CN117449226A - Pipe culvert protection construction method - Google Patents

Abstract

The invention discloses a pipe culvert protection construction method, which comprises the steps of erecting a pile foundation construction platform in advance and carrying out pile foundation construction, dismantling the construction platform after completing pile foundation construction, then carrying out pier foundation construction, and finally completing pipe culvert structure construction and road surface layer construction, thereby effectively solving the problem that the prior pipeline buried in the prior art is easily influenced in construction because a construction area coincides with a prior production project in water factory reconstruction and expansion engineering, overcoming the technical defects that the prior pipeline protection method cannot avoid influencing the prior pipeline with a relatively close distance and has poor protection effect, and having the characteristics of avoiding influencing the prior pipeline with a relatively close distance and effectively protecting the pre-buried pipeline in the prior engineering.

Description

Pipe culvert protection construction method

Technical Field

The invention belongs to the technical field of building construction, and particularly relates to a pipe culvert protection construction method.

Background

In the construction of the reconstruction and expansion project of the water plant, because the reconstruction and expansion project is different from the conventional new project, the construction period is compact and the task is heavy, in the actual construction, the reconstruction and expansion area is generally integrated with the primary production facility, but not reconstructed on the new area, and in the construction process, the construction process and the primary production density are not connected and are mutually influenced; moreover, the construction site conditions of the reconstruction and expansion project are generally limited, a plurality of production pipelines in one period are often involved in the construction range, and the situation of depth burial and the complicated surrounding environment of the individual pipelines are also generally existed; therefore, during construction of the reconstruction and expansion project, normal operation of primary production is not influenced by construction, stable promotion of the project is guaranteed, construction efficiency is considered, and influence on primary project production is reduced as much as possible.

For such a situation, the prior art generally requires pipeline protection for the pipeline in the construction area; the common pipeline protection scheme adopted in the prior art has the measures of grouting reinforcement, concrete encapsulation outside a steel pipe or sleeve protection and the like; these methods suffer from the following drawbacks:

1, grouting reinforcement: the soil in the range of 1m at the two sides of the pipeline and 0.5m above the top of the pipeline is compacted, grouting and reinforcement are carried out, so that the strength of soil around the pipeline can be effectively improved, the load of a vehicle is diffused to the bottom of a reinforcement area, and the grouting pressure is 0.2-7.0 MPa. However, the existing pipeline exists near the engineering pipeline, the distance is relatively short, the service life of the pipeline is relatively long, grouting can affect the peripheral pipeline, the grouting reinforcement effect is not durable, and in addition, the grouting force is too large to damage the structure to a certain extent, so that new cracks can be generated on the pipeline.

2, concrete encapsulation: the reinforced concrete is adopted to encapsulate the pipeline, and the reinforced concrete structure and the pipeline are utilized to jointly resist the upper load, so that the stress of the pipeline body is reduced. However, the distance between the existing pipelines is relatively short, the construction conditions are not necessarily met, meanwhile, the whole process can be completed only by casting the encapsulated concrete for more than two times in construction, the construction quality problem is often caused by the fact that the constructor does not pay attention to quality control in the second casting, and the construction period is delayed due to reworking in severe cases, so that the process becomes a quality common problem, in addition, the flexible joint is influenced by the construction of the encapsulated pipeline, and the pipeline is influenced to a certain extent.

3, sleeve protection: in general, in reconstruction and expansion engineering, construction of buried pipelines traversing various roads is generally involved, and for safety consideration in the use stage of the pipelines, protection sleeves are generally arranged to protect the pipelines. However, for the region with abundant groundwater content, the use of the pipeline sleeve is very easy to be influenced by water level, so that sleeve deviation, corrosion and the like are caused to influence the construction quality of the pipeline, and meanwhile, the sleeve protection method is mainly applied to the newly buried pipeline, is complicated to construct aiming at the process of the existing pipeline, and the final protection effect is still to be improved.

Therefore, it is necessary to design a pipe culvert protection construction method to solve the above-mentioned problems.

Disclosure of Invention

The invention aims to solve the technical problems that the existing pipeline buried in the early stage is easily affected in construction due to the superposition of a construction area and the early-stage production project in the reconstruction and extension project of a water plant, and the problems that the existing pipeline with a relatively close distance is affected and the protection effect is poor cannot be avoided in the pipeline protection method in the prior art, and the method has the characteristics that the influence on the existing pipeline with a relatively close distance can be avoided, and the embedded pipeline in the early-stage project can be effectively protected.

A pipe culvert protection construction method comprises the following steps:

s1, construction preparation and measurement lofting, wherein the construction preparation comprises technical preparation and site preparation;

s2, erecting a pile foundation construction platform, wherein the concrete method comprises the following steps:

firstly, excavating earthwork until the position of a plane is confirmed at the bottom of a pipe;

then manufacturing the steel pipe pile and inserting and driving the steel pipe pile;

and finally, carrying out platform support system construction: firstly, pile top distribution beam construction is carried out, then longitudinal beams and transverse beams are sequentially paved above the pile top distribution beam, and finally a plurality of pattern steel plates are paved at equal intervals;

s3, pile foundation construction, wherein the concrete method is as follows:

s301, digging embedded holes, and burying steel pile casings, wherein the steel pile casings are buried between gaps of the pattern steel plates;

s302, positioning a pile driver and preparing slurry, wherein the concrete method comprises the following steps:

gradually moving the drilling machine to a construction hole site by utilizing the self power of the drilling machine and the rolling rod, and rechecking the pile position to ensure that the center of the drilling disc is consistent with the center of the pile;

when the drilling machine is installed in place, the base is tightly plugged by a sleeper pad, the top end of the base is stably fixed by a cable rope, and the perpendicularity of a drill rod of the machine head and the levelness of the frame platform are controlled;

before drilling, measuring the length of a drill rod and a drill bit, marking numbers on the drill rod and recording the lengths of all sections; rechecking the length of the drill rod before the drill rod is put down in drilling;

checking at regular time in the drilling process, keeping the level of the turntable surface and the vertical of the drilling machine frame, and keeping the perpendicularity and the aperture of the pile body;

s303, drilling holes through a pile driver;

s304, checking the quality of hole forming and cleaning holes of the drilled holes;

s305, manufacturing reinforcement cages in sections, hoisting reinforcement cages in sections, welding one section after each hoisting, and then hoisting the next section;

