FIELD TEST OF MULTISTAGE REINFORCED EARTH COMPOSITE RETAINING WALL

A multistage reinforced earth composite retaining wall composed of L-type retaining wall and reinforced earth retaining wall was investigated in situ． The test results showed that the measured values of earth pressures and tensile strains in geogrid-reinforcement of the multistage reinforced earth composite retaining wall growed with the increasing of fill height，while the growth rates of those decreased; the vertical earth pressure of reinforced soil at the bottom of the L-type earth retaining wall was nonlinear distributing along the length of geogrid-reinforcement under construction，then obvious nonlinear distributing was observed on the above concrete-block reinforced earth retaining wall under construction，but the maximum values were close to the end of geogrid-reinforcement; tensile strains of geogrid-reinforcement of that were very small，and had only one peak; the vertical stresses at the bottom of the concrete-block reinforced earth retaining wall were first equivalencelinear and then non-linear along the geogridreinforcement length with the iucreasing of the fill height，and had two peaks; their change forms were the same，and the one of the inside bottom were first larger and then smaller than that of outboard; the lateral earth pressure on concrete-block wall was non-linear distributing along wall height，and the tensile strains of geogrid-reinforcement were non-linear distributing along the length of geogrid-reinforcement，but the measured values were lesser．