CN111472836A - Flexible recyclable retaining wall and construction method thereof - Google Patents
Flexible recyclable retaining wall and construction method thereof Download PDFInfo
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- CN111472836A CN111472836A CN202010282306.6A CN202010282306A CN111472836A CN 111472836 A CN111472836 A CN 111472836A CN 202010282306 A CN202010282306 A CN 202010282306A CN 111472836 A CN111472836 A CN 111472836A
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- 238000010276 construction Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 202
- 239000010959 steel Substances 0.000 claims abstract description 202
- 239000004744 fabric Substances 0.000 claims abstract description 44
- 239000004746 geotextile Substances 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 58
- 229910052742 iron Inorganic materials 0.000 claims description 29
- 239000011435 rock Substances 0.000 claims description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 239000004567 concrete Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 238000005065 mining Methods 0.000 description 6
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005429 filling process Methods 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
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- 238000007906 compression Methods 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- 239000011083 cement mortar Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
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Abstract
The invention provides a flexible recyclable retaining wall and a construction method thereof. This flexible recoverable barricade includes: the outer framework layer is composed of an outer framework arranged close to the wall of the roadway, an inner framework composed of a plurality of transverse steel beams and longitudinal steel beams arranged at preset intervals in the transverse and longitudinal directions, and an outer framework layer composed of first anchor rods; the outer frame comprises roof steel beams arranged close to the wall body of the roof of the roadway, side steel beams arranged close to the left wall body and the right wall body of the roadway and a bottom plate; two ends of the top plate steel beam, the side wall steel beam, the transverse steel beam and the longitudinal steel beam are respectively and correspondingly fixedly connected with one end of a first anchor rod, and the other end of the first anchor rod is respectively and correspondingly fixed on a roadway top plate, a roadway left wall body, a roadway right wall body and a roadway bottom plate, so that the external framework layer is formed; and an intermediate baffle layer and an inner filter cloth layer. The baffle plate is stable in structure and has excellent compressive strength. The construction method reasonably utilizes the waste steel rails, the wire netting and the geotextile, and has the advantages of quick construction, low price, safety, recoverability and wide application range.
Description
Technical Field
The invention relates to the technical field of filling mining, in particular to a flexible recyclable retaining wall and a construction method thereof.
Background
In the present tail sand filling process in the pit, the traditional filling retaining wall mainly comprises a bricklaying block retaining wall and a concrete retaining wall. However, the block retaining wall has the disadvantages of poor bending resistance, easy generation of local displacement deformation, collapse and slurry leakage, thick wall, large block transportation amount and poor water filtering effect. Although the concrete retaining wall has high strength and good overall performance, the concrete has certain gelation and shrinkage, so that the strength of the roadway wall is not high, the maintenance period is longer, the construction cost is high, and the concrete retaining wall cannot be recycled. And the acquisition of the traditional filling retaining wall to the construction materials is easy to compete with production activities such as mining and the like on the transportation level, and the mutual influence is easy to cause. Therefore, in order to solve the problem of large number of communication channels and large height of the filled empty area, the retaining wall with the original traditional structure needs to be improved.
Utility model patent application No. CN201720434830.4 discloses a mining light-duty filling retaining wall. The structure of this retaining wall does: with reinforcing bar net ligature on the steel skeleton, the plank is fixed on the reinforcing bar net, and gunny bag piece and geotechnological cloth are fixed on the plank in proper order, and the steel skeleton is fixed and is constituted the wall body in the tunnel, be equipped with the bottom plate bearing diagonal between wall body and the tunnel bottom plate, be equipped with the roof bearing diagonal between wall body and the tunnel roof, be equipped with the strainer on the wall body and reserve the manhole, the one end of strainer is established at the wall body inboard, and the other end of strainer is established in the wall body outside, be equipped with wooden manhole plate washer on the reservation manhole. And on the inner side of the wall body, a wood block and red brick mortar structure is adopted between the roadway top plate and the roadway side, the gunny bag sheet and the geotextile are extended out of the roadway bottom plate and are placed in the bottom groove, and cement mortar is used for pouring tightly on the inner side and the outer side of the bottom groove. But the structure of this retaining wall is comparatively complicated, consume the material many, and operation process is loaded down with trivial details, simultaneously because the plank needs to use nail and iron wire ligature rigid coupling, retrieves the difficulty, and the rate of reuse is low, uneconomic environmental protection.
