Grouting Reinforced Foundation Bearing Capacity Computing And Engineering Research

Injection grout has mainly been used to stabilizate soft-clay, sand, artificial fill, in order to improve the ground bearing capacity and and to reduce settlement. The bearing capacity of ground stabilization by injection grout is decided by accurate and reasonable parameters of grouting. so, the grouting parameters is the same important data as bearing capacity for evaluating the result of injection grout . Basing on analysing present condition of grouting grout research technique and of application condition of grouting grout in geotechnical engineering ,the text combines actual problem of grouting grout ,then studies on calculating the bearing capacity of ground stabilization by injection grout, last the result is compared and analysed with the engineering example.The different grouting ways is decided by acceptable proerty of soil and feasibility of injection liquid . These are two grouting ways , including the spreading ways of permeability and split. Because the construction process is different, the ways of spreading is different in soil, the permeability grouting and split grouting is respectively divided into the spreading way of spherical and the spreading way of cylindrical . The parameters of injection grout will be worked out by different methods when the grouting way is different. If the grouting way is permeability, the parameters of injection grout will be worked out by the traditional permeation injection grout theory which the different aspect is the spreading way . if the grouting way is split, the parameters of injection grout will be worked out, which the soil can be regarded as an ideal elasticity-plastic body, with different methods for the spreading way of spherical and cylindrical. in fact, the injection grout enhance the stability of groud, the mechanism of ground stabilization is interpreted by three fields, including rection of cement hydrolysis and cement hydrate, rection between the soil and cement-hydrate, and carbonation carbonation.This paper studies the form of damage on the ground of the limit loading, then analysises the characteristics of the ground stabilization by injection grout and discrete material pile which being pressed , then ground stabilization by injection grout is divided the stabilizated soil by injection grout and the soil grouting interval, and draw lessons from discrete material pile , the two methods which is used to calculate the ground bearing capacity by injection grout is put forward . The first method is combination of area, the first calculates the bearing capacity of the stabilizated soil by injection grout, then calculates the bearing capacity of soil grouting interval, last through a combination relations , the ground bearing capacity by injection grout will be worked out; The second method is which stabilization soil by injection grout and soil of grouting interval is matched together, then the ground bearing capacity is worked out through flexibility- plastic theory.In this paper, By using the formula for calculating the parameters of injection grout and the formula for calculating the ground bearing capacity, the ground bearing capacity of 220kV Lijiang transformer substation and 220kV Diqing transformer substation by injection grout is worked out .The results of calculating, compared with the results of field tests, is consistent. so, the formula for calculating the parameters of injection grout and the bearing capacity.of the paper is reasonable and scientific.