Control method of compaction degree of layered filling of high liquid limit soil

Abstract

The invention discloses a control method of a compaction degree of layered filling of high liquid limit soil, comprising the following steps of: A, before the layered filling in embankment filling engineering of an expressway or a first-class highway, if the denseness of the fillers reaches more than 1.15, judging that the fillers are qualified and directly carrying out the filling; and B, after a compaction construction on the expressway or the first-class highway is finished, detecting the air rate of the fillers which are below 1.5 m of the bottom surface of the road surface, wherein when the air rate is not more than 8 and is not less than 4, the requirements on the layered filling and the compaction can be met. As the quality of the embankment filling is controlled on two aspects including a flexible plastic degree before the compaction of embankment filling of the high liquid limit soil and the air content ratio after the compaction of embankment filling, by utilizing double indexes including the denseness and the air rate, the reliability of a quality control index can be guaranteed with the method provided by the invention and the requirement on the national compaction degree is met; therefore, the quality of the embankment filling is guaranteed, the potential dangers of the embankment filling are eliminated before the compaction of embankment filling, and the damage to the road surface, which is caused by the incompactness of the filling of a road bed of the high liquid limit soil, is greatly reduced.

Description

technical field [0001] The invention relates to a construction control method for the compaction degree of layered filling of high liquid limit soil embankment, in particular to a method for layering high liquid limit soil in embankment engineering of highway high liquid limit soil layered filling A method of controlling the degree of compaction of the fill. Background technique [0002] High liquid limit soil is a kind of fine-grained soil, which has two characteristics at the same time: first, the content of particles smaller than 0.074mm is greater than 50%; second, the liquid limit is greater than 50%. The characteristics of high liquid limit soil are: the natural moisture content is high and far exceeds the optimal moisture content; the water retention is strong, and it is difficult to reduce its moisture content in the natural state; the content of fine particles is large; the strength is low, and the water stability is poor. [0003] As a special soil type, high liqu...

AI Technical Summary

Problems solved by technology

There are many types of high liquid limit soils, and their properties are also very different. Due to regional differences, it is obviously unreasonable to adopt a unified national compaction degree standard, which will also cause unnecessary waste, and sometimes even cause compaction during construction. The compactness meets the requirements, but it cannot meet the compaction standard under the changing natural environment, and it is difficult to truly reflect the compaction effect of high liquid limit soil according to the current embankment compaction standard in my country