ground, and can make and pour into a mouthful opening pouring into interruption-forming portion. and, after to the closely connected of this ground and the opening that pours into mouthful, can pour into hardening grouting material by rearward end, the hardening material that is in the milk be poured into ground on every side via above-mentioned peristome from this expansion grouting bolt.

Because as above-mentioned, the bulge of expansion grouting bolt of the present invention expands, closely connected ground is between sealed expansion grouting bolt and ground.So, even there is spring, but sealing still, and need not wait for pouring into and hardening of hardening grouting material.In addition,, can prevent the leakage of hardening grouting material by above-mentioned sealing, hardening grouting material pour into good work, and can strengthen ground on every side, even so, still obtain good stationary state to fragile ground by hardening the pouring into of material of being in the milk.

And, because expansion of the present invention grouting bolt still gives over to the rock bolting bolt after hardening is in the milk pouring into of material, so after hardening is in the milk pouring into of material, still keep above-mentioned sealing,, still can prevent the outflow of hardening grouting material even under the situation that has spring to exist.Even more because expansion of the present invention grouting bolt around under the fragile situation of ground, if bulge is expanded, closely connected ground, the pouring into and harden of hardening grouting material needless to say still, although obtain insufficient, but reach reinforcing effect to a certain degree, thus can suppress hardening grouting material presclerotic during in natural ground loosening.

The interruption-forming portion that pours into of expansion of the present invention grouting bolt roughly is divided into, and uses by interiorly crushing broken maintenance sleeve, using the lid and lid sleeve and other structure that separate by interior pressure.After it in detail and advantage is illustrated in.

And, the present invention also provides a kind of grouting method, this method comprises that the expansion grouting bolt with the invention described above inserts in the ground, be pressed on the grouting bolt that expands in applying, the opening that carries out the expansion of bulge and pour into mouthful, to the grouting bolt supplying hardening grouting material that expands, pour into hardening grouting material around via the open mouth that pours into.

Grouting method of the present invention is the construction method of feature that has adopted the expansion grouting bolt of the invention described above, as above-mentioned, it can be when the ground that pours into that utilizes hardening grouting material be strengthened engineering, make the early stage sealing of spring, prevent the leakage and the outflow of hardening grouting material, natural ground became flexible in inhibition hardening grouting material hardened between early stage.

And, after the embodiment of grouting method of the present invention and other advantage are illustrated in.

Description of drawings

Fig. 1 shows expand first embodiment of grouting bolt of the present invention, omits the stereogram of pars intermedia;

Fig. 2 is the vertical view of expansion grouting bolt shown in Figure 1;

Fig. 3 is the sectional drawing of expansion grouting bolt shown in Figure 1;

Fig. 4 A and Fig. 4 B are the key diagrams of expansion grouting bolt leading section shown in Figure 1, and Fig. 4 A is an amplification profile, and Fig. 4 B is a front elevational view;

Fig. 5 shows that boring forms the accompanying drawing of step;

Fig. 6 A and Fig. 6 B show the accompanying drawing of expansion grouting bolt to the inserting step of boring, and Fig. 6 A shows the accompanying drawing that inserts the expansion grouting bolt of holing, and Fig. 6 B is the amplification profile of bulge among Fig. 6 A;

Fig. 7 A and Fig. 7 B are the accompanying drawings that shows the expansion step of the grouting bolt that expands, and Fig. 7 A is the accompanying drawing that is presented at the expansion grouting bolt that bulge expands in the boring, and Fig. 7 B is the amplification profile of bulge among Fig. 7 A;

Fig. 8 A～Fig. 8 C shows the accompanying drawing that pours into the interruption-forming step, Fig. 8 A is the accompanying drawing that is presented at the expansion grouting bolt that pours into mouthful opening in the boring, Fig. 8 B pours into mouthful opening not long ago to pour near the amplification stereogram of interruption-forming portion, and Fig. 8 C pours near the mouth amplification stereogram of the interruption-forming portion that pours into of opening;

Fig. 9 is the accompanying drawing that pours into step that shows hardening grouting material;

Figure 10 shows another the routine accompanying drawing that pours into the interruption-forming step;

Figure 11 is the sectional drawing that shows second embodiment that pours into interruption-forming portion;

Figure 12 is the sectional drawing that shows the 3rd embodiment that pours into interruption-forming portion;

Figure 13 is the sectional drawing that shows the 4th embodiment that pours into interruption-forming portion;

Figure 14 shows expand second embodiment of grouting bolt of the present invention, omits the stereogram of pars intermedia;

Figure 15 is to use the packing member, and the part applies and is used for making the key diagram that pours into the situation of the interior pressure that interruption-forming portion opens shown in Figure 14;

Figure 16 shows expand the 3rd embodiment of grouting bolt of the present invention, omits the stereogram of pars intermedia;

Figure 17 shows the expand outside drawing of the 4th embodiment of grouting bolt of the present invention;

Figure 18 A and Figure 18 B are the sectional drawings of the rearward end (supply side of hardening grouting material) of expansion shown in Figure 17 grouting bolt and front (boring deep side);

Figure 19 A～Figure 19 C is the sectional drawing of A-A ', B-B ', each section of C-C ' shown in Figure 18 A and Figure 18 B;

Figure 20～Figure 22 can be used for the present invention, by the sectional drawing of the not isostructure example of covering the interruption-forming portion that pours into that constitutes with sleeve and lid;

Figure 23 connects to prolong the sectional drawing that the back constitutes the expansion grouting bolt leading section of rear end side;

Figure 24 connects to prolong the sectional drawing that the back constitutes the expansion grouting bolt rearward end of front;

Figure 25 A and Figure 25 B are the key diagrams that can prolong the connecting portion of the grouting bolt that expands, and Figure 25 A is the sectional drawing of the connecting portion of two grouting bolts that expand, and Figure 25 B is the outside drawing of the connecting portion of two grouting bolts that expand;

Figure 26 A and Figure 26 B are respectively the sectional drawing of demonstration for the structure example of the accessory of the usefulness that is installed on the grouting bolt that expands;

Figure 27 is the accompanying drawing that shows the formation step of boring;

Figure 28 A and Figure 28 B show the accompanying drawing of expansion grouting bolt to the inserting step of boring, and Figure 28 A shows the accompanying drawing that inserts the expansion grouting bolt of holing, and Figure 28 B is an A-A ' sectional drawing among Figure 28 A;

Figure 29 A and Figure 29 B are the accompanying drawings that shows the expansion step of the grouting bolt that expands, and Figure 29 A is the accompanying drawing that is presented at the expansion grouting bolt that bulge expands in the boring, and Figure 29 B is an A-A ' sectional drawing among Figure 29 A;

Figure 30 shows to pour into the accompanying drawing of interruption-forming step, thereby shows the higher interior state that lid is separated of pressing that applies;

Figure 31 is to use near the sectional drawing the driving workshop section in the construction of tunnel of grouting method of the present invention;

Figure 32 is the elevation of driving workshop section.

