CN117307215A - Support structure for undercut tunnel - Google Patents
Support structure for undercut tunnel Download PDFInfo
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- CN117307215A CN117307215A CN202311595321.6A CN202311595321A CN117307215A CN 117307215 A CN117307215 A CN 117307215A CN 202311595321 A CN202311595321 A CN 202311595321A CN 117307215 A CN117307215 A CN 117307215A
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- plate
- tunnel
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 6
- 230000000712 assembly Effects 0.000 description 7
- 238000000429 assembly Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 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
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation 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
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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
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a support structure for a subsurface tunnel, which relates to the technical field of tunnel support, and comprises two support frame components and support plate pieces, wherein a connecting slat can be contracted into a storage cavity, and the support structure also comprises a middle support component, at least one side connecting piece is arranged at two ends of the middle support component, and the support frame components can drive the side connecting pieces to move vertically; the middle supporting part comprises a middle supporting bracket, a fixed cross bar piece, rotary supporting arms and a power piece, every two rotary supporting arms are in a group, and the rotary supporting arms respectively corresponding to the two outermost supporting plate strips are connected with the power piece; the power piece can drive the two groups of rotary supporting arms to synchronously rotate around the fixed transverse rod piece in opposite directions. The support mechanism is simple in structure, the whole support mechanism can be disassembled into a plurality of parts, the support mechanism is convenient to carry in a tunnel, the support plate can support the top of the whole tunnel by unfolding, and the support structure is high in strength and strong in practicability.
Description
Technical Field
The invention relates to the technical field of tunnel support, in particular to a support structure for a subsurface tunnel.
Background
Tunnels are engineering structures buried in an underground formation, a form of human use of underground space. Tunnels can be classified into traffic tunnels, hydraulic tunnels, municipal tunnels, mine tunnels, and military tunnels. The tunnel structure comprises a main building and auxiliary equipment. The main building consists of a tunnel body and a tunnel door, and auxiliary equipment comprises a car shelter, a fire-fighting facility, an emergency communication and water-proof facility, and a long tunnel is provided with special ventilation and illumination equipment.
When the tunnel is constructed, a support is required to be arranged in the excavated tunnel so as to support the inner surface of the excavated tunnel, thereby avoiding tunnel collapse. The top wall of the tunnel is mostly of an arc-shaped structure so as to increase the supporting strength of the top of the tunnel; the conventional supporting structure adopted by the tunnel comprises brackets at two sides and an arc-shaped supporting plate at the middle part; two ends of the arc-shaped support plate are arranged on the bracket; the arc support plate is in order to comprehensively support the top of the tunnel, and most of the arc support plate adopts an integral structure, so that the arc support plate is large in size, and the transportation and the installation in the tunnel are troublesome.
Disclosure of Invention
The invention aims to provide a support structure for a subsurface tunnel, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a support structure for undercut tunnel, includes two support frame components and is used for carrying out the support plate spare of supporting to the tunnel roof, the support plate spare includes a plurality of support laths, is connected through the connection lath between two adjacent support plate laths, the support plate lath has and accomodates the chamber and connect the lath and can shrink to accomodate the intracavity portion, still includes middle supporting part, the both ends of middle supporting part all are provided with at least one side connecting piece, side connecting piece can dismantle with the support frame component that is located same one side and support frame component can order about the side connecting piece vertical movement; the middle supporting part comprises a middle supporting bracket, a fixed cross rod piece, rotary supporting arms and a power piece, wherein the side connecting piece is arranged at the end part of the middle supporting bracket, the fixed cross rod piece is fixed at the middle part of the middle supporting bracket, the rotary supporting arms are in a plurality of groups, each two rotary supporting arms are in a group, one end of each rotary supporting arm is fixedly connected with a corresponding supporting plate strip, the other end of each rotary supporting arm is rotationally connected with the fixed cross rod piece, the middle supporting plate strip is fixedly connected with the middle supporting bracket through a middle supporting rod, and the rotary supporting arms respectively corresponding to the two outermost supporting plate strips are connected with the power piece; the power piece can drive the two groups of rotary supporting arms to synchronously rotate around the fixed transverse rod piece in opposite directions.
Based on the technical scheme, the invention also provides the following optional technical schemes:
in one alternative: the power piece comprises a power motor, a wire rod piece and an I-shaped frame, the power motor is arranged on the middle support bracket through a support, one end of the wire rod piece is connected with the output end of the power motor through a coupler, two groups of adjusting support arms are arranged on the I-shaped frame, the end parts, far away from the I-shaped frame, of the adjusting support arms are hinged with connecting sleeves, the connecting sleeves are sleeved on corresponding rotating support arms in a sliding mode, and the wire rod piece spirally penetrates through the middle of the I-shaped frame.
