CN100590261C

CN100590261C - Construction method for highway for load bearing vehicle

Info

Publication number: CN100590261C
Application number: CN200810054632A
Authority: CN
Inventors: 王衡
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-12
Filing date: 2008-03-12
Publication date: 2010-02-17
Anticipated expiration: 2028-03-12
Also published as: CN101245581A

Abstract

The invention relates to the field of the construction technology of expressways, in particular to a construction method of the expressways for bearing trucks, which solves the problems of the increasing maintenance cost of the existing highways caused by failure to bear heavy loading, frequent cracks and even collapses. The construction steps include that: a concrete bedding is cast by concrete with a strength degree between C80 and C100; before the rolling of each layer of the soil body roadbed, liquid flocculant with the concentration between 1per mill and 2 per mill are evenly sprayed on the surface of each layer of the soil body, wherein a kilogram of liquid flocculant per square meter is sprayed for the soil body surface; for the fabrication process of the asphalt layers, particles made by waste rubbers, dimethylbenzoyl, acrylonitrile, peroxidation dialkyl, hydroxymethyl cellulose, and fibers are added during the heating process of the asphalt. Since the three steps are combinedduring the construction, an excellent loading capacity is realized for the expressways and the running of overloading and overrunning vehicles are fulfilled. The construction method of the expresswaysfor bearing heavy trucks has the advantages of remarkably prolonging the service life of the expressways, reducing maintenance costs, and having a certain economic and social benefits.

Description

A kind of job practices of speedway of load bearing vehicle

Technical field

The present invention relates to the speedway technical field of construction, be specially a kind of job practices of speedway of load bearing vehicle.

Background technology

At present, develop rapidly along with national economy, the mileage of building of speedway also rapidly increases, but the thing followed also increases greatly for the maintenance cost of highway, trace it to its cause, mainly contain following two, the one, the magnitude of traffic flow rapid growth that the national economy develop rapidly brings, heavy-duty vehicle increases, particularly ubiquitous serious overload phenomenon, earlier damage frequently appears in the speedway that causes building in recent years, though country is for roadbed, the tonnage that the vehicle on road surface is passed through is limited to the 50-60 ton, but the tonnage of present carload partly has above hundred tons, this has increased pressure objectively for the maintenance work of China's speedway, and difficult heavy burden of the speedway of being built carried, and the major accident of ruining the road bridge cut-off occurs repeatedly; The 2nd, the strength grade of the concrete cushion of speedway is that the tonnage of the present vehicle of basis designs, be generally the C30-C40 grade, be difficult to meet the operation of overrun vehicle of overloading, must cause the road surface slight crack to occur even subside, and the soil body roadbed percentage of consolidation of existing highway is lower, is easy to take place lateral compression; Bitumen layer is subjected to the influence of difference variation bigger, and adhesive strength is lower, and these two reasons also can influence the supporting capacity of highway.

Summary of the invention

The present invention is carried in order to solve difficult heavy burden of existing speedway, phenomenons such as slight crack even landslide frequently occur, and causes the maintenance cost to increase greatly and influence the problem that normal traffic is transported, and a kind of job practices of speedway of load bearing vehicle is provided.

The present invention adopts following technical scheme to realize: a kind of job practices of speedway of load bearing vehicle, its construction sequence comprise, layered rolling soil body roadbed; On soil body roadbed, pour into a mould concrete cushion, after treating that intensity reaches designing requirement, asphalt layer successively on concrete cushion, skid resistant course, described concrete cushion is to be that the concrete pouring of C80-C100 forms by strength grade, this concrete prescription is as follows: Portland cement 450-510Kg, medium sand 580-600Kg, granite 1050-1221Kg, water 145-159Kg, composite concrete agent 50-108Kg, the consumption of above-mentioned each component can enlarge or dwindles according to the amount equal proportion of required concrete batching, and described composite concrete agent is this application people in the patent No. is disclosed prescription in 200610102246.5 the application documents.In the above-mentioned prescription, described Portland cement can be the cement of labels such as commercially available P.O425, P.O325, P.O525, and medium sand can be washing beans sieve sand of Xinzhou, Shanxi Province product, the granite stones that granite can be shown no increases in output for the Shanxi Province is former at least at least.The concrete that adopts prescription of the present invention to make, its strength grade can reach C80-C100, when laying the concrete cushion of speedway with this concrete, can improve the supporting capacity of highway greatly, increases the service life.

Concrete formulation of the present invention detects through the Shanxi Province Construction Science Institute, its compressive strength meets or exceeds the design strength grade, concrete testing result sees Appendix 1, name is called test report and the attached sheet that BR high performance concrete complexing agent is applied to high-strength concrete, high efficiency water reducing agent A in this annex, vulcanizing agent B, the mixture that strengthens superfine powder C are the prescription that the patent No. is a disclosed composite concrete agent in 200610102246.5 the application documents, the just prescription of composite concrete agent of the present invention.

