CN107120128B - Operation and use method of novel tunnel longitudinal water stop positioning clamp - Google Patents
Operation and use method of novel tunnel longitudinal water stop positioning clamp Download PDFInfo
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- CN107120128B CN107120128B CN201710543761.5A CN201710543761A CN107120128B CN 107120128 B CN107120128 B CN 107120128B CN 201710543761 A CN201710543761 A CN 201710543761A CN 107120128 B CN107120128 B CN 107120128B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 147
- 239000010959 steel Substances 0.000 claims abstract description 147
- 238000010276 construction Methods 0.000 claims abstract description 49
- 238000003466 welding Methods 0.000 claims description 12
- 238000009415 formwork Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000013102 re-test Methods 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
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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 belongs to the technical field of tunnel construction, and discloses an operation and use method of a novel tunnel longitudinal water stop positioning clamp, the operation and use method of the novel tunnel longitudinal water stop positioning clamp comprises the following steps: during construction, the front end and the middle part of the integral inverted arch template are respectively provided with a tightener, and the steel edge water stop is respectively and sequentially clamped and then is tightened; clamping the water stop by using clamps consisting of double longitudinal angle steel of 50mm multiplied by 50mm at two sides of the water stop; during construction, the clamp formed by the angle steel and the hinge type clamping plates can be manually dragged forward to the next working section to be combined with the 'Z' -shaped main beam for construction, and the water stop belt and the inverted arch integral arc mold are connected into a whole. The invention has simple operation, high work efficiency, high rigidity and cost saving.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to an operation and use method of a novel tunnel longitudinal water stop positioning clamp.
Background
In the field of tunnel construction, the construction technology of the water stop is more studied, and the type of field application is more in the form of 'the U-shaped steel bar clamps are utilized manually to longitudinally distribute along the steel edge water stop, the U-shaped steel bar clamps are inserted into a concrete pouring layer for positioning', 'the positioning clamp consisting of a positioning buckle groove plate, a water stop clamping plate and a back-buckle channel steel is manufactured'. After the inverted arch arc-shaped template is installed in place, the buckling groove plate is turned over, the back buckling channel steel and the water stop clamping plate are installed, the water stop positioning clamping plate is screwed down to clamp the longitudinal water stop, and meanwhile, the construction method of adjusting the transverse width and the longitudinal height is carried out, so that the inverted arch arc-shaped template is widely applied to other similar tunnel engineering in China.
The first method is the main stream practice of a plurality of tunnels in China at present, is simple and easy to operate, but the method is difficult to control the longitudinal line shape and the exposed height of the water stop belt, often forms the situations of buckling deformation and the like of the water stop belt, has poor waterproof construction quality, and is eliminated along with the improvement of the national railway construction standard and the innovation technology level.
In the second method, although the concept of effectively fixing the steel edge water stop is integrally connected with the inverted arch form, in the implementation process, the clamp is easy to deform or incline due to touch in the pouring process, and because the positioning clamp is designed to be composed of 1m block units, the clamp needs to be manually lifted to the top of a short side wall across the side wall steel bars during construction and then is installed or detached, the working procedure is complicated, the construction is inconvenient, and the work efficiency is low. In addition, the water stop and the positioning clamp can only realize 'point' fixation, but can not realize 'surface' fixation, and the water stop is pushed by external force in the pouring process and is easy to bend and deform.
In summary, the problems of the prior art are: the existing water stop has poor waterproof construction quality, the clamp is easy to deform or incline, and the work efficiency is low.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides an operation and use method of a novel tunnel longitudinal water stop positioning clamp.
The invention is realized in such a way, and the operation and use method of the novel tunnel longitudinal water stop positioning clamp is used for overcoming the problems of inaccurate positioning of the longitudinal buried water stop or offset, warping and the like caused by impact in the concrete pouring process in the prior various application processes caused by poor control of the inverted arch thickness and the top surface elevation due to errors after the template is installed and the longitudinal water stop positioning clamp is installed in place; the novel tunnel longitudinal water stop positioning clamp provided by the embodiment of the invention is manufactured by using 75mm multiplied by 75mm steel angles with larger rigidity and 50mm steel channels, and the vertical long round holes at the bottom of the steel angle upright of the bracket, the upper cross beam of the bracket and the long round holes of the connecting plate of the positioning clamping plate are subjected to vertical and transverse bolt adjustment, so that the embedded longitudinal water stop is positioned accurately. Meanwhile, due to the design of the 'Y-shaped' support, the integral effective connection with the inverted arch-shaped template is realized, the rigidity is enhanced, the error is reduced, the adverse effect of the mutual interference of the 'Y-shaped' support and the concrete pouring bin vibrating equipment of the clamp is reduced, the quality is ensured, the working procedure time is shortened, and the method has better utilization value in the current tunnel engineering construction.
The operation and use method of the novel tunnel longitudinal water stop positioning clamp comprises the following steps: during construction, the front end and the middle part of the integral inverted arch template are respectively provided with a tightener, and the steel edge water stop is respectively and sequentially clamped and then is tightened; clamping the water stop by using clamps consisting of double angle steel with the length of 50mm multiplied by 50mm at two sides of the water stop; and the water stop belt and the inverted arch integral arc mold are connected into a whole through a plurality of Z-shaped brackets which are welded on the longitudinal angle steel and are arranged at the top of the inverted arch integral arc mold and are fixedly connected through counterpoint bolts.
Further, the operation and use method of the novel tunnel longitudinal water stop positioning clamp specifically comprises the following steps:
firstly, after the inverted arch formwork moves to a construction working surface and is positioned, welding a delta 16mm cross arm steel plate with a length of 20cm in a 'gamma' mode respectively at the middle part and the front end of the top edge of the inverted arch formwork; the north energy multifunctional tightener is respectively fixed on a delta 16mm tightener cross arm plate welded on the inverted arch arc-shaped template; a steel edge water stop belt is connected between the two tighteners. When the device is used, the steel wire rope on the tightener is loosened and fixed on the inverted arch mould cross arm, the wire clamping pliers are used for clamping the water stop belt, then the special wrench is pulled, the steel wire rope is gradually wound on the ratchet wheel roller by utilizing the anti-reversion function of the pawl, so that the water stop belt is tightened, and the tightened water stop belt is fixed on the inverted arch mould cross arm plate;
loosening a wire tightener in the middle of the inverted arch arc-shaped template, gathering a steel wire rope, tightening a steel edge water stop belt by the wire tightener at the front end of the inverted arch, keeping a tightening state, longitudinally positioning a clamp consisting of 2 sections of U-shaped positioning clamping plates with the length of 6.4M and U-shaped positioning angle steel with the length of ┸, manually dragging the end and the middle of the clamp to a working surface by using cables from the end and the middle of the U-shaped positioning clamping plates with the longitudinal positioning angle steel of ┸, finely adjusting the front and back positions of the U-shaped positioning clamping plates with the longitudinal positioning angle steel of ┸, enabling the U-shaped positioning clamping plates welded on the angle steel to correspond to the positions of the U-shaped bracket on the inverted arch arc-shaped template, turning over the U-shaped bracket, screwing 2M 18 bolts at the long round holes at the bottom of the angle steel upright post of the U-shaped bracket, and screwing 2M 18 bolts at the long round holes of the U-shaped positioning clamping plates on the upper cross beam of the U-shaped bracket, and completing rough positioning work of the connection of the clamp and the template bolt;
and thirdly, after the template and the longitudinal water stop positioning clamp are installed in place, measuring personnel further retests the installation plane position and the elevation of the inverted arch arc-shaped template so as to avoid poor control of the inverted arch thickness and the top surface elevation and inaccurate positioning of the middle-longitudinal buried water stop. In order to solve the problem of overlarge installation error of an inverted arch template, the novel tunnel longitudinal water stop positioning clamp provided by the embodiment of the invention uses the two parts of the rectangular hole at the bottom of the angle steel upright post of the bracket of the inverted V-shaped bracket, the upper cross beam of the bracket of the inverted V-shaped bracket and the rectangular hole of the connecting plate of the inverted U-shaped positioning clamping plate to carry out vertical and transverse bolt adjustment, so that the embedded longitudinal water stop is positioned accurately.