The utility model patent with application number CN201820993355.9 discloses a permeable reaction filling retaining wall that mine underground tailings water normal position was handled. And constructing a flexible closed water-filtering retaining wall at the bottom of the stope at the opening of the roadway needing to be closed before filling after stope stoping is finished. The retaining wall skeleton is formed by welding an anchor rod embedded into the surrounding rock and two layers of reinforcing steel bar meshes. And binding a metal mesh on the inner layer steel bar mesh, and arranging a water filtering material between the metal mesh and the steel bar mesh and covering the whole roadway section. Corrugated pipe PRB reaction units with through holes are vertically arranged in parallel in the two layers of steel bar nets, functional active fillers are filled in the corrugated pipe PRB reaction units, and the corrugated pipe PRB reaction units are fixed with the inner layer of steel bar nets. And the reinforcing mesh is completely filled by adopting sprayed concrete to form a retaining wall with a certain thickness. Although the retaining wall overcomes the problems of material taking, water seepage and the like which are difficult to solve on site to a certain extent, the application is relatively limited, the retaining wall can only be blocked by combining a tailing filling method in real time, and the application in other directions is limited to a certain extent.
Utility model patent with application number CN201621291800.4 discloses a novel flexible filling isolation retaining wall. The retaining wall comprises a plurality of mortar anchor rods which are arranged in parallel, wherein the anchor rods are uniformly and symmetrically distributed in rock masses on two sides, part of the anchor rods penetrate into the rock masses and part of the anchor rods are exposed, a circular ring is arranged at the end part of each exposed anchor rod, and the circular rings are positioned in the same plane; a plurality of support tubes which are arranged in parallel and are vertical to the anchor rods are placed on the plane where the circular rings are located, support tube holes are formed in the connection positions of the support tubes and the circular rings at the end parts of each pair of symmetrical anchor rods, steel wire ropes penetrate through the middles of each pair of symmetrical circular rings and the support tube holes, and the two ends of each steel wire rope are fixed through fixing pieces; the device also comprises a plurality of isolation plates which are tightly attached to the inner side of the supporting tube, and the isolation plates are connected with the supporting tube through connecting pieces; the inner walls of the rock masses at the inner side and the two sides of the isolation plate and the bottom plate of the connecting channel are adhered with nylon cloth and fixed by pressing strips and connecting pieces. But the strength of the retaining wall roadway top wall is not high, the blocking is not tight, slurry leakage is easy to occur, the compression resistance and the structural strength are not greatly improved, and the retaining wall is easy to stress, extrude and deform.
In view of the above, there is a need for an economical, environment-friendly and recyclable flexible light retaining wall with excellent compressive capacity and a wide application range and a construction method thereof, so as to meet the requirements of practical mine applications.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a flexible recyclable retaining wall which is quick in construction, low in price, convenient to operate, economical, environment-friendly and recyclable, has excellent compression resistance and is wide in application range and a construction method thereof.
To achieve the above objects, the present invention provides a flexible, recyclable retaining wall. Flexible recoverable barricade outside-in includes in proper order:
the outer framework layer comprises an outer frame arranged close to the wall of the roadway, an inner frame consisting of a plurality of transverse steel beams and longitudinal steel beams which are arranged at preset intervals in the transverse and longitudinal directions, and a plurality of first anchor rods; the outer frame comprises a plurality of roof steel beams arranged close to the wall body of the roof of the roadway, and side wall steel beams arranged close to the left wall body and the right wall body of the roadway and the bottom plate of the roadway; the two ends of the top plate steel beam, the two ends of the side wall steel beam, the two ends of the transverse steel beam and the two ends of the longitudinal steel beam are respectively abutted against the roadway wall and correspondingly fixedly connected with one ends of a plurality of first anchor rods, and the other ends of the plurality of first anchor rods are respectively and correspondingly fixed on a roadway top plate, a roadway left and right wall body and a roadway bottom plate, so that the external framework layer is formed;
the middle baffle layer consists of a plurality of iron wire meshes, and the iron wire meshes are paved and fixed on the outer framework layer to form a baffle wall;
the inner filter cloth layer is of a double-layer structure and comprises a first filter cloth layer and a second filter cloth layer which are mutually overlapped and laid on the wall surface of the baffle wall;
the flexible recoverable barricade still is provided with reserve the mouth and cross in the filter tube that the mouth set up is reserved.
Preferably, the transverse steel beams and the longitudinal steel beams are arranged according to a square with a transverse and longitudinal spacing of 600 mm-800 mm, and the transverse steel beams are arranged on the outer sides of the longitudinal steel beams; the outer frame is arranged on the outer side of the transverse steel beam.
Preferably, a steel inclined strut fixed through a second anchor rod is arranged between the outer framework layer and the roadway bottom plate.
