CN115405334A - Construction method for on-site forming of central ditch of highway tunnel - Google Patents
Construction method for on-site forming of central ditch of highway tunnel Download PDFInfo
- Publication number
- CN115405334A CN115405334A CN202211294403.2A CN202211294403A CN115405334A CN 115405334 A CN115405334 A CN 115405334A CN 202211294403 A CN202211294403 A CN 202211294403A CN 115405334 A CN115405334 A CN 115405334A
- Authority
- CN
- China
- Prior art keywords
- central ditch
- cover plate
- central
- ditch
- template
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 239000006260 foam Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000012423 maintenance Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 238000002955 isolation Methods 0.000 claims abstract description 7
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 32
- 239000002023 wood Substances 0.000 claims description 19
- 238000000465 moulding Methods 0.000 claims description 8
- 238000009415 formwork Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000009417 prefabrication Methods 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Sewage (AREA)
- Road Paving Structures (AREA)
Abstract
A construction method for on-site forming of a central ditch of a highway tunnel relates to the field of construction of highway tunnels, and specifically comprises the steps of pouring the side wall of the central ditch, manufacturing a central ditch cover plate template, installing a template support assembly, manufacturing and installing a central ditch cover plate steel bar, installing a foam plate, and pouring concrete on the central ditch cover plate, wherein after pouring, isolation protection watering maintenance is carried out, after the central ditch cover plate has strength, the template support assembly is detached, sundries in the central ditch are cleaned, the foam plate at the position of a seam is deducted after cleaning, and mortar is used for filling joints to finish construction; after the method is used, the comprehensive damage rate of the central ditch cover plate can be controlled within 3 percent, the service life of the central ditch cover plate is prolonged, the cost expenditure is reduced, and the construction quality and the overall civilized construction environment in the tunnel are effectively improved.
Description
Technical Field
The invention relates to the field of construction of highway tunnels, in particular to a construction method for on-site forming of a central ditch of a highway tunnel.
Background
It is known that a central gutter of a highway tunnel plays an extremely important role as a drainage channel during tunnel construction and operation. The construction process is organized according to the construction order of invert, packing, ditch lateral wall, ditch apron and implements, and wherein the ditch apron adopts the concrete that is not less than C30, generally all prefabricates in small-size prefabricated component factory, transports to the job site installation through truck-mounted crane etc. but has following problem in the construction process: (1) The side wall of the central ditch is generally 20cm in thickness, the side wall is independently poured after inverted arch filling construction, and the flatness of the filling and the top of the side wall of the ditch is not well controlled, so that gaps appear at the bottom after a ditch cover plate is laid; (2) The ditch cover plate prefabricated by a prefabrication factory is inevitably damaged by collision, edge deletion, corner drop and the like in the transportation and installation processes; (3) The corner of the mounted ditch cover plate is damaged in a large area after being rolled by a heavy vehicle due to the influences of prefabrication errors, mounting errors, the top of the side wall of the ditch, the height of the filled surface and the like, the corner damage rate of the mounted ditch cover plate can reach 20% through statistics, and the replacement rate in the later period is high; therefore, the construction method for on-site forming of the central ditch of the highway tunnel, which effectively closes the central ditch cover plate and the side wall of the ditch and reduces the breakage rate of the central ditch cover plate, is provided, and becomes a basic appeal for technical personnel in the field.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a construction method for on-site forming of a central ditch of a highway tunnel.
In order to realize the purpose, the invention adopts the following technical scheme:
a construction method for on-site forming of a central ditch of a highway tunnel specifically comprises the following steps:
(1) Pouring the side wall of the central ditch:
after filling and pouring the inverted arch, roughening the contact surface between the side wall of the central ditch and the filling of the inverted arch, removing impurities after roughening, washing the contact surface, installing a side wall template of the central ditch, and pouring concrete on the side wall of the central ditch;
(2) And manufacturing a central ditch cover plate template:
the bottom die of the central ditch cover plate is a special bridge template, the thickness of the bottom die is 14-20 mm, and the processing quantity in the width direction is planned on the whole bottom die of the central ditch cover plate according to the width of the central ditch body, so that the width of the bottom die is as wide as that of the central ditch body;
(3) And installing a template supporting component:
a. cleaning the bottom surface of a central ditch, ensuring that the bottom of the central ditch is flat, installing a plurality of vertical supporting steel pipes at intervals of 1.2-1.5 m in the longitudinal direction, fixing the bottoms of the vertical supporting steel pipes on channel steel, installing reinforcing supports in the horizontal direction between every two adjacent vertical supporting steel pipes in the cross section direction and the longitudinal section direction of the central ditch, wherein both ends of each reinforcing support are in a ring shape, fixing hooks are arranged at the upper part and the lower part of each vertical supporting steel pipe, and an oblique reinforcing support is arranged between every two adjacent vertical supporting steel pipes in the longitudinal section direction; the two ends of the horizontal reinforcing support and the two ends of the oblique reinforcing support are connected through a fixed hook, each vertical supporting steel pipe is fixed through a reinforcing support along the cross section and the longitudinal section, jacking supports are mounted at the tops of the vertical supporting steel pipes, the height of each jacking support is roughly adjusted according to the height of the side wall of the central ditch in the mounting process, and the top of each jacking support is ensured to be basically horizontal to the top of the side wall of the ditch;
b. transverse secondary corrugated steel pipes are placed at the tops of every two vertical supporting steel pipes along the cross section direction of the central ditch, the length of each transverse secondary corrugated steel pipe is not larger than the width of the central ditch, wood boards are sequentially laid along the cross section direction of the central ditch, the length direction of each wood board is longitudinally consistent with that of the central ditch, and the jacking supports are finely adjusted in the laying process to ensure that the laid wood boards are horizontal;
c. laying a processed special bridge template above the laid wood boards to serve as a bottom template of the central ditch cover plate, wherein the elevation of the whole template support assembly is consistent with that of the top of the side wall of the central ditch after the whole template support assembly is installed;
(4) Manufacturing and installing the central ditch cover plate steel bar:
the central ditch cover plate reinforcing steel bars are manufactured in a slicing mode, concrete cushion blocks are uniformly arranged on a bottom die of the laid central ditch cover plate, the spacing between the concrete cushion blocks is arranged in a quincunx mode according to 0.8m x 0.8m, the cover plate reinforcing steel mesh is guaranteed to have enough protective layer thickness, meanwhile, every 5 central ditch cover plates are arranged, and two omega-shaped lifting hooks are arranged on the sixth central ditch cover plate along the length direction;
(5) And installing the foam board:
installing a transverse foam board with the thickness of 10mm at intervals of 1.2m along the longitudinal direction, wherein the thickness of the foam board is consistent with that of the central ditch cover plate, and installing the foam board with the thickness of 10mm along the through length of the central ditch cover plate and the filling contact edge, wherein the thickness of the foam board is consistent with that of the central ditch cover plate;
(6) Concrete placement is carried out to central ditch apron, carries out the maintenance of isolation protection watering after the pouring, treats that central ditch apron has intensity back, demolishs template supporting component, clears up the debris in the central ditch, deducts the cystosepiment of seam position after the clearance, adopt the mortar to joint a seam can.
According to the construction method for on-site forming of the central ditch of the highway tunnel, the side wall concrete of the ditch is uniformly vibrated by the inserted vibrating rods in the pouring process, and the vibrating rods are far away from the side wall formwork of the ditch.
The construction method for the on-site forming of the central ditch of the highway tunnel comprises the following steps of enabling the length of a vertical supporting steel pipe to be = the height of a ditch body of the central ditch, enabling the height of a jacking to be exposed, enabling the thickness of a wood board to be equal to the thickness of a transverse secondary corrugated steel pipe, wherein the exposed length of the jacking is 10-15 cm, the thickness of the wood board is 50mm, and the pipe diameter of the transverse secondary corrugated steel pipe is phi 42mm.
According to the construction method for on-site forming of the central ditch of the highway tunnel, the bottom stress surface of the vertical supporting steel pipe is a plane, and the length of the channel steel is 80mm.
The construction method for on-site forming of the central ditch of the highway tunnel comprises the steps that the reinforcing support is round steel with the diameter of 16mm, and the height of a fixed hook at the two ends of the horizontal reinforcing support from the ground is 70-90 mm.