In one alternative: the side parts of two sides of the support plate strip are provided with water collecting tanks communicated with the storage cavity, the port size of each water collecting tank is larger than that of the storage cavity, and the lower side wall of each water collecting tank is provided with a plurality of drain holes close to the edge of each port.
In one alternative: the support frame subassembly includes bed plate, support column, roof board spare, support cylinder and support crossbeam, the bed plate is used for fixed with tunnel ground, and the support column is two and sets up the both ends at the bed plate, and the roof spare is established at the top of support column, support crossbeam is established between two support columns and the tip and the support column sliding fit of support crossbeam, support cylinder establishes on the bed plate and support cylinder's flexible end is connected with support crossbeam, and the tip that intermediate strut part was kept away from to the side connecting piece can dismantle with support crossbeam and be connected.
In one alternative: the side wall of the support column is provided with a guide chute, a sliding block capable of sliding in the guide chute is arranged in the guide chute, the end part of the support beam is fixedly connected with the sliding block, the end part of the side connecting piece, which is far away from the middle supporting part, is clamped on the support beam, the outer side wall of the support column is provided with a reinforcing and supporting part, and the top of the reinforcing and supporting part extends to the upper side of the top plate; when the support plate strips located at the outermost side are pressed against the corresponding top plate element, the support plate strips can drive the lower end parts of the reinforcing support members to extend to the lower side of the sliding blocks.
In one alternative: the reinforcement bearing part comprises a bearing block and a vertical rod piece, one end of the bearing block penetrates through the support column and extends to the inside of the guide chute, the other end of the bearing block is provided with an upward inclined surface, the upper end of the vertical rod piece penetrates through the top plate piece, the lower end of the vertical rod piece is provided with an upper wedge block, a magnetic attraction force smaller than the elasticity of a reset spring is arranged between the lower inclined surface of the upper wedge block and the inclined surface of the bearing block, and the upper wedge block is connected with the top plate piece through the reset spring.
In one alternative: the middle support bracket is a rectangular frame, the side connecting pieces comprise extension rods, mounting sleeves and clamping pieces, the mounting sleeves and the clamping pieces are respectively arranged at two ends of the extension rods, the mounting sleeves are sleeved on the middle support bracket in a sliding mode and are provided with bolt pieces, and the clamping pieces are of U-shaped structures and can be clamped on the supporting cross beams.
Compared with the prior art, the invention has the following beneficial effects:
1. the support plate can be folded and unfolded, and the support plate can support the top wall of the whole tunnel when unfolded, and is convenient to install and transport in the tunnel due to the fact that the size of the support plate is relatively small when folded.
2. The thickness of the connecting batten is smaller than that of the supporting plate, so that water stains on the top wall of the tunnel can be accumulated in a gap between the connecting batten and the top wall of the tunnel, and the water stains are prevented from flowing along the top wall of the tunnel and dripping at a plurality of positions.
3. The support mechanism is simple in structure, the whole support mechanism can be disassembled into a plurality of parts, the support mechanism is convenient to carry in a tunnel, the support plate can support the top of the whole tunnel by unfolding, and the support structure is high in strength and strong in practicability.
Drawings
Fig. 1 is a schematic view of the overall structure of the support structure according to an embodiment of the present invention.
Fig. 2 is a schematic view of the structure of an intermediate support member in one embodiment of the present invention.
FIG. 3 is a schematic view of a support strip according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a support frame assembly according to an embodiment of the present invention.
Fig. 5 is a schematic view of a side connector structure according to an embodiment of the present invention.
Reference numerals annotate: the support frame assembly 100, the base plate 110, the support column 120, the top plate member 130, the guide chute 140, the support cylinder 150, the support beam 160, the slider 170, the support block 180, the vertical bar member 190, the upper wedge 191, the return spring 192, the support plate member 200, the support plate bar 210, the connection bar 220, the receiving chamber 230, the water collecting tank 240, the drain hole 250, the intermediate support member 300, the intermediate support bracket 310, the fixed beam member 320, the intermediate support bar 330, the rotary support arm 340, the power member 350, the power motor 351, the screw member 352, the i-frame 353, the adjustment arm 354, the connection sleeve 355, the side connection member 400, the extension rod 410, the mounting sleeve 420, the clip member 430, and the bolt member 440.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples; in the drawings or description, similar or identical parts are provided with the same reference numerals, and in practical applications, the shape, thickness or height of each part may be enlarged or reduced. The examples set forth herein are intended to be illustrative of the invention and are not intended to limit the scope of the invention. Any obvious modifications or alterations to the invention, as would be apparent, are made without departing from the spirit and scope of the present invention.