Preferably, in the steel bracket, the steel beam raw materials of the top plate steel beam, the side wall steel beam, the transverse steel beam and the longitudinal steel beam are all I-shaped steel; the welding length of the I-shaped steel and the first anchor rod is more than or equal to 300 mm; the first anchor rod is further used for reinforcing the top plate steel beam and the side slope steel beam body, and the drilling distance is 400-600 mm.
Preferably, the first anchor rod is a round steel anchor rod, and the length of the first anchor rod is 1200-1600 mm; the connecting part of the first anchor rod and the surrounding rock of the roadway is more than or equal to 500mm, and the first anchor rod is filled in by adopting a reverse wedge method or is fixed by adopting an anchoring agent.
Preferably, a third anchor rod is used for reinforcing the position where the roof steel beam and the wall body of the roadway roof are in large contact gap; the third anchor rod is a deformed steel bar anchor rod or a round steel bar anchor rod.
Preferably, the reserved opening is arranged at a position which is away from the roadway bottom plate from bottom to top and is between the first transverse steel beam and the second transverse steel beam, and the size of the reserved opening is 600-800 mm square; and after the whole sealing is finished, sealing the reserved opening by using a steel wire mesh.
Preferably, the fixing mode of the inner filter cloth layer is as follows: fixing the peripheral edge of the inner filter cloth layer into a rock wall by using a flat iron and expansion screw combined fixing piece along the roadway side wall on the inner side of the outer frame; the first filter cloth layer and the second filter cloth layer are both geotextiles.
Preferably, the iron wire mesh sheets at the peripheral edge position in the middle baffle layer are connected and fixed with the rock wall by a screw steel fixing piece along the roadway wall.
In order to achieve the purpose, the invention also provides a construction method of the flexible recyclable retaining wall, which comprises the following steps:
s1, outer carcass layer arrangement:
s11, outer frame arrangement: after the closed opening is cleaned and pretreated, arranging a plurality of roof steel beams on a wall body of a roof of a roadway close to the closed opening, arranging side wall steel beams on a left wall body, a right wall body and a roadway bottom plate of the roadway close to the closed opening, and fixing two ends of the roof steel beams and the side wall steel beams by using the first anchor rods; the first anchor rod is also used for reinforcing the top plate steel beam and the side wall steel beam body; reinforcing the position, where the contact gap between the roof steel beam and the wall body of the roadway roof is large, by using a third anchor rod;
s12, inner frame arrangement: arranging the transverse steel beams and the longitudinal steel beams according to a square with a transverse and longitudinal distance of 600-800 mm, wherein the transverse steel beams are correspondingly abutted against left and right wall bodies of a roadway from left to right, and the longitudinal steel beams are correspondingly abutted against a top plate and a bottom plate of the roadway from top to bottom and are fixed by the first anchor rods; the transverse steel beam is arranged on the outer side of the longitudinal steel beam in a welding mode; the outer frame is arranged on the outer side of the transverse steel beam, so that the outer framework layer is arranged;
s2, intermediate baffle layer arrangement: the middle baffle layer consists of a plurality of iron wire meshes, and the iron wire meshes are paved and fixed on the outer framework layer to form a baffle wall; the iron wire mesh sheets at the peripheral edge positions are connected and fixed with the rock wall by a thread steel fixing piece along the wall of the roadway wall;
s3, arranging an inner filter cloth layer: the first filter cloth layer and the second filter cloth layer are mutually overlapped and laid on the wall surface of the baffle wall; fixing the peripheral edge of the inner filter cloth layer into a rock wall by using a flat iron and expansion screw combined fixing piece along the roadway side wall on the inner side of the outer frame;
s4, flexible recoverable baffle arrangement: a steel inclined strut fixed through a second anchor rod is arranged between the outer framework layer and the roadway bottom plate; the distance from the bottom to the top direction the roadway bottom plate is the first way and the second way the position between the transverse steel beams is provided with the reserved opening with the size of 600 mm-800 mm square and the filter pipe which is transversely crossed with the reserved opening, so that the flexible recoverable retaining wall is obtained.