The specific embodiment

Below, the present invention is described with reference to the accompanying drawings.

Fig. 1 shows expansion grouting bolt first embodiment of the present invention, pars intermedia abridged stereogram, Fig. 2 is the vertical view of expansion grouting bolt shown in Figure 1, Fig. 3 is the sectional drawing of expansion grouting bolt shown in Figure 1, and Fig. 4 A and 4B are the amplification view and the amplification front elevations of the leading section of expansion grouting bolt shown in Figure 1.

As Fig. 1～shown in Figure 3, the expansion of the present embodiment grouting bolt 1A forms possesses inlet sleeve 2 (mouth sleeve) of the rearward end be located at and the tubulose that one is connected in the bulge 3 in these inlet sleeve 2 the place aheads, and formation can apply interior pressure via the sleeve 2 that enters the mouth.

Even forming, depresses by inlet sleeve 2 interior, pipe shape that in fact can hole enlargement still, and its axis opening and bulge 3 interior spaces are connected.The inner peripheral surface of inlet sleeve 2 forms threaded portion 5, and is via weld flush formula welding 4, integrated with bulge 3.This threaded portion 5 connect be used in press in the aftermentioned supply with, the utensil of the supply of hardening grouting material, the operation that utilizes drilling tool 6 (with reference to Figure 10) to form to pour into mouthful 7 (with reference to Fig. 8 A and 8C) etc.Though the threaded portion 5 of illustrated example is formed at the inner peripheral surface of inlet sleeve 2, but, also can be formed at outer peripheral face.

By the section of Fig. 1 part as can be known, bulge 3 vertically, inwardly side pressure falls into the part of pipe, has the structure that crooked cross section of pressing the depression part 8 that falls into roughly is the C font is set.This bulge 3 can be released outside, expanded radially with depression part 8 by applying interior pressure.

The bulge 3 of expansion grouting bolt 1A is by carrying out above-mentioned expansion, and after also can pressing in removing, the plastically deformable material that keep this inflated configuration constitutes.Particularly, though can use metals such as iron, copper, aluminium or its alloy, but, general intensity in order to obtain is to be made of better steel pipe.And, by purposes, also can or use its material to constitute by flexibility material such as rubber or synthetic resin as base material.

The bulge 3 of the present embodiment is connected to front end near above-mentioned inlet sleeve 2, the fore-end formation of bulge 3 pours into the 9A of interruption-forming portion.Pour into the 9A of interruption-forming portion and be to form and be used for aftermentioned hardening grouting material is poured into mouthful 7 (with reference to Fig. 8 A and Fig. 8 C) that pour into of ground by interior pressure, the 9A of the interruption-forming portion that pours into of the present embodiment possesses: can brokenly keep sleeve 10, its calking is installed on the leading section of bulge 3; Embrittlement portion (on accompanying drawing with other parts and indistinction), it is formed at the bulge 3 of these maintenance sleeve 10 calking installation regions; And weld portion 11 (with reference to Fig. 3 and Fig. 4 A, Fig. 4 B), the front end opening of its inaccessible bulge 3.

Be installed in two ora terminalis of the maintenance sleeve 10 of bulge 3 leading sections in calking, the correspondence position on the pressure swallow (the discontinuous portion that roughly is the C glyph shape) of the depression part 8 that is formed at bulge 3 forms and cracks 12.Though it is 12 optional that this cracks, preferably it is provided with, to be easy to adjust the cracking pressure that aftermentioned keeps sleeve 10.Though keep the sleeve 10 can be by constituting with the material identical materials that constitutes bulge 3, but, for adjusting the aftermentioned cracking pressure, also can constitute by different materials.

Specifically shown in Fig. 4 A and Fig. 4 B, the front end opening of bulge 3 is fused portion's 11 obturations, releases the hole enlargement that is caused thereby can suppress depression part 8.This weld portion 11 covers the front opening of bulge 3 along the roughly C glyph shape of bulge 3 front ends, across bulge 3 front ends and keep 10 in sleeve, do not connect the pressure swallow of depression part 8.Therefore,, promptly shown in Fig. 4 B arrow, make the not hole enlargement of bulge 3 front ends,,, make to keep sleeve 10 fragmentations cracking 12 via above-mentioned from pressing swallow to the open strength in both sides though apply if be pressed on bulge 3 in applying.

Part or all of bulge 3 fore-ends that above-mentioned maintenance sleeve 10 calkings are installed constitutes physically or the embrittlement portion of fragilityization (on accompanying drawing with other parts and indistinction) chemically.This embrittlement portion means and can break along with the fragmentation of above-mentioned maintenance sleeve 10, makes to pour into mouthful 7 (with reference to a Fig. 8 A and Fig. 8 C) opening, the part of breaking easily or rupturing.

Above-mentioned embrittlement portion can be by utilizing work hardening such as for example undergauge processing fragilityization, utilize heating or cooling processing fragilityization, by hydrogen or acetylene gas fragilityization, utilize Carburization Treatment or acid or alkali treatment fragilityization, its formation such as combination grade.For example, can maintenance sleeve 10 be installed,, form the embrittlement portion of work hardening bulge 3 undergauges of this part by calking.And, also can utilize the thermosetting embrittlement portion when forming weld portion 11.

In the present embodiment, near the bottom of the depression part 8 by the work hardening embrittlement when utilizing it to form, calking is installed and is kept sleeve 10 till bulge 3 undergauges, and weld portion 11 is set, and further work hardening forms embrittlement portion.Again since near the bottom of depression part 8 as described later, easily apply big strength, so suitable position as formation embrittlement portion by the fragmentation that keeps sleeve 10.

The expansion grouting bolt 1A of the present embodiment is being wound with sealing material 13 near the rearward end of bulge 3 and the peripheral part of close leading section.As sealing material 13, except rubber, elastic body elastomeric material, also can use cloth and silks such as woven cloth, nonwoven.Though sealing material 13 is the elastomeric materials that can become along with the expansion of bulge 3, can also closely connected sealing material 13 in the outer peripheral face of bulge 3, but, using under the situation such as cloth and silk, with lax the coiling better of degree of the expansion of tolerable bulge 3.And the recess of depression part 8 preferably can be filled.