In one embodiment, as shown in fig. 1 and 2, a support structure for a undercut tunnel includes two support frame assemblies 100 and a support plate 200 for supporting a top wall of the tunnel, the support plate 200 includes a plurality of support plate bars 210, two adjacent support plate bars 210 are connected by a connecting bar 220, the support bar 210 has a receiving cavity 230, the connecting bar 220 can be retracted into the receiving cavity 230, and an intermediate support member 300, at least one side connector 400 is provided at both ends of the intermediate support member 300, the side connector 400 is detachably connected with the support frame assemblies 100 located at the same side, and the support frame assemblies 100 can drive the side connector 400 to move vertically; the middle supporting component 300 comprises a middle supporting bracket 310, a fixed cross rod piece 320, a rotary supporting arm 340 and a power piece 350, wherein the side connecting piece 400 is arranged at the end part of the middle supporting bracket 310, the fixed cross rod piece 320 is fixed at the middle part of the middle supporting bracket 310, the rotary supporting arms 340 are in a plurality of groups, each two rotary supporting arms 340 are in a group, one end of each rotary supporting arm 340 is fixedly connected with a corresponding supporting lath 210, the other end of each rotary supporting arm 340 is rotationally connected with the fixed cross rod piece 320, the middle supporting lath 210 is fixedly connected with the middle supporting bracket 310 through a middle supporting rod 330, and the rotary supporting arms 340 respectively corresponding to the two outermost supporting laths 210 are connected with the power piece 350; the power member 350 is capable of driving the two sets of rotating support arms 340 to rotate synchronously and in opposite directions about the stationary cross bar member 320;
in the embodiment of the present invention, when the supporting structure is installed, two supporting frame assemblies 100 are respectively fixed on two side walls of the tunnel, and the side connectors 400 on the middle supporting member 300 are connected with the corresponding supporting frame assemblies 100; the support frame assembly 100 drives the side connector 400 to move upward so that the middle support member 300 moves upward and the middle support member 300 drives the support plate member 200 to move vertically; because the plurality of connecting strips 220 can be retracted into the storage cavity 230, the plurality of support plate strips 210 are in a folded state, the body type is relatively small, and the support plate strips 210 cannot collide with other object blocks in the vertical moving process; when the support plate strip 210 at the middle is in arc propped against the top of the tunnel, the power piece 350 drives the two groups of rotary support arms 340 connected with the power piece to rotate around the fixed transverse rod piece 320, and the two groups of rotary support arms 340 respectively drive the corresponding support plate strips 210 to rotate downwards around the fixed transverse rod piece 320 until the side parts of the support plate strips 210 are in contact with the top of the support frame assembly 100; and then a plurality of backplate strips 210 can mutually support to the top of tunnel is strutted, and the installation is convenient, and whole supporting construction divide into a plurality of parts, the transportation and the transport of being convenient for.
In one embodiment, as shown in fig. 2, the power unit 350 includes a power motor 351, a screw unit 352 and an i-frame 353, the power motor 351 is mounted on the middle support bracket 310 through a support, one end of the screw unit 352 is connected with an output end of the power motor 351 through a coupling, the i-frame 353 is provided with two groups of adjusting arms 354, an end of the adjusting arm 354 far from the i-frame 353 is hinged with a connecting sleeve 355, the connecting sleeve 355 is sleeved on the corresponding rotary supporting arm 340, and the screw unit 352 is spirally penetrated through the middle of the i-frame 353; in the embodiment of the present invention, the power motor 351 drives the wire rod member 352 to rotate, the rotating wire rod member 352 drives the spool 353 to vertically move up or down, and the spool 353 pushes and pulls the two sets of rotary support arms 340 to rotate around the axis of the fixed transverse rod member 320 through the two sets of adjusting support arms 354, so that the support plate member 200 can be folded and unfolded.