Compared with the prior art, the invention has the beneficial effects that:
1. the flexible recoverable retaining wall provided by the invention is composed of an outer framework layer, an intermediate baffle layer and an inner filter cloth layer, and the flexible retaining wall is manufactured by reasonably and secondarily utilizing waste steel rails, anchor rods, wire netting and geotextile in combination according to local conditions so as to replace part of retaining walls with concrete structures and achieve the function and effect of safely protecting the recoverable flexible retaining wall. The design of the flexible recyclable retaining wall structure is beneficial to the construction of green, environment-friendly and sustainable development of mines; the defects that the rigid material is relatively brittle and easy to break, has no buffer room and is easy to directly damage and lose energy are overcome; the problems that the traditional reinforced concrete and red brick frameworks are easy to consume materials and delay the construction period are solved; the method is more beneficial to solving the problems of acquisition of construction materials and limited resource conditions such as easy competition for transportation with production activities such as mining and the like on the transportation level. The retaining wall structure design has experimental application in the construction of a partial mine large-stage subsequent filling mining method route filling retaining wall, and a good effect is achieved.
2. According to the flexible recoverable retaining wall provided by the invention, the outer framework layer consists of the outer frame which is arranged close to the wall of the roadway and the inner frame which consists of the transverse steel beams and the longitudinal steel beams which are arranged at preset intervals in the transverse and longitudinal directions, and the inner frame and the outer frame are fixed through anchoring and welding, so that the formed outer framework layer is stable in structure, has excellent compressive strength, and is not easy to generate local displacement deformation. And the structural design of the framework layer can improve the strength of the roadway roof and the roadway wall body to a great extent, and overcomes the defects that in the prior art, plugging is not tight and slurry leakage easily occurs. Meanwhile, an anchored I-shaped steel inclined support is further arranged between the outer framework layer and the roadway bottom plate, so that the stability and the compressive strength of the outer framework layer are further enhanced, and the construction safety in the filling process is favorably ensured. Meanwhile, the structural design of the outer frame can provide support for fixing the peripheral edge parts of the middle baffle layer and the inner filter cloth layer, so that a better plugging function is exerted.
3. The construction method of the flexible recyclable retaining wall provided by the invention has the advantages of quick construction, low price, convenience in operation, safety, reliability, environmental friendliness, wide application range and huge application potential.
Drawings
Fig. 1 is a schematic structural view of a flexible recyclable baffle wall provided by the invention.
Fig. 2 is a schematic structural view of an outer framework layer of the flexible recyclable retaining wall according to the present invention.
Fig. 3 is a schematic diagram of the construction of an intermediate deck of a flexible, recyclable retaining wall according to the present invention.
Fig. 4 is a schematic structural view of an internal filter cloth layer of the flexible recyclable retaining wall according to the present invention.
Fig. 5 is a schematic side view of the flexible recyclable retaining wall according to the present invention.
Fig. 6 is a plugging diagram of a preformed hole of the flexible recyclable retaining wall provided by the invention.
Fig. 7 is a diagram of a flexible recyclable retaining wall according to embodiment 1 of the present invention.
Fig. 8 is an overall object diagram of the flexible recyclable retaining wall according to embodiment 1 of the present invention.
Reference numerals:
10. an outer carcass layer; 11. a roof steel beam; 12. a steel side girder; 13. a transverse steel beam; 14. a longitudinal steel beam; 15. a first anchor rod; 16. a third anchor rod; 17. reserving a port; 18. a steel diagonal brace; 19. a second anchor rod; 20. an intermediate baffle layer; 21. an iron wire mesh sheet; 22. a deformed steel bar fixing member; 30. a first filter cloth layer; 31. the flat iron and the expansion screw are combined with the fixing piece; 40. a second filter cloth layer; 50. and a filter pipe.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The invention provides a construction method of a flexible recyclable retaining wall, which comprises the following steps:
s1, the outer skeleton layer 10 is arranged:
s11, outer frame arrangement: after the closed opening is cleaned and pretreated, a plurality of roof steel beams 11 are arranged on the wall body of the roof of the roadway close to the closed opening, side wall steel beams 12 are arranged on the wall body of the roadway close to the left wall body and the right wall body of the closed opening and the roadway bottom plate, and two ends of the roof steel beams 11 and the side wall steel beams 12 are fixed by the first anchor rods 15; the first anchor rod 15 is also used for reinforcing the body of the roof steel beam 11 and the side steel beam 12;
s12, inner frame arrangement: the transverse steel beams 13 and the longitudinal steel beams 14 are arranged according to the square with the transverse and longitudinal spacing of 600 mm-800 mm, the transverse steel beams 13 are correspondingly abutted against the left wall and the right wall of the roadway from left to right, and the longitudinal steel beams 14 are correspondingly abutted against the top plate and the bottom plate of the roadway from top to bottom and are fixed by the first anchor rods 15; the transverse steel beam 13 is arranged on the outer side of the longitudinal steel beam 14 in a welding mode; the outer frame is disposed outside the cross steel beam 13, thereby arranging the outer skeleton layer 10;
s2, intermediate barrier layer 20 disposition: the middle baffle layer 20 is composed of a plurality of iron wire meshes 21, and the iron wire meshes 21 are paved and fixed on the outer framework layer 10 to form a baffle wall; the iron wire mesh sheets 21 at the peripheral edge positions are connected and fixed with the rock wall by screw steel fixing pieces 22 along the roadway wall;
s3, arranging an inner filter cloth layer: the first filter cloth layer 30 and the second filter cloth layer 40 are mutually overlapped and laid on the wall surface of the baffle wall; fixing the peripheral edge of the inner filter cloth layer to the rock wall by using a flat iron and expansion screw combined fixing piece 31 along the roadway side wall on the inner side of the outer frame;
s4, flexible recoverable baffle arrangement: a steel inclined strut 18 fixed through a second anchor rod 19 is arranged between the outer framework layer 10 and the roadway bottom plate; the reserved opening 17 with the size of 600 mm-800 mm square and the filter pipe 50 transversely penetrating the reserved opening 17 are arranged at the position between the transverse steel beams 13 at the distance from the bottom to the top, so that the flexible recoverable retaining wall is obtained.
