Deformation Control Methods in Cantilever Retaining Structure

Abstract:

Cantilever retaining structure is a commonly-used retaining form in excavation engineering, which comes in forms of row piles, diaphragm wall, SMW pile and steel sheet pile. The internal bracing is impossible under the confined conditions of excavation engineering, but parts of the peripheral buildings (structures) are sensitive to the excavation deformation. In this case, some auxiliary measures should be taken for excavation deformation. The paper introduces several commonly-used methods of deformation control in cantilever retaining structure with engineering examples, including two-row piles bracing, reinforcement by bolt (cable), inclined brace in foundation pit, soil consolidation in foundation pit and soil reserving for piles stability. Analysis is made on these methods about the application scope and technical requirements to provide the reference for the design and construction of similar engineering.