s306, performing catheter placement and secondary hole cleaning: the guide pipe is assembled beside the drilling hole in a segmented way in advance, and is assembled section by adopting screw thread connection during hanging; the position of the guide pipe is in the hole when the guide pipe is hung, the axis is straight, and the steel reinforcement framework is prevented from being blocked and hung and the hole wall is prevented from being collided when the guide pipe is lowered; the top of the guide pipe is provided with a funnel, and a chute, a storage hopper and a working platform are arranged above the funnel;

s307, pouring concrete, and detecting pile foundation after the concrete is formed into piles;

s4, dismantling a pile foundation construction platform:

the sequence of removing the pile foundation construction platform is opposite to that of the step S2, the pattern steel plate, the cross beam, the longitudinal beam and the pile top distribution beam are removed in sequence, and finally the steel pipe pile is removed;

s5, pier foundation construction, wherein the concrete method is as follows:

s501, pile head processing: after chiseling off the pile head of the bored pile, reserving the length of an embedded bearing platform with a fixed length;

s502, binding pier steel bars;

s503, mounting a pier template:

when the template is installed, the gap of the template joint is sealed and stuck through the double-sided adhesive tape, so that slurry leakage is prevented; the butt joint of the templates is reinforced and connected by screws, an upper opposite-pull screw rod and a lower opposite-pull screw rod are welded with the main ribs of the bearing platform, and the two sides of the middle part are through long;

s504, pouring pier concrete;

s505, removing the template and backfilling earthwork:

s6, construction of a pipe culvert structure, wherein the concrete method comprises the following steps:

s601, extruding plate construction;

s602, cushion layer construction, wherein the concrete method comprises the following steps:

firstly measuring and paying off, then installing a concrete cushion layer side template, pouring concrete, then manually leveling and vibrating and leveling by a flat vibrator, and finally manually harvesting and curing for 2-3 days;

s603, constructing reinforced concrete plates, wherein the concrete method comprises the following steps:

firstly, carrying out contact surface treatment, then carrying out reinforcement binding installation, then carrying out continuous expansion reinforcing band construction, carrying out template construction and concrete pouring after the completion of the construction, and completing the construction of the reinforced concrete slab after the completion of the concrete curing;

s604, constructing a road surface layer, which sequentially comprises water stabilization layer construction, penetrating layer construction, adhesive layer construction and asphalt surface layer construction;

s605, side flat stone construction, wherein the concrete method is as follows:

firstly, measuring and lofting, then, pouring and tamping a cushion layer, and finally, installing side flat stones.

Preferably, in step S2, the steel pipe pile is manufactured and the steel pipe pile is inserted and driven, and the concrete method is as follows:

s201, positioning a pile position center line by using a measuring instrument, and accurately positioning;

s202, before pile sinking, bolting a vibration pile hammer and the pile top of the steel pipe pile, and checking whether the vertical central lines of the vibration pile hammer and the pile top of the steel pipe pile are consistent; checking whether the pile position is correct or not, and checking whether the perpendicularity of the pile meets the specification or not;

s203, when the inspection is finished and meets the construction conditions, hanging the steel pipe pile, measuring the center deviation and the gradient of the steel pipe pile, adjusting, and quickly inserting the whole steel pipe pile after meeting the requirements;

s204, inserting and driving the steel pipe pile by using a vibration pile driving hammer after each deviation of the steel pipe pile meets the requirement; at the moment, the depth of the steel pipe pile to be buried is shallow, any unbalanced load or horizontal force is extremely easy to cause the inclination of the steel pipe pile, and the vibration pile hammer is constructed vertically downwards to ensure no eccentric force; when a vibration pile driving hammer begins to insert and drive a steel pipe pile, firstly, lightly driving 2-3 hammers, then checking and adjusting the plane position deviation and inclination of the steel pipe pile, and then gradually increasing the driving times and frequency; when the depth of the steel pipe pile to be buried reaches a preset depth, continuously sinking the pile;

s205, after the steel pipe pile is inserted and driven in place, the redundant pipe pile is cut off, a pile top steel plate is welded, a steel pipe pile scissor support and a pile top distribution beam are installed, and the scissor support and the distribution beam are firmly welded with the steel pipe pile.

Preferably, in step S303, the specific method of drilling is as follows:

preparation before drilling:

after the drilling machine is in place, the drill bit is lifted and placed into the casing; starting a winch to hoist the turntable, laying square timber below the turntable base, leveling a drilling machine, aligning drilling holes, installing the turntable, and arranging the center of the turntable on the same plumb line with a hoisting pulley on a drilling frame; the turntable is checked regularly in the drilling process, and the turntable is corrected in time when inclination or displacement occurs;

drilling:

then, starting a winch, lifting the kelly bar to pass through the turntable and firmly connecting the kelly bar to a drill bit, and installing a square sleeve to clamp the kelly bar for ready drilling; the drilling is performed at a low speed when the drilling is started, and the drilling is performed at a low speed when the drilling enters the pile casing buried section, so that a slurry pointer is timely adjusted, and the quality of the pile casing is ensured; in the drilling process, respectively adjusting the speed and the mud specific gravity of different geological layers according to the soil property condition in the geological report so as to prevent hole collapse and hole shrinkage; if the topography or geology is found to be inconsistent with the provided data, timely connecting with a drilling and design unit;

lengthening the drill rod:

when the last drill rod is drilled, stopping rotating the turntable, starting the circulation system to continue to work until the sediment at the bottom of the hole is basically discharged, and then closing the extension drill rod of the slurry pump; a rubber ring is arranged between the joint flanges and the bolts are screwed for sealing; and (3) lengthening the drill rod in the working procedures, and continuing drilling after all the drill rods are normal.

Preferably, in step S603, the method for continuously expanding the reinforcing strip is as follows:

firstly, measuring and paying off, determining the position of an expansion reinforcing belt according to the designed position, then designing the reinforcing steel bars required to bind the expansion reinforcing belt, firstly, erecting vertical short reinforcing steel bars on two sides of the expansion reinforcing belt and binding and fixing the reinforcing steel bars, then hanging a dense-hole wire netting on the vertical short reinforcing steel bars to prevent stones in concrete from passing through, and finally pouring reinforcing belt concrete and curing.

