CN105781596A - Flexible support and supporting method - Google Patents
Flexible support and supporting method Download PDFInfo
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- CN105781596A CN105781596A CN201610125446.6A CN201610125446A CN105781596A CN 105781596 A CN105781596 A CN 105781596A CN 201610125446 A CN201610125446 A CN 201610125446A CN 105781596 A CN105781596 A CN 105781596A
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- Prior art keywords
- flexible pipe
- flexible
- connection end
- port device
- slip casting
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- 238000000034 method Methods 0.000 title abstract description 29
- 230000008093 supporting effect Effects 0.000 title abstract description 18
- 238000007569 slipcasting Methods 0.000 claims description 49
- 230000000694 effects Effects 0.000 claims description 31
- 239000011440 grout Substances 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 210000000003 hoof Anatomy 0.000 claims description 6
- 239000011435 rock Substances 0.000 abstract description 20
- 238000007789 sealing Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 6
- 210000003205 muscle Anatomy 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 210000004911 serous fluid Anatomy 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010410 reperfusion Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/02—Non-telescopic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The embodiment of the invention discloses a flexible support and a supporting method and relates to the technical field of surrounding rock supporting. The flexible support comprises a hose and a grouting opening device, wherein the grouting opening device is in sealing connection with the end of the hose. The hose is provided with an exhaust device. A cavity in the hose is internally provided with a tensile flexible wire in a penetrating mode. The ends of the tensile flexible wire are fixed to the grouting opening device, or the two ends of the tensile flexible wire are connected with each other. The supporting method comprises the steps of conducting supporting by using the support. The flexible support and the supporting method are suitable for surrounding rock supporting.
Description
Technical field
The present invention relates to support technology field, particularly relate to a kind of flexible support and method for protecting support.
Background technology
In the support supporting of underground engineering particularly mine laneway, mine laneway secondary supporting and mountain tunnel through frequently with rigid metal bracket support, including U-shaped steel bracket, flange beam stand and steel pipe concrete bracket etc., its common feature is:
(1) support is in ground machine-shaping, and point many segmental arcs are transported to underground, assemble in job site, and mounting process is complicated.
(2) support wire density is big, and installation difficulty is big, it is generally required to first set up scaffold to carry out mounting bracket again, installation rate is slow, and labor strength is high.
(3) support major part is steel, and support overall weight is big, and support is relatively costly.
Summary of the invention
On the one hand, the embodiment of the present invention provides that a kind of cost is low, is easily installed and flexible support that supporting effect is good.The flexible support that the embodiment of the present invention provides, including: flexible pipe and grouting port device；Wherein,
Described grouting port device is connected with the end seals of described flexible pipe；
Described flexible pipe is provided with exhaust apparatus；
Being equipped with tension flexible cord in cavity in described flexible pipe, the termination of described tension flexible cord is fixed on described grouting port device, or the two ends of described tension flexible cord interconnects.
Alternatively, described flexible support be shaped as closed supports；Described grouting port device includes connection end and the slip casting termination being arranged on described connection end；Wherein,
Described connection end includes the first end of the first link and the second link, the first link and described flexible pipe and is tightly connected, and the second end of the second link and described flexible pipe is tightly connected；
The parts of termination for fixing described tension flexible cord it are provided with in described first link and/or the second link.
Alternatively, described flexible support is shaped as non-close support, and described grouting port device includes the first grouting port device and the second grouting port device；
First grouting port device includes the first connection end and the slip casting termination being arranged on described first connection end；One end of described first connection end is link, and the other end is blind end；The link of described first connection end and the first end of described flexible pipe are tightly connected；The parts of termination for fixing described tension flexible cord one end it are provided with in described first connection end；
Second grouting port device includes the second connection end and the slip casting termination being arranged on described second connection end；One end of described second connection end is link, and the other end is blind end；The link of described second connection end and the second end of described flexible pipe are tightly connected；The parts of termination for fixing the described tension flexible cord other end it are provided with in described second connection end.
Alternatively, it is provided with self-enclosed structure in described grouting port device；Wherein,
Described self-enclosed structure includes traction element, connection member and packaged unit；
Described traction element is positioned at described slip casting termination, and described packaged unit is in described connection end and can be closed by the path between internal and described for described slip casting termination connection end inside, and described connection member connects described traction element and packaged unit；
During slip casting, serosity promotes described traction element internal mobile to slip casting termination under pressure, traction element promotes described packaged unit that from closed state, the path between internal and described for described slip casting termination connection end inside is become conducting state by described connection member, and serosity is injected in flexible pipe through described traction element；After slip casting, packaged unit resets under the effect of traction element and connection member, is again closed by the path between internal and described for described slip casting termination connection end inside.
