CN116537800A - Main tunnel supporting mechanism of shield connection channel and construction method thereof - Google Patents
Main tunnel supporting mechanism of shield connection channel and construction method thereof Download PDFInfo
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- CN116537800A CN116537800A CN202310459163.5A CN202310459163A CN116537800A CN 116537800 A CN116537800 A CN 116537800A CN 202310459163 A CN202310459163 A CN 202310459163A CN 116537800 A CN116537800 A CN 116537800A
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- reaction frame
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- main tunnel
- shield machine
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- 238000010276 construction Methods 0.000 title claims abstract description 31
- 230000007246 mechanism Effects 0.000 title claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 89
- 239000002689 soil Substances 0.000 claims abstract description 16
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 13
- 210000001503 joint Anatomy 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 11
- 230000005641 tunneling Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 239000011435 rock Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007142 ring opening reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 241000276425 Xiphophorus maculatus Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008234 soft water Substances 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
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- 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
-
- 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
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/006—Anchoring-bolts made of cables or wires
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of tunnel construction, in particular to a main tunnel supporting mechanism of a shield connection channel and a construction method thereof, wherein the main tunnel supporting mechanism comprises a shield machine reaction frame, the shield machine reaction frame is arranged in a main tunnel segment, the main tunnel segment is arranged in a main tunnel of the shield connection channel, a reinforcing connecting piece is arranged between the shield machine reaction frame and the main tunnel segment and is used for installing the shield machine reaction frame in an inner ring opening of the main tunnel segment, and an outer ring surface of the shield machine reaction frame is provided with a pre-buried installing piece and is used for being fixed at one end of a high-strength inhaul cable; the beneficial effects are as follows: according to the main tunnel supporting mechanism of the shield connection channel and the construction method thereof, the force of the shield machine pushing on the main tunnel segment is transmitted to the soil layer or the rock stratum by utilizing the inhaul cable, the tensile force born by the segment is reduced, and the connection channel is constructed safely and efficiently; the transmission way of the force on the inhaul cable is simple and clear, the construction is convenient, the occupied space is small, and sufficient space is reserved for the construction of the shield machine.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a main tunnel supporting mechanism of a shield connection channel and a construction method thereof.
Background
In soft water-bearing stratum and ground structures which are not allowed to be disassembled, and in difficult construction condition areas, the shield method is adopted to construct the construction equipment, so that the construction equipment has the advantages of high mechanization degree, small vibration, low noise, high construction speed, reliability, small influence on resident along the line, underground and ground structures and buildings and the like, and the influence on the surrounding environment can be reduced to the minimum when the shield method is adopted to construct a communication channel. However, as the connecting channel portal is cut, the main tunnel structure is damaged, and the main tunnel needs to provide counter force in the cutting and pushing processes, if the pushing counter force of the shield machine is large or the support of the main tunnel segment is insufficient, once accidents occur, the constructed tunnel is damaged, thereby influencing the construction period and causing larger economic loss.
In the prior art, a shield method is adopted to construct a communication channel at present, the main tunnel pipe piece is supported and reinforced by grouting after the main tunnel wall is mainly used, the uniformity and the integrity of soil stress are enhanced, and the deformation resistance of a main tunnel structure is improved by adopting a support system in the tunnel. However, the system is complex to install, occupies a large space, reduces the limited construction space again, and affects the construction efficiency.
Disclosure of Invention
The invention aims to provide a main tunnel supporting mechanism of a shield connection channel and a construction method thereof, which are used for solving 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 shield constructs contact passageway main tunnel supporting mechanism, includes shield constructs quick-witted reaction frame, and shield constructs quick-witted reaction frame and install in main tunnel section of jurisdiction, and main tunnel section of jurisdiction is installed in shield constructs contact passageway main tunnel, be equipped with between shield constructs quick-witted reaction frame and the main tunnel section of jurisdiction and consolidate the piece for install shield constructs quick-witted reaction frame in the interior ring mouth of main tunnel section of jurisdiction, shield constructs quick-witted reaction frame's outer loop surface and is equipped with pre-buried installed part for fix the one end at high strength cable, insert in the soil layer after the other end of high strength cable runs through main tunnel section of jurisdiction, shield constructs quick-witted reaction frame's outer loop surface and installs buffer gear, reduces the influence of vibrations that produce to main tunnel section of jurisdiction when the high strength cable is installed.