In the construction method for on-site molding of the central ditch of the highway tunnel, in the step (6), when concrete is poured on the central ditch cover plate, an inserted vibrating rod is adopted for micro-vibration, a layer with the thickness of 100mm is poured firstly, the concrete is poured from the middle to the periphery of the central ditch cover plate, the foam plate is reinforced, stabilized and positioned by the concrete, then the foam plate is gradually fully poured, and finally the surface of the central ditch cover plate is closed by the plastering plate, so that the height of the central ditch cover plate is ensured to be consistent with the height of the filling surface of the inverted arch.
The construction method for on-site forming of the central ditch of the highway tunnel comprises the following operation steps of isolation protection watering maintenance in step (6): the column plastic warning column with the height of 80mm is installed at the position 50mm away from the two sides of the central ditch cover plate, the column height is 60cm, the poured and formed central ditch cover plate is protected to prevent rolling, and meanwhile, watering maintenance is carried out.
The construction method for on-site forming of the central ditch of the highway tunnel comprises the following steps of (6) removing the template support assembly: after the strength of the central ditch cover plate reaches 50% of the designed strength, the reinforcing supports are unfastened one by one from the lower part, all parts of the formwork support assembly are dismantled one by one, and the construction is transferred to the next section of construction.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the construction method for on-site forming of the central ditch of the highway tunnel, the central ditch cover plate is cast in situ, so that prefabrication procedures of a prefabrication factory are reduced, temporary land occupation of the prefabrication factory is reduced, land resources are saved, the template support assembly is detachably mounted, the on-site casting of the central ditch cover plate is realized, the top elevation of the central ditch cover plate can be effectively ensured to be consistent with the elevation of the filling top surface, the whole driving surface is ensured to be at the same elevation, the central ditch cover plate and the side wall of the ditch are effectively closed, and gaps are reduced;
according to the construction method for on-site forming of the central ditch of the highway tunnel, the foam board is adopted for dividing the central ditch cover plates, and the lifting hooks are embedded at intervals, so that the maintenance of the central ditch cover plates in the later period and the cleaning of sundries in the central ditch are facilitated; after the method is used, the comprehensive breakage rate of the central ditch cover plate can be controlled within 3 percent, the service life of the central ditch cover plate is prolonged, the cost expenditure is reduced, and the construction quality and the overall civilized construction environment in the tunnel are effectively improved.
Drawings
FIG. 1 is a structural schematic view of a cross-section of a central raceway structure.
Fig. 2 is a structural view showing a cross section of the center gutter module support assembly according to the present invention.
Fig. 3 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 2.
In the figure: 1. filling an inverted arch; 2. a central gutter bottom plate; 3. a central gutter cover plate; 4. a central ditch; 5. a central gutter sidewall; 6. a concrete pad; 7. a hook; 8. cover plate steel bar net sheets; 9. a foam board; 10. a central ditch cover plate bottom die; 11. a wood board; 12. fixing the hook; 13. channel steel; 14. reinforcing and supporting; 15. vertically supporting the steel pipe; 16. jacking; 17. and a horizontally inferior corrugated steel pipe.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
The construction method for on-site forming of the central ditch of the highway tunnel, which is combined with the attached drawings 1-3, comprises the following steps:
(1) Pouring the side wall of the central ditch:
after filling and pouring the inverted arch, chiseling the contact surface of the side wall 5 of the central ditch and the filling 1 of the inverted arch, removing impurities after chiseling, washing the contact surface, installing a side wall template of the central ditch, and pouring concrete on the side wall of the central ditch; in the process of pouring concrete on the side wall of the ditch, an inserted vibrating rod is adopted for uniformly vibrating, and the vibrating is far away from a template on the side wall of the ditch;
(2) And manufacturing a central ditch cover plate template:
the central ditch cover plate bottom die 10 adopts a special bridge template, the thickness is 14-20 mm, and the processing quantity in the width direction is planned on the whole central ditch cover plate bottom die 10 according to the width of the ditch body of the central ditch 4, so that the width of the central ditch cover plate bottom die is as wide as the ditch body of the central ditch 4;
(3) And installing a template supporting component:
