CN110700864B - Active stress relieving device and active stress relieving method for tunnel construction - Google Patents

Active stress relieving device and active stress relieving method for tunnel construction Download PDF

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Publication number
CN110700864B
CN110700864B CN201911020809.XA CN201911020809A CN110700864B CN 110700864 B CN110700864 B CN 110700864B CN 201911020809 A CN201911020809 A CN 201911020809A CN 110700864 B CN110700864 B CN 110700864B
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bag
extrusion
special
shaped transmission
holes
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CN110700864A (en
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黄建国
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Dongyang Chenxu Construction Engineering Design Co., Ltd
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Dongyang Chenxu Construction Engineering Design Co Ltd
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Priority to CN201810499167.5A priority Critical patent/CN108708747B/en
Priority to CN201911020809.XA priority patent/CN110700864B/en
Publication of CN110700864A publication Critical patent/CN110700864A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14Lining predominantly with metal
    • E21D11/18Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/10Lining 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
    • E21D11/105Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete

Abstract

The invention discloses an active stress relief device and an active stress relief method for tunnel construction, and relates to the technical field of tunnel construction. The active stress eliminating device for tunnel construction comprises a force eliminating arch frame, wherein the two ends of the force eliminating arch frame are respectively welded with the upper surfaces of two positioning feet, a linking port which is arranged by taking the circle center of the force eliminating arch frame as the center circumference is arranged on the force eliminating arch frame, an anchor hole is formed in the force eliminating arch frame, a cavity is formed in the force eliminating arch frame, thirteen leading-out holes communicated with the cavity are formed in the middle of the outer side surface of the force eliminating arch frame, and inclined holes communicated with the cavity are formed in the positions, corresponding to the leading-out holes, of the back surface and the front surface of the force eliminating arch frame. This active stress relief device of tunnel construction utilizes the special-shaped transmission bag in the pneumatic extrusion mechanism can promote extrusion stem and injection mechanism, realizes the quick effectual support to the tunnel inner wall, subducts the influence of stress to tunnel inner wall structure fast.

Description

Active stress relieving device and active stress relieving method for tunnel construction
The invention relates to a divisional application of an active stress relieving device for loose sand-gravel geological tunnel construction, which is applied for 2018, 05, 23 and the application number of CN 201810499167.5.
Technical Field
The invention relates to the technical field of tunnel construction, in particular to an active stress relief device and an active stress relief method for tunnel construction.
Background
Various terrains can be encountered when tunnels are excavated in different regions, some terrains are favorable for the construction of the tunnels, and some terrains bring great difficulty to the construction of the tunnels, for example, the tunnel construction of loose sand and gravel geology, as the geology is loose, after the tunnel excavation is a hole, the loose sand and gravel on the tunnel wall bear great stress, and the condition that the tunnel is easy to loose and deform and collapse threatens the safety of workers.
Chinese patent (granted publication No. CN204591296U) discloses a tunnel supporting structure, which utilizes a frame body and a hydraulic supporting device to make it capable of providing stable and uniform support for a tunnel; for another example, chinese patent (publication No. CN206111211U) discloses a regular polygon prestressed support for preventing deformation of side-ported circular tunnels, which utilizes the stability of the regular polygon structure to provide support for the tunnels, and alleviate the damage of stress to the tunnels.
Due to the loose characteristic of the loose sand and pebble structure, compared with other terrains, after the loose sand and pebble geological hole is formed, a large number of hollow parts are easier to appear on the inner wall of the tunnel, and the traditional supporting device cannot quickly realize effective support, so that an active stress eliminating device for the loose sand and pebble geological tunnel construction is urgently needed.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the active stress relieving device for loose sand and pebble geological tunnel construction, which has the advantages of quickly providing support for the tunnel, reducing the risk of collapse of the loose sand and pebble geological tunnel and effectively reducing the working hours.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the active stress eliminating device comprises a force eliminating arch, wherein the two ends of the force eliminating arch are respectively welded with the upper surfaces of two positioning feet, a linking port which is distributed by taking the center of the force eliminating arch as the center circumference is arranged on the force eliminating arch, an anchor hole is formed in the force eliminating arch, a cavity is formed in the force eliminating arch, thirteen guide holes communicated with the cavity are formed in the middle of the outer side surface of the force eliminating arch, inclined holes communicated with the cavity are formed in the positions, corresponding to the guide holes, of the back surface and the front surface of the force eliminating arch, a pneumatic extrusion mechanism is arranged in the position, corresponding to the inclined holes, in the cavity, and an injection mechanism is arranged in the position, corresponding to the guide holes, of the outer side surface of the force eliminating arch.
