Parfect

In situ soil remediation refers to the soil remediation technology that does not move contaminated soil, and directly repairs or processes the contaminated soil in the site, it has the characteristics of low investment and little influence on the surrounding environment. In situ soil remediation technology mainly in situ leaching, vapor extraction (SVE) and multi phase extraction (MPVE), gas injection (IAS), biological degradation, in situ chemical oxidation (ISCO), in situ chemical pollutants reduction, fixation, phytoremediation and so on. In situ soil remediation requires local conditions, flexible combination of time, pollution, geological conditions, ground facilities, summed up the most economical and practical methods of repair, and improve technology in more research, making the in situ remediation technology more economical and effective. In situ soil remediation techniques include in situ physical remediation, in situ chemical remediation and in situ bioremediation. In situ

As the urban infrastructure continues to expand, every year the construction mud blowout, and how to deal with a large number of sludge and mud has become a problem. Due to the lack of effective scientific and reasonable disposition, A large number of construction mud exist secretly illegally discharge, causing water pollution, river silting and other environmental problems. The traditional disposal methods of silt are accumulation and landfill, so there are many disadvantages and future problems, and the transportation cost is high and the receiving sites are limited. Especially the subway shield mud is different from the general waste, high water content, leaks often occur during transit. To the designated residue temporary receiving point, silt accumulation height is limited, the site is limited, can not meet the demand, a large area of silt piling up, if not dealt with in time, there are still very big security risks. And sludge composition is very complex, in addition to stacking

Mixing the cement or (lime) material with the soft soil foundation into a column by excavator mounted mixing head , and the column becomes a cement clay pile, it has a certain strength and water stability. The composite foundation is composed of mixed column and surrounding soft soil, which can improve the bearing capacity and strength of foundation, and increase the modulus of deformation of foundation. Otherwise, the soft foundation strengthened by mixing method reduce the foundation settlement , prevent the flow of the water, strengthen the stability of the foundation, and also can prevent the infiltration of groundwater. Soft soil foundation with normal consolidated silt, silty soil and cohesive soil with high water content and silty soil is used to treat peat soil or ground water, and its applicability should be determined by experiment. Construction of highway and bridge on soft soil foundation, as long as the design and construction measures are proper, can ensure the stab