Before rolling every layer soil body roadbed, evenly spray into concentration on every layer soil body surface and be 1 ‰-2 ‰ liquid flocculant, wherein every square metre of soil body surface is sprayed one kilogram of liquid flocculant, described flocculant can be buied from Chinese Academy of Sciences's chemistry institute at least, add water according to above-mentioned concentration then and be mixed with required liquid flocculant and get final product, its effect is percentage of consolidation, the supporting capacity that increases the soil body.

The manufacture craft of described bitumen layer is for to mix the following material that is equivalent to the pitch percentage by weight in pitch heating process: particle diameter is the particle 5-10% that the scrap rubber of 0.5-0.8cm is made, xyloyl 1.2-1.5%, acrylonitrile 1.8-2%, dialkyl 0.8-1.2%, CMC 1.3-1.6%, fiber 0.5-0.9%, after above-mentioned substance and pitch mixed, be laid on the concrete cushion, promptly form bitumen layer, it is less that this bitumen layer is influenced by difference variation, elasticity is bigger, and adhesion strength is better, is used with concrete cushion of the present invention and soil body roadbed, improved the supporting capacity on road surface greatly, increased the service life.Above material is existing known products, is commercially available.

Compared with prior art, the job practices of speedway of the present invention is mainly innovated from three aspects, and the one, in soil body roadbed, spray liquid flocculant; The 2nd, the employed strength grade of concrete of concrete cushion reaches C80-C100; The 3rd, in bitumen layer, add multiple modified material, the construction that cooperatively interacts of three aspects, make speedway have very strong supporting capacity, can satisfy the operation of various overload overrun vehicles, prolonged the application life of highway greatly, reduce the maintenance cost, had certain economic benefits and social benefit.

The specific embodiment

Embodiment 1:

A kind of job practices of speedway of load bearing vehicle, its construction sequence comprise, layered rolling soil body roadbed; On soil body roadbed, pour into a mould concrete cushion, after treating that intensity reaches designing requirement, asphalt layer, skid resistant course successively on concrete cushion, in the above-mentioned steps, before rolling every layer soil body roadbed, evenly spray into concentration on every layer soil body surface and be 1 ‰-2 ‰ liquid flocculant, wherein every square metre of soil body surface is sprayed one kilogram of liquid flocculant; Described concrete cushion is to be that the concrete pouring of C80-C100 forms by strength grade, and this concrete prescription is as follows: Portland cement 450Kg, medium sand 540Kg, granite 1050Kg, water 145Kg, composite concrete agent 50Kg; The manufacture craft of described bitumen layer is for to mix the following material that is equivalent to the pitch percentage by weight in pitch heating process: particle diameter is the particle 5% that the scrap rubber of 0.5cm is made, xyloyl 1.2%, acrylonitrile 1.8%, dialkyl 0.8%, CMC 1.3%, fiber 0.5% is after above-mentioned substance and pitch mixed, be laid on the concrete cushion, promptly form bitumen layer.Other job practices can adopt prior art such as the laying of skid resistant course and soil body roadbed, concrete cushion, the laying depth of bitumen layer, laying method.

Embodiment 2:

A kind of job practices of speedway of load bearing vehicle, its construction sequence comprise, layered rolling soil body roadbed; On soil body roadbed, pour into a mould concrete cushion, after treating that intensity reaches designing requirement, asphalt layer, skid resistant course successively on concrete cushion, in the above-mentioned steps, before rolling every layer soil body roadbed, evenly spray into concentration on every layer soil body surface and be 1 ‰-2 ‰ liquid flocculant, wherein every square metre of soil body surface is sprayed one kilogram of liquid flocculant; Described concrete cushion is to be that the concrete pouring of C80-C100 forms by strength grade, and this concrete prescription is as follows: Portland cement 510Kg, medium sand 600Kg, granite 1221Kg, water 159Kg, composite concrete agent 108Kg; The manufacture craft of described bitumen layer is for to mix the following material that is equivalent to the pitch percentage by weight in pitch heating process: particle diameter is the particle 10% that the scrap rubber of 0.8cm is made, xyloyl 1.5%, acrylonitrile 2%, dialkyl 1.2%, CMC 1.6%, fiber 0.9% is after above-mentioned substance and pitch mixed, be laid on the concrete cushion, promptly form bitumen layer.Other job practices can adopt prior art such as the laying of skid resistant course and soil body roadbed, concrete cushion, the laying depth of bitumen layer, laying method.