In one embodiment, as shown in fig. 1 and fig. 3, the two side parts of the supporting strip 210 are provided with water collecting tanks 240 communicated with the containing cavity 230, the port size of the water collecting tanks 240 is larger than the port size of the containing cavity 230, and the lower side wall of the water collecting tanks 240 is provided with a plurality of drain holes 250 near the edge of the port; in the embodiment of the present invention, since the connecting strip 220 can be retracted into the storage cavity 230, the thickness dimension of the connecting strip 220 is smaller than the thickness dimension of the supporting strip 210, so that a gap is formed between the connecting strip 220 and the top wall of the tunnel, and water stains generated on the top wall of the tunnel are located in the gap between the connecting strip 220 and the tunnel, and then flow into the water collecting tank 240 along the connecting strip 220, and finally fall down in a concentrated manner through the drain hole 250; thereby can be convenient for concentrate the water stain that the collection tunnel roof produced, avoid water stain to drip at will in the tunnel.
In one embodiment, as shown in fig. 1 and 4, the support frame assembly 100 includes a base plate 110, support columns 120, a top plate 130, a support cylinder 150 and a support beam 160, the base plate 110 is used for being fixed with the tunnel floor, the support columns 120 are two and are arranged at two ends of the base plate 110, the top plate 130 is arranged at the top end of the support columns 120, the support beam 160 is arranged between the two support columns 120, the ends of the support beam 160 are in sliding fit with the support columns 120, the support cylinder 150 is arranged on the base plate 110, the telescopic ends of the support cylinder 150 are connected with the support beam 160, and the ends of the side connecting pieces 400, which are far away from the middle support parts 300, are detachably connected with the support beam 160; in the embodiment of the present invention, the support cylinder 150 drives the support beam 160 to move up or down along the support column 120 in a telescopic manner, and the support beam 160 is detachably connected with the side connector 400, so that the middle support member 300 and the support plate member 200 can move up or down along with the support beam 160, thereby facilitating the installation and the disassembly of the whole support structure.
In one embodiment, as shown in fig. 4, the side wall of the supporting column 120 is provided with a guiding chute 140, and a sliding block 170 capable of sliding inside the guiding chute 140 is provided inside the guiding chute, the end of the supporting beam 160 is fixedly connected with the sliding block 170, the end of the side connecting piece 400 far away from the middle supporting component 300 is clamped on the supporting beam 160, the outer side wall of the supporting column 120 is provided with a reinforcing supporting component, and the top of the reinforcing supporting component extends to the upper side of the top plate 130; the support plate strips 210 can drive the lower end parts of the reinforcing and supporting parts to extend to the lower sides of the sliding blocks 170 when the support plate strips 210 positioned at the outermost sides are pressed on the corresponding top plate pieces 130; in the embodiment of the present invention, when the supporting beam 160 is driven by the supporting cylinder 150 to move to a certain height, the supporting plate strips 210 are propped against the inner wall of the tunnel, at this time, the power piece 350 drives the supporting plate 200 to be unfolded until the supporting plate strips 210 located at the outermost side are contacted with the corresponding top plate pieces 130, the supporting plate strips 210 press down the reinforcing supporting member and make the reinforcing supporting member move to the sliding block 170, so as to support the sliding block 170, and further, the bearing force on the supporting beam 160 can be dispersed to the two supporting columns 120, so that the bearing force of the supporting cylinder 150 is reduced and the bearing strength of the supporting beam 160 is improved.
In one embodiment, as shown in fig. 4, the reinforced bearing portion includes a bearing block 180 and a vertical rod member 190, one end of the bearing block 180 passes through the support column 120 and extends into the guide chute 140, the other end of the bearing block 180 has an upward inclined surface, the upper end of the vertical rod member 190 passes through the top plate member 130, the lower end of the vertical rod member 190 is provided with an upper wedge block 191, a magnetic attraction force smaller than the elastic force of a return spring 192 is provided between the lower inclined surface of the upper wedge block 191 and the inclined surface of the bearing block 180, and the upper wedge block 191 is connected with the top plate member 130 through the return spring 192; in the embodiment of the invention, the sliding block 170 moves upwards along with the supporting beam 160, the height of the sliding block 170 is higher than that of the supporting block 180, the supporting plate 200 is unfolded, the supporting plate strip 210 positioned at the outermost side presses down the top of the vertical rod piece 190, the vertical rod piece 190 moves downwards, the upper wedge block 191 moves downwards along with the vertical rod piece 190, and the upper wedge block 191 is in inclined surface contact with the supporting block 180, so that the upper wedge block 191 can push the supporting block 180 to move transversely and the supporting block 180 moves to the lower side of the sliding block 170, the supporting block 180 can support the sliding block 170, the supporting cylinder 150 and the two supporting columns 120 are matched with each other, the supporting beam 160 is supported in a three-point supporting mode, and the bearing strength of the supporting beam 160 is improved.
