CN113356891B - Tunnel secondary lining formwork trolley end-sealing construction method - Google Patents
Tunnel secondary lining formwork trolley end-sealing construction method Download PDFInfo
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- CN113356891B CN113356891B CN202110811089.XA CN202110811089A CN113356891B CN 113356891 B CN113356891 B CN 113356891B CN 202110811089 A CN202110811089 A CN 202110811089A CN 113356891 B CN113356891 B CN 113356891B
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- inner ring
- air bag
- outer ring
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/381—Setting apparatus or devices
Abstract
The invention discloses a tunnel secondary lining formwork trolley end sealing construction method, which comprises the following steps: firstly, performing secondary lining waterproof construction and moving a secondary lining template trolley in place; secondly, installing an end sealing unit; thirdly, adjusting an inner ring steel mechanism and an air bag template; fourthly, pushing the inner ring steel die mechanism and the positioning top bracing mechanism in place; fifthly, laying a middle-buried water stop; sixthly, overturning the outer ring steel die mechanism; seventhly, pushing out the mold back through supporting mechanism; eighthly, inflating the air bag template; ninth, pouring secondary lining concrete; and tenth, deflating the air bag template and loosening the end sealing unit. According to the invention, the position of the adjustable inner ring steel mechanism is adapted to the conditions of different lining thicknesses, the position of the annular middle-buried waterstop is adopted, the end blocking under the conditions of different lining thicknesses is met through the air bag template, the condition of uneven thickness variation of the lining outer ring caused by uneven primary support injection surface due to artificial construction errors is effectively solved by virtue of the elasticity and plasticity of the air bag template, and the leakage of slurry at the outer edge of the secondary lining end blocking is avoided.
Description
Technical Field
The invention belongs to the technical field of tunnel secondary lining formwork trolley end sealing, and particularly relates to a tunnel secondary lining formwork trolley end sealing construction method.
Background
The secondary lining is a key construction structure in tunnel construction, the manpower and material resources are input most in the whole tunnel construction process, the whole process runs through the tunnel construction, particularly when surrounding rocks on the tunnel face of the tunnel are good and the tunneling is fast, the lining construction is particularly tense, the situation that the distance from the lining end to the tunnel face exceeds the safe step distance and the tunnel face stops to catch up with the constructed lining due to the slow lining construction speed often occurs, and great disadvantages are caused to the construction. The tunnel secondary lining is a mature process at present, factory design and processing field assembly is generally adopted, steel large-scale two-lining template trolley construction is adopted, but the process also has a weak link, namely secondary lining template trolley end sealing, two end sealing modes, namely wood plate end sealing and steel-wood combined end sealing, generally exist in the two modes, and have the conditions of large material waste, labor investment, complex operation, large time consumption, poor water stop installation and forming, slurry leakage and mould running of the end sealing, and the quality common fault is greatly restrained while the lining construction speed is restrained.
The traditional steel-wood combined template end sealing technology comprises the following steps: the inner ring is blocked by a blocking combined steel template, the outer ring is blocked by a wood template in a splicing way, and a lining ring-shaped middle-buried water stop is clamped between the two rings. The following disadvantages exist: (1) the inner ring combined steel template is processed by a steel plate in a factory, and because the weight of field manual assembly and installation is not easy to be overlarge, a single steel template is smaller, when the inner ring combined steel template is constructed, the inner ring combined steel template is connected and fixed with a rib plate at the end of a lining trolley one by one through bolts, a worker is required to pass one by one, assemble one by one and fix one at the end sealing field, a plurality of workers on the field cooperate with manual assembly to process and install, and a large amount of labor force is consumed during construction; (2) due to the technical difference of workers during the construction of the concrete sprayed on the primary support of the tunnel, the problem of uneven surface evenness of the concrete sprayed surface is caused, the circumferential width of the outer ring wood formwork is not uniform, a uniform steel formwork cannot be adopted, only a mode of assembling the wood formwork in site construction can be adopted, a wood board with the width of 10-30cm and the thickness of 4-5cm is adopted in a sealing site, workers are required to measure, saw, pass, assemble and fix one wood board in a one-piece mode under the condition of different lengths, and the wood boards are assembled and installed by manual assembling of a plurality of workers in the site; (3) the inner side of the lining annular buried water stop is fixedly bound and connected with the inner ring combined steel template, the water stop is positioned by processing and installing a steel bar clamp, the reinforcing process is complicated, and the outer side of the lining annular buried water stop is connected with the outer ring wood template in a jacking mode. During construction, the waterstop and the outer ring wood formwork are installed, positioned, reinforced and crossed, the construction operation space of the part except the waterstop is small (the width is 15-30cm), and the installation of the positioning, reinforcing and lining annular middle-buried waterstop needs a large amount of construction time and labor