After clamping the water stop by using clamps consisting of double longitudinal L50 mm multiplied by 50mm double angle steel at two sides of the water stop, the water stop is ensured to be smooth, flat and straight in line shape and consistent in exposed height. The method comprises the steps of respectively screwing 2M 18 bolts at the bottom oblong holes of the angle steel upright posts of the 'Y-shaped bracket, the upper cross beam of the' Y-shaped bracket and 2M 18 bolts at the oblong holes of the connecting plates of the 'U' -shaped positioning clamping plates, connecting the water stop belt and the inverted arch integral arc mold into a whole and effectively fixing, accurately positioning the pre-buried plane position and the pre-buried height of the longitudinal water stop belt, and meeting the requirement of 20cm of the height outside the water stop belt;
further, the second positioning fixture comprises: the bracket of the Z-shaped bracket for fixing the water stop positioning clamp, the U-shaped positioning clamping plate and the vertical positioning angle steel of the ┸ water stop are formed;
the positioning angle steel consists of two L50 angle steels; the bracket is formed by welding an upper cross beam 1, an angle steel side column 2 and an inclined strut 3, and is connected with a height-adjustable connecting plate welded on the inverted arch arc-shaped template and a slotted hole 4 through an M18 bolt;
further, 2 long round holes with the length of 5cm are formed in the lower end of the Z-shaped main beam and are connected with a welding connection steel plate at the top of the inverted arch template by bolts; the upper end of the main beam is welded with a pin plate which is connected with a hinge type clamping plate by bolts, and 2 long round holes of 7cm are formed in the pin plate;
and the U-shaped hinge clamping plate is welded with the longitudinal double L50 angle steel.
Further, the third step further includes: after the construction of the water stop positioning clamp is completed, the pin joint bolts of the square girder and the hinge type clamping plate can be loosened to separate the square girder from the hinge type clamping plate, one of the bolts at the lower end of the square girder is loosened, and the square girder can be integrally moved to the next section along with the inverted arch template along with the overturning for construction; the clamp formed by the angle steel and the hinge type clamping plate is manually dragged forward to the next working section to be combined with the Z-shaped girder for construction.
The invention has the advantages and positive effects that: after the longitudinal steel edge water stop is tensioned by a tightener and clamped by a clamp consisting of longitudinal double angle steel 50mm multiplied by 50mm, the longitudinal water stop is completely positioned and firmly fixed by connecting a hinge type clamping plate welded on the longitudinal angle steel with a plurality of 'shaped' type brackets arranged at the top of the inverted arch integral arc-shaped template by counterpoint bolts, so that the longitudinal water stop is firmly and stably not deformed when concrete is poured in the inverted arch, the pre-buried plane position and the pre-buried height of the longitudinal water stop are ensured to be accurately positioned, and the waterproof construction quality of a tunnel is improved. Meanwhile, due to the design of the ' Y-shaped ' support, the integral effective connection with the inverted arch-shaped template is realized, the rigidity is enhanced, the error is reduced, the adverse effect of the mutual interference of the clamp ' Y-shaped support and the concrete pouring bin vibrating equipment is reduced, the quality is ensured, the working procedure time is shortened, the working efficiency is high, and the operation is simple and convenient.
Compared with the prior art, the novel tunnel longitudinal water stop positioning clamp is simple and convenient to operate, high in work efficiency, high in rigidity and cost-saving. In the traditional method, a plurality of block sections of the water stop positioning clamp are manually conveyed to a working face and then are installed in place, at least 8 steel reinforcement workers perform positioning and adjustment in the whole process in the construction process, the installation is completed in 3 hours, and the total construction time is about 2 days in each cycle. The clamp formed by the angle steel and the hinge type clamping plate can be manually dragged forward to the next working section to be combined with the 'Z' -shaped main beam for construction, and can be installed and completed only by 4 reinforcing steel bars working for 1 hour, and about 0.4 working days are accumulated in each cycle of construction. Compared with the prior art, the novel positioning clamp for the longitudinal water stop belt of the tunnel has the advantages that working hours are saved per cycle: 2-0.4=1.6 day; the construction economic benefit is considerable.
