CN110645025A - Double-layer arch frame support construction system for highway soft rock tunnel and construction method thereof - Google Patents
Double-layer arch frame support construction system for highway soft rock tunnel and construction method thereof Download PDFInfo
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- CN110645025A CN110645025A CN201910991989.XA CN201910991989A CN110645025A CN 110645025 A CN110645025 A CN 110645025A CN 201910991989 A CN201910991989 A CN 201910991989A CN 110645025 A CN110645025 A CN 110645025A
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 239000011435 rock Substances 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 81
- 239000010959 steel Substances 0.000 claims abstract description 81
- 230000007246 mechanism Effects 0.000 claims abstract description 65
- 238000009434 installation Methods 0.000 claims description 72
- 239000002689 soil Substances 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001174 ascending 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
- 230000000149 penetrating effect Effects 0.000 description 1
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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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
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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
- E21D11/14—Lining predominantly with metal
- E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches
- E21D11/24—Knuckle joints or links between arch members
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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Abstract
The invention relates to the technical field of tunnel support, and discloses a double-layer arch support construction system for a highway soft rock tunnel and a construction method thereof. The outer steel arch comprises a plurality of sections of outer arches, the inner steel arch comprises a plurality of sections of inner arches which are arranged with the corresponding outer arches in the same radian, and a connecting mechanism is arranged between each outer arch and each corresponding inner arch; the connecting mechanism comprises a fixing mechanism which is respectively used for connecting the same end of the outer arch and the corresponding inner arch, the fixing mechanism comprises a fixing plate, bolt holes are formed in the periphery of the fixing plate, connecting bolts are arranged in the bolt holes, two connecting plates which are arranged in the vertical direction are arranged on the plate surface of the fixing plate in parallel, and the end parts of the outer arch and the corresponding inner arch are fixedly connected between the connecting plates; a connecting rod is connected between the fixing mechanisms. Through the structure, the double-layer arch support construction system can be quickly installed and spliced in the tunnel.
Description
Technical Field
The invention relates to the technical field of tunnel support, in particular to a double-layer arch support construction system of a highway soft rock tunnel and a construction method thereof.
Background
In recent years, with the requirements of national social and economic strength enhancement and regional economic development, mountain winding roads in mountain areas are gradually abandoned, a large number of tunnel projects are adopted to pass through mountains, and as surrounding rocks of soft rock tunnels mainly show crack and joint development, disordered output, obvious folds, broken and weak rock masses, low strength and extremely poor stability, some soft rocks are accompanied by high ground stress and have rheological characteristics, the redistribution of the stress of the tunnels after excavation is longer in completion time, and the stress distribution is uneven, the tunnels are required to be quickly subjected to supporting and reinforcing construction after excavation.
At present, the steel arch is one of the most common primary support forms in tunnel engineering, and has the advantages of large elastic modulus, high ductility and the like. Most of the steel arch frames can be used as a part of permanent support of the tunnel, and the main function is to resist the initial convergence deformation of surrounding rocks caused by excavation disturbance. Normally, the steel arch is transported to a construction site, is manually installed on an excavated tunnel face by workers, and is fixed at the arch foot of the steel arch by a foot-locking anchor pipe, and the steel arch and the foot-locking anchor pipe are welded by U-shaped steel bars. Because the space in the tunnel is less, large-scale hoisting machinery equipment can not enter, and the weight of the steel arch frame is larger, the difficulty of installing the steel arch frame in the tunnel by workers is larger.
Disclosure of Invention
The invention provides a double-layer arch support construction system for a soft rock tunnel of a road and a construction method thereof, which can overcome certain defects in the prior art.
In order to solve the above technical problems, the present invention is solved by the following technical solutions.
A double-layer arch support construction system for a highway soft rock tunnel comprises an outer-layer steel arch and an inner-layer steel arch, wherein the outer-layer steel arch comprises a plurality of sections of outer arches, the inner-layer steel arch comprises a plurality of sections of inner arches which are arranged in the same radian with the corresponding outer arches, and a connecting mechanism is arranged between the outer arches and two ends of the corresponding inner arches; the connecting mechanism comprises a fixing mechanism which is respectively used for connecting the same end of the outer arch and the corresponding inner arch, the fixing mechanism comprises a fixing plate, bolt holes are formed in the periphery of the fixing plate, connecting bolts are arranged in the bolt holes, two connecting plates which are arranged in the vertical direction are arranged on the plate surface of the fixing plate in parallel, and the end parts of the outer arch and the corresponding inner arch are fixedly connected between the connecting plates; a connecting rod is connected between the fixing mechanisms.
According to the invention, the outer layer steel arch and the inner layer steel arch are arranged in a multi-section manner, so that the double-layer steel arch support is divided into a plurality of sections with smaller mass, workers can conveniently lift the double-layer steel arch to install the double-layer steel arch in a smaller operation space in a tunnel, and the installation difficulty of the double-layer steel arch support is effectively reduced; the connecting mechanism is arranged, so that the end parts of the outer arch and the corresponding inner arch are connected between the connecting plates in a bolt or welding mode, the outer arch and the inner arch are connected together through the connecting rods to be assembled into a section of mounting piece of the double-layer steel arch support, the fixing plates can be connected through the connecting bolts, adjacent mounting pieces can be mounted together, and the double-layer steel arch support can be quickly spliced and mounted in a tunnel; wherein, the setting of connecting rod for outer steel bow member and inlayer steel bow member can act as the back shaft between outer steel bow member and the inlayer steel bow member after the installation is accomplished, need not additionally to set up the back shaft, makes double-deck steel bow member strut and can obtain quick installation. According to the technical scheme, the double-layer arch support construction system can be quickly installed and spliced in the tunnel, and the installation difficulty of workers for installing the double-layer steel arch support in the tunnel is preferably reduced.
