A kind of Straddle type monorail support rail system and construction method thereof
Technical field
The present invention relates to a kind of Straddle type monorail support rail system and construction method thereof, belong to technical field of transportation.
Background technology
Along with movement of population and economic development, China urban traffic congestion is on the rise, and transport structure is single, the problems such as environmental effect is big are become increasingly conspicuous, and will solve these traffic problems at all, be necessary for adjusting existing transport structure form. And the Monorail PC Track Girders as medium-heavy road traffic has the advantages such as strong adaptability, noise is low, radius of turn is little, climbing capacity is strong, it is consistent with the traffic form of China's city demand, there is certain development prospect. Single track support rail form is generally overhead form, have that floor space is little, can make full use of the advantage such as city space, good visual effect, but overhead track girder span is less, basic and bridge pier quantity is more, quantities is big, cost is higher, it is therefore necessary to carry out technological improvement.
Summary of the invention
For solving the deficiencies in the prior art, it is an object of the invention to provide a kind of Straddle type monorail support rail system and construction method thereof, it is possible to while improving single-line railway beam span, effectively reduce overhead track girder, elevated structure bridge pier and basic material consumption.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that:
First the present invention discloses a kind of Straddle type monorail support rail system, including: roadbed body, the bottom layer of subgrade being layed on roadbed body, the bedding top layer being layed on bottom layer of subgrade, the pile being embedded in roadbed body and bottom layer of subgrade and be arranged at the bent cap on pile top, described bent cap is provided with track girder.
Preferably, aforementioned pile is steel-pipe pile, and described bent cap is made up of shaped steel.
It is highly preferred that aforementioned pile is concrete-pile, described bent cap is made up of armored concrete.
More preferably, the cross section of aforementioned roadbed body, bottom layer of subgrade and bedding top layer is trapezoidal.
Additionally, the invention also discloses the construction method of foregoing a kind of Straddle type monorail support rail system, being steel-pipe pile for pile, bent cap is the support rail system of shaped steel, comprises the steps:
S1, roadbed body fill: carry out construction survey, setting-out and build sidewalk, basic body place of first satisfying the need carries out transverse section overall with, longitudinal layered fills, complete one layer unload soil after, land leveller is coordinated to pave smooth to filling out paving with bull-dozer, then watering dry in the sun work is carried out, use vibrated roller compacting again, be finally by road surface, side slope re-shaping exercise;
S2, bottom layer of subgrade are constructed: the construction method that construction method is filled with roadbed body is identical;
S3, pile are constructed: directly squeezing into steel-pipe pile at roadbed body surface, and make pile top and the fixing connection of bent cap, described bent cap is that two shaped steel are connected and composed by Interal fixation;
S4, bedding top layer are constructed: the construction method that construction method is filled with roadbed body is identical;
S5, carrying out attachment rail beam on bent cap, described track girder is steel box-girder form.
And be concrete-pile for pile, bent cap is the support rail system of armored concrete, comprises the steps:
S1, roadbed body fill: carry out construction survey, setting-out and build sidewalk, basic body place of first satisfying the need carries out transverse section overall with, longitudinal layered fills, complete one layer unload soil after, land leveller is coordinated to pave smooth to filling out paving with bull-dozer, then watering dry in the sun work is carried out, use vibrated roller compacting again, be finally by road surface, side slope re-shaping exercise;
S2, bottom layer of subgrade are constructed: the construction method that construction method is filled with roadbed body is identical;
S3, pile are constructed: pile is concrete-pile, squeeze into steel pile casting, boring, descending reinforcing cage, build concrete-pile rod structure that diameter is 1.0m, reserved connect a batch reinforcing bar, at pile top cast-in-situ steel reinforced concrete bent cap;
S4, bedding top layer are constructed: the construction method that construction method is filled with roadbed body is identical;
S5, carrying out attachment rail beam on bent cap, described track girder is steel box-girder form.
The invention have benefit that: the Straddle type monorail support rail system of the present invention adopts the support rail system that roadbed body combines with pile, take full advantage of the supporting role of roadbed body between pile, the stress effect of road structure can be improved, compare existing overhead system track girder, while improving single-line railway beam span, effectively reduce overhead track girder, elevated structure bridge pier and basic material consumption, both structure stress had been improved, save again investment, there is significant Social benefit and economic benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of Straddle type monorail support rail system of the present invention.
The implication of accompanying drawing labelling in figure: 1, roadbed body, 2, bottom layer of subgrade, 3, pile, 4, bent cap, 5, bedding top layer, 6, track girder.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention done concrete introduction.
Referring to Fig. 1, the Straddle type monorail support rail system of the present invention includes: roadbed body 1, the bottom layer of subgrade 2 being layed on roadbed body 1, the bedding top layer 5 being layed on bottom layer of subgrade 2, the pile 3 being embedded in roadbed body 1 and bottom layer of subgrade 2 and be arranged at the bent cap 4 on pile 3 top, the cross section of roadbed body 1, bottom layer of subgrade 2 and bedding top layer 5 is trapezoidal, is provided with track girder 6 on bent cap 4. In practice of construction, pile 3 is steel-pipe pile or concrete-pile, and bent cap 4 is made up of shaped steel or armored concrete accordingly.
In order to implement the present invention better, also disclose the construction method of this Straddle type monorail support rail system, specifically include following steps:
S1, roadbed body 1 fill: carry out construction survey, setting-out and build sidewalk, basic body 1 place of first satisfying the need carries out transverse section overall with, longitudinal layered fills, complete one layer unload soil after, land leveller is coordinated to pave smooth to filling out paving with bull-dozer, then watering dry in the sun work is carried out, use vibrated roller compacting again, be finally by road surface, side slope re-shaping exercise; Inspect for acceptance by standard inspection after more than having worked, substandard to do up until qualified on request.
S2, bottom layer of subgrade 2 are constructed: the construction method that construction method is filled with roadbed body 1 is identical, are a difference in that bedding degree of compaction standard is higher;
S3, pile 3 are constructed: two schemes can be divided into construct, (1), direct steel-pipe pile of squeezing on roadbed body 1 surface, and make pile 3 top and the fixing connection of bent cap 4, and bent cap 4 is that two shaped steel are connected and composed by Interal fixation; (2), pile 3 be concrete-pile, squeeze into steel pile casting, boring, descending reinforcing cage, build concrete pile 3 structure that diameter is 1.0m, reserved connect a batch reinforcing bar, at pile 3 top cast-in-situ steel reinforced concrete bent cap 4;
S4, bedding top layer 5 are constructed: the construction method that construction method is filled with roadbed body 1 is identical;
S5, carrying out attachment rail beam 6 on bent cap 4, described track girder 6 is steel box-girder form.
To sum up, the Straddle type monorail support rail system of the present invention adopts the support rail system that roadbed body 1 combines with pile 3, take full advantage of the supporting role of 3 roadbed bodies 1 of pile, the stress effect of road structure can be improved, compare existing overhead system track girder 6, while improving single-line railway beam 6 span, effectively reduce overhead track girder 6, elevated structure bridge pier and basic material consumption, both improved structure stress, saved again investment, there is significant Social benefit and economic benefit.
The ultimate principle of the present invention, principal character and advantage have more than been shown and described. Skilled person will appreciate that of the industry, above-described embodiment does not limit the present invention in any form, and all employings are equal to the technical scheme that the mode of replacement or equivalent transformation obtains, and all fall within protection scope of the present invention.