The construction method of the flexible recyclable retaining wall provided by the invention is further described in detail by specific embodiments.
Example 1
The embodiment provides a construction method of a flexible recyclable retaining wall, which comprises the following steps:
s1, the outer skeleton layer 10 is arranged:
s11, outer frame arrangement: the closed opening is cleaned downwards to the surrounding rock, the height of the closed opening is 4100mm, and the width of the closed opening is 4200 mm; i-shaped steel on the periphery of the closed opening is arranged into an outer frame by the wall of the roadway wall, so that subsequent geotextile fixing work is facilitated; the method comprises the following specific steps: arranging three roof steel beams 11 on a wall body bent close to a roof of a closed opening roadway, arranging three side wall steel beams 12 at the left part/the right part/the bottom part on the left wall body, the right wall body and a roadway bottom plate of the closed opening roadway, and fixing two ends of the roof steel beams 11 and the side wall steel beams 12 by using the first anchor rods 15; the first anchor rods 15 are also used for reinforcing the steel roof beam 11 and the steel side wall beam 12, and the drilling distance is 500 mm;
in the steel bracket, the steel beam raw materials of the top plate steel beam 11, the side wall steel beam 12, the transverse steel beam 13 and the longitudinal steel beam 14 are I-shaped steel of I20a model; the welding length of the I-shaped steel and the first anchor rod 15 is 0.7 m;
the first anchor rod 15 is a round steel anchor rod with the model diameter of phi 36, and the length of the round steel anchor rod is 1.2 m; the connecting part of the first anchor rod 15 and the surrounding rock of the roadway is 0.5m, and the first anchor rod 15 is fixed by adopting an anchoring agent;
reinforcing the position, where the contact gap between the roof steel beam 11 and the wall body of the roadway roof is large, by using a third anchor rod 16; the third anchor rod 16 is a round steel anchor rod with the model diameter of phi 36;
s12, inner frame arrangement: the transverse steel beams 13 and the longitudinal steel beams 14 are arranged at a transverse-longitudinal interval of 0.8m by 0.8m, the three transverse steel beams 13 are correspondingly abutted against the left wall and the right wall of the roadway from left to right, and the two longitudinal steel beams 14 are correspondingly abutted against the top plate and the bottom plate of the roadway from top to bottom and are fixed by the first anchor rods 15; the transverse steel beam 13 is arranged on the outer side of the longitudinal steel beam 14 in a welding mode; the outer frame is disposed outside the cross steel beam 13, thereby arranging the outer skeleton layer 10;
s2, intermediate barrier layer 20 disposition: the middle baffle layer 20 consists of a plurality of No. 8 iron wire meshes 21, and the iron wire meshes 21 are paved and fixed on the outer framework layer 10 to form a baffle wall; the iron wire mesh sheets 21 at the peripheral edge positions are connected and fixed with the rock wall by screw steel fixing pieces 22 along the roadway wall;
s3, arranging an inner filter cloth layer: the first filter cloth layer 30 and the second filter cloth layer 40 are mutually overlapped and laid on the wall surface of the baffle wall; fixing the peripheral edge of the inner filter cloth layer to the rock wall by using a flat iron and expansion screw combined fixing piece 31 along the roadway side wall on the inner side of the outer frame;
s4, flexible recoverable baffle arrangement: a steel inclined strut 18 fixed through a second anchor rod 19 is arranged between the outer framework layer 10 and the roadway bottom plate; the steel inclined strut 18 is I-shaped steel I20a model, the second anchor rod 19 is a round steel anchor rod phi 36, and the connecting part of the second anchor rod and the surrounding rock of the roadway is 0.3 m; then, the reserved opening 17 with the size of 0.8m by 0.8m and the filter pipe 50 arranged transversely to the reserved opening 17 are arranged at a position between the first cross steel beam 13 and the second cross steel beam 13 of the roadway bottom plate from bottom to top, so that the flexible recoverable retaining wall is obtained.