Preferably, two ends of the connecting rod are respectively hinged between the corresponding connecting plates, two hinged plates arranged along the front-back direction are arranged on the plate surfaces of the connecting plates in parallel, and opposite hinged holes are formed in the plate surfaces of the hinged plates; the two ends of the connecting rod are respectively provided with a hinge post matched with the corresponding hinge hole.
According to the invention, the hinged plates, the hinged holes and the hinged columns are arranged, so that the hinged columns on the connecting rods penetrate through the hinged holes to enable the connecting rods to be hinged and installed between the corresponding connecting plates, and the installation direction of the hinged plates on the connecting plates is consistent with the direction of the end parts of the double-layer steel arch supports fixed by the connecting plates in a clamping manner, so that the assembled installation parts are in a four-link structure in the same plane, the outer arch and the corresponding inner arch can be close to each other to be accommodated, the space occupied by the outer arch and the corresponding inner arch in the left-right direction is reduced, and the transportation is better facilitated.
Preferably, the connecting rod comprises an inner sleeve, one end of the inner sleeve is connected with a connecting plate positioned on one side of the inner arch frame, a movable cavity with openings at two ends is arranged in the inner sleeve, and limiting sliding grooves are oppositely arranged on the side wall of the movable cavity along the length direction of the inner sleeve; an outer sleeve with one end extending out of the movable cavity and connected with a connecting plate positioned on one side of the outer arch is arranged in the movable cavity, and a limiting sliding column extending out of the corresponding limiting sliding groove is arranged at one end part of the outer sleeve positioned in the movable cavity; the outer side wall of the inner sleeve is provided with threads, the outer sleeve of the inner sleeve is provided with a sleeve ring, the sleeve ring is matched with the threads, and the inner ring of the sleeve ring is provided with a sliding groove for the limiting sliding column to extend into along the circumferential direction of the sleeve ring.
According to the invention, through the arrangement of the inner sleeve, the movable cavity, the limiting sliding chutes, the outer sleeve and the limiting sliding columns, the outer sleeve is positioned in the movable cavity, the limiting sliding columns extend out of the corresponding limiting sliding chutes, meanwhile, the limiting sliding columns extend into the sliding grooves in the sleeve rings, and the sleeve rings are matched with the threads, so that the sleeve rings can drive the outer sleeve to stretch out and draw back in the movable cavity through rotation of the sleeve rings, and further the length of the connecting rods is adjusted, on one hand, the outer arch frames and the corresponding inner arch frames are in an assembling and transporting stage, the length of the connecting rods is adjusted to be shortened, and the occupied space when the outer arch frames and the corresponding inner arch frames are close to be; on the other hand, the outer arch and the corresponding inner arch are installed and spliced in the tunnel, so that the distance between the outer arch and the corresponding inner arch is convenient to adjust, and the installation of the installation part is convenient to splice.
Preferably, the outer side wall of the outer sleeve is provided with a sliding clamping groove with an annular cross section, the sliding clamping groove is formed in one end portion of the outer sleeve in the circumferential direction of the outer sleeve, the outer side wall of the outer sleeve is sleeved with a rotating ring, a sliding rail located in the sliding clamping groove and capable of rotating is arranged on the inner side wall of the rotating ring, and the hinge column is arranged on the outer side wall of the rotating ring.
According to the invention, through the arrangement of the sliding clamping groove, the rotating ring and the sliding rail, the sliding rail is positioned in the sliding clamping groove to slide, so that the rotating ring can be arranged on the side wall of the outer sleeve and can rotate, the hinged plate and the outer sleeve can rotate relatively, and further the fixing mechanism can rotate on the connecting rod, so that the direction of the fixing mechanism clamped on the end part of the outer arch is more flexible, and the assembly of the mounting part is better facilitated.
Preferably, a threaded cavity with two open ends is arranged in the outer sleeve, through holes are formed in the surface of the connecting plate and correspond to the threaded cavity, and one end of the threaded cavity is connected with an anchor rod in a threaded mode, penetrates through the through holes and extends into the tunnel soil body.
According to the double-layer steel arch support, the anchor rod penetrates through the through hole and is in threaded connection with one end in the threaded cavity through the arrangement of the through hole, the threaded cavity and the anchor rod, so that the anchor rod can support the double-layer steel arch support.
Preferably, the tunnel bottom soil body structure further comprises a base station preset in the tunnel bottom soil body, mounting platforms are arranged at two end parts of the base station, mounting cavities with upward openings are arranged in the mounting platforms, clamping grooves are formed in the side walls, close to the opposite sides of the mounting platforms, of the mounting cavities, mounting mechanisms capable of lifting along the mounting cavities are arranged in the mounting cavities, each mounting mechanism comprises a mounting plate, clamping grooves with inverted-T-shaped sections and communicated with the upper side surfaces of the mounting plates are arranged on the side surfaces, close to the clamping grooves, of the mounting plates in the left-right direction, and the; the lateral wall of the side face part on the joint groove communicated mounting plate is provided with a mounting groove, and a limiting mechanism used for blocking the sliding-out of the connecting mechanism is arranged in the mounting groove.
According to the invention, through the arrangement of the base station and the installation platform, the installation part at the bottom of the tunnel can be installed on the installation platform; the fixing plate can be clamped in the clamping groove through the clamping groove, so that when the mounting piece at the bottom of the tunnel is mounted, the fixing plate of the fixing mechanism at the bottom of the mounting piece is aligned with the clamping groove and slides into the clamping groove, the double-layer steel arch frame support can be quickly fixed, and the operation is simple and convenient; because the mounting mechanism is arranged in the mounting cavity in a lifting manner, the spliced and mounted double-layer steel arch support can move upwards, so that the outer-layer steel arch support is attached to the mounting surface of the tunnel, and the phenomenon that the local arch part is hollowed when the concrete is sprayed again in the later period due to the gap between the mounted double-layer steel arch support and the mounting surface of the tunnel is prevented; wherein, stop gear's setting prevents the roll-off of the installed part of installation in the joint inslot better.
