CN102704363A

CN102704363A - Integrated roadbed and pavement project based on steel slag

Info

Publication number: CN102704363A
Application number: CN2012101978296A
Authority: CN
Inventors: 李伟; 张晓铭
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2011-10-24
Filing date: 2012-06-15
Publication date: 2012-10-03

Abstract

The invention discloses an integrated roadbed and pavement project based on steel slag. The waste steel slag is used as a main material; a soft soil roadbed is reinforced by adopting a stirring compaction mode of the waste steel slag and field soil; a pavement is divided into four layers; the roadbed can be reinforced by adopting the stirring compaction mode of the untreated waste steel slag and the field soil during foundation treatment, or the roadbed can be reinforced by adopting the stirring compaction mode of crushed waste steel slag serving as a main component, a small amount of cement, lime and the like and the field soil during foundation treatment; and the pavement is made of a mixture of the steel slag and asphalt. According to different geological conditions, the roadbed can be treated in a form of (1) pure shallow roadbed treatment, (2) shallow layer and wall type combined concave roadbed treatment or (3) shallow layer, wall type and column combined treatment, so that the bearing capacity and the deformation resistance of the roadbed are improved. Through the project, mechanical property proximity between layers is realized, the overall affinity between the layers is improved, and aims of protecting environment and saving resources are fulfilled.

Description

Integrated subgrade and pavement engineering based on slag

Technical field

The present invention relates to the subgrade and pavement field of engineering technology, particularly relate to and a kind ofly handle the subgrade and pavement of material, pitch and rigid pavement blended materials as roadbed, realize one subgrade and pavement engineering based on steel slag with steel slag.

Background technology

Deepen continuously along with what recycling economy was familiar with, useless admittedly comprehensive utilization of resources is changed into building material has become the new focus of making ecocity.With industrial steel slag, industrial solid castoffs such as CHARACTERISTICS OF TAILINGS SAND and flyash are that raw material is applied to field of civil engineering, can fully save resource on the one hand, safeguard natural environment, can bring the remarkable economical effect simultaneously.With the building block of steel slag as the building stock, the making research aspect of brick etc. has obtained certain development, and Preliminary Applications is in construction work.

For mineral composition, physicochemical property and the basic mechanical characteristic thereof of steel slag, domestic and international many scholars have carried out big quantity research, have obtained a large amount of achievements in research simultaneously.In the utilization again for industrial steel slag, such as developed countries such as the Japanese U.S., steel slag fully is applied in the engineering construction, and its rate of recovery reaches 100% basically.And have only in the recycling of China for steel slag about external half, the research degree of depth and range are not enough, and the resource loss ratio is still not little.

The present invention is in line with the principle of resource circulation utilization, and in conjunction with the seemingly cement characteristics of slag, multipath exploitation ground is handled and the highway construction application form.

Summary of the invention

The object of the invention be to provide a kind of with steel slag carry out as stock that roadbed is handled and be the novel pavement of aggregate with the steel slag based on the integrated subgrade and pavement engineering of slag-.According to the mechanical property of steel slag, handle material with steel slag as roadbed, the weak soil layer of road bottom is carried out integral body or local ground is handled, improve the bearing capacity of roadbed, keep the long-term functional performance of road.Simultaneously, shown in accompanying drawing 1, each layer of road all adopts slag as main material, realizes interlayer mechanical property proximity, improves the whole compatibility of interlayer.And reach the protection environment, save the purpose of resource.

The present invention realizes through following technical scheme:

Based on the integrated subgrade and pavement engineering of slag, this subgrade and pavement engineering is that the employing steel slag carries out roadbed processing improvement, slag replacement rubble is pulverized in the roadbed employing up and down, the road surface employing is the integrated form of combined type subgrade and pavement of aggregate with the steel slag;

Above-mentioned integrated subgrade and pavement engineering based on slag, said subgrade and pavement engineering adopt steel slag as main material roadbed to be carried out part or whole improvement.

Above-mentioned integrated subgrade and pavement engineering based on slag, said subgrade and pavement engineering adopt with roadbed about the steel slag and pulverize slag replacement rubble.

Above-mentioned integrated subgrade and pavement engineering based on slag, said subgrade and pavement engineering is for being main aggregate with steel slag.

The advantage and the effect of patent of the present invention are:

1. patent of the present invention is owing to adopt steel slag to carry out the roadbed improvement, and the conditioned soil rigidity will descend than the rigidity of pile body to some extent, has relatively large viscosity and certain compressibilty simultaneously, can effectively absorb seismic wave energy, exempts to shake effect thereby reach.