force; (4) the formula waterstop is buried to lining cutting hoop in the design is relative fixed position, be located the intermediate position of lining cutting thickness, and the lining cutting of every tunnel is all along with the change of country rock, there are multiple lining cutting type and thickness, different lining cutting thickness just need adjust the formula waterstop position of burying in the hoop, make it be located the intermediate position of lining cutting thickness all the time, and traditional end-capping technique, inner ring combination steel form is fixed with lining cutting platform truck end rib plate bolted connection, cause and bury formula waterstop rigidity in the lining cutting hoop, single set of inner ring combination steel form, can only satisfy the formula waterstop position requirement of burying in a lining cutting thickness hoop, that is to say, when constructing a tunnel, just need according to this tunnel lining cutting type thickness, the inner ring combination steel form and the outer loop wood formwork of a plurality of models of processing, just can satisfy the construction needs.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a tunnel secondary lining template trolley end-sealing construction method, which adapts to the situation of different lining thicknesses through the position of an adjustable inner ring steel mechanism, buries a water stop belt in a ring direction, meets the end sealing under the situation of different lining thicknesses through an adjustable double-layer air bag template, effectively solves the problem of uneven thickness change of a lining outer ring caused by uneven primary support spraying on the same surface due to artificial errors of construction by virtue of the elasticity and plasticity of the air bag template, avoids slurry leakage of the outer edge of the secondary lining end-sealing, strengthens the end-sealing strength by utilizing a mold back penetrating and supporting mechanism, is flexible, shortens the end-sealing construction time, promotes the construction cycle, improves the lining end-sealing quality and the water stop belt installation quality, solves the problems that the traditional construction mode has more material usage and the time consumption for building and dismantling the end-sealing template is more, the positioning and reinforcing water stop has the problems of complicated work, large working hours, exposed slurry of a template, running of the template, inaccurate embedding of the position of the water stop and the like, and is convenient to popularize and use.
In order to solve the technical problems, the invention adopts the technical scheme that: the tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of:
step one, secondary lining waterproof construction and secondary lining template trolley move in place: finishing the construction of geotextile and waterproof board, and finishing the construction of lining reinforcing steel bars; moving the secondary lining template trolley in place, measuring and controlling the elevation of the trolley and opening the trolley in place;
step two, installing a sealing end unit: the end sealing units are arranged along the annular direction of a trolley rib plate and are positioned and installed one by one from the middle symmetry direction to two ends of a vault, and each end sealing unit comprises an inner ring steel die mechanism, an outer ring steel die mechanism, an air bag template, an adjusting mechanism, a positioning jacking mechanism and a die back penetrating and supporting mechanism, wherein the outer ring steel die mechanism is hinged with the inner ring steel die mechanism and commonly clamps a middle-buried water stop, the air bag template is arranged on the outer ring steel die mechanism, the adjusting mechanism is used for adjusting the telescopic length of the inner ring steel die mechanism, the positioning jacking mechanism is used for jacking the inner ring steel die mechanism, and the die back penetrating and supporting mechanism is used for externally supporting the outer ring steel die mechanism and the air bag template;
step three, adjusting an inner ring steel mechanism and an air bag template: adjusting an inner ring steel mold mechanism and an air bag template up and down according to the lining thickness and the position of the annular buried water stop belt, and controlling the buried water stop belt to be positioned in the middle of the lining thickness;
pushing the inner ring steel die mechanism and the positioning top support mechanism in place;
step five, paving a buried water stop: arranging a middle-buried water stop between the inner ring steel mould mechanism and the outer ring steel mould mechanism, wherein half of the middle-buried water stop enters lining concrete;
step six, turning over an outer ring steel die mechanism: turning over the outer ring steel mold mechanism to enable the inner ring steel mold mechanism and the outer ring steel mold mechanism to clamp the buried water stop belt;
seventhly, pushing out the mold back penetrating and supporting mechanism: pushing out a die back penetrating and supporting mechanism according to the determined height of the air bag template, and fixing the inner ring steel die mechanism, the outer ring steel die mechanism and the air bag template into a whole;
step eight, inflating the airbag template: inflating the air bag template, and tightly pressing the interface of the inflated air bag template and the outer waterproof board to avoid slurry leakage at the periphery of the sealing end;
step nine, pouring secondary lining concrete;
step ten, air relief of the air bag template and a relaxation end sealing unit: after the secondary lining concrete is solidified to reach the strength standard, the air bag template is deflated, then the mold back penetrating and supporting mechanism is retracted, the outer ring steel mold mechanism and the air bag template are turned outwards, the inner ring steel mold mechanism and the positioning and supporting mechanism are retracted, the inner ring steel mold mechanism rotates to be separated from the lining concrete end, and the end-capping unit is in a standby working state.
