CN112647976A - Novel lining trolley for dovetail type large-section tunnel and construction method thereof - Google Patents
Novel lining trolley for dovetail type large-section tunnel and construction method thereof Download PDFInfo
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- CN112647976A CN112647976A CN202011569040.XA CN202011569040A CN112647976A CN 112647976 A CN112647976 A CN 112647976A CN 202011569040 A CN202011569040 A CN 202011569040A CN 112647976 A CN112647976 A CN 112647976A
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- 238000010276 construction Methods 0.000 title claims abstract description 29
- 238000009434 installation Methods 0.000 claims abstract description 13
- 238000009415 formwork Methods 0.000 claims description 58
- 238000003466 welding Methods 0.000 claims description 37
- 230000003014 reinforcing effect Effects 0.000 claims description 29
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 16
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000003351 stiffener Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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Abstract
The invention discloses a novel lining trolley for a dovetail type large-section tunnel and a construction method thereof. The method comprises the following steps: the method comprises the following steps of guide rail laying, portal positioning mechanism installation, support rack installation, double-layer template assembly installation and tunnel lining. The invention can not only improve the stability and reliability of lining, but also balance the stress of the inner wall of the tunnel, and avoid the influence on the lining effect due to uneven stress.
Description
Technical Field
The invention relates to a novel lining trolley for a dovetail type large-section tunnel and a construction method thereof.
Background
The tunnel lining trolley is special equipment which must be used in secondary lining in the tunnel construction process and is used for concrete lining construction of the inner wall of the tunnel. The full-hydraulic automatic walking lining trolley mainly comprises a lining trolley, a full-hydraulic automatic walking lining trolley and a net frame type lining trolley.
The lining trolley in the prior art generally adopts a single-layer top template and a single-layer side template to line the inner wall of a tunnel, and because a supporting rack and a jack directly act on the top template and the side template, the top template and the side template are easily stressed unevenly, and the lining quality and effect are further influenced.
Disclosure of Invention
The invention aims to provide a novel lining trolley for a dovetail type large-section tunnel and a technical scheme of a construction method thereof, aiming at overcoming the defects in the prior art, the stability and the reliability of lining can be improved through a double-layer template assembly, the stress of the inner wall of the tunnel can be balanced, the lining effect is prevented from being influenced due to uneven stress, a support rack acts on an arc top inner template, the arc top inner template disperses the force to act on an arc top outer template through a support mechanism, and the arc top outer template uniformly applies lining pressure to the top surface of the tunnel.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a novel lining cutting platform truck for big section tunnel of dovetail, its characterized in that: the gantry type double-layer template assembly comprises an arc top inner template, an arc top outer panel, lateral inner templates, lateral outer templates and a supporting mechanism, wherein the arc top outer template is connected to the outer side of the arc top inner template through the supporting mechanism; through the design of the portal positioning mechanism, the support strength and stability of the whole lining trolley can be greatly improved, potential safety hazards caused by shaking of the lining trolley during working are prevented, the lifting of the whole lining trolley can be realized, the lining construction of tunnels with different height sizes is met, the support rack can improve the fine adjustment of the height position of the double-layer template assembly, the flexibility and reliability of the lining trolley during use are greatly improved, the construction precision and quality are improved, the double-layer template assembly can improve the stability and reliability of lining, the stress of the inner wall of the tunnel can be balanced, the effect of lining influence caused by uneven stress is avoided, the support rack acts on the arc top inner template, the arc top inner template disperses the force to act on the arc top outer template through the support mechanism, and the arc top outer template uniformly applies the pressure of lining to the top surface of the tunnel, the jack assembly acts on the lateral inner formwork, the lateral inner formwork disperses force to act on the lateral outer formwork through the supporting mechanism, and the lateral outer formwork evenly applies lining pressure to the side face of the tunnel.
Further, the portal positioning mechanism comprises an upper portal beam, a lower portal beam, outer columns and inner columns, the upper portal beam and the lower portal beam are arranged in parallel up and down, the outer columns are uniformly arranged between the upper portal beam and the lower portal beam which are positioned at one side close to the lateral inner template, the inner columns are uniformly arranged between the upper portal beam and the lower portal beam which are positioned at one side far away from the lateral inner template, a first reinforcing rod is arranged between the inner columns and the outer columns, a second reinforcing rod is arranged between two adjacent inner columns or two adjacent outer columns, the upper portal beam and the lower portal beam can be supported through the inner columns and the outer columns, the stability and the reliability of connection between the upper portal beam and the lower portal beam are improved, the stability and the strength of connection between the inner columns and the outer columns are improved by the first reinforcing rods, the stability and the strength of connection between two adjacent inner columns or two adjacent outer columns are improved by the second reinforcing rods, further improving the stability and reliability of the whole lining trolley.
Further, be provided with the sleeve on the bottom surface of lower door beam, telescopic below is provided with the slider, and the top of slider is provided with first jacking cylinder, and first jacking cylinder is located the sleeve, and slider sliding connection can drive whole lining cutting platform truck through the slider and remove along the guide rail on the guide rail, and first jacking cylinder can promote whole lining cutting platform truck and rise or descend, satisfies the lining cutting construction requirement of co-altitude not.
