CN116971807A - Tunnel excavation supporting structure and construction method - Google Patents
Tunnel excavation supporting structure and construction method Download PDFInfo
- Publication number
- CN116971807A CN116971807A CN202310937536.5A CN202310937536A CN116971807A CN 116971807 A CN116971807 A CN 116971807A CN 202310937536 A CN202310937536 A CN 202310937536A CN 116971807 A CN116971807 A CN 116971807A
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- side arc
- support
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- 230000008093 supporting effect Effects 0.000 title claims abstract description 143
- 238000009412 basement excavation Methods 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000005266 casting Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- 239000004065 semiconductor Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
- E21D19/04—Provisional protective covers for working space for use in drifting galleries
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- 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
-
- 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
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- 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
- E21D15/50—Component parts or details of props
-
- 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
- E21D15/50—Component parts or details of props
- E21D15/54—Details of the ends of props
- E21D15/55—Details of the ends of props of prop heads or feet
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/08—Advancing mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel excavation supporting structure and a construction method, and relates to the technical field of tunnel supporting. The invention comprises a bottom plate, wherein a fixing mechanism is arranged on the bottom plate, two fixing frames are fixedly arranged on the bottom plate, rotating shafts are rotatably arranged on the two fixing frames, a positioning mechanism is arranged between each rotating shaft and the corresponding fixing frame, rotating blocks are fixedly arranged on the two rotating shafts through steering shafts, a plurality of side hydraulic rods are fixedly arranged on the two rotating blocks, supporting side arc plates are fixedly arranged on the side hydraulic rods, and a supporting mechanism is arranged on each supporting side arc plate. The advantages are that: the invention can rapidly carry out comprehensive support protection on the side surface and the top surface of the tunnel, has higher support efficiency, adopts a mode of concrete auxiliary connection support, can effectively increase the stability of the support, can rapidly disassemble after the support is completed, can be repeatedly used, and saves materials.
Description
Technical Field
The invention relates to the technical field of tunnel support, in particular to a tunnel excavation support structure and a construction method.
Background
In the construction of urban rail transit, tunnel excavation is usually required, and in the process of tunnel excavation, a supporting structure is usually adopted to support the tunnel so as to prevent the tunnel from collapsing in the construction process, so as to ensure the stability of the tunnel;
through searching, the Chinese patent with the patent number of CN202111364535.3 discloses a tunnel excavation supporting structure and a construction method, comprising the following steps: the supporting framework comprises a bottom plate framework and an arch framework, the bottom plate framework is arranged at the bottom of the tunnel, and the arch framework is fixed on the bottom plate framework; the template structure is arranged corresponding to the arch framework and comprises a first template, a second template and a third template; filling concrete layers with the bottom plate framework serving as a support to form a tunnel bottom plate; in the space formed by the template structure and the tunnel, taking the arch skeleton as a support to be filled into the concrete layer to form a tunnel roof;
the above device still has the following disadvantages:
1. the existing device is of a disposable structure, and is usually disassembled in a forced damage mode after tunnel excavation is completed, so that the whole device is damaged greatly, the device cannot be reused, and materials are wasted;
2. the device can not comprehensively support the side face and the top wall of the tunnel, the supporting and protecting effects are poor, the supporting efficiency is low, the device is required to be installed for a long time during supporting, the supporting efficiency is low, and certain limitation is achieved;
therefore, there is a need to design a tunnel excavation supporting structure and a construction method for solving the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a tunnel excavation supporting structure and a construction method, and solves the problems in the prior art.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a tunnel excavation supporting construction, includes the bottom plate, install fixed establishment on the bottom plate, fixed mounting has two mounts on the bottom plate, two all rotate on the mount and install the axis of rotation, and all install positioning mechanism between every axis of rotation and the corresponding mount, two all have the turning block through the steering spindle fixed mounting in the axis of rotation, two all fixed mounting have a plurality of lateral part hydraulic stems on the turning block, and the common fixed mounting has the support side arc board on a plurality of lateral part hydraulic stems, every all install supporting mechanism on the support side arc board;
the utility model discloses a hydraulic pressure system, including bottom plate, support main board, support auxiliary board and support elastic pad, install two slip casting mechanisms on the support main board, two support side arc board and support main board between equal fixed mounting have a plurality of extension spring ropes.
Preferably, the fixing mechanism comprises a plurality of fixing plates fixedly mounted on the bottom plate, and each fixing plate is provided with a positioning drill rod in a sliding manner.
