Vacuum combined surcharge preloading method settlement volume measurement method

Abstract

The invention discloses a vacuum combined surcharge preloading method settlement volume measurement method. The consolidation coefficient C[td] of each working state time interval is obtained by each settlement volume measured value s[it] of a plurality of working state time intervals; a mathematical average value is obtained by the consolidation coefficients C[td] of all the working state time intervals, so that an equivalent consolidation coefficient C'[v] is obtained, the consolidation degree U of the foundation soil layer at any moment can be solved in the consolidation process, and finally, the consolidation degree of the foundation soil layer at any moment can be solved. The settlement volume measurement method disclosed by the invention is simple, convenient and feasible, measurement accuracy can meet project actual requirements; only basic soil engineering parameters of the foundation soil layer are required to effectively calculate the consolidation settlement volume of a vacuum combined surcharge method soil body at any moment; the measurement method can be used for accurately calculating the settlement volume of a site, a road or similar conditions, accordingly, fill quantities can be accurately estimated during preloading method construction, the measurement method has a certain guide meaning for design and construction, thus the project quality is ensured, and the time limit of the project can be reasonably estimated in advance.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a method for measuring the settlement of vacuum combined surcharge preloading method. Background technique [0002] At present, various soft soil strata are widely distributed in coastal areas and inland plains or mountainous areas of our country. Soft soil strata are characterized by high water content, high compressibility, low strength, and poor water permeability. Due to its low strength, the bearing capacity and stability of the foundation often cannot meet the engineering needs. Sites, roads or other similar filling projects on soft soil foundations often use preloading methods for foundation treatment. [0003] Vacuum combined surcharge preloading method is a combination of vacuum preloading and surcharged preloading. First, according to the process requirements of vacuum preloading, lay the film, bury the pipe, and dig the trench. When the vacuum under the film i...

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Problems solved by technology

However, this consolidation equation needs to use more geotechnical parameters to participate in the calculation, and in the actual engineering situation, due to the complex nature of the soil itself, the defects of geotechnical experiments and other factors, it is impossible to accurately provide the corresponding parameters that meet the actual situation, and the actual engineering and Biot consolidation There are some differences in the boundary conditions of the theory, and the calculation can only be simplified, which leads to a great difference between the theoretical calculation results and the actual situation.

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