The beneficial effects of the invention are as follows:

the invention provides a pipe culvert protection construction method, which firstly avoids the technical defects that the grouting reinforcement technology often has the existing pipeline nearby due to the fact that the existing pipeline is relatively close in distance and long in service life of the pipeline, grouting possibly affects the pipeline, meanwhile, grouting reinforcement effect is not durable, grouting pressure is difficult to control so that new cracks are generated on the pipeline, and furthermore, the technical defects that the applicability of a concrete encapsulation technology is poor, quality control is difficult to ensure in the construction of encapsulation concrete, construction quality is difficult to cause, reworking is caused when the quality control is serious, construction period is delayed are avoided, meanwhile, the influence of pipe encapsulation construction on a flexible joint is avoided, secondly, the problems that the sleeve protection technology often has the influence of underground water content, the pipeline sleeve is extremely easily affected by water level, sleeve deviation and corrosion are finally caused, the quality of the existing pipeline is affected, and meanwhile, the complicated technological defect of sleeve protection is avoided; meanwhile, practical application results of the technology show that the method has the characteristics of quick construction, easy control of construction quality, high effect of pipeline protection, low construction cost and the like, and can effectively strengthen effective protection of buried deep and important pipelines, reduce uncertain factors in the construction process, thereby improving the construction production safety and greatly improving the construction progress efficiency on site.

Drawings

FIG. 1 is a schematic flow chart of the present invention.

Detailed Description

Embodiment one:

as shown in fig. 1, a construction method for protecting a culvert comprises the following steps:

s1, construction preparation and measurement lofting, wherein the construction preparation comprises technical preparation and site preparation;

s2, erecting a pile foundation construction platform, wherein the concrete method comprises the following steps:

firstly, excavating earthwork until the position of a plane is confirmed at the bottom of a pipe;

then manufacturing the steel pipe pile and inserting and driving the steel pipe pile;

and finally, carrying out platform support system construction: firstly, pile top distribution beam construction is carried out, then longitudinal beams and transverse beams are sequentially paved above the pile top distribution beam, and finally a plurality of pattern steel plates are paved at equal intervals;

s3, pile foundation construction, wherein the concrete method is as follows:

s301, digging embedded holes, and burying steel pile casings, wherein the steel pile casings are buried between gaps of the pattern steel plates;

s302, positioning a pile driver and preparing slurry, wherein the concrete method comprises the following steps:

gradually moving the drilling machine to a construction hole site by utilizing the self power of the drilling machine and the rolling rod, and rechecking the pile position to ensure that the center of the drilling disc is consistent with the center of the pile;

when the drilling machine is installed in place, the base is tightly plugged by a sleeper pad, the top end of the base is stably fixed by a cable rope, and the perpendicularity of a drill rod of the machine head and the levelness of the frame platform are controlled;

before drilling, measuring the length of a drill rod and a drill bit, marking numbers on the drill rod and recording the lengths of all sections; rechecking the length of the drill rod before the drill rod is put down in drilling;

checking at regular time in the drilling process, keeping the level of the turntable surface and the vertical of the drilling machine frame, and keeping the perpendicularity and the aperture of the pile body;

s303, drilling holes through a pile driver;

s304, checking the quality of hole forming and cleaning holes of the drilled holes;

s305, manufacturing reinforcement cages in sections, hoisting reinforcement cages in sections, welding one section after each hoisting, and then hoisting the next section;

s306, performing catheter placement and secondary hole cleaning: the guide pipe is assembled beside the drilling hole in a segmented way in advance, and is assembled section by adopting screw thread connection during hanging; the position of the guide pipe is in the hole when the guide pipe is hung, the axis is straight, and the steel reinforcement framework is prevented from being blocked and hung and the hole wall is prevented from being collided when the guide pipe is lowered; the top of the guide pipe is provided with a funnel, and a chute, a storage hopper and a working platform are arranged above the funnel;

s307, pouring concrete, and detecting pile foundation after the concrete is formed into piles;

s4, dismantling a pile foundation construction platform:

the sequence of removing the pile foundation construction platform is opposite to that of the step S2, the pattern steel plate, the cross beam, the longitudinal beam and the pile top distribution beam are removed in sequence, and finally the steel pipe pile is removed;

s5, pier foundation construction, wherein the concrete method is as follows:

s501, pile head processing: after the pile head of the bored pile is chiseled, reserving the length of an embedded bearing platform of 65 cm;

s502, binding pier steel bars;

s503, mounting a pier template:

when the template is installed, the gap of the template joint is sealed and stuck through the double-sided adhesive tape, so that slurry leakage is prevented; the butt joint of the templates is reinforced and connected by screws, an upper opposite-pull screw rod and a lower opposite-pull screw rod are welded with the main ribs of the bearing platform, and the two sides of the middle part are through long;

s504, pouring pier concrete;

s505, removing the template and backfilling earthwork:

s6, construction of a pipe culvert structure, wherein the concrete method comprises the following steps:

s601, extruding plate construction;

s602, cushion layer construction, wherein the concrete method comprises the following steps:

firstly measuring and paying off, then installing a concrete cushion layer side template, pouring concrete, then manually leveling and vibrating and leveling by a flat vibrator, and finally manually harvesting and curing for 2-3 days;

s603, constructing reinforced concrete plates, wherein the concrete method comprises the following steps:

firstly, carrying out contact surface treatment, then carrying out reinforcement binding installation, then carrying out continuous expansion reinforcing band construction, carrying out template construction and concrete pouring after the completion of the construction, and completing the construction of the reinforced concrete slab after the completion of the concrete curing;

s604, constructing a road surface layer, which sequentially comprises water stabilization layer construction, penetrating layer construction, adhesive layer construction and asphalt surface layer construction;

s605, side flat stone construction, wherein the concrete method is as follows:

firstly, measuring and lofting, then, pouring and tamping a cushion layer, and finally, installing side flat stones.

Preferably, in step S2, the steel pipe pile is manufactured and the steel pipe pile is inserted and driven, and the concrete method is as follows:

s201, positioning a pile position center line by using a measuring instrument, and accurately positioning;

s202, before pile sinking, bolting a vibration pile hammer and the pile top of the steel pipe pile, and checking whether the vertical central lines of the vibration pile hammer and the pile top of the steel pipe pile are consistent; checking whether the pile position is correct or not, and checking whether the perpendicularity of the pile meets the specification or not;

s203, when the inspection is finished and meets the construction conditions, hanging the steel pipe pile, measuring the center deviation and the gradient of the steel pipe pile, adjusting, and quickly inserting the whole steel pipe pile after meeting the requirements;

s204, inserting and driving the steel pipe pile by using a vibration pile driving hammer after each deviation of the steel pipe pile meets the requirement; at the moment, the depth of the steel pipe pile to be buried is shallow, any unbalanced load or horizontal force is extremely easy to cause the inclination of the steel pipe pile, and the vibration pile hammer is constructed vertically downwards to ensure no eccentric force; when a vibration pile driving hammer begins to insert and drive a steel pipe pile, firstly, lightly driving 2-3 hammers, then checking and adjusting the plane position deviation and inclination of the steel pipe pile, and then gradually increasing the driving times and frequency; when the depth of the steel pipe pile to be buried reaches 3cm, continuously sinking the pile;

s205, after the steel pipe pile is inserted and driven in place, the redundant pipe pile is cut off, a pile top steel plate is welded, a steel pipe pile scissor support and a pile top distribution beam are installed, and the scissor support and the distribution beam are firmly welded with the steel pipe pile.