Because if above-mentioned sealing material 13 is set, bulge 3 is promptly along with its expansion, via sealing material 13, closely connected ground, thus can improve sealing, can positively guarantee to prevent hardening be in the milk material leakage and prevent that spring from gushing out.In the present embodiment, though being located near rearward end, sealing material 13 reaches near leading section two places, but, also can only be sealing material 13, or sealing material 13 is set more than three places near rearward end.

The inlet sleeve 2 of the expansion grouting bolt 1A of the present embodiment constitutes a succession of bulge 3 in the place ahead slightly, but, but rearward end or the leading section with illustrated bulge 3 makes the simple tubing with suitable length, forward partially end side or rearward end side are provided with bulge 3, perhaps, also can axially interconnect state for 3 one-tenth, form expansion grouting bolt 1A with a plurality of bulges 3 by connect a plurality of bulges with tubing.

Secondly, of the present invention a kind of grouting method example of using the illustrated expansion grouting bolt 1A of above-mentioned Fig. 1～Fig. 4 A, 4B is illustrated.

Fig. 5～Fig. 9 is the accompanying drawing of first embodiment that shows the order of grouting method of the present invention, Fig. 5 is the accompanying drawing that shows the formation step of boring, Fig. 6 A and Fig. 6 B show the accompanying drawing of grouting bolt to the inserting step of boring that expand, Fig. 6 A is the accompanying drawing that shows the expansion grouting bolt that inserts boring, Fig. 6 B is the amplification profile of the bulge of Fig. 6 A, Fig. 7 A and Fig. 7 B are the accompanying drawings that shows the expansion step of the grouting bolt that expands, Fig. 7 A is the accompanying drawing that is presented at the expansion grouting bolt that bulge expands in the boring, Fig. 7 B is the amplification profile of the bulge of Fig. 7 A, Fig. 8 A～Fig. 8 C shows the accompanying drawing that pours into the interruption-forming step, Fig. 8 A is the accompanying drawing that is presented at the expansion grouting bolt that pours into mouthful opening in the boring, Fig. 8 B shows near the amplification stereogram of the opening interruption-forming portion that pours into not long ago that pours into mouth, Fig. 8 C shows near the amplification stereogram of the interruption-forming portion that pours into that pours into mouthful opening, and Fig. 9 is the accompanying drawing that pours into step that shows hardening grouting material.In these accompanying drawings, symbology identical components or the position identical with above-mentioned Fig. 1～Fig. 4 A, 4B.

As shown in Figure 5, form the boring 15 of desired depth by drill 14.

After boring 15 forms, as shown in Figure 6A, insert above-mentioned boring 15 by the grouting bolt 1A that will expand from front (pouring into the 9A of interruption-forming portion side), and the grouting bolt 1A that will expand inserts ground.Under this state, shown in Fig. 6 A and Fig. 6 B, the bulge 3 of the grouting bolt 1A that expands or not, and having under the enough and to spare state around bulge 3 and sealing material 13, inserts in the boring 15.

For the grouting bolt 1A that will expand inserted ground, it was optional to form boring 15, at Soft Grounds such as for example clay matter, also can not form boring 15, and by directly pushing with hydraulic press etc., grouting bolt 1A insertion ground will expand.

16 is the accessories that are used for connecting aftermentioned force feed flexible pipe 17 (with reference to Fig. 7 A) shown in Fig. 6 A, and it has and is used for pressure is conducted to supply hole 18 in the grouting bolt 1A that expands, can connect force feed flexible pipe 17 under these supply hole 18 states being communicated with.Accessory 16d is screwed into the threaded portion 5 that portion 44 was screwed into and was installed on the inlet sleeve 2 that is located at the grouting bolt 1A that expands.The installation of this accessory 16 can be carried out before the grouting bolt 1A that expands inserts boring 15, also can carry out after insertion.

Then, shown in Fig. 7 A, force feed flexible pipe 17 is connected to above-mentioned accessory 16, from force feed flexible pipe 17, via accessory 16, grouting bolt 1A applies interior pressure to expanding.Apply in this in the fluid pressure mode and to press.Though can be undertaken by gas-pressurizeds such as for example compressed air, but general to apply the fluid under pressure of big pressure easily, particularly pressure (hydraulic) water is better.

Because shown in Fig. 7 B, the bulge 3 of the grouting bolt 1A that expands is by pressing expanded radially in above-mentioned, the inner peripheral surface of closely connected boring 15 is so even have under the situation of spring in boring 15, also can stop spring to be gushed out.Particularly because in sealing material 13 placements, sealing material 13 improves close-fitting state, so can improve stagnant water effect more.And, even around under the fragile situation of ground, still can obtain the bed knife of the expansion grouting bolt 1A of a certain degree by the expansion of this bulge 3.

The expansion of above-mentioned bulge 3 preferably utilizes than mouthful required low pressure of opening pouring into the 9A of interruption-forming portion of pressure of 7 (with reference to Fig. 8 A and Fig. 8 C) that pours into to be carried out. particularly, be higher than the required minimum pressure of acquisition expectation expansion with utilization, but being lower than the pressure that pours into mouthful 7 pressure of opening that can make in the 9A of the interruption-forming portion that pours into shown in Fig. 8 A and Fig. 8 C carries out better. if do not pour into mouthful 7 openings between tailend in the expansion of bulge 3, press in promptly taking place and leak, must supply with, cause being difficult to the operation of expanding greater than the interior pressure (supply pressure (hydraulic) water) of leaking value.

After the expansion of the bulge 3 of the grouting bolt 1A that expands reaches necessary amount, pour into mouthfuls 7 and open at the interruption-forming portion that the pours into 9A place shown in Fig. 8 A and Fig. 8 C by supplying with more high pressure, making.

Below above-mentioned pouring into poured into mouthfuls 7 opening principle and is illustrated among the 9A of interruption-forming portion.

At first,,, can apply to the open strength in both sides, thereby 12 make and keep sleeve 10 fragmentations via above-mentioned cracking to the pressure swallow of depression part 8 though bulge 3 leading sections of the present embodiment apply not hole enlargement as shown in Fig. 4 A, the 4B.Therefore, if supply with than realizing the required higher pressure of pressure that expands, promptly shown in Fig. 8 B, at bulge 3 front ends, crack 12 via above-mentioned, make to keep sleeve 10 fragmentations, open both sides, and weld portion 11 is out of shape along with keeping sleeve 10 distortion, exposes the bottom of depression part 8 (with reference to Fig. 1).And under interior pressure effect, the strength of direction shown in the arrow acts on the vicinity, bottom of depression part 8 among the figure.Thereby by this strength effect, near the above-mentioned embrittlement portion that is formed at 8 bottoms, depression part breaks, and makes and pours into mouthful 7 openings shown in Fig. 8 C.Because as mentioned above, near the particularly work hardening when forming and by the fragilityization bottom of depression part 8, and when 10 fragmentations of maintenance sleeve, be under the big strength effect, thereby be suitable for as embrittlement portion.