The invention adopts integral reinforcement, has high construction forming speed and high working efficiency, and compared with the method of casting and correcting by common workers, the invention avoids the quality problems of distortion, irregular size and the like in construction; the rigidity is high, and the influence of external construction environments such as impact, hanging and the like in the construction process is avoided; the standardized construction production is realized, the operation is simple, the installation quality is easy to control, the operation can be implemented by common workers, and the time and labor-consuming fine adjustment measures can be reduced; the labor intensity of workers is greatly reduced, the side wall concrete pouring can be carried out after the positioning fixture is fastened, after construction, the deviation of the longitudinal position of the steel edge water stop belt is less than +/-30 mm, and the construction image is greatly improved.
Drawings
Fig. 1 is a flowchart of an operation and use method of a novel tunnel longitudinal water stop positioning clamp provided by an embodiment of the invention.
Fig. 2 is a schematic structural view of a novel positioning fixture for a longitudinal water stop of a tunnel according to an embodiment of the present invention;
FIG. 3 is a detailed view of the front construction of the water stop fixing clamp plate and the angle steel clamp of 50X 50mm provided by the embodiment of the invention;
FIG. 4 is a detailed view of the side construction of the water stop fixing clamp plate and the master 50X 50mm angle steel clamp provided by the embodiment of the invention;
in the figure: 1. an upper cross beam; 2. angle steel side columns; 3. diagonal bracing; 4. the height-adjustable connecting plate and the oblong hole; 5. a water stop fixing clamp plate and a L50X 50mm angle steel clamp; 6. u-shaped positioning clamping plates; 7. a hinge plate; 8. a clamping plate; 9. equilateral longitudinal positioning angle steel; 10. inverted arch form.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The principle of application of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the operation and use method of the novel tunnel longitudinal water stop positioning fixture provided by the embodiment of the invention comprises the following steps:
s101: when the longitudinal steel edge water stop is pre-buried in the tunnel inverted arch short side wall, the longitudinal water stop is tensioned by using a tightener, so that the buckling and deformation of the middle steel edge during pre-burying and mounting of the water stop are reduced, and the steel edge water stop is relatively straight during pre-burying;
s102: after a clamp formed by longitudinal double angle steel 50mm multiplied by 50mm is used for clamping a longitudinal steel edge water stop, the water stop and the inverted arch integral arc mould are connected into a whole and effectively fixed through a plurality of 'Z' -shaped support alignment bolts which are welded on the longitudinal angle steel and are installed at the top of the inverted arch integral arc mould, and the embedded plane position and the embedded height of the longitudinal water stop are accurately positioned.
As shown in fig. 2, the novel positioning fixture for a longitudinal water stop of a tunnel provided by the embodiment of the invention comprises: the device comprises an upper cross beam 1, angle steel side columns 2, inclined struts 3, a height-adjustable connecting plate, a long round hole 4, a water stop fixing clamp plate, an L50X 50mm angle steel clamp 5, an U-shaped locating clamp plate 6, a hinge plate 7, a clamp plate 8 and equilateral longitudinal locating angle steel 9.
The inverted arch arc-shaped template 10 is provided with a Z-shaped bracket, an inverted U-shaped positioning clamping plate 6 and an equilateral longitudinal positioning angle steel 9 for fixing the water stop positioning clamp.
The bracket is formed by welding an upper cross beam 1, angle steel side columns 2 and inclined struts 3, and is connected with a height-adjustable connecting plate welded on an inverted arch arc-shaped template 10 and a slotted hole 4 through M18 bolts;
the U-shaped positioning clamping plate 6 is formed by welding a water stop fixing clamping plate and a ┸ longitudinal double-L50X 50mm angle steel clamp 5, and is connected with a Z-shaped bracket through an M18 bolt.
Furthermore, the novel tunnel longitudinal water stop positioning clamp is provided with tighteners, the tighteners are respectively arranged at the front end and the middle part of the inverted arch integral template, and the tighteners are respectively fixed on delta 16mm tightener cross arm plates welded on the inverted arch arc-shaped template 10; a steel edge water stop belt is connected between the two tighteners.
Further, double angle steel 50mm multiplied by 50mm is longitudinally arranged on two sides of the steel edge water stop belt.
Further, the upper end welding of angle steel has splint 8, and splint 8 and arc template top are installed the support through the bolt.