Preferably, the positioning mechanism comprises a telescopic positioning pin fixedly arranged on the rotating shaft, and a plurality of positioning holes matched with the telescopic positioning pin are formed in the fixing frame.
Preferably, the supporting mechanism comprises a pouring frame groove formed in the supporting side arc plate, a pouring pipe I is fixedly mounted on the supporting side arc plate, and the pouring pipe I is communicated with the pouring frame groove.
Preferably, the connecting mechanism comprises a sliding groove formed in the support main board, a deflection shaft is arranged in the sliding groove through a sliding structure, a connecting rod is fixedly arranged on the deflection shaft, the support auxiliary board is rotatably arranged on the connecting rod, a telescopic pin is fixedly arranged on the support auxiliary board, and a clamping hole matched with the telescopic pin is formed in the support main board.
Preferably, the sliding structure comprises a trapezoidal sliding rod fixedly arranged in a sliding groove, a sliding frame is arranged on the trapezoidal sliding rod in a matched sliding manner through a trapezoidal sliding groove, the deflection shaft is rotatably arranged in the sliding frame, and a limiting rod is arranged in the sliding groove in a sliding manner.
Preferably, the grouting mechanism comprises a connecting semi-conductor pipe fixedly mounted on the supporting main board, a pouring semi-conductor pipe is mounted on the connecting semi-conductor pipe in a clamping mode, and a pouring pipe II matched with the pouring semi-conductor pipe is fixedly mounted on the connecting semi-conductor pipe.
The construction method of the tunnel excavation supporting structure comprises the following steps:
s1, when supporting a tunnel, firstly conveying a bottom plate to the position below a position needing to be supported in the tunnel, and then sliding and inserting a plurality of positioning drills on a plurality of fixing plates into the ground of the tunnel, so that the bottom plate can be fixed on the ground of the tunnel, and the supporting stability of the bottom plate is ensured;
s2, after the bottom plate is fixed, an operator can rotate the rotating shaft to drive the steering shaft, the rotating block and the supporting side arc plate to integrally rotate, and the angle position of the supporting side arc plate is adjusted according to the radian of the side surface of the tunnel, so that the supporting side arc plate can be well attached to the side plate of the tunnel;
s3, after adjustment, a plurality of side hydraulic rods are started to push the supporting side arc plates to move, so that the supporting side arc plates can be driven to move and approach the side surfaces of the tunnel until the supporting side arc plates are completely extruded and attached to the side surfaces of the tunnel, and the side surfaces of the tunnel can be supported and protected;
s4, after the two support side arc plates are supported, an external concrete grouting guide pipe can be inserted into a first pouring pipe on the support side arc plates, grouting is started, concrete can be injected into a pouring frame groove in the support side arc plates, and after the concrete is solidified, the integrity of the support side arc plates and the side surfaces of the tunnel can be improved, so that the support stability of the side surfaces is further improved;
s5, after the side surface is supported, the supporting auxiliary plate can slide out of the side edge of the supporting main plate to enable the supporting auxiliary plate to slide to be flush with the supporting main plate and fix the supporting main plate, and then a plurality of jacking hydraulic rods are started to drive the supporting main plate and the supporting auxiliary plate to rise together until the supporting main plate and the supporting auxiliary plate are extruded and attached to the top of the tunnel, so that the top wall of the tunnel can be supported and protected;
s6, after the supporting main board is supported, the two pouring half pipes can be clamped into the two connecting half pipes, then an external concrete grouting guide pipe is inserted into the second pouring pipe on the connecting half pipes, grouting is started, concrete can be injected into the pouring half pipes, the concrete is fused with the top wall of the tunnel, and after the concrete is solidified, the supporting stability of the top wall can be further improved;
and S7, when the tunnel is excavated without supporting, the external cutting machine is only required to cut the concrete at the first pouring pipe on the supporting side arc plate to separate the concrete from the supporting side arc plate, then the concrete at the second pouring pipe on the connecting guide half pipe is cut to separate the concrete from the connecting guide half pipe, and then the jacking hydraulic rod and the lateral hydraulic rod are started to recover the supporting main plate and the supporting side arc plate, so that the whole recovery of the device can be completed, and the supporting work of the next tunnel can be carried out.