Above-mentioned pour into mouthful 7 openings after, press (discharge adds hydraulic water) in removing according to need, loading onto accessory 16 or unloading under the situation of accessory 16, via force feed flexible pipe 17, the sleeve 2 that enters the mouth is certainly supplied with hardenings grouting materials.As for hardening grouting material, for example can use that cement water slurry, swell soil-water glass suspension, sodium silicate solution, the chromium Ni Gelin aqueous solution, the urea resin aqueous solution, the acrylic amine aqueous solution, acrylates are the aqueous solution, urethane resin liquid etc., can be according to the selections such as character state of ground.

Because when this hardening grouting material poured into, as described above, ground and the gap of expanding between grouting bolt 1A were sealed, spilt so can suppress hardening grouting material, can be as shown in Figure 9, the hardening grouting material that obtains expectation really pours into zone 19.And because after grouting finishes, the grouting bolt 1A that expands still gives over to lock bolt, so even there is spring, the sealing function after still can expanding by above-mentioned bulge 3, prevent that hardening grouting material from flowing out, thereby can not have the improvement that required foundation region is realized on error ground.

Though pouring into of hardening grouting material can be undertaken by the hardening grouting material that pours into single kind, but, also can switch the kind of hardening grouting material on the way, pours into multiple hardening grouting material.Combination example as multiple hardening grouting material, can enumerate and pouring into the good hardening of permeability grouting material at first, promote, though it is not good to pour into permeability after pouring on a large scale, the hardening grouting material that intensity after the sclerosis is high, intensity around seeking to improve perhaps, exists under the situation of spring, pour into the short hardening grouting material of firm time (gelling time) earlier, spring is suppressed, pours into the long hardening grouting material of firm time again, seek infiltration on every side.

Though in above-mentioned example, pours into the 9A of interruption-forming portion and be provided with maintenance sleeve 10, yet the structure that maintenance sleeve 10 is not set also is feasible.That is, can adopt the above-mentioned structure that keeps sleeve 10 is not set.Yet preferably select following structure for use: maintenance sleeve 10 is set so that adjust the formation pressure that pours into mouthful 7 (with reference to Fig. 8 A and Fig. 8 C) easily, when forming pressure greater than set pressure, 10 fragmentations of maintenance sleeve are so that embrittlement portion is subjected to big strength effect.

Figure 10 is the accompanying drawing that shows other example that pours into the interruption-forming step, and symbol only shows the portion that wants.

In the present embodiment, at Fig. 5～Fig. 7 A, the boring step that 7B is illustrated, after inserting step and the expansion step, the inlet sleeve 2 of self-expanding grouting bolt 1A unloads lower nip flexible pipe 17 and accessory 16, replace, bar-shaped drilling tool 6 is inserted in the grouting bolt 1A that expands from inlet sleeve 2, the actuating device 20 that activates drilling tool 6 is installed to inlet sleeve 2, leading section by 6 pairs of expansion grouting of drilling tool bolt 1A applies ejection, make and pour into mouthful 7 openings. so, even can't form under mouthfuls 7 the situation of pouring into pouring into the 9A of interruption-forming portion with the mode of rising pressure, still can inerrably form really pour into mouthfuls 7. and, pour into the interruption-forming step if carry out this kind, do not pour into the 9A of interruption-forming portion even set in advance, still can be by after expansion step, pour into mouth 7 with drilling tool 6 mandatory formation, carry out the step that after this pours into shown in Figure 9.

Except simple clava, can use the sharp keen clava of front end, bore shape clava etc. as drilling tool 6, can use hydraulic means etc. as actuating device.Using under drilling tool 6 situations, though with in the easy insertion expansion grouting bolt 1A, the opening shaft of rearward end is to magnifying better, but, under the less situation of the opening of the grouting bolt 1A rearward end that expands, also can after expansion step, cut off rearward end, enlarged openings portion inserts drilling tool 6.Particularly, if form threaded portion 5 at inlet sleeve 2, the actuating devices 20 such as hydraulic jack that can be spirally connected at inlet sleeve 2 places bear reaction force, can correctly act on drilling tool 6 with being pressed into strength.

Figure 11 is the sectional drawing that shows second embodiment that pours into interruption-forming portion.

The 9B of the interruption-forming portion that pours into of the present embodiment is pre-formed by key 21 obturations and pours into mouthfuls 7 in bulge 3.

Pour under the 9B of the interruption-forming portion situation above-mentioned, if for example the little material of material that constitutes bulge 3 with ductility constitutes this key 21, make key 21 and bulge 3 integrated by welding etc., can be when bulge 3 expands, concentrated stress is in key 21 parts, when further rising pressure, break, make to pour into mouthful 7 openings.And, making the formula that is screwed into of unloading lower bolt 21, or using pressure (hydraulic) water under the supply situation of interior pressure with pressure in required, make key 21 and bulge 3 integrated by water-soluble bonding agent, weaken gluing power with supplied with pressure (hydraulic) water, make it to break.The 9B of the interruption-forming portion that pours into of this key 21 not only is located at the leading section of bulge 3 easily, also is located at the close rear end or the pars intermedia of bulge 3 easily.

Figure 12 is the sectional drawing that shows the 3rd embodiment that pours into interruption-forming portion.

The 9C of the interruption-forming portion that pours into of the present embodiment is provided with and is connected bulge 3 front ends, in fact can be because of the tubular cover material maintaining part 22 of interior pressure hole enlargement, with the front opening of lid material maintaining part 22 as pouring into mouthfuls 7, utilize by annular cover 23 be installed on cover material maintaining part 22 front ends lid material 24 obturations these pour into mouth 7.

Pour under the 9C of the interruption-forming portion situation above-mentioned, can make and cover material 24 and have depress the intensity of breaking in required, after bulge 3 expands, press in raising, this lid material 24 is broken, order pours into mouth 7 openings.Because this lid material 24 punctures by the illustrated drilling tool 6 of Figure 10 easily, be particularly suitable for illustrated other example that pours into the interruption-forming step of Figure 10 again so originally pour into the 9C of interruption-forming portion.

Figure 13 is the sectional drawing that shows the 4th embodiment that pours into interruption-forming portion.

