Remedial Measures for Correcting Slides

When a slide takes place, determining the cause of the slide is necessary to take proper remedial measures to correct it. This chapter describes the field investigation that must be undertaken before planning and design of such remedial measures. The scope of a field investigation should include topography, geology, water, weather, and history of slope changes. After the field investigation, some preliminary planning is needed before the start of the permanent remedial works. Corrective methods can either decrease the driving forces or increase the resisting forces. The chapter describes various methods for correcting slides, including slope reduction or removal of weight, buttresses, surface drainage, subsurface drainage, retaining walls, anchor systems, bridging or tunneling, soil reinforcements, pile systems, vegetation and biotechnical stabilization, and hardening of soils. The selection of methods for stabilization also is discussed.