A subgrade filling construction method utilizing aeolian sand

Abstract

The invention relates to a subgrade filling construction method utilizing aeolian sand. The method includes 1) finishing preparatory work before construction; 2) clearing the surface of a subgrade, and rolling the subgrade surface before filling operation; 3) filling the subgrade with the aeolian sand; 4) spreading out and leveling a filler pushed and conveyed into a filling road segment, and controlling the loose laying depth by adopting a line hanging process; 5) arranging a cofferdam, digging a ponding facility in a lower wet section, arranging a water feeding pipeline and performing watering treatment; 6) performing mechanical rolling, after the subgrade is compacted, and spraying water on the surface to stabilize compaction; 7) measuring the field compaction density by adopting a cutting ring process, detecting the foundation coefficient of the subgrade, and if the field compaction density and the foundation coefficient in a detection result are unqualified, repeating the step 6)until the field compaction density and the foundation coefficient in a detection result are qualified; 8) repeating the step 3) to the step 7) until the subgrade is filled to a set standard height, and performing slope cutting; and 9) sealing and protecting the top surface and side slopes of the subgrade. The scientific and reasonable subgrade filling construction method utilizing the aeolian sandis provided and has advantages of capability of being energy saving and environmentally friendly, capability of reducing the cost, and the like.

Description

technical field [0001] The invention relates to the construction field of water conservancy and hydropower projects, in particular to a construction method for filling aeolian sand subgrade. Background technique [0002] The geological surface of the Gobi Desert in Xinjiang is mostly aeolian sand, which is prone to wind erosion and wind accumulation, which is very unfavorable to road subgrade construction. Conventional road subgrade construction uses gravel soil backfill as the subgrade, but this method wastes land resources and costs a lot. How to obtain local materials and use aeolian sand for subgrade construction to achieve energy conservation and environmental protection and reduce project costs is an important issue in road construction for high-pressure projects. However, it must be noted that necessary measures should be taken during the construction of aeolian sand subgrade Environmental protection measures, closed management of aeolian sand embankment to reduce win...

AI Technical Summary

Problems solved by technology

Due to wind erosion all the year round, the particles of aeolian sand are smooth, and the cohesion between particles is very poor, so it is difficult to form a whole, and it is easy to move under the action of external force. During construction, it is difficult to fill the roadbed with aeolian sand. Meet the design requirements of the subgrade, and at the same time, it is difficult to load the aeolian sand subgrade

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