Further, the Z-shaped bracket consists of an upper cross beam 1 and an angle steel side column 2, wherein the upper cross beam 1 is a butt buckle [50mm welded into a whole, and a delta 8mm connecting plate connected with a water stop fixing splint and a L50 multiplied by 50mm angle steel clamp is welded at the lower part of the upper cross beam; the upper beam 1 and the equal-side angle steel side columns of 75mm multiplied by 75mm are welded to form a Z-shaped bracket; and a diagonal brace 3 is welded between the upper cross beam 1 and the angle steel side column 2.
The novel tunnel longitudinal water stop positioning clamp is provided with tighteners, and the tighteners are respectively arranged at the front end and the middle part of the inverted arch integral template; a steel edge water stop belt is connected between the two tighteners.
Further, double angle steel with the length of 50mm multiplied by 50mm is longitudinally arranged on two sides of the steel edge water stop belt;
the upper end welding of angle steel has splint, and the support is installed through the bolt at splint and arc template top.
The operation and use method of the novel tunnel longitudinal water stop positioning clamp provided by the embodiment of the invention comprises the following steps:
1. the basic construction flow comprises the following steps: the inverted arch mould moves to a working face to be poured, the longitudinal steel edge water stop is lapped and lengthened, the tightener tightens the steel edge water stop to perform coarse adjustment, the longitudinal positioning angle steel is pushed to the working face (ensuring that the positioning angle steel is lapped on the top surface of the inverted arch concrete for 40-50 cm), the inverted arch girder support is turned and fixed in place, the angle steel positioning clamp plate is pinned with the inverted arch girder bolt, the position of a detection plane and the exposed height are measured, the inverted arch is poured, the angle steel positioning clamp plate and the inverted arch girder bolt are loosened, the inverted arch is detached and pushed to the next working face, the fixing bolt on the longitudinal positioning angle steel clamp plate is loosened, the angle steel clamp is pushed to the next working face, and the next working procedure is constructed.
2. Novel tunnel longitudinal water stop positioning fixture design
The steel edge water stop fine adjustment positioning is performed by a positioning fixture, and the device comprises: the device consists of positioning angle steel, a fixed clamping plate and a Z-shaped main beam, wherein the positioning angle steel consists of two L50 angle steel; the fixed splint is welded into "U" by 2 blocks of 150mm (width) ×250mm (height) ×10mm (thickness), "" type girder adopts [16 channel-section steel butt welding to adopt bolted connection fixed with the inverted arch arc template, the vertical interval 2m of arranging of waterstop positioning fixture.
For the convenience of positioning and fixing the two ends of the 50-layer angle steel, the length of the part of the 50-layer angle steel extending to the poured side wall is 0.5-0.8 m, the part of the 50-layer angle steel effectively closely contacts with the water stop belt of the last section of steel side, and the straightness of the water stop belt is ensured by adopting a steel pin.
The fixing clamp (or clamping plate) is designed to be a prototype and is derived from a steel bar clamp, in order to be convenient for fastening and positioning angle steel, a bolt hole with the diameter of 12mm is formed in the bottom of an angle steel web plate on one side of the fixing clamp (the bolt hole is processed into a screw thread), the bolt is screwed with the angle steel, and the embedded steel plate water stop is firmly fixed.
3. Construction method
(1) Coarse adjustment by tightening water stop belt through tightener
After the inverted arch formwork moves to a construction working surface and is positioned, namely the middle part and the front end of the top edge of the inverted arch formwork are welded with delta 16mm cross arm steel plates with the length of 20 cm; the north energy multifunctional tightener is respectively fixed on a delta 16mm tightener cross arm plate welded on the inverted arch arc-shaped template; a steel edge water stop belt is connected between the two tighteners. When the device is used, the steel wire rope on the tightener is loosened and fixed on the inverted arch mould cross arm, the wire clamping pliers are used for clamping the water stop belt, then the special wrench is pulled, the ratchet drum is gradually wound with the steel wire rope by utilizing the anti-reversion function of the pawl, the water stop belt is tightened, and the tightened water stop belt is fixed on the inverted arch mould cross arm plate.