In one embodiment, as shown in fig. 1, 4 and 5, the middle support bracket 310 is a rectangular frame, the side connector 400 includes an extension rod 410, a mounting sleeve 420 and a clamping member 430, the mounting sleeve 420 and the clamping member 430 are respectively disposed at two ends of the extension rod 410, the mounting sleeve 420 is slid on the middle support bracket 310 and the mounting sleeve 420 is provided with a bolt member 440, the clamping member 430 is in a U-shaped structure and the clamping member 430 can be clamped on the supporting beam 160; in the embodiment of the present invention, since the mounting sleeve 420 can slide on the middle support bracket 310, the position of the mounting sleeve 420 on the middle support bracket 310 can be adjusted, so that the clamping member 430 can be clamped on the supporting beam 160, and the mounting sleeve 420 is fastened with the middle support bracket 310 through the bolt member 440, so that the clamping member 430 is ensured to be firmly clamped on the supporting beam 160.
The above embodiment provides a support structure for a undercut tunnel, wherein, when the support structure is installed, two support frame assemblies 100 are respectively fixed on two side walls of the tunnel, and side connectors 400 on a middle support member 300 are connected with corresponding support frame assemblies 100; the support frame assembly 100 drives the side connector 400 to move upward so that the middle support member 300 moves upward and the middle support member 300 drives the support plate member 200 to move vertically; because the plurality of connecting strips 220 can be retracted into the storage cavity 230, the plurality of support plate strips 210 are in a folded state, the body type is relatively small, and the support plate strips 210 cannot collide with other object blocks in the vertical moving process; when the support plate strip 210 at the middle is in arc propped against the top of the tunnel, the power piece 350 drives the two groups of rotary support arms 340 connected with the power piece to rotate around the fixed transverse rod piece 320, and the two groups of rotary support arms 340 respectively drive the corresponding support plate strips 210 to rotate downwards around the fixed transverse rod piece 320 until the side parts of the support plate strips 210 are in contact with the top of the support frame assembly 100; and then a plurality of backplate strips 210 can mutually support to the top of tunnel is strutted, and the installation is convenient, and whole supporting construction divide into a plurality of parts, the transportation and the transport of being convenient for.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a support structure for undercut tunnel, includes two support frame components and is used for carrying out the support plate piece of supporting to the tunnel roof, its characterized in that, support plate piece includes a plurality of support laths, connects through connecting lath between two adjacent support plate strips, support plate strip has and accomodates the chamber and connect lath and can shrink to accomodate the intracavity portion;
the support frame comprises a support frame assembly, a middle support component and a support frame assembly, wherein the support frame assembly is arranged on the same side of the support frame assembly, and the support frame assembly is arranged on the same side of the support frame assembly;
the middle supporting part comprises a middle supporting bracket, a fixed cross bar piece, a rotary supporting arm and a power piece;
the side connecting piece is arranged at the end part of the middle support bracket, and the fixed cross rod piece is fixed at the middle part of the middle support bracket;
the rotary support arms are multiple groups, every two rotary support arms are one group, one end of each rotary support arm is fixedly connected with the corresponding support plate strip, the other end of each rotary support arm is rotationally connected with the fixed cross rod piece, and the middle support plate strip is fixedly connected with the middle support bracket through the middle support rod;
the rotary supporting arms respectively corresponding to the two support plate strips at the outermost edge are connected with the power piece; the power piece can drive the two groups of rotary supporting arms to synchronously rotate around the fixed transverse rod piece in opposite directions.
2. The support structure for a undercut tunnel according to claim 1, wherein the power member includes a power motor, a wire rod member, and an i-frame;
the power motor is arranged on the middle support bracket through a support, and one end of the screw rod piece is connected with the output end of the power motor through a coupler;
the two groups of adjusting support arms are arranged on the I-shaped frame, connecting sleeves are hinged to the end portions, away from the I-shaped frame, of the adjusting support arms, the connecting sleeves are sleeved on the corresponding rotating support arms in a sliding mode, and the screw rod piece penetrates through the middle of the I-shaped frame in a spiral mode.
