Study On Construction Disturbance Of Partition Piles For Surrounding Soil

Following the increase of deep excavation engineering, partition piles were widely applied to the building envelope of deep foundation pit, to isolate the soil pressure and to reduce the influence of foundation pit to surrounding buildings in the process of construction. In practical projects, however, attention is only payed to segregating the lateral pressure of soil from partition piles, ignoring the influence of partition piles during construction process to the disturbance of soil which causes the displacement of surrounding buildings and the subsequent effects of constuction. Under such circumstances, project construction should be quantified the degree of disturbing influence of the partition piles to the peripheral soil in construction process.Firstly, this thesis elaborates the mechanics of soil disturbance caused by partition piles in the process of construction, introducing several estimation theories and computational methods with regard to this problem currently. Then, the thesis explores the influencing factors of soil disturbing degree caused by partition piles in the process of construction from the angles of the depth of piles in soil and the properties of soil. Wuhan light rail and XunLiMen station of the first-stage project of the line two of Wuhan rail transpotation have been selected as research objects. With the combination of empirical method and expansion theory of cylinder pore, the influencing factors of the settlement of bridges and light rails triggered by partition piles in construction process are analyzed in full explanation. On this basis, the monitoring data of the settlement of bridges and light rails triggered by partition piles in construction process is analyzed. Lastly, the thesis set up a simulation model accordingly by combining the monitoring data as well as through the calculation of finite elements numbers. Additionally, the thesis also conducts the sensitivity analysis to influencing factors and demonstrates the rationality of setting partition piles in foundation pits in constuction process in special situations. According to the disturbance effects of partition piles in construction, a set of solutions are put forward to decrease safety and risk probability so as to ensure normal operation of the project.The thesis has summarized the control method to reduce the degree of disturbance of soil impacted by partition piles under construction. The work I've done is of practicability which could offer reference to the design of partition piles and to the control of construction.