Alternatively, described flexible support also includes pressure relief device, and described pressure relief device is arranged on described grouting port device.
Alternatively, described exhaust apparatus includes body, has steam vent, the size being sized larger than the port of export of described steam vent arrival end in described body interior, is provided with stopper in steam vent；
The end of the arrival end of steam vent is provided with reticulate body, and the periphery of arrival end is provided with agnail, and the periphery of the port of export is provided with flange；
The arrival end of described steam vent is positioned at described flexible pipe, and the port of export is positioned at outside described flexible pipe.
Alternatively, being laid with tinsel in the sidewall of described flexible pipe, the agnail of described arrival end periphery is corresponding with the described tinsel laid in the sidewall of described flexible pipe；The flange of the port of export periphery of described steam vent is close to the outer wall of described flexible pipe.
Alternatively, described flexible pipe is that sidewall is laid with flexible pipe wiry, longitude and latitude webmaster or pvc pipe.
Alternatively, described closed supports includes circle, ellipse or the shape of a hoof: described non-close support includes Semicircular arched；
Be perfused with serosity by described grouting port device in described flexible pipe, described grout curing after, described flexible support becomes rigid support.
Alternatively, described traction element is annulus or plate with holes；Described connection member is connecting rod；Described packaged unit is circular steel plate.
Preferably, being arranged with spring in described connecting rod, one end of described spring can lean with described traction element, and the other end can lean with stopper；Wherein, stopper is prevented from the cavity that traction element enters within connection end；Stopper is positioned at the position near the cavity within connection end, the slip casting termination.
A kind of flexible support that the embodiment of the present invention provides, adopts flexible pipe as stake body, and cost is low, it is simple to transport and installing, by grouting port device inject in described flexible pipe grout curing after can play the effect of rigid protection；The tension flexible cord worn in cavity in described flexible pipe, as built-in muscle after grout curing, it is possible to increase the radial direction inflection moment of flexure of flexible support and tangential bearing capacity, also acts as arc length in fixing flexible support simultaneously, controls the effect of rack forming.
On the other hand, the embodiment of the present invention provides a kind of cost method for protecting support low, easy-to-install.The method for protecting support that the embodiment of the present invention provides, including step:
By the flexible pipe of predetermined length in operating position first one-step forming；
Serosity is injected at described inside hose by grouting port, described flexible pipe bulges under the pressure effect of serosity, the gas of described inside hose is expelled to outside described flexible pipe by the exhaust apparatus being arranged on described flexible pipe simultaneously, and after filling serosity in described flexible pipe, described exhaust apparatus is closed；
Continuing to inject serosity at described inside hose, described flexible pipe is under the effect of slurry pressure, and country rock is actively applied pressure by flexible pipe expansion；
After the pressure of described inside hose reaches predetermined pressure, described grouting port is closed；
The grout cures injected in described flexible pipe.
Alternatively, before by the flexible pipe of predetermined length one-step forming at the beginning of operating position, described method includes:
Tension flexible cord is worn in described flexible pipe；
The termination of described tension flexible cord is fixed on grouting port device, or the two ends of described tension flexible cord is interconnected；
The end seals of grouting port device with described flexible pipe is connected.
Alternatively, described by the flexible pipe of predetermined length, in operating position, first one-step forming includes: the flexible pipe of predetermined length preliminarily forms the shape of a hoof, circle, ellipse or Semicircular arched in operating position.
Alternatively, described continuation injects serosity at described inside hose, and described flexible pipe is under the effect of slurry pressure, and country rock is actively applied pressure by flexible pipe expansion, including:
Continuing to inject serosity at described inside hose, described flexible pipe is under the effect of slurry pressure, and country rock is actively applied pressure by arc flexible pipe.
Alternatively, described method for protecting support, also include:
When described inside hose slip casting, if the pressure of inside hose exceedes predetermined pressure, carry out pressure release by pressure relief device；And/or
Completing in described inside hose slip casting, after described grouting port is closed, before the grout cures of described soft casing pack, surrouding rock deformation is compressed described flexible pipe and is caused, when inside hose pressure raises, carrying out pressure release by pressure relief device.