Furthermore, all be provided with the otic placode on outer column and the telescopic side, the sleeve that is located the inner column below is connected ground through a ground jack, be provided with the linkage plate between two sleeves that are located the inner column and outer column below, the linkage plate passes through basic jack and connects ground, the design of otic placode has improved the stability of being connected between ground jack, jack subassembly and sleeve or the inner column, basic jack can be through the support to linking up the board, and then realize the support to whole lining cutting platform truck.
Further, the support rack includes the rack crossbeam that the level evenly set up, through horizon bar fixed connection between two adjacent rack crossbeams, evenly be provided with the rack post on the top surface of every rack crossbeam, every rack post is connected with the ejector pad through the telescopic link, the arc top inner formword is connected to the ejector pad, be provided with the boosting subassembly between two adjacent ejector pads, rack crossbeam and horizon bar have improved the stability of whole support rack, it reciprocates to promote the telescopic link through the boosting subassembly to drive the ejector pad, and then can adjust the high position of double-deck template subassembly.
Further, the boosting assembly comprises a balance plate, a triangular frame and a second jacking oil cylinder, the balance plate is fixedly arranged between two adjacent jacking blocks, the triangular frame is arranged at the bottom of the balance plate, the triangular frame is connected with a rack cross beam through the second jacking oil cylinder, the triangular frame can be driven by the second jacking oil cylinder to push the balance plate to move up and down, then the jacking blocks on two sides can be driven to move up and down, and the pushing of the double-layer template assembly is realized.
Further, supporting mechanism includes the support column and supports the stiffener, and the support column is evenly located between arc top inner formword and the arc top exterior sheathing or between side direction inner formword and the side direction exterior sheathing, supports stiffener fixed connection between two adjacent support columns, can be with on arc top inner formword and the side direction inner formword effort of acting on in arc top exterior sheathing and the side direction exterior sheathing through the support column, improves the lifting surface area of arc top exterior sheathing and side direction exterior sheathing greatly, prevents to produce the deformation.
Further, the arc top inner template, the arc top outer template, the lateral inner template and the lateral outer template are uniformly provided with operation windows.
Furthermore, the jack assembly comprises a first lateral jack, a second lateral jack and a third lateral jack, the first lateral jack, the second lateral jack and the third lateral jack are sequentially arranged between the lateral inner formwork and the outer stand column from top to bottom, and supporting strength and stability of the lateral inner formwork and the lateral outer formwork are improved.
The construction method of the novel lining trolley for the dovetail type large-section tunnel is characterized by comprising the following steps of:
1) laying of guide rails
Firstly, the size of the trolley is determined according to the size of the tunnel, the arrangement position of the guide rails is determined, the guide rails with proper sizes are selected, the guide rails penetrate through the tunnel from one side of a tunnel inlet and are laid towards the other side of the tunnel, two guide rails are distributed on each side in parallel, the distance between every two adjacent guide rails on the two sides is kept equal, the lining trolley can stably enter and exit the tunnel conveniently, the integral assembly or disassembly of the lining trolley is facilitated, and the safety is improved;
2) mounting of gantry positioning mechanism
a. Firstly, determining the size of a door frame according to design requirements, forming the required door frame through welding processing, and then determining the size of a door frame positioning mechanism according to the size of the door frame;
b. then selecting corresponding upper door beams, lower door beams, inner upright columns and outer upright columns, fixing the upper door beams above the lower door beams through the inner upright columns or the outer upright columns in a welding manner, welding first reinforcing rods between the inner upright columns and the outer upright columns, and welding second reinforcing rods between two adjacent inner upright columns or two adjacent outer upright columns, so that the strength and the stability of connection among the upper door beams, the lower door beams, the inner upright columns and the outer upright columns are greatly improved, and potential safety hazards caused by inclination of a lining trolley are avoided;
c. welding and fixing the processed upper door beam and two sides of the bottom of the door frame, symmetrically installing sleeves on two sides of the bottom surface of the lower door beam, and installing lug plates along the outer sides of the sleeves and the outer sides of the outer stand columns, so that a first jacking oil cylinder and a ground jacking jack can be conveniently installed;
d. selecting a sliding block with a proper size, installing a first jacking oil cylinder along the top of the sliding block, hoisting a gantry through a crane, respectively installing the first jacking oil cylinder with the sliding block into the corresponding sleeve, hoisting the gantry onto the guide rail through the crane, limiting the sliding block on the guide rail, conveniently checking whether the sliding block is completely attached to the slide rail or not, and avoiding the influence on the operation of the lining trolley caused by a large size error;
3) mounting of support stand
a. Firstly, determining the size of a support rack according to the size of a portal, processing corresponding rack cross beams and horizontal rods, distributing the rack cross beams at equal intervals horizontally, and fixedly connecting two adjacent rack cross beams through the horizontal rods by welding to improve the stability and reliability of the whole support rack;
b. then, installing the rack columns at equal intervals along the top surface of each rack cross beam, selecting proper jacking blocks, connecting the jacking blocks with the corresponding rack columns through telescopic rods, fixedly connecting two adjacent jacking blocks through a balance plate, installing a tripod at the bottom of the balance plate, selecting proper second jacking oil cylinders according to the lifting heights of the jacking blocks, connecting the second jacking oil cylinders between the tripod and the rack cross beams, driving the balance plate to ascend or descend through the tripod by the second jacking oil cylinders, further driving the jacking blocks to push the arc top inner formworks to ascend and descend, and improving the lining effect;
c. then, mounting a pushing block and a rack column on the next rack cross beam until all the rack cross beams are mounted;