Referring to fig. 1, the flexible recyclable retaining wall comprises an outer framework layer 10, an intermediate baffle layer 20 and an inner filter cloth layer from outside to inside in sequence.
Referring to fig. 2, the outer framework layer 10 includes an outer frame disposed close to the wall of the roadway, an inner frame composed of a plurality of horizontal steel beams 13 and vertical steel beams 14 disposed at predetermined intervals in the horizontal and vertical directions, and a plurality of first anchor rods 15; the outer frame comprises a plurality of roof steel beams 11 arranged close to the wall body of the roof of the roadway and side wall steel beams 12 arranged close to the left wall body, the right wall body and the bottom plate of the roadway; the two ends of the top plate steel beam 11, the two ends of the side wall steel beam 12, the two ends of the transverse steel beam 13 and the two ends of the longitudinal steel beam 14 are respectively abutted against the roadway wall and are correspondingly fixedly connected with one ends of the first anchor rods 15, and the other ends of the first anchor rods 15 are respectively and correspondingly fixed on a roadway top plate, a roadway left and right wall body and a roadway bottom plate, so that the outer framework layer 10 is formed. The transverse steel beam 13 is arranged on the outer side of the longitudinal steel beam 14 in a welding mode; the outer frame is disposed outside the transverse steel beam 13.
Referring to fig. 3, the middle baffle layer 20 is composed of a plurality of iron wire mesh sheets 21, and a plurality of iron wire mesh sheets 21 are laid and fixed on the outer skeleton layer 10 to form a baffle wall.
Referring to fig. 4, the inner cloth layers have a double-layered structure, and include a first cloth layer 30 and a second cloth layer 40 stacked on each other and laid on the wall surface of the baffle wall.
The inner frame and the outer frame are fixed through anchoring and welding, and the formed outer framework layer 10 is stable in structure, has excellent compressive strength and is not easy to generate local displacement deformation. And the structural design of the framework layer can improve the strength of the roadway roof and the roadway wall body to a great extent, and overcomes the defects that in the prior art, plugging is not tight and slurry leakage easily occurs. An anchored I-steel inclined strut 18 is further arranged between the outer framework layer 10 and the roadway bottom plate, as shown in fig. 5, so that the stability and the compressive strength of the outer framework layer 10 are further enhanced, and the construction safety in the filling process is favorably ensured.
Referring to fig. 6, the flexible recoverable retaining wall is further provided with a reserved opening 17 and a filtering pipe 50 crossing the reserved opening 17. The reserved opening 17 is arranged at a position which is away from the roadway bottom plate from bottom to top between the first transverse steel beam 13 and the second transverse steel beam 13, and the size of the reserved opening is 0.8m by 0.8 m; and after all sealing is finished, sealing the reserved opening 17 by using a steel wire mesh.
Referring to fig. 7 to 8, the flexible recyclable retaining wall according to the present invention comprises an outer frame layer, an intermediate baffle layer and an inner filter cloth layer, and the flexible retaining wall is manufactured by reasonably and secondarily using the waste steel rails, the anchor rods, the wire netting and the geotextile according to local conditions to replace a part of the retaining wall with a concrete structure, so as to achieve the function and effect of safely protecting the recyclable flexible retaining wall. The retaining wall is economical, environment-friendly and recyclable in design, has excellent pressure resistance and wide application range, is experimentally applied to the construction of the road filling retaining wall by a partial mine large-stage subsequent filling mining method, and achieves good effects.
It should be noted that, in the flexible recoverable retaining wall structure provided by the present invention, the square arrangement of the horizontal and vertical steel beams of the inner frame may also be 0.6m by 0.6m, 0.7m by 0.7m or other size arrangement according to the actual condition and size of the closed opening, the perforation interval of the first anchor rod for reinforcing the steel beam body may also be 400mm, 600mm or other interval, and the length of the first anchor rod may also be 1.3m, 1.5m or other length.
