Test Study Of Pile Foundation For A Viaduct In Guangzhou City

With the rapid development of infrastructure construction in our country, people of the. fabrication cost of the pile foundation engineering, proj ect schedule, engineering quality, environmental protection and foundation bearing capacity and settlement and other indicators requires more and more strict. City track traffic high speed driving on the lines of the ride has higher requirements, how to reduce stress in the construction process of release to ensure drilling quality, reduce the impact on the surrounding environment, the field test is method of obtaining the Viaduct Pile Foundation design parameters of objective and reliable. Therefore, this paper to a viaduct project in Guangzhou as an example, select several pile foundation test point were studied from the following aspects.(1) the test objective of this project, the engineering geological conditions of the test content and test points.(2) for bored pile, the quality of the hole is very important, according to the results of the test hole, into the air quality were detected.(3) the pile quality is solved the bearing capacity of pile, the low strain reflection wave method, acoustic wave transmission method and low strain and acoustic detection method of buried pipe test quality defects were detected.(4) for the single pile vertical compressive properties and pile stress test is carried out, the influence factors of vertical bearing capacity of single pile and some suggestions are given.(5) the horizontal static load and pile stress test, the horizontal load of single pile under the maximum bending moment and bending moment point and single pile ultimate bearing capacity, and gives the load to horizontal limit load The bending moment at the maximum bending moment is generally on the high side.The research of this paper can provide theoretical and design basis for the construction design of urban rail transit viaduct.