Experimental study on mechanical performance of buried reinforced concrete slab under salt-expansion
Based on the field tests of buried reinforced concrete slab in the sulfate saline soil area in Qinghai,the stress variation law of the reinforced concrete slab and its surface under the salt expansion of saline soil considering the influence of temperature was studied,and it was defined as"salt-expansion stress".Based on the internal and external strain monitoring results of reinforced concrete slab,the calculation method of salt expansion stress was obtained by theoretical analysis.Based on the sum of sine function model,the variation process of salt expansion stress in one year period and the corresponding salt expansion effect can be divided into three stages including development stage,stability stage and decline stage.The developing stage is from October of each year to February of the following year.The temperature range is between 0～10℃.Within this temperature range,as the temperature decreases,the salt-expansion stress continues to increase which demonstrates that the salt expands becomes more significant.Suggestions were put forward for the design of buried structures in the saline soil area of Qinghai Province,in order to minimize the damage of saline soil to buried structures.
万方数据
维普