a. cleaning the bottom surface of a central ditch 4, ensuring that the bottom of the central ditch 4 is flat, installing a plurality of vertical supporting steel pipes 15 at intervals of 1.2-1.5 m in the longitudinal direction, fixing the bottoms of the vertical supporting steel pipes 15 on channel steel 13, installing horizontal reinforcing supports 14 between every two adjacent vertical supporting steel pipes 15 along the cross section direction and the longitudinal section direction of the central ditch 4, wherein both ends of each reinforcing support 14 are circular, fixing hooks 12 are arranged at the upper part and the lower part of each vertical supporting steel pipe 15, an oblique reinforcing support 14 is arranged between every two adjacent vertical supporting steel pipes 15 in the longitudinal section direction, and the oblique reinforcing supports 14 play a reinforcing role; the horizontal direction reinforcing support 14 and the two ends of the oblique reinforcing support 14 are connected through a fixed hook 12, each vertical supporting steel pipe 15 is fixed through the reinforcing support 14 along the cross section and the longitudinal section, a jacking 16 is installed at the top of each vertical supporting steel pipe 15, the height of the jacking 16 is roughly adjusted according to the height of the side wall of the central ditch 4 in the installation process, and the top of the jacking 16 is ensured to be basically horizontal to the top of the side wall of the ditch;
the bottom stress surface of the vertical supporting steel pipe 15 is a plane, and the length of the channel steel 13 is 80mm; the length of the vertical supporting steel pipe 15 = the height of the central ditch 4, the exposed length of the jacking 16, the thickness of the wood board 11 and the thickness of the transverse secondary corrugated steel pipe 17, wherein the exposed length of the jacking 16 is 10-15 cm, the thickness of the wood board 11 is 50mm, and the pipe diameter of the transverse secondary corrugated steel pipe 17 is phi 42mm; the reinforcing support 14 is round steel with the diameter of 16mm, the height of the fixed hooks 12 at the two ends of the horizontal reinforcing support 14 from the ground is 70-90, and the installation mode and the number of the reinforcing supports can be adjusted according to actual conditions due to the fact that the concrete of the central ditch cover plate is small in overall size and limited in stress area;
b. transverse secondary corrugated steel pipes 17 are arranged at the tops of every two vertical supporting steel pipes 15 along the cross section direction of the central ditch 4, the length of each transverse secondary corrugated steel pipe 17 is not larger than the width of the central ditch 4, 50 mm-thick wood boards 11 are sequentially laid along the cross section direction of the central ditch 4, the length direction of each wood board 11 is longitudinally consistent with that of the central ditch 4, and a jacking 16 is finely adjusted in the laying process to ensure that the laid wood boards 11 are horizontal;
c. laying a processed special bridge template above the wood board 11 to serve as a bottom template 10 of the central ditch cover plate, wherein the elevation of the whole template support assembly is consistent with that of the top of the side wall of the central ditch after the installation is finished;
(4) Manufacturing and installing the central ditch cover plate steel bar:
the central ditch cover plate steel bars are manufactured in a slicing mode, the slicing length is beneficial to carrying in the later-stage central ditch maintenance, concrete cushion blocks 6 are uniformly arranged on a bottom die 10 of the laid central ditch cover plate, the spacing between the concrete cushion blocks is arranged in a quincunx mode according to 0.8m by 0.8m, the cover plate steel bar net piece 8 is guaranteed to have enough protective layer thickness, meanwhile, every 5 central ditch cover plates 3 are arranged, and two omega-shaped lifting hooks 7 are arranged on the sixth central ditch cover plate 3 along the length direction, so that the later-stage central ditch is convenient to clean;
(5) Installation of the foam board 9:
installing one transverse foam board 9 with the thickness of 10mm at intervals of 1.2m along the longitudinal direction, wherein the thickness of the foam board 9 is consistent with that of the central ditch cover plate 3, and installing 10mm foam boards 9 along the through length of the central ditch cover plate 3 and the filling contact edge for two times, and the thickness of the foam boards is consistent with that of the central ditch cover plate 3;
(6) Pouring concrete into the central ditch cover plate 3, performing isolation protection watering maintenance after pouring, removing the template support assembly after the central ditch cover plate 3 has strength, cleaning sundries in the ditch of the central ditch 4, deducting the foam plates 9 at the joint positions after cleaning, and filling joints with mortar;
adopt bayonet vibrating rod micro vibration when carrying out concrete placement to central ditch apron 3, pour the one deck earlier, thickness is 100mm, pours to all around from the centre of central ditch apron 3, strengthens firm location through the concrete to cystosepiment 9, then waters full gradually, receives the face through the plastering plate at last, guarantees that central ditch apron 3 height is unanimous with the invert filling face height.
