Construction process of cement modified soil

Abstract

The invention relates to the technical field of expansive soil treatment processes, in particular to a construction process of cement modified soil. The construction process mainly comprises the following steps: first, the expansion level of an expansive soil material is tested, and a physical property test and a compaction test are carried out on the cement modified soil subjected to filling replacement; second, after the property of the cement modified soil is detected, regulated and controlled, mixing and filling preparation is conducted; third, operation construction is conducted through mechanical equipment; 4, the construction quality of the cement modified soil for filling construction is subjected to quality control and detection; and fifth, real-time detection and timed maintenance are conducted. The construction process is used for improving expansive soil and the construction quality of a channel section and a construction section to ensure the cement modifying effect of theexpensive soil and the filling quality of the modified soil material, by regulating construction data to standard parameters, the functions of high water content quick decreasing, ultra-large soil mass breaking, cement mixing uniformity improving and the like can be quickly realized, meanwhile construction operation is efficient and easy, the quality is controllable, construction is reliable, thecost is saved, and the construction process has obvious social benefits and economic benefits.

Description

technical field [0001] The invention relates to the technical field of expansive soil treatment technology, in particular to a cement modified soil construction technology. Background technique [0002] In water conservancy construction, the construction of the canal section located in the hilly area has relatively undulating terrain. The foundation of the canal foundation is mainly a soil slope with a thick covering layer, and the canal foundation soil has moderate and weak expansibility. It belongs to expansive soil, which is a kind of cohesive soil whose volume expands violently after soaking in water and shrinks significantly after dehydration. Because the soil contains more clay minerals such as montmorillonite and illite, it is very hydrophilic. When the water content is high, the expansion amount and expansion force after immersion in water are small, but the shrinkage amount and shrinkage force after dehydration are large; when the natural pore ratio is larger, the e...

AI Technical Summary

Problems solved by technology

[0003] Because expansive soil is a special soil that swells when it encounters water and shrinks when it loses water, it has many cracks, super-consolidation, disintegration, weathering, and is extremely susceptible to dramatic changes in climate and environment, resulting in expansive soil. Buildings, railways, highways, airports, water conservancy projects, etc. in the area often suffer huge damage, resulting in major economic losses. Therefore, when carrying out engineering construction in areas with expansive soil, we must first consider how to deal with the problem of expansive soil, how to deal with it and update it. Filling is currently an operational problem, and when the expansive soil modification is completed, how to monitor the construction quality rigorously and efficiently is also a serious work problem