Alternatively, it is laid with tinsel in the sidewall of described flexible pipe；Described exhaust apparatus includes body, has steam vent, the size being sized larger than the port of export of described steam vent arrival end in described body interior, is provided with stopper in steam vent；The end of the arrival end of steam vent is provided with reticulate body, and the periphery of arrival end is provided with agnail, and the periphery of the port of export is provided with flange；
Before wearing tension flexible cord in described flexible pipe, described method also includes:
Utilize the agnail of the arrival end periphery of the steam vent of described exhaust apparatus, pierce through the sidewall of flexible pipe, the arrival end making steam vent enters in described flexible pipe, the agnail of described arrival end periphery is corresponding with the described tinsel laid in the sidewall of described flexible pipe, and the flange of the port of export periphery of steam vent is close to the outer wall of described flexible pipe.
The method for protecting support that the embodiment of the present invention provides, adopts flexible pipe as stake body, and cost is low, it is simple to transport and installing, by grouting port device inject in described flexible pipe grout curing after can play the effect of rigid protection.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of flexible support embodiment one of the present invention；
Fig. 2 is the structural representation of grouting port device in the embodiment of the present invention one；
Fig. 3 is the structural representation that the self-enclosed structure in grouting port device is in open mode；
Fig. 4 is the structural representation that the self-enclosed structure in grouting port device is in closed state；
Fig. 5 is the sectional view of exhaust apparatus in the embodiment of the present invention；
Fig. 6 is the upward view of exhaust apparatus in the embodiment of the present invention；
Fig. 7 is the structural representation of another kind of exhaust apparatus in the embodiment of the present invention；
Fig. 8 is that in flexible support embodiment of the present invention, schematic diagram arranged by exhaust apparatus；
Fig. 9 is the structural representation of pressure relief device in flexible support embodiment of the present invention；
Figure 10 is the structural representation of flexible support embodiment two of the present invention；
Figure 11 is the structural representation of the first grouting port device in flexible support embodiment two of the present invention；
Figure 12 is the schematic flow sheet of method for protecting support embodiment of the present invention；
By the shape after the flexible pipe of predetermined length one-step forming at the beginning of operating position in Figure 13 and Figure 14 respectively method for protecting support embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
It will be appreciated that described embodiment a part of embodiment that is only the present invention, rather than whole embodiment.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Flexible support embodiment of the present invention, including: flexible pipe and grouting port device；Wherein, described grouting port device is connected with the end seals of described flexible pipe；Described flexible pipe is provided with exhaust apparatus；Being equipped with tension flexible cord in cavity in described flexible pipe, the termination of described tension flexible cord is fixed on described grouting port device, or the two ends of described tension flexible cord interconnects.
Described flexible pipe can be laid with flexible pipe wiry for sidewall, be alternatively longitude and latitude webmaster or pvc pipe etc..
The flexible support of the embodiment of the present invention can be closed supports or non-close support.Described closed supports can include circle, ellipse or the shape of a hoof etc.: described non-close support can include Semicircular arched, three-core arch form etc..
Be perfused with serosity by described grouting port device in described flexible pipe, described grout curing after, described flexible support becomes rigid support.
Flexible support embodiment of the present invention, adopts flexible pipe as stake body, and cost is low, it is simple to transport and installing, by grouting port device inject in described flexible pipe grout curing after can play the effect of rigid protection；The tension flexible cord worn in cavity in described flexible pipe, as built-in muscle after grout curing, it is possible to increase the radial direction inflection moment of flexure of flexible support and tangential bearing capacity, also acts as arc length in fixing flexible support simultaneously, controls the effect of rack forming.Fig. 1 is the structural representation of flexible support embodiment one of the present invention.Referring to Fig. 1, the present embodiment flexible support generally circular in shape, comprising: flexible pipe 1 and grouting port device 2；Wherein, described grouting port device 2 is connected with the end seals of described flexible pipe 1；Described flexible pipe 1 is provided with exhaust apparatus 3；Being equipped with tension flexible cord 4 in cavity in described flexible pipe 1, the termination of described tension flexible cord 4 is fixed on described grouting port device 2, or the two ends of described tension flexible cord 4 interconnects.
In the present embodiment, be perfused with serosity by described grouting port device in described flexible pipe, described grout curing after, described flexible support becomes rigid support.Serosity is the pumpable micro-expansibility concrete of C40.
The present embodiment, available grouting equipment by described grouting port device to reperfusion serosity in flexible pipe.Grouting equipment, except concrete pump, also can have the equipment such as hydraulic pump, oil pressure pump.