The invention provides a tunnel excavation supporting structure and a construction method. The beneficial effects are as follows:
1. according to the invention, through the arrangement of the bottom plate, the bottom plate is conveyed to the position below a position needing to be supported in the tunnel when the tunnel is supported, and a plurality of positioning drills on a plurality of fixing plates are inserted into the ground of the tunnel in a sliding manner, so that the bottom plate is fixed on the ground of the tunnel, and the overall support stability of the device is ensured.
2. According to the invention, through the arrangement of the support side arc plates, the support side arc plates can be subjected to angle adjustment under the cooperation of the rotating shaft steering shaft and the rotating block, and the angle positions of the support side arc plates can be adjusted according to the radian of the tunnel side plates, so that the support side arc plates are tightly attached to the side surfaces of the tunnel.
3. According to the invention, through the arrangement of the pouring frame grooves, after the supporting side arc plates are supported, the external concrete grouting guide pipe is inserted into the pouring pipe I on the supporting side arc plates and grouting is carried out, and the pouring frame grooves in the supporting side arc plates are bonded with the side surfaces of the tunnel by using concrete, so that the integrity of the supporting side arc plates and the side surfaces of the tunnel can be increased, and the supporting stability of the side surfaces is further increased.
4. According to the invention, through the arrangement of the support main board and the support auxiliary board, the support auxiliary board can slide on the support main board, the whole area of the top wall support can be increased, and the support auxiliary board can be extruded and attached with the top of the tunnel under the cooperation of the jacking hydraulic rod, so that the top wall of the tunnel can be supported and protected, and the support stability is higher.
5. According to the invention, through the arrangement of the pouring half pipe, the pouring half pipe is clamped into the connecting guide half pipe, and then the external concrete grouting guide pipe is inserted into the pouring pipe II on the connecting guide half pipe and grouting is carried out, so that concrete can be injected into the pouring half pipe, and the pouring half pipe is adhered to the top wall of the tunnel by using the concrete, so that the supporting stability of the top wall can be further increased.
In summary, the invention can rapidly carry out comprehensive support protection on the side surface and the top surface of the tunnel, has higher support efficiency, adopts a mode of concrete auxiliary connection support, can effectively increase the stability of the support, can rapidly disassemble after the support is completed, can be repeatedly used, and saves materials.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic structural diagram of a tunnel excavation supporting structure and a construction method according to the present invention;
FIG. 2 is a schematic view of the upper structure of the bottom plate and two support side arc plates of FIG. 1;
FIG. 3 is a schematic view of the upper connecting structure of the fixing frame and steering shaft in FIG. 2;
FIG. 4 is a schematic view of the hydraulic jack in FIG. 1 and the upper structure of the support main;
FIG. 5 is a schematic view of the upper structure of the support main and support sub-plates of FIG. 4;
fig. 6 is an enlarged view of a node at a portion a in fig. 5.
In the figure: the hydraulic support comprises a bottom plate 1, a jacking hydraulic rod 2, a fixing frame 3, a steering shaft 4, a rotating block 5, a side hydraulic rod 6, a side arc plate 7, a main support plate 8, a sub support plate 9, a half casting pipe 10, a tension spring rope 11, a positioning drill rod 12, a casting frame groove 13, a casting pipe I14, a sliding frame 15, a rotating shaft 16, a telescopic positioning pin 17, a positioning hole 18, a connecting half pipe 19, a casting pipe II 20, a supporting elastic pad 21, a sliding groove 22, a telescopic pin 23, a clamping hole 24, a connecting rod 25, a deflection shaft 26 and a fixing plate 27.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-3, a tunnel excavation supporting structure comprises a bottom plate 1, wherein two fixing frames 3 are fixedly installed on the bottom plate 1, rotating shafts 16 are rotatably installed on the two fixing frames 3, rotating blocks 5 are fixedly installed on the two rotating shafts 16 through steering shafts 4, a plurality of side hydraulic rods 6 are fixedly installed on the two rotating blocks 5, supporting side arc plates 7 are fixedly installed on the side hydraulic rods 6 together, and a supporting mechanism is installed on each supporting side arc plate 7;
the following points are notable:
1. the bottom plate 1 is provided with a fixing mechanism, the fixing mechanism comprises a plurality of fixing plates 27 fixedly arranged on the bottom plate 1, and each fixing plate 27 is provided with a positioning drill rod 12 in a sliding manner for fixing the device on the ground of a tunnel, so that the stability of a supporting base is ensured.