As preferred, stop gear is including locating the installation piece in the mounting groove, be equipped with the opening in the installation piece towards the spring mounting groove in joint groove, the last lateral wall of spring mounting groove is equipped with the spacing groove along the extending direction of spring mounting groove, it stretches into the dog in the joint inslot to be equipped with one end through the spring in the spring mounting groove, the dog is equipped with the inclined plane towards one side of mount table opposite flank, coupling mechanism makes the dog retract spring mounting inslot through the extrusion inclined plane, the dog is located and is equipped with the removal post that stretches into the spacing groove on the lateral wall of spring mounting groove.
Through the structure in the invention, the spring pushes the stop block to extend out of the spring mounting groove and extend into the clamping groove to block the side wall of the connecting plate of the fixing mechanism, so that the mounting piece sliding into the clamping groove is prevented from sliding out of the clamping groove; the limiting sliding groove is matched with the moving column to prevent the spring from pushing the stop block to slide out of the spring mounting groove; wherein, the setting on inclined plane for the installed part makes in the automatic spring mounting groove that retracts of dog is made on inclined plane of connecting plate extrusion when slipping in the joint inslot, and the installed part makes the spring promote the dog automatically and stops the installed part in slipping in the joint inslot completely, thereby makes the installation operation of installed part on the mount table simpler.
Preferably, a rotatable rotating rod with one end extending out of the mounting plate is arranged in the mounting groove along the extending direction of the mounting groove; the installation block is provided with a thread through hole for the rotating rod to pass through, and the side surface of the installation cavity is provided with a movable groove for the rotating rod to pass through along the up-down direction.
Through the arrangement of the rotating rod and the threaded through hole, the side wall of the mounting groove can limit the mounting block, so that the mounting block cannot rotate, the rotating rod can further rotate to enable the mounting block to move along the mounting groove, and the stop block drives the mounting piece, located at the bottom end of the tunnel, of the double-layer steel arch support to move, so that the outer arch on the mounting piece can be better attached to the mounting surface of the tunnel, and the phenomenon that the local arch part is hollowed when the concrete is sprayed again in the later period is prevented from existing between the mounted double-layer steel arch support and the mounting surface of the tunnel; wherein, through the setting of activity groove for the dwang reciprocates in the activity inslot when installation mechanism reciprocates in the installation cavity, can not influence the work of dwang.
Preferably, the bottom of the mounting cavity is provided with a support column, a movable cavity with an upward opening is arranged in the support column, the side wall of the movable cavity is oppositely provided with a limit groove along the up-down direction on the outer side wall of the support column, and a movable clamping groove is arranged at the upper end part along the circumferential direction of the support column; a threaded lifting rod with one end extending out of the movable cavity is arranged in the movable cavity, and a limiting column extending into the corresponding limiting groove is arranged at one end part of the threaded lifting rod in the movable cavity; a worm wheel is sleeved outside the threaded lifting rod, and a threaded connecting hole for the threaded lifting rod to be in threaded fit is formed in the middle of the worm wheel; a rotating groove which is coaxial with the threaded connecting hole and is sleeved at the upper end of the supporting column is arranged on the lower side surface of the worm wheel, a clamping rail matched with the movable clamping groove is arranged on the side wall of the rotating groove, and the top end of the threaded lifting rod is connected with the mounting plate; a worm with one end extending out of the mounting platform and capable of rotating is arranged in the mounting cavity, and the worm is matched with the worm wheel.
Through the structure in the invention, when the clamping rail is clamped into the movable clamping groove, the worm wheel is connected to the top end part of the support column in an installing mode and can rotate, the worm wheel is in threaded connection with the threaded lifting rod, the limit column at the end part of the threaded lifting rod extends into the corresponding limit groove, so that the threaded lifting rod is limited and cannot rotate, the worm can be rotated to drive the worm wheel to rotate, the threaded lifting rod can lift in the movable cavity, the height adjustment is realized, the outer-layer steel arch centering supporting the double-layer steel arch centering can be conveniently jacked to be attached to a tunnel mounting surface, and meanwhile, the operation is simple and convenient.
The invention also provides a construction method of the double-layer arch support construction system of the highway soft rock tunnel based on any one of the above, which comprises the following steps:
connecting the same ends of the outer arch centering and the corresponding inner arch centering through a connecting mechanism, and fixing the side walls of the outer arch centering and the corresponding inner arch centering on the corresponding connecting plates in a bolt or welding mode to assemble an installation part;
step two, pouring and setting a base station in the tunnel and installing an installation platform;
step three, transporting the mounting piece in the step one to a supporting position through transporting equipment;
sliding a connecting mechanism at the bottom end parts of the mounting pieces connected together at the bottommost end of the tunnel into a clamping groove in the mounting plate, rotating the rotating rod to enable the outer arch centering to be attached to the mounting surface of the tunnel, connecting the fixing plates together through bolts to enable the adjacent mounting pieces to be connected together, and completing mounting and splicing of the double-layer steel arch support;
step five, the worm is rotated to drive the mounting plate to move upwards, so that the outer layer steel arch of the double-layer steel arch support spliced and mounted in the step four is attached to the mounting surface of the tunnel;
and step six, drilling an anchor rod mounting hole in the tunnel soil body along the extending direction of the threaded cavity, and inserting the anchor rod into the threaded cavity and the anchor rod mounting hole through the through hole threads.