The embodiment of the present invention, adopts flexible pipe as stake body, and cost is low, it is simple to transport and installing, by grouting port device inject in described flexible pipe grout curing after can play the effect of rigid protection；The tension flexible cord worn in cavity in described flexible pipe, as built-in muscle after grout curing, it is possible to increase the radial direction inflection moment of flexure of flexible support and tangential bearing capacity, also acts as arc length in fixing flexible support simultaneously, controls the effect of rack forming.
In the present embodiment, described flexible pipe 1 is diameter 200mm, is laid with steel wire in inwall；Described tension flexible cord 4 is the steel strand wires of 22mm for one or more diameter.
Fig. 2 is the structural representation of grouting port device in the present embodiment.Referring to Fig. 2, in the present embodiment, described grouting port device 2 includes connection end 21 and the slip casting termination 22 being arranged on described connection end；Wherein, described connection end 21 includes the first link 211 and the second link 212, and the first end of the first link 211 and described flexible pipe 1 is tightly connected, and the second end of the second link 212 and described flexible pipe 1 is tightly connected；The parts 213 of termination for fixing described tension flexible cord 4 it are provided with in described first link 211 and/or the second link 212.The parts 213 of the termination of fixing described tension flexible cord 4 can be post or hook, can be one and be alternatively two or more.
Alternatively, the certain groove in surface of the first link 211 and/or the second link 212, groove shape can for having rectangle, triangle, arc, it is simple to is tightly fastened with the termination of flexible pipe, it is prevented that serosity seepage.
The connection end 21 of grouting port device 2 and slip casting termination 22 can straight tubes, it is also possible to being bend pipe, its cross section can also be rectangle, square, triangle and arc etc..Slip casting termination 22 internal cavity can be parallel pipeline, it is also possible to taper, circle, trapezoidal, notch cuttype or have the irregularly shaped of sealing process.
Fig. 3 is the structural representation that the self-enclosed structure in grouting port device is in open mode；Fig. 4 is the structural representation that the self-enclosed structure in grouting port device is in closed state.
Referring to Fig. 3 and Fig. 4, in the present embodiment, in described grouting port device 2, it is provided with self-enclosed structure；Wherein,
Described self-enclosed structure includes traction element 23, connection member 24 and packaged unit 25；Described traction element 23 is positioned at described slip casting termination 22, described packaged unit 25 is in described connection end 21 and can be closed by the path between internal and described for described slip casting termination 22 connection end 21 inside, and described connection member 24 connects described traction element 23 and packaged unit 25；During slip casting, serosity promotes described traction element internal mobile to slip casting termination under pressure, and traction element promotes described packaged unit that from closed state, the path between internal and described for described slip casting termination connection end inside is become conducting state by described connection member；After slip casting, packaged unit resets under the effect of traction element and connection member, is again closed by the path between internal and described for described slip casting termination connection end inside.Can manually force in traction element, pull packaged unit to reset by connection member, it is possible under the effect of return spring force, make packaged unit automatically reset.
Alternatively, stopper 26 prevents traction element 23 from entering in the cavity within connection end 21.Stopper 26 may be located at the position in slip casting termination 22 near the cavity within connection end 21.
Alternatively, described traction element is annulus or plate with holes；Described connection member is connecting rod；Described packaged unit is circular steel plate.
Preferably, being arranged with spring in described connecting rod, one end of described spring can lean with described traction element, and the other end can lean with stopper.
During slip casting, grouting pressure acts on packaged unit makes packaged unit unlatching carry out slip casting, after slip casting terminates, acts on the grouting pressure on packaged unit and disappears, and packaged unit can automatically reset by means of the pressure of the serosity that described spring and inside hose have been injected into；Wherein, stopper is prevented from the cavity that traction element enters within connection end；Stopper is positioned at the position near the cavity within connection end, the slip casting termination.
It is of course also possible to do not install described spring, after slip casting terminates, acting on the grouting pressure on packaged unit and disappear, packaged unit can automatically reset only by means of the pressure of the serosity that described inside hose has been injected into.
Alternatively, in another embodiment of grouting port device 2, one-way cock is set in grouting port device 2, open check valve door during slip casting, after reaching slip casting termination condition, close one-way cock and prevent serosity seepage.
Fig. 5 is the sectional view of exhaust apparatus in the embodiment of the present invention；Fig. 6 is the upward view of exhaust apparatus in the embodiment of the present invention.
Referring to Fig. 5 and Fig. 6, in the present embodiment, described exhaust apparatus 3 includes body 31, has steam vent 32, the size being sized larger than the port of export 322 of described steam vent 32 arrival end 321, be provided with stopper 33 in steam vent 32 inside described body 31；The end of the arrival end 321 of steam vent is provided with reticulate body 34, and the periphery of arrival end 321 is provided with agnail 35, and the periphery of the port of export 322 is provided with flange 36；The arrival end 321 of described steam vent 32 is positioned at described flexible pipe 1, and the port of export 322 is positioned at outside described flexible pipe 1.
