Active highway tunnel disease comprehensive treatment structure and construction method
Technical Field
The invention relates to an active highway tunnel disease comprehensive treatment structure and a construction method, belongs to the field of tunnel engineering, and is suitable for treatment construction of diseases occurring in active highway tunnels, in particular to treatment construction of particularly serious sections of the active highway tunnels.
Background
In recent years, the construction scale of traffic infrastructure is continuously enlarged in China, and the construction of highways and railways is rapidly developed. In western plateau mountain areas, the proportion of the number of highway tunnels and the total mileage of a route is higher and higher for improving the line type and reducing the longitudinal slope so as to ensure the safety, comfort and quickness of driving. China is the country with the most tunnel projects and the fastest development in the world at present, and is in the period of rapid development of tunnel project construction.
The main part of tunnel is artifical underground structure, is in the environment of natural medium, because the influence of construction quality and occurrence environment, the tunnel is at the operation in-process, inevitably can appear like diseases such as percolating water, lining crack loss, air pollution in the hole. The diseases can threaten the driving safety in the tunnel, influence the traffic quality and shorten the maintenance period and the service life of the highway tunnel, statistical data analysis of 5000 built railway tunnels shows that the tunnel has the problems of lining cracks, deformation, water leakage and the like to different degrees, and the tunnel accounting for about 1/3 has the diseases of lining structure cracks, water leakage and the like. The adoption of the comprehensive treatment structure and the construction method for the diseases of the existing highway tunnel is an effective measure for solving the problem.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an active road tunnel disease comprehensive treatment structure and a construction method.
The comprehensive treatment structure for the active highway tunnel diseases comprises a tunnel secondary lining open-water-free treatment system, a tunnel secondary lining open-water treatment system, a tunnel secondary lining annular construction joint leakage treatment system, a side wall oblique steel pipe positioning and fixing structure, a side wall oblique steel pipe reinforcement cage positioning structure, a tunnel bottom steel pipe group pile structure and a reinforced concrete panel structure;
in the tunnel secondary lining open water-free treatment system, waterproof paint and waterproof mortar are laid in sequence at an open water crack-free position, an open water point-free seepage position and an open water surface seepage position;
the tunnel secondary lining is provided with an open water treatment system, drilling holes, grouting pipes and joint sealing glue are sequentially arranged at open water spot seepage positions, open water surface seepage positions and open water crack positions, and waterproof paint and waterproof mortar are sequentially laid;
according to the system for treating the leakage of the secondary lining annular construction joint of the tunnel, a water receiving box is arranged at the leakage of the secondary lining annular construction joint of the tunnel and communicated to a side ditch at the lower part of a side ditch cover plate, and an easily cleaned water pool is arranged in the side ditch;
the side wall oblique steel pipe positioning and fixing structure is characterized in that side wall pile holes are drilled in the side wall of a tunnel, a row of side wall oblique steel pipe positioning ribs are respectively arranged above and below the side wall oblique steel pipe with the side wall oblique steel pipe wall hole, the side wall oblique steel pipe is positioned in the side wall oblique steel pipe drilling hole wall, one end of each side wall oblique steel pipe positioning rib is connected with the side wall oblique steel pipe, the other end of each side wall oblique steel pipe positioning rib abuts against the side wall oblique steel pipe drilling hole wall, and a shaping hole opening closed support is arranged at the upper pipe opening position of the side wall oblique steel pipe;
in the side wall oblique steel pipe reinforcement cage positioning structure, the side wall of the tunnel is reinforced through oblique cross side wall steel pipe piles, and the lower pipe orifice of the side wall oblique steel pipe is provided with a welding fixing short rod which is connected with a compression-expansion fixture, and the compression-expansion fixture faces downwards along the side wall oblique steel pipe;
in the tunnel bottom steel pipe group pile structure, the tunnel bottom steel pipe group pile consists of a plurality of tunnel bottom steel pipe piles, a tunnel bottom pile hole is drilled at the tunnel bottom, a tunnel bottom steel pipe is placed in the tunnel bottom pile hole, a tunnel bottom steel pipe reinforcement cage is placed in the tunnel bottom steel pipe, and concrete is poured to form the tunnel bottom steel pipe pile;
in the reinforced concrete panel structure, a steel reinforcement cage at the end of the top of the steel pipe pile is bound with a laid reinforced concrete panel reinforcing mesh to form a reinforcing cage connecting structure, a longitudinal template is erected, the reinforced concrete panel is poured through a movable operating platform at the top of a side ditch cover plate supported on side ditches at two sides, vertical supporting pieces are arranged in the side ditches, and the movable operating platform is connected with a travelling mechanism through travelling wheels; and paving an asphalt upper surface layer on the reinforced concrete panel.
Preferably, the method comprises the following steps: the easy clearance pond include easy clearance pond fixing device, take filter equipment's U type groove and baffle, the easy clearance pond is connected through easy clearance pond fixing device with the side ditch lateral wall, be equipped with U type groove A of taking filter equipment and the U type groove B of taking filter equipment in the easy clearance pond, be equipped with the shadoof on the U type groove A of taking filter equipment and the U type groove B of taking filter equipment respectively, the U type groove of taking filter equipment loops through baffle and drain pipe intercommunication side ditch, is equipped with the switch on the drain pipe.
Preferably, the method comprises the following steps: the regularization drill way closed support include hoop, bracing piece and base, the hoop is established to limit wall slant steel pipe upper portion mouth of pipe position cover, evenly even a plurality of bracing piece on the hoop, the bracing piece becomes the acute angle with limit wall slant steel pipe, bracing piece lower link base constitutes stable supporting structure.
The construction method of the active highway tunnel disease comprehensive treatment structure comprises the following steps:
step one, treating cracks and water leakage
1) On the basis of disease investigation and interface treatment, sequentially paving waterproof paint and waterproof mortar at a position without open water cracks, a position without open water spot seepage and a position without open water surface seepage;
2) drilling holes, cleaning holes, crack surface treatment, installing grouting pipes and injecting joint sealing glue at open water spot seepage positions, open water surface seepage positions and open water crack positions in sequence, then performing injection quality inspection and crack surface treatment, and finally laying waterproof paint and waterproof mortar in sequence;
3) applying a water receiving box at the leakage position of the secondary lining annular construction joint of the tunnel, filling sealing paste, communicating the water receiving box to a side ditch at the lower part of a side ditch cover plate, leading the water to be discharged into an easy-cleaning water pool, filtering the water through the easy-cleaning water pool, and then discharging the water into the side ditch;
step two, reinforcing the steel pipe pile of the side wall
1) Leveling and cleaning the field: setting a pile position, installing a drilling machine to perform hole forming operation, collecting slurry and hole slag generated in the hole forming process in a centralized manner, transporting the slurry and the hole slag out of a construction area after the construction is finished, and checking and protecting the pile;
2) and (3) processing and welding side wall oblique steel pipes and reinforcing steel bars: blanking according to the required length, punching the side wall oblique steel pipe and welding the positioning rib in a processing area outside the hole for processing;
3) pitch positioning: firstly, measuring and setting out, and then, driving the steel bar head into the ground to position according to the diameter, the interval and the row spacing of the holes;
4) drilling side wall pile holes on the side wall of the tunnel: placing the crawler spiral drilling machine at a specified position, and starting the drilling machine to drill until the required depth is reached;
5) hole cleaning: during wet operation, a mud pump is used for cleaning holes by circulating water, and during dry operation, an air compressor is used for blowing holes;
6) side wall slant steel pipe and side wall slant steel pipe steel reinforcement cage are transferred in the installation: a row of side wall oblique steel pipe positioning ribs are respectively arranged above and below the side wall oblique steel pipe with the side wall oblique steel pipe wall hole, then the side wall oblique steel pipe is placed downwards, one end of each side wall oblique steel pipe positioning rib is connected with the side wall oblique steel pipe, the other end of each side wall oblique steel pipe positioning rib props against the side wall oblique steel pipe drilling hole wall, and a shaped orifice closed support is arranged at the position of an upper pipe orifice of the side wall oblique steel pipe; the lower pipe orifice position of the side wall oblique steel pipe is provided with a pressing and expanding clamp which is downward along the side wall oblique steel pipe, when the side wall oblique steel pipe reinforcement cage is inserted, the pressing and expanding clamp is expanded to the periphery and is used for pressing and fixing the side wall oblique steel pipe reinforcement cage, so that the reinforcement cage is centered;
7) pouring concrete: after the steel pipe and the steel reinforcement cage are successfully placed, concrete is poured, a grouting pipe is placed at the bottom of the hole, and the hole opening is sealed by adopting a grouting rubber ball or a woven bag;
step three, steel pipe group piles at the bottom of the tunnel and reconstruction of reinforced concrete panels
1) Leveling and cleaning the field: firstly, determining a pile position, installing a drilling machine, timely transferring slurry and waste slag generated by drilling to the outside of a construction area, checking and protecting a pile;
2) processing of steel pipe at the bottom of the tunnel, processing of steel pipe reinforcement cage at the bottom of the tunnel, processing of road surface reinforcing bar, welding: processing a tunnel bottom steel pipe, welding positioning ribs, processing a tunnel bottom steel pipe reinforcement cage, and processing road surface reinforcements in a processing area outside a tunnel;
3) cutting to break the pavement: firstly, carrying out measurement paying-off, then carrying out pavement cutting according to the paying-off, and finally cleaning a pit groove;
4) pitch positioning: using a steel bar head to be driven into the ground to position according to the diameter, the interval and the row spacing of the holes;
5) drilling a tunnel bottom pile hole in place by a drilling machine: placing the crawler spiral drilling machine at a specified position, and starting the drilling machine to drill until the required depth is reached;
6) hole cleaning: during wet operation, a mud pump is used for cleaning holes by circulating water, and during dry operation, an air compressor is used for blowing holes and cleaning holes;
7) the installation is transferred at the bottom of the tunnel steel pipe and the steel pipe steel reinforcement cage at the bottom of the tunnel: mounting prefabricated tunnel bottom steel pipes and tunnel bottom steel pipe reinforcement cages in the holes, and enabling the reinforcement cages not to be scattered and centered in the hoisting process;
8) pouring the pile concrete of the tunnel bottom steel pipe group: pouring concrete after the tunnel bottom steel pipe and the tunnel bottom steel pipe reinforcement cage are successfully placed, and vibrating by a vibrating spear to be compact;
9) installing the reinforced concrete panel reinforcing mesh, and pouring reinforced concrete panel concrete: the method comprises the steps of manufacturing and installing processed steel bars in place on site, arranging stirrups under steel bar mesh sheets during installation, binding the steel bar mesh sheets of a reinforced concrete panel with a steel bar cage at the top end of a steel pipe pile, then erecting a longitudinal template, pouring the reinforced concrete panel through a movable operating platform supported at the tops of side ditch cover plates on side ditches at two sides, arranging vertical jacking pieces in the side ditches for assisting reinforcement, and connecting the movable operating platform with a walking mechanism through walking wheels to realize the integral movement of the movable operating platform.
The invention has the beneficial effects that:
(1) the invention comprehensively adopts a surface closed position treatment method, a pressure perfusion method and a water receiving box drainage position treatment method, and effectively treats the diseases of structural cracks, water leakage and the like generated in the tunnel lining.
(2) The easy-to-clean water filtering pool is arranged in the drainage ditch at the bottom of the water receiving box, the U-shaped groove with the lifting rod is arranged in the water filtering pool, the water filtering pool is cleaned simply and quickly, and continuous operation of the water filtering pool is effectively guaranteed.
(3) According to the invention, the reinforcement cage at the pile top end of the tunnel bottom steel pipe group pile is bound with the reinforcement mesh of the reinforced concrete panel to form the reinforcement cage connection structure, so that the connection between the reinforced concrete panel and the tunnel bottom steel pipe group pile is enhanced, and the problem of inverted arch deformation is effectively solved by combining the obliquely crossed side wall steel pipe piles of the side wall of the tunnel.
(4) According to the construction of the side wall oblique steel pipe pile, the positioning steel bars are combined with the steel pipe pile orifices to arrange the shaped fixed orifice closed support to realize accurate positioning of the side wall oblique steel pipe pile.
(5) The side wall oblique steel pipe pile reinforcement cage is centered by the pressing and expanding clamp, so that the side wall oblique steel pipe pile reinforcement cage is quickly and accurately positioned, and the tunnel reinforcing quality is effectively improved.
(6) According to the reinforced concrete panel, the reinforced concrete panel is poured through the movable operation platform supported on the two side ditch cover plate tops, so that the pouring construction efficiency of the reinforced concrete panel is effectively improved, and the vertical supporting pieces are arranged in the side ditches to assist in reinforcement so as to ensure that the side edges of the side ditches are not damaged.
Drawings
FIG. 1 is a cross-sectional view of the treatment without open water cracks;
FIG. 2 is a cross-sectional view of treatment without spot infiltration of bright water;
FIG. 3 is a cross-sectional view of the treatment without open water surface seepage;
FIG. 4 is a sectional view of a borehole grouting with open water spot infiltration;
FIG. 5 is a cross-sectional view of a permeable borehole grouting with open water surface;
FIG. 6 is a sectional view of a borehole grouting with open water cracks;
FIG. 7 is a schematic view of a water receiving box for treatment by drainage method;
FIG. 8 is a schematic view of an easy-to-clean pool;
FIG. 9 is a schematic view of the positioning and fixing structure of the oblique steel pipes of the side walls;
FIG. 10 is a partial cross-sectional view of the side wall with the steel reinforcement cage lowered in the form of an oblique steel pipe;
FIG. 11 is a schematic view of a bulk structure at A in FIG. 9;
FIG. 12 is a schematic view of the bulk structure at B in FIG. 9;
FIG. 13 is a schematic view of a tunnel bottom grouting concrete filled steel tube group pile reinforcing structure of an active road tunnel;
FIG. 14 is a schematic view of the bulk structure at C in FIG. 13;
FIG. 15 is a top view of the mobile reinforced concrete deck pouring operation platform;
fig. 16 is a side view of a reinforced concrete panel casting mobile operator platform.
Description of reference numerals: 1-side wall oblique steel pipe; 2-finalizing the orifice closing bracket; 3-oblique steel pipe positioning ribs of the side wall; 4-side wall oblique steel pipe reinforcement cage; 5-side wall inclined steel pipe wall holes; 6-drilling hole walls on the side walls by oblique steel pipes; 7-a hoop; 8-a support bar; 9-a base; 10-welding and fixing the short rod; 11-a companding fixture; 12-tunnel centerline; 13-tunnel side walls; 14-side wall pile hole; 15-side trench cover plate; 16-side ditch; 17-the steel tube group piles at the bottom of the tunnel; 18-steel pipe piles at the bottom of the tunnel; 19-tunnel bottom steel pipe; 20-a steel pipe pile reinforcement cage at the bottom of the tunnel; 21-a reinforcement cage connection structure; 22-a steel reinforcement cage at the top end of the steel pipe pile; 23-reinforced concrete panel reinforcing mesh; 24-reinforced concrete panels; 25-an asphalt top coat; 26-a mobile operating platform; 27-road wheels; 28-a running gear; 29-longitudinal form; 30-oblique crossed side wall steel pipe piles; 31-vertical top struts; 32-tunnel bottom pile hole; 33-waterproof mortar; 34-waterproof coating; 35-no open water cracks; 36-secondary lining; 37-no open water spot infiltration; 38-no open water seepage; 39-grouting pipe; 40-sealing glue; 41-there is open water spot seepage; 42-drilling; 43-open water cracks; 44-a water receiving box; 45-easily cleaning the water tank; 46-easy cleaning pool fixing device; 47-U-shaped groove A with a filter device; 48-U-shaped groove B with a filter device; 49-lifting rod; 50-a separator; 51-a drain pipe; 52-switch.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The comprehensive treatment structure for the active highway tunnel diseases comprises a tunnel secondary lining open-water-free treatment system, a tunnel secondary lining open-water treatment system, a tunnel secondary lining circumferential construction joint leakage treatment system, a side wall oblique steel pipe positioning and fixing structure, a side wall oblique steel pipe reinforcement cage positioning structure, a tunnel bottom steel pipe group pile structure and a reinforced concrete panel structure.
As shown in fig. 1-8, in the tunnel secondary lining treatment system without open water, a waterproof coating 34 and a waterproof mortar 33 are sequentially paved at a position without open water crack 35, a position without open water spot infiltration 37 and a position without open water surface infiltration 38; the tunnel secondary lining is provided with an open water treatment system, a place with an open water spot seepage 41, a place with an open water surface seepage and a place with an open water crack 43 are sequentially provided with a drilling hole 42, a grouting pipe 39 and a sealing glue 40, and then waterproof paint 34 and waterproof mortar 33 are sequentially laid; according to the system for treating the leakage of the tunnel secondary lining annular construction joint, the water receiving box 44 is applied to the leakage of the tunnel secondary lining 36 annular construction joint, the water receiving box 44 is communicated to the side ditch 16 at the lower part of the side ditch cover plate 15, is discharged into the easy-to-clean water pool 45 in a leading mode, and is filtered by the easy-to-clean water pool 45 and then discharged into the side ditch 16. Easy clearance pond 45 including easy clearance pond fixing device 46, take filter equipment's U type groove and baffle 50, easy clearance pond 45 is connected through easy clearance pond fixing device 46 with the side ditch lateral wall, be equipped with U type groove A47 of taking filter equipment and the U type groove B48 of taking filter equipment in the easy clearance pond 45, be equipped with shadoof 49 on the U type groove A47 of taking filter equipment and the U type groove B48 of taking filter equipment respectively, the U type groove of taking filter equipment loops through baffle 50 and drain pipe 51 intercommunication side ditch 16, be equipped with switch 52 on the drain pipe 51. The water leakage guided by the water receiving box 44 firstly enters a U-shaped groove A47 with a filtering device, is filtered in a U-shaped groove A47 with the filtering device and then is filtered again through a partition plate 50, and then is discharged into the side ditch 16 through a water discharge pipe 51 after opening a switch 52; when the U-shaped groove A47 with the filter device needs to be cleaned, the lifting rod 49 is used for lifting the U-shaped groove A47 with the filter device, and the U-shaped groove B48 with the filter device is moved to the position of the U-shaped groove A47 with the filter device, so that the continuous work of the water tank 45 easy to clean is not influenced.
As shown in fig. 9-16, in the side wall oblique steel pipe positioning and fixing structure, a side wall pile hole 14 is drilled in a tunnel side wall 13, a row of side wall oblique steel pipe positioning ribs 3 are respectively arranged above and below a side wall oblique steel pipe 1 provided with a side wall oblique steel pipe wall hole 5, the side wall oblique steel pipe 1 is positioned in a side wall oblique steel pipe drilling hole wall 6, one end of each side wall oblique steel pipe positioning rib 3 is connected with the side wall oblique steel pipe 1, the other end of each side wall oblique steel pipe positioning rib abuts against the side wall oblique steel pipe drilling hole wall 6, and a shaped hole opening sealing bracket 2 is arranged at the upper pipe opening position of the side wall oblique steel pipe 1; in the side wall oblique steel pipe reinforcement cage positioning structure, a tunnel side wall 13 is reinforced through oblique cross side wall steel pipe piles 30, a welding fixing short rod 10 is arranged at the position of a pipe orifice at the lower part of a side wall oblique steel pipe 1, the welding fixing short rod 10 is connected with a compression-expansion fixture 11, the compression-expansion fixture 11 is downward along the side wall oblique steel pipe 1, and the compression-expansion fixture 11 is diffused towards the periphery and is used for accumulating and fixing the side wall oblique steel pipe reinforcement cage 4 when the side wall oblique steel pipe reinforcement cage 4 is inserted; in the tunnel bottom steel pipe group pile structure, the tunnel bottom steel pipe group pile 17 consists of a plurality of tunnel bottom steel pipe piles 18, a tunnel bottom pile hole 32 is drilled at the tunnel bottom, then a tunnel bottom steel pipe 19 is placed in the tunnel bottom pile hole 32, a tunnel bottom steel pipe reinforcement cage 20 is placed in the tunnel bottom steel pipe 19, and finally concrete is poured to form the tunnel bottom steel pipe pile 18; in the reinforced concrete panel structure, a steel reinforcement cage 22 at the top end of a steel pipe pile and a laid reinforced concrete panel reinforcement mesh 23 are bound to form a reinforcement cage connecting structure 21, a longitudinal template 29 is erected, a reinforced concrete panel 24 is poured through a movable operating platform 26 at the top of a side ditch cover plate 15 supported on side ditches 16 at two sides, a vertical supporting piece 31 is arranged in each side ditch for assisting reinforcement, and the movable operating platform 26 is connected with a travelling mechanism 28 through travelling wheels 27 to realize the integral movement of the movable operating platform 26; an asphalt upper surface layer 25 is laid on the reinforced concrete panel 24. Stereotype drill way closed support 2 include hoop 7, bracing piece 8 and base 9, 1 upper portion mouth of pipe position cover of side wall slant steel pipe is established hoop 7, evenly even has three bracing piece 8 on hoop 7, bracing piece 8 and 1 acutangular angle of side wall slant steel pipe, bracing piece 8 is lower even base 9 to constitute stable supporting structure.
The main construction process of the active highway tunnel disease comprehensive treatment structure is as follows:
step one, treating cracks and water leakage
1) On the basis of disease investigation and interface treatment, waterproof paint 34 and waterproof mortar 33 are paved at the position without open water crack 35, the position without open water spot penetration 37 and the position without open water surface penetration 38 in sequence.
2) Drilling holes 42, cleaning holes, crack surface treatment, installation of grouting pipes 39 and grouting of joint sealing glue 40 are sequentially arranged at the open water spot seepage 41 part, the open water surface seepage part and the open water crack 43 part, then the grouting quality inspection and the crack surface treatment are performed, and finally the waterproof coating 34 and the waterproof mortar 33 are sequentially paved.
3) Applying a water receiving box 44 at the annular construction joint leakage position of the tunnel secondary lining 36, filling sealing paste, communicating the water receiving box 44 to the side ditch 16 at the lower part of the side ditch cover plate 15, leading the water to be discharged into an easy-cleaning water pool 45, filtering the water through the easy-cleaning water pool 45, and discharging the water into the side ditch 16.
Step two, reinforcing the steel pipe pile of the side wall
1) Leveling and cleaning the field: and (4) determining a pile position according to requirements, installing a drilling machine to perform hole forming operation, collecting slurry and hole slag generated in the hole forming process in a centralized manner, transporting the slurry and the hole slag out of a construction area after the construction is finished, and checking and protecting the pile.
2) Side wall slant steel pipe 1, reinforcing bar processing welding: and blanking according to the required length, punching the side wall oblique steel pipe 1 and welding the positioning ribs in a processing area outside the hole.
3) Pitch positioning: firstly, measuring and setting out, and then, driving the steel bar head into the ground to position according to the diameter, the distance and the row spacing of the holes.
4) Drilling a side wall pile hole 14 on the side wall 13 of the tunnel: and (3) placing the crawler spiral drilling machine at a specified position, starting the drilling machine, and slowly drilling until the required depth is reached.
5) Hole cleaning: during wet operation, a mud pump is used for cleaning holes by circulating water, and during dry operation, an air compressor is used for blowing holes.