2. A positioning mechanism is arranged between each rotating shaft 16 and the corresponding fixing frame 3, the positioning mechanism comprises a telescopic positioning pin 17 fixedly arranged on the rotating shaft 16, a plurality of positioning holes 18 matched with the telescopic positioning pins 17 are formed in the fixing frame 3, and after the angle adjustment of the support side arc plates 7 is finished, the telescopic positioning pins 17 can be pressed to be clamped into the positioning holes 18 at corresponding positions, so that the positions of the rotating shaft 16 and the support side arc plates 7 can be integrally fixed.
3. The supporting mechanism comprises a pouring frame groove 13 formed in the supporting side arc plate 7, a pouring pipe I14 is fixedly mounted on the supporting side arc plate 7, the pouring pipe I14 is communicated with the pouring frame groove 13, and the overall support stability of the supporting side arc plate 7 and the side face of the tunnel is improved by pouring concrete into the pouring frame groove 13.
Referring to fig. 1, 4-6, a plurality of jacking hydraulic rods 2 are fixedly installed on a base plate 1, a supporting main plate 8 is fixedly installed on the jacking hydraulic rods 2 together, a supporting auxiliary plate 9 is installed on the supporting main plate 8 through a connecting mechanism, supporting elastic pads 21 are fixedly installed on the supporting main plate 8 and the supporting auxiliary plate 9, and two grouting mechanisms are installed on the supporting main plate 8;
the following points are notable:
1. the connecting mechanism comprises a sliding groove 22 formed in the support main plate 8, a deflection shaft 26 is arranged in the sliding groove 22 through a sliding structure, a connecting rod 25 is fixedly arranged on the deflection shaft 26, the support auxiliary plate 9 is rotatably arranged on the connecting rod 25, a telescopic pin 23 is fixedly arranged on the support auxiliary plate 9, and a clamping hole 24 matched with the telescopic pin 23 is formed in the support main plate 8 and used for mounting the support auxiliary plate 9 on the support main plate 8, so that the support auxiliary plate 9 can be attached to the support main plate 8 when not in use, transportation is facilitated, and the support auxiliary plate can be pulled out quickly when in support, the contact area of support is increased, and the support stability is increased.
2. The sliding structure comprises a trapezoidal sliding rod fixedly arranged in a sliding groove 22, a sliding frame 15 is arranged on the trapezoidal sliding rod in a matched sliding manner through the trapezoidal sliding groove, a deflection shaft 26 is rotatably arranged in the sliding frame 15, a limiting rod is arranged in the sliding groove 22 in a sliding manner, and the sliding frame 15 can stably slide in the sliding groove 22 without deviation.
3. The grouting mechanism comprises a connecting semi-conducting pipe 19 fixedly arranged on the supporting main board 8, a pouring semi-pipe 10 is clamped and arranged on the connecting semi-conducting pipe 19, and a pouring pipe II 20 matched with the pouring semi-pipe 10 is fixedly arranged on the connecting semi-conducting pipe 19.
4. A plurality of extension spring ropes 11 are fixedly installed between the two support side arc plates 7 and the support main plate 8, the integrity between the support main plate 8 and the support side arc plates 7 is increased through the plurality of extension spring ropes 11, and the stability of integral support is further improved.