In the present embodiment, can being laid with tinsel in the sidewall of described flexible pipe 1, the agnail 35 of described arrival end periphery is corresponding with the described tinsel laid in the sidewall of described flexible pipe 1；The flange 36 of the port of export periphery of described steam vent 32 is close to the outer wall of described flexible pipe.
Flange 36 has and prevents exhaust apparatus entirety to be driven into the function in flexible pipe, has the effect of closure exhaust apparatus 3 and the gap of flexible pipe 1 simultaneously.Agnail 35 can penetrate hose wall under the effect of knocking, and self barb structure can be stuck on the steel wire laid in hose wall, it is prevented that under grouting pressure, exhaust apparatus 3 and flexible pipe 1 depart from.
Fig. 7 is the structural representation of another kind of exhaust apparatus in the embodiment of the present invention.This exhaust apparatus 3 is T-type structure, and it is made up of connection end 51a and steam vent 52a.Connection end 51a and flexible pipe are tightly connected, it is prevented that serosity seepage, and steam vent 52a major function discharges intracavity gas and thin pulp.Steam vent 52a structure can take the self-enclosed structure similar with grouting port device 2.
Fig. 8 is that in flexible support embodiment of the present invention, schematic diagram arranged by exhaust apparatus.Referring to Fig. 8, exhaust apparatus 3 is positioned at flexible support top, arranges according to certain rule, the gas in flexible support cavity and part thin pulp is discharged when being mainly used in slip casting, cavity blocks steam vent in time after filling, it is prevented that serosity oozes out and spills, and keeps the grouting pressure in flexible pipe cavity.
Fig. 9 is the structural representation of pressure relief device in flexible support embodiment of the present invention.Referring to Fig. 9, in the present embodiment, described flexible support also includes pressure relief device 5, and described pressure relief device 5 is arranged on described grouting port device 2.
Pressure relief device 5 includes fixing parts 51, connection member 52, packaged unit 53, stopper 54 and cylinder 55.When the empty cavity pressure of flexible pipe 1 exceedes design pressure, under mechanical traction or artificial draw, connection member 52 drives packaged unit 53 to leave stopper 54, serosity is discharged outside flexible hose 1, after the empty cavity pressure of flexible pipe 1 is reduced to design load, connection member 52 traction closed parts 53 to stopper 54 place, closed hose 1, prevent serosity seepage, keep flexible pipe or flexible support internal cavity pressure constant.Connection member 52 can be spring.
Pressure relief device 5 may be used without the relief valve commonly used.
In the embodiment of the present invention, slip casting termination 22, pressure relief device 5 all can one-time fix on the connection end 21 of grouting port device 2, detachable apparatus can also be designed to, when slip casting termination 22 and pressure relief device 5 being dismantled from connection end 21 after the serosity in flexible pipe hardens, recycle.
Figure 10 is the structural representation of flexible support embodiment two of the present invention.Referring to Figure 10, the present embodiment flexible support be shaped as Semicircular arched, comprising: flexible pipe 1 and grouting port device；Wherein, described grouting port device is connected with the end seals of described flexible pipe 1；Described flexible pipe 1 is provided with exhaust apparatus 3；Being equipped with tension flexible cord 4 in cavity in described flexible pipe 1, the termination of described tension flexible cord 4 is fixed on described grouting port device, or the two ends of described tension flexible cord 4 interconnects.
In the present embodiment, be perfused with serosity by described grouting port device in described flexible pipe, described grout curing after, described flexible support becomes rigid support.
In the present embodiment, described grouting port device includes the first grouting port device 27 and the second grouting port device 28；Referring to Figure 11, the first grouting port device 27 includes the first connection end 271 and the slip casting termination 272 being arranged on described first connection end；One end of described first connection end 271 is link, and the other end is blind end；The link of described first connection end 271 and the first end of described flexible pipe 1 are tightly connected；The parts 273 of termination for fixing described tension flexible cord 4 one end it are provided with in described first connection end 271；The structure of the second grouting port device 28 is identical with the structure of the first grouting port device 27, repeats no more.In the present embodiment, described grouting port device 2 also in be provided with self-enclosed structure；Described self-enclosed structure is essentially identical with the self-enclosed structure in the grouting port device in embodiment one, does not repeat them here.
