Generally, the protection methods can be plant protection, stone masonry protection and concrete protection Slab protection, gabion, riprap, retaining wall and other measures or two or more measures shall be adopted comprehensively.
2.
1.3 subgrade base, hydrological conditions, flood impact and other conditions have been found out, and corresponding measures have been taken.
4.
3.3 protection and reinforcement construction shall be carried out in strict accordance with the design drawings and documents and according to the nature and degree of the destructive effect of water flow on the subgrade.
For the construction materials of embankment below normal water level, slag, block stone, gravel and other materials with good water stability should be selected, and the particle size should not be greater than 30cm.
See Fig.
4.2 all measured items of subgrade construction comply with < < Standard for quality inspection and evaluation of Highway Engineering > >…
Construction preconditions 1.1 the on-site safety and quality assurance system has been established and the person in charge of construction in the work area has been defined.
3, construction technology and process for construction process.
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4.1 the construction quality must ensure the stability of the subgrade, and the damage to the subgrade caused by geology, hydrology and flood has been fully considered in the subgrade construction.
When the actual situation of the construction site is inconsistent with the design protection form, the design representative of the supervising engineer shall be requested to change the design.
1.4 the commencement report of subdivisional works has been approved, and the labor and construction machinery on the construction site meet the construction progress and quality requirements.
1.2 the design drawings and documents have been reviewed, the questions raised have been replied by relevant departments, and detailed technical disclosure has been made to technicians and teams.
3.1 filling and borrow: centralized borrow area should be set.
3.2 materials with good water stability, such as naturally graded gravel, pebble crude (medium) sand, hard stone fragments and gravels that are not suitable for weathering.