Preferably, the pneumatic extrusion mechanism comprises a special-shaped transmission bag matched with the cavity in shape, extrusion rods inserted into two inclined holes, a sealing mechanism arranged at one end of each extrusion rod far away from the special-shaped transmission bag, five tooth sockets arranged on the upper side wall of each inclined hole and close to the opening of the inclined hole, a rectangular groove arranged on the upper side wall of each extrusion rod and close to one side of the special-shaped transmission bag, a U-shaped elastic sheet bonded with the bottom wall of the rectangular groove, and a latch bonded with one end of the U-shaped elastic sheet far away from the bottom wall of the rectangular groove, wherein the U-shaped elastic sheet is in a compressed state, one right-angle edge of each of the five tooth sockets is close to the upper side of the extrusion rod, an acute angle of each tooth socket points to the opening of the inclined hole, the latch is matched with the tooth socket, the depth of each tooth socket is smaller than the height of the latch, the outer surface of the special-shaped transmission bag is bonded, the special-shaped transmission bag further comprises extrusion ends which extend into the guide-out hole and the two inclined holes respectively, and the extrusion ends which extend into the two inclined holes are fixedly connected with the two extrusion rods respectively.
Preferably, the spraying mechanism comprises a base plate, spraying bags, ejector rods, a top plate, ejector heads, ejector spines, spraying grooves, round holes and a lantern ring, the middle of the lower surface of the base plate is fixedly connected with an extrusion end of the special-shaped transmission bag, which is positioned in the guide hole, the lower surface of the spraying bag is bonded on the upper surface of the base plate, the spraying bags in each spraying mechanism are mutually communicated, a feeding port of each spraying bag is positioned at the top end of the inner wall of the force dissipating arch frame, the inner bottom wall of each spraying bag is fixedly connected with four ejector rods, the top wall of each spraying bag is provided with the round holes corresponding to the four ejector rods, the inner side walls of the round holes are bonded with the outer side surfaces of the lantern rings, the ejector rods are fixedly sleeved in the lantern rings, the top ends of the ejector rods extend to the upper sides of the spraying bags and are fixedly connected with the middle of the lower surface of the top plate, the top spines are bonded, the depth of the injection groove is half of the rear end of the top wall of the injection bag.
Preferably, sealing mechanism includes shrouding, hole sealing, semicircle orifice, semicolumn, the triangle prism, seal groove, sealed pad and arc cushion, the one end that special-shaped transmission bag was kept away from to the stripper rod bonds and has had the shrouding, has seted up four hole sealing from a left side to the right side on the shrouding in proper order, and the one end that special-shaped transmission bag was kept away from to the stripper rod corresponds the position of hole sealing and has seted up the semicircle orifice, the inside of semicircle orifice is provided with the semicolumn, it has the arc cushion of evenly arranging to bond on the cambered surface of semicolumn, and the one end of semicolumn and the inner wall contact of semicircle orifice are kept away from to the arc cushion, the upper surface of semicolumn bonds and has the prismatic bottom surface of triangle, has.
Preferably, the cross-section of triangle prism becomes isosceles triangle, and the side is two equal limits on its cross-section about the triangle prism, and the top of triangle prism is the arc, and the diapire of seal groove is the arc, and sealed the pad is the rubber cushion.
Preferably, the valve is bonded on the left side wall and the right side wall of the special-shaped transmission bag positioned in the extrusion end in the guide hole, one ends of the two valves which are close to each other are contacted, and the ends of the two valves which are contacted are both lifted upwards to form an arc shape.