The operation steps of isolation protection watering and maintenance are as follows: the column-shaped plastic warning column with the height of 80mm is arranged at the position 50mm away from the two sides of the central ditch cover plate 3, the column height is 60cm, the poured and formed central ditch cover plate 3 is protected to prevent rolling, and water is sprayed for maintenance.
The method for removing the formwork support assembly comprises the following steps: after the strength of the central ditch cover plate 3 reaches 50% of the designed strength, the reinforcing supports 14 are unfastened one by one from the lower part, and all parts of the formwork support assembly are dismantled one by one and transferred to the next section of construction.
The present invention is not described in detail in the prior art.
The embodiments chosen for the purpose of disclosure of the invention are presently considered to be suitable, however, it is to be understood that the invention is intended to cover all variations and modifications of the embodiments which fall within the spirit and scope of the invention.
Claims (8)
1. A construction method for on-site forming of a central ditch of a highway tunnel is characterized by comprising the following steps: the method specifically comprises the following steps:
(1) Pouring the side wall of the central ditch:
after filling and pouring the inverted arch, chiseling the contact surface between the side wall of the central ditch and the filling of the inverted arch, removing impurities after chiseling, washing the contact surface, installing a side wall template of the central ditch, and pouring concrete on the side wall of the central ditch;
(2) And manufacturing a central ditch cover plate template:
the bottom die of the central ditch cover plate is a special bridge template, the thickness of the bottom die is 14-20 mm, and the processing quantity in the width direction is planned on the whole bottom die of the central ditch cover plate according to the width of the central ditch body, so that the width of the bottom die is as wide as the width of the central ditch body;
(3) And installing a template supporting component:
a. cleaning the bottom surface of a central ditch, ensuring that the bottom of the central ditch is flat, installing a plurality of vertical supporting steel pipes at intervals of 1.2-1.5 m in the longitudinal direction, fixing the bottoms of the vertical supporting steel pipes on channel steel, installing reinforcing supports in the horizontal direction between every two adjacent vertical supporting steel pipes in the cross section direction and the longitudinal section direction of the central ditch, wherein both ends of each reinforcing support are in a ring shape, fixing hooks are arranged at the upper part and the lower part of each vertical supporting steel pipe, and an oblique reinforcing support is arranged between every two adjacent vertical supporting steel pipes in the longitudinal section direction; the two ends of the horizontal reinforcing support and the two ends of the oblique reinforcing support are connected through a fixed hook, each vertical supporting steel pipe is fixed through a reinforcing support along the cross section and the longitudinal section, jacking supports are mounted at the tops of the vertical supporting steel pipes, the height of each jacking support is roughly adjusted according to the height of the side wall of the central ditch in the mounting process, and the top of each jacking support is ensured to be basically horizontal to the top of the side wall of the ditch;
b. transverse secondary corrugated steel pipes are placed at the tops of every two vertical supporting steel pipes along the cross section direction of the central ditch, the length of each transverse secondary corrugated steel pipe is not larger than the width of the central ditch, wood boards are sequentially laid along the cross section direction of the central ditch, the length direction of each wood board is longitudinally consistent with that of the central ditch, and the jacking supports are finely adjusted in the laying process to ensure the level of the laid wood boards;
c. laying a processed special bridge template above the laid wood boards to serve as a bottom template of the central ditch cover plate, wherein the elevation of the whole template support assembly is consistent with that of the top of the side wall of the central ditch after the whole template support assembly is installed;
(4) Manufacturing and installing the steel bars of the central ditch cover plate:
the central ditch cover plate steel bars are manufactured in a piece-by-piece mode, concrete cushion blocks are uniformly arranged on a bottom die of the laid central ditch cover plate, the spacing between the concrete cushion blocks is arranged in a quincunx mode according to 0.8m x 0.8m, the cover plate steel bar net piece is guaranteed to have enough protective layer thickness, meanwhile, 5 central ditch cover plates are arranged at intervals, and two omega-shaped lifting hooks are arranged on the sixth central ditch cover plate along the length direction;
(5) Installation of the foam board 9:
installing a transverse foam board with the thickness of 10mm at intervals of 1.2m along the longitudinal direction, wherein the thickness of the foam board is consistent with that of the central ditch cover plate, and installing the foam board with the thickness of 10mm along the through length of the central ditch cover plate and the filling contact edge, wherein the thickness of the foam board is consistent with that of the central ditch cover plate;
(6) Concrete placement is carried out to central ditch apron, carries out the maintenance of isolation protection watering after the pouring, treats that central ditch apron has intensity back, demolishs template supporting component, clears up the debris in the central ditch, deducts the cystosepiment of seam position after the clearance, adopt the mortar to joint a seam can.