The 9D of the interruption-forming portion that pours into of the present embodiment uses and identical maintenance sleeve 10 shown in Fig. 1～Fig. 4 A, 4B, and calking is installed and kept sleeve 10 to be pre-formed mouthfuls 7 the position of pouring at bulge 3 in correspondence, pours into mouth 7 with these maintenance sleeve 10 lockings.And, keeping the formation of sleeve 10 two ends to crack 12.

Pour under the 9D of the interruption-forming portion situation above-mentioned, when bulge 3 expands, suppress to keep the expansion of sleeve 10 calking mounting portions, make this part not enlarge expansion, other bulge 3 that expands, after this, press in further raising, by keeping sleeve 10 fragmentations, can make pouring into mouthful 7 openings.And, in order to reach the preceding blockings that pour into mouth 7 of maintenance sleeve 10 fragmentations really, also can keep pressing from both sides between sleeve 10 and the bulge 3 to establish to be used to seal the packing ring (not shown) that pours into mouth 7.The 9D of the interruption-forming portion that pours into of the present embodiment not only is located at the leading section of bulge 3 easily, also is located at the close rear end or the pars intermedia of bulge 3 easily.

Figure 14 shows expand second embodiment of grouting bolt of the present invention, omits the stereogram of pars intermedia, and Figure 15 is to use the packing component partial to apply and is used for making the key diagram that pours into the interior pressure situation of interruption-forming portion opening shown in Figure 14, and symbol only shows the portion that wants.

The expansion grouting bolt 1B of the present embodiment passes through joint cap 25 locking front ends, and a plurality of embedding keys 21 axially is set in the preformed 9B of the interruption-forming portion that pours into (with reference to Figure 15) that pours into mouth 7 at the pars intermedia of bulge 3 every appropriate intervals.This pours into the 9B of interruption-forming portion and presses in raising by the back of expanding at bulge 3, and key 21 is flicked, and makes to pour into mouth 7 openings, and this is with shown in Figure 11 identical.

And have under a plurality of as shown in figure 14 expansions grouting bolt 1B situations that pour into the 9B of interruption-forming portion, might because of interior depress that all pour into the 9B of interruption-forming portion pour into not opening simultaneously of mouthful 7 (with reference to Figure 15), each opening staggers period, the interior pressure from mouthful 7 ease that pour into of opening lost, so that the not every all situations of opening of mouth 7 that pour into take place.The ease of pressing in when preventing to pour into mouthful 7 openings is lost, and alternative only makes a part pour into mouthful 7 openings, with as shown in figure 15, uses packing member 26 parts to press better in applying.

Further be illustrated, at first, apply required interior pressure of bulge 3 expansions, shown in Fig. 7 B, bulge 3 is expanded.By this, extend in depression part 8, and the inner space of bulge 3 is expanded near circular.Under this state,, the front and back shown in Figure 15 pipe 27 (with the pipe that pours into of two packing members) that pours into packing member 26 is inserted in the grouting bolt 1B that expands from inlet sleeve 2 shown in Figure 14.

Packing member 26 is can be by the bag of pressure fluids such as for example pressure (hydraulic) water expansion.Pour into the 9B of interruption-forming portion and be located between the two packing members 26, make it to expand, pour into the 9B of interruption-forming portion and be located in therebetween, thereby the axial front and back of the grouting bolt 1B that expands are sealed by apply fluid pressure to two packing members 26.Under this state, pour into pipe 27 certainly pressure fluid be conducted to two packing members, 26 folded zones, with the part to the grouting bolt 1B pressurization of expanding, thereby positively and optionally make two packing members, 26 folded positions the 9B of the interruption-forming portion that pours into pour into mouthful 7 openings.And, by removing the pressure of packing member 26, pour into pipe 27 moving axially easily along the grouting bolt 1B that expands with packing member 26.

If as above-mentioned, make and pour into mouthful 7 openings from a plurality of 9B of interruption-forming portion selectivity that pour into, promptly not only can positively make all a plurality of mouthful 7 openings that pour into, and selectively only make a part pour into mouthful 7 openings, perhaps, pour into mouth 7, pour into different types of hardening grouting material via difference.For example, at mouthful 7 openings that pour into that only make near leading section, pour into after the hardening grouting material, when it is washed when unhardened, or boring is removed after sclerosis with the hardening grouting material in the grouting bolt 1B that expands, secondly, make mouthful 7 openings that pour into, according to need, arrange obstruction at leading section near rearward end, then by pouring into different hardening grouting materials, the different types of hardening grouting of axially pouring into of bolt 1B material can be in the milk along expanding.And, also can the inadequate bulge 3 that expand further be expanded by using the pressurized of above-mentioned packing member 26.

Figure 16 shows expand the 3rd embodiment of grouting bolt of the present invention, omits the stereogram of pars intermedia, and symbol only shows the portion that wants.

The front end of the expansion grouting bolt 1C of the present embodiment has boring burr-drill 28.

As if above-mentioned boring burr-drill 28 is set, can use this boring burr-drill 28, one side forms boring 15 (with reference to Fig. 5), and the grouting bolt 1C that simultaneously will expand simultaneously inserts this boring 15, thereby, can shorten the activity duration.

Below, to the present invention expand grouting bolt the 4th embodiment be illustrated.

Figure 17 shows the expand accompanying drawing of the 4th embodiment of grouting bolt of the present invention, Figure 18 A and Figure 18 B are the sectional drawings of the rearward end (supply side of hardening grouting material) of expansion shown in Figure 17 grouting bolt and leading section (boring deep side), and Figure 19 A～Figure 19 C is each sectional drawing of A-A ', B-B ', C-C ' shown in Figure 18 A and Figure 18 B.

Shown in Figure 17 and Figure 18 A, 18B, the expansion of the present embodiment grouting bolt 1D has bulge 3, and the 9E of the interruption-forming portion that pours into that is made of with sleeve 29 and the inaccessible lid 30 that covers with sleeve 29 front ends lid.

And, front end sleeve 31 and rear end sleeve 32 calking respectively are installed on the leading section and the rearward end of bulge 3. at front end sleeve 31, the lid that pours into the 9E of interruption-forming portion is integrated with it by weld portion 33 with the rearward end of sleeve 29, at rear end sleeve 32 places, inlet sleeve 2 is integrated with it by weld portion 34. and the example illustrated with Fig. 1～Fig. 4 A, 4B is identical, the inboard of inlet sleeve 2 is formed with the member of threaded portion 5. and, Reference numeral 35 expression protuberances, this protuberance are used for installing and are used for flat board 36 (with reference to Figure 28 A) that expand grouting bolt 1D and ground are fixed.

