跨座式单轨群桩基础沉降特性研究

跨座式单轨交通具有造价低、爬坡能力强、车辆运行噪音低、占地少等诸多优点,也正在得到更多国家、地区的推广应用.目前跨座式单轨交通正线线路普遍采用高架桥-梁的形式,虽然这样的形式有利于控制沉降和稳定结构,但是当跨座式单轨交通形式在软土地区修建时,其结构形式带来的建设成本就会变得十分巨大.本文依据拟建柳州轨道交通中高架段梁-...

Study on Settlement Characteristics of Straddle Monorail Pile Group Foundation

The straddle type monorail transportation has many advantages such as low cost, strong climbing ability, low noise of vehicle operation and small land occupation, and is also being promoted and applied by more countries and regions. Although the viaduct-beam laying form commonly used in straddle-type traffic lines has a tendency to control settlement and stability, the cost of constructing similar traffic lines in soft soil areas will become enormous. According to the design of the proposed elevated section of Liuzhou rail transit and the existing structure of the elevated section of Chongqing rail transit, the model is built by Adina to make it sit on the pile group foundation, and the settlement characteristics under the dynamic load generated by train operation are analyzed. Considering the factors such as pile length, single and double line, and pile foundation strength, it is found that under the dynamic load of single-line train, the vertical displacement of the soil around the pile decreases with the increase of depth, and changes with the length of the pile. The settlement caused by it is relatively small, and the foundation is relatively stable. When studying the influence of the change of the elastic modulus of the foundation soil, it is found that the improvement of the mechanical properties of the soil will make the pile group foundation perform better and better. In the double-line operation, the pile group foundation needs to be redesigned to consider the load distribution form.