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With the construction of infrastructure in China , China's highway tunnel design , construction technology has developed rapidly , the tunnel engineering geological conditions encountered more and more complex . The tunnel project is the hidden works prior unable to accurately understand the engineering geological conditions , a basic understanding of the geological environment in which the basic geological data only through the existing testing methods . Therefore , a great deal of blindness to tunnel design and construction , which makes construction often unexpected collapse , roof collapse , gushing engineering accident , accident event , ranging from the impact of construction, damage to the construction machinery, increase the project cost , loss of state property , while causing tremendous casualties , and after the accident processing is difficult to bring greater losses to the economy and duration . In this thesis, relying on tea Lin Ding , Guangdong Province, Guang-Wu Expressway tunnel , the tunnel is extremely complex geological conditions , the typical adverse geological phenomenon : karst, fault fracture zone . In order to effectively avoid or reduce the occurrence of landslides and other geological disasters in tunnel construction and tunnel construction the warning and Treatment of adverse geological provide technical guidance , it is necessary for the karst, fault fracture zone and other adverse geological phenomena , to carry out the tunnel surrounding rock stability and construction Countermeasures . In this paper, the work : ( 1 ) by typical adverse geological stability of tunnel construction and analysis, forecast the type and characteristics of the tunnel construction disasters that may occur . ( 2 ) Based on the value of construction on soft ground tunnel step method , the step length and the size of the core soil has been optimized . ( 3 ) through the analysis of advanced geological prediction ( ground penetrating radar , TSP ) on unfavorable geological body recognition feature , combined with the early warning indicators of tunnel surrounding rock deformation , build early warning method of tunnel construction phase . ( 4 ) already warning and classification of adverse geological Treatment .
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