The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of: the inner ring steel mechanism comprises an inner ring front plate attached to a trolley rib plate and an inner ring back plate arranged in parallel with the inner ring front plate, the tops of the inner ring front plate and the inner ring back plate are connected through an inner ring top plate, the bottoms of the inner ring front plate and the inner ring back plate are connected through a plurality of rib plates, rubber grout stopping strips are arranged at the two ends of the inner ring front plate along the annular direction of the trolley rib plate, and inner ring ear plates are arranged on the inner ring back plate.
The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of: the outer loop steel mould mechanism includes the outer loop steel sheet of U-shaped structure, the antetheca of outer loop steel sheet is provided with a plurality of outer loop tongue and grooves outward, the outer loop backplate of outer loop steel sheet is installed outward and is articulated outer loop hinge ear with the inner ring otic placode, and half of the formula waterstop of burying in sets up between outer loop steel sheet bottom and inner ring roof, and half of the formula waterstop of burying in stretches into to the lining cutting concrete towards the platform truck panel direction in.
The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of: the air bag template comprises an inner ring air bag arranged in the outer ring steel plate and an outer ring air bag arranged on the outer side of the inner ring air bag, an inner ring air bag inflating nozzle of the inner ring air bag penetrates through the outer ring back plate, and the inner ring air bag inflating nozzle and the outer ring air bag inflating nozzle are both connected with an inflating and deflating device.
The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of: the utility model discloses a lead screw is adjusted to inner ring, be provided with first ear seat on the inner ring front bezel, be provided with the second ear seat on the platform truck floor, adjustment mechanism includes that lead screw, inner ring adjust down lead screw and inner ring adjusting sleeve in the inner ring adjusts, and the one end of lead screw is articulated with first ear seat in the inner ring adjusts, and the one end of lead screw is articulated with the second ear seat under the inner ring adjusts, and the other end of lead screw and inner ring adjusting sleeve's one end screw-thread fit are adjusted to the inner ring to the other end of lead screw, and the other end of lead screw and inner ring adjusting sleeve's other end screw-thread fit are adjusted to the outer loop.
The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of: the mould back of the body wears to prop the mechanism including setting up the inner ring bolt cover on the inner ring backplate, setting up the outer loop bolt cover on the outer loop backplate and articulate including the ring bolt cover and wear to prop outward and wear out the mould back of the body of outer loop bolt cover, the mould back of the body wears to prop outward and is provided with the mould back of the body and wears to prop inward branch, inner ring bolt cover, outer loop bolt cover, mould back of the body wear to prop outward and prop inward branch with the mould back of the body and all set up with wear to prop location safety catch complex keyhole.
The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of: the upper end and the lower end of the outer support are provided with outer support clamping edges which are matched with the outer edge of the inner ring bolt sleeve in a clamping mode.
The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of: the number of the die back penetrating and supporting mechanisms is multiple.
The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of: the outer loop bolt cover is provided with the location support and goes up the ear seat outward, is provided with the base steelframe on the platform truck floor, and the one end that the platform truck floor was kept away from to the base steelframe is provided with the location support ear seat down, location shore mechanism includes lead screw, location support lead screw and location support sleeve down in the location support, and the one end of lead screw is articulated with location support ear seat on the location support, and the one end of lead screw is articulated with location support ear seat down under the location support, and the other end of lead screw and location support sleeve's one end screw-thread fit on the location support, the other end of lead screw and location support sleeve's other end screw-thread fit under the location support, and location support sleeve overcoat is equipped with the hand wheel.
The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of: one end of the base steel frame connected with the trolley rib plate is reinforced through a steel frame reinforcing plate.
Compared with the prior art, the invention has the following advantages:
1. the adjustable double-layer air bag template has the advantages that the telescopic length of the inner ring steel die mechanism is adjusted by the adjusting mechanism, the length of the outer die is adjusted by the adjustable double-layer air bag template, the adjustable range is large, the position of the liner annular buried water stop belt can be flexibly adjusted according to different liner thicknesses, and the adjustable double-layer air bag template is convenient to popularize and use.
2. According to the invention, the position of the adjustable inner ring steel mechanism is adapted to the conditions of different lining thicknesses, the position of the annular middle-buried waterstop belt is adapted to the conditions of different lining thicknesses, the end capping under the conditions of different lining thicknesses is met through the adjustable double-layer air bag template, the condition that the thickness of the lining outer ring is not uniform due to uneven primary support spraying surface caused by artificial construction errors is effectively solved by virtue of the elasticity and plasticity of the air bag template, the problem of uneven primary support concrete spraying is sufficiently solved, slurry leakage of the outer edge of the secondary lining end capping is avoided, the reliability and stability are realized, and the using effect is good.