2. patent of the present invention adopts steel slag, lime, and cement etc. stir with on-the-spot soil or the whitewashing forms of treatment is carried out, or directly on-the-spot soil is replaced easy construction.

3. patent of the present invention realizes the highway construction integrated construction, and the interlayer compatibility is strong, the road top layer should not occur and problem such as peel off.

4. patent of the present invention adopts steel slag to carry out roadbed and handles, and effectively reduces the water permeability of bottom soil layer, realizes, prevents the generation of capillarity, strengthens the integral anti-freezing performance of north cold area highway construction.

5. patent of the present invention as the civil construction material, reaches the refuse reclamation effect with steel slag, saves resource greatly.

Description of drawings

Fig. 1 is a slag road integral structure section general type

Fig. 2 road structure sectional drawing

Fig. 3 spill processing profiles figure

Fig. 4 wall column Combined Treatment form.

The specific embodiment

Integrated subgrade and pavement engineering based on slag can be undertaken by following form.

For highway construction, guaranteeing subgrade rating, when the Deformation control of roadbed is in claimed range, also need guarantees the road surface resistance to overturning, prevent pavement cracking, have certain friction, capability.

Under the general geological conditions, can closely implement by scheme shown in the accompanying drawing 2.(1) according to existing road construction benchmark, replace rubble as roadbed the steel slag of pulverizing, roadbed adds up to the degree of depth to be generally 15-40cm up and down.(2) according to existing road construction benchmark, steel slag is sieved, forms flexible pavement as aggregate, slag pitch amalgam is formed go up the road surface and down the road surface bed thickness be generally 5cm.

For the more shallow geological conditions of weak soil layer; (1) can adopt steel slag after the pulverizing that the roadbed of roadbed bottom is carried out the shallow-layer improvement through the stirring form of rolling and carry and resistance capacity to deformation to improve roadbed, stir and roll processing layer thickness at 1.0m (like Fig. 2) this moment.(2) still do not meet the demands like after treatment roadbed, can implement the wall formula by the roadbed to the roadbed bottom shown in Figure 3 and handle with shallow-layer and combine formation spill processing form.In the road both sides and inner roll, adopt through stirring pulverize steel slag and carry out the wall formula and handle; It is 0.5-2.0m that general wall formula ground is handled depth H 2; Its width need combine the road integral width to confirm, is generally about 1m, and the top shallow-layer is handled depth H 1 and is generally 0.5m.Outer enclosure wall formula processing intent is to prevent that subgrade soil from outwards extruding, and improves bearing capacity; Interior wall formula processing intent is for improving the roadbed resistance capacity to deformation.

For the darker geological conditions of weak soil layer, adopt shallow-layer and wall formula and shallow-layer to handle and combine to handle in the time of can not satisfying the roadbed requirement, as shown in Figure 4, can adopt shallow-layer, wall formula to combine common the processing with column.Wherein column is handled and is adopted the powder slag to stir formation through deep layer; In order to improve the non-deformability of roadbed, the column processing degree of depth is decided according to geological conditions, generally is not more than 10m; Column is handled diameter and is determined that by appointed condition intercolumniation generally directly is advisable with 4 times of posts; Adopt the pulverizing steel slag to roll formed wall formula through continuous stirring in the road both sides and handle, can effectively improve the globality and the stability of roadbed, it still is 0.5-2.0m that general wall formula ground is handled depth H 2, and its width is generally about 1m; The top shallow-layer is handled depth H 1 and is generally 0.5m, can play the interconnect function of wall column processing and road structure, realizes the subgrade and pavement integration.

Claims

1. based on the integrated subgrade and pavement engineering of slag; It is characterized in that: the employing steel slag is a main material; Soft soil roadbed employing steel slag is stirred the compacting mode with on-the-spot soil carry out consolidation process, the road surface is divided four layers, when ground is handled, can adopt undressed steel slag to stir the compacting mode with on-the-spot soil and implement subgrade strengthening; It is main when ground is handled, can adopting the steel slag to pulverize; Little cement, lime etc. stir mode such as compacting and implement subgrade strengthening with on-the-spot soil, the road surface is the slag bituminous mixture.

2. the integrated subgrade and pavement engineering based on slag according to claim 1; It is characterized in that; According to different geological conditionss; Roadbed can adopt (1) to simple shallow-layer roadbed handle, (2) shallow-layer combines the processing of spill roadbed, (3) shallow-layer, wall formula to combine form such as common processings to implement with column with the wall formula, to improve roadbed carrying and resistance capacity to deformation.