Embodiment 3:

A kind of job practices of speedway of load bearing vehicle, its construction sequence comprise, layered rolling soil body roadbed; On soil body roadbed, pour into a mould concrete cushion, after treating that intensity reaches designing requirement, asphalt layer, skid resistant course successively on concrete cushion, in the above-mentioned steps, before rolling every layer soil body roadbed, evenly spray into concentration on every layer soil body surface and be 1 ‰-2 ‰ liquid flocculant, wherein every square metre of soil body surface is sprayed one kilogram of liquid flocculant; Described concrete cushion is to be that the concrete pouring of C80-C100 forms by strength grade, and this concrete prescription is as follows: Portland cement 510Kg, medium sand 540Kg, granite 1097Kg, water 150Kg, composite concrete agent 108Kg; The manufacture craft of described bitumen layer is for to mix the following material that is equivalent to the pitch percentage by weight in pitch heating process: particle diameter is the particle 7% that the scrap rubber of 0.7cm is made, xyloyl 1.3%, acrylonitrile 1.9%, dialkyl 1.02%, CMC 1.4%, fiber 0.7% is after above-mentioned substance and pitch mixed, be laid on the concrete cushion, promptly form bitumen layer.Other job practices can adopt prior art such as the laying of skid resistant course and soil body roadbed, concrete cushion, the laying depth of bitumen layer, laying method.

Embodiment 4:

A kind of job practices of speedway of load bearing vehicle, its construction sequence comprise, layered rolling soil body roadbed; On soil body roadbed, pour into a mould concrete cushion, after treating that intensity reaches designing requirement, asphalt layer, skid resistant course successively on concrete cushion, in the above-mentioned steps, before rolling every layer soil body roadbed, evenly spray into concentration on every layer soil body surface and be 1 ‰-2 ‰ liquid flocculant, wherein every square metre of soil body surface is sprayed one kilogram of liquid flocculant; Described concrete cushion is to be that the concrete pouring of C80-C100 forms by strength grade, and this concrete prescription is as follows: Portland cement 500Kg, medium sand 580Kg, granite 1150Kg, water 155Kg, composite concrete agent 75Kg; The manufacture craft of described bitumen layer is for to mix the following material that is equivalent to the pitch percentage by weight in pitch heating process: particle diameter is the particle 9% that the scrap rubber of 0.6cm is made, xyloyl 1.4%, acrylonitrile 2%, dialkyl 0.95%, CMC 1.5%, fiber 0.8% is after above-mentioned substance and pitch mixed, be laid on the concrete cushion, promptly form bitumen layer.Other job practices can adopt prior art such as the laying of skid resistant course and soil body roadbed, concrete cushion, the laying depth of bitumen layer, laying method.

Embodiment 5:

A kind of job practices of speedway of load bearing vehicle, its construction sequence comprise, layered rolling soil body roadbed; On soil body roadbed, pour into a mould concrete cushion, after treating that intensity reaches designing requirement, asphalt layer, skid resistant course successively on concrete cushion, in the above-mentioned steps, before rolling every layer soil body roadbed, evenly spray into concentration on every layer soil body surface and be 1 ‰-2 ‰ liquid flocculant, wherein every square metre of soil body surface is sprayed one kilogram of liquid flocculant; Described concrete cushion is to be that the concrete pouring of C80-C100 forms by strength grade, and this concrete prescription is as follows: Portland cement 495Kg, medium sand 595Kg, granite 1195Kg, water 149Kg, composite concrete agent 90Kg; The manufacture craft of described bitumen layer is for to mix the following material that is equivalent to the pitch percentage by weight in pitch heating process: particle diameter is the particle 6% that the scrap rubber of 0.5cm is made, xyloyl 1.5%, acrylonitrile 1.85%, dialkyl 1.1%, CMC 1.45%, fiber 0.9% is after above-mentioned substance and pitch mixed, be laid on the concrete cushion, promptly form bitumen layer.Other job practices can adopt prior art such as the laying of skid resistant course and soil body roadbed, concrete cushion, the laying depth of bitumen layer, laying method.

Claims

1, a kind of job practices of speedway of load bearing vehicle, its construction sequence comprise, layered rolling soil body roadbed; On soil body roadbed, pour into a mould concrete cushion, after treating that intensity reaches designing requirement, asphalt layer, skid resistant course successively on concrete cushion, it is characterized in that described concrete cushion is is that the concrete pouring of C80-C100 forms by strength grade, this concrete prescription is as follows: Portland cement 450-510Kg, medium sand 540-600Kg, granite 1050-1221Kg, water 145-159Kg, composite concrete agent 50-108Kg; The manufacture craft of described bitumen layer is for to mix the following material that is equivalent to the pitch percentage by weight in pitch heating process: particle diameter is the particle 5-10% that the scrap rubber of 0.5-0.8cm is made, xyloyl 1.2-1.5%, acrylonitrile 1.8-2%, dialkyl 0.8-1.2%, CMC 1.3-1.6%, fiber 0.5-0.9% is after above-mentioned substance and pitch mixed, be laid on the concrete cushion, promptly form bitumen layer.

2, the job practices of the speedway of a kind of load bearing vehicle according to claim 1, before it is characterized in that rolling every layer soil body roadbed, evenly spray into concentration on every layer soil body surface and be 1 ‰-2 ‰ liquid flocculant, wherein every square metre of soil body surface is sprayed one kilogram of liquid flocculant.