By sectional drawing shown in Figure 19 B as can be known, the bulge 3 of the expansion of the present embodiment grouting bolt 1D is the C font roughly, and it has depression part 8, and this depression part 8 is to constitute like this: inwardly side pressure falls into the part of pipe vertically, is absorbed in the pipe thereby this part is pressed.Therefore, can be depression part 8 is past extrapolated by the inner space that is pressed on bulge 3 in applying, thus make bulge 3 expanded radiallys.

Shown in Figure 19 A, for avoid in applying, being pressed on expand when the grouting bolt 1D should in press and spill the outside, and be the inhibition hole enlargement, the space outerpace that the depression part 8 of the rearward end of bulge 3 and rear end sleeve are 32 is filled by weld portion 37.And shown in Figure 19 C, for suppressing hole enlargement, the depression part 8 of bulge 3 leading sections and the space outerpace between the front end sleeve 31 are filled by weld portion 38.

The be in the milk material of bolt 1A of the illustrated expansion of the constituent material of the bulge 3 of the expansion of the present embodiment grouting bolt 1D and Fig. 1～Fig. 4 A, 4B is identical.

The lid of expansion grouting bolt 1D leading section that is installed on the present embodiment is with sleeve 29 and to cover 30 9E of the interruption-forming portion that pours into that constitute are one-body molded bodies, the wall thickness that lid usefulness sleeve 29 and lid are 30 is very thin, can make this thinner wall section fragmentation by interior pressure, thereby make and cover 30 and separate with sleeve 29, will pour into mouth 7 with leading section and open at the grouting bolt 1D that expands with lid.

Can use with above-mentioned bulge 3 identical materials and make lid with sleeve 29 and cover 30, and can constitute, particularly, press higher interior pressure in required, make and cover 30 and use sleeve 29 separation to get final product from lid by expanding than bulge 3 by pressing in set.And, also be not limited to welding with the form that is connected of bulge 3.

Figure 20～Figure 22 demonstration can be used for the present invention, by the sectional drawing of the not isostructure example of covering the interruption-forming portion that pours into that constitutes with sleeve and lid.

The 9E of the interruption-forming portion that pours into of Figure 20 has synthetic resin cap 30, and these synthetic resin cap 30 outer walls are provided with screw thread, and this screw thread is used to be screwed onto inwall and is provided with the metal system lid of screw thread with in the sleeve 29.The 9E of the interruption-forming portion that pours into of Figure 21 has synthetic resin cap 30, and the outer wall of this synthetic resin cap 30 is provided with and is used for insert cover with the screw thread of sleeve 29, so as to prevent because of the collision in carrying or the operation way etc. caused to covering 30 damage.The 9E of the interruption-forming portion that pours into of Figure 20 and Figure 21 all utilizes and constitutes flexibility, elasticity cover 30 synthetic resin, makes to cover 30 and separate with sleeve 29 with covering.Figure 22 does very thinly with the leading section wall thickness of sleeve 29 synthetic resin cap that the outside is provided with screw thread, at internal configurations spheroid 39, makes this spheroid 39 outside that flies out by interior pressure, pours into mouthfuls 7 and opens thereby make.Can use for example conducts such as polyvinyl chloride, ABS (acrylonitrile-butadiene-styrene (ABS)) resin, PET (poly-terephthaldehyde's diethylester), Merlon to constitute the synthetic resin of above-mentioned Figure 20～lid 30 shown in Figure 22.

Use is characterised in that with sleeve 29 and of expansion grouting bolt 1D of covering 30 9E of the interruption-forming portion that pours into that constitute by lid: be modified to easily and can connect 2 or 3 to come up in order to prolongation.Use Figure 23～Figure 25 A, 25B that this feature is illustrated.

Figure 23 connects to prolong the sectional drawing that the back constitutes the expansion grouting bolt leading section of rear end side, Figure 24 connects to prolong the sectional drawing that the back constitutes the expansion grouting bolt rearward end of front, Figure 25 A and Figure 25 B are the key diagrams that can prolong the connecting portion of the grouting bolt that expands, Figure 25 A is the sectional drawing of the connecting portion of 2 grouting bolts that expand, and Figure 25 B is the outside drawing of the connecting portion of 2 grouting bolts that expand.

As shown in figure 23, at front end sleeve 31 places of the expansion grouting bolt 1D of Figure 17 the prolongation front end sleeve 40 that is provided with screw thread is installed by weld portion 33, be formed on to connect and prolong the rear end side expansion grouting bolt 1D ' that constitutes rear end side afterwards, alternative cover is with sleeve 29 and cover 30. on the other hand, as shown in figure 24, rear end sleeve 32 places at another grouting bolt 1D that expands, by weld portion 34 install be provided with and above-mentioned prolongation with the prolongation of the corresponding screw thread of the screw thread of front end sleeve 40 with rear end sleeve 41, be formed on to connect and prolong the front expansion grouting bolt 1D that constitutes front afterwards ", be substituted into muzzle tube 2.

Shown in Figure 25 A, prolong with front end sleeve 40 and prolongation rear end sleeve 41 by screwing togather, rear end side expansion grouting bolt 1D ' and front expansion grouting bolt 1D " connect into the state that is connected the inner space by stream 42,43, constitute a succession of expansion grouting bolt (not shown).

Use is modified to the prolongation that not only can realize 2 connections by lid easily with the sleeve 29 and the expansion of covering 30 9E of the interruption-forming portion that pours into that the constitute bolt 1D that is in the milk, and can connect 3 with on prolong.

Specifically, the expansion grouting bolt 1D leading section that is installed to Figure 17 with front end sleeve 40 will be prolonged, with alternative cover with sleeve 29 and cover 30, to prolong with rear end sleeve 41 and be installed to same expansion grouting bolt 1D rearward end, to be substituted into muzzle tube 2 as prolonging with the intermediate expansion of the pars intermedia bolt part of being in the milk.And, can be by expand in Figure 23 and rear end side shown in Figure 24 grouting bolt 1D ' and the front grouting bolt 1D that expands " between more than one this intermediate expansion of configuration bolt part of being in the milk, to extend to required length.According to the present invention, can provide respectively and prolong with front end sleeve 40 and prolong that the two uses member as prolonging with rear end sleeve 41, and prolong operation and only need prolongations be spirally connected with rear end sleeve 41 with front end sleeve 40 and prolongation and get final product, so this operation can be carried out at the scene, the length before keeping in the conveyance before reaching the spot prolonging.

Below, in conjunction with Figure 26 A, 26B～Figure 30 illustrate use the illustrated expansion grouting bolt 1D of Figure 17 according to grouting method of the present invention.