3. The invention has novel and reasonable design, the inner ring steel die mechanism, the outer ring steel die mechanism and the air bag template are reinforced into a whole by utilizing the die back penetrating and supporting mechanism, the lateral pressure of the concrete can be sufficiently met when the lining concrete is poured, the quality is ensured, the labor force and the investment of equipment and machine materials can be saved, the machine is flexible, the end sealing construction time is shortened, the construction cycle is promoted, the lining end sealing quality and the water stop installation quality are improved, the problems of the traditional construction mode that the material use is more, the end sealing template construction and removal consumption time is more, the positioning and reinforcing water stop work is complicated and investment time is more, the template slurry is exposed, the die running is performed, the water stop position embedding is inaccurate and the like are solved, and the popularization and the use are convenient.
In conclusion, the invention has novel and reasonable design, the position of the annular middle-buried waterstop is adapted to the conditions of different lining thicknesses through the position of the adjustable inner ring steel mechanism, the end sealing under the conditions of different lining thicknesses is met through the adjustable double-layer air bag template, the condition that the thickness of the outer ring of the lining is not uniform due to the fact that the primary support injection is uneven on the same surface due to construction human errors is effectively solved by means of the elasticity and plasticity characteristics of the air bag template, the slurry leakage of the outer edge of the end sealing end of the secondary lining is avoided, the end sealing strength is enhanced by utilizing the back of the mould to penetrate through the support mechanism, the flexibility is realized, the end sealing construction time is shortened, the construction cycle is promoted, the end sealing quality of the lining and the waterstop installation quality are improved, the problems that the traditional construction mode has more material use, the construction and the end sealing removal of the template have more time consumption, the positioning and reinforcing waterstop have more work investment time, the template slurry is exposed and the running, the problem of construction quality common faults such as inaccurate embedding of the water stop belt position is convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a capping unit according to the present invention in a standby state.
FIG. 2 is a schematic structural diagram of the pushing in place of the inner ring steel mechanism in the end-capping unit according to the present invention.
Fig. 3 is a schematic structural view of the buried water stop of the end-sealing unit of the present invention after laying.
Fig. 4 is a schematic structural view of pressing down of an outer ring steel die mechanism in the end-sealing unit according to the present invention.
FIG. 5 is a schematic structural view of a back-mold support mechanism in the end-sealing unit of the present invention.
FIG. 6 is a schematic view of the structure of the end-capping unit with the bladder template in place.
FIG. 7 is a block flow diagram of a method of the present invention.
Description of reference numerals:
1-inner ring front plate; 1-2-inner ring top plate; 1-3-rubber grout stopping strips;
1-4-a first ear mount; 1-5-rib plate; 1-6-inner ring back plate;
1-7-inner ring ear plate; 2-1-outer ring steel plate; 2-outer ring tongue and groove;
2-3-outer ring back plate; 2-4-outer ring hinge lug; 3-1-inner ring air bag;
3-2-outer ring air bag; 3-inner ring air bag charging connector; 3-4-outer ring air bag charging connector;
4-1-inner ring adjusting sleeve; 4-2-adjusting an upper screw rod by an inner ring; 4-3-adjusting the lower screw rod by the inner ring;
5-1, positioning and supporting an upper ear seat; 5-2, positioning a support sleeve; 5-3-hand wheel;
5-4, positioning and supporting the lower ear seat; 5-5, positioning and supporting an upper screw rod; 5-6, positioning and supporting the lower screw rod;
6-1-inner ring bolt sleeve; 6-2-outer ring bolt sleeve; 6-3-penetrating and supporting the outer support on the back of the mould;
6-4-external support clamping edge; 6-5 penetrating and supporting a positioning safety plug; 6-keyhole;
6-7, penetrating and supporting the inner support on the back of the mould; 7-trolley panel; 8-trolley rib plates;
9-a second ear mount; 10-base steel frame; 11-steel frame reinforcing plate;
12-buried water stop.
