CN112323548A - Tramcar municipal intersection bed board construction method - Google Patents

Abstract

The invention discloses a construction method of a tramcar municipal intersection bed board. The method comprises the following steps: prefabricating a track bed board, making a process test and determining process parameters; removing the road surface of the construction intersection, treating a substrate and embedding a comprehensive pipeline; firstly, roughly paving the prepared bed plate, and then finely adjusting; installing steel rails and fastening fittings on the precisely adjusted track bed plate; pouring a gap between the track slab and the foundation, and installing horizontal longitudinal and transverse shear plates to fix the adjacent track slab beds after pouring; finely adjusting the track on the track bed plate, and installing a track damping system; paving the excavated intersection, setting a sidewalk and recovering traffic. The invention realizes the fast construction of the intersection, improves the efficiency, shortens the construction period, reduces the labor input, the local large amount of traffic assistant personnel expenses and other unpredictable expenses, and saves the cost by about 80 percent compared with the prior factory type finished product process for introducing foreign technologies.

Description

Tramcar municipal intersection bed board construction method

Technical Field

The invention relates to the field of rail transit construction, in particular to a construction method of a tramcar municipal intersection bed board.

Background

Tramcars are a long-standing form of urban rail transit, and with the development of automobiles, old tramcars gradually disappear in cities due to the defects of high noise, low speed and the like. With the continuous development of new technology, the new urban tramcar is once more developed, a groove-shaped rail seamless line is laid in the center of a road, and the right of way shared by the rail seamless line and an automobile is the most international method at present.

The tramcar No. 1 line in the Cambodia area is a tramcar which is powered by a super capacitor and a lithium titanate battery for the first time in China, and meanwhile, a power supply control strategy is optimized, so that the problems that energy storage is insufficient in a long area, road conditions of a level crossing are variable, vehicle load is overlarge and the like are solved, and the high matching of a power supply system and a vehicle energy storage device is realized. The method adopts a semi-exclusive road right to level with the municipal road at the intersection of the road, and shares the road with the automobiles and pedestrians.

The traditional municipal road level crossing adopts cast-in-place construction, needs framing construction under the condition of not interrupting traffic, has long construction time, has large influence on urban traffic, brings great inconvenience to citizens, is positioned near residential areas of most crossings, cannot be constructed at night, and meets complaints and monitoring by hot wires for 24 hours by the captain. It is necessary to adjust the construction process.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

Aiming at the technical problems in the related art, the invention provides a tramcar municipal intersection bed plate construction method, which can solve the problems.

In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:

a construction method of a tramcar municipal intersection bed board is characterized by comprising the following steps:

s1: prefabricating a track bed board, making a process test and determining process parameters;

s2: removing the road surface of the construction intersection, treating a substrate and embedding a comprehensive pipeline;

s3: firstly, roughly paving the prepared bed plate, and then finely adjusting;

s4: installing steel rails and fastening fittings on the precisely adjusted track bed plate;

s5: pouring a gap between the track slab and the foundation, and installing horizontal longitudinal and transverse shear plates to fix the adjacent track slab beds after pouring;

s6: finely adjusting the track on the track bed plate, and installing a track damping system;

s7: paving the excavated intersection, setting a sidewalk and recovering traffic.

Further, the step S1 specifically includes:

building a prefabricated field, hardening the prefabricated field by adopting concrete, designing and prefabricating a ballast bed plate according to the form of a ballast bed of the engineering, and performing assembling trial and grouting test process tests after the strength of the ballast bed plate reaches 90%.

Further, the step S2 specifically includes:

s21 crossing pipeline investigation and migration; the existing related pipeline plan is utilized, an auxiliary geophysical prospecting instrument is used for detecting the pipeline at the intersection, and the pipeline needing to be moved is moved and changed in a small range after traffic guidance and change are carried out, so that the moving and change are completed in advance;

s22 pavement breaking and substrate processing; cutting by a pavement cutter, breaking the asphalt surface layer and the water-stable layer by adopting an excavator with a breaking hammer, when the pavement is broken, enabling the excavator and other transportation equipment to enter a field for matching, and loading and transporting water-stable muck and base treatment soil needing to be changed and filled;

s23 the comprehensive pipeline is pre-buried, the pipeline is transported to a construction site in advance, the pipeline is connected according to the length of the intersection and placed on two sides of the intersection for standby, after the unearthing is completed, an excavator is used for excavating a pipeline installation groove, after the groove is completed, the pipeline is installed, and when the pipeline is installed, the compactness of a substrate is ensured to prevent the pipeline from being crushed.