Figure 26 A and Figure 26 B show to be installed on the routine sectional drawing of accessory structure that the grouting bolt that expands uses, Figure 27 shows that boring forms the accompanying drawing of step, Figure 28 A and Figure 28 B show that the grouting bolt that expands inserts the accompanying drawing of the inserting step of boring, Figure 28 A is the accompanying drawing that shows the expansion grouting bolt that inserts boring, Figure 28 B is an A-A ' sectional drawing among Figure 28 A, Figure 29 A and Figure 29 B are the accompanying drawings that shows the expansion step of the grouting bolt that expands, Figure 29 A is the accompanying drawing that is presented at the expansion grouting bolt that bulge expands in the boring, Figure 29 B is the A-A ' sectional drawing of Figure 29 A, Figure 30 shows to pour into the accompanying drawing of interruption-forming step, and is to show that applying higher interior the pressure makes the accompanying drawing that covers the state that separates.

At first, as shown in figure 27, form boring 15 in ground.Can use the boring brill etc. of the boring balladeur train of general use, 15 formation is used to hole.

After boring 15 formed, shown in Figure 28 A, by inserting from front (covering 30 sides), the grouting bolt 1D that will expand inserted above-mentioned boring 15, thereby inserts ground, and the grouting bolt 1D that wherein expands has flat board 36, and this flat board 36 is inserted into the position of protuberance 35.Under this state, shown in Figure 28 A and Figure 28 B, the bulge 3 of the grouting bolt 1D that expands or not, and has under the enough and to spare state between the inwall of bulge 3 and boring 15, inserts in the boring 15.

Then, shown in Figure 29 A, accessory 16 is installed at 2 places at the inlet sleeve, connects force feed flexible pipe (not shown) at these accessory 16 places, applies interior pressure in the grouting bolt 1D that expands.Should interiorly press and apply with fluid pressure.Though it also can be undertaken by gas-pressurizeds such as for example compressed air, but with the general easy fluid under pressure that applies big pressure, particularly pressure (hydraulic) water is better.

Shown in Figure 26 A, accessory 16 is the members with the portion of being screwed into 44, can be by this being screwed into the inlet sleeve 2 that portion 44 is screwed to Figure 17, thus be installed to the grouting bolt 1D that expands.Accessory 16 possesses and is used for pressure is infeeded supply hole 18 in the grouting bolt 1D that expands, and formation can connect force feed flexible pipe (not shown) being communicated with under these supply hole 18 states.The installation of accessory 16 can be carried out before the grouting bolt 1D that will expand inserts boring 15, also can carry out after insertion.And, shown in Figure 26 B, also can not use inlet sleeve 2, the accessory 16 ' of the portion of being screwed into 44 directly is not set in the 32 places welding of rear end sleeve.

Because shown in Figure 29 B, the grouting bolt 1D that expands makes its bulge 3 expanded radiallys by pressing in above-mentioned, closely connected in the inwall of boring 15, even so in boring 15, exist under the spring situation, but sealing still. and, even under the more fragile situation of ground, the grouting bolt 1 that expands still can obtain the bed knife of a certain degree by the expansion of its bulge 3 around.

The expansion of above-mentioned bulge 3 is carried out better to utilize than covering the 30 lower pressure of pressure that cover certainly with sleeve 29 separation.Do not finish if the bulge of grade 3 fully to expand, lid 30 separates with sleeve 29 from lid, presses from its peristome in promptly taking place and leaks, and must supply with than this and leak the big interior pressure (supply pressure (hydraulic) water) of value, causes being difficult to the operation of expanding.

After the bulge 3 expansion necessary amounts of grouting bolt 1D that will expand, by supplying with more high pressure, as shown in figure 30, make and cover 30 and separate with sleeve 29 with lid, at the front end of bolt 1D of being in the milk that expands, make to pour into mouth 7 and open.

After this, in removing according to need, press back (after discharging pressure (hydraulic) water), in installing or do not install under the situation of accessory 16, supply with the hardenings materials that are in the milk via force feed flexible pipe (not shown) sleeve 2 that enters the mouth certainly.This hardening grouting material was done explanation in the grouting method example of the expansion grouting bolt that uses first embodiment.

Because when pouring into this hardening grouting material, as above-mentioned, ground is sealed with the gap of expanding between the grouting bolt 1D, spill the outside so can suppress the hardening material that is in the milk, the material that hardening can be in the milk pours into 15 the deep of holing.And because after pouring into end, the grouting bolt 1D that expands also gives over to the rock bolting bolt, so even there is spring, the sealing of expansion that still can be by above-mentioned bulge 3, prevent that hardening grouting material from flowing out, thereby inerrably realize the improvement of required foundation region really.

Though in the present embodiment, pouring into of hardening grouting material can be undertaken by the hardening grouting material that pours into single kind, yet the also kind of the grouting of conversion hardening on the way material is to pour into multiple hardening grouting material.The existing explanation in the grouting method example of the expansion grouting bolt that uses first embodiment of the example combinations of multiple hardening grouting material.

Figure 31 is to use near the sectional drawing the driving workshop section in the construction of tunnel of grouting method of the present invention, and Figure 32 is the elevation of driving workshop section, and the 101st, expansion grouting bolt of the present invention, the 102nd, hardening grouting material pours into the zone, and the 103rd, driving workshop section face.

As shown, use the expand grouting method of grouting bolt 101 of the present invention to can be used for the reinforcement of base stabilizationization, near the ceiling portion the driving workshop section face 103 of driving workshop section face 103 in the construction of tunnel and the reinforcement etc. that constitutes the arch concrete foot of tunnel inwall.In construction of tunnel, the grouting bolt 101 that will expand immediately after excavation inserts the ground basal planes, pours into hardening grouting material, makes the base stabilizationization of having dug the tunnel, and makes and be about to dig the base stabilizationization of cutting.

The ground face of just having exposed through excavating easily takes place loosening.Therefore, easily when hardening grouting material pours into, near the inlet of the boring of inserting the grouting bolt 101 that expands, take place loosening, thereby the leakage of hardening grouting material takes place.

Yet, according to the present invention, can expand by bulge as above-mentioned, make the inner face of its closely connected boring, sealed.Again owing to also can seal spring simultaneously, so for need digging the construction of tunnel of cutting with foundation reinforcement repeatedly, its operating efficiency can be largely increased.

Claims

1. grouting bolt that expands, it has bulge, and this bulge has tubular form, can fluidly apply interior pressure from rearward end, expanded radially during pressure during fluidly applying; And by pressing the interruption-forming portion that pours into that pours into mouthful opening that makes in fluidly applying.

2. expansion as claimed in claim 1 grouting bolt, wherein, the inside side pressure of a part that bulge has vertically the pipe of plastically deformable falls into to form the structure of depression part.