d. finally, the processed supporting rack is hoisted to the upper part of the portal frame through a crane, corresponding rack jacks are selected according to requirements, and the supporting rack is installed on the top surface of the portal frame through the rack jacks, so that the stability and reliability of connection between the supporting rack and the portal frame are improved;
4) double-deck formwork assembly installation
a. Firstly, determining the sizes of an arc top inner template and an arc top outer template according to design requirements, processing the corresponding arc top inner template and the arc top outer template, and uniformly arranging operation windows on the arc top inner template and the arc top outer template;
b. then horizontally placing the arc top inner template, uniformly welding support columns along the outer circumferential side surface of the arc top inner template, welding and fixing two adjacent support columns through support reinforcing rods, after the outer side surface of the whole arc top inner template is processed, hoisting the processed arc top outer template to the position above the arc top inner template through a crane, lowering the arc top outer template to be in contact with the top ends of the support columns, sequentially welding and fixing each support column and the arc top outer template, and simultaneously welding and fixing two adjacent support columns through the support reinforcing rods, so that stress contact points between the arc top inner template and the arc top outer template can be increased, the force acting on the arc top outer template is more uniform, the lining effect and quality are improved, and the arc top outer template can be prevented from deforming to influence lining construction;
c. determining the sizes of the lateral inner template and the lateral outer template according to design requirements, processing the corresponding lateral inner template and the lateral outer template, and uniformly arranging operation windows on the lateral inner template and the lateral outer template;
d. the lateral inner formwork is horizontally placed, the supporting columns are uniformly welded along the outer circumferential side face of the lateral inner formwork, two adjacent supporting columns are welded and fixed through the supporting reinforcing rods, after the outer side face of the whole lateral inner formwork is processed, the processed lateral outer formwork is hoisted to the position above the lateral inner formwork through a crane, the lateral outer formwork is lowered to be in contact with the top ends of the supporting columns, each supporting column and the lateral outer formwork are sequentially welded and fixed, and meanwhile, the two adjacent supporting columns are welded and fixed through the supporting reinforcing rods, so that stress contact points between the lateral inner formwork and the lateral outer formwork can be increased, the force acting on the lateral outer formwork is more uniform, the lining effect and quality are improved, and the lateral outer formwork is prevented from deforming to influence lining construction;
e. horizontally hoisting the arc top inner template and the arc top outer template by a crane, vertically hoisting the lateral inner template and the lateral outer template, hinging the top end of the lateral inner template with two ends of the arc top inner template, and hinging the top end of the lateral outer template with two ends of the arc top outer template;
f. finally, hoisting the processed double-layer template assembly to the upper part of the supporting rack, welding and fixing the contact position of the arc top inner template and the jacking block, selecting proper first lateral jacks, second lateral jacks and third lateral jacks, sequentially installing the first lateral jacks, the second lateral jacks and the third lateral jacks between the lateral inner template and the outer stand columns from top to bottom, and removing the crane after the installation of all the first lateral jacks, the second lateral jacks and the third lateral jacks is finished, so that the installation stability of the double-layer template assembly is improved, and the lining effect and quality of the inner wall of the tunnel are improved;
5) tunnel lining
a. After the lining trolley is installed, the lining trolley is pushed and pulled to a set position in a tunnel along a guide rail through a traction device, a sleeve below an inner upright post is obliquely connected with the bottom surface through a ground jack, a connecting plate is installed between the inner upright post and the sleeve below an outer upright post, the connecting plate is connected with the ground through a foundation jack, and a first jacking oil cylinder and a second jacking oil cylinder are connected with an external oil supply device;
b. then starting a first jacking oil cylinder, lifting the gantry to a set height position, supporting the gantry positioning mechanism through a ground jack and a basic jack, starting a second jacking oil cylinder according to the distance between the arc top outer template and the tunnel arc top, and completely attaching the arc top outer template to the inner wall of the tunnel;
c. starting a jack assembly, and supporting the lateral inner template and the lateral outer template through a first lateral jack, a second lateral jack and a third lateral jack to enable the lateral outer template to be completely attached to the inner wall of the tunnel;
d. and finally, carrying out lining construction, and dragging the lining trolley to the outside of the tunnel through traction equipment after the construction is finished.
The using method has simple steps, is beneficial to the installation of the lining trolley, greatly improves the overall stability and reliability of the lining trolley, and simultaneously ensures that the stress on the inner wall of the tunnel is uniform during lining and improves the quality of secondary lining.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. through portal positioning mechanism's design, not only can improve the support intensity and the stability of whole lining cutting platform truck greatly, prevent that the lining cutting platform truck from producing the potential safety hazard because of rocking at the during operation, can realize the lift of whole lining cutting platform truck moreover, satisfy the lining cutting construction in different height dimension tunnels.
2. The supporting rack can improve the height position of the double-layer template assembly and finely adjust, the flexibility and the reliability of the lining trolley during use are greatly improved, and the construction precision and quality are improved.
3. The double-layer template component can improve the stability and reliability of the lining, the stress of the inner wall of the tunnel can be balanced, the lining effect is prevented from being influenced due to uneven stress, the supporting rack acts on the arc top inner template, the arc top inner template dispersedly acts on the arc top outer template through the supporting mechanism, and the arc top outer template uniformly exerts the pressure of the lining on the top surface of the tunnel.
