Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point; A kind of special line for passenger trains double-block ballastless track bed board two-wire job practices is provided; Through reasonable arrangement construction speed, effectively utilize the respective stretch of formerly accomplishing construction, solve the logistical problem of ballastless track bed board construction; Guaranteeing efficiency of construction and construction quality, and reduce construction cost, reduce environment pollution.
Technical solution problem of the present invention adopts following technical scheme:
The characteristics of special line for passenger trains double-block ballastless track bed board two-wire job practices of the present invention are that the two-wire track is divided into a line and two wires, and with line construction in advance, the two wires lags behind line construction in the back; The sidewalk that parallels with circuit to build in the civil engineering construction under the line is a sidewalk under the line; One drawing lines bed board is that two wires bedding with road, the two wires bed board of not constructing as yet is as sidewalk on the line line; Road, two wires bed board is to be sidewalk on the line of two wires to accomplish the auxilliary trajectory of establishing of track; A said line and two wires form two streamlines of independently constructing; The changeover portion level crossing is being set between sidewalk and the circuit under the said line, is making the open to traffic of online and offline.
The characteristics of special line for passenger trains double-block ballastless track bed board two-wire job practices of the present invention also are:
Be used for that engineering material, circulation material, plant and concrete all transport through the two wires bedding as sidewalk on the line line under the line of line construction.
In the construction of said two wires; Two wires railway roadbed board concrete is after being transported to the changeover portion level crossing with rubber-tyred concrete transport vehicle through sidewalk under the said line, changes by rail-mounted concrete delivery truck to be transported to two wires railway roadbed board concrete and to build the scene through accomplishing the auxilliary trajectory of establishing of track again; Engineering material, the circulation material of road, two wires bed board is to be had bad luck and have enough to meet the need through accomplishing the auxilliary trajectory of establishing of track by rail-mounted flat bed transport vehicle.
The construction of a said drawing lines bed board is to adopt the manual work face; When 1000m length is accomplished in trajectory construction, the construction of beginning two wires; The mechanical work face is adopted in the construction of said two wires, and a line and two wires form two streamlines of independently constructing.
Compared with present technology, beneficial effect of the present invention is embodied in:
The difficult problem that pioneer road was built when 1, the present invention had at first solved mountain region, the construction of hilly ground double-block type ballastless track two-wire; Utilize the sidewalk of building in the civil engineering construction under the line parallel with circuit; And utilize the trajectory constructed and to have accomplished; Rationally arrange the construction speed of a line and two wires, efficiently solve the logistical problem of concrete in the construction, material, facility etc.
2, the present invention adopts the mode that manual work combines with mechanical work, has saved a series of expenses such as purchase commodity, usage charges, POL expense, maintenance expense of a large amount of plant equipment.
3, the present invention has been owing to reduced plant equipment, corresponding a large amount of consumption that reduce oil plant, thus reduced environment pollutions such as air, water and soil.
The specific embodiment
Practical implementation is that the two-wire track is divided into a line 1 and two wires 2, with line 1 construction in advance, lags behind a line 1 construction in the back with two wires 2; In the work progress, be sidewalk 3 under the line, the level crossing that sidewalk communicates with circuit under the line be set, make the open to traffic of line under reaching the standard grade at changeover portion with the sidewalk of building in the civil engineering construction under the line parallel with circuit;
Fig. 1, shown in Figure 2; Construct a drawing lines bed board with width greater than 7.0m, do not construct the two wires bedding 4 of road, two wires bed board as sidewalk on the line line as yet, engineering material, circulation material, plant and concrete transport with rubber-tyred concrete transport vehicle 5 through two wires bedding 4 under the line of line construction;
Shown in Figure 2; When constructing road, two wires bed board; Two wires railway roadbed board concrete is to be transported to after the level crossing through sidewalk 3 under the lines with rubber-tyred concrete transport vehicle 5, changes by rail-mounted concrete delivery truck 6 to be transported to two wires railway roadbed board concrete and to build the scene through accomplishing the auxilliary trajectory 1a who establishes of track again; Engineering material, the circulation material of road, two wires bed board is to be had bad luck and have enough to meet the need through accomplishing the auxilliary trajectory 1a that establishes of track by rail-mounted flat bed transport vehicle;
The construction of one drawing lines bed board is to adopt the manual work face; When 1000m length is accomplished in trajectory 1a construction, with a trajectory sidewalk on the line of two wires construction, the construction of beginning two wires; The mechanical work face is adopted in the two wires construction, and a line and two wires form two streamlines of independently constructing.
Work progress:
1, measures setting-out
Be equipped with two of Lycra TCRP1201 total powerstations, one of automatic compensated level, one of Tian Bao 0.3mm level precision level, 50 meters each 1 covers of invar tape.
One line sleeper location: per ten sleepers are emitted the sideline of railway roadbed reinforcing bar, per five sleepers emit one x wire as the sleeper center with reference to foundation.Loose and rest the head on the lateral separation that measures sleeper according to the baffle plate on the railway roadbed sleeper of having constructed in the two wires; And then the control fore-and-aft distance, just can generally be not more than 10mm so that the workload of coarse adjustment is very little; Can directly adopt fine-tuning machine to carry out coarse adjustment, can reduce by a coarse adjustment machine equipment.
2, the distribution of bottom longitudinal reinforcement
After the sideline bullet of reinforcing bar was good, the joint-cutting place isolated in strict accordance with requiring to cover geotextiles, and manual work is distributed to reinforcing bar on the supporting bed by the longitudinal reinforcement quantity.
The bridge section is laid geotextiles, installation resilient sleeper-bearing, colligation bottom layer of the reinforcing steel more earlier before this.
3, diffusing pillow
The one line pillow that looses adopts the artificial pillow that looses, and the rubber tyred gantry crane pillow that looses is adopted in the two wires.
4, the laying of instrument rail
One the Line tool rail adopts the automobile truck-mounted crane to carry out installation and removal, and the two wires adopts rubber tyred gantry crane to carry out the installation and removal of instrument rail.
5, adjustment supporting rack of screw pallet is installed
On the instrument rail, settling the supporting rack of screw pallet to carry out the height above rail surface regulates; Prevent the concentrated cracking that causes of supporting bed concrete stress; And entangle the screw rod top with plastic bushing; So that the screw rod on the bearing support can be back-outed behind concrete initial set smoothly, press the rail piece with the fastener fastening, make the flange of rail and the closely connected tight in supporting bridge joint face place.
6, section of track stull punching
In order to reinforce the whole section of track, prevent that the section of track from taking place laterally to move, every one steel rail adopts four pairs of stulls to carry out transversely strengthening after section of track accurate adjustment is accomplished.In order to prevent to punch disturbance accurate adjustment achievement too late, punching work must be accomplished before coarse adjustment.Punch position is advisable apart from the inboard 20cm of road bed board in railway roadbed.
7, coarse adjustment
One line adopts the method for setting-out location to improve the sleeper precision, utilizes the fine-tuning machine coarse adjustment.The position relation of the road bed board that can construct according to road, a two wires bed board and a line when pillow is loose in two wires construction is carried out sleeper roughly and is located, and makes coarse adjustment machine carry out coarse adjustment again.
8, screw regulator is installed
Coarse adjustment is tightened screw regulator after accomplishing immediately, makes it evenly stressed.
9, gauge adjustment
Because the design feature of double-block type sleeper, after the instrument rail was installed, all gauges all can dwindle, and the special-purpose gauge strut of field by using supports the instrument rail from web of the rail position, to reduce the error of gauge.
10, the layout of bottom, top reinforcement and colligation
After the section of track hoists and adjusts to design attitude, colligation bottom, top reinforcement.
11, vertical template is installed
The manual work face adopts truck-mounted crane to cooperate artificial mounting template, and the mechanical work face adopts special-purpose fitting machine to install.Template is installed and is carried out integrated ground and Insulation test work simultaneously.
12, accurate adjustment
Use total powerstation and track detection car that sleeper center line and elevation are adjusted; Be equipped with the TCR1201 high precision total station fine-tuning machine to be carried out the wireless transmission of rail level data on it; Cooperate manual work to utilize adjusting screw(rod) and box spanner to regulate again, until reaching designing requirement.
13, the section of track is reinforced
After section of track accurate adjustment is accomplished, the section of track is reinforced reliably, at last image data again., adjust individually again when defective like image data temporarily.
14, welding earth anchor reinforcing bar
The earth anchor reinforcing bar is φ 16 reinforcing bars of before coarse adjustment, imbedding supporting bed 15cm, and the earth anchor reinforcing bar begins to weld with sleeper bottom truss bars after image data, and welding must be firmly.Road, tunnel all carry out the anchoring setting by four pairs of dowels of every one steel rail, bridge Duan Bushe earth anchor reinforcing bar.
15, the cleaning of supporting bed, moistening
The concrete bearing layer is cleaned completely before the concreting, removes residual rubbish, earth, 2h sprinkles water moisteningly before perfusion then, cleans ponding before the perfusion.
16, concreting
After button-up operations is accomplished, sleeper protection box is installed and is begun concreting.One drawing lines bed construction concrete directly is transported to the job site pouring construction by sidewalk under the concrete delivery truck warp and two wires bedding; Concrete is after being transported to level crossing with rubber-tyred concrete transport vehicle through sidewalk under the line during construction of two wires railway roadbed, changes by rail-mounted concrete delivery truck to be transported to two wires railway roadbed board concrete and to build the scene through accomplishing the auxilliary trajectory of establishing of track again.Carry out concrete secondary when having bad luck, needing to use concrete elevator or concrete mixer to carry out the secondary entrucking.
17, loosen fastener, supporting rack of screw
Behind the concrete initial set, close on final set before, loosen each fastener and each supporting member.
18, the repetition measurement of road bed board
Be no less than after the railway roadbed board concrete is built two days, intensity reach design strength 50% after carry out repetition measurement, the repetition measurement content comprises section of track precision and railway roadbed board concrete absolute altitude, with the foundation as next step quality control.
19, concrete curing
Cover fully more than the watering maintenance fortnight with geotextiles immediately after the concrete final set, and then spray curing agent maintenance 16 days, all curing times, be limited to one month.Geotextiles keeps moistening during the covering curing, covering puts in place, concrete does not have exposed.
20, stripping
After the railway roadbed concrete strength reaches 5.0Mpa, begin to dismantle template and bearing support.Form removable manual work face adopts truck-mounted crane to cooperate manual work to remove, and the mechanical work face adopts the dismounting machine to remove summer.
21, removal tool rail
The dismounting of instrument rail adopts special 3t straddle truck to construct.
22, filling Screw rod bearings hole
After the non-fragment orbit construction was accomplished, unification was clogged Screw rod bearings hole on the road bed board, and choke material adopts the C40 non-shrink mortar.