In the present embodiment, described exhaust apparatus 3 is essentially identical with the structure of the exhaust apparatus in embodiment one, does not repeat them here.
In the present embodiment, described flexible support also includes pressure relief device 5, and described pressure relief device 5 is arranged on described grouting port device 27 and/or 28.
Figure 12 is the schematic flow sheet of method for protecting support embodiment of the present invention.Referring to Figure 12, embodiment of the present invention method for protecting support, including step:
S11, by the flexible pipe of predetermined length in operating position first one-step forming；
In the present embodiment, described flexible pipe can be laid with flexible pipe wiry for sidewall, be alternatively longitude and latitude webmaster or PVC (Polyvinylchloride) pipe etc., as long as being easy to fold, bend and have required tensile strength.
In advance flexible pipe can be cut into predetermined length, then be transported to working space；The flexible pipe of certain length can also be intercepted according to digging in-situ space girth temporarily.
One or a few supporting arrangement L such as hydraulic pressure point post or common steel tube can be adopted, it is also possible to overlap just flexible pipe with the tinsel being connected with anchor pole or flexible pipe 1 and prop up, preliminarily forming.Supporting arrangement has supporting and guide effect, it is prevented that support slants.Figure 13 and Figure 14 is by the shape after the flexible pipe of predetermined length one-step forming at the beginning of operating position in method for protecting support embodiment of the present invention.
S12, by grouting port described inside hose inject serosity, described flexible pipe bulges under the pressure effect of serosity, the gas of described inside hose is expelled to outside described flexible pipe by the exhaust apparatus being arranged on described flexible pipe simultaneously, and after filling serosity in described flexible pipe, described exhaust apparatus is closed；
In the present embodiment, flexible pipe is operationally curved.Arc flexible pipe outer arc length is more than inner arc length, so the arc flexible pipe outer arc surface area difference long-pending with inner arcuate surface is multiplied by grouting pressure and extends out power equal to arc flexible pipe.
In the present embodiment, grouting equipment can be adopted to be fed in flexible pipe 1 cavity by grouting port device 2 by grouting serous fluid, fill rear exhaust apparatus 3 and close steam vent.Grouting equipment, except concrete pump, also can have the equipment such as hydraulic pump, oil pressure pump.
S13, continuation inject serosity at described inside hose, and described flexible pipe is under the effect of slurry pressure, and country rock is actively applied pressure by flexible pipe expansion；
In the present embodiment, continuing to inject serosity, under grouting pressure effect, arc flexible pipe produces to expand outwardly to country rock wall, and country rock wall is produced pressure, active support country rock.
S14, after the pressure of described inside hose reaches predetermined pressure, described grouting port close；
In the present embodiment, when the pressure of inside hose reaches predetermined design pressure, stopping slip casting, grouting port is closed, and keeps flexible pipe sky cavity pressure constant, it is ensured that hose forming effect, all the time country rock is produced pressure, active support country rock.
The grout cures injected in S15, described flexible pipe.
In the present embodiment, after the design time, grouting serous fluid solidifies, and does not shrink or microdilatancy, it is ensured that in flexible pipe cavity, filling all the time is closely knit, forms rigid support supporting country rock.
In the present embodiment, flexible pipe can be become rigid support by above-mentioned steps, country rock is played support action.
Semicircular arched flexible pipe shown in Figure 13, inject grout curing after can form the supporting structure shown in Fig. 9；Circular hose shown in Figure 14, inject grout curing after can form the supporting structure shown in Fig. 1.
The method for protecting support that the embodiment of the present invention provides, adopting flexible pipe as stake body, cost is low, it is simple to transport and installation, by grouting port device inject in described flexible pipe grout curing after can play the effect of rigid protection, and country rock actively can be applied pressure and carry out active support.
In aforementioned method for protecting support embodiment, alternatively, before by the flexible pipe of predetermined length one-step forming (S11) at the beginning of operating position, described method includes: wear tension flexible cord 4 in described flexible pipe；The termination of described tension flexible cord 4 is fixed on grouting port device 2, or the two ends of described tension flexible cord is interconnected；The end seals of grouting port device 2 with described flexible pipe 1 is connected.
In the present embodiment, the tension flexible cord 4 worn in described flexible pipe, as built-in muscle after grout curing, it is possible to increase the radial direction inflection moment of flexure of flexible support and tangential bearing capacity, also act as arc length in fixing flexible support simultaneously, control the effect of rack forming.
In aforementioned method for protecting support embodiment, alternatively, described by the flexible pipe of predetermined length, in operating position, first one-step forming (S11) including: the flexible pipe of predetermined length preliminarily forms the shape of a hoof, circular oval or Semicircular arched in operating position.
In the present embodiment, the flexible pipe of predetermined length can be preliminarily formed Semicircular arched in operating position, as shown in figure 13；Also the flexible pipe of predetermined length can be preliminarily formed the shape of a hoof in operating position, as shown in figure 14.
In aforementioned method for protecting support embodiment, alternatively, described continuation injects serosity at described inside hose, and described flexible pipe is under the effect of slurry pressure, and country rock is actively applied pressure (S13) by flexible pipe expansion, including:
Continuing to inject serosity at described inside hose, described flexible pipe is under the effect of slurry pressure, and country rock is actively applied pressure by arc flexible pipe.
In the present embodiment, the described tension flexible cord 4 worn in flexible pipe retrains hose length especially inner arc length, thus controlling arc support arc length, thus playing the effect assisting rack forming.
In aforementioned method for protecting support embodiment, alternatively, described method for protecting support, also include:
When described inside hose slip casting, if the pressure of inside hose exceedes predetermined pressure, carry out pressure release by pressure relief device, in order to discharge filling serosity in time, reduce the pressure of serosity in flexible pipe, it is prevented that the excessive destruction to flexible pipe and connected components thereof of tube internal pressure；And/or
Complete in described inside hose slip casting, after described grouting port is closed, before the grout cures of described soft casing pack, surrouding rock deformation is compressed described flexible pipe and is caused when inside hose pressure raises, pressure release is carried out by pressure relief device, prevent surrouding rock deformation compression flexible pipe from causing that in flexible pipe, grouting pressure raises, and makes flexible pipe (flexible support) have the pressure effect that actively allows.
In aforementioned method for protecting support embodiment, alternatively, tinsel (not shown) it is laid with in the sidewall of described flexible pipe；Referring to Fig. 5 and Fig. 6, described exhaust apparatus 3 includes body 31, has steam vent 32, the size being sized larger than the port of export 322 of described steam vent 32 arrival end 321, be provided with stopper 33 in steam vent 32 inside described body 31；The end of the arrival end 321 of steam vent is provided with reticulate body 34, and the periphery of arrival end 321 is provided with agnail 35, and the periphery of the port of export 322 is provided with flange 36.
Before wearing tension flexible cord in described flexible pipe, described method also includes: utilize the agnail of the arrival end periphery of the steam vent of described exhaust apparatus, pierce through the sidewall of flexible pipe, the arrival end making steam vent enters in described flexible pipe, the agnail of described arrival end periphery is corresponding with the described tinsel laid in the sidewall of described flexible pipe, and the flange of the port of export periphery of steam vent is close to the outer wall of described flexible pipe.
Flange 36 has and prevents exhaust apparatus entirety to be driven into the function in flexible pipe, has the effect of closure exhaust apparatus 3 and the gap of flexible pipe 1 simultaneously.Agnail 35 can penetrate hose wall under the effect of knocking, and self barb structure can be stuck on the steel wire laid in hose wall, it is prevented that under grouting pressure, exhaust apparatus 3 and flexible pipe 1 depart from.
The method for protecting support embodiment of the present invention, it is possible to be applied to the supporting of the flexible support shown in Fig. 1 or Fig. 2.
Flexible support embodiment of the present invention is except applying in underground engineering except supporting country rock, can also utilize in ground surface works, utilize built-in tension flexible cord to assist its molding, or under ring mould wraps up form, form rigid structure, play support or suspension effect.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (10)
1. a flexible support, it is characterised in that including: flexible pipe and grouting port device；Wherein,
Described grouting port device is connected with the end seals of described flexible pipe；
Described flexible pipe is provided with exhaust apparatus；
Being equipped with tension flexible cord in cavity in described flexible pipe, the termination of described tension flexible cord is fixed on described grouting port device, or the two ends of described tension flexible cord interconnects.
2. flexible support according to claim 1, it is characterised in that described flexible support be shaped as closed supports；Described grouting port device includes connection end and the slip casting termination being arranged on described connection end；Wherein,
Described connection end includes the first end of the first link and the second link, the first link and described flexible pipe and is tightly connected, and the second end of the second link and described flexible pipe is tightly connected；
The parts of termination for fixing described tension flexible cord it are provided with in described first link and/or the second link.