Drawings
Fig. 1 is a schematic structural view of a double arch timbering construction system in embodiment 1;
FIG. 2 is a schematic structural view of a connecting mechanism in embodiment 1;
FIG. 3 is a schematic structural view of a connecting rod in embodiment 1;
FIG. 4 is a schematic sectional view of the connecting rod in embodiment 1;
FIG. 5 is an enlarged schematic view of A in FIG. 4;
FIG. 6 is an enlarged schematic view of B in FIG. 4;
fig. 7 is a schematic view showing the installation of the outer arch and the inner arch on the installation table in embodiment 1;
FIG. 8 is a schematic structural view of a mount table in embodiment 1;
FIG. 9 is a schematic structural view of the mounting mechanism in embodiment 1;
FIG. 10 is a schematic mechanism diagram of a stopper mechanism according to embodiment 1;
fig. 11 is a schematic sectional view of the spacing mechanism in embodiment 1;
fig. 12 is a schematic sectional view of the mount table in embodiment 1.
The names of the parts indicated by the numerical references in the drawings are as follows: 100. an outer layer steel arch frame; 101. an outer arch frame; 110. inner steel arch centering; 111. an inner arch frame; 120. a connecting mechanism; 140. a base station; 141. an installation table; 200. a fixing mechanism; 201. a fixing plate; 202. a connecting bolt; 221. a connecting plate; 222. a through hole; 231. a hinge plate; 232. a hinge hole; 240. a connecting rod; 310. an inner sleeve; 311. a movable cavity; 312. a limiting chute; 313. a thread; 314. a hinged column; 320. a collar; 330. an outer sleeve; 340. rotating the ring; 350. an anchor rod; 411. a threaded cavity; 511. a sliding groove; 512. a limiting sliding column; 611. a sliding clamping groove; 612. a slide rail; 710. an installation mechanism; 720. a worm; 811. a mounting cavity; 812. a card slot; 813. a movable groove; 910. mounting a plate; 911. a clamping groove; 912. mounting grooves; 920. a limiting mechanism; 930. rotating the rod; 1010. mounting blocks; 1011. a limiting groove; 1012. a threaded through hole; 1020. a stopper; 1021. moving the column; 1022. a bevel; 1111. a spring mounting groove; 1112. a spring; 1210. a support pillar; 1211. a movable cavity; 1212. a limiting groove; 1213. a movable clamping groove; 1220. a threaded lifting rod; 1221. a limiting column; 1230. a worm gear; 1231. connecting a threaded hole; 1232. a rotating groove; 1233. and (5) clamping the rail.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention and not limiting.
Example 1
As shown in fig. 1 to 6, the present embodiment provides a double-layer arch support construction system for a highway soft rock tunnel, including an outer-layer steel arch 100 and an inner-layer steel arch 110, where the outer-layer steel arch 100 includes multiple sections of outer arches 101, the inner-layer steel arch 110 includes multiple sections of inner arches 111 arranged in the same radian as the corresponding outer arches 101, and a connection mechanism 120 is arranged between the outer arch 101 and two ends of the corresponding inner arch 111; the connecting mechanism 120 comprises a fixing mechanism 200 respectively used for connecting the same end of the outer arch 101 and the corresponding inner arch 111, the fixing mechanism 200 comprises a fixing plate 201, bolt holes are formed in the periphery of the fixing plate 201, connecting bolts 202 are arranged in the bolt holes, two connecting plates 221 arranged in the vertical direction are arranged on the plate surface of the fixing plate 201 in parallel, and the end parts of the outer arch 101 and the corresponding inner arch 111 are fixedly connected between the connecting plates 221; the connecting rod 240 is connected between the fixing mechanisms 200.
The outer steel arch 100 and the inner steel arch 110 in the embodiment are arranged in a multi-section manner, so that the double-layer steel arch support is divided into a plurality of sections with smaller mass, workers can conveniently lift the double-layer steel arch to install the double-layer steel arch in a smaller operation space in a tunnel, and the installation difficulty of the double-layer steel arch support is effectively reduced; the connecting mechanism 120 is arranged to connect the ends of the outer arch 101 and the corresponding inner arch 111 between the connecting plates 221 in a bolt or welding manner, and connect the outer arch 101 and the inner arch 111 together through the connecting rod 240 to assemble a section of mounting piece of the double-layer steel arch support, wherein the fixing plates 201 can be connected through the connecting bolts 202, so that the adjacent mounting pieces can be mounted together, and the double-layer steel arch support can be quickly spliced and mounted in the tunnel; wherein, the setting of connecting rod 240 for connecting rod 240 can act as the back shaft between outer steel bow 100 and the inlayer steel bow 110 after the installation is accomplished to outer steel bow 100 and inlayer steel bow 110, need not additionally to set up the back shaft, makes double-deck steel bow to strut and can obtain quick installation. According to the technical scheme, the double-layer arch support construction system can be quickly installed and spliced in the tunnel, and the installation difficulty of workers for installing the double-layer steel arch support in the tunnel is reduced better.
In this embodiment, two ends of the connecting rod 240 are hinged between the corresponding connecting plates 221, two hinged plates 231 arranged along the front-back direction are arranged on the plate surface of the connecting plate 221 in parallel, and the opposite plate surfaces of the hinged plates 231 are provided with opposite hinged holes 232; the two ends of the connecting rod 240 are respectively provided with hinge posts 314 which are matched with the corresponding hinge holes 232.
Through the arrangement of the hinge plates 231, the hinge holes 232 and the hinge columns 314 in the embodiment, the hinge columns 314 on the connecting rods 240 penetrate through the hinge holes 232 to enable the connecting rods 240 to be installed between the corresponding connecting plates 221 in a hinged mode, and because the installation direction of the hinge plates 231 on the connecting plates 221 is consistent with the direction of the connecting plates 221 in a clamped mode for fixing the end portions of the double-layer steel arch support, the assembled installation piece is in a four-link structure in the same plane, the outer arch 101 and the corresponding inner arch 111 can be stored close to each other, the space occupied by the outer arch 101 and the corresponding inner arch 111 in the left-right direction is reduced, and the transportation is preferably facilitated.