3. expansion grouting bolt as claimed in claim 2, wherein, the grouting bolt that expands constitutes bulge at its leading section at least, pours into interruption-forming portion and has: the weld portion that is used to seal, its front end of allowing this bulge opens from the pressure swallow both sides of depression part, and can suppress hole enlargement; And embrittlement portion, it is located near the depression part this weld portion, splits by interior crushing, and makes to pour into a mouthful opening.

4. expansion as claimed in claim 3 grouting bolt wherein, pours into interruption-forming portion and has the maintenance sleeve, and its calking is installed on the bulge outside wall surface of the position of corresponding embrittlement portion, and fragmentation is broken embrittlement portion by interior pressure, pours into interruption-forming portion opening thereby make.

5. expansion grouting bolt as claimed in claim 2, wherein, pour into interruption-forming portion and have: pour into mouth, it is pre-formed in bulge; And key, its inaccessible this pours into mouth, makes this pour into a mouthful opening by interior pressure.

6. expansion grouting bolt as claimed in claim 2, wherein, pour into interruption-forming portion and have: pour into mouth, it is pre-formed in bulge; And the maintenance sleeve, its closely connected this pours into mouth, and calking is installed on the bulge outside wall surface, makes the bulge fragmentation by interior pressure, so that pour into interruption-forming portion opening.

7. expansion grouting bolt as claimed in claim 1, wherein, the sealing material is wound in the bulge outside wall surface.

8. expansion grouting bolt as claimed in claim 1, wherein, rearward end constitutes the inlet sleeve towards axially open.

9. expansion grouting bolt as claimed in claim 1 also is provided with the boring burr-drill at front end.

10. expansion grouting bolt as claimed in claim 2, wherein, pour into interruption-forming portion and have: lid is used sleeve, and it is installed on rearward end the leading section of bulge; And lid, its locking should lid with the front end of sleeve, and during applying, during pressure, separate with sleeve from this lid.

11. expansion grouting bolt as claimed in claim 10 also comprises the front end sleeve of the leading section that is installed on bulge, and the rearward end of lid with sleeve is installed on this front end sleeve.

12. expansion as claimed in claim 10 grouting bolt, wherein, lid is one-body molded with lid with sleeve, and the wall thickness of the connecting portion of the two forms thin than other position, and when during applying, pressing, this connecting portion fragmentation, lid separates with sleeve from covering.

13. expansion grouting bolt as claimed in claim 10, wherein, lid is made by synthetic resin, is mounted to bury in lid with in the sleeve.

14. expansion as claimed in claim 11 grouting bolt also comprises the rear end sleeve of the rearward end that is installed on bulge, in the rearward end of this rear end sleeve inlet sleeve towards axially open is installed.

15. expansion grouting bolt as claimed in claim 2, comprise and prolong the rear end side expansion grouting bolt part that is installed on the bulge front end with the front end sleeve, and prolong the front that is installed on the bulge rear end with the rear end sleeve grouting bolt part that expands, wherein expand grouting bolt part and front of rear end side expands the inner space of grouting bolt part via prolonging with the front end sleeve and prolonging with rear end sleeve and connection continuously.

16. expansion grouting bolt as claimed in claim 15, wherein, expand between grouting bolt part and the front expansion grouting bolt part in rear end side, connect at least one intermediate expansion grouting bolt part, the prolongation of this intermediate expansion grouting bolt part is with the front end sleeve and prolong front end and the rear end of being located at bulge with the rear end sleeve respectively.

17., wherein, pour into interruption-forming portion by than making the bulge higher pressure of required minimum pressure that expands make and pour into a mouthful opening as arbitrary described expansion grouting bolt in the claim 1 to 16.

18. a grouting method comprises;

Use has bulge and pours into the expansion grouting bolt of interruption-forming portion, wherein bulge has the tubulose that can press in rearward end fluidly applies, expanded radially when pressing in fluidly applying pours into interruption-forming portion and pours into a mouthful opening by pressing to make in fluidly applying;

The grouting bolt that should expand inserts in the ground;

Be pressed on the grouting bolt that expands in fluidly applying, bulge is expanded, and make and pour into a mouthful opening;

To the grouting bolt supplying hardening grouting material that expands; And

Via the mouth that pours into of opening, hardening is in the milk around material pours into.

19. grouting method as claimed in claim 18, wherein, the interruption-forming portion that pours into of expansion grouting bolt has calking and is installed in the bulge outside wall surface, split so that pour into the sleeve of mouthful opening by interior crushing, after bulge is expanded, apply higher interior the pressure, make the sleeve fragmentation, so that pour into a mouthful opening.

20. grouting method as claimed in claim 18, wherein, the interruption-forming portion that pours into of the grouting bolt that expands has: lid is used sleeve, and the end is installed on the leading section of bulge thereafter; And lid, its locking should lid with the front end of sleeve, and during applying, during pressure, separate with sleeve from this lid; After bulge is expanded, apply higher interior the pressure, lid is separated, so that pour into a mouthful opening with sleeve from lid.

21. a grouting method comprises:

Use possesses the expansion grouting bolt of bulge, and this bulge forms and can fluidly apply interior tubulose of pressing towards the inlet sleeve of axially open via being located at rearward end, and by pressing expanded radially in fluidly applying;

The grouting bolt that should expand inserts in the ground;

Being pressed on the grouting bolt that expands in fluidly applying expands bulge;

The inlet sleeve of self-expanding grouting bolt inserts drilling tool, forms on the grouting bolt that expands and pours into mouth;

To the grouting bolt supplying hardening grouting material that expands; And

Via pouring into mouth, hardening is in the milk around material pours into.

22. grouting method as claimed in claim 18 wherein, uses the expansion grouting bolt that has the boring burr-drill at its front end, in boring, the grouting bolt that should expand inserts boring.

23. a grouting method comprises:

Use a kind of expansion grouting bolt, this expansion grouting bolt has: form the tubulose that can press and the body of expanded radially during pressure in fluidly applying from rearward end fluidly applies in, and lid and sleeve, lid separates with sleeve when pressing in fluidly applying, the sleeve that also has lid, this sleeve is installed on the leading section of body;

This expansion grouting bolt is inserted the boring that is formed at ground;

Be pressed on the grouting bolt that expands in fluidly applying, make this volume expansion;

Fluidly apply higher interior the pressure, the lid of leading section is separated;

Supply with hardening grouting material in the grouting bolt that expands, thereby the hardening material that is in the milk is poured in the boring from leading section.

24., wherein, switch the kind of the hardening grouting material that being supplied to the grouting bolt that expands in operation as arbitrary described grouting method in the claim 18 to 23.