(2) The inverted U-shaped positioning clamping plate and the ┸ water stop longitudinal positioning angle steel clamp are pushed to the working surface, and the inverted U-shaped bracket is turned over to be in place
Loosening a wire tightener in the middle of an inverted arch arc-shaped formwork and furling a steel wire rope, tightening a steel edge water stop belt by the wire tightener at the front end of the inverted arch, keeping a tightening state, using a clamp consisting of a 2-section 6.4M long inverted U-shaped positioning clamp plate and a ┸ water stop belt longitudinal positioning angle steel, manually dragging the end head and the middle part of the ┸ water stop belt longitudinal positioning angle steel clamp plate to a working surface by using a cable, finely adjusting the front and back positions of the ┸ water stop belt longitudinal positioning angle steel, enabling the inverted U-shaped positioning clamp plate welded on the angle steel to correspond to the position of an inverted arch arc-shaped formwork, turning over the inverted U-shaped bracket, screwing on 2M 18 bolts at the bottom slotted hole of the inverted U-shaped bracket angle steel upright, screwing on 2M 18 bolts at the upper cross beam of the inverted U-shaped bracket and the slotted hole of the inverted U-shaped positioning clamp plate, and completing rough positioning work of the connection of the clamp and the formwork bolts.
(3) Measuring and detecting plane position and elevation of inverted arch template, and fixing exposed height of water stop belt
After the template and the longitudinal water stop positioning clamp are installed in place, the measuring personnel further retests the installation plane position and the elevation of the inverted arch arc-shaped template, so that poor control of the inverted arch thickness and the elevation of the top surface is avoided, and the middle-longitudinal buried water stop is positioned inaccurately. In order to solve the problem of overlarge installation error of an inverted arch template, the novel tunnel longitudinal water stop positioning clamp provided by the embodiment of the invention uses the two parts of the rectangular hole at the bottom of the angle steel upright post of the bracket of the inverted V-shaped bracket, the upper cross beam of the bracket of the inverted V-shaped bracket and the rectangular hole of the connecting plate of the inverted U-shaped positioning clamping plate to carry out vertical and transverse bolt adjustment, so that the embedded longitudinal water stop is positioned accurately.
After clamping the water stop by using clamps consisting of double longitudinal L50 mm multiplied by 50mm double angle steel at two sides of the water stop, the water stop is ensured to be smooth, flat and straight in line shape and consistent in exposed height. The 2M 18 bolts at the long round holes at the bottom of the angle steel upright of the bracket, the 2M 18 bolts at the long round holes of the upper cross beam of the bracket and the connecting plate of the inverted U-shaped locating clamp plate are respectively screwed down, the water stop belt and the inverted arch integral arc mold are connected into a whole and effectively fixed, the embedded plane position and the embedded height of the longitudinal water stop belt are accurately located, and the requirement of 20cm of the height outside the water stop belt is met.
(4) Inverted arch concrete pouring, loosening the tightener, loosening the clamping plates of the ┸ -type angle steel positioning clamp, and completing the whole operation process of the 'Z' -type upper beam bolt and the tightener
The concrete is intensively metered and mixed by a mixing station, the tank truck is transported to the site, the concrete is discharged into a bin by utilizing a chute, layered and segmented multipoint intensive vibration is manually implemented by utilizing a vibrator, and all component devices of the longitudinal water stop positioning clamp are required to be protected from being damaged in the vibration process.
After inverted arch pouring is completed, the clamping plates of the '┸' type angle steel positioning clamp and the connecting bolts of the 'upper cross beam' are loosened and reserved in the tool box, one M18 bolt at the long round hole at the bottom of the angle steel upright of the 'type bracket is removed, then the' type bracket is turned over to avoid inverted arch steel bars, and finally the pawl of the 'north energy multifunctional tightener' is loosened, so that a steel wire rope or galvanized iron wire is loosened, and then the wire clamping pliers are loosened to collect the wire clamping device.
After the concrete strength reaches 80% of the design strength, the inverted arch arc-shaped template is removed, the M18 clamping plate fixing bolts on the inverted U-shaped positioning clamping plate connecting plate are loosened, the ┸ angle steel positioning clamp is manually and gently pried, covered concrete floating paste or sundries are removed, and the whole water stop belt mounting and fixing process is completed.
