A Design Method for Compaction Humidity of Southern High Liquid Limit Soil Subgrade
A high liquid limit soil and humidity design technology, applied in the field of high liquid limit soil, to achieve the effects of reducing environmental pollution, effectively utilizing resources, and saving costs
Active Publication Date: 2016-01-20
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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[0003] The purpose of the embodiments of the present invention is to provide a method for designing compaction humidity of high liquid limit soil embankment in southern China, aiming to solve the problem of directly using high liquid limit soil for the design method of compaction humidity for embankment filling
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[0045] 1. Selection of compaction test method
[0046] The natural moisture content of the soil in the hot and humid areas of the south is generally greater than the optimal moisture content. It must be dried to reduce the moisture content, and then layered and rolled. The wet method is more in line with the actual construction process; at the same time, the maximum dry density of the compaction test is wet under the same conditions The method is smaller than the dry method, and the optimal moisture content is greater than the dry method. The use of wet compaction helps reduce the difficulty of high-liquid-limit soil roadbed construction. Therefore, comprehensive consideration is given to choosing wet compaction as the southern high-liquid-limit soil compaction method ;
[0047] 2. Compaction characteristics of high liquid limit soil
[0048] By compacting 5 groups of typical high-liquid limit soil samples under different water content conditions with three different compaction powe...
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The invention discloses a method used for designing compaction humidity of southern high liquid limit soil roadbed. The method comprises following steps: research on selection of high liquid limit soil indoor compaction test method; research on strength characteristics of high liquid limit soil; and research on water stability of high liquid limit soil. The method is based on research of indoor test; is capable of determining the range of compaction humidity of roadbed soil by researches on selection of dry and wet compaction methods of high liquid limit roadbed soil in the southern, on compaction characteristics, on strength characteristics and on water stability; is capable of providing theoretical foundation for direct application of high liquid limit soli as roadbed fillings, solving technological problems of filling of embankments with high liquid limit soli in the southern, providing specific methods for engineering quality control, realizing effective resource utilization, reducing cost and reducing environmental pollution. In addition, the method is simple in operation and possesses high practical application value; and the cost is reduced.
Description
Technical field [0001] The invention belongs to the technical field of high liquid limit soil, and particularly relates to a method for designing compaction humidity of high liquid limit soil roadbed. Background technique [0002] High liquid limit soil has the characteristics of high liquid limit and high natural moisture content, which can easily lead to instability, uneven settlement and subsidence of embankments. However, high liquid limit soil is widely distributed in southern China. If abandoned, it will cause The huge waste of resources, and the need for a large area of spoil grounds and borrowing grounds, it is obvious that in today’s increasingly tight land use simple abandonment and replacement methods are becoming less and less feasible; if lime and other stable materials are used for improved treatment, It will cause environmental pollution, increase construction costs, and greatly extend the construction period. Therefore, determining the compaction humidity design...
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IPC IPC(8): G01N33/24
Inventor 张军辉郑健龙尹志勇周宇姚永胜岑广明
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY