Рубрика: HIGHWAY ENGINEERING HANDBOOK

Global Stability

Evaluation of a global safety factor that includes the nailed soil and the surrounding ground requires determination of the critical sliding surface. This surface may be located totally inside, totally outside, or part inside and part outside the nailed zone. Limit equilibrium methods are usually used, and the Davis method is recommended because of its […]

Wall Drainage Systems

Almost all shotcrete failures in slope stabilization applications have resulted from inadequate drainage. Therefore, drainage is a critical design and construction element. Drainage from behind the shotcrete face can be provided by the following methods: 1. Surface interceptor ditch. Excavate a shallow ditch along the crest of the excavation to lead away surface water. Drainage […]

Suitable Soils

Most research to date has been done in homogeneous soils. However, there is no rea­son why the concept cannot be applied to heterogeneous soil masses if proper consid­eration of soil properties is made and rationally applied to the selection of nail length and spacing. To be economical, soil nailed walls should be constructed in ground […]

Anchor Design

Anchor design includes the selection of a feasible anchor system, estimation of anchor capacity, determination of unbonded length, and consideration of corrosion protection. In determining the feasibility of employing anchors at a particular location, considera­tions include the availability of underground easements, proximity of buried facilities to anchor locations, and the suitability of subsurface soil and […]