The construction method of the tunnel excavation supporting structure comprises the following steps:
s1, when supporting a tunnel, firstly conveying the bottom plate 1 to the position below a position needing to be supported in the tunnel, and then sliding and inserting a plurality of positioning drills 12 on a plurality of fixing plates 27 into the ground of the tunnel, so that the bottom plate 1 can be fixed on the ground of the tunnel, and the supporting stability of the bottom plate 1 is ensured;
s2, after the bottom plate 1 is fixed, an operator can rotate the rotating shaft 16 to drive the steering shaft 4, the rotating block 5 and the supporting side arc plate 7 to integrally rotate, and the angle position of the supporting side arc plate 7 is adjusted according to the radian of the side surface of the tunnel, so that the supporting side arc plate 7 can be well attached to the side plate of the tunnel;
s3, after adjustment, a plurality of side hydraulic rods 6 are started to push the supporting side arc plates 7 to move, so that the supporting side arc plates 7 can be driven to move and approach the side surfaces of the tunnel until the supporting side arc plates 7 are completely extruded and attached to the side surfaces of the tunnel, and the side surfaces of the tunnel can be supported and protected;
s4, after the two support side arc plates 7 are supported, an external concrete grouting guide pipe can be inserted into a first pouring pipe 14 on the support side arc plates 7, grouting is started, concrete can be injected into a pouring frame groove 13 in the support side arc plates 7, and after the concrete is solidified, the integrity of the support side arc plates 7 and the side surfaces of the tunnel can be increased, so that the support stability of the side surfaces is further improved;
s5, after the side surface is supported, the supporting auxiliary plate 9 can slide out of the side edge of the supporting main plate 8 to enable the supporting auxiliary plate to slide to be flush with the supporting main plate 8 and be fixed, and then the plurality of jacking hydraulic rods 2 are started to drive the supporting main plate 8 and the supporting auxiliary plate 9 to ascend together until the supporting main plate and the supporting auxiliary plate are extruded and attached to the top of the tunnel, so that the top wall of the tunnel can be supported and protected;
s6, after the supporting main board 8 is supported, the two pouring half pipes 10 can be clamped into the two connecting half pipes 19, then an external concrete grouting guide pipe is inserted into the pouring pipe II 20 on the connecting half pipes 19, grouting is started, concrete can be injected into the pouring half pipes 10, the concrete is fused with the top wall of the tunnel, and after the concrete is solidified, the supporting stability of the top wall can be further improved;
and S7, when the tunnel is excavated without supporting, the external cutting machine is only required to cut the concrete at the first 14 part of the pouring pipe on the supporting side arc plate 7 to separate the concrete from the supporting side arc plate 7, then the concrete on the second 20 part of the pouring pipe on the connecting semi-conducting pipe 19 is cut to separate the concrete from the connecting semi-conducting pipe 19, and then the jacking hydraulic rod 2 and the side hydraulic rod 6 are started to recover the supporting main plate 8 and the supporting side arc plate 7, so that the whole recovery of the device can be completed, and the supporting work of the next tunnel can be carried out.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a tunnel excavation supporting construction, includes bottom plate (1), its characterized in that, install fixed establishment on bottom plate (1), fixed mounting has two mount (3) on bottom plate (1), two all rotate on mount (3) and install axis of rotation (16), and all install positioning mechanism between every axis of rotation (16) and the corresponding mount (3), two all have rotating block (5) through steering shaft (4) fixed mounting on axis of rotation (16), two all fixed mounting has a plurality of lateral part hydraulic stems (6) on rotating block (5), and jointly fixed mounting has support side arc board (7) on a plurality of lateral part hydraulic stems (6), every support side arc board (7) all installs supporting mechanism;
a plurality of jacking hydraulic rods (2) are fixedly arranged on the bottom plate (1), a supporting main plate (8) is fixedly arranged on the jacking hydraulic rods (2), a supporting auxiliary plate (9) is arranged on the supporting main plate (8) through a connecting mechanism, and support main board (8), support and all fixed mounting have on auxiliary board (9) and support elastic pad (21), install two slip casting mechanisms on supporting main board (8), two all fixed mounting has a plurality of extension spring ropes (11) between supporting side arc board (7) and supporting main board (8).
2. A tunnel excavation supporting structure as claimed in claim 1, wherein the fixing means comprises a plurality of fixing plates (27) fixedly mounted on the base plate (1), each fixing plate (27) being slidably mounted with a positioning pin (12).
3. The tunnel excavation supporting structure according to claim 1, wherein the positioning mechanism comprises a telescopic positioning pin (17) fixedly mounted on a rotating shaft (16), and the fixing frame (3) is provided with a plurality of positioning holes (18) matched with the telescopic positioning pin (17).
4. The tunnel excavation supporting structure according to claim 1, wherein the supporting mechanism comprises a pouring frame groove (13) formed in the supporting side arc plate (7), a pouring first pipe (14) is fixedly installed on the supporting side arc plate (7), and the pouring first pipe (14) is communicated with the pouring frame groove (13).
5. The tunnel excavation supporting structure according to claim 1, wherein the connecting mechanism comprises a sliding groove (22) formed in the supporting main board (8), a deflection shaft (26) is installed in the sliding groove (22) through the sliding structure, a connecting rod (25) is fixedly installed on the deflection shaft (26), the supporting auxiliary board (9) is rotatably installed on the connecting rod (25), a telescopic pin (23) is fixedly installed on the supporting auxiliary board (9), and a clamping hole (24) matched with the telescopic pin (23) is formed in the supporting main board (8).