Detailed Description
As shown in fig. 1 to 7, the method for constructing the end closure of the tunnel secondary lining form trolley comprises the following steps:
step one, secondary lining waterproof construction and secondary lining template trolley move in place: finishing the construction of geotextile and waterproof board, and finishing the construction of lining reinforcing steel bars; moving the secondary lining template trolley in place, measuring and controlling the elevation of the trolley and opening the trolley in place;
step two, installing a sealing end unit: the end sealing units are arranged along the annular direction of a trolley rib plate 8 and are positioned and installed one by one from the middle symmetry direction to two ends of a vault, and each end sealing unit comprises an inner ring steel die mechanism, an outer ring steel die mechanism, an air bag template, an adjusting mechanism, a positioning jacking mechanism and a die back penetrating and supporting mechanism, wherein the outer ring steel die mechanism is hinged with the inner ring steel die mechanism and commonly clamps a middle-buried water stop 12, the air bag template is arranged on the outer ring steel die mechanism, the adjusting mechanism is used for adjusting the telescopic length of the inner ring steel die mechanism, the positioning jacking mechanism is used for jacking the inner ring steel die mechanism, and the die back penetrating and supporting mechanism is used for externally supporting the outer ring steel die mechanism and the air bag template;
step three, adjusting an inner ring steel mechanism and an air bag template: adjusting an inner ring steel mechanism and an air bag template up and down according to the lining thickness and the position of the annular middle buried water stop 12, and controlling the middle buried water stop 12 to be positioned in the middle of the lining thickness;
pushing the inner ring steel die mechanism and the positioning top support mechanism in place;
step five, paving a buried water stop: arranging the buried water stop 12 between the inner ring steel mould mechanism and the outer ring steel mould mechanism, and enabling half of the buried water stop 12 to enter lining concrete;
step six, turning over an outer ring steel die mechanism: turning over the outer ring steel mould mechanism to enable the inner ring steel mould mechanism and the outer ring steel mould mechanism to clamp the buried water stop 12;
seventhly, pushing out the mold back penetrating and supporting mechanism: pushing out a die back penetrating and supporting mechanism according to the determined height of the air bag template, and fixing the inner ring steel die mechanism, the outer ring steel die mechanism and the air bag template into a whole;
step eight, inflating the airbag template: inflating the air bag template, and tightly pressing the interface of the inflated air bag template and the outer waterproof board to avoid slurry leakage at the periphery of the sealing end;
step nine, pouring secondary lining concrete;
step ten, air relief of the air bag template and a relaxation end sealing unit: after the secondary lining concrete is solidified to reach the strength standard, the air bag template is deflated, then the mold back penetrating and supporting mechanism is retracted, the outer ring steel mold mechanism and the air bag template are turned outwards, the inner ring steel mold mechanism and the positioning and supporting mechanism are retracted, the inner ring steel mold mechanism rotates to be separated from the lining concrete end, and the end-capping unit is in a standby working state.
The adjustable double-layer air bag template is used for adjusting the length of the outer die, and the length of the inner ring steel die mechanism is adjusted through the adjustable double-layer air bag template; the adjustable inner ring steel mechanism is adapted to the conditions of different lining thicknesses, the position of the annular middle-buried waterstop belt is adapted to the positions of different lining thicknesses, the blocking ends under the conditions of different lining thicknesses are met through the adjustable double-layer air bag template, the condition that the thickness of the lining outer ring is not uniform due to the fact that the primary support is sprayed with the same uneven surface due to construction human errors and the construction outer ring is not uniform is effectively solved, the problem of uneven concrete spraying due to the primary support is enough to be solved, and slurry leakage of the outer edge of the secondary lining blocking end is avoided; utilize the mould back to wear to prop the mechanism and consolidate inner ring steel mould mechanism, outer loop steel mould mechanism and gasbag template as an organic whole, concrete lateral pressure when being enough to deal with lining concrete and pouring, guarantee the quality and also can save the input of labour and equipment machine material, flexible, shorten the end-capping engineering time, promote the construction circulation, improve lining end-capping quality and waterstop installation quality, it has the material to use many to solve traditional construction mode, it consumes man-hour to build and demolish the end-capping template, the complicated input man-hour of location reinforcement waterstop work is many, the template dew thick liquid, the running formwork, the waterstop position buries the general problem of construction quality common faults such as inaccurate.
In the embodiment, the inner ring steel mechanism comprises an inner ring front plate 1-1 attached to a trolley rib plate 8 and an inner ring back plate 1-6 arranged in parallel with the inner ring front plate 1-1, the tops of the inner ring front plate 1-1 and the inner ring back plate 1-6 are connected through an inner ring top plate 1-2, the bottoms of the inner ring front plate 1-1 and the inner ring back plate 1-6 are connected through a plurality of rib plates 1-5, rubber grout stopping strips 1-3 are arranged at two ends of the inner ring front plate 1-1 along the annular direction of the trolley rib plate 8, and inner ring ear plates 1-7 are arranged on the inner ring back plate 1-6.
The inner ring front plate 1-1 is attached to the trolley rib plate 8, so that no gap is formed when the inner ring front plate 1-1 moves along the surface of the trolley rib plate 8, and the inner mold end sealing is prevented from leaking slurry, the rubber slurry stop strips 1-3 are arranged at the two circumferential ends of the inner ring front plate 1-1 along the trolley rib plate 8, so that the slurry is prevented from leaking at the contact matching position of two adjacent end sealing units, the gap between the two adjacent end sealing units is larger as the end sealing units are circumferentially arranged on the trolley rib plate 8 and the inner ring front plate 1-1 can move, the inner ring front plate 1-1 extends out longer, the gap between the two adjacent end sealing units is larger, the gap between the two adjacent end sealing units can be effectively sealed by using the rubber slurry stop strips 1-3 with elastic end parts and the air bag template with elasticity, and the end sealing units are prevented from leaking slurry when being matched and sealed; the inner ring back plates 1-6 provide installation bases for the die back penetrating and supporting mechanism.