3. flexible support according to claim 1, it is characterised in that described flexible support is shaped as non-close support, described grouting port device includes the first grouting port device and the second grouting port device；
First grouting port device includes the first connection end and the slip casting termination being arranged on described first connection end；One end of described first connection end is link, and the other end is blind end；The link of described first connection end and the first end of described flexible pipe are tightly connected；The parts of termination for fixing described tension flexible cord one end it are provided with in described first connection end；
Second grouting port device includes the second connection end and the slip casting termination being arranged on described second connection end；One end of described second connection end is link, and the other end is blind end；The link of described second connection end and the second end of described flexible pipe are tightly connected；The parts of termination for fixing the described tension flexible cord other end it are provided with in described second connection end.
4. the flexible support according to Claims 2 or 3, it is characterised in that be provided with self-enclosed structure in described grouting port device；Wherein,
Described self-enclosed structure includes traction element, connection member and packaged unit；
Described traction element is positioned at described slip casting termination, and described packaged unit is in described connection end and can be closed by the path between internal and described for described slip casting termination connection end inside, and described connection member connects described traction element and packaged unit；
During slip casting, serosity promotes described traction element internal mobile to slip casting termination under pressure, traction element promotes described packaged unit that from closed state, the path between internal and described for described slip casting termination connection end inside is become conducting state by described connection member, and serosity is injected in flexible pipe through described traction element；After slip casting, packaged unit resets under the effect of traction element and connection member, is again closed by the path between internal and described for described slip casting termination connection end inside.
5. flexible support according to claim 1, it is characterised in that described flexible support also includes pressure relief device, described pressure relief device is arranged on described grouting port device.
6. flexible support according to claim 1, it is characterised in that described exhaust apparatus includes body, has steam vent, the size being sized larger than the port of export of described steam vent arrival end in described body interior, is provided with stopper in steam vent；
The end of the arrival end of steam vent is provided with reticulate body, and the periphery of arrival end is provided with agnail, and the periphery of the port of export is provided with flange；
The arrival end of described steam vent is positioned at described flexible pipe, and the port of export is positioned at outside described flexible pipe.
7. flexible support according to claim 6, it is characterised in that be laid with tinsel in the sidewall of described flexible pipe, the agnail of described arrival end periphery is corresponding with the described tinsel laid in the sidewall of described flexible pipe；The flange of the port of export periphery of described steam vent is close to the outer wall of described flexible pipe.
8. flexible support according to claim 1, it is characterised in that described flexible pipe is that sidewall is laid with flexible pipe wiry, longitude and latitude webmaster or pvc pipe.
9. the flexible support according to Claims 2 or 3, it is characterised in that described closed supports includes circle, ellipse or the shape of a hoof: described non-close support includes Semicircular arched；
Be perfused with serosity by described grouting port device in described flexible pipe, described grout curing after, described flexible support becomes rigid support.
10. flexible support according to claim 4, it is characterised in that described traction element is annulus or plate with holes；Described connection member is connecting rod；Described packaged unit is circular steel plate；Preferably, being arranged with spring in described connecting rod, one end of described spring can lean with described traction element, and the other end can lean with stopper；Wherein, stopper is prevented from the cavity that traction element enters within connection end；Stopper is positioned at the position near the cavity within connection end, the slip casting termination.
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| CN201610125446.6A CN105781596B (en) | 2016-03-04 | 2016-03-04 | A kind of flexible support and method for protecting support |
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| CN109489922A (en) * | 2018-11-15 | 2019-03-19 | 华北科技学院 | It is a kind of for testing the experimental rig of flexible support mechanical property |
| CN110424990A (en) * | 2019-07-11 | 2019-11-08 | 华北科技学院 | A kind of driving poured support construction equipment and method |
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| CN103485805A (en) * | 2013-09-06 | 2014-01-01 | 中国矿业大学(北京) | Structure of steel-bar concrete rack section, grouting port and air exhausting hole |
| CN104061008A (en) * | 2014-06-11 | 2014-09-24 | 李学彬 | Underground perfusion type flexible support and construction method thereof |
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| US3885397A (en) * | 1973-11-23 | 1975-05-27 | Taiheiyo Coal Mining Co Ltd | Mining shield-supporter |
| CN101144386A (en) * | 2007-11-01 | 2008-03-19 | 王晓利 | Disposable flexible template device and construction method thereof |
| CN103485805A (en) * | 2013-09-06 | 2014-01-01 | 中国矿业大学(北京) | Structure of steel-bar concrete rack section, grouting port and air exhausting hole |
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| CN110424990A (en) * | 2019-07-11 | 2019-11-08 | 华北科技学院 | A kind of driving poured support construction equipment and method |
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| CN105781596B (en) | 2019-03-29 |
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