6. The tunnel excavation supporting structure according to claim 5, wherein the sliding structure comprises a trapezoidal sliding rod fixedly installed in a sliding groove (22), a sliding frame (15) is slidably installed on the trapezoidal sliding rod through the matching of the trapezoidal sliding groove, a deflection shaft (26) is rotatably installed in the sliding frame (15), and a limiting rod is slidably installed in the sliding groove (22).
7. The tunnel excavation supporting structure according to claim 1, wherein the grouting mechanism comprises a connection semi-conducting pipe (19) fixedly installed on the supporting main board (8), a pouring semi-pipe (10) is installed on the connection semi-conducting pipe (19) in a clamping mode, and a pouring pipe II (20) matched with the pouring semi-pipe (10) is fixedly installed on the connection semi-conducting pipe (19).
8. A method of constructing a tunnel excavation supporting structure as claimed in any one of claims 1 to 7, comprising the steps of:
s1, when the tunnel is supported, firstly conveying the bottom plate (1) to the position below a position where the tunnel is required to be supported, and then sliding and inserting a plurality of positioning drills (12) on a plurality of fixing plates (27) into the ground of the tunnel, so that the bottom plate (1) can be fixed on the ground of the tunnel, and the support stability of the bottom plate (1) is ensured;
s2, after the bottom plate (1) is fixed, an operator can rotate the rotating shaft (16) to drive the steering shaft (4), the rotating block (5) and the supporting side arc plate (7) to integrally rotate, and the angle position of the supporting side arc plate (7) is adjusted according to the radian of the side surface of the tunnel, so that the supporting side arc plate (7) can be well attached to the side plate of the tunnel;
s3, after adjustment, a plurality of side hydraulic rods (6) are started to push the supporting side arc plates (7) to move, so that the supporting side arc plates (7) can be driven to move and approach the side surfaces of the tunnel until the supporting side arc plates (7) are completely extruded and attached to the side surfaces of the tunnel, and the side surfaces of the tunnel can be supported and protected;
s4, after the two support side arc plates (7) are supported, an external concrete grouting guide pipe can be inserted into a pouring pipe I (14) on the support side arc plates (7), grouting is started, concrete can be injected into a pouring frame groove (13) in the support side arc plates (7), and after the concrete is solidified, the integrity of the support side arc plates (7) and the side face of a tunnel can be improved, so that the support stability of the side face is further improved;
s5, after the side surface is supported, the supporting auxiliary plate (9) can slide out from the side edge of the supporting main plate (8) to enable the supporting auxiliary plate to slide to be flush with the supporting main plate (8) and be fixed, and then the plurality of jacking hydraulic rods (2) are started to drive the supporting main plate (8) and the supporting auxiliary plate (9) to ascend together until the supporting auxiliary plate and the top wall of the tunnel are extruded and attached to each other, so that the top wall of the tunnel can be supported and protected;
s6, after the supporting main board (8) is supported, the two pouring half pipes (10) can be clamped into the two connecting half pipes (19), then an external concrete grouting guide pipe is inserted into the pouring pipe II (20) on the connecting half pipes (19), grouting is started, concrete can be injected into the pouring half pipes (10), the concrete is fused with the top wall of the tunnel, and after the concrete is solidified, the supporting stability of the top wall can be further improved;
s7, when the tunnel is excavated without supporting, the external cutting machine is only required to cut the concrete at the first casting pipe (14) on the supporting side arc plate (7) to separate the concrete from the supporting side arc plate (7), then the concrete on the second casting pipe (20) on the connecting semi-conducting pipe (19) is cut to separate the concrete from the connecting semi-conducting pipe (19), and then the lifting hydraulic rod (2) and the lateral hydraulic rod (6) are started to recover the supporting main plate (8) and the supporting side arc plate (7), so that the whole recovery of the device can be completed, and the supporting work of the next tunnel can be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310937536.5A CN116971807A (en) | 2023-07-28 | 2023-07-28 | Tunnel excavation supporting structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310937536.5A CN116971807A (en) | 2023-07-28 | 2023-07-28 | Tunnel excavation supporting structure and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117948163A (en) * | 2024-03-26 | 2024-04-30 | 洛阳展尚建筑工程有限公司 | Supporting frame for preventing tunnel from collapsing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117948163A (en) * | 2024-03-26 | 2024-04-30 | 洛阳展尚建筑工程有限公司 | Supporting frame for preventing tunnel from collapsing |
| CN117948163B (en) * | 2024-03-26 | 2024-06-11 | 洛阳展尚建筑工程有限公司 | Supporting frame for preventing tunnel from collapsing |
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