In this embodiment, the outer ring steel die mechanism comprises an outer ring steel plate 2-1 with a U-shaped structure, a plurality of outer ring concave-convex grooves 2-2 are arranged outside the front wall of the outer ring steel plate 2-1, an outer ring hinge lug 2-4 hinged to an inner ring ear plate 1-7 is arranged outside an outer ring back plate 2-3 of the outer ring steel plate 2-1, a half of the buried water stop 12 is arranged between the bottom of the outer ring steel plate 2-1 and the inner ring top plate 1-2, and the other half of the buried water stop 12 extends into lining concrete towards the direction of the trolley panel 7.
It should be noted that the outer ring steel plate 2-1 of the U-shaped structure cooperates with the inner ring top plate 1-2 to clamp the buried water stop 12 on one hand, and provides a mounting limit foundation for mounting the air bag template on the other hand, and a plurality of outer ring concave-convex grooves 2-2 are arranged outside the front wall of the outer ring steel plate 2-1 to strengthen the connection between the lining concrete plate and the plate concrete and play a role of the water stop groove.
In the embodiment, the air bag template comprises an inner ring air bag 3-1 arranged in an outer ring steel plate 2-1 and an outer ring air bag 3-2 arranged outside the inner ring air bag 3-1, an inner ring air bag inflating nozzle 3-3 of the inner ring air bag 3-1 penetrates through an outer ring back plate 2-3, and the inner ring air bag inflating nozzle 3-3 and the outer ring air bag inflating nozzle 3-4 are both connected with an inflating and deflating device.
During actual processing and manufacturing, the inner ring air bag 3-1 and the outer ring air bag 3-2 are integrally processed, the inner ring air bag 3-1 and the outer ring air bag 3-2 are respectively provided with independent air storage spaces, the inner ring air bag 3-1 is inflated by the inner ring air bag inflating nozzle 3-3, the outer ring air bag 3-2 is inflated by the outer ring air bag inflating nozzle 3-4, the inner ring air bag 3-1 and the outer ring air bag 3-2 can be simultaneously inflated for use or can be separately inflated for use, when the outer ring air bag 3-2 is inflated for use, the outer ring air bag 3-2 is inflated firstly, the uninflated inner ring air bag 3-1 is extruded into the outer ring steel plate 2-1 of the U-shaped structure by the outer ring steel plate 2-1 of the U-shaped structure, and meanwhile, the outer ring steel plate 2-1 of the U-shaped structure provides a limiting basis for the outer ring air bag 3-2.
In the embodiment, a first lug seat 1-4 is arranged on the inner ring front plate 1-1, a second lug seat 9 is arranged on the trolley rib plate 8, the adjusting mechanism comprises an inner ring adjusting upper screw rod 4-2, an inner ring adjusting lower screw rod 4-3 and an inner ring adjusting sleeve 4-1, one end of the inner ring adjusting upper screw rod 4-2 is hinged with the first lug seat 1-4, one end of the inner ring adjusting lower screw rod 4-3 is hinged with the second lug seat 9, the other end of the inner ring adjusting upper screw rod 4-2 is in threaded fit with one end of the inner ring adjusting sleeve 4-1, and the other end of the outer ring adjusting upper screw rod 4-3 is in threaded fit with the other end of the inner ring adjusting sleeve 4-1.
In the embodiment, the mold back penetrating and supporting mechanism comprises an inner ring bolt sleeve 6-1 arranged on an inner ring back plate 1-6, an outer ring bolt sleeve 6-2 arranged on an outer ring back plate 2-3 and a mold back penetrating and supporting outer support 6-3 hung on the inner ring bolt sleeve 6-1 and penetrating out of the outer ring bolt sleeve 6-2, a mold back penetrating and supporting inner support 6-7 is arranged in the mold back penetrating and supporting outer support 6-3, and bolt holes 6-6 matched with the penetrating and supporting positioning safety bolts 6-5 are respectively formed in the inner ring bolt sleeve 6-1, the outer ring bolt sleeve 6-2, the mold back penetrating and supporting outer support 6-3 and the mold back penetrating and supporting inner support 6-7.
It should be noted that the inner ring back plate 1-6 provides a mounting base for the inner ring back plate 1-6, the outer ring back plate 2-3 provides a mounting base for the outer ring bolt sleeve 6-2, the mold back support outer support 6-3 is hung on the inner ring bolt sleeve 6-1, no connecting piece is needed among the inner ring bolt sleeve 6-1, the outer ring bolt sleeve 6-2 and the mold back support outer support 6-3 in the mold back support mechanism, the structure is simple, the use is flexible, when the mold back support mechanism is not used, the inner ring bolt sleeve 6-1 changes with the state change of the inner ring steel mechanism, and the outer ring bolt sleeve 6-2 changes with the state change of the outer ring steel mechanism; when the mold back penetrating and supporting mechanism is used, the inner ring bolt sleeve 6-1 and the outer ring bolt sleeve 6-2 are aligned up and down to allow the mold back penetrating and supporting outer support 6-3 to penetrate through, the inner ring steel mold mechanism, the outer ring steel mold mechanism and the air bag template are fixed into a whole, and the mold back penetrating and supporting outer support 6-3 is internally provided with a mold back penetrating and supporting inner support 6-7, so that the mold back penetrating and supporting mechanism can be adjusted along with the height change of the air bag template.