In summary, the invention provides a flexible recyclable retaining wall and a construction method thereof. This flexible recoverable barricade includes: the outer framework layer is composed of an outer framework arranged close to the wall of the roadway, an inner framework composed of a plurality of transverse steel beams and longitudinal steel beams arranged at preset intervals in the transverse and longitudinal directions, and an outer framework layer composed of first anchor rods; the outer frame comprises roof steel beams arranged close to the wall body of the roof of the roadway, side steel beams arranged close to the left wall body and the right wall body of the roadway and a bottom plate; two ends of the top plate steel beam, the side wall steel beam, the transverse steel beam and the longitudinal steel beam are respectively and correspondingly fixedly connected with one end of a first anchor rod, and the other end of the first anchor rod is respectively and correspondingly fixed on a roadway top plate, a roadway left wall body, a roadway right wall body and a roadway bottom plate, so that the external framework layer is formed; and an intermediate baffle layer and an inner filter cloth layer. The baffle plate is stable in structure and has excellent compressive strength. The construction method reasonably utilizes the waste steel rails, the wire netting and the geotextile, and has the advantages of quick construction, low price, safety, recoverability and wide application range.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.
Claims (10)
1. A flexible recoverable barricade, its characterized in that: flexible recoverable barricade outside-in includes in proper order:
the outer framework layer (10) comprises an outer frame arranged close to the wall of the roadway, an inner frame consisting of a plurality of transverse steel beams (13) and longitudinal steel beams (14) which are arranged at preset intervals in the transverse and longitudinal directions, and a plurality of first anchor rods (15); the outer frame comprises a plurality of roof steel beams (11) arranged close to the wall body of the roof of the roadway and side wall steel beams (12) arranged close to the left wall body, the right wall body and the bottom plate of the roadway; the two ends of the top plate steel beam (11), the two ends of the side wall steel beam (12), the two ends of the transverse steel beam (13) and the two ends of the longitudinal steel beam (14) are respectively abutted against the roadway wall and correspondingly fixedly connected with one ends of a plurality of first anchor rods (15), and the other ends of the plurality of first anchor rods (15) are respectively and correspondingly fixed on a roadway top plate, a roadway left and right wall body and a roadway bottom plate, so that the outer framework layer (10) is formed;
the middle baffle layer (20), the middle baffle layer (20) is composed of a plurality of iron wire meshes (21), and the iron wire meshes (21) are paved and fixed on the outer framework layer (10) to form a baffle wall;
the inner filter cloth layer is of a double-layer structure and comprises a first filter cloth layer (30) and a second filter cloth layer (40) which are mutually overlapped and paved on the wall surface of the baffle wall;
the flexible recoverable retaining wall is further provided with a reserved opening (17) and a filter pipe (50) transversely penetrating through the reserved opening (17).
2. The flexible recyclable retaining wall as defined in claim 1, wherein: the transverse steel beams (13) and the longitudinal steel beams (14) are arranged according to a square with a transverse and longitudinal spacing of 600-800 mm, and the transverse steel beams (13) are arranged on the outer sides of the longitudinal steel beams (14); the outer frame is arranged on the outer side of the transverse steel beam (13).
3. The flexible recyclable retaining wall as defined in claim 1, wherein: and a steel inclined strut (18) fixed through a second anchor rod (19) is arranged between the outer framework layer (10) and the roadway bottom plate.
4. The flexible recyclable retaining wall as defined in claim 2, wherein: in the steel bracket, the steel beam raw materials of the top plate steel beam (11), the side wall steel beam (12), the transverse steel beam (13) and the longitudinal steel beam (14) are I-shaped steel; the welding length of the I-shaped steel and the first anchor rod (15) is more than or equal to 300 mm; the first anchor rods (15) are also used for reinforcing the steel roof beam (11) and the steel side wall beam (12) bodies, and the drilling distance is 400-600 mm.
5. The flexible recyclable retaining wall as defined in claim 4, wherein: the first anchor rod (15) is a round steel anchor rod, and the length of the first anchor rod is 1200-1600 mm; first stock (15) and tunnel country rock connecting portion more than or equal to 500mm, first stock (15) adopt the back wedge method to pack into or adopt the anchoring agent fixed.
6. The flexible recyclable retaining wall as defined in claim 5, wherein: a third anchor rod (16) is used for reinforcing the position where the roof steel beam (11) and the wall body of the roadway roof are in large contact gap; the third anchor rod (16) is a deformed steel bar anchor rod or a round steel bar anchor rod.