4. The jack assembly acts on the lateral inner formwork, the lateral inner formwork disperses force to act on the lateral outer formwork through the supporting mechanism, and the lateral outer formwork evenly applies lining pressure to the side face of the tunnel.
5. The using method has simple steps, is beneficial to the installation of the lining trolley, greatly improves the overall stability and reliability of the lining trolley, and simultaneously ensures that the stress on the inner wall of the tunnel is uniform during lining and improves the quality of secondary lining.
Description of the drawings:
the invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is an effect diagram of a novel lining trolley for a dovetail type large-section tunnel and a novel lining trolley in a construction method thereof according to the present invention;
FIG. 2 is a schematic structural view of a gantry positioning mechanism of the present invention;
FIG. 3 is a schematic view of the connection between the support mechanism and the inner arc top form of the present invention;
fig. 4 is a schematic view of the connection between the pushing block, the rack column and the rack beam.
In the figure: 1-portal frame; 2-outer columns; 3-inner upright column; 4-a guide rail; 5-a first jacking oil cylinder; 6-a slide block; 7-a support stand; 8-a rack jack; 9-arc top inner template; 10-arc top outer template; 11-lateral inner formworks; 12-lateral outer formworks; 13-a support mechanism; 14-a first lateral jack; 15-a second lateral jack; 16-a third lateral jack; 17-a foundation jack; 18-jack ground jack; 19-lower door beam; 20-a first reinforcement bar; 21-a second reinforcement bar; 22-a sleeve; 23-ear plate; 24-a support column; 25-support reinforcing rods; 26-job window; 27-gantry beam; 28-a gantry column; 29-pushing the pushing block; 30-a telescopic rod; 31-a balancing plate; 32-tripod; 33-a second jacking cylinder; 34-upper door beam.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terms first, second and the like in the description and in the claims, and in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
As shown in fig. 1 to 4, the lining trolley for the swallow-tailed large-section tunnel comprises a portal frame 1, a portal frame positioning mechanism, a support portal frame 7 and a double-layer template assembly, wherein the bottom surface of the portal frame 1 is connected with a guide rail 4 through the portal frame positioning mechanism, the portal frame positioning mechanism comprises an upper portal beam 34, a lower portal beam 19, outer upright posts 2 and inner upright posts 3, the upper portal beam 34 and the lower portal beam 19 are arranged in parallel up and down, the outer upright posts 2 are uniformly arranged between the upper portal beam 34 and the lower portal beam 19 which are positioned at one side close to a lateral inner template 11, the inner upright posts 3 are uniformly arranged between the upper portal beam 34 and the lower portal beam 19 which are positioned at one side far away from the lateral inner template 11, a first reinforcing rod 20 is arranged between the inner upright posts 3 and the outer upright posts 2, a second reinforcing rod 21 is arranged between two adjacent inner upright posts 3 or two adjacent outer upright posts 2, the upper portal beam 34 and the lower portal beam 19 can be supported through the, the stability and the reliability of being connected between last door beam 34 and the door beam 19 down have been improved, and first stiffener 20 has improved the stability and the intensity of being connected between inner column 3 and the outer column 2, and second stiffener 21 has improved the stability and the intensity of being connected between two adjacent inner column 3 or two adjacent outer columns 2, further improves the stability and the reliability of whole lining cutting platform truck. Be provided with sleeve 22 on the bottom surface of door sill 19 down, the below of sleeve 22 is provided with slider 6, the top of slider 6 is provided with first jacking cylinder 5, first jacking cylinder 5 is located sleeve 22, slider 6 sliding connection is on guide rail 4, can drive whole lining cutting platform truck through slider 6 and remove along guide rail 4, first jacking cylinder 5 can promote whole lining cutting platform truck and rise or descend, satisfies the lining cutting construction requirement of co-altitude not. All be provided with otic placode 23 on the side of outer column 2 and sleeve 22, sleeve 22 that is located the inner column 3 below connects ground through ground jack 18, be provided with the linkage plate between two sleeves 22 that are located the inner column 3 and outer column 2 below, the linkage plate passes through basic jack 17 and connects ground, the design of otic placode 23 has improved ground jack 18, the stability of being connected between jack subassembly and sleeve 22 or the inner column 3, basic jack 17 can be through the support to the linkage plate, and then realize the support to whole lining cutting platform truck.
Support rack 7 passes through jack-stand 8 to be connected in portal 1's top, support rack 7 includes the rack crossbeam 27 that the level evenly set up, through horizon bar fixed connection between two adjacent rack crossbeams 27, evenly be provided with rack post 28 on every rack crossbeam 27's the top surface, every rack post 28 is connected with ejector pad 29 through telescopic link 30, ejector pad 29 connects arc top inner formword 9, be provided with the boosting subassembly between two adjacent ejector pad 29, rack crossbeam 27 and horizon bar have improved the stability of whole support rack 7, promote telescopic link 30 through the boosting subassembly and drive ejector pad 29 and reciprocate, and then can adjust the high position of double-deck template subassembly. The boosting assembly comprises a balance plate 31, a tripod 32 and a second jacking oil cylinder 33, the balance plate 31 is fixedly arranged between two adjacent jacking blocks 29, the tripod 32 is arranged at the bottom of the balance plate 31, the tripod 32 is connected with the rack cross beam 27 through the second jacking oil cylinder 33, the tripod 32 can be driven through the second jacking oil cylinder 33 to push the balance plate 31 to move up and down, and then the jacking blocks 29 on two sides can be driven to move up and down, so that the jacking of the double-layer formwork assembly is realized.