Preferably, the special-shaped transmission bag is in an uninflated state, the lower surface of the base plate is in contact with the outer side surface of the force eliminating arch, one end, far away from the special-shaped transmission bag, of the extrusion rod is located between the outer side surface of the force eliminating arch and the upper surface of the base plate, and three extrusion ends of the special-shaped transmission bag are in a contracting shape.
Preferably, the ejection bag is a rubber bag, one end of the top thorn pointing to the ejection bag is sharp, the thickness of the ejection bag ranges from four millimeters to six millimeters, the top head is a rubber soft head, and the difference between the distance from the bottom end of the top thorn to the inner bottom wall of the ejection bag and the height of the ejection bag ranges from four millimeters to ten millimeters.
Preferably, two adjacent extrusion rods in the pneumatic extrusion mechanism are fixedly connected through a shielding cloth, one end, close to the force-dissipating arch frame, of the shielding cloth is bonded with a guide rod, the guide rod is welded on the force-dissipating arch frame, guide grooves are formed in one side face, opposite to the two adjacent extrusion rods, of the two adjacent extrusion rods, and the two ends of the guide rod are respectively inserted into the two guide grooves.
Preferably, the left end and the right end of the outer side surface of the force dissipating arch are fixedly connected with the blocking blocks for blocking the opening ends of the spraying mechanisms at the two ends of the force dissipating arch so as to avoid a large amount of leakage after the concrete is sprayed.
(III) advantageous effects
The invention provides an active stress relieving device for loose sand-gravel geological tunnel construction. The method has the following beneficial effects:
(1) the active stress eliminating device for the loose sand-gravel geological tunnel construction utilizes the special-shaped transmission bag in the pneumatic extrusion mechanism to push the extrusion rod and the injection mechanism, so that the tunnel inner wall can be quickly and effectively supported, and the influence of stress on the tunnel inner wall structure can be quickly reduced.
(2) This an initiative stress relief device for loose sand cobble geological tunnel construction, through injection mechanism's setting, fill in the injection bag into concrete, can fill fast the space between power dissipation bow member and the tunnel inner wall, provide the support for the tunnel inner wall, realize the elimination of tunnel inner wall stress.
(3) This an initiative stress relief device for loose sand cobble geological tunnel construction utilizes sealing mechanism's setting, and the semicircle pillar can the minimalization at the semicircle orifice and rotate, and the tunnel inner wall can be laminated fast after the extrusion stem stretches out, avoids the appearance of the loose sand cobble landing condition, provides effective support and sealed.
(4) This an initiative stress relief device for loose sand cobble geological tunnel construction, be different from traditional bearing structure and set up the cushion in order pursuit the laminating degree, to the geological structure with loose sand cobble, sealing mechanism changes and penetrates the cobble gap, provides diversified support by side and ground, and the effect is better.
(5) This an initiative stress relief device for loose sand cobble geological tunnel construction, through the setting of the last seal groove of triangular prism, make sealing mechanism change the appearance that adapts to the cobble, realize better laminating in order to reach effectual support to reduce the influence of stress to the tunnel inner wall.
(6) This an initiative stress relief device for loose sand cobble geological tunnel construction utilizes the setting of sealed pad, friction when can effectual improvement sealing mechanism and cobble contact, the slippage appears after avoiding the cobble to obtain supporting.
(7) This an initiative stress relief device for loose sand cobble geological tunnel construction utilizes the elasticity of sealed pad, and when sealing mechanism and tunnel inner wall contacted, sealed pad formed the cladding to the cobble, changes and keeps tunnel inner wall structure in order to eliminate stress.
(8) This an initiative stress relief device for loose sand cobble geological tunnel construction utilizes the setting of valve, and when the dysmorphism transmission bag was aerifyd, the extrusion end that is located the inclined hole was gone into earlier gas and is promoted the extrusion pole and support the tunnel inner wall, then injection mechanism is held the jack-up by another extrusion, helps realizing carrying out the operation that the concrete was poured after supporting the seal again, does benefit to going on of construction, reduces man-hour.
(9) This an initiative stress relief device for loose sand cobble geological tunnel construction utilizes the setting of jet tank and top thorn, just is pricked by the top after the injection bag is filled, helps between the quick filling of concrete and the power dissipation bow member and the tunnel inner wall, has avoided the decoration work after the construction.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;
FIG. 4 is an enlarged view taken at B of FIG. 2 in accordance with the present invention;
FIG. 5 is a schematic structural view of a pneumatic extrusion mechanism and an injection mechanism when the special-shaped transmission bag is inflated;
fig. 6 is a cross-sectional view of two adjacent compression plates connected by a scrim in accordance with the present invention.
In the figure: the device comprises a force-dissipating arch center 1, a positioning foot 2, a connecting port 3, an anchor hole 4, a cavity 5, an outlet hole 6, an inclined hole 7, a pneumatic extrusion mechanism 8, a special-shaped transmission bag 81, an extrusion rod 82, a sealing mechanism 83, a sealing plate 831, a sealing hole 832, a semicircular hole 833, a semicircular column 834, a triangular prism 835, a sealing groove 836, a sealing gasket 837, an arc-shaped cushion block 838, a tooth groove 84, a rectangular groove 85, a U-shaped elastic sheet 86, a latch 87, an injection mechanism 9, a 91 base plate, an injection bag 92, a push rod 93, a top plate 94, a top head 95, a top pin 96, an injection groove 97, a circular hole 98, a lantern ring 99, a valve 10, a shading cloth 11, a guide rod 12, a guide groove 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, the present invention provides a technical solution: an active stress eliminating device for loose sand and pebble geological tunnel construction comprises a force eliminating arch 1, wherein the two ends of the force eliminating arch 1 are respectively welded with the upper surfaces of two positioning feet 2, a linking port 3 which is arranged by taking the center of a force eliminating arch as the center circumference is arranged on the force eliminating arch 1, the linking port 3 is used for linking the adjacent force eliminating arch 1, an anchor hole 4 is arranged on the force eliminating arch 1, the anchor hole 4 is used for an anchor rod to realize the positioning between the force eliminating arch 1 and the inner wall of a tunnel, the active stress eliminating device belongs to the well-known technology in the technical field, without much description, a cavity 5 is arranged inside the force eliminating arch 1, thirteen guide holes 6 which are communicated with the cavity 5 are arranged in the middle of the outer side surface of the force eliminating arch 1, inclined holes 7 which are communicated with the cavity 5 are arranged at the positions, which correspond to the guide holes 6, a pneumatic extrusion mechanism 8 is arranged inside the cavity 5 and corresponds to the inclined holes 7, the outer side surface of the force-eliminating arch 1 is provided with a spraying mechanism 9 corresponding to the position of the guide-out hole 6.
The pneumatic extrusion mechanism 8 comprises a special-shaped transmission bag 81 which is matched with the cavity 5 in shape, extrusion rods 82 which are inserted into two inclined holes 7, a sealing mechanism 83 which is arranged at one end, far away from the special-shaped transmission bag 81, of the extrusion rod 82, five tooth grooves 84 which are arranged on the upper side wall of each inclined hole 7 and close to the opening of each inclined hole, a rectangular groove 85 which is arranged on one side, close to the upper side of the special-shaped transmission bag 81, of the extrusion rod 82, a U-shaped elastic sheet 86 which is adhered to the bottom wall of the rectangular groove 85, a clamping tooth 87 which is adhered to one end, far away from the bottom wall of the rectangular groove 85, of the U-shaped elastic sheet 86, the U-shaped elastic sheet 86 is in a compressed state, one right-angle side edge of each five tooth grooves 84 is close to the upper side of the extrusion rod 82, one acute angle of each tooth groove 84 points to the opening of the inclined hole 7, the clamping tooth 87 is matched with the tooth grooves, the inflation inlet of the special-shaped transmission bag 81 is located at the left end of the inner wall of the force-eliminating arch center 1, the special-shaped transmission bag 81 further comprises extrusion ends extending into the guide-out hole 6 and the two inclined holes 7 respectively, the extrusion ends extending into the two inclined holes 7 are fixedly connected with the two extrusion rods 82 respectively, the extrusion rods 82 and the injection mechanism 9 can be pushed by the special-shaped transmission bag 81 in the pneumatic extrusion mechanism 8, quick and effective support for the inner wall of the tunnel is achieved, and the influence of stress on the structure of the inner wall of the tunnel is reduced quickly.