Preferably, in step S303, the specific method of drilling is as follows:

preparation before drilling:

after the drilling machine is in place, the drill bit is lifted and placed into the casing; starting a winch to hoist the turntable, laying square timber below the turntable base, leveling a drilling machine, aligning drilling holes, installing the turntable, and arranging the center of the turntable on the same plumb line with a hoisting pulley on a drilling frame; the turntable is checked regularly in the drilling process, and the turntable is corrected in time when inclination or displacement occurs;

drilling:

then, starting a winch, lifting the kelly bar to pass through the turntable and firmly connecting the kelly bar to a drill bit, and installing a square sleeve to clamp the kelly bar for ready drilling; the drilling is performed at a low speed when the drilling is started, and the drilling is performed at a low speed when the drilling enters the pile casing buried section, so that a slurry pointer is timely adjusted, and the quality of the pile casing is ensured; in the drilling process, respectively adjusting the speed and the mud specific gravity of different geological layers according to the soil property condition in the geological report so as to prevent hole collapse and hole shrinkage; if the topography or geology is found to be inconsistent with the provided data, timely connecting with a drilling and design unit;

lengthening the drill rod:

when the last drill rod is drilled, stopping rotating the turntable, starting the circulation system to continue to work until the sediment at the bottom of the hole is basically discharged, and then closing the extension drill rod of the slurry pump; a rubber ring is arranged between the joint flanges and the bolts are screwed for sealing; and (3) lengthening the drill rod in the working procedures, and continuing drilling after all the drill rods are normal.

Preferably, in step S603, the method for continuously expanding the reinforcing strip is as follows:

firstly, measuring and paying off, determining the position of an expansion reinforcing belt according to the designed position, then designing the reinforcing steel bars required to bind the expansion reinforcing belt, firstly, erecting vertical short reinforcing steel bars on two sides of the expansion reinforcing belt and binding and fixing the reinforcing steel bars, then hanging a dense-hole wire netting on the vertical short reinforcing steel bars to prevent stones in concrete from passing through, and finally pouring reinforcing belt concrete and curing.

Embodiment two:

taking a certain project as an example, 8 water purifying process pipelines exist below a road between a pressure stabilizing distribution well and a mixed sedimentation tank, the pipeline adopts D1220 multiplied by 12 steel pipes, and because the road cannot be reinforced in whole width, heavy-load vehicles always pass above the pipeline, and the problems of pipe explosion and the like always occur in the past, the pipeline needs to be protected by a pipe culvert, and the concrete construction method comprises the following steps:

the preparation method comprises the following steps:

(1) Before construction, the measurement control points should be retested, the measurement control points should be arranged at stable positions which are not affected by construction, and the retested should be properly protected in the construction process.

(2) The performance and the precision of instruments and meters used for construction quality detection and safety monitoring can be used after correction by a metering department.

(3) Related technical data such as underground pipelines in engineering sites and adjacent areas are prepared completely.

Preparing in the field:

(1) Before construction, the site sundries should be removed, underground pipelines and air-raid shelters should be ascertained and rechecked, underground barriers at pile positions should be removed, the site is leveled, the site ground elevation and control points should be rechecked, the drilling and measuring and paying off are carried out, transportation roads are arranged, and a water supply and power supply system is arranged. The site conditions should meet the requirements of construction machinery operation, vehicle transportation and the like.

(2) The construction site is provided with an enclosing wall or a fence for ground hardening, and a vehicle cleaning facility is arranged to meet the requirements of safe civilized construction and environmental protection.

(3) The construction site is provided with a slurry preparation, circulation and purification system, the slurry is recycled, and the construction process with less slurry discharge and slag discharge is adopted.

(4) The performance of the pore-forming equipment meets the requirements of drilling and lifting capacity, and the drilling frame meets the requirements of bearing capacity and maximum lifting height.

Further, the pile foundation construction platform adopts a steel pipe pile foundation with phi 530 multiplied by 10mm, the pile length is 9m, double-spliced I45b is paved on the steel pipe pile as a pile top distribution beam, I40b longitudinal distribution beams are paved on a capping beam, the interval is 700-800 mm unequal, I12.6 is continuously paved on the longitudinal distribution beams, the interval is 300-400 mm unequal, and 10mm thick pattern steel plates are fully paved. The plane size of the construction platform is 40m long by 6m wide, and 10 steel pipe piles are adopted as the foundation of the construction platform.

Further, in the construction of the platform supporting system, two groups of pile top distribution beams are divided, one group of two I45b distribution beams are hoisted by a 25t automobile crane, and the distribution beams are immediately welded and fixed after being placed on the pile top reinforced steel plate; and the two sides of the I-steel are welded and connected with the pile top by 8# channel steel; the type of the welding material is matched with that of the welding material, the length of the welding line is 50-100 mm, and the interval is 400-600 mm; the weld joint has no defects such as cracks, air holes, slag inclusion, weld flash and the like, otherwise, the weld joint should be treated and corrected; if the weld joint cracks, the reason should be ascertained, and the welding is performed again after the cleaning.

The longitudinal beams are hoisted in groups by adopting 25t automobile cranes, two I40b I-steel longitudinal beams are hoisted in groups, the I40b I-steel longitudinal beams are welded into a whole in advance before hoisting, one span is hoisted, a single group of hoisting is adopted during installation, and 7 groups of steel main beams are arranged in one span type steel trestle. The longitudinal beam and the pile top distribution beam are connected by adopting high-strength bolts, and the middle distance and the side distance of each row of bolts cannot be too small so as to avoid the mutual influence of stress concentration around the bolts; the bolt spacing cannot be too close, the clearance requirement is met, the installation is convenient, the pitch is more than or equal to 1.5d, the edge spacing is more than or equal to 3d, and the end spacing is more than or equal to 2d. And avoiding the plane position where piling is required, and ensuring that the pile foundation pile casing is not influenced.