The novel tunnel longitudinal water stop positioning clamp adopts integral reinforcement, and has high construction forming speed and high working efficiency; compared with a method that common workers perform correction along with pouring, the method has the advantages that quality problems of distortion, irregular size and the like in construction are avoided; the rigidity is high, and the influence of external construction environments such as impact, hanging and the like in the construction process is avoided; the standardized construction production is realized, the operation is simple, the installation quality is easy to control, the operation can be implemented by common workers, and the time and labor-consuming fine adjustment measures can be reduced; the labor intensity of workers is greatly reduced, the side wall concrete pouring can be carried out after the positioning fixture is fastened, after construction, the deviation of the longitudinal position of the steel edge water stop belt is less than +/-30 mm, and the construction image is greatly improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. The operation and use method of the novel tunnel longitudinal water stop positioning clamp is characterized by comprising the following steps of: during construction, the front end and the middle part of the integral inverted arch template are respectively provided with a tightener, and the steel edge water stop is respectively and sequentially clamped and then is tightened; clamping the water stop by using clamps consisting of double angle steel with the length of 50mm multiplied by 50mm at two sides of the water stop; the water stop belt and the inverted arch integral arc mold are connected into a whole through a plurality of Z-shaped brackets which are welded on the longitudinal angle steel and are arranged at the top of the inverted arch integral arc mold and are fixedly connected through counterpoint bolts;
the operation and use method of the novel tunnel longitudinal water stop positioning clamp specifically comprises the following steps:
firstly, after the inverted arch formwork moves to a construction working surface and is positioned, welding a delta 16mm cross arm steel plate with a length of 20cm in a 'gamma' mode respectively at the middle part and the front end of the top edge of the inverted arch formwork; the north energy multifunctional tightener is respectively fixed on a delta 16mm tightener cross arm plate welded on the inverted arch arc-shaped template; a steel edge water stop belt is connected between the two tighteners; when the device is used, the steel wire rope on the tightener is loosened and fixed on the inverted arch mould cross arm, the wire clamping pliers are used for clamping the water stop belt, then the special wrench is pulled, the steel wire rope is gradually wound on the ratchet wheel roller by utilizing the anti-reversion function of the pawl, so that the water stop belt is tightened, and the tightened water stop belt is fixed on the inverted arch mould cross arm plate;
loosening a wire tightener in the middle of the inverted arch arc-shaped template, gathering a steel wire rope, tightening a steel edge water stop belt by the wire tightener at the front end of the inverted arch, keeping a tightening state, longitudinally positioning a clamp consisting of 2 sections of U-shaped positioning clamping plates with the length of 6.4M and U-shaped positioning angle steel with the length of ┸, manually dragging the end and the middle of the clamp to a working surface by using cables from the end and the middle of the U-shaped positioning clamping plates with the longitudinal positioning angle steel of ┸, finely adjusting the front and back positions of the U-shaped positioning clamping plates with the longitudinal positioning angle steel of ┸, enabling the U-shaped positioning clamping plates welded on the angle steel to correspond to the positions of the U-shaped bracket on the inverted arch arc-shaped template, turning over the U-shaped bracket, screwing 2M 18 bolts at the long round holes at the bottom of the angle steel upright post of the U-shaped bracket, and screwing 2M 18 bolts at the long round holes of the U-shaped positioning clamping plates on the upper cross beam of the U-shaped bracket, and completing rough positioning work of the connection of the clamp and the template bolt;
