Drainage Consolidation Method With The Settlement Calculation In The Soft Clay Foundation And Construction Control

As an effective method of strengthening the soft soil, the drainage consolidation is widely used to treat the soft ground of airport, port, dock, highway, power plant, coal yard and so on. We have accumulated a wealth of experience in the practice and, at the same time confront some problems. This thesis attempts to probe into them. It contains these aspects as follow:1. Through the analysis of the settlement observations of soft foundation consolidation in the Pearl River Delta region, this thesis tries to find the best method of settlement calculation of this region.2. To optimize the loading process, at the base of the existing theories, the critical envelope curve equation is built, and according to it, the critical envelope curve of a case could be drawed. In the parctice, however, it's impossible to apply load as the curve. Under the ctitical curve, we can divided the whole load into different levels to apply.3. Using the existing theories of deformation and stability mechanism, the unsuitability of the in-use construction control index is studied. Because of the hard layer, the horizontal displacement of the soft soil can't be observed precisely. After the discuss of the inter-relationship between the horizontal displacement and the settlement, the author suggestes that the settlement which considers the engineering properties of soil to be the control index. Based on the researches of previous scholars, the expressions for calculating the settlement velocity are deduced to direct the construction. Through the calculation example, it is easy to find that the more levels are devided, the better.