Preloading System Construction
The preloading load is an important part of the drainage consolidation method, which promotes the power of free water discharge between the particles. The implementation of preloading is mainly reflected in the graded loading. The stability of each stage of loading depends on the improvement of the strength of the previous stage before preloading. In order to accelerate the consolidation of the foundation, the preloading of the pile is combined with the gravel cushion and the bagged sand well to treat the substrate.
In order to ensure the safety and progress of the construction, the observation section is set, and the settlement and displacement are observed to guide the construction. Five observation points and two level points are set for each observation surface. Before the roadbed is filled, install the subsidence plate on the cleaned surface on the road center and left and right shoulders according to the design requirements; at the same time, the displacement observation pile is buried 1 meter away from the foot of the embankment.
During the pre-loading period, settlement observation should be carried out according to the regulations. After the embankment settlement deformation reaches the expected value of the design, the pavement can be paved, and the excess soil above the roadbed will be unloaded, and the embankment will be renovated to the elevation of the roadbed surface and meet the compaction requirements.
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