6) Side wall slant steel pipe 1 and side wall slant steel pipe steel reinforcement cage 4 are transferred in the installation: a row of side wall oblique steel pipe positioning ribs 3 are respectively arranged above and below a side wall oblique steel pipe 1 provided with a side wall oblique steel pipe wall hole 5, then the side wall oblique steel pipe 1 is placed downwards, one end of each side wall oblique steel pipe positioning rib 3 is connected with the side wall oblique steel pipe 1, the other end of each side wall oblique steel pipe positioning rib props against a side wall oblique steel pipe drilling hole wall 6, and a shaped orifice closing support 2 is arranged at the position of an upper pipe orifice of the side wall oblique steel pipe 1; the lower pipe orifice of the side wall oblique steel pipe 1 is provided with a pressing and expanding clamp which is downward along the side wall oblique steel pipe 1, when the side wall oblique steel pipe reinforcement cage 4 is inserted, the pressing and expanding clamp 11 is used for spreading around and overstressing and fixing the side wall oblique steel pipe reinforcement cage 4, and the reinforcement cage is ensured to be centered.
7) Pouring concrete: and after the steel pipe and the steel reinforcement cage are successfully placed, pouring concrete, placing the grouting pipe at the bottom of the hole, and sealing the hole opening by adopting a grouting rubber ball or a woven bag.
Step three, the steel pipe group piles 17 at the bottom of the tunnel and the rebuilt reinforced concrete panel 24
1) Leveling and cleaning the field: firstly, a pile position is determined, a drilling machine is installed, slurry and waste slag generated by drilling are timely transported to the outside of a construction area, and the pile is inspected and protected.
2) 19 processing of steel pipe at the bottom of the tunnel, 20 processing of steel pipe reinforcement cage at the bottom of the tunnel, road surface reinforcing bar processing, welding: and (3) processing the tunnel bottom steel pipe 19, welding the positioning ribs, processing the tunnel bottom steel pipe reinforcement cage 20 and processing the road surface reinforcements in the processing area outside the tunnel.
3) Cutting to break the pavement: firstly, carrying out measurement and paying-off, then carrying out pavement cutting according to the paying-off, and finally cleaning the pit slot.
4) Pitch positioning: using a steel bar head to be driven into the ground to position according to the diameter, the interval and the row spacing of the holes;
5) the drilling machine is in place to drill a tunnel bottom pile hole 32: and (3) placing the crawler spiral drilling machine at a specified position, starting the drilling machine, and slowly drilling until the required depth is reached.
6) Hole cleaning: during wet operation, a mud pump is used for cleaning holes by circulating water, and during dry operation, an air compressor is used for blowing holes and cleaning holes.
7) The installation is transferred at the bottom of 19 steel pipes at the bottom of the tunnel and the steel pipe steel reinforcement cage 20 at the bottom of the tunnel: and a pre-manufactured tunnel bottom steel pipe 19 and a tunnel bottom steel pipe reinforcement cage 20 are timely installed in the hole, and the reinforcement cage is prevented from being scattered and centered in the hoisting process.
8) Pouring 17 concrete of the steel pipe group piles at the bottom of the tunnel: and after the tunnel bottom steel pipe 19 and the tunnel bottom steel pipe reinforcement cage 20 are successfully placed, concrete is poured, and the vibrating rod vibrates compactly.
9) And (3) installing the reinforced concrete panel reinforcing mesh 23, and pouring 24 concrete of the reinforced concrete panel: the processed steel bars are manufactured and installed in place on site, a stirrup is arranged under the steel bar net piece during installation, the steel bar net piece 23 of the reinforced concrete panel is bound with a steel bar cage 22 at the top end of the steel pipe pile, then a longitudinal template 29 is erected, the reinforced concrete panel 24 is poured through a movable operating platform 26 at the top of a side ditch cover plate 15 supported on side ditches 16 at two sides, a vertical supporting piece 31 is arranged in each side ditch for assisting reinforcement, and the movable operating platform 26 is connected with a traveling mechanism 28 through traveling wheels 27 to realize the integral movement of the movable operating platform 26.