Preferably, the shield machine reaction frame is of an octagonal annular plate structure, an inner annular opening of the shield machine reaction frame is of a round opening, a cushion block is fixed on an outer annular surface of the shield machine reaction frame and of an arc-shaped plate structure, four groups of cushion blocks are arranged, the cushion blocks are arranged in a cross shape, four groups of reinforcing connection pieces are arranged in the cross shape, and the four groups of reinforcing connection pieces are distributed in the round opening of the shield machine reaction frame.
Preferably, the reinforcement connecting piece comprises a preformed hole and a reinforcing bolt, wherein the preformed hole is formed in a round opening of the shield machine reaction frame, the preformed hole is in a T-shaped opening, the preformed hole penetrates through the shield machine reaction frame and the cushion block, and the reinforcing bolt penetrates through the preformed hole and then is screwed on the inner annular surface of the main tunnel segment.
Preferably, the pre-buried installed part is equipped with four groups, every group pre-buried installed part and cushion are alternately distributed at the outer annular of shield constructs quick-witted reaction frame, pre-buried installed part includes mounting groove and pre-buried axle, the mounting groove is the square groove, the mounting groove is seted up on the outer annular of shield constructs quick-witted reaction frame, and the mounting groove is equipped with a plurality ofly, a plurality of mounting grooves distribute side by side, pre-buried axle is fixed on the lateral wall of two parallel distribution of mounting groove, the one end bolt of high strength cable is just fixed on pre-buried epaxially, the one end cover of high strength cable is established and is fixed with the ring flange, the ring flange passes through the mounting bolt to be fixed on the outer annular of shield constructs quick-witted reaction frame.
Preferably, pouring holes are formed in the surface of the main tunnel duct piece, the pouring holes correspond to the high-strength inhaul cables one by one, and the high-strength inhaul cables penetrate through the pouring holes and then are inserted into the soil layer.
Preferably, the buffer gear includes supporting shoe, reservation groove, buffer block, rubber gasket, butt joint groove, guide post, spring and rubber traction column, and the supporting shoe is convex platelike structure, and the supporting shoe is equipped with two sets of, and two sets of supporting shoe are about mounting groove symmetric distribution, and two sets of supporting shoe are all fixed on shield constructs the outer anchor ring of quick-witted reaction frame, and the reservation groove is offered on the surface of supporting shoe, and the notch width of reservation groove is less than the bottom surface width of supporting shoe, and the reservation groove runs through the supporting shoe.
Preferably, the buffer block is square, one end of the buffer block extending to the inner ring surface of the main tunnel segment is in an arc-shaped curved surface, the rubber gasket is fixed on the arc-shaped curved surface, the rubber gasket is propped against the inner ring surface of the main tunnel segment, the buffer block is movably inserted into the reserved groove, the butt joint groove is formed in the other end of the buffer block, one end of the guide column is movably inserted into the butt joint groove, the other end of the guide column is fixed on the outer ring surface of the reaction frame of the shield machine, the spring is sleeved on the rod body of the guide column, and the spring is fixed between the butt joint groove and the outer ring surface of the reaction frame of the shield machine.
Preferably, the rubber traction column is provided with a plurality of rubber traction columns, the plurality of rubber traction columns are arranged around the spring, the plurality of rubber traction columns are fixed between the butt joint groove and the outer ring surface of the shield machine reaction frame, and a limiting component is arranged between the buffer block and the outer ring surface of the shield machine reaction frame.