In the embodiment, the upper end and the lower end of the mold back penetrating and supporting outer support 6-3 are respectively provided with an outer support clamping edge 6-4 which is in clamping fit with the outer edge of the inner ring bolt sleeve 6-1.
In this embodiment, the number of the mold back support penetrating mechanisms is plural.
In the embodiment, a positioning support upper lug seat 5-1 is arranged outside the outer ring bolt sleeve 6-2, a base steel frame 10 is arranged on the trolley rib plate 8, a positioning support lower lug seat 5-4 is arranged at one end of the base steel frame 10 far away from the trolley rib plate 8, the positioning support mechanism comprises a positioning support upper screw rod 5-5, a positioning support lower screw rod 5-6 and a positioning support sleeve 5-2, one end of the positioning support upper screw rod 5-5 is hinged with the positioning support upper lug seat 5-1, one end of the positioning support lower screw rod 5-6 is hinged with the positioning support lower lug seat 5-4, the other end of the positioning support upper screw rod 5-5 is in threaded fit with one end of the positioning support sleeve 5-2, the other end of the positioning support lower screw rod 5-6 is in threaded fit with the other end of the positioning support sleeve 5-2, a hand wheel 5-3 is sleeved outside the positioning support sleeve 5-2.
In this embodiment, the end of the base steel frame 10 connected to the bogie rib plate 8 is reinforced by a steel frame reinforcing plate 11.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. The tunnel secondary lining formwork trolley end-sealing construction method is characterized by comprising the following steps of:
step one, secondary lining waterproof construction and secondary lining template trolley move in place: finishing the construction of geotextile and waterproof board, and finishing the construction of lining reinforcing steel bars; moving the secondary lining template trolley in place, measuring and controlling the elevation of the trolley and opening the trolley in place;
step two, installing a sealing end unit: the end sealing units are arranged along the annular direction of a trolley rib plate (8) and are positioned and installed one by one from the middle symmetry of an arch crown to two ends, each end sealing unit comprises an inner ring steel die mechanism, an outer ring steel die mechanism which is hinged with the inner ring steel die mechanism and clamps a buried water stop (12) together, an air bag template arranged on the outer ring steel die mechanism, an adjusting mechanism for adjusting the telescopic length of the inner ring steel die mechanism, a positioning jacking mechanism for jacking the inner ring steel die mechanism and a die back penetrating and supporting mechanism for externally supporting the outer ring steel die mechanism and the air bag template;
step three, adjusting an inner ring steel mechanism and an air bag template: adjusting an inner ring steel mechanism and an air bag template up and down according to the lining thickness and the position of the annular middle buried water stop (12), and controlling the middle buried water stop (12) to be positioned in the middle of the lining thickness;
pushing the inner ring steel die mechanism and the positioning top support mechanism in place;
step five, paving a buried water stop: arranging the buried water stop (12) between the inner ring steel mould mechanism and the outer ring steel mould mechanism, and enabling half of the buried water stop (12) to enter lining concrete;
step six, turning over an outer ring steel die mechanism: turning over the outer ring steel mould mechanism to enable the inner ring steel mould mechanism and the outer ring steel mould mechanism to clamp the buried water stop (12);
seventhly, pushing out the mold back penetrating and supporting mechanism: pushing out a die back penetrating and supporting mechanism according to the determined height of the air bag template, and fixing the inner ring steel die mechanism, the outer ring steel die mechanism and the air bag template into a whole;
step eight, inflating the airbag template: inflating the air bag template, and tightly pressing the interface of the inflated air bag template and the outer waterproof board to avoid slurry leakage at the periphery of the sealing end;
step nine, pouring secondary lining concrete;
step ten, air relief of the air bag template and a relaxation end sealing unit: after the secondary lining concrete is solidified to reach the strength standard, deflating the air bag template, then withdrawing the mold back penetrating and supporting mechanism, turning the outer ring steel mold mechanism and the air bag template outwards, withdrawing the inner ring steel mold mechanism and the positioning and supporting mechanism, rotating the inner ring steel mold mechanism to separate from the lining concrete end, and keeping the end-capping unit in a standby working state;