Further, the step S3 specifically includes:

s31, paving the bed boards roughly, hoisting each bed board by adopting a professional hoist, arranging 4 hoisting points on each bed board, placing 4 supporting square steels below each bed board to support the bed board when the bed board falls to the ground, and positioning the fine adjustment claws on the supporting square steels to enable the bed boards to be stressed uniformly and be adjustable in all directions;

s32, fine adjustment of the track bed board according to a CP III control network established on site, adjustment of the level of the track board is firstly performed, the level adjustment mainly performs elevation measurement on track supporting platforms at four corners of the track board, complete repeated measurement is performed after adjustment is completed, the center line of the track bed board is adjusted when the deviation value is smaller than 0.5mm, and adjustment of the track bed board is completed when the deviation value of the center line is smaller than 0.5 mm.

Further, the step S4 specifically includes:

and hoisting the steel rail by adopting a crane, installing buckle fittings after the steel rail enters the groove, re-measuring the elevation and the direction of the rail after the steel rail is installed, and performing fine adjustment on the plate which does not meet the requirement again by adopting a fine adjustment claw.

Further, the step S5 specifically includes:

s51, before pouring, the sealing condition of the formworks around the track bed slab should be checked, slurry leakage and basic engineering should not be polluted, the lower surface of the track bed slab should be sprayed and wetted before pouring, and no accumulated water is generated, during pouring, the flowing condition and pouring height of the grouting material under the track bed slab should be checked at any time through other pouring holes and slab joints, and the pouring height is aligned to the top surface of the track bed slab;

and S52 the connection between the slabs is carried out after the slab is installed and poured, and the slabs are connected by adopting horizontal longitudinal and transverse shear plates, so that the prefabricated integral slab can reach the design stress condition of the cast-in-situ integral slab.

Further, the step S6 specifically includes:

s61, after the grouting material is solidified and stabilized, fine adjustment of the track is carried out, wherein the fine adjustment mainly adjusts the track gauge, the track direction, the height, the level and the distortion of the track; the track fine adjustment is carried out by adopting a rail inspection trolley, a fine adjustment scheme is issued according to the measurement data after the measurement is finished, and the fine adjustment is carried out on site according to the fine adjustment scheme until the fine adjustment result meets the design requirement;

s62, installing a track damping system after fine adjustment is completed, wherein the crossing track damping system is composed of a rail waist damping material, rail top sealant, rail bottom isolation sleeve boots and the like; the rail web damping material is matched and closely attached with the 60R2 groove rail by adopting a bonding agent; the width of the rail top sealant on the working edge of the steel rail is not less than 40mm, and the thickness of the rail top sealant is not less than 20 mm; the width of the non-working edge of the steel rail is not less than 30mm, and the thickness of the non-working edge of the steel rail is not less than 20 mm.

Further, the step S7 specifically includes:

s71, road junction asphalt stirring and material preparation are carried out during fine adjustment and auxiliary construction of the steel rail, and after the installation of the track damping system is completed, a road junction asphalt pavement layer is laid and constructed according to design requirements;

s72 after asphalt paving is completed and cooling is performed to meet traffic conditions, a temporary sidewalk is arranged

S73, removing the two side enclosures and recovering the traffic.

The invention has the beneficial effects that:

1. the invention realizes the fast construction of the intersection, improves the efficiency, shortens the construction period, reduces the labor input, the local large amount of traffic assistant personnel expenses and other unpredictable expenses, and saves the cost by about 80 percent compared with the prior factory type finished product process for introducing foreign technologies.

2. The construction method has the advantages that the traditional process is adopted for construction, the framing construction is needed, the time is about 30 days, the construction time is about 60 hours, the construction period is greatly shortened, the road occupation construction time is shortened, and the occupation of social resources is saved. Can establish a good image for enterprises in society.

3. By adopting the construction method, the influence of long-time construction on the life of surrounding residents is effectively prevented, the construction noise, the construction raised dust and the damage of construction garbage to the natural environment are reduced, and the environmental benefit is remarkable.

4. The road bed boards are connected by longitudinal and transverse shear plates after being prefabricated and assembled, and the whole road junction is formed into a whole with good stability; grouting materials are adopted between the roadbed bed plate and the surface layer of the roadbed for grouting, so that the compactness is good, and the integral firmness is high;

5. because the intersection vehicle is very fast to rail wearing and tearing, and the bed board track mounting structure is the same with cast-in-place structure, and the maintenance can realize trading the rail fast in the operation later stage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a cross-sectional view of a prefabricated bed slab intersection;

FIG. 2 is a plan view of a prefabricated bed slab;

FIG. 3 is a schematic view of a horizontal cross-member shear plate;

FIG. 4 is a flow chart of the construction method of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