The injection mechanism 9 comprises a base plate 91, injection bags 92, ejector rods 93, a top plate 94, an ejector head 95, an ejector pin 96, an injection groove 97, a round hole 98 and a lantern ring 99, the middle part of the lower surface of the base plate 91 is fixedly connected with an extrusion end of the special-shaped transmission bag 81 positioned in the guide-out hole 6, the lower surface of the injection bag 92 is bonded on the upper surface of the base plate 91, the injection bags 92 in each injection mechanism 9 are communicated with each other, a feeding port of the injection bag 92 is positioned at the top end of the inner wall of the stilling arch frame 1, the inner bottom wall of the injection bag 92 is fixedly connected with the four ejector rods 93, the round hole 98 is formed in the top wall of the injection bag 92 corresponding to the four ejector rods 93, the outer side surface of the lantern ring 99 is bonded on the inner wall of the round hole 98, the ejector rods 93 are fixedly connected in the lantern ring 99, a gap still exists between the ejector rods 93 and, avoid spouting bag 92 local deformation, and the top of ejector pin 93 extends to the upside of spouting bag 92 and fixedly connected with the middle part of roof 94 lower surface, roof 94's upper surface bonds has top 95, roof 94's lower surface and the left and right sides that is located ejector pin 93 bond has top thorn 96, spout groove 97 has all been seted up to the inner bottom wall of spouting bag 92 corresponding to the position of roof thorn 96 of roof 94 lower surface both sides, the degree of depth of spout groove 97 is half of the rear end of the roof of spouting bag 92, through the setting of injection mechanism 9, fill in the concrete in spouting bag 92, can fill the space between extinction bow member 1 and the tunnel inner wall fast, provide support for the tunnel inner wall, realize the elimination of tunnel inner wall stress, utilize the setting of spout groove 97 and top thorn 96, spout bag 92 is just punctured by top thorn 96 after being filled, help concrete to fill and disappear between bow member 1 and the tunnel inner wall fast, the modification work after construction is avoided.
The sealing mechanism 83 comprises a sealing plate 831, a sealing hole 832, a semicircular hole 833, a semi-cylinder 834, a triangular prism 835, a sealing groove 836, a sealing gasket 837 and an arc-shaped cushion block 838, wherein the sealing plate 831 is bonded to one end of the extrusion rod 82 far away from the special-shaped transmission bag 81, four sealing holes 832 are sequentially formed in the sealing plate 831 from left to right, the semicircular hole 833 is formed in the position, corresponding to the sealing hole 832, of one end of the extrusion rod 82 far away from the special-shaped transmission bag 81, the semi-cylinder 834 is arranged inside the semicircular hole 833, the arc-shaped cushion block 838 is uniformly distributed and bonded on the arc surface of the semi-cylinder 834, one end of the arc-shaped cushion block 838, far away from the semi-cylinder 834, is in contact with the inner wall of the semicircular hole 833, the bottom surface of the triangular prism 835 is bonded on the upper surface of the semi-cylinder 834, the sealing grooves 836 are formed in the left side surface and the, the extrusion rod 82 can be quickly attached to the inner wall of the tunnel after extending out, the condition that loose sand and pebbles slide off is avoided, effective support and sealing are provided, the traditional support structure is different from a traditional support structure which is provided with a cushion for pursuing attachment degree, the sealing mechanism 83 is easier to penetrate into a pebble gap aiming at the geological structure of the loose sand and pebbles, multi-azimuth support is provided by the side surface and the ground, the effect is better, by arranging the sealing groove 836 on the triangular prism 835, the sealing mechanism 83 is more easily adapted to the shape of a pebble, better fit is realized to achieve effective support, so as to reduce the influence of stress on the inner wall of the tunnel, the friction between the sealing mechanism 83 and the pebble can be effectively improved by the arrangement of the sealing gasket 837, the pebble is prevented from slipping after being supported, and by the elasticity of the sealing gasket 837, when the sealing mechanism 83 contacts the inner wall of the tunnel, the sealing gasket 837 covers the pebbles, so that the structure of the inner wall of the tunnel is easier to maintain to eliminate stress.
