Method for simply calculating adjacent tamping point soil body fixing effect under heavy tamping effect

Abstract

The invention relates to the technical field of soil body fixing, in particular to a method for simply calculating the adjacent tamping point soil body fixing effect under a heavy tamping effect. Themethod comprises the following steps of obtaining soil body parameters in a heavy tamping fixing area and heavy tamping design parameters; according to the soil body parameters and the heavy tamping design parameters and through the combination of a heavy tamping numerical value model picture, obtaining the function relation of the relative compactness increment ratios, tamping energy per hammer striking, the tamping hammer radiuses, the tamping point spacing and the tamping frequencies of a soil body at different depths; according to the relative compactness increment ratio of the soil body at different depths, building the change relation of the relative compactness increment ratio along with the depths in the midpoint of the adjacent tamping points. The method is simple in principle, the fixing effect of heavy tamping method construction of the soil body can be scientifically calculated and predicted, the construction cost is saved, and the scientificity and the accuracy of a heavytamping construction parameter estimation value are improved.

Description

technical field [0001] The invention relates to the technical field of soil reinforcement, in particular to a method for simply calculating the soil reinforcement effect between adjacent ramming points under the action of dynamic compaction. Background technique [0002] The dynamic compaction method is widely used to reinforce the foundation soil with poor soil quality. Compared with other soil reinforcement methods, it has the characteristics of convenient construction and significant cost advantages. At this stage, the design of dynamic compaction is mainly based on the engineer's experience or empirical formula to estimate the construction parameters, and determine it through on-site test compaction. However, the existing empirical formulas mainly focus on the quantitative analysis of the construction parameters related to the scope of dynamic compaction and single compaction point. Therefore, it is very necessary to conduct quantitative research on the relationship be...

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Problems solved by technology

[0004] The existing empirical formulas mainly focus on the quantitative analysis of the construction parameters related to the size of the dynamic tamping reinforcement range and the single tamping point, and less attention is paid to the quantitative research on the construction parameters related to multiple tamping points, and they are only limited to the effective reinforcement depth of the dynamic tamping or the tamping point. Quantitative research on the relationship between pit depth and construction parameters, and dynamic compaction does not only reinforce the soil at the bottom of the compaction point, but also reinforces the soil within a certain range around the compaction point, so apply existing experience in the dynamic compaction design The accuracy of the construction parameters selected by the formula is poor, and repeated trial and tamping is required to correct the construction parameters, resulting in waste of construction costs

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