The double-layer template assembly comprises an arc top inner template 9, an arc top outer panel, a lateral inner template 11, a lateral outer template 12 and a supporting mechanism 13, the arc top outer template 10 is connected to the outer side of the arc top inner template 9 through the supporting mechanism 13, the lateral outer template 12 is connected to the outer side of the lateral inner template 11 through the supporting mechanism 13, the top ends of the two lateral inner templates 11 are hinged to two ends of the arc top inner template 9, the top ends of the two lateral outer templates 12 are hinged to two ends of the arc top outer template 10, the supporting mechanism 13 comprises supporting columns 24 and supporting reinforcing rods 25, the supporting columns 24 are uniformly arranged between the arc top inner template 9 and the arc top outer template 10 or between the lateral inner template 11 and the lateral outer template 12, the supporting reinforcing rods 25 are fixedly connected between the two adjacent supporting columns 24, the force on the arc top inner template 9 and the lateral inner template 11 can be applied to the arc top outer template 10 and the lateral outer template 12 through the supporting, the stress areas of the arc top outer template 10 and the lateral outer template 12 are greatly improved, and deformation is prevented. The arc top inner template 9, the arc top outer template 10, the lateral inner template 11 and the lateral outer template 12 are uniformly provided with operation windows 26.
The lateral inner formworks 11 on the two sides are respectively connected with the portal positioning mechanism on the corresponding side through the jack component, the jack component comprises a first lateral jack 14, a second lateral jack 15 and a third lateral jack 16, the first lateral jack 14, the second lateral jack 15 and the third lateral jack 16 are sequentially arranged between the lateral inner formworks 11 and the outer upright post 2 from top to bottom, and the supporting strength and stability of the lateral inner formworks 11 and the lateral outer formworks 12 are improved. Through the design of the portal positioning mechanism, the supporting strength and stability of the whole lining trolley can be greatly improved, potential safety hazards caused by shaking of the lining trolley during working are prevented, the lifting of the whole lining trolley can be realized, the lining construction of tunnels with different height sizes is met, the supporting rack 7 can improve the fine adjustment of the height position of the double-layer template assembly, the flexibility and reliability of the lining trolley during use are greatly improved, the construction precision and quality are improved, the stability and reliability of the lining can be improved by the double-layer template assembly, the stress on the inner wall of the tunnel can be balanced, the influence on the lining effect caused by uneven stress is avoided, the supporting rack 7 acts on the arc top inner template 9, the arc top inner template 9 disperses the force on the arc top outer template 10 through the supporting mechanism 13, and the arc top outer template 10 uniformly applies the lining pressure on the top surface of the tunnel, the jack assembly acts on the lateral inner formwork 11, the lateral inner formwork 11 disperses force to act on the lateral outer formwork 12 through the supporting mechanism 13, and the lateral outer formwork 12 uniformly applies lining pressure to the side face of the tunnel.
The construction method of the novel lining trolley for the dovetail type large-section tunnel comprises the following steps:
1) laying of guide rails 4
Firstly, the size of the trolley is determined according to the size of the tunnel, the arrangement position of the guide rails 4 is determined, the guide rails 4 with proper sizes are selected, the guide rails 4 penetrate through the tunnel from one side of an inlet of the tunnel and are laid towards the other side of the tunnel, two guide rails 4 are distributed on each side in parallel, the distance between every two adjacent guide rails 4 on the two sides is kept equal, the lining trolley can stably enter and exit the tunnel, the integral assembly or disassembly of the lining trolley is facilitated, and the safety is improved;
2) mounting of gantry positioning mechanism
a. Firstly, determining the size of a portal 1 according to design requirements, forming the required portal 1 through welding processing, and then determining the size of a portal positioning mechanism according to the size of the portal 1;
b. then selecting corresponding upper door beams 34, lower door beams 19, inner upright columns 3 and outer upright columns 2, welding and fixing the upper door beams 34 above the lower door beams 19 through the inner upright columns 3 or the outer upright columns 2, welding first reinforcing rods 20 between the inner upright columns 3 and the outer upright columns 2, and welding second reinforcing rods 21 between two adjacent inner upright columns 3 or two adjacent outer upright columns 2, so that the strength and the stability of connection among the upper door beams 34, the lower door beams 19, the inner upright columns 3 and the outer upright columns 2 are greatly improved, and potential safety hazards caused by inclination of a lining trolley are avoided;
c. welding and fixing the processed upper door beam 34 and two sides of the bottom of the portal 1, symmetrically installing sleeves 22 on two sides of the bottom surface of the lower door beam 19, and installing lug plates 23 along the outer sides of the sleeves 22 and the outer sides of the outer upright posts 2, so that a first jacking oil cylinder 5 and a ground jacking jack 18 can be conveniently installed;
d. selecting a sliding block 6 with a proper size, installing a first jacking oil cylinder 5 along the top of the sliding block 6, hoisting the portal 1 through a crane, respectively installing the first jacking oil cylinder 5 with the sliding block 6 into the corresponding sleeve 22, hoisting the portal 1 to the guide rail 4 through the crane, limiting the sliding block 6 on the guide rail 4, conveniently checking whether the sliding block 6 is completely attached to the slide rail, and avoiding the influence on the operation of the lining trolley caused by a large size error;
3) mounting of the support stand 7
a. Firstly, determining the size of the support rack 7 according to the size of the portal 1, processing corresponding rack cross beams 27 and horizontal rods, distributing the rack cross beams 27 at equal intervals horizontally, and fixedly connecting two adjacent rack cross beams 27 through the horizontal rods by welding to improve the stability and reliability of the whole support rack 7;