The section of the triangular prism 835 is an isosceles triangle, the left side and the right side of the triangular prism 835 are two equal sides on the section, the top end of the triangular prism 835 is arc-shaped, the bottom wall of the sealing groove 836 is arc-shaped, and the sealing gasket 837 is a rubber cushion.
Valve 10 has all been bonded on the lateral wall about the dysmorphism transmission bag 81 is located extrusion end in the derivation hole 6, the one end contact that two valve 10 are close, and the one end that two valve 10 contacted all upwards raises and is the arc, utilize the setting of valve 10, when dysmorphism transmission bag 81 aerifys, the extrusion end that is located inclined hole 7 is gone into earlier the gas and is promoted the stripper finger 82 and support the tunnel inner wall, then injection mechanism 9 is held the jack-up by another extrusion, help realizing supporting the operation that carries out concrete pouring again after the sealed, do benefit to going on of construction.
The special-shaped transmission bag 81 is in an uninflated state, the lower surface of the base plate 91 is in contact with the outer side surface of the force dissipating arch 1, one end of the extrusion rod 82, far away from the special-shaped transmission bag 81, is positioned between the outer side surface of the force dissipating arch 1 and the upper surface of the base plate 91, three extrusion ends of the special-shaped transmission bag 81 are all in a contracted state, and the three extrusion ends are extended and lengthened when the special-shaped transmission bag 81 is inflated.
The spraying bag 92 is a rubber bag, one end of the top prick 96 pointing to the spraying bag 92 is sharp, the thickness range of the spraying bag 92 is four-six millimeters, the top 95 is a rubber soft head, the difference between the distance from the bottom end of the top prick 96 to the inner bottom wall of the spraying bag 92 and the height of the spraying bag 92 is four-ten millimeters, the difference between the distance from the bottom end of the top prick 96 in the spraying mechanism 9 at the top of the stilling arch 1 to the inner bottom wall of the spraying bag 92 and the height of the spraying bag 92 is four millimeters, and the difference between the spraying mechanisms 9 from two sides of the spraying mechanism 9 at the top of the stilling arch 1 to two ends of the stilling arch 1 is gradually increased to the maximum ten millimeters.
Two extrusion poles 82 in two adjacent pneumatic extrusion mechanisms 8 pass through the fly 11 fixed connection, and the one end that fly 11 is close to the arch centering 1 that disappears bonds has guide bar 12, and guide bar 12 welds on the arch centering 1 that disappears, has all seted up guide way 13 on the relative side of two adjacent extrusion poles 82, and the both ends of guide bar 12 are pegged graft respectively in the inside of two guide ways 13.
The left end and the right end of the outer side surface of the force dissipating arch centering 1 are fixedly connected with the blocking blocks 14 for blocking the opening ends of the spraying mechanisms 9 at the two ends of the force dissipating arch centering 1 so as to avoid a large amount of leakage after the concrete is sprayed.
