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Matters needing attention in treating soft soil foundation by drainage consolidation method

1.Drainage consolidation method is applicable to soft soil with thickness greater than 5m, but soft soil with sensitivity of more than 5 is not suitable. 2.The preloading time of drainage consolidation method should be guaranteed for more than 6 months. 3.The construction section of bridge head should be pre compressed before excavation of pile foundations and caps, so as to avoid the displacement of pile foundations and caps due to preloading. 4.In order to improve the overall stability of the embankment and the drainage performance of the cushion, geosynthetics can be installed in the horizontal drainage cushion. 5.The adjacent sections of the structure should be combined with the plastic drain board combined with overloading preloading, and the height of overloading is generally 30% to 50%, with high filling and tight filling period, the vacuum combined loading preloading can be used. PARFECT soil stabilization equipment can transfer the soil binder through the air compressor to th
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Analysis on the market competition of soil remediation

Because of the lag of soil pollution, and there are many difficulties in the identification and monitoring of soil pollutants in the past, the problem of land pollution has been paid less attention in the past. The relocation and abandonment of industrial enterprises is the product of accelerated urbanization in China in recent years. The relocation of polluting enterprises has been vigorously implemented in various large and medium-sized cities, such as Beijing, Tianjin, northeast old industrial bases, the Yangtze River Delta and the Pearl River Delta. The environmental problem of contaminated land has become an obstacle in the process of land redevelopment. At present, some old industrial districts located in cities cannot be redeveloped due to pollution problems, so they are very concerned by governments and enterprises in recent years. Based on the strong support of national policies, soil remediation industry is gradually emerging. According to the data released by the foresight
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Development status of soil stabilization technology in China

In recent years, more and more soil stabilized projects in China have been growing rapidly, and have become the leading technology. Engineering amount from hundreds of cubic meters to several million cubic meters of soil, soil stabilization technology is not only applied in the remediation of contaminated soil, but also has become an important technology for sediment treatment of river pollution. Soil stabilization technology has been applied to heavy metal contaminated soil and sediment, such as Hg, Pb, CD and as, and is applied in the sediments contaminated by PAHs and pesticides. The technology of chemical oxidation and stabilization combined to repair organic polluted river sediment has also been applied. The stabilized soil and sediment are used in landfill disposal, site barrier and used as subgrade material. At present, most of the soil stabilization projects in China are implemented by stabilizing technology. There are few works on solidification technology, which is in sha
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Research and development direction of polluted soil treatment technology

After more than 10 years of research and application, system of contaminated soil remediation technology including physical / chemical remediation, bioremediation repair and remediation, has been formed, and accumulated the application experience of repairing comprehensive engineering and soil pollution, the new research hotspot of the in situ bioremediation of contaminated soil and based on monitoring the natural repair technology appeared. The future research of polluted soil treatment technology is developed from the following aspects: 1.To develop green soil bioremediation technology Soil bioremediation is more stringent for environmental requirements, such as soil properties, temperature, pH value, and nutritional conditions. This needs to be constantly adjusted in the process of practice and ultimately to find the best condition. For the hyperconcentration plants, they need be collected at the appropriate time and take reasonable treatment and disposal methods. Not only can avoi
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Development trend of silt resource utilization

The dumping of silt directly into the sea and landfill has shown its drawbacks. Under the condition that the content of heavy metals in the current sludge has not been effectively controlled, it is very easy to cause two pollution. As a new way of sludge treatment, the energy utilization of silt has not been dabbled in China. In a lot of silt treatment, the resource utilization of the building materials, represented by the silt made sintered bricks, is the best way out. Firstly is the demand for raw materials of building materials industry is very large, a lot of silt can timely disposal; Secondly is that many brick enterprises are facing the dilemma that no soil can be dug up, the original of fixed assets wasted, a lot of silt is the ample supply of its ammunition, to ensure the maximum utilization of resources, social and economic benefits; Thirdly, sludge can be calcined at low temperature. It can become a building material with high value and good energy saving effect, and the toxi
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Suggestions on the development of soil stabilization technology

Although there are many engineering cases of soil stabilization technology research and application in China, there is still a lack of research in comparison with the United States, Europe and Japan. Materials, technology and equipment are difficult to cooperate with each other, and have limited support for actual engineering and environmental management. Lack of experience in practical soil stabilization projects , long-term environmental monitoring and assessment, and extensive process control; The domestic complete set of highly efficient mobile soil stabilization equipment need to be developed. In view of the above analysis, the following countermeasures and suggestions are put forward. First, we should carry out collaborative research on efficient soil stabilization technology, technology and equipment, improve the level of industrialization and equipment technology, and promote the construction and development of soil stabilization engineering in China. Pay attention to the app
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Geotextile reinforcement method of soft soil foundation treatment

In order to improve the bearing capacity of foundation, reduce the settlement and increase the stability of foundation, the artificial composite soil can be subjected to tensile, compressive, shear or bending action. It is suitable for various soft foundations. The basic principle of reinforcement is to transfer the tensile stress in the soil to the reinforced body through the friction action between the soil and the reinforcement, and the reinforcement is subjected to pulling force. The stress and shear stress of the soil between the reinforcing bars can make the reinforcement and the soil in the reinforced soil play their respective roles. The common geotextiles include geogrids, geotextiles and geocell. In addition to geosynthetics and geogrids, geocell can delay or cut the sliding surface of foundation failure, so that the bearing capacity of foundation is improved. Moreover, geocell can in the soil compartment given three-dimensional constraint, the soil particles become a geocell
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