Preferably, the limiting component comprises a sliding groove, a sliding block, a traction plate and a rubber clamping block, wherein the sliding groove is formed in the surface of the buffer block, the sliding block is slidably connected in the sliding groove, the sliding block is fixed at one end of the traction plate, the traction plate is of an L-shaped plate-shaped structure, the other end of the traction plate is fixed on the surface of the reserved groove, and the rubber clamping block is fixed between the other end of the traction plate and the buffer block.
The construction method of the shield connection channel main tunnel supporting mechanism comprises the following steps:
according to the site survey and the construction deployment condition thereof, the shield machine is hoisted from a set position to a well, assembled and transported to a hole of a connecting channel, and the direction of the outward radiation of the high-strength cable is determined, so that the position of the high-strength cable fixed on a reaction frame of the shield machine is determined;
the shield machine reaction frame is fixed at the pipe piece in front of the connecting passage opening, a reverse impact spring is arranged on the outer side of the reaction frame to prevent the tunnel pipe piece from being damaged when the high-strength inhaul cable is driven, the shield machine reaction frame is used as a reaction device, the high-strength inhaul cable is driven into soil body through a reserved hole in the main tunnel pipe piece at a designed angle, grouting is conducted to the reserved hole in time, waterproof measures are taken, and water leakage is avoided;
embedding a inhaul cable driven into soil into a position determined by a reaction frame of the shield machine, and fixing the inhaul cable by using bolts;
and installing a negative ring, preparing the tunneling construction of the shield machine, closely monitoring the states of the high-strength inhaul cable, the reserved hole of the pipe piece and the pipe piece after the reaction frame of the shield machine in the tunneling process of the shield machine, and immediately stopping and timely checking and processing if the inhaul cable is abnormal in elongation, the inhaul cable is broken or the reserved hole is water-permeable.
Compared with the prior art, the invention has the beneficial effects that:
according to the main tunnel supporting mechanism of the shield connection channel and the construction method thereof, the force of the shield machine pushing on the main tunnel segment is transmitted to the soil layer or the rock stratum by utilizing the inhaul cable, the tensile force born by the segment is reduced, and the connection channel is constructed safely and efficiently; the transmission way of the force on the inhaul cable is simple and clear, the construction is convenient, the occupied space is small, and sufficient space is reserved for the construction of the shield machine.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the present invention in semi-section;
FIG. 3 is a schematic diagram of a reaction frame structure of the shield tunneling machine;
FIG. 4 is a schematic view of a shield tunneling machine reaction frame structure of the present invention partially cut away;
FIG. 5 is an enlarged schematic view of the structure A in FIG. 4;
FIG. 6 is a schematic diagram of a buffer block according to the present invention;
FIG. 7 is a schematic view of the structure of the support block according to the present invention;
FIG. 8 is a schematic view of the installation structure of the embedded shaft of the present invention.
In the figure: the shield machine reaction frame 1, a main tunnel segment 2, a cushion block 3, a preformed hole 4, a reinforcing bolt 5, a mounting groove 6, a pre-buried shaft 7, a high-strength inhaul cable 8, a flange 9, a mounting bolt 10, a pouring hole 11, a supporting block 12, a preformed groove 13, a buffer block 14, a rubber gasket 15, a butt joint groove 16, a guide post 17, a spring 18, a rubber traction post 19, a chute 20, a sliding block 21, a traction plate 22 and a rubber clamping block 23.