When the active stress relieving device for loose sandy gravel geological tunnel construction is used, a loose sandy gravel geological tunnel which is dug just now is pushed in, air is filled into the special-shaped transmission bag 81 through the opening end of the special-shaped transmission bag 81, the air blows up the extrusion end of the special-shaped transmission bag 81 in the inclined hole 7 first, the extrusion rod 82 props against the inner wall of the tunnel, the latch 87 is clamped into the tooth groove 84 and is continuously inflated, the extrusion end of the special-shaped transmission bag 81 in the guide hole 6 is inflated to enable the top head 95 in the injection mechanism 9 to prop against the inner wall of the tunnel, concrete is filled into the injection bag 92 through the opening of the injection bag 92, the injection bag 92 is propped up and deformed, the top pricks 96 are penetrated into the injection groove 97, and the concrete is filled in a closed space formed by the absorption arch frame 1, the shielding cloth 11 and the extrusion rod 82, so that the installation of the device is.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (8)

1. The utility model provides a tunnel construction's initiative stress relief device, includes power arch (1) that disappears, the both ends of power arch (1) that disappears weld respectively in the upper surface of two location feet (2), offer on power arch (1) that disappears and use power arch centre of a circle as interface (3) that the center circumference was arranged, and seted up anchor eye (4), its characterized in that on power arch (1) that disappears: the device is characterized in that a cavity (5) is formed in the stilling arch (1), thirteen guide holes (6) communicated with the cavity (5) are formed in the middle of the outer side surface of the stilling arch (1), inclined holes (7) communicated with the cavity (5) are formed in the positions, corresponding to the guide holes (6), of the back surface and the front surface of the stilling arch (1), a pneumatic extrusion mechanism (8) is arranged in the cavity (5) and in the position corresponding to the inclined holes (7), and an injection mechanism (9) is arranged on the outer side surface of the stilling arch (1) in the position corresponding to the guide holes (6); the spraying mechanism (9) comprises a base plate (91), a spraying bag (92), ejector rods (93), a top plate (94), an ejector head (95), a top thorn (96), a spraying groove (97), round holes (98) and a lantern ring (99), the middle of the lower surface of the base plate (91) is fixedly connected with an extrusion end of the special-shaped transmission bag (81) in the guide hole (6), the upper surface of the base plate (91) is bonded on the lower surface of the spraying bag (92), the spraying bags (92) in each spraying mechanism (9) are communicated with each other, a feeding port of each spraying bag (92) is positioned at the top end of the stilling arch frame (1), the inner bottom wall of each spraying bag (92) is fixedly connected with four ejector rods (93), the top wall of each spraying bag (92) is provided with the round holes (98) corresponding to the positions of the four ejector rods (93), the inner wall of each round hole (98) is bonded on the outer side surface of the lantern ring (99, the top end of the ejector rod (93) extends to the upper side of the ejection bag (92) and is fixedly connected with the middle of the lower surface of the ejector plate (94), an ejector head (95) is bonded on the upper surface of the ejector plate (94), ejector thorns (96) are bonded on the lower surface of the ejector plate (94) and positioned on the left side and the right side of the ejector rod (93), ejection grooves (97) are formed in positions, corresponding to the ejector thorns (96) on the two sides of the lower surface of the ejector plate (94), of the inner bottom wall of the ejection bag (92), and the depth of each ejection groove (97) is one half of the rear end of the top wall of the ejection; the jet bag (92) is a rubber bag, one end of the top thorn (96) pointing to the jet bag (92) is sharp, the thickness range of the jet bag (92) is four-six millimeters, the top head (95) is a rubber soft head, and the difference range between the distance from the bottom end of the top thorn (96) to the inner bottom wall of the jet bag (92) and the height of the jet bag (92) is four-ten millimeters.
2. The active stress relief device for tunnel construction of claim 1, wherein: the pneumatic extrusion mechanism (8) comprises a special-shaped transmission bag (81) matched with the cavity (5) in shape, extrusion rods (82) inserted into the two inclined holes (7), a sealing mechanism (83) arranged at one end, far away from the special-shaped transmission bag (81), of the extrusion rods (82), five tooth sockets (84) formed on the upper side wall of each inclined hole (7) and close to the opening of the inclined hole, rectangular grooves (85) formed on one side, close to the special-shaped transmission bag (81), of the upper side wall of each extrusion rod (82), U-shaped elastic sheets (86) bonded to the bottom walls of the rectangular grooves (85), clamping teeth (87) bonded to one ends, far away from the bottom walls of the rectangular grooves (85), of the U-shaped elastic sheets (86), wherein the U-shaped elastic sheets (86) are in a compressed state, the right-angle side of each tooth socket (84) in the five tooth sockets (84) is close to the upper side of the extrusion rods (82), and an acute angle of, the latch (87) is matched with the tooth groove (84), the depth of the tooth groove (84) is smaller than the height of the latch (87), the outer surface of the special-shaped transmission bag (81) is bonded with the inner wall of the cavity (5), the special-shaped transmission bags (81) in each pneumatic extrusion mechanism (8) are communicated with each other, the inflation inlet of each special-shaped transmission bag (81) is positioned at the left end of the inner wall of the force dissipating arch frame (1), each special-shaped transmission bag (81) further comprises extrusion ends which extend into the guide-out hole (6) and the two inclined holes (7), and the extrusion ends which extend into the two inclined holes (7) are fixedly connected with the two extrusion rods (82) respectively.