After the longitudinal girder is installed, transverse distribution girders are uniformly arranged on the girder at intervals of 40cm by adopting I12.6 and welded with the girder into a whole, so that the overall stability is ensured.

And (3) bridge deck system construction: the pile foundation construction platform is in consideration of the need of reserving drilling pile holes, so that the whole bridge deck is not considered to be paved, 10mm thick pattern steel plates are evenly distributed on the cross beam at intervals, the steel plates are connected and fixed in a welding mode, the steel plates are connected in a lap joint mode, and adjacent lap joint welding seams are staggered; the steel bridge guard rail adopts steel pipes with phi 48.3mm multiplied by 3.6mm, the vertical rod height is 1.2m, 3 horizontal rods are arranged at equal height in the horizontal direction, a safety vertical net is arranged, and the vertical rod is directly welded on the transverse distribution beam. The horizontal pole is installed in the pole setting outside, adopts welded connection.

Further, the step of burying the steel pile casing sequentially comprises the following steps: measuring lofting, leveling, digging embedded holes, placing protective cylinders, kong Zhouben filling clay and irrigating water to check whether water leakage exists.

Further, the protection cylinder has the functions of: fixing the pile position and guiding the drilling; protecting the orifice, preventing the orifice soil layer from collapsing; isolating the water on the inner surface layer and the outer surface layer of the hole, keeping the water level in the drilled hole higher than the water level outside the protection cylinder by more than 1.0 meter, and ensuring the water head in the protection cylinder.

Therefore, the embedded pile casing is required to be stable and accurate and is embedded into hard soil by more than 50 cm; the protective cylinder is firm, durable, not easy to deform, water-tight, convenient to assemble and disassemble and capable of being reused; the inner diameter of the pile casing is slightly larger than the design diameter of the bored pile; the protective cylinder is made of steel protective cylinder with flange and made of 5mm thick steel plate. In order to increase rigidity and prevent deformation, stiffening ribs can be welded on the upper end, the lower end and the outer side of the middle part of the pile casing respectively, and the pile casing can be made into an integral shape or a two-semicircle shape.

Further, the following should be noted when embedding the casing:

(1) The pile casing plane should be buried correctly, and the deviation should not be greater than 50mm.

(2) The elevation of the top of the pile casing is 1.0-2.0 meters higher than the highest construction water level;

(3) The pile casing buried under water sinks to a stable depth along the guide frame by means of dead weight, water jet, vibration or hammering; depth of penetration: the clay is 0.5-1.0 m, and the sandy soil is 3-4 m.

(4) The pit digging of the lower embedded type and the upper embedded type pile casings is not suitable to be too large, the diameter of the pit digging is generally 1.0-0.6 m larger than that of the pile casings, the periphery of the pile casings is compacted and filled with compact clay, the bottoms of the pile casings are embedded in stable clay layers, otherwise, the clay needs to be replaced and compacted, and the thickness of the pile casings is generally 0.5 m.

Further, the prepared drilling mud and the mud subjected to circulating purification adopt the relative density of 1.2-1.3g/cm according to the stratum condition ³ Viscosity of 17-20s, pH value of 8-10, colloid ratio>96% of slurry with sand content less than or equal to 2%.

Further, the method for installing the reinforcement cage comprises the following steps:

when the framework enters the hole, the framework is straightened and descends, and the swing collision hole wall is forbidden. When the framework descends to the position near the second lifting point, the stiffening hoop approaches the orifice, a wooden stick or a steel drill rod can penetrate through the lower part of the stiffening hoop, the framework is temporarily supported at the orifice, the lifting hook is moved to the upper end of the framework, the temporary support is taken out, and the framework is continuously descended to the position of the stiffening hoop behind the framework and is temporarily supported according to the method; at the moment, the second section of framework can be hung, so that the upper section of framework and the lower section of framework are positioned on the same vertical line for welding; after the last joint is welded, all joints can sink into water. The joint is completed, the framework is lifted slightly, the temporary support is pulled out, the framework is slowly lowered, and the circulation is performed so that the framework is lowered to the designed elevation. Finally, four lead wires are used for binding the framework on a chassis of the drilling frame or a well frame temporarily arranged at the orifice, so that the hanging point of the framework can be loosened.

The reinforcement cage is installed by using a bored pile machine or a crane at the orifice, and residual deformation of the reinforcement cage cannot be caused in the hoisting process. The reinforcement cage is lengthened by adopting a welded joint, so that the technical requirements are met; the steel reinforcement cages are sequentially hoisted according to the serial number sequence when being butted, the perpendicularity of the steel reinforcement cages is checked before being lowered, and the center lines of the upper section steel reinforcement cage and the lower section steel reinforcement cage are ensured to be consistent when being butted; four main reinforcements of the reinforcement cage are welded and fixed with the top of the steel casing in time after the reinforcement cage is installed in place, so that the reinforcement cage is prevented from floating upwards in the concrete pouring process.

Further, the concrete method for the construction of the extruded sheet comprises the following steps:

(1) Base layer cleaning

1. Cleaning residual floating ash sundries, removing concrete blocks, inclusions, falling slurry and leveling a base layer. Cleaning the empty part of the leveling layer, and the like. And repairing again, and compacting by cement mortar.

2. Cement mortar plastering is carried out to ensure that the flatness of the whole wall surface is within 4mm, and the internal and external corners are square and smooth up and down.

(2) Mounting extruded sheet

1. Before construction, the row boards of the extruded sheets are compiled according to the design size of the whole outer wall elevation, so that the purposes of saving materials and realizing construction speed are achieved. The extruded sheet is horizontally paved in a long direction, so that continuous combination is ensured, the upper and lower rows of sheets are required to be vertically staggered by 1/2 of the length of the sheets, the local minimum staggered joint is not smaller than 100mm, and the vertical joint of the mechanically fixed upper and lower rows of sheets can be constructed without staggered joint.

2. The extruded sheet is installed from the detail node to the middle. When in construction, the straightness is required to be controlled, and the ink fountain is required to be used for bouncing the bottom horizontal line and the 100mm control line in advance so as to ensure the horizontal paving, and the paving in the section is carried out from bottom to top.

3. When the extruded sheet is installed, the sheet seam should be squeezed tightly, the adjacent sheets should be flush, the control gap between the sheets should not be more than 2mm in construction, and the height difference between the sheets should not be more than 5mm. When the gap between the plates is larger than 5mm, the gap is fully filled by the extruded battens, the battens are not bonded by mortar or cementing agent, and the flatness height difference of the plate surfaces is not larger than 5mm.

4. At the corner, extruded sheet should perpendicular staggered connection, guarantees the straightness that hangs down of corner panel installation.

5. And (3) polishing the surface of the extruded sheet out of unevenness by using a special polishing trowel, and polishing the whole wall surface once. The scattered polyphenyl scraps should be cleaned by a brush and a broom at any time during polishing.

6. The following should be noted when sticking the extruded sheet:

1) The operation should be rapid, and the adhesive cement must not be skinned before the extruded sheet is installed in place;

2) The joints of the extruded sheet should be tight and aligned, i.e. the side surface of the extruded sheet must not be coated with adhesive cement or extruded with adhesive cement;

3) The action of polishing the wall surface is a gentle circular motion, and the wall surface cannot be polished along the direction parallel to the joint of the extruded sheet;

4) After the extruded sheet is pasted and constructed, polishing can be performed at least at intervals of 24 hours, so that the extruded sheet is prevented from moving, and adhesion is weakened.

Further, the specific method for water stabilization layer construction is as follows:

(1) Before paving the cement stabilized macadam base, all floating soil and sundries on the subbase layer are removed, and the subbase layer is strictly shaped and compacted so as to meet the design requirements and the specifications of drawings.

(2) The cement stabilized macadam foundation construction should be laid by special pavers. The paving and compacting should meet the requirements of design rules or the compaction machine type, paving, compacting method, working procedure, paving thickness, water content control range of the mixture, compaction pass number and the like which are determined by the supervision engineer and are related to the test road.

(3) The cement stabilized macadam is rolled by a three-wheel road roller with 12-15 t, and the compaction times are not less than 6-8 times until no obvious track exists on the surface.

(4) The cement stabilized macadam base adopts a heavy compaction standard, and the compactness is not less than 97%; the stone crush value is no greater than 30%.

(5) Any segregation of the mixture should be removed before rolling and replaced with acceptable material. Neither the mixture with the water content being large nor too small can be paved and rolled.

(6) And after rolling is finished and qualified by inspection of a supervision engineer, the health maintenance is started immediately, and delay is avoided. The life-preserving period is at least 7 days.

(7) After the construction of the water stabilization layer is finished, the project department needs to protect the paved cement stabilization macadam base layer, damage is avoided, and the pavement structural layer needs to be paved as soon as possible after the health maintenance is finished.

Further, the specific method of penetrating layer construction is as follows:

(1) In order to provide good bonding conditions for the base and surface layers, the top surface of the cement stabilized macadam base must be sprayed with a penetrating layer of asphalt, and the asphalt surface layer must be laid after the penetrating layer of asphalt has completely penetrated into the base. The temperature is lower than 10C or the oil can not be sprayed when rainfall occurs in windy weather. The penetrating layer should be sprayed when the surface of the base layer is slightly dry after rolling and forming and is not hardened, and the penetrating layer should not be sprayed after the curing of the base layer, and the penetrating layer oil is confirmed to penetrate into the base layer by drilling or digging after the spraying to have a depth of not less than 5mm, and can be connected with the base layer into a whole. The viscosity of the penetrating asphalt is suitably obtained by adjusting the variety and amount of the diluent, and the penetration of the matrix asphalt is usually preferably not less than 100 (1/10 mm). The emulsified asphalt adopts modified emulsified asphalt (PC-3), and the use amount is that the spraying amount is not less than 1.1L/square meter.

(2) Before spraying the transparent layer oil, the pavement should be cleaned, the protection curbstone and the artificial structure are shielded from pollution, the transparent layer oil must be uniformly spread, the white flower is omitted, the artificial wine is supplemented, and excessive stone dust or sand is immediately spread for oil absorption by spraying, and if necessary, proper rolling is performed. After the penetrating oil is sprayed, an oil skin which can be stuck by the material transporting vehicle and the paver cannot be formed on the surface, and when the penetrating oil cannot meet the penetration depth requirement, the thickness or variety of the penetrating oil should be replaced.

Further, the specific method for the adhesive layer construction is as follows:

in order to bond the asphalt layers or asphalt mixture to the structure completely together, an adhesive layer must be provided. The adhesive layer is preferably carried out before paving the asphalt concrete upper layer, the adhesive layer oil is sprayed on the lower layer, the adhesive layer oil adopts modified emulsified asphalt (PC-2) and the spraying amount of the adhesive layer oil is not less than 0.4L/square meter.

Further, the concrete method for constructing the asphalt surface layer comprises the following steps:

(1) The technical property requirements of the asphalt material of the high-quality road petroleum asphalt are in accordance with the specifications of the acceptance Specification of construction quality of urban road engineering (CJJ 1-2008) and the technical Specification of construction of highway asphalt pavement (JTG F40-2004).

(2) Before paving the asphalt mixture, the curbstone and the flat stone are installed, and meanwhile, loose and uneven bottom layers on the roadside are leveled and compacted.

(3) The gully and inspection well on the road surface should be lifted in advance, and the well Zhou Zaixi is tamped. If the pavement base layer is a loose material, the periphery of the inspection well and the rain water inlet is difficult to tamp.

(4) The asphalt adhesive layer oil should be coated before spreading the oil on the cold joint of road surface or joint with inspection well and gully.

(5) Inspection and discharge of asphalt mixtures

After the asphalt mixture is transported to a construction site, a tester should measure the temperature of the mixture in time (check the position with the depth of 10 cm) and check whether the color is uniform or not, and whether the phenomenon of white stone and particle segregation exists or not. The oil is generally observed to lighten and agglomerate, the oil is less dry and isolated, and the surface after passing through the fire is brown. The appearance inspection of the asphalt mixture is unqualified, and the asphalt mixture is required to be not lower than 120-150 ℃.

(6) Mechanical paving

After unloading, the mixture should be spread rapidly, so as to ensure the thickness of the virtual pavement, the loose and solid consistency and even gradation. The thickness of the virtual pavement is multiplied by the compaction coefficient of 1.25-1.50 (asphalt concrete) according to the design thickness.

