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Predicating method for sinking depth of explosive compaction rockfill

A technology of depth prediction and explosion silting, which is applied in the field of infrastructure construction

Active Publication Date: 2019-10-08
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no way to predict the final subsidence depth of the rockfill except for drilling and geophysical prospecting.

Method used

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  • Predicating method for sinking depth of explosive compaction rockfill
  • Predicating method for sinking depth of explosive compaction rockfill
  • Predicating method for sinking depth of explosive compaction rockfill

Examples

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Embodiment example

[0042] In the Luoyuan Bay embankment soft foundation treatment explosion silting project in Lianjiang County, Fuzhou City, Fujian Province, the embankment above the mud surface is 8m high and 9.4m wide at the top, adopting the structural type of slope embankment. The geological condition of the embankment is poor, and there is a silt layer up to 30m thick. 39m, silty clay, yellowish brown, with a small amount of sandy soil in the upper part; ④Below 39m, silty clay, mixed with gravel.

[0043] During the process of desilting by explosion, the explosives are laid at the head of the embankment, the width of the explosives is 42m, the average buried depth of the charges is 15m, the distance between the charges is 2m, and the weight of a single charge is 36kg.

[0044] Take 50kg of typical rock samples on site, conduct a large-scale screening test, and obtain the average equivalent particle size d of the rock 50 is 0.21m; test the density of the block stone to get its density ρ 0...

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Abstract

The invention discloses a predicating method for the sinking depth of explosive compaction rockfill. The predicating method comprises the following steps: acquiring the mean equivalent grain sizes d50of block stones, acquiring the rockfill density [rho]<0>; acquiring the density rho, the cohesive force c and the internal friction angle of foundation soil at different depths, and calculating the density rho', the cohesive force c' and the internal friction force of the foundation soil subjected to explosive compaction, and calculating the sinking pressure f of the rockfill; calculating the sinking resistance pu of a foundation at different depths; and setting the depth zi, wherein the depth zi is positioned below an embedded explosive package, if the sinking pressure f of a part above thedepth zi is higher than the sinking resistance pu, f is larger than pu, and if the sinking pressure f of a part below the depth zi is not higher than the sinking resistance pu, f is smaller than or equal to pu, and the depth zi is the maximal sinking depth of the rockfill. The predicating method has the advantages as follows: the sinking depth of the explosive compaction treatment foundation rockfill can be predicated, the predicating is simple, the process is strong, and the result is reliable.

Description

technical field [0001] The invention relates to the field of infrastructure construction, in particular to a method for predicting the subsidence depth of foundation stone fill for explosive silting treatment. Background technique [0002] Explosive silting is an economical and practical method to deal with deep soft soil, especially underwater soft soil foundation. However, for deep soft soils, especially for coastal harbors where the silt is as thick as 30m, there are still some problems in this treatment technology, for example, it is difficult to completely replace the bottom of deep soft soils, that is, there is a mud-rock mixed layer, or there is a certain depth of undisplaced soft soil layer , the processing effect is not good. For the mud-rock mixed layer, the greater the depth, the lower the replacement rate of the rockfill, and the lower part of the rockfill will still sink slowly over time under the action of its own weight, so that the foundation bearing capacit...

Claims

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Application Information

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IPC IPC(8): E02D1/02E02D3/08
CPCE02D1/02E02D1/022E02D3/08
Inventor 常方强梁康康霍宁
Owner HUAQIAO UNIVERSITY
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