b. then, installing the gantry columns 28 at equal intervals along the top surface of each gantry beam 27, selecting proper jacking blocks 29, connecting the jacking blocks 29 with the corresponding gantry columns 28 through telescopic rods 30, fixedly connecting two adjacent jacking blocks 29 through balance plates 31, installing triangular supports 32 at the bottoms of the balance plates 31, selecting proper second jacking oil cylinders 33 according to the lifting heights of the jacking blocks 29, connecting the second jacking oil cylinders 33 between the triangular supports 32 and the gantry beams 27, driving the balance plates 31 to ascend or descend through the triangular supports 32 through the second jacking oil cylinders 33, further driving the jacking blocks 29 to push the arc jacking inner formworks 9 to ascend and descend, and improving the lining effect;
c. then, mounting the pushing block 29 and the rack column 28 on the next rack cross beam 27 until all the rack cross beams 27 are mounted;
d. finally, the processed supporting rack 7 is hoisted to the upper side of the portal 1 through a crane, the corresponding rack jack 8 is selected according to requirements, the supporting rack 7 is installed on the top surface of the portal 1 through the rack jack 8, and the stability and reliability of connection between the supporting rack 7 and the portal 1 are improved;
4) double-deck formwork assembly installation
a. Firstly, determining the sizes of an arc top inner template 9 and an arc top outer template 10 according to design requirements, processing the corresponding arc top inner template 9 and the corresponding arc top outer template 10, and uniformly arranging operation windows 26 on the arc top inner template 9 and the arc top outer template 10;
b. then horizontally placing the arc top inner template 9, uniformly welding supporting columns 24 along the outer circumferential side surface of the arc top inner template 9, fixedly welding two adjacent supporting columns 24 through supporting reinforcing rods 25, after the outer side surface of the whole arc top inner template 9 is processed, hoisting the processed arc top outer template 10 to the upper part of the arc top inner template 9 by a crane, lowering the arc top outer template 10 to be contacted with the top ends of the supporting columns 24, sequentially welding and fixing each supporting column 24 and the arc top outer template 10, meanwhile, the two adjacent support columns 24 are welded and fixed through the support reinforcing rods 25, so that stressed contact points between the arc top inner template 9 and the arc top outer template 10 can be increased, the force acting on the arc top outer template 10 is more uniform, the lining effect and quality are improved, and the arc top outer template 10 can be prevented from deforming to influence lining construction;
c. then, determining the sizes of the lateral inner template 11 and the lateral outer template 12 according to the design requirements, processing the corresponding lateral inner template 11 and the lateral outer template 12, and uniformly forming operation windows 26 on the lateral inner template 11 and the lateral outer template 12;
d. the lateral inner template 11 is horizontally placed, the supporting columns 24 are uniformly welded along the outer circumferential side surface of the lateral inner template 11, the two adjacent supporting columns 24 are welded and fixed through the supporting reinforcing rods 25, after the outer side surface of the whole lateral inner template 11 is processed, hoisting the processed lateral outer formworks 12 to the upper part of the lateral inner formworks 11 by a crane, lowering the lateral outer formworks 12 to be contacted with the top ends of the supporting columns 24, sequentially welding and fixing each supporting column 24 and the lateral outer formworks 12, meanwhile, the two adjacent support columns 24 are welded and fixed through the support reinforcing rods 25, so that stressed contact points between the lateral inner formwork 11 and the lateral outer formwork 12 can be increased, the force acting on the lateral outer formwork 12 is more uniform, the lining effect and quality are improved, and the lateral outer formwork 12 can be prevented from deforming to influence lining construction;
e. horizontally hoisting the arc top inner template 9 and the arc top outer template 10 by a crane, vertically hoisting the lateral inner template and the lateral outer template 12, hinging the top end of the lateral inner template 11 with two ends of the arc top inner template 9, and hinging the top end of the lateral outer template 12 with two ends of the arc top outer template 10;
f. finally, hoisting the processed double-layer formwork assembly to the upper side of the supporting rack 7, welding and fixing the contact position of the arc top inner formwork 9 and the jacking block 29, selecting proper first lateral jacks 14, second lateral jacks 15 and third lateral jacks 16, sequentially installing the first lateral jacks 14, the second lateral jacks 15 and the third lateral jacks 16 between the lateral inner formwork 11 and the outer upright post 2 from top to bottom, and removing the crane after the installation of all the first lateral jacks 14, the second lateral jacks 15 and the third lateral jacks 16 is finished, so that the installation stability of the double-layer formwork assembly is improved, and meanwhile, the lining effect and quality of the inner wall of the tunnel are improved;
5) tunnel lining
a. After the lining trolley is installed, the lining trolley is pushed and pulled to a set position in a tunnel along a guide rail 4 through a traction device, a sleeve 22 below an inner upright post 3 is obliquely connected with the bottom surface through a ground jack 18, a connecting plate is installed between the inner upright post 3 and the sleeve 22 below an outer upright post 2, the connecting plate is connected with the ground through a basic jack 17, and a first jacking oil cylinder 5 and a second jacking oil cylinder 33 are connected with an external oil supply device;
b. then starting a first jacking oil cylinder 5, lifting the portal 1 to a set height position, supporting the portal positioning mechanism through a ground jack 18 and a foundation jack 17, starting a second jacking oil cylinder 33 according to the distance between the arc top outer template 10 and the tunnel arc top, and completely attaching the arc top outer template 10 to the inner wall of the tunnel;
c. starting a jack assembly, and supporting the lateral inner formwork 11 and the lateral outer formwork 12 through a first lateral jack 14, a second lateral jack 15 and a third lateral jack 16 to enable the lateral outer formwork 12 to be completely attached to the inner wall of the tunnel;
d. and finally, carrying out lining construction, and dragging the lining trolley to the outside of the tunnel through traction equipment after the construction is finished.
The using method has simple steps, is beneficial to the installation of the lining trolley, greatly improves the overall stability and reliability of the lining trolley, and simultaneously ensures that the stress on the inner wall of the tunnel is uniform during lining and improves the quality of secondary lining.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple variations, equivalent substitutions or modifications based on the present invention to achieve substantially the same technical effects are within the scope of the present invention.
Claims (8)
1. The utility model provides a novel lining cutting platform truck for big section tunnel of dovetail, its characterized in that: including portal, portal positioning mechanism, support rack and double-deck template subassembly, the underrun of portal the portal positioning mechanism connects the guide rail, the support rack passes through the jack of rack and connects the top of portal, double-deck template subassembly includes arc top inner formword, arc top outer panel, side direction inner formword, side direction outer formword and supporting mechanism, the arc top outer formword passes through supporting mechanism connects the outside of arc top inner formword, the side direction outer formword passes through supporting mechanism connects the outside of side direction inner formword, two the top of side direction inner formword with the both ends of arc top inner formword are articulated, two the top of side direction outer formword with the both ends of arc top outer formword are articulated, both sides the side direction inner formword passes through the jack subassembly respectively and connects corresponding one side the portal positioning mechanism, portal positioning mechanism includes upper beam, door beam, The support rack comprises rack cross beams which are horizontally and uniformly arranged, wherein the two adjacent rack cross beams are fixedly connected through a horizontal rod, a rack column is uniformly arranged on the top surface of each rack cross beam, each rack column is connected with a top push block through a telescopic rod, and the top push block is connected with the arc top inner template, and a boosting assembly is arranged between every two adjacent pushing blocks.
2. The novel lining trolley for the dovetail large-section tunnel according to claim 1, wherein: be provided with the sleeve on the bottom surface of door beam down, telescopic below is provided with the slider, the top of slider is provided with first jacking cylinder, first jacking cylinder is located in the sleeve, slider sliding connection be in on the guide rail.
3. The novel lining trolley for the dovetail large-section tunnel according to claim 2, wherein: the outer column with all be provided with the otic placode on telescopic side, be located the inner column below the sleeve is through ground jack connection ground, be located the inner column with two of outer column below be provided with the joint board between the sleeve, the joint board passes through basic jack connection ground.
4. The novel lining trolley for the dovetail large-section tunnel according to claim 1, wherein: the boosting assembly comprises a balance plate, a tripod and a second jacking oil cylinder, the balance plate is fixedly arranged between two adjacent jacking blocks, the tripod is arranged at the bottom of the balance plate, and the tripod is connected with the rack beam through the second jacking oil cylinder.
5. The novel lining trolley for the dovetail large-section tunnel according to claim 1, wherein: the supporting mechanism comprises supporting columns and supporting reinforcing rods, the supporting columns are evenly arranged between the arc top inner formwork and the arc top outer formwork or between the lateral inner formwork and the lateral outer formwork, and the supporting reinforcing rods are fixedly connected between every two adjacent supporting columns.
6. The novel lining trolley for the dovetail large-section tunnel according to claim 1, wherein: and the arc top inner template, the arc top outer template, the lateral inner template and the lateral outer template are uniformly provided with operation windows.
7. The novel lining trolley for the dovetail large-section tunnel according to claim 1, wherein: the jack assembly comprises a first lateral jack, a second lateral jack and a third lateral jack, and the first lateral jack, the second lateral jack and the third lateral jack are sequentially arranged between the lateral inner formwork and the outer upright column from top to bottom.
8. The construction method of the novel lining trolley for the dovetail large-section tunnel according to any one of claims 1 to 7, characterized by comprising the following steps:
1) laying of guide rails
Firstly, determining the size of a trolley according to the size of a tunnel, determining the arrangement position of guide rails, selecting guide rails with proper sizes, penetrating the guide rails through the tunnel from one side of a tunnel inlet, and laying the guide rails to the other side of the tunnel, wherein two guide rails are distributed on each side in parallel, and the distance between two adjacent guide rails on two sides is kept equal;
2) mounting of gantry positioning mechanism
a. Firstly, determining the size of a door frame according to design requirements, forming the required door frame through welding processing, and then determining the size of a door frame positioning mechanism according to the size of the door frame;
b. then selecting corresponding upper door beams, lower door beams, inner upright columns and outer upright columns, fixing the upper door beams above the lower door beams through the inner upright columns or the outer upright columns in a welding manner, welding first reinforcing rods between the inner upright columns and the outer upright columns, and welding second reinforcing rods between two adjacent inner upright columns or two adjacent outer upright columns;
c. welding and fixing the processed upper door beam and two sides of the bottom of the door frame, symmetrically installing sleeves on two sides of the bottom surface of the lower door beam, and installing lug plates along the outer sides of the sleeves and the outer side of the outer upright post;
d. selecting a sliding block with a proper size, installing a first jacking oil cylinder along the top of the sliding block, hoisting the gantry through a crane, respectively installing the first jacking oil cylinders with the sliding blocks into corresponding sleeves, hoisting the gantry onto a guide rail through the crane, and limiting the sliding block on the guide rail;
3) mounting of support stand
a. Firstly, determining the size of a support rack according to the size of a portal, processing corresponding rack cross beams and horizontal rods, distributing the rack cross beams at equal intervals horizontally, and fixedly connecting two adjacent rack cross beams through the horizontal rods by welding;
b. then, mounting the rack columns at equal intervals along the top surface of each rack cross beam, selecting proper pushing blocks, connecting the pushing blocks with the corresponding rack columns through telescopic rods, fixedly connecting two adjacent pushing blocks through a balance plate, mounting a tripod at the bottom of the balance plate, selecting proper second jacking oil cylinders according to the lifting heights of the pushing blocks, and connecting the second jacking oil cylinders between the tripod and the rack cross beams;
c. then, mounting a pushing block and a rack column on the next rack cross beam until all the rack cross beams are mounted;
d. finally, hoisting the processed support rack to the upper part of the portal by a crane, selecting a corresponding rack jack according to requirements, and installing the support rack on the top surface of the portal by the rack jack;
4) double-deck formwork assembly installation
a. Firstly, determining the sizes of an arc top inner template and an arc top outer template according to design requirements, processing the corresponding arc top inner template and the arc top outer template, and uniformly arranging operation windows on the arc top inner template and the arc top outer template;
b. then horizontally placing the arc top inner template, uniformly welding support columns along the outer circumferential side surface of the arc top inner template, fixedly welding two adjacent support columns through support reinforcing rods, after the outer side surface of the whole arc top inner template is processed, hoisting the processed arc top outer template to the position above the arc top inner template through a crane, lowering the arc top outer template to be in contact with the top ends of the support columns, sequentially welding and fixing each support column and the arc top outer template, and simultaneously fixedly welding two adjacent support columns through the support reinforcing rods;
c. determining the sizes of the lateral inner template and the lateral outer template according to design requirements, processing the corresponding lateral inner template and the lateral outer template, and uniformly arranging operation windows on the lateral inner template and the lateral outer template;
d. horizontally placing the lateral inner template, uniformly welding support columns along the outer circumferential side face of the lateral inner template, welding and fixing two adjacent support columns through support reinforcing rods, after the outer side face of the whole lateral inner template is processed, hoisting the processed lateral outer template to the upper side of the lateral inner template through a crane, lowering the lateral outer template to be in contact with the top ends of the support columns, sequentially welding and fixing each support column and the lateral outer template, and meanwhile welding and fixing two adjacent support columns through the support reinforcing rods;
e. horizontally hoisting the arc top inner template and the arc top outer template by a crane, vertically hoisting the lateral inner template and the lateral outer template, hinging the top end of the lateral inner template with two ends of the arc top inner template, and hinging the top end of the lateral outer template with two ends of the arc top outer template;
f. hoisting the processed double-layer template assembly to the upper part of the supporting rack, welding and fixing the contact position of the arc top inner template and the jacking block, selecting proper first lateral jacks, second lateral jacks and third lateral jacks, sequentially installing the first lateral jacks, the second lateral jacks and the third lateral jacks between the lateral inner template and the outer stand column from top to bottom, and removing the crane after all the first lateral jacks, the second lateral jacks and the third lateral jacks are installed;
5) tunnel lining
a. After the lining trolley is installed, the lining trolley is pushed and pulled to a set position in a tunnel along a guide rail through a traction device, a sleeve below an inner upright post is obliquely connected with the bottom surface through a ground jack, a connecting plate is installed between the inner upright post and the sleeve below an outer upright post, the connecting plate is connected with the ground through a foundation jack, and a first jacking oil cylinder and a second jacking oil cylinder are connected with an external oil supply device;
b. then starting a first jacking oil cylinder, lifting the gantry to a set height position, supporting the gantry positioning mechanism through a ground jack and a basic jack, starting a second jacking oil cylinder according to the distance between the arc top outer template and the tunnel arc top, and completely attaching the arc top outer template to the inner wall of the tunnel;
c. starting a jack assembly, and supporting the lateral inner template and the lateral outer template through a first lateral jack, a second lateral jack and a third lateral jack to enable the lateral outer template to be completely attached to the inner wall of the tunnel;
d. and finally, carrying out lining construction, and dragging the lining trolley to the outside of the tunnel through traction equipment after the construction is finished.
Priority Applications (1)
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| CN202011569040.XA CN112647976B (en) | 2020-12-26 | 2020-12-26 | Lining trolley for dovetail type large-section tunnel and construction method thereof |
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| CN202011569040.XA CN112647976B (en) | 2020-12-26 | 2020-12-26 | Lining trolley for dovetail type large-section tunnel and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113585736A (en) * | 2021-07-26 | 2021-11-02 | 中铁一局集团(广州)建设工程有限公司 | Cast-in-place case roof beam integral sliding type side form with adjustable it is multidirectional |
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