文档介绍：Code for investigation of geotechnical engineering ( Edition
2009)
11. Laboratory Test
General provisions
Indoor tese grading test may only carry out for sand soil if grade I grade II or grade III test unachieved.
2. It may not carry out organic content test if megascopic observation identifies no organic matter.
The method for limit of liquidity test should be base on the request of classified valuation and in according with provisions in current state standard Standard for Soil Test Method (GB/T 50123) and noted clarify in test report. Specific gravity may determine by experience in the region where there is experience, if any.
Permeability test may carry out when seepage analysis be necessary, foundation dewater design request permeability parameter provided and so on. Constant head permeability test apply to sand soil and stone; variable head permeability test apply to silt and clayey soil. Coefficient of consolidation, coefficient of volume compressibility, assumed coefficient of permeability may determined by consolidation test for the soft soil with lower permeability to water. Numerical value of coefficient of soil permeability adopted should be determined follow by comparing with the result of water pumping test or the result of water injecting test.
When quality control be necessary such earthwork as backfilling or reclaim engineering carried out.
Compaction