3. The support structure for the undercut tunnel according to claim 1, wherein water collecting grooves communicated with the accommodating cavity are formed in two side parts of the support plate strip, and the port size of the water collecting grooves is larger than that of the accommodating cavity;
a plurality of drain holes close to the edge of the port are formed in the lower side wall of the water collecting tank.
4. The support structure for a undercut tunnel according to claim 1, wherein the support frame assembly comprises a base plate, a support column, a roof plate, a support cylinder, and a support beam;
the base plate is used for being fixed with the ground of a tunnel, two support columns are arranged at two end parts of the base plate, the top plate piece is arranged at the top end parts of the support columns, the supporting cross beam is arranged between the two support columns, and the end parts of the supporting cross beam are in sliding fit with the support columns;
the support cylinder is arranged on the base plate, the telescopic end of the support cylinder is connected with the support beam, and the end part of the side connecting piece, which is far away from the middle supporting part, is detachably connected with the support beam.
5. The support structure for the undercut tunnel according to claim 4, wherein a guide chute is provided on a side wall of the support column and a slider capable of sliding inside the guide chute is provided inside the guide chute, and an end of the support beam is fixedly connected with the slider;
the end part of the side connecting piece, which is far away from the middle supporting part, is clamped on the supporting cross beam, the outer side wall of the supporting column is provided with a reinforcing and supporting part, and the top of the reinforcing and supporting part extends to the upper side of the top plate;
when the support plate strips located at the outermost side are pressed against the corresponding top plate element, the support plate strips can drive the lower end parts of the reinforcing support members to extend to the lower side of the sliding blocks.
6. The support structure for a undercut tunnel according to claim 5, wherein the reinforcement bearing portion includes a bearing block and a vertical bar;
one end of the bearing block penetrates through the support column and extends into the guide chute, the other end of the bearing block is provided with an upward inclined surface, the upper end part of the vertical rod piece penetrates through the top plate piece, and the lower end part of the vertical rod piece is provided with an upper wedge block;
the lower inclined surface of the upper wedge block and the inclined surface of the supporting block are provided with magnetic attraction force smaller than the elastic force of the return spring, and the upper wedge block is connected with the top plate piece through the return spring.
7. The support structure for a undercut tunnel according to claim 4, wherein the intermediate support bracket is a rectangular frame, and the side connection members include extension bars, mounting sleeves, and clips;
the mounting sleeve and the clamping piece are respectively arranged at two ends of the extension rod, the mounting sleeve is sleeved on the middle support bracket in a sliding manner, and the mounting sleeve is provided with a bolt piece;
the clamping piece is of a U-shaped structure and can be clamped on the supporting beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311595321.6A CN117307215B (en) | 2023-11-28 | 2023-11-28 | Support structure for undercut tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311595321.6A CN117307215B (en) | 2023-11-28 | 2023-11-28 | Support structure for undercut tunnel |
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| CN117307215A true CN117307215A (en) | 2023-12-29 |
| CN117307215B CN117307215B (en) | 2024-01-30 |
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| CN202311595321.6A Active CN117307215B (en) | 2023-11-28 | 2023-11-28 | Support structure for undercut tunnel |
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| KR101817316B1 (en) * | 2017-05-22 | 2018-01-10 | 대신이엔지 주식회사 | Guideroof: Worker protection apparatus for tunnel construction |
| CN212508366U (en) * | 2020-06-10 | 2021-02-09 | 浙江顺邦工程机械设备有限公司 | Railway tunnel temporary support device convenient to butt joint |
| CN216305970U (en) * | 2021-12-08 | 2022-04-15 | 济南市勘察测绘研究院 | Strutting arrangement is used in geotechnical engineering tunnel construction |
| CN217028978U (en) * | 2021-12-10 | 2022-07-22 | 山西路桥第三工程有限公司 | Tunnel construction protector |
| CN217028959U (en) * | 2022-03-15 | 2022-07-22 | 云南省建设投资控股集团有限公司 | Shallow underground excavation tunnel supporting construction that buries |
| CN217538743U (en) * | 2022-06-21 | 2022-10-04 | 中冶南方城市建设工程技术有限公司 | Pre-support device for underground engineering |
| CN115749880A (en) * | 2022-12-09 | 2023-03-07 | 湖南省通泰工程有限公司 | Tunnel construction strutting arrangement |
| CN115898486A (en) * | 2023-01-05 | 2023-04-04 | 山西诚达公路勘察设计有限公司 | Temporary supporting device for arch-shaped roadway of highway tunnel |
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|---|---|
| CN117307215B (en) | 2024-01-30 |
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