(7) And the corners which cannot be spread mechanically are spread manually. The manual spreading adopts a spade buckling method, so that spades are overlapped and are not accurately lifted, and when the spades are buckled, a spade head is required to be scraped backwards slightly, so that the thickness is uniform. When the hand raking vehicle is used for paving, the hot spade is used for flattening, and the hot spade is used for turning over the bottom of the material pile, so that the whole virtual paving layer is consistent in deficiency and reality, and the road surface is ensured to be flat.

(8) Rolling and pressing

1) When the asphalt mixture is paved for a certain period, the asphalt mixture can be rolled when the oil temperature is proper, and the asphalt mixture is generally rolled by 6-8T double wheels until no track exists, is compacted by 10-12T rolling, and eliminates the track.

2) Rolling temperature: the initial grinding temperature of petroleum asphalt is not higher than 140 ℃, and the final vibration grinding temperature is not lower than 65 ℃.

3) The rolling starts from the roadside to the center of the road and is carried out on the half shaft, and the speed is 25-30m per minute.

4) The mill should remain clean and dilution oil (diesel: the water is 1:1-1:2), and the like, the spraying is less, the service and the uniformity are required. Excessive or concentrated amounts of the components are contraindicated to attack the road surface.

5) After rolling for one time, the pavement is checked for the uneven phenomenon of local rough hemp, fine materials are used for repairing in time, and the pavement is aligned once, so that slag is prevented from falling.

(9) Stubble-connecting

1) The transverse seam and the longitudinal seam are connected by direct stubble heat, and the stubble seam direction is vertical or parallel to the line. Brushing a thin layer of oil on the vertical stubble before spreading the oil next time, covering and preheating with a hot mixture, removing after about 5-10min, exchanging a new hot mixture for spreading the continuous stubble, and rolling after sewing and pressing with a hot iron.

2) The parts of roadside, kerb roots, gullies, inspection wells and other structures which are not rolled in place are carefully tamped by manpower.

(10) Open traffic

When the temperature of the asphalt mixture surface layer is reduced to the atmospheric temperature, the traffic can be opened.

Further, the concrete method for the construction of the side flat stone is as follows:

1. measurement lofting

And after the basic layer construction is finished, the basic layer construction is proved to be qualified by a supervision engineer, before the side flat stone is installed, project department measuring staff loft the designed road side line, and the side flat stone installation control point is tested along the line, the straight line segment point distance is 10m, the curve segment is not more than 5m, and the intersection is 1-5 m. And measuring the kerb inner edge line by using a total station at each position, and controlling elevation according to the design elevation of the kerb.

2. Pouring and tamping cushion layer

And (3) building an outer side template of the concrete cushion layer by adopting 50 x 100 battens, controlling the elevation of the cushion layer by using a level gauge, and pouring a side flat stone concrete cushion layer, wherein the cushion layer concrete adopts C10 fine stone concrete.

3. Side flat stone installation

(1) The slurry-setting method is uniformly adopted for construction, and before installation, the foundation is cleaned up and kept moist. During installation, the positions of the inner side marks of the curbstone are controlled, the heights of the top marks of the curbstone are controlled, and the flatness is controlled by a level bar. The adjacent side flat stone seams must be flush and close-joint construction.

(2) The arc section side flat stones of the intersection are processed by special shapes, and are stacked in a classified mode after being transported to the site, and the side flat stones are accurately installed according to the number during installation, so that smooth and attractive arc section curves of the side flat stones are ensured.

(3) After the installation of the side flat stone is completed, the side flat stone is required to be hung on a line for inspection, and the side flat stone is adjusted to be straight, smooth and even. The side pumice was inspected for level and elevation, every 20m, and should be readjusted when level and height were Cheng Chaoguo standard.

(4) Pointing joint

Before pointing, soil and sundries in the joints are removed, the joints are wetted by water, and then the special dry-hanging structural adhesive is used for filling the gaps of the opposite side flat stones and then pointing the joints. Excess mortar is removed by a soft broom, and proper watering and curing are carried out.

(5) Protection of finished products

And after acceptance inspection, covering with non-fading geotextile for watering maintenance, wherein the maintenance is not less than 3d, and the installation quality is ensured.

(6) Site cleaning

The concrete and the mortar are firstly unloaded on the iron sheet plate or the color strip cloth, and after the side flat stone is installed, the residual materials are removed in time, and the polluted site and pavement are cleaned.

The foregoing embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict. The protection scope of the invention is defined by the technical proposal of the claims, and the equivalent substitution of technical characteristics in the technical proposal of the claims is taken as the protection scope. I.e., equivalent replacement modifications within the scope of this patent are also within the scope of protection of the present invention.

Claims (4)

1. A pipe culvert protection construction method is characterized in that: the method comprises the following steps:

s1, construction preparation and measurement lofting, wherein the construction preparation comprises technical preparation and site preparation;

s2, erecting a pile foundation construction platform, wherein the concrete method comprises the following steps:

firstly, excavating earthwork until the position of a plane is confirmed at the bottom of a pipe;

then manufacturing the steel pipe pile and inserting and driving the steel pipe pile;

and finally, carrying out platform support system construction: firstly, pile top distribution beam construction is carried out, then longitudinal beams and transverse beams are sequentially paved above the pile top distribution beam, and finally a plurality of pattern steel plates are paved at equal intervals;

s3, pile foundation construction, wherein the concrete method is as follows:

s301, digging embedded holes, and burying steel pile casings, wherein the steel pile casings are buried between gaps of the pattern steel plates;

s302, positioning a pile driver and preparing slurry, wherein the concrete method comprises the following steps:

gradually moving the drilling machine to a construction hole site by utilizing the self power of the drilling machine and the rolling rod, and rechecking the pile position to ensure that the center of the drilling disc is consistent with the center of the pile;

when the drilling machine is installed in place, the base is tightly plugged by a sleeper pad, the top end of the base is stably fixed by a cable rope, and the perpendicularity of a drill rod of the machine head and the levelness of the frame platform are controlled;

before drilling, measuring the length of a drill rod and a drill bit, marking numbers on the drill rod and recording the lengths of all sections; rechecking the length of the drill rod before the drill rod is put down in drilling;

checking at regular time in the drilling process, keeping the level of the turntable surface and the vertical of the drilling machine frame, and keeping the perpendicularity and the aperture of the pile body;

s303, drilling holes through a pile driver;

s304, checking the quality of hole forming and cleaning holes of the drilled holes;

s305, manufacturing reinforcement cages in sections, hoisting reinforcement cages in sections, welding one section after each hoisting, and then hoisting the next section;

s306, performing catheter placement and secondary hole cleaning: the guide pipe is assembled beside the drilling hole in a segmented way in advance, and is assembled section by adopting screw thread connection during hanging; the position of the guide pipe is in the hole when the guide pipe is hung, the axis is straight, and the steel reinforcement framework is prevented from being blocked and hung and the hole wall is prevented from being collided when the guide pipe is lowered; the top of the guide pipe is provided with a funnel, and a chute, a storage hopper and a working platform are arranged above the funnel;

s307, pouring concrete, and detecting pile foundation after the concrete is formed into piles;

s4, dismantling a pile foundation construction platform:

the sequence of removing the pile foundation construction platform is opposite to that of the step S2, the pattern steel plate, the cross beam, the longitudinal beam and the pile top distribution beam are removed in sequence, and finally the steel pipe pile is removed;

s5, pier foundation construction, wherein the concrete method is as follows:

s501, pile head processing: after chiseling off the pile head of the bored pile, reserving the length of an embedded bearing platform with a fixed length;

s502, binding pier steel bars;

s503, mounting a pier template:

when the template is installed, the gap of the template joint is sealed and stuck through the double-sided adhesive tape, so that slurry leakage is prevented; the butt joint of the templates is reinforced and connected by screws, an upper opposite-pull screw rod and a lower opposite-pull screw rod are welded with the main ribs of the bearing platform, and the two sides of the middle part are through long;

s504, pouring pier concrete;

s505, removing the template and backfilling earthwork:

s6, construction of a pipe culvert structure, wherein the concrete method comprises the following steps:

s601, extruding plate construction;

s602, cushion layer construction, wherein the concrete method comprises the following steps:

firstly measuring and paying off, then installing a concrete cushion layer side template, pouring concrete, then manually leveling and vibrating and leveling by a flat vibrator, and finally manually harvesting and curing for 2-3 days;

s603, constructing reinforced concrete plates, wherein the concrete method comprises the following steps:

firstly, carrying out contact surface treatment, then carrying out reinforcement binding installation, then carrying out continuous expansion reinforcing band construction, carrying out template construction and concrete pouring after the completion of the construction, and completing the construction of the reinforced concrete slab after the completion of the concrete curing;

s604, constructing a road surface layer, which sequentially comprises water stabilization layer construction, penetrating layer construction, adhesive layer construction and asphalt surface layer construction;

s605, side flat stone construction, wherein the concrete method is as follows:

firstly, measuring and lofting, then, pouring and tamping a cushion layer, and finally, installing side flat stones.

2. The pipe culvert protection construction method according to claim 1, wherein in step S2, the manufacturing of the steel pipe pile and the inserting and driving of the steel pipe pile are performed, and the concrete method comprises the following steps:

s201, positioning a pile position center line by using a measuring instrument, and accurately positioning;

s202, before pile sinking, bolting a vibration pile hammer and the pile top of the steel pipe pile, and checking whether the vertical central lines of the vibration pile hammer and the pile top of the steel pipe pile are consistent; checking whether the pile position is correct or not, and checking whether the perpendicularity of the pile meets the specification or not;

s203, when the inspection is finished and meets the construction conditions, hanging the steel pipe pile, measuring the center deviation and the gradient of the steel pipe pile, adjusting, and quickly inserting the whole steel pipe pile after meeting the requirements;

s204, inserting and driving the steel pipe pile by using a vibration pile driving hammer after each deviation of the steel pipe pile meets the requirement; at the moment, the depth of the steel pipe pile to be buried is shallow, any unbalanced load or horizontal force is extremely easy to cause the inclination of the steel pipe pile, and the vibration pile hammer is constructed vertically downwards to ensure no eccentric force; when a vibration pile driving hammer begins to insert and drive a steel pipe pile, firstly, lightly driving 2-3 hammers, then checking and adjusting the plane position deviation and inclination of the steel pipe pile, and then gradually increasing the driving times and frequency; when the depth of the steel pipe pile to be buried reaches a preset depth, continuously sinking the pile;

s205, after the steel pipe pile is inserted and driven in place, the redundant pipe pile is cut off, a pile top steel plate is welded, a steel pipe pile scissor support and a pile top distribution beam are installed, and the scissor support and the distribution beam are firmly welded with the steel pipe pile.

3. The pipe culvert protection construction method according to claim 1, wherein in step S303, the specific method of drilling is as follows:

preparation before drilling:

after the drilling machine is in place, the drill bit is lifted and placed into the casing; starting a winch to hoist the turntable, laying square timber below the turntable base, leveling a drilling machine, aligning drilling holes, installing the turntable, and arranging the center of the turntable on the same plumb line with a hoisting pulley on a drilling frame; the turntable is checked regularly in the drilling process, and the turntable is corrected in time when inclination or displacement occurs;

drilling:

then, starting a winch, lifting the kelly bar to pass through the turntable and firmly connecting the kelly bar to a drill bit, and installing a square sleeve to clamp the kelly bar for ready drilling; the drilling is performed at a low speed when the drilling is started, and the drilling is performed at a low speed when the drilling enters the pile casing buried section, so that a slurry pointer is timely adjusted, and the quality of the pile casing is ensured; in the drilling process, respectively adjusting the speed and the mud specific gravity of different geological layers according to the soil property condition in the geological report so as to prevent hole collapse and hole shrinkage; if the topography or geology is found to be inconsistent with the provided data, timely connecting with a drilling and design unit;

lengthening the drill rod:

when the last drill rod is drilled, stopping rotating the turntable, starting the circulation system to continue to work until the sediment at the bottom of the hole is basically discharged, and then closing the extension drill rod of the slurry pump; a rubber ring is arranged between the joint flanges and the bolts are screwed for sealing; and (3) lengthening the drill rod in the working procedures, and continuing drilling after all the drill rods are normal.

4. The pipe culvert protection construction method according to claim 1, wherein in step S603, the method of continuous expansion reinforcing strip construction is as follows:

firstly, measuring and paying off, determining the position of an expansion reinforcing belt according to the designed position, then designing the reinforcing steel bars required to bind the expansion reinforcing belt, firstly, erecting vertical short reinforcing steel bars on two sides of the expansion reinforcing belt and binding and fixing the reinforcing steel bars, then hanging a dense-hole wire netting on the vertical short reinforcing steel bars to prevent stones in concrete from passing through, and finally pouring reinforcing belt concrete and curing.