Geologic Environment Investigation of Underground Engineer in Chongqing

Abstract

Based on many inquiries, analyses and researches, alternate measures of science and social science are taken in this paper, considering series of geo-environmental effect, and the harmfulness of geological effects in Chongqing main city are analysed. The basic counter measures and managing measures are suggested to treat geo-environmental problems in Chongqing main city so that a long-term plan of city-developing and the objective of a struggle based on real situation are set up. The analytic results are helpful to solve the serious geo-environmental effects, and push forward the study of urban geo-environmental problems of underground engineering in Chongqing.

Investigation of the impacts of tunnel excavation on karst groundwater and dependent geo-environment using hydrological observation and numerical simulation: a case from karst anticline mountains of southeastern Sichuan Basin, China

“…According to the present survey, ground collapse developed in the size of 5-100 m 2 horizontally and 1-10 m vertically. Some of the ground collapses occurred very close and jointed into a big one finally (Yang et al 2014).…”

“…Although some researches have been conducted to address the aforementioned problems in Chongqing, most of them are implemented with the aid of the qualitative or semiquantitative approaches of field survey and hydrogeological analysis (Cheng et al 2019;Du et al 2015;Du et al 2016;Wu et al 2016;Yang et al 2014). However, it is very inadequate for the quantitative understanding of the impacts posed by tunnel excavation, and the behavior of karst groundwater system under these anthropogenic disturbances is still unclear.…”

Effects of Flange Width Ratio on the Residual Stresses in Welded Monosymmetric I-Section

“…When meshing, weld and its vicinity unit mesh refinement, the size of the unit control in about 2mm, far away from weld zone is appropriate relaxation. 2 Finite element model diagram 70℃ is regarded as the ultimate cooling temperature in order to reduce calculated amount and save time greatly [5] . Life-death element technology.…”

“…Fig.1Geometric parameters of section Fig.2Finite element model diagram 70℃ is regarded as the ultimate cooling temperature in order to reduce calculated amount and save time greatly[5] . Life-death element technology.…”