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Zhao Yang, Pengfei Liu, Peishuai Chen, Shuchen Li and Fuquan Ji
The slurry?earth pressure balance dual-mode shield has an earth pressure balance (EPB) and slurry shield functions. Based on a shield tunnel project of Guangzhou Metro Line 12 in China, this study investigates the clogging prevention of a slurry?earth pr...
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Min Lee Lee, Yee Linn Lee, Sxue Liang Goh, Chai Hoon Koo, See Hung Lau and Siaw Yah Chong
Unforeseen ground conditions are some of the main contributors to construction cost over-runs and late completion. Recent research trends have witnessed the scopes of building information modeling (BIM) technology being extended to subsoil and substructu...
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Yuan Mei, Dongbo Zhou, Wenyan Shi, Yuhang Zhang and Yu Zhang
Due to the large cross-section design of large-diameter shield tunnels, most of the rocks and soils it crosses are composite strata with upper soft and lower hard. In order to reduce the construction cost of shield working shafts, large-diameter shield l...
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Xiaohua Bao, Chunxun Liu, Lijuan Li, Jun Shen, Jihao Pan, Qijun Dong and Xiangsheng Chen
The Shenzhen Ma Wan area has special geotechnical conditions, with more than 50% of the area being reclaimed rock formations. Riprap reclamation strata are particularly susceptible to significant deformation upon stress release. To comprehensively compre...
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Ling Fan, Zhize Xun and Shuquan Peng
Based on an improvement project of soft soil ground in Zhuhai City on the Pearl River Delta, a comparative study on vacuum preloading and surcharge preloading was performed. The ground and stratified settlements, excess pore water pressure, and the degre...
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Anna Chiaradonna
The first step for learning any calculation code for seismic response analysis is an adequate understanding of how to properly set the boundary conditions and the properties of the soil model at the initial stage, i.e., before the shaking event. To pursu...
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Zhijie Sun, Xuanyu Yang, Shuai Lu, Yang Chen and Pengfei Li
By combining model testing and numerical simulation, this paper focuses on the influence of landslides on tunnels in loess-bedrock strata by using the perfect landslide?tunnel system (LTS). A mechanical test and simulation (MTS) system was used to provid...
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Zhe Wang, Weihao Feng, Shuwei Wu, Pengfei Wu, Sifa Xu, Zewei Yao and Jiuchun Sun
Recently, many studies have been conducted on the stratum deformation induced by earth pressure balance (EPB) shield tunneling in soft soil and sand. Movement laws vary largely among different strata. However, at present, relevant research mainly focuses...
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Xuemin Zhang, Dong Fu, Xianshun Zhou and Yuanyuan Han
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G. Castellaro, G. Gompertz, C. Aguilar, R. Vera Vera, R. Allende
Pág. 41 - 49
Sheep production on the Mediterranean dry climate lands of Chile is characterized by its seasonality and extensive production system, with low use of purchased external productive inputs. The prevailing market conditions have determined an increasing ten...
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Gilberto Villanueva-López, Pablo Martínez-Zurimendi, Luis Ramírez-Avilés, Fernando Casanova-Lugo, Aarón Jarquín-Sánchez
Pág. 175 - 186
The aim of the current study was to evaluate the effects of two livestock systems, a livestock system with live fences (LSLF) of Gliricidia sepium associated with signal grass (Brachiaria decumbens) and a livestock system based on a grass monoculture (LS...
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S.L. Burns,J.F. Goya,M.F. Arturi,P.F. Yapura,C.A. Pérez
Pág. 170 - 178
Aim of study: The objective of this study was to analyze the stand structure and spatial pattern of two A. chilensis stands with contrasting soil conditions and different site qualities in order to explore if these differences lead to patterns similar to...
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Xiaorui Wang, Xu Liu, Yunhong Lin and Fei Tan
Small curved metro shield tunnels located in fine sand layers are sensitive to the response of horizontal and vertical cyclic loads from train operations, especially for centrifugal horizontal loads. The majority of Zhengzhou?s strata are dominated by th...
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Hanaa A. Megahed, Abd El-Hay A. Farrag, Amira A. Mohamed, Paola D?Antonio, Antonio Scopa and Mohamed A. E. AbdelRahman
In arid and hyper-arid areas, groundwater is a precious and rare resource. The need for water supply has grown over the past few decades as a result of population growth, urbanization, and agricultural endeavors. This research aims to locate groundwater ...
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Nara Somaratne and Gary Hallas
Coliform source tracking was undertaken on 48 water sources of which 42 are potable in 26 water supply systems spread across South Australia. The water sources in the study vary from unprotected springs in creek beds to deep confined aquifers. The freque...
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Anup KC, Govinda Bhandari, Subigya Prabhat Wagle, Yubraj Banjade
Pág. 56 - 67
Soil is a complex mixture of mineral nutrients, organic matter, water, air and living organisms. The primary nutrients for plant growth are organic matter, nitrogen, phosphorus and potassium. In order to find the status of pH, organic matter (C), total n...
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Huijian Shi, Ruixue Lv, Yingxiao Liu, Dawei Xiao, Zhen Wang, Xia Yuan, Lanyu Liu and Cuicui Yu
The western plain of the Nansihu Lake Basin (NLB) is an important agricultural economic zone in Shandong Province, where there is a high content of fluoride in soils. Studying the content and influencing factors of fluoride in soils is of great significa...
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Changan Zhang, Jianlei Gao, Zhengzhong Wang and Chang Liu
More complex geological conditions could be encountered with the construction of urban subway projects. At present, many subway tunnels have been built in composite strata with upper soft and lower hard layers, but the presence of a cavity in the strata ...
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Mengyu Sun, Jianxin Liu, Jian Ou, Rong Liu and Ling Zhu
Electrical resistivity tomography is a non-destructive and efficient geophysical exploration method that can effectively reveal the geological structure and sliding surface characteristics inside landslide bodies. This is crucial for analyzing the stabil...
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Tao Wang, Yu Xiang, Liyuan Liu and Wang Xiong
Relying on the Mawan undersea large-diameter, dual-line, mud?water-balanced shield tunnel project and focusing on the characteristics of the tunnel, such as the complex geological conditions at the expected intersection location and the existence of a su...
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