| Summary: | 碩士 === 中華科技大學 === 土木防災工程研究所 === 98 === Deep excavation retaining wall project into support systems and internal pull-back, Geological improved soil nail reinforcement works are back pull retaining works, Modified to enhance the use of geological strata are not excavated soil strength, Reached with the stiffening and stability of soil nail excavation of regional stratigraphic. Case of the this research use simulation, does take the FLAC formula as for improvement of soil nail reinforcement of geological engineering methods used in the parameters of excavation, movement of factors in different situations, on sandy soil excavation and lateral deformation of the excavation face affected by the strength of soil nails.
The results show that under different sections, taken way back at the top section, resulting in the curve very close, so the excavation face the greatest control of soil nail pull limited success. With the increasing intensity of ground improvement, the maximum horizontal excavation face deflection decreases with the phenomenon, but increased near the excavation surface area of soil strength on the deflection control the effect of greatly. Dart set of geological strength improved strength, the improvement of intensity increments, variable bit no significant effect of control. With the soil nailing design drawing force per unit length increases, the maximum horizontal deflection excavation face the slight decrease, the phenomenon displayed solely to enhance the design of soil nail pulling force per unit length on the deflection of the control had no significant effect.
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