Research On Soil Infiltration Experiment And Engineering Application

In the direction of the development of urban river ecological regulation in the future, the infiltration technology will occupy an important position. In this paper, by using natural bentonite as raw material, two new types of eco-reducing materials, and 1hm2, have been developed, which has been developed by the laboratory experiments. The main research contents and conclusions are as follows:(1) through the indoor experimental study found that with natural sodium bentonite as a conditioner, effectively closed the gap between soil particles and improve the material permeability reducing performance. Research and development put forward the modified bentonite ecological infiltration material,and the formation of ecological infiltration engineering technology program. In this technology, the homogeneous aggregate clay content on the size of the mixed material reducing infiltration has little impact on performance, mixing uniformity and bentonite content is the main influencing factors, so the research and development of ecological reduction infiltration technology, main raw materials including from fine sand to clay of a variety of materials,favorable to achieve local materials, reduce the cost, and the construction is simple, and is easy to popularize. The material has the pure natural characteristic, the safety and environmental protection performance in the same kind of product has the advantage obviously. The proposed technique has the ability of resisting high head pressure, water quality purification and anti wet and dry alternation. It can keep the water body vertical connectivity,and can keep the river ecological restoration and water conservation requirements.(2)site monitoring shows that the soil infiltration(80% and 85% soil), the1.0m(200/0.6/200),, 5cm, 2.0~, 3.6mm, and 3.1mm, a little better than that of the waterproof coating and 5cm thick coated sand. Under the application of engineering scale, ecological reduction infiltration soil, ecological reduced infiltration of sand permeability coefficient is about 1.0 * 10-6cm/s, less than in lab and in the test experiment, and other reduced infiltration materials engineering application consistent performance and meets the requirements of the project. The utility of the construction process is simple, and the construction process is simple, and has practical engineering requirements.(3)comprehensive analysis show that attenuated the development of new ecological infiltration soil, ecological permeability reducing sand and supporting the infiltration reduction structure engineering application of advantage is obvious, for lake ecological restoration reduced infiltration ofwater conservation and the ecological health requirements, with good value of popularization and application, for river water area reduction infiltration treatment provides practical ecological infiltration reduction technology.In this study, using bentonite as ecology of rivers and lakes reduced infiltration material and some basic performance test and practical application of research work has been done. However, because of the limitations of the research conditions and the time, the development of the subject has left several aspects of regret.