Geoscience Reference
In-Depth Information
11
Recent Experiences of Reinforced
Soil Retaining Structures in China
Li Guangxin and Wang Zhao
Tsinghua University, Beijing, China
ABSTRACT
The application of a retaining structure reinforced by synthetics has been
wildly developed in China. The retaining walls and steeped slopes have been
used in many projects, such as the sidewall of a sluice and a highway and
the abutment and pier of a bridge. These main cases and related studies on
model tests and methods of design and construction are presented in this
chapter.
1 INTRODUCTION
The geosynthetics reinforced soil (GRS) retaining structures are composed of
reinforced soil and facing structure. Woven geotextile and strip are usually used
as reinforcements. A separation technique is in common use in China. The
technique is wrapping the geotextile around the face of the wall in the reinforced
soil which is connected by strips with facing plate. Between the reinforced soil
and facing plate, coarse sand is used as filling material. The facing plate is of a
different type, such as modular blocks, full-height concrete plate, concrete
blocks, bricks, and shotcrete facing. In most cases, in the retaining walls on-site
soil is used as backfill; it even is cohesive or expansive soil. Comparing different
gravity walls, the cost of the reinforced wall can be reduced (20-60%).
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