2. The construction method for on-site molding of the central ditch of the road tunnel according to claim 1, which is characterized in that: and in the process of pouring concrete on the side wall of the ditch, the inserted vibrating rods are adopted to uniformly vibrate, and the vibration is kept away from the side wall template of the ditch.
3. The construction method for on-site molding of the central ditch of the road tunnel as claimed in claim 1, wherein: the length of the vertical supporting steel pipe = the height of the ditch body of the central ditch-the exposed length of the jacking-the thickness of the wood board-the thickness of the transverse secondary corrugated steel pipe, wherein the exposed length of the jacking is 10-15 cm, the thickness of the wood board is 50mm, and the pipe diameter of the transverse secondary corrugated steel pipe is phi 42mm.
4. The construction method for on-site molding of the central ditch of the road tunnel according to claim 1, which is characterized in that: the bottom stress surface of the vertical supporting steel pipe is a plane, and the length of the channel steel is 80mm.
5. The construction method for on-site molding of the central ditch of the road tunnel according to claim 1, which is characterized in that: the reinforcing support is round steel with the diameter of 16mm, and the height of the fixed hooks at the two ends of the horizontal reinforcing support from the ground is 70-90 mm.
6. The construction method for on-site molding of the central ditch of the road tunnel according to claim 1, which is characterized in that: and (6) when concrete is poured on the central ditch cover plate, micro-vibrating by using an inserted vibrating rod, pouring a layer with the thickness of 100mm, pouring from the middle to the periphery of the central ditch cover plate, reinforcing, stabilizing and positioning the foam board through concrete, gradually fully pouring, and finally closing the surface through a plastering board to ensure that the height of the central ditch cover plate is consistent with the height of an inverted arch filling surface.
7. The construction method for on-site molding of the central ditch of the road tunnel according to claim 1, which is characterized in that: the operation steps of the isolation protection watering maintenance in the step (6) are as follows: the column plastic warning column with the height of 80mm is installed at the position 50mm away from the two sides of the central ditch cover plate, the column height is 60cm, the poured and formed central ditch cover plate is protected to prevent rolling, and meanwhile, watering maintenance is carried out.
8. The construction method for on-site molding of the central ditch of the road tunnel according to claim 1, which is characterized in that: the step of removing the formwork support assembly in the step (6) is as follows: after the strength of the central ditch cover plate reaches 50% of the designed strength, the reinforcing supports are loosened one by one from the lower part, all parts of the formwork support assembly are detached one by one, and the construction is transferred to the next section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211294403.2A CN115405334B (en) | 2022-10-21 | 2022-10-21 | Construction method for on-site forming of central ditch of highway tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211294403.2A CN115405334B (en) | 2022-10-21 | 2022-10-21 | Construction method for on-site forming of central ditch of highway tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115405334A true CN115405334A (en) | 2022-11-29 |
| CN115405334B CN115405334B (en) | 2024-06-04 |
Family
ID=84167605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211294403.2A Active CN115405334B (en) | 2022-10-21 | 2022-10-21 | Construction method for on-site forming of central ditch of highway tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115405334B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060089383A (en) * | 2005-02-04 | 2006-08-09 | 태갑성 | Drainage way construction method at tunnel site and it's device |
| JP2010031597A (en) * | 2008-07-31 | 2010-02-12 | Okumura Corp | Invert construction method |
| CN105134253A (en) * | 2015-07-09 | 2015-12-09 | 中铁十二局集团有限公司 | Tunnel inverted arch combined integrated template and method for concreting construction |