In this embodiment, the connecting rod 240 includes an inner sleeve 310 having one end connected to the connecting plate 221 located at one side of the inner arch 111, a movable cavity 311 having two open ends is provided in the inner sleeve 310, and the side wall of the movable cavity 311 is relatively provided with a limiting sliding groove 312 along the length direction of the inner sleeve 310; an outer sleeve 330 with one end extending out of the movable cavity 311 and connected with the connecting plate 221 positioned at one side of the outer arch 101 is arranged in the movable cavity 311, and a limiting sliding column 512 extending out of the corresponding limiting sliding groove 312 is arranged at one end part of the outer sleeve 330 positioned in the movable cavity 311; the outer side wall of the inner sleeve 310 is provided with threads 313, the outer sleeve 310 is externally sleeved with a lantern ring 320, the lantern ring 320 is matched with the threads 313, and the inner ring of the lantern ring 320 is provided with a sliding groove 511 for the limiting sliding column 512 to extend into along the circumferential direction of the lantern ring 320.
Through the arrangement of the inner sleeve 310, the movable cavity 311, the limiting sliding grooves 312, the outer sleeve 330 and the limiting sliding columns 512 in the embodiment, the outer sleeve 330 is located in the movable cavity 311, the limiting sliding columns 512 extend out of the corresponding limiting sliding grooves 312, meanwhile, the limiting sliding columns 512 extend into the sliding grooves 511 in the lantern ring 320, and due to the fact that the lantern ring 320 is matched with the threads 313, the lantern ring 320 rotates to drive the outer sleeve 330 to stretch out and draw back in the movable cavity 311, and further the length of the connecting rod 240 is adjusted, on one hand, the length of the connecting rod 240 is adjusted to be shortened in the assembling and transporting stage of the outer arch 101 and the corresponding inner arch 111, and the space occupied by the outer arch 101 and the corresponding inner arch 111 when the outer arch 101 and the corresponding inner arch 111 are close to the accommodating stage is further; on the other hand, the outer arch 101 and the corresponding inner arch 111 are spliced in the tunnel, so that the distance between the outer arch 101 and the corresponding inner arch 111 can be adjusted conveniently, and splicing and installation of the installation parts are facilitated.
In this embodiment, a sliding slot 611 with an annular cross section is disposed on an outer side wall of the outer sleeve 330 and at one end of the outer sleeve 330 along a circumferential direction of the outer sleeve 330, a rotating ring 340 is sleeved on the outer side wall of the outer sleeve 330, a sliding rail 612 rotating in the sliding slot 611 is disposed on an inner side wall of the rotating ring 340, and the hinge post 314 is disposed on an outer side wall of the rotating ring 340.
Through the arrangement of the sliding slot 611, the swivel 340 and the sliding rail 612 in the embodiment, the sliding rail 612 is located in the sliding slot 611 to slide, so that the swivel 340 can be installed on the side wall of the outer sleeve 330 and the swivel 340 can rotate, and the hinge plate 231 and the outer sleeve 330 can rotate relatively, and further the fixing mechanism 200 can rotate on the connecting rod 240, so that the direction of the fixing mechanism 200 clamped on the end of the outer arch 101 is more flexible, and the assembly of the installation part is preferably facilitated.
In this embodiment, a threaded cavity 411 with two open ends is formed in the outer sleeve 330, through holes 222 are formed in the plate surface of the connecting plate 221 corresponding to the threaded cavity 411, and an anchor rod 350 with one end penetrating through the through hole 222 and extending into the tunnel soil body is connected to the threaded cavity 411 in a threaded manner.
Through the arrangement of the through hole 222, the threaded cavity 411 and the anchor rod 350 in the embodiment, the anchor rod 350 penetrates through the through hole 222, one end of the anchor rod is in threaded connection with the threaded cavity 411, and the anchor rod 350 can support a double-layer steel arch support.
As shown in fig. 7 to 12, in this embodiment, the tunnel further includes a base station 140 pre-installed in the soil body at the bottom of the tunnel, two end portions of the base station 140 are provided with installation platforms 141, installation cavities 811 with upward openings are respectively provided in the installation platforms 141, side walls of the installation cavities 811 near opposite sides of the installation platforms 141 are provided with clamping grooves 812, an installation mechanism 710 capable of ascending and descending along the installation cavities 811 is provided in the installation cavities 811, the installation mechanism 710 includes an installation plate 910, clamping grooves 911 with inverted T-shaped cross sections and communicated with upper side surfaces of the installation plate 910 are provided on side surfaces of the installation plate 910 near the clamping grooves 812 along the left-right direction, and the connection mechanism 120; the clamping groove 911 is communicated with the side wall of the upper side surface part of the mounting plate 910, and a mounting groove 912 is arranged on the side wall of the upper side surface part of the mounting plate 910, and a limiting mechanism 920 used for blocking the connecting mechanism 120 from sliding out is arranged in the mounting groove 912.
By the arrangement of the base platform 140 and the installation platform 141 in the embodiment, the installation component at the bottom of the tunnel can be installed on the installation platform 141; through the arrangement of the clamping groove 911, the fixing plate 201 can be clamped in the clamping groove 911, so that when the mounting piece at the bottom of the tunnel is mounted, the fixing plate 201 of the fixing mechanism 200 at the bottom of the mounting piece is aligned with the clamping groove 911 and slides into the clamping groove 911, the double-layer steel arch support can be rapidly fixed, and the operation is simple and convenient; because the installation mechanism 710 can be arranged in the installation cavity 811 in a lifting manner, the spliced and installed double-layer steel arch support can move upwards, so that the outer-layer steel arch support is attached to the installation surface of the tunnel, and the phenomenon that the local arch part is hollowed when the concrete is sprayed again in the later period due to the gap between the installed double-layer steel arch support and the tunnel installation surface is prevented; wherein, the setting of stop gear 920 prevents the roll-off of the installed part of installation in joint groove 911 better.
In this embodiment, stop gear 920 is including locating the installation piece 1010 in mounting groove 912, be equipped with the opening in the installation piece 1010 towards the spring mounting groove 1111 of joint groove 911, the last lateral wall of spring mounting groove 1111 is gone up and is equipped with spacing groove 1011 along the extending direction of spring mounting groove 1111, be equipped with the dog 1020 that one end stretches into in the joint groove 911 through spring 1112 in the spring mounting groove 1111, dog 1020 is equipped with inclined plane 1022 towards one side of the opposite side of mount table 141, coupling mechanism 120 makes in dog 1020 withdrawal spring mounting groove 1111 through extrusion inclined plane 1022, dog 1020 is located and is equipped with the removal post 1021 that stretches into spacing groove 1011 on the lateral wall in spring mounting groove 1111.
Through the structure in the embodiment, the spring 1112 pushes the stopper 1020 to extend out of the spring installation groove 1111 and extend into the clamping groove 911 to block the side wall of the connecting plate 221 of the fixing mechanism 200, so that the mounting piece sliding into the clamping groove 911 is prevented from sliding out of the clamping groove 911; the limit sliding groove 1011 is matched with the movable column 1021 to prevent the spring 1112 from pushing the stop block 1020 to slide out of the spring mounting groove 1111; wherein, the setting of inclined plane 1022 for the installed part makes in the dog 1020 automatic retraction spring mounting groove 1111 the connecting plate 221 extrusion inclined plane 1022 when sliding in joint groove 911, and the installed part makes the automatic dog 1020 that promotes of spring 1112 block the installed part in sliding in joint groove 911 completely, thereby makes the installation operation of installed part on mount table 141 simpler.
In this embodiment, a rotatable rotating rod 930 with one end extending out of the mounting plate 910 is disposed in the mounting groove 912 along the extending direction of the mounting groove 912; the mounting block 1010 is provided with a threaded through hole 1012 through which the rotating rod 930 is threaded, and the side surface of the mounting cavity 811 is provided with a movable groove 813 through which the rotating rod 930 is threaded in the vertical direction.
Through the arrangement of the rotating rod 930 and the threaded through hole 1012 in the embodiment, the side wall of the mounting groove 912 can limit the mounting block 1010, so that the mounting block 1010 cannot rotate, the rotating rod 930 can rotate to enable the mounting block 1010 to move along the mounting groove 912, and the stop block 1020 can drive the mounting piece at the bottom end of the tunnel to move, so that the outer arch 100 on the mounting piece can be better attached to the mounting surface of the tunnel, and the phenomenon that the local arch part is empty when the concrete is sprayed again in the later period is prevented from existing between the mounted double-layer steel arch support and the mounting surface of the tunnel; due to the arrangement of the movable groove 813, the rotating rod 930 moves up and down in the movable groove 813 when the mounting mechanism 710 moves up and down in the mounting cavity 811, and the operation of the rotating rod 930 is not affected.
In this embodiment, a supporting column 1210 is disposed at the bottom of the mounting cavity 811, a movable cavity 1211 with an upward opening is disposed in the supporting column 1210, a limiting groove 1212 is disposed on a sidewall of the movable cavity 1211 along an up-down direction, and a movable slot 1213 is disposed at an upper end of the sidewall of the supporting column 1210 along a circumferential direction of the supporting column 1210; a threaded lifting rod 1220 with one end extending out of the movable cavity 1211 is arranged in the movable cavity 1211, and a limiting column 1221 extending into the corresponding limiting groove 1212 is arranged at one end part of the threaded lifting rod 1220 positioned in the movable cavity 1211; a worm wheel 1230 is sleeved outside the thread lifting rod 1220, and a thread connecting hole 1231 for the thread matching of the thread lifting rod 1220 is arranged in the middle of the worm wheel 1230; a rotating groove 1232 which is coaxial with the threaded connecting hole 1231 and is sleeved at the upper end of the supporting column 1210 is arranged on the lower side surface of the worm wheel 1230, a clamping rail 1233 matched with the movable clamping groove 1213 is arranged on the side wall of the rotating groove 1232, and the top end of the threaded lifting rod 1220 is connected with the mounting plate 910; a worm 720 with one end extending out of the mounting platform 141 and capable of rotating is arranged in the mounting cavity 811, and the worm 720 is matched with the worm wheel 1230.
Through the structure in this embodiment, make the erection joint of worm wheel 1230 in the top portion of support column 1210 and worm wheel 1230 can rotate when card rail 1233 card goes into movable draw-in groove 1213, because worm wheel 1230 and screw thread lifter 1220 threaded connection and screw thread lifter 1220 tip's spacing post 1221 stretch into corresponding spacing groove 1212 and make screw thread lifter 1220 obtain the restriction unable rotation, thereby make and rotate worm 720 and can drive worm wheel 1230 and rotate thereby make screw thread lifter 1220 go up and down in activity chamber 1211, realize height control, the outer steel bow member 100 that the double-deck steel bow member was strutted of jack-up is laminated with the tunnel installation face mutually, easy operation is convenient simultaneously.
The embodiment also provides a construction method based on any one of the double-layer arch support construction systems for the highway soft rock tunnel, which comprises the following steps:
step one, the same ends of the outer arch 101 and the corresponding inner arch 111 are connected through a connecting mechanism 120, and the side walls of the outer arch 101 and the corresponding inner arch 111 are fixed on the corresponding connecting plates 221 in a bolt or welding mode to form a mounting piece;
step two, pouring and setting the base platform 140 in the tunnel and installing the installation platform 141;
step three, transporting the mounting piece in the step one to a supporting position through transporting equipment;
step four, firstly, the connecting mechanism 120 at the bottom end part of the installation parts connected together at the bottommost end of the tunnel is clamped into the clamping groove 911 on the installation plate 910 in a sliding manner, the rotating rod 930 is rotated to enable the outer arch 101 to be attached to the installation surface of the tunnel, then the fixed plates 201 are connected together through the bolts 202, the adjacent installation parts are connected together, and the installation and splicing of the double-layer steel arch support are completed;
step five, the worm 720 is rotated to drive the mounting plate 910 to move upwards, so that the outer layer steel arch 100 of the double-layer steel arch support spliced and mounted in the step four is attached to the mounting surface of the tunnel;
and step six, drilling an anchor rod mounting hole in the tunnel soil body along the extension direction of the threaded cavity 411, and inserting an anchor rod into the threaded cavity 411 and the anchor rod mounting hole through the through hole 222 in a threaded manner.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. Construction system is strutted to double-deck bow member in soft rock tunnel of highway, including outer steel bow member (100) and inlayer steel bow member (110), its characterized in that: the outer steel arch (100) comprises a plurality of sections of outer arches (101), the inner steel arch (110) comprises a plurality of sections of inner arches (111) which are respectively arranged with the same radian as the corresponding outer arches (101), and a connecting mechanism (120) is arranged between the outer arch (101) and the two ends of the corresponding inner arches (111); the connecting mechanism (120) comprises a fixing mechanism (200) which is used for connecting the same end of the outer arch frame (101) and the corresponding inner arch frame (111) respectively, the fixing mechanism (200) comprises a fixing plate (201), bolt holes are formed in the fixing plate (201) and located on the periphery of the fixing plate, connecting bolts (202) are arranged in the bolt holes, two connecting plates (221) which are arranged in the vertical direction are arranged on the plate surface of the fixing plate (201) in parallel, and the end parts of the outer arch frame (101) and the corresponding inner arch frame (111) are fixedly connected between the connecting plates (221); a connecting rod (240) is connected between the fixing mechanisms (200).
2. The double-deck arch support construction system of highway soft rock tunnel according to claim 1, characterized in that: two ends of the connecting rod (240) are respectively hinged between the corresponding connecting plates (221), two hinged plates (231) arranged along the front-back direction are arranged on the plate surface of each connecting plate (221) in parallel, and opposite hinged holes (232) are arranged on the plate surfaces of the hinged plates (231) opposite to each other; two ends of the connecting rod (240) are respectively provided with a hinge column (314) matched with the corresponding hinge hole (232).
3. The double-deck arch support construction system of highway soft rock tunnel according to claim 1, characterized in that: the connecting rod (240) comprises an inner sleeve (310) of which one end is connected with a connecting plate (221) positioned on one side of the inner arch frame (111), a movable cavity (311) with two open ends is arranged in the inner sleeve (310), and the side wall of the movable cavity (311) is relatively provided with a limiting sliding chute (312) along the length direction of the inner sleeve (310); an outer sleeve (330) with one end extending out of the movable cavity (311) and connected with a connecting plate (221) positioned on one side of the outer arch frame (101) is arranged in the movable cavity (311), and a limiting sliding column (512) extending out of the corresponding limiting sliding groove (312) is arranged at one end part of the outer sleeve (330) positioned in the movable cavity (311); the outer side wall of the inner sleeve (310) is provided with threads (313), the outer sleeve of the inner sleeve (310) is provided with a lantern ring (320), the lantern ring (320) is matched with the threads (313), and the inner ring of the lantern ring (320) is provided with a sliding groove (511) extending into the limiting sliding column (512) along the circumferential direction of the lantern ring (320).
4. The double-deck arch support construction system of highway soft rock tunnel according to claim 3, characterized in that: a sliding clamping groove (611) with an annular cross section is formed in one end portion, located on the outer side wall of the outer sleeve (330), in the circumferential direction of the outer sleeve (330), a rotating ring (340) is sleeved on the outer side wall of the outer sleeve (330), a sliding rail (612) located in the sliding clamping groove (611) and rotating is arranged on the inner side wall of the rotating ring (340), and the hinge column (314) is arranged on the outer side wall of the rotating ring (340).
5. The double-deck arch support construction system of highway soft rock tunnel according to claim 4, characterized in that: be equipped with both ends open-ended screw cavity (411) in outer sleeve (330), all be equipped with through-hole (222) corresponding screw cavity (411) on the face of connecting plate (221), screw cavity (411) female connection has one end to pass through-hole (222) and stretch into anchor rod (350) in the tunnel soil body.
6. The double-deck arch support construction system of highway soft rock tunnel according to claim 1, characterized in that: the tunnel is characterized by further comprising base stations (140) which are pre-arranged in a soil body at the bottom of the tunnel, mounting tables (141) are arranged at two end portions of each base station (140), mounting cavities (811) with upward openings are arranged in the mounting tables (141), clamping grooves (812) are formed in the side walls, close to the opposite sides of the mounting tables (141), of the mounting cavities (811), mounting mechanisms (710) capable of lifting along the mounting cavities (811) are arranged in the mounting cavities (811), each mounting mechanism (710) comprises a mounting plate (910), clamping grooves (911) which are reverse in T-shaped in section and communicated with the upper side of the mounting plate (910) are arranged on the side faces, close to the clamping grooves (812), of the mounting plates (910) in the left-right direction; the clamping groove (911) is communicated with the side wall of the upper side surface part of the mounting plate (910) and is provided with a mounting groove (912), and a limiting mechanism (920) used for blocking the connecting mechanism (120) from sliding out is arranged in the mounting groove (912).
7. The double-deck arch support construction system of highway soft rock tunnel according to claim 6, characterized in that: stop gear (920) is including installing piece (1010) of locating in mounting groove (912), be equipped with spring mounting groove (1111) of opening towards joint groove (911) in installation piece (1010), the last lateral wall of spring mounting groove (1111) is gone up and is equipped with spacing groove (1011) along the extending direction of spring mounting groove (1111), be equipped with dog (1020) that one end stretched into in joint groove (911) through spring (1112) in spring mounting groove (1111), dog (1020) are equipped with inclined plane (1022) towards one side of mount table (141) opposite flank, coupling mechanism (120) make dog (1020) retract spring mounting groove (1111) through extrusion inclined plane (1022), dog (1020) are located and are equipped with on the lateral wall in spring mounting groove (1111) and stretch into removal post (1021) of spacing groove (1011).
8. The double-deck arch support construction system of highway soft rock tunnel according to claim 7, characterized in that: a rotatable rotating rod (930) with one end extending out of the mounting plate (910) is arranged in the mounting groove (912) along the extension direction of the mounting groove (912); the mounting block (1010) is provided with a thread through hole (1012) for the rotating rod (930) to pass through, and the side surface of the mounting cavity (811) is provided with a movable groove (813) for the rotating rod (930) to pass through along the vertical direction.
9. The double-deck arch support construction system of highway soft rock tunnel according to claim 7, characterized in that: a supporting column (1210) is arranged at the bottom of the mounting cavity (811), a movable cavity (1211) with an upward opening is arranged in the supporting column (1210), a limiting groove (1212) is oppositely arranged on the side wall of the movable cavity (1211) along the vertical direction, and a movable clamping groove (1213) is arranged on the outer side wall of the supporting column (1210) and positioned at the upper end part along the circumferential direction of the supporting column (1210); a threaded lifting rod (1220) with one end extending out of the movable cavity (1211) is arranged in the movable cavity (1211), and a limiting column (1221) extending into the corresponding limiting groove (1212) is arranged at one end part of the threaded lifting rod (1220) positioned in the movable cavity (1211); a worm wheel (1230) is sleeved outside the threaded lifting rod (1220), and a threaded connecting hole (1231) for the threaded matching of the threaded lifting rod (1220) is formed in the middle of the worm wheel (1230); a rotating groove (1232) which is coaxial with the threaded connecting hole (1231) and is sleeved at the upper end of the supporting column (1210) is arranged on the lower side surface of the worm wheel (1230), a clamping rail (1233) matched with the movable clamping groove (1213) is arranged on the side wall of the rotating groove (1232), and the top end of the threaded lifting rod (1220) is connected with the mounting plate (910); a worm (720) with one end extending out of the mounting table (141) and capable of rotating is arranged in the mounting cavity (811), and the worm (720) is matched with the worm wheel (1230).
10. The construction method of the double-arch support construction system for the soft rock tunnel of the highway according to any one of claims 1 to 9, comprising the steps of:
connecting the same ends of the outer arch (101) and the corresponding inner arch (111) through a connecting mechanism (120), and fixing the side walls of the outer arch (101) and the corresponding inner arch (111) on the corresponding connecting plates (221) in a bolt or welding mode to assemble a mounting piece;
secondly, pouring and setting a base station (140) in the tunnel and installing an installation table (141);
step three, transporting the mounting piece in the step one to a supporting position through transporting equipment;
step four, firstly, the connecting mechanism (120) at the bottom end part of the installation parts connected together at the bottommost end of the tunnel is clamped into a clamping groove (911) on the installation plate (910) in a sliding mode, the rotating rod (930) is rotated to enable the outer arch centering (101) to be attached to the installation surface of the tunnel, then the fixing plates (201) are connected together through bolts (202), adjacent installation parts are connected together, and installation and splicing of the double-layer steel arch support are completed;
step five, the worm (720) is rotated to drive the mounting plate (910) to move upwards, so that the outer layer steel arch (100) of the double-layer steel arch support spliced and mounted in the step four is attached to the mounting surface of the tunnel;
and sixthly, drilling an anchor rod mounting hole in the tunnel soil body along the extension direction of the threaded cavity (411), and inserting the anchor rod into the threaded cavity (411) and the anchor rod mounting hole through the through hole (222) in a threaded manner.
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| CN111561330A (en) * | 2020-04-30 | 2020-08-21 | 罗波 | Highway bridge and culvert supporting structure for bridge engineering |
| CN113006828A (en) * | 2021-02-26 | 2021-06-22 | 上海交通大学 | Arch frame connecting structure with self-locking function and installation method |
| CN113756846A (en) * | 2021-09-14 | 2021-12-07 | 中铁工程装备集团有限公司 | Steel arch locking device, steel arch and steel arch assembling method |
| CN115653648A (en) * | 2022-12-12 | 2023-01-31 | 华拓(济南)实业投资有限公司 | Steel pipe concrete truss support system |
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| CN106285724A (en) * | 2016-10-14 | 2017-01-04 | 成都理工大学 | A kind of tunnel is by pressure type support system |
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| CN202731940U (en) * | 2012-08-07 | 2013-02-13 | 中国建筑第八工程局有限公司 | Longitudinal connecting device for tunnel steel arch |
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| CN113006828A (en) * | 2021-02-26 | 2021-06-22 | 上海交通大学 | Arch frame connecting structure with self-locking function and installation method |
| CN113756846A (en) * | 2021-09-14 | 2021-12-07 | 中铁工程装备集团有限公司 | Steel arch locking device, steel arch and steel arch assembling method |
| CN113756846B (en) * | 2021-09-14 | 2024-03-22 | 中铁工程装备集团有限公司 | Steel arch locking device, steel arch and steel arch assembling method |
| CN115653648A (en) * | 2022-12-12 | 2023-01-31 | 华拓(济南)实业投资有限公司 | Steel pipe concrete truss support system |
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