The tramcar No. 1 line in the Cambodia area starts with snow and ends with Yonghe and Xinfeng, the whole line of the line is about 14.3km, the length of a roadbed section is about 11.70km, the length of a bridge section is about 1.54km, the length of a tunnel penetrating downwards is about 1.06km, the average station spacing is about 0.75km, the maximum station spacing is about 1.2km, the tramcar No. 1 line is located from a northwest station to a big experimental school station in North China, and the minimum station spacing is 0.37km and is located from a snow station to a large street station. The total line has 20 stations, 19 stations are arranged in the near term, and 1 station of the ground station is reserved in the long term. A section is arranged on the whole line, the vehicle section occupies 6.58 hectares, and the parking lot occupies 3.25 hectares. The snow-fragrance road is adjacent to the local government, is the most main urban landscape road in development areas, and the daily traffic flow tends to be saturated in design, so that the snow-fragrance road is a necessary way for vast citizens to go out and go to the government center for affairs. The traffic flow monitoring data of the Guangzhou city traffic planning research institute is 1049 in the west direction and 608 in the east direction; the eight ways of the herb is that the peak hour is 792 from the west to the east and 755 from the east to the west. And the intersection of the fragrant snow road and the eight roads and the intersection of the fragrant snow road and the fragrant snow road are used as important crossroads, the traditional process construction is adopted, the influence on surrounding residents and traffic is large, and the safety risk is high.

And finally determining the construction process adopting the prefabrication and assembly by a project team through national tramcar construction survey, scheme comparison research and conference discussion according to actual conditions. And the comprehensive and systematic research is carried out on the prefabrication and assembly rapid construction technology of the urban tramcar municipal intersection, so that a 'prefabrication and assembly construction method of the urban tramcar municipal intersection' is formed.

7-2020 and 8-2020, the light iron I-line commander in the Cambodia area and the project department of the second engineering Limited company in Guangzhou Daokou and the Ministry of China and Federal group are scientifically organized and carefully managed in the construction process of the Xiangxue major track, Xiangxue eight track, and Xiangxue eight track, so that the construction is successfully applied, the construction fully utilizes the weekend time (originally planned 7 month 31, 19 points to 8 month 3, 7 points is completed within 60 hours, actually reached the traffic conditions at 8 month 3, 3 points to 8 month, 3, and the total time is 56 hours), the originally planned 7 month 24, 19 points to 7 month 27, 7 hours is completed within 60 hours, actually reached the traffic conditions at 7 month 26, 19 points to 7 month, and the total time is 48 hours), the construction is quickly completed, the influence on the urban resident life and the trip is reduced, the safety and quality accidents are not generated together during the construction period is greatly shortened, the method creates favorable conditions for smooth running-through of the first line of the tramcar in the area of the Fugu Huang and full-line traffic at the bottom of the year. Through the implementation verification of the engineering, the construction method has the advantages of advanced technology, controllable quality, safety guarantee, remarkable economic and social benefits and wide popularization and application prospect.

The concrete construction process is as follows:

first, preparation work

(1) Purchasing equipment and templates, building a prefabricating yard and prefabricating a track bed plate;

according to the determined design drawing, the prefabricating process is utilized, the on-site time is prepared and digested in advance, the prefabricating platform and the template are prepared in advance, prefabrication is carried out in advance, numbering is carried out after prefabrication is completed, and the prefabricated platform and the template are stored in a plate storage area.

The precast yard is arranged in the jade parking lot, is 50m long and 30m wide, and is hardened by 20cm of concrete.

The three paths of fragrant snow require 24 ballast plates, 12 transition plates at two sides, the eight paths of fragrant snow require 20 ballast plates and 10 transition plates at two sides. According to the field requirements, 8 sets of templates are configured on the track bed plate according to the size of 4.08 × 0.5 × 2.84m, 4 sets of templates are configured on the transition plates on two sides according to the size of 1.98 × 0.5 × 5.66m, the templates adopt customized templates, the thickness of the templates is not less than 6mm, the templates are prefabricated according to the railway ballastless track bed process, the strength and the precision of the prefabricated member of the crossing are ensured, slurry injection holes with the diameter of 150mm are reserved, and the plates are connected through shear plates so as to adjust, fill and integrally bear force during installation. And each track bed board is marked with a serial number according to the assembly position.

(2) Performing a precast yard process test, and determining various process parameters and construction methods;

the method comprises the following steps of simulating a standard filling surface of a filling material on site beside a prefabricating yard, and carrying out a process test (trial drilling) after the prefabricated member reaches 90% of the strength, wherein the main purposes of the process test are as follows:

firstly, mastering the technological process of the track bed slab prefabrication and assembly construction, and emphasizing on a construction method for solving key working procedures;

secondly, the fine adjustment and the process of the pavement slab laying construction are perfected;

mastering the grouting material preparation method and the grouting process;

forming mature and complete construction tools, machine tools and equipment and labor allocation;

solving the key and difficult problems existing in the pavement slab laying process;

sixthly, adjusting the construction mixture ratio of the grouting material;

and seventhly, constructors are trained, construction teams are exercised, and proficiency of workers is improved.

