The Method of Determining the Compaction Degree of Embankment Filling after Dynamic Compaction According to the Ramping Settlement

Abstract

The invention discloses a method for determining the filling compaction degree of a dynamically-compacted embankment according to compaction subsidence. By adopting the method, the average compaction degree of the embankment can be rapidly acquired on site, and the reinforcing effect after dynamic compaction is then evaluated. The method comprises the steps that the reinforcing mode for dynamic compaction is simplified to be cylindrical; then an on-site embankment dynamic compaction influence depth H and the diameter L of a dynamic compaction influence range are determined; therefore the volume V of the dynamic compaction ramming influence is calculated; then a filling sample of the embankment before ramming is acquired, and the compaction degree of the on-site embankment before dynamic compaction is calculated; then the depth of a compaction pit and the diameter of a compaction rammer are detected on the on-site embankment after dynamic compaction, so that the volume of the compaction pit is calculated; and then the compaction degree is calculated according to the change of the volume of filling before and after ramming. By adopting the method for determining the filling compaction degree of the dynamically-compacted embankment according to the compaction subsidence, the detection efficiency for foundation dynamic compaction reinforcing quality is improved; the construction cost is lowered; the reinforcing effect of dynamic compaction can be evaluated in time; and repeated construction is avoided.

Description

technical field [0001] The invention relates to a method for evaluating the reinforcement effect of embankment reinforced by dynamic ramming, in particular to a method for determining the compaction degree of embankment filling soil after dynamic ramming according to the amount of ramming settlement. Background technique [0002] It is known that the high embankment has a large self-weight stress, a high stress level and a large settlement caused by the compression of the fill itself, and the settlement is common, especially the problem of uneven settlement of the embankment 2. It is a commonly used engineering treatment measure to eliminate the settlement of embankment 2 in advance by adopting dynamic compaction method for reinforcement treatment when building high embankment 2 . [0003] The detection of the effect of dynamic compaction after dynamic compaction is an important part of dynamic compaction construction. At present, the main methods used at home and abroad inc...

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Problems solved by technology

[0003] The detection of the effect of dynamic compaction after dynamic compaction is an important part of dynamic compaction construction. At present, the main methods used at home and abroad include dynamic sounding, load test, wave velocity test, and compaction detection. The conventional test method takes a long time. costly

At the same time, due to the large impact depth of dynamic compaction, the in-situ test can only give the reinforcement quality at a certain number of sampling points, and cannot evaluate the reinforcement effect within the entire impact range of dynamic compaction.

The detection of the degree of compaction after dynamic compaction is generally taken from the surface of the filled soil, which cannot reflect the change of the degree of compaction within the entire impact range of dynamic compaction. The compaction test is not very accurate due to the loosening of the fill surface after dynamic compaction

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