Construction Network combed the basic situation of semi-filled and semi-dug subgrade construction of related construction enterprises through the knowledge collation of architectural knowledge column of this website:
Half-filled and half-excavated subgrade cross section is partially excavated and partially filled. The most common form is left-right separation, half-digging and half-filling. At this time, earthwork allocation is often used.
Provisions on construction technology of semi-filled and semi-dug subgrade:
Building technology. Manually cooperate with machinery to carry out cutting excavation and slope shaping, and build temporary drainage ditches at any time according to the cutting excavation height, clean and shape the subgrade bed and roll it to the design requirements, and then manually excavate the connecting steps. The subgrade bed should be filled and rolled by layers, and each layer should be filled with 4% cross slope as required. After the completion of filling, bed surface construction will be carried out, and then subgrade filling masonry protection and drainage works will be carried out.
Key points of semi-filled and semi-excavated subgrade construction:
Key points of construction. Impact compaction should be carried out when the bottom of the replacement foundation soil is a soil subgrade, and stability and deformation analysis should be carried out when the soft bottom layer is excavated; After excavation and replacement, the bottom of foundation soil should have a lateral drainage slope of 4% outward; Step joints should be rolled longitudinally along the steps, and small vibrators should be used for construction where large machinery is inconvenient.
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