(3) A process test flow;

firstly, hoisting a road bed board;

secondly, paving a road bed plate;

coarse adjustment of the track slab;

fourthly, fine adjustment of the ballast bed plate;

installing steel rails and fasteners;

sixthly, grouting material pouring construction;

and seventhly, grouting and plate uncovering tests.

(4) Determining technical parameters and a construction process;

and determining and compiling operation instruction books such as installation process, elements, related cautions, related error values and other technical parameters according to the test condition, and ensuring the success of the site at one time.

Second, survey, migration and modification of crossing pipeline

(1) Intersection pipeline survey and moving and changing

The existing related pipeline plan is utilized, an auxiliary geophysical prospecting instrument is used for detecting the pipeline at the intersection, and the pipeline needing to be moved is moved and changed in a small range after traffic guidance and change are carried out, so that the moving and the change are completed in advance.

(2) Traffic containment and relief

The short waterways are utilized to simply enclose the range of the central rail-mounted area of the intersection (the enclosing range is determined according to the construction range), and the vertical traffic of the intersection and the rail-mounted area is closed. Traffic dispersion personnel are arranged at each intersection around the enclosure to assist in directing traffic, vehicles are guided to bypass in advance, and congestion is prevented.

Thirdly, pavement breaking

(1) Preparation of cutting apparatus

In order to ensure that the existing asphalt pavement is not disturbed when being broken, the excavated part of the road junction needs to be lofted and scribed in advance, a road surface cutting machine is adopted for cutting, and the specific quantity is determined according to the length of the road junction. The area of each fragrant and snow three-way intersection needs to be about 460 square meters, and 3-4 cutting devices are needed. The area of the intersection with the fragrance and snow needs to be about 330 square meters, and 2-3 cutting devices are needed.

(2) Preparation of the demolition apparatus

The asphalt surface layer and the water stabilization layer are broken by a 200-type excavator with breaking hammers, and the specific quantity is determined according to the area of the intersection. The area of the fragrant snow three-way intersection needs to be broken by about 460 square meters, and 4-5 crushing hammers are needed for a digging machine with more than 200 squares. The area of the intersection with the fragrance and snow is about 330 square meters, and more than 200 square meters with 3-4 breaking hammers are needed.

(3) Excavation and transport equipment preparation

When the road surface is broken, the excavator and other transportation equipment enter the field to be matched, and water is loaded and the residue soil is stabilized and the foundation to be filled is changed to treat the soil. And carrying out bearing capacity test after excavating to the designed elevation. And (3) excavating about 800m3 at the three-way intersection of the fragrant snow, and using the excavator with the breaking hammer to meet the excavation requirement. The area of the sweet and snow road junction needs to be about 570m3, and the digging requirement is met by using the digging machine with the breaking hammer at the position.

(4) Refill and inspection equipment preparation

In order to save time, relevant test detection equipment, required filling materials, rolling and leveling equipment are put into the field in advance, and after the bearing capacity is detected to be qualified, layered filling is carried out according to the standard requirement. The flatness control of small-area filling is the first key link for quickly assembling the road bed plate, and the design elevation and the flatness are the core of quick working procedures.

Four, comprehensive pipeline installation

The pipelines are transported to a construction site in advance, connected according to the length requirement of the intersection and placed on two sides of the intersection for standby.

After the unearthing is finished, an excavator is used for excavating a pipeline installation groove, after the groove is finished, a pipeline is installed, and the compactness of a substrate must be ensured when the pipeline is installed so as to prevent the pipeline from being crushed.

Treating the substrate

Carrying out foundation treatment according to the design condition, wherein the foundation treatment adopts sand replacement and filling sand inclusion broken stones (0.6 m) and water stabilizing materials (0.4 m).

(1) Sand-filled gravel filling process

The foundation treatment sand-filled gravel filling is divided into three layers for filling and compaction, and the loose paving coefficient of the thickness is considered when the materials are paved. And filling sand with broken stones after the bearing capacity of the foundation is detected to be qualified, filling and detecting according to a normal process, detecting according to design requirements after each layer of filling is finished, and loading and transporting materials to the site to wait for filling in a second cycle when each layer of compaction and test detection are carried out.

(2) Water-stabilizing material filling process

The surface water stable material filling is divided into two layers for filling and compacting, and the loose coefficient of the thickness is considered when the material is spread. During each layer of compaction and test detection, the second cycle begins to load materials to the site for filling.

Sixthly, measurement lofting

And (3) detecting the filling flatness after the filling of the surface layer of the foundation bed is finished, and detecting by using a flatness detector (the flatness requires 10mm/3 m). And after the flatness meets the requirement, performing construction lofting on the track slab, and releasing the accurate positions of the center line of each track and the track bed slab and clearly marking.

Seven, way bed board is spread roughly

(1) Road bed board transportation

A100T crane and 8 flat plate transport vehicles are prepared in a prefabricating yard, loading is carried out in advance for half a day, track slabs are transported to the site to wait when a water stable layer is filled, and hoisting is carried out after lofting to be measured is completed.

(2) Road bed board hoisting and rough paving

And determining the models and the number of hoisted cranes according to the field situation, and preparing for entering the field in advance. The three-way intersection of the fragrant snow adopts two 160T automobile cranes which are arranged on the same side of the line. The eight-road intersection with fragrant snow adopts two 160T automobile cranes on each side of the road.

And the hoisting is carried out by adopting a truck crane to hoist at four points in place, and whether the hoisting rope, the fixture and the lifting lug are complete and effective or not is checked before hoisting. The steel wire rope used by the hanging plate has enough safety factor, the steel wire rope has no dead bend and no oil, the number of broken wires in any one section is not more than 5% of the total number of the section, when the connector is spliced, the splicing length is not less than 20 times of the diameter of the steel wire rope, the total length is not less than 300mm, the steel wire rope cannot be used when the defect of affecting the bearing capacity exists, and the steel wire rope can be immediately replaced.

The road bed plate is hoisted by adopting a special sling, and an operator needs to regularly check hoisting equipment and machines (such as whether a hoisting nut is bent, cracked or slippery, whether a hoisting steel wire rope is broken or seriously abraded, whether the mechanical performance of the hoisting equipment is guaranteed, and the like).

Lifting lugs of the lifting road bed plate are additionally provided with rubber pads with the thickness of 3-5 mm, and lifting bolts are fully screwed down before lifting work can be started.

The slab body must be kept horizontal and the lifting of the road bed slab is carried out slowly. In the hoisting process, an operator has to hold the plate body so as to conveniently master the running direction of the track plate, reduce the shaking of the track plate and avoid collision.

The lifting of the ballast bed plate must be uniformly directed and lifted by a specially-assigned person, and the field constructors cannot operate the ballast bed plate randomly. When the track slab is hoisted, the track slab must be slowly transferred, so that damage caused by rapid transfer is prevented.

The center line of the track slab is marked by a marker pen before the track slab is laid. And drawing an installation sequence chart (taking the intersection center as the starting point of the first installation center) before the rough paving.

After the road bed plate is hung on a lifting hook according to the specification, the road bed plate is operated by a crane driver to lift. The bed plate to be paved is hoisted to the position to be paved and slowly descended under the command of the commander. The lowering speed must be controlled to prevent damage to the track plate when approaching the support layer.

When the bed is put down, an operator accurately positions the bed plate by using hands and a wooden crowbar (hard wood for preventing the bed plate from being damaged). At the moment, the plane position is particularly noticed, and the center line of the standard track bed plate is coincided with the center line of the line during positioning.

4 supporting square steels are placed below each track bed plate to support the track bed plate, and the fine adjustment claws are positioned on the supporting square steels to enable the supporting square steels to be evenly stressed and can be adjusted in all directions.

And installing a fine tuning claw. The fine tuning claw is lubricated to relevant parts before being used, then the fine tuning claw is installed at the position of hoisting holes on the left side and the right side of each plate to be tuned, 4 fine tuning claws are installed on each plate, and after the installation of the fine tuning claws is completed, the fine tuning claws are heightened by using a fine tuning wrench. The fine tuning claw should be placed in the middle with the horizontal axostylus axostyle before the installation, all has half adjustment volume about making it to horizontal adjustment volume is not enough when avoiding the fine tuning. And after the installation is finished, the track bed plate is roughly adjusted by using the fine adjusting claw according to the measuring line boundary and the position of the previously installed track bed plate.

When the track bed plate is paved coarsely, the transverse position deviation is specially noticed, the transverse direction is not larger than 1/2 of the transverse adjustment range of the fine adjustment claw, and the height is about 5-10mm lower than the design height.

Eight, fine adjustment of ballast bed plate

The track bed plate is precisely adjusted and provided with a measuring instrument 1 set. The precision of the total station is required to meet the requirement, and the total station needs to be erected on a forced centering tripod with an adjustable screw (the height of the tripod needs to be precisely calibrated before leaving a factory).

The thermometer reading is accurate to 0.5 deg.C and the barometer reading is accurate to 0.5 hPa.

The total station needs to be certified by a legal certification authority and is in the valid period of a certification certificate, and during distance or coordinate measurement, meteorological correction is needed.

After the coarse adjustment is finished, the measuring team finely adjusts the ballast bed plate according to a CP III control network established on site. Firstly, adjusting the level of a track slab, wherein the level adjustment mainly carries out elevation measurement on track bearing platforms at four corners of the track slab, complete repeated measurement is carried out after the adjustment is finished, the center line of a track bed board is adjusted when the deviation value is less than 0.5mm, the adjustment of the track bed board is finished when the deviation value of the center line is less than 0.5mm, fine adjustment results are stored, the adjustment of the next track bed board is shifted, and the above work is repeated.

Note that: and (4) checking the rough paving precision again before fine adjustment, adjusting the track slab with obvious deviation to a certain precision range, and then measuring and adjusting.

Ninth, mounting rail and fastener

The steel rail is welded into a long rail in advance by thermite welding (according to the length of the intersection), the length of the fragrant and snow three-way intersection is 37m, the length of the steel rail is 50m (two rails are welded), the length of the fragrant and snow eight-way intersection is 26m, the steel rail adopts a single rail of 40m and is stored at one side of the intersection. The steel rail is hoisted by a crane, after the steel rail enters the groove, the fastener is installed, the elevation and the direction of the rail are measured again after the steel rail is installed, the plate which does not meet the requirements is finely adjusted again by the fine adjustment claw, and the grouting material pouring construction of the bed board of the rail is carried out after the fine adjustment meets the requirements of laying the rail.

Ten-step road bed plate pouring construction

And (4) making inspection work of material entering the field by grouting material entering the field, and ensuring that qualified raw materials are used for construction. The raw materials must be tested and reported when entering the field, and the qualification must be issued when the raw materials have the delivery qualification. The raw materials are reasonably stored according to the performance and the application and are clearly marked.

And (3) mixing the grouting material by adopting a forced mixer, and strictly mixing according to the material mixing ratio.

Before grouting material pouring construction, a test is carried out during pre-assembly, and after various parameters meet requirements, on-site grouting construction is carried out.

The grouting thickness is 5-7 cm, the sealing condition of the templates around the road bed plate is checked before grouting, slurry leakage is avoided, and foundation engineering is not polluted. Before perfusion, the lower part of the ballast bed plate should be sprayed and moistened, and no water accumulation is generated. The grouting material is observed through other grouting holes and slab joints during grouting, the flowing condition and the grouting height of the grouting material under the ballast bed slab are checked at any time, and the grouting height is aligned to be flush with the top surface of the ballast bed slab.

After the pouring is finished, the excess concrete in the pouring hole is removed in time, and the gap between the two plates is also blocked by adopting a grouting material.

And after the grouting material is solidified stably, removing the end molds and the fine adjustment claws at the two sides, and installing the transition plates at the other line and the two sides.

After the transition plates on the two sides are installed, gaps between the transition plates and the road are filled with C50 early-strength concrete.

Eleven, shear plate installation

The horizontal shear plates are constructed as shown in figure 3, the connection between the plates is carried out after the ballast bed plates are installed and poured, the plates are connected by adopting horizontal longitudinal and transverse shear plates, and the shear plate bolts must be ensured to be fastened.

Twelve, fine adjustment of orbit

After the grouting material is solidified and stabilized, the track fine adjustment can be carried out, and the fine adjustment mainly adjusts the track gauge, the track direction, the height, the level, the distortion and the like of the track.

The track fine adjustment is firstly carried out by adopting a rail inspection trolley, a fine adjustment scheme is issued according to measurement data after the measurement is finished, and the fine adjustment is carried out on site according to the fine adjustment scheme. And after the fine adjustment for one time is finished, measuring by using a rail inspection trolley, if various parameters meet the design requirements, finishing the fine adjustment, and if the various parameters do not meet the design requirements, performing the fine adjustment for the second time and the third time again until the fine adjustment result meets the design requirements, and finishing.

Thirteen, track damping system installation

And installing a track damping system after fine adjustment is finished, wherein the crossing track damping system is composed of a rail waist damping material, rail top sealant, a rail bottom isolation sleeve boot and the like.

The rail web damping material is matched and closely attached with the 60R2 groove rail by adopting an adhesive. The width of the rail top sealant on the working edge of the steel rail is not less than 40mm, and the thickness of the rail top sealant is not less than 20 mm; the width of the non-working edge of the steel rail is not less than 30mm, and the thickness of the non-working edge of the steel rail is not less than 20 mm.

Fourteen, paving at road junction and recovering traffic

Road junction asphalt stirring and material preparation are carried out during fine adjustment and auxiliary construction of the steel rail, and after the track damping system is installed, a road junction asphalt pavement layer is paved, wherein 7cm medium grain type modified asphalt concrete and 4cm fine grain type modified asphalt concrete are adopted in the asphalt pavement layer.

The construction of the asphalt pavement base layer must spray permeable asphalt, and the asphalt pavement interlayer must spray adhesive layer oil.

And (5) after the asphalt is paved and cold cut is finished to meet the traffic conditions, removing the enclosure at the two sides and recovering the traffic.

According to the construction method, the original cast-in-place road bed board of the tramcar intersection is adjusted to be prefabricated and spliced, the horizontal shear plates are longitudinally and transversely connected with each other, the road bed board and the base are filled with grouting materials densely, the field construction period is greatly shortened under the condition that the quality and the overall stability of the intersection are ensured, the pressure on urban traffic and the influence on citizens' traveling are reduced, the influence on the environment is reduced, and the consistent praise of units such as society, government, owner and design is obtained. The economic benefit is 150 ten thousand yuan.

The construction method has the advantages of short construction period, high operation efficiency, less environmental pollution, cost reduction and obvious economic and social benefits, and creates greater social and economic benefits for Guangzhou tramcar projects and even national tramcar construction.

1. Economic benefits

Through the research of the construction method, the urban tramcar intersection bed board prefabrication and assembly construction technology is formed, the intersection is quickly constructed, the efficiency is improved, the construction period is shortened, the labor input is reduced, the cost of a large number of local traffic assistant personnel and other unpredictable cost are reduced, and the economic benefit of a single intersection is reduced by 75 ten thousand yuan.

2. Social benefits

The Cambodia district Xiangxue avenue is used as a Cambodia district landscape avenue, district governments and various functional departments are distributed on two sides of the avenue, the number of surrounding residents is large, the traffic flow is large, and the traffic flow is in a road design saturation state all the year round. The traffic flow monitoring data of the Guangzhou city traffic planning research institute is 1049 in the west direction and 608 in the east direction; the eight ways of the herb is that the peak hour is 792 from the west to the east and 755 from the east to the west.

The Xiangxue Dadao-Bayue crossroads (33 m, the line spacing is 3.8 m) and Xiangxue Dayue-Xiangxue three-way crossroads (35 m, the line spacing is 4.1 m) are crossroads and are positioned in important sections of the Xiangxue Dayue crossroads, the traditional process construction is adopted, the framing construction is required, the time is about 30 days, the construction is carried out by adopting the construction method, about 56 hours are totally needed, the construction period is greatly reduced, the running and traffic influence of citizens is reduced, the advancement of the construction method is fully embodied, the project smoothly completes the construction tasks of the two crossings in advance, and the project is commented by the consistency of society, government and functional departments thereof, project implementation mechanisms, design and supervision.

Through the research and application of the achievements of the construction method, the blank of the group company and the two companies in the field of rapid construction of tram municipal intersections is created, a batch of construction professional technical talents are cultured, the talent reserve of the group company is increased, and the stable improvement of the technological level of the group company is powerfully promoted.

3. Environmental benefits

By adopting the construction method, the influence of long-time construction on the life of surrounding residents is effectively prevented, the construction noise, the construction raised dust and the damage of construction garbage to the natural environment are reduced, and the environmental benefit is remarkable.

The smooth construction of the tramcar one-number line in the Cambodicar area plays a good role in promoting the economic construction of the surrounding area and improving the surrounding traffic environment, and particularly, the rapid construction completion of the intersection lays a solid foundation for the smooth construction completion of the tramcar.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. A construction method of a tramcar municipal intersection bed board is characterized by comprising the following steps:

s1: prefabricating a track bed board, making a process test and determining process parameters;

s2: removing the road surface of the construction intersection, treating a substrate and embedding a comprehensive pipeline;

s3: firstly, roughly paving the prepared bed plate, and then finely adjusting;

s4: installing steel rails and fastening fittings on the precisely adjusted track bed plate;

s5: pouring a gap between the track slab and the foundation, and installing horizontal longitudinal and transverse shear plates to fix the adjacent track slab beds after pouring;

s6: finely adjusting the track on the track bed plate, and installing a track damping system;

s7: paving the excavated intersection, setting a sidewalk and recovering traffic.

2. The tram town intersection bed board construction method as claimed in claim 1, wherein the step S1 specifically comprises:

building a prefabricated field, hardening the prefabricated field by adopting concrete, designing and prefabricating a ballast bed plate according to the form of a ballast bed of the engineering, and performing assembling trial and grouting test process tests after the strength of the ballast bed plate reaches 90%.

