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A Method for Predicting Subsidence Depth of Explosive Squeezing and Rock Filling

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

Active Publication Date: 2021-03-09
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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  • A Method for Predicting Subsidence Depth of Explosive Squeezing and Rock Filling
  • A Method for Predicting Subsidence Depth of Explosive Squeezing and Rock Filling
  • A Method for Predicting Subsidence Depth of Explosive Squeezing and Rock Filling

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 rockfill samples on site, conduct large-scale screening tests, and obtain the average equivalent particle size d of rockfill 50 is 0.21m; the density of the rockfill is tested to obtain its dens...

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Abstract

The invention discloses a method for predicting the subsidence depth of rock filling by explosive squeezing silt, comprising: obtaining the average equivalent particle diameter d of rock filling 50 ; used to obtain the rockfill density ρ 0 ; Used to obtain the density ρ, cohesion c and internal friction angle of the foundation soil at different depths to calculate the density ρ', cohesion c' and internal friction angle of the foundation soil after the explosion squeezed silt; calculate the subsidence pressure of the rockfill f; Calculate the subsidence resistance p at different depths of the foundation u ;set depth z i , the depth z i Located below the buried explosive charge, if at the depth z i The above subsidence pressure f is greater than the subsidence resistance p u , ie f>p u , while at the depth z i The following subsidence