Papers by Author: Li Ying Peng

Abstract: Combined with the collected mining conditions and geological characteristics of coal mine mined-out areas, this paper analysed the present collapse situation of the coal mine mined-out area, the mechanism and influence of the surrounding environment. It puts forward the comprehensive analysis model considering multiple factors. And corresponding conclusions could provide theoretical guidance for urban planning, construction and sustainable development research.

Abstract: Guangxi province is the typical expansive soil area, and the unconfined compressive strength is the important strength index. There is little studied result about the unconfined compressive strength of expansive soil in Guangxi province. Based on the expansive clay experimental embankment of Nanyou Highway, the experimental research on the unconfined compressive strength was undertaken. Tests results indicate that the expansive clay samples are all disintegrated when the sample is dip in water, which show that the stability of expansive clay is very weak. Some lime improving samples of curling 7 days and 14 days are also disintegrated when dipping in water, which indicate that the unconfined compressive strength sample of lime improving expansive clay should curl 28 days. Lime ratio and curing time both influence the unconfined compressive strength of improving expansive clay greatly. There is optimum adding lime ratio for lime improving expansive clay. During the early days of curing the unconfined compressive strength have linear increase with curing time.

Abstract: Started from structure construction ,this paper carried out numerical analysis about the test members through computer simulation and studied the influence of cover thickness and stirrup spacing on the rust expansion crack by means of rapid electrifying for accelerating the corrosion of longitudinal reinforcement. Based on this, it established the correlativity between member surface stress and concrete cover thickness, stirrup spacing. And this paper found the influence law of cover thicknesses and stirrup spacing on rust expansion crack on specimen surface.

Abstract: Through experiment and theoretical analysis, this paper researched the influence of steel bar corrosion of hollow slab hinge joints on the structural mechanical behavior. The results showed that when load was little corrosion of hinge joints steel bar would do little to affect the joint between hollow slabs and hinge joints would work together with hollow slabs as a whole. When load was large, corrosion of hinge joints steel bar would decrease the joint between hollow slabs.