7. The flexible recyclable retaining wall as defined in claim 1, wherein: the reserved opening (17) is arranged at a position which is away from the roadway bottom plate from bottom to top and is between the first transverse steel beam (13) and the second transverse steel beam (13), and the size of the reserved opening is 600-800 mm square; and after all sealing is finished, sealing the reserved opening (17) by using a steel wire mesh.
8. The flexible recyclable retaining wall as defined in claim 1, wherein: the fixing mode of the inner filter cloth layer is as follows: fixing the peripheral edge of the inner filter cloth layer into a rock wall by using a flat iron and expansion screw combined fixing piece (31) along the roadway side wall on the inner side of the outer frame; the first filter cloth layer (30) and the second filter cloth layer (40) are both geotextiles.
9. The flexible recyclable retaining wall as defined in claim 1, wherein: the iron wire mesh sheets (21) at the peripheral edge positions in the middle baffle layer (20) are connected and fixed with the rock wall by threaded steel fixing pieces (22) along the roadway wall.
10. A construction method of the flexible recyclable retaining wall as described in any one of claims 1 to 9, characterized by: the method comprises the following steps:
s1, outer carcass layer (10) arrangement:
s11, outer frame arrangement: after the closed opening is cleaned and pretreated, a plurality of roof steel beams (11) are arranged on the wall body of the roof of the roadway close to the closed opening, side wall steel beams (12) are arranged on the wall body of the roadway close to the closed opening, the left wall body, the right wall body and the roadway bottom plate, and two ends of the roof steel beams (11) and the side wall steel beams (12) are fixed by the first anchor rods (15); the first anchor rods (15) are also used for reinforcing the bodies of the top plate steel beam (11) and the side wall steel beam (12); a third anchor rod (16) is used for reinforcing the position where the roof steel beam (11) and the wall body of the roadway roof are in large contact gap;
s12, inner frame arrangement: the transverse steel beams (13) and the longitudinal steel beams (14) are arranged according to the square with the transverse and longitudinal spacing of 600-800 mm, the transverse steel beams (13) are correspondingly abutted against the left wall body and the right wall body of the roadway from left to right, and the longitudinal steel beams (14) are correspondingly abutted against the top plate and the bottom plate of the roadway from top to bottom and are fixed by the first anchor rods (15); the transverse steel beam (13) is arranged on the outer side of the longitudinal steel beam (14) in a welding mode; the outer frame is arranged outside the transverse steel beam (13), so that the outer framework layer (10) is arranged;
s2, intermediate barrier layer (20) arrangement: the middle baffle layer (20) is composed of a plurality of iron wire meshes (21), and the iron wire meshes (21) are paved and fixed on the outer framework layer (10) to form a baffle wall; the iron wire mesh (21) at the peripheral edge position is connected and fixed with the rock wall by a screw steel fixing piece (22) along the roadway wall;
s3, arranging an inner filter cloth layer: the first filter cloth layer (30) and the second filter cloth layer (40) are mutually overlapped and laid on the wall surface of the baffle wall; fixing the peripheral edge of the inner filter cloth layer into a rock wall by using a flat iron and expansion screw combined fixing piece (31) along the roadway side wall on the inner side of the outer frame;
s4, flexible recoverable baffle arrangement: a steel inclined strut (18) fixed through a second anchor rod (19) is arranged between the outer framework layer (10) and the roadway bottom plate; the distance from the bottom to the top direction is arranged between the first transverse steel beam (13) and the second transverse steel beam on the roadway bottom plate, the reserved opening (17) with the size of 600-800 mm square and the filter pipe (50) transversely penetrating the reserved opening (17) are arranged, and therefore the flexible recoverable retaining wall is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010282306.6A CN111472836A (en) | 2020-04-11 | 2020-04-11 | Flexible recyclable retaining wall and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010282306.6A CN111472836A (en) | 2020-04-11 | 2020-04-11 | Flexible recyclable retaining wall and construction method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727545A (en) * | 2021-01-28 | 2021-04-30 | 福州大学 | Structure for ventilating underground mine area and construction method thereof |
| CN112922668A (en) * | 2021-03-01 | 2021-06-08 | 中色国际矿业股份有限公司帕鲁特金矿 | Underground filling retaining wall for mine and construction method thereof |
-
2020
- 2020-04-11 CN CN202010282306.6A patent/CN111472836A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727545A (en) * | 2021-01-28 | 2021-04-30 | 福州大学 | Structure for ventilating underground mine area and construction method thereof |
| CN112922668A (en) * | 2021-03-01 | 2021-06-08 | 中色国际矿业股份有限公司帕鲁特金矿 | Underground filling retaining wall for mine and construction method thereof |
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