| JP2017096069A (en) * | 2015-11-27 | 2017-06-01 | 鹿島建設株式会社 | Tunnel lining concrete construction method and tunnel lining concrete construction structure |
| CN110118093A (en) * | 2019-03-12 | 2019-08-13 | 中交一公局桥隧工程有限公司 | Tunnel ditch cable trough construction method |
| WO2021189746A1 (en) * | 2020-03-26 | 2021-09-30 | 中铁三局集团有限公司 | Rapid construction structure and method for secondary lining of multiple variable-cross-section bored tunnels |
| CN113669082A (en) * | 2021-09-09 | 2021-11-19 | 中铁隧道集团二处有限公司 | Tunnel inverted arch filling construction method containing central ditch |
| CN217151958U (en) * | 2022-01-13 | 2022-08-09 | 中铁八局集团第七工程有限公司 | Tunnel center ditch pouring trolley |
-
2022
- 2022-10-21 CN CN202211294403.2A patent/CN115405334B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060089383A (en) * | 2005-02-04 | 2006-08-09 | 태갑성 | Drainage way construction method at tunnel site and it's device |
| JP2010031597A (en) * | 2008-07-31 | 2010-02-12 | Okumura Corp | Invert construction method |
| CN105134253A (en) * | 2015-07-09 | 2015-12-09 | 中铁十二局集团有限公司 | Tunnel inverted arch combined integrated template and method for concreting construction |
| JP2017096069A (en) * | 2015-11-27 | 2017-06-01 | 鹿島建設株式会社 | Tunnel lining concrete construction method and tunnel lining concrete construction structure |
| CN110118093A (en) * | 2019-03-12 | 2019-08-13 | 中交一公局桥隧工程有限公司 | Tunnel ditch cable trough construction method |
| WO2021189746A1 (en) * | 2020-03-26 | 2021-09-30 | 中铁三局集团有限公司 | Rapid construction structure and method for secondary lining of multiple variable-cross-section bored tunnels |
| CN113669082A (en) * | 2021-09-09 | 2021-11-19 | 中铁隧道集团二处有限公司 | Tunnel inverted arch filling construction method containing central ditch |
| CN217151958U (en) * | 2022-01-13 | 2022-08-09 | 中铁八局集团第七工程有限公司 | Tunnel center ditch pouring trolley |
Non-Patent Citations (1)
| Title |
|---|
| 韦州骞;潘彦邑;杨涛;何扬愿;王翔;: "隧道中心排水沟现浇盖板创新模板施工控制技术", 智能城市, no. 09, 14 May 2020 (2020-05-14) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115405334B (en) | 2024-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108487630B (en) | Concrete sill prefabricated assembly construction method | |
| CN111236254B (en) | Foundation pit supporting structure close to subway and partition construction method | |
| CN102383628A (en) | Construction device and construction method for post-construction decompression cone of silo structure | |
| CN110409244B (en) | Composite bearing prefabricated road slab and prefabricated pavement construction method | |
| CN114482529A (en) | Back-jacking construction method for post-cast strip galvanized steel pipe support frame | |
| JP5124318B2 (en) | Filtration device manufacturing method | |
| CN110700023A (en) | Steel spring floating plate integral ballast bed construction method based on rail engineering | |
| CN111456105B (en) | Construction method of post-pouring belt of underground garage bottom plate | |
| CN117944168A (en) | Beam slab prefabrication construction method | |
| CN110284729A (en) | A kind of historical building wall sectional type cutting disassembling method | |
| CN106884664B (en) | Tunnel inverted arch template and tunnel inverted arch filling rapid construction method | |
| CN105442736A (en) | Anti-floating construction method for cast-in-place concrete hollow floor sectional type combined device | |
| CN115405334A (en) | Construction method for on-site forming of central ditch of highway tunnel | |
| KR101120588B1 (en) | Vertical joint frame for improving monolithic concrete | |
| KR200298104Y1 (en) | Mobile form for forming concrete box on construction work | |
| CN112252197A (en) | Pier column template and pier column construction method | |
| CN217028064U (en) | Post-cast strip galvanized steel pipe support frame | |
| CN214615420U (en) | Manufacturing device for formwork splicing section | |
| CN113059685B (en) | Precast beam construction system and construction method | |
| CN214530768U (en) | Cast-in-place utility tunnel template bearing structure | |
| CN114215092A (en) | Supporting plate overhead pile cap tie beam structure and construction method thereof | |
| CN108978697B (en) | Terrace template system and construction method | |
| KR910007424B1 (en) | Method for construction t - beam on the bridge | |
| CN213732376U (en) | T-beam die | |
| KR100679986B1 (en) | Structure for plastic slab deck system and Downward construction method using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |