Deep patch technique for landslide repair. Final report

Technical Report · Sat Oct 01 04:00:00 EDT 1994

OSTI ID:91380

Helwany, B M

The report describes the laboratory testing of the `USFS deep patch` technique and a CTI modification of this technique for repairing landslides with geosynthetic reinforcement. The technique involves replacing sections of roadway lost due to landslides on top of a geosynthetically-reinforced embankment. The CTI modification involves replacing the reinforced slope with a geosynthetically-reinforced retaining wall with a truncated base. Both techniques rely on the cantilevering ability of the reinforced mass to limit the load on the foundation with a high slide potential. The tests with road base showed that (1) both the USFS and CTI repair reduced effectively the adverse effects of local landsliding on the highway pavement by preventing crack propagation; (2) the USFS repair increased the stability of the repaired slope, which was in progressive failure, by reducing the stresses exerted on it; and (3) the CTI repair produced substantially greater stresses on its foundation due to the truncated base of the reinforced mass.

• Research Organization: Colorado Transportation Inst., Denver, CO (United States)
• OSTI ID: 91380
• Report Number(s): PB--95-236923/XAB; CTI-UCD--2-94
• Country of Publication: United States
• Language: English

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