3. The active stress relief device for tunnel construction of claim 2, wherein: the sealing mechanism (83) comprises a sealing plate (831), sealing holes (832), semicircular holes (833), semicylinders (834), triangular prisms (835), a sealing groove (836), a sealing gasket (837) and arc-shaped cushion blocks (838), wherein the sealing plate (831) is bonded to one end, away from the special-shaped transmission bag (81), of the extrusion rod (82), the four sealing holes (832) are sequentially formed in the sealing plate (831) from left to right, the semicircular holes (833) are formed in the positions, corresponding to the sealing holes (832), of one end, away from the special-shaped transmission bag (81), of the extrusion rod (82), the semicylinders (833) are arranged inside the semicylinders (833), the arc-shaped cushion blocks (838) are uniformly distributed in a bonding mode on the arc surface of the semicylinders (834), one end, away from the semicylinders (834) through the arc-shaped cushion blocks (838), is in contact with the inner walls of the semicircular holes (833), the upper, sealing grooves (836) are formed in the left side face and the right side face of the triangular prism (835), and sealing gaskets (837) are bonded between the upper side face and the lower side face of the inner wall of each sealing groove (836).
4. The active stress relief device for tunnel construction of claim 3, wherein: the cross-section of triangle prism (835) becomes isosceles triangle, and the side is two limits that equal on its cross-section about triangle prism (835), and the top of triangle prism (835) is the arc, and the diapire of seal groove (836) is the arc, and sealed pad (837) are the rubber cushion.
5. The active stress relief device for tunnel construction of claim 2, wherein: the valve (10) is bonded on the left side wall and the right side wall of the special-shaped transmission bag (81) located in the extrusion end of the guide-out hole (6), one ends of the two valves (10) which are close to each other are contacted, and the ends of the two valves (10) which are contacted are all upwards lifted to form an arc shape.
6. The active stress relief device for tunnel construction of claim 5, wherein: the special-shaped transmission bag (81) is in an uninflated state, the lower surface of the base plate (91) is in contact with the outer side surface of the force eliminating arch frame (1), one end, far away from the special-shaped transmission bag (81), of the extrusion rod (82) is located between the outer side surface of the force eliminating arch frame (1) and the upper surface of the base plate (91), and three extrusion ends of the special-shaped transmission bag (81) are all in a contracted state.
7. The active stress relief device for tunnel construction of claim 2, wherein: two adjacent two extrusion poles (82) in pneumatic extrusion mechanism (8) are through hiding cloth (11) fixed connection, the guide bar (12) have been bonded to the one end that hides cloth (11) are close to stilling bow member (1), and guide bar (12) welding is on stilling bow member (1), has all seted up guide way (13) on the relative side of two adjacent extrusion poles (82), and the inside at two guide ways (13) is pegged graft respectively at the both ends of guide bar (12).
8. An active stress relief method using the active stress relief apparatus for tunnel construction according to any one of claims 1 to 7, characterized in that: when the device is used, a loose sand and pebble geological tunnel which is dug just well is pushed, air is filled into the special-shaped transmission bag (81) through the opening end of the special-shaped transmission bag (81), the air blows up the extrusion end of the special-shaped transmission bag (81) in the inclined hole (7), the extrusion rod (82) props against the inner wall of the tunnel, the latch (87) is clamped into the tooth groove (84) and is inflated continuously, the extrusion end of the special-shaped transmission bag (81) in the guide hole (6) is inflated to enable the top head (95) in the injection mechanism (9) to prop against the inner wall of the tunnel, concrete is filled into the injection bag (92) through the opening of the injection bag (92), the injection bag (92) is propped up to deform, the top prick (96) penetrates into the injection groove (97), and the concrete is filled into a closed space formed by the force absorption frame (1), the shielding cloth (11) and the extrusion rod (82), so that the installation of the device.
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