step three, after the template and the longitudinal water stop positioning clamp are installed in place, measuring staff further retests the installation plane position and the elevation of the inverted arch arc-shaped template so as to avoid poor control of the inverted arch thickness and the top surface elevation and inaccurate positioning of the middle-longitudinal buried water stop; after clamping the water stop by using clamps consisting of double longitudinal double angle steels of 50mm multiplied by 50mm on two sides of the water stop, ensuring that the water stop is smooth, flat and straight in line shape and consistent in exposed height, respectively screwing up 2M 18 bolts at the rectangular holes at the bottom of the angle steel upright post of the square bracket, 2M 18 bolts at the rectangular holes of the upper cross beam of the square bracket and the rectangular connecting plate of the inverted U-shaped positioning clamping plate, connecting the water stop and the inverted U-shaped integral arc mold into a whole and effectively fixing, accurately positioning the embedded plane position and the embedded height of the longitudinal water stop, and meeting the requirement of 20cm outside the water stop;
step four, the concrete is intensively metered and mixed by adopting a mixing station, the tank truck is transported to the site, the concrete is discharged into a bin by utilizing a chute, layering, sectioning and multi-point intensive vibration are manually implemented by utilizing a vibrator, and all component devices of a longitudinal water stop positioning clamp are required to be protected from being damaged in the vibration process;
after inverted arch pouring is finished, loosening a clamping plate of a ' ┸ ' angle steel positioning clamp and a connecting bolt of a ' upper cross beam ', reserving the connecting bolt in a tool box, loosening an M18 bolt at a slotted hole at the bottom of an angle steel upright of a ' bracket ', turning over the ' bracket to avoid inverted arch steel bars, loosening a pawl of a ' north energy multifunctional tightener ', loosening a steel wire rope or galvanized iron wire, and loosening a wire clamping pliers to collect the wire clamping device;
after the concrete strength reaches 80% of the design strength, dismantling the inverted arch arc-shaped template, loosening an M18 clamping plate fixing bolt on the inverted U-shaped positioning clamping plate connecting plate, manually lightly prying a ┸ angle steel positioning clamp, removing covered concrete floating paste or sundries, and finishing the whole water stop belt installation and fixing process;
and step two, positioning the fixture, wherein the device comprises: the bracket of the Z-shaped bracket for fixing the water stop positioning clamp, the U-shaped positioning clamping plate and the vertical positioning angle steel of the ┸ water stop are formed;
the positioning angle steel consists of two L50 angle steels; the bracket is formed by welding an upper cross beam (1), angle steel side columns (2) and inclined struts (3), and is connected with a height-adjustable connecting plate welded on the inverted arch-shaped template and a slotted hole (4) through M18 bolts;
the inverted U-shaped positioning clamping plate is formed by welding a water stop fixing clamping plate and a ┸ longitudinal double L-shaped angle steel clamp with the length of 50 multiplied by 50mm, and is connected with a bracket with the inverted U-shaped positioning clamping plate through an M18 bolt;
2 long round holes with the length of 5cm are formed in the lower end of the square bracket, and are connected with a welding connection steel plate at the top of the inverted arch template by bolts; the upper end of the main beam is welded with a pin plate which is connected with a hinge type clamping plate by bolts, and 2 long round holes of 7cm are formed in the pin plate;
and the U-shaped hinge clamping plate is welded with the longitudinal double L50 angle steel.
2. The method for operating the positioning fixture for the longitudinal water stop of the novel tunnel according to claim 1, wherein the third step further comprises: after the construction of the water stop positioning clamp is completed, the pin-joint bolts of the square girder and the hinge type clamp plate can be loosened to separate the square girder from the hinge type clamp plate, one of the bolts at the lower end of the square girder is loosened, then the inverted arch steel bar is avoided by the inverted arch bracket, and finally the pawl of the north energy multifunctional tightener is loosened, and then the square girder can be integrally moved to the next section along with the inverted arch template for construction; the clamp formed by the angle steel and the hinge type clamping plate is manually dragged forward to the next working section to be combined with the Z-shaped girder for construction.
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| CN108150197B (en) * | 2018-02-05 | 2024-04-05 | 中铁隧道集团一处有限公司 | Radial overturning inverted arch trestle of arc-shaped template and mounting, positioning and demolding method thereof |
| CN109026078A (en) * | 2018-07-19 | 2018-12-18 | 中铁十局集团第五工程有限公司 | Tunnel longitudinal direction steel side waterstop movable fixture construction method |
| CN110056372A (en) * | 2019-03-12 | 2019-07-26 | 中交一公局桥隧工程有限公司 | Concreting method in a kind of lining construction |
| CN115961703A (en) * | 2022-12-20 | 2023-04-14 | 北京城建道桥建设集团有限公司 | Longitudinal water stop fastening system and application method thereof |
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