Detailed Description
In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present invention, are intended to be illustrative only and not limiting of the embodiments of the present invention, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
Example 1
Referring to fig. 1 to 3, the present invention provides a technical solution: the utility model provides a shield connection passageway main tunnel supporting mechanism, including shield machine reaction frame 1, shield machine reaction frame 1 installs in main tunnel section of jurisdiction 2, main tunnel section of jurisdiction 2 installs in shield connection passageway main tunnel, be equipped with the reinforcement link between shield machine reaction frame 1 and the main tunnel section of jurisdiction 2, be used for installing shield machine reaction frame 1 in the inner ring mouth of main tunnel section of jurisdiction 2, shield machine reaction frame 1 is octagon ring plate structure, shield machine reaction frame 1's inner ring mouth is the round mouth, shield machine reaction frame 1's outer ring face is fixed with cushion 3, cushion 3 is circular arc platy structure, cushion 3 is provided with four groups, set up cushion 3 and be "ten" font arrangement, the reinforcement link is equipped with four groups, four groups of reinforcement link are in "ten" font and distribute in the round mouth of shield machine reaction frame 1, the reinforcement link includes preformed hole 4 and reinforcing bolt 5, preformed hole 4 is in the round mouth of "T" font mouth, preformed hole 4 runs through shield machine frame 1 and cushion 3, reinforcing 5 runs through behind the ring mouth of preformed hole 4 and is equipped with the cable for the high-impact cable of main tunnel section of jurisdiction 2 and is installed in the outer ring face of main tunnel section of jurisdiction 2, the cable is installed to the high-impact cable of the opposite to the main tunnel section of jurisdiction 2, high-impact strength cable is installed to the main tunnel section of jurisdiction 2, high-impact cable impact resistance is installed to the main tunnel section of jurisdiction 2; the force of the shield machine pushing on the main tunnel pipe piece is transmitted to the soil layer or the rock stratum by utilizing the inhaul cable, so that the tensile force born by the pipe piece is reduced, and the communication channel is constructed safely and efficiently; the transmission way of the force on the inhaul cable is simple and clear, the construction is convenient, the occupied space is small, and sufficient space is reserved for the construction of the shield machine.
Example two
Referring to fig. 8, on the basis of the first embodiment, in order to fix one end of a high-strength cable 8 on a shield machine reaction frame 1, four groups of pre-buried mounting pieces are provided, each group of pre-buried mounting pieces and a cushion block 3 are alternately distributed on the outer ring surface of the shield machine reaction frame 1, each pre-buried mounting piece comprises a mounting groove 6 and a pre-buried shaft 7, each mounting groove 6 is a square groove, each mounting groove 6 is formed on the outer ring surface of the shield machine reaction frame 1, a plurality of mounting grooves 6 are arranged, the pre-buried shafts 7 are fixed on two side walls of the mounting grooves 6 which are distributed in parallel, one end of the high-strength cable 8 is bolted and fixed on the pre-buried shaft 7, one end of the high-strength cable 8 is sleeved and fixed with a flange 9, and the flange 9 is fixed on the outer ring surface of the shield machine reaction frame 1 through a mounting bolt 10; casting holes 11 are formed in the surface of the main tunnel duct piece 2, the casting holes 11 are in one-to-one correspondence with the high-strength inhaul cables 8, and the high-strength inhaul cables 8 penetrate through the casting holes 11 and then are inserted into a soil layer;
after one end, fixed with the flange plate 9, of the high-strength inhaul cable 8 is sleeved on the surface of the embedded shaft 7, the flange plate 9 is fixed on the surface of the shield machine reaction frame 1 by means of the mounting bolts 10, then the high-strength inhaul cable 8 penetrates through the pouring holes 11 and is inserted into a soil layer, and concrete is poured into the pouring holes 11 to seal and strengthen.
Example III
Referring to fig. 5 to 7, in order to buffer vibration when the high-strength inhaul cable 8 is fixed at the joint of the reaction frame 1 of the shield machine and the main tunnel segment 2 on the basis of the second embodiment, the buffer mechanism comprises two supporting blocks 12, a reserved groove 13, a buffer block 14, a rubber gasket 15, a butt joint groove 16, a guide post 17, a spring 18 and a rubber traction post 19, wherein the supporting blocks 12 are in a circular arc plate-shaped structure, the two groups of supporting blocks 12 are symmetrically distributed about the mounting groove 6, the two groups of supporting blocks 12 are fixed on the outer ring surface of the reaction frame 1 of the shield machine, the reserved groove 13 is arranged on the surface of the supporting blocks 12, the width of the notch of the reserved groove 13 is smaller than the width of the bottom surface of the supporting blocks 12, the reserved groove 13 penetrates through the supporting blocks 12, the buffer block 14 is in a square block, one end of the buffer block 14 extending to the inner ring surface of the main tunnel segment 2 is in a circular arc curved surface, the rubber gasket 15 is fixed on the circular arc curved surface, the rubber gasket 15 is propped against the inner annular surface of the main tunnel segment 2, the buffer block 14 is movably inserted into the reserved groove 13, the butt joint groove 16 is arranged at the other end of the buffer block 14, one end of the guide post 17 is movably inserted into the butt joint groove 16, the other end of the guide post 17 is fixed on the outer annular surface of the shield machine reaction frame 1, the spring 18 is sleeved on the rod body of the guide post 17, the spring 18 is fixed between the butt joint groove 16 and the outer annular surface of the shield machine reaction frame 1, the rubber traction posts 19 are provided with a plurality of rubber traction posts 19 which are arranged around the spring 18, the plurality of rubber traction posts 19 are all fixed between the butt joint groove 16 and the outer annular surface of the shield machine reaction frame 1, a limit component is arranged between the buffer block 14 and the outer annular surface of the shield machine reaction frame 1, the limit component comprises a slide groove 20, a slide block 21, a traction plate 22 and a rubber clamping block 23, the slide groove 20 is arranged on the surface of the buffer block 14, the sliding block 21 is slidably connected in the sliding groove 20, the sliding block 21 is fixed at one end of the traction plate 22, the traction plate 22 is of an L-shaped plate-shaped structure, the other end of the traction plate 22 is fixed on the surface of the reserved groove 13, and the rubber clamping block 23 is fixed between the other end of the traction plate 22 and the buffer block 14;
the rubber clamping blocks 23, the rubber traction columns 19 and the springs 18 jointly support the buffer blocks 14, so that the rubber gaskets 15 are propped against the inner annular surface of the main tunnel segment 2, vibration generated when the high-strength inhaul cable 8 is fixed causes the buffer blocks 14 to slide along the reserved grooves 13, and at the moment, the rubber clamping blocks 23, the rubber traction columns 19 and the springs 18 are extruded and deformed, so that vibration damping is achieved.
The construction method of the shield connection channel main tunnel supporting mechanism comprises the following steps:
according to the site survey and the construction deployment condition thereof, the shield machine is hoisted from a set position to a well, assembled and transported to a hole of a connecting channel, and the direction of the outward radiation of the high-strength cable is determined, so that the position of the high-strength cable fixed on a reaction frame of the shield machine is determined;
the shield machine reaction frame is fixed at the pipe piece in front of the connecting passage opening, a reverse impact spring is arranged on the outer side of the reaction frame to prevent the tunnel pipe piece from being damaged when the high-strength inhaul cable is driven, the shield machine reaction frame is used as a reaction device, the high-strength inhaul cable is driven into soil body through a reserved hole in the main tunnel pipe piece at a designed angle, grouting is conducted to the reserved hole in time, waterproof measures are taken, and water leakage is avoided;
embedding a inhaul cable driven into soil into a position determined by a reaction frame of the shield machine, and fixing the inhaul cable by using bolts;
and installing a negative ring, preparing the tunneling construction of the shield machine, closely monitoring the states of the high-strength inhaul cable, the reserved hole of the pipe piece and the pipe piece after the reaction frame of the shield machine in the tunneling process of the shield machine, and immediately stopping and timely checking and processing if the inhaul cable is abnormal in elongation, the inhaul cable is broken or the reserved hole is water-permeable.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a shield constructs contact passageway main tunnel supporting mechanism, includes shield constructs quick-witted reaction frame (1), and shield constructs quick-witted reaction frame (1) and installs in main tunnel section of jurisdiction (2), and main tunnel section of jurisdiction (2) are installed in shield constructs contact passageway main tunnel, its characterized in that: the shield constructs between quick-witted reaction frame (1) and main tunnel segment (2) and is equipped with the reinforcement and links, be arranged in the inner ring mouth of main tunnel segment (2) with shield constructs quick-witted reaction frame (1), the outer ring face of shield constructs quick-witted reaction frame (1) is equipped with pre-buried installed part, be used for fixing the one end at high strength cable (8), insert in the soil layer after the other end of high strength cable (8) runs through main tunnel segment (2), buffer gear is installed to the outer ring face of shield constructs quick-witted reaction frame (1), the vibrations that produce when reducing high strength cable (8) installation are to main tunnel segment (2).
2. The shield communication tunnel main tunnel supporting mechanism according to claim 1, wherein: the shield machine reaction frame (1) is of an octagonal annular plate structure, an inner annular opening of the shield machine reaction frame (1) is of a circular opening, a cushion block (3) is fixed on an outer annular surface of the shield machine reaction frame (1), the cushion block (3) is of a circular arc-shaped plate structure, four groups of cushion blocks (3) are arranged, the cushion blocks (3) are arranged in a cross shape, four groups of reinforcing connection pieces are arranged in the circular opening of the shield machine reaction frame (1), and the four groups of reinforcing connection pieces are distributed in the cross shape.
3. The shield communication tunnel main tunnel supporting mechanism according to claim 1, wherein: the reinforcing connecting piece comprises a preformed hole (4) and a reinforcing bolt (5), wherein the preformed hole (4) is formed in a round opening of the shield tunneling machine reaction frame (1), the preformed hole (4) is in a T-shaped opening, the preformed hole (4) penetrates through the shield tunneling machine reaction frame (1) and the cushion block (3), and the reinforcing bolt (5) penetrates through the preformed hole (4) and then is connected to an inner annular surface of the main tunnel segment (2) in a threaded mode.
4. The shield communication tunnel main tunnel supporting mechanism according to claim 1, wherein: the utility model provides a shield constructs quick-witted reaction frame, pre-buried installed part is equipped with four groups, every group pre-buried installed part and cushion (3) are alternately distributed on the outer ring face of shield constructs quick-witted reaction frame (1), pre-buried installed part includes mounting groove (6) and pre-buried axle (7), mounting groove (6) are the square groove, mounting groove (6) are seted up on the outer ring face of shield constructs quick-witted reaction frame (1), and mounting groove (6) are equipped with a plurality of, a plurality of mounting grooves (6) distribute side by side, pre-buried axle (7) are fixed on the lateral wall of two parallel distribution of mounting groove (6), the one end bolt of high strength cable (8) is fixed on pre-buried axle (7), the one end cover of high strength cable (8) is established and is fixed with ring flange (9), ring flange (9) are fixed on the outer ring face of shield constructs quick-witted reaction frame (1) through mounting bolt (10).
5. The shield communication tunnel main tunnel supporting mechanism according to claim 1, wherein: casting holes (11) are formed in the surface of the main tunnel duct piece (2), the casting holes (11) correspond to the high-strength inhaul cables (8) one by one, and the high-strength inhaul cables (8) penetrate through the casting holes (11) and then are inserted into a soil layer.
6. The shield communication tunnel main tunnel supporting mechanism according to claim 4, wherein: the buffer mechanism comprises supporting blocks (12), reserved grooves (13), buffer blocks (14), rubber gaskets (15), butt joint grooves (16), guide columns (17), springs (18) and rubber traction columns (19), wherein the supporting blocks (12) are of arc-shaped plate-shaped structures, the two groups of the supporting blocks (12) are symmetrically distributed with respect to the mounting grooves (6), the two groups of the supporting blocks (12) are fixed on the outer ring surface of the reaction frame (1) of the shield machine, the reserved grooves (13) are formed in the surfaces of the supporting blocks (12), the width of the notch of each reserved groove (13) is smaller than the width of the bottom surface of each supporting block (12), and the reserved grooves (13) penetrate through the supporting blocks (12).
7. The shield communication tunnel main tunnel supporting mechanism according to claim 6, wherein: the buffer block (14) is square, one end of the buffer block (14) extending to the inner ring surface of the main tunnel segment (2) is in an arc-shaped curved surface, the rubber gasket (15) is fixed on the arc-shaped curved surface, the rubber gasket (15) abuts against the inner ring surface of the main tunnel segment (2), the buffer block (14) is movably inserted into the reserved groove (13), the butt joint groove (16) is formed in the other end of the buffer block (14), one end of the guide column (17) is movably inserted into the butt joint groove (16), the other end of the guide column (17) is fixed on the outer ring surface of the shield machine reaction frame (1), the spring (18) is sleeved on the rod body of the guide column (17), and the spring (18) is fixed between the butt joint groove (16) and the outer ring surface of the shield machine reaction frame (1).
8. The shield communication tunnel main tunnel supporting mechanism according to claim 6, wherein: the rubber traction columns (19) are provided with a plurality of, the plurality of rubber traction columns (19) are arranged around the springs (18), the plurality of rubber traction columns (19) are fixed between the butt joint grooves (16) and the outer annular surface of the shield machine reaction frame (1), and a limiting assembly is arranged between the buffer block (14) and the outer annular surface of the shield machine reaction frame (1).
9. The shield communication tunnel main tunnel supporting mechanism according to claim 8, wherein: limiting component includes spout (20), slider (21), traction plate (22) and rubber clamp splice (23), and the surface at buffer block (14) is seted up in spout (20), slider (21) sliding connection in spout (20), and slider (21) are fixed in the one end of traction plate (22), and traction plate (22) are "L" platelike structure, and the other end of traction plate (22) is fixed on the surface of reservation groove (13), and rubber clamp splice (23) are fixed between the other end of traction plate (22) and buffer block (14).
10. The construction method of the main tunnel supporting mechanism of the shield connection channel is characterized by comprising the following steps of:
according to the site survey and the construction deployment condition thereof, the shield machine is hoisted from a set position to a well, assembled and transported to a hole of a connecting channel, and the direction of the outward radiation of the high-strength cable is determined, so that the position of the high-strength cable fixed on a reaction frame of the shield machine is determined;
the shield machine reaction frame is fixed at the pipe piece in front of the connecting passage opening, a reverse impact spring is arranged on the outer side of the reaction frame to prevent the tunnel pipe piece from being damaged when the high-strength inhaul cable is driven, the shield machine reaction frame is used as a reaction device, the high-strength inhaul cable is driven into soil body through a reserved hole in the main tunnel pipe piece at a designed angle, grouting is conducted to the reserved hole in time, waterproof measures are taken, and water leakage is avoided;
embedding a inhaul cable driven into soil into a position determined by a reaction frame of the shield machine, and fixing the inhaul cable by using bolts;
and installing a negative ring, preparing the tunneling construction of the shield machine, closely monitoring the states of the high-strength inhaul cable, the reserved hole of the pipe piece and the pipe piece after the reaction frame of the shield machine in the tunneling process of the shield machine, and immediately stopping and timely checking and processing if the inhaul cable is abnormal in elongation, the inhaul cable is broken or the reserved hole is water-permeable.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117128008A (en) * | 2023-10-26 | 2023-11-28 | 江苏快鹿地铁钢结构制造有限公司 | Quick assembly type steel pipe sheet for tunnel connecting channel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117128008A (en) * | 2023-10-26 | 2023-11-28 | 江苏快鹿地铁钢结构制造有限公司 | Quick assembly type steel pipe sheet for tunnel connecting channel |
| CN117128008B (en) * | 2023-10-26 | 2024-02-23 | 江苏快鹿地铁钢结构制造有限公司 | Quick assembly type steel pipe sheet for tunnel connecting channel |
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