3. The tram town intersection bed board construction method as claimed in claim 1, wherein the step S2 specifically comprises:

s21 crossing pipeline investigation and migration; the existing related pipeline plan is utilized, an auxiliary geophysical prospecting instrument is used for detecting the pipeline at the intersection, and the pipeline needing to be moved is moved and changed in a small range after traffic guidance and change are carried out, so that the moving and change are completed in advance;

s22 pavement breaking and substrate processing; cutting by a pavement cutter, breaking the asphalt surface layer and the water-stable layer by adopting an excavator with a breaking hammer, when the pavement is broken, enabling the excavator and other transportation equipment to enter a field for matching, and loading and transporting water-stable muck and base treatment soil needing to be changed and filled;

s23 the comprehensive pipeline is pre-buried, the pipeline is transported to a construction site in advance, the pipeline is connected according to the length of the intersection and placed on two sides of the intersection for standby, after the unearthing is completed, an excavator is used for excavating a pipeline installation groove, after the groove is completed, the pipeline is installed, and when the pipeline is installed, the compactness of a substrate is ensured to prevent the pipeline from being crushed.

4. The tram town intersection bed board construction method as claimed in claim 1, wherein the step S3 specifically comprises:

s31, paving the bed boards roughly, hoisting each bed board by adopting a professional hoist, arranging 4 hoisting points on each bed board, placing 4 supporting square steels below each bed board to support the bed board when the bed board falls to the ground, and positioning the fine adjustment claws on the supporting square steels to enable the bed boards to be stressed uniformly and be adjustable in all directions;

s32, fine adjustment of the track bed board according to a CP III control network established on site, adjustment of the level of the track board is firstly performed, the level adjustment mainly performs elevation measurement on track supporting platforms at four corners of the track board, complete repeated measurement is performed after adjustment is completed, the center line of the track bed board is adjusted when the deviation value is smaller than 0.5mm, and adjustment of the track bed board is completed when the deviation value of the center line is smaller than 0.5 mm.

5. The tram town intersection bed board construction method as claimed in claim 1, wherein the step S4 specifically comprises:

and hoisting the steel rail by adopting a crane, installing buckle fittings after the steel rail enters the groove, re-measuring the elevation and the direction of the rail after the steel rail is installed, and performing fine adjustment on the plate which does not meet the requirement again by adopting a fine adjustment claw.

6. The tram town intersection bed board construction method as claimed in claim 1, wherein the step S5 specifically comprises:

s51, before pouring, the sealing condition of the formworks around the track bed slab should be checked, slurry leakage and basic engineering should not be polluted, the lower surface of the track bed slab should be sprayed and wetted before pouring, and no accumulated water is generated, during pouring, the flowing condition and pouring height of the grouting material under the track bed slab should be checked at any time through other pouring holes and slab joints, and the pouring height is aligned to the top surface of the track bed slab;

and S52 the connection between the slabs is carried out after the slab is installed and poured, and the slabs are connected by adopting horizontal longitudinal and transverse shear plates, so that the prefabricated integral slab can reach the design stress condition of the cast-in-situ integral slab.

7. The tram town intersection bed board construction method as claimed in claim 1, wherein the step S6 specifically comprises:

s61, after the grouting material is solidified and stabilized, fine adjustment of the track is carried out, wherein the fine adjustment mainly adjusts the track gauge, the track direction, the height, the level and the distortion of the track; the track fine adjustment is carried out by adopting a rail inspection trolley, a fine adjustment scheme is issued according to the measurement data after the measurement is finished, and the fine adjustment is carried out on site according to the fine adjustment scheme until the fine adjustment result meets the design requirement;

s62, installing a track damping system after fine adjustment is completed, wherein the crossing track damping system is composed of a rail waist damping material, rail top sealant, rail bottom isolation sleeve boots and the like; the rail web damping material is matched and closely attached with the 60R2 groove rail by adopting a bonding agent; the width of the rail top sealant on the working edge of the steel rail is not less than 40mm, and the thickness of the rail top sealant is not less than 20 mm; the width of the non-working edge of the steel rail is not less than 30mm, and the thickness of the non-working edge of the steel rail is not less than 20 mm.

8. The tram town intersection bed board construction method as claimed in claim 1, wherein the step S7 specifically comprises:

s71, road junction asphalt stirring and material preparation are carried out during fine adjustment and auxiliary construction of the steel rail, and after the installation of the track damping system is completed, a road junction asphalt pavement layer is laid and constructed according to design requirements;

s72 after asphalt paving is completed and cooling is performed to meet traffic conditions, a temporary sidewalk is arranged

S73, removing the two side enclosures and recovering the traffic.

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