the inner ring steel mechanism comprises an inner ring front plate (1-1) attached to a trolley rib plate (8) and an inner ring back plate (1-6) arranged in parallel with the inner ring front plate (1-1), the tops of the inner ring front plate (1-1) and the inner ring back plate (1-6) are connected through an inner ring top plate (1-2), the bottoms of the inner ring front plate (1-1) and the inner ring back plate (1-6) are connected through a plurality of rib plates (1-5), rubber grout stopping strips (1-3) are arranged at two circumferential ends of the inner ring front plate (1-1) along the trolley rib plate (8), and inner ring ear plates (1-7) are arranged on the inner ring back plate (1-6);
the outer ring steel die mechanism comprises an outer ring steel plate (2-1) with a U-shaped structure, a plurality of outer ring concave-convex grooves (2-2) are formed in the front wall of the outer ring steel plate (2-1), outer ring hinge lugs (2-4) hinged with inner ring lug plates (1-7) are mounted outside an outer ring back plate (2-3) of the outer ring steel plate (2-1), one half of a buried water stop belt (12) is arranged between the bottom of the outer ring steel plate (2-1) and the inner ring top plate (1-2), and the other half of the buried water stop belt (12) extends into lining concrete towards the direction of a trolley panel (7);
the air bag template comprises an inner ring air bag (3-1) arranged in an outer ring steel plate (2-1) and an outer ring air bag (3-2) arranged on the outer side of the inner ring air bag (3-1), an inner ring air bag inflating nozzle (3-3) of the inner ring air bag (3-1) penetrates through an outer ring back plate (2-3), and the inner ring air bag inflating nozzle (3-3) and the outer ring air bag inflating nozzle (3-4) are both connected with an air charging and discharging device;
the mold back penetrating and supporting mechanism comprises an inner ring bolt sleeve (6-1) arranged on an inner ring back plate (1-6), an outer ring bolt sleeve (6-2) arranged on an outer ring back plate (2-3) and a mold back penetrating and supporting outer support (6-3) hung on the inner ring bolt sleeve (6-1) and penetrating out of the outer ring bolt sleeve (6-2), wherein a mold back penetrating and supporting inner support (6-7) is arranged in the mold back penetrating and supporting outer support (6-3), and bolt holes (6-6) matched with penetrating and supporting positioning safety bolts (6-5) are formed in the inner ring bolt sleeve (6-1), the outer ring bolt sleeve (6-2), the mold back penetrating and supporting outer support (6-3) and the mold back penetrating and supporting inner support (6-7).
2. The tunnel secondary lining formwork trolley end-sealing construction method according to claim 1, characterized in that: the inner ring front plate (1-1) is provided with a first ear seat (1-4), a trolley rib plate (8) is provided with a second ear seat (9), the adjusting mechanism comprises an inner ring adjusting upper screw rod (4-2), an inner ring adjusting lower screw rod (4-3) and an inner ring adjusting sleeve (4-1), one end of the inner ring adjusting upper screw rod (4-2) is hinged with the first ear seat (1-4), one end of the inner ring adjusting lower screw rod (4-3) is hinged with the second ear seat (9), the other end of the inner ring adjusting upper screw rod (4-2) is in threaded fit with one end of the inner ring adjusting sleeve (4-1), and the other end of the outer ring adjusting upper screw rod (4-3) is in threaded fit with the other end of the inner ring adjusting sleeve (4-1).
3. The tunnel secondary lining formwork trolley end-sealing construction method according to claim 1, characterized in that: the upper end and the lower end of the mold back penetrating and supporting outer support (6-3) are respectively provided with an outer support clamping edge (6-4) which is in clamping fit with the outer edge of the inner ring bolt sleeve (6-1).
4. The tunnel secondary lining formwork trolley end-sealing construction method according to claim 1, characterized in that: the number of the die back penetrating and supporting mechanisms is multiple.
5. The tunnel secondary lining formwork trolley end-sealing construction method according to claim 1, characterized in that: a positioning support upper lug seat (5-1) is arranged outside the outer ring bolt sleeve (6-2), a base steel frame (10) is arranged on the trolley rib plate (8), a positioning support lower lug seat (5-4) is arranged at one end, far away from the trolley rib plate (8), of the base steel frame (10), the positioning support upper lug seat comprises a positioning support upper screw rod (5-5), a positioning support lower screw rod (5-6) and a positioning support sleeve (5-2), one end of the positioning support upper screw rod (5-5) is hinged with the positioning support upper lug seat (5-1), one end of the positioning support lower screw rod (5-6) is hinged with the positioning support lower lug seat (5-4), the other end of the positioning support upper screw rod (5-5) is in threaded fit with one end of the positioning support sleeve (5-2), and the other end of the positioning support lower screw rod (5-6) is in threaded fit with the other end of the positioning support sleeve (5-2) The positioning support sleeve (5-2) is sleeved with a hand wheel (5-3) in a matching way.
6. The tunnel secondary lining formwork trolley end-sealing construction method according to claim 5, characterized in that: one end of the base steel frame (10) connected with the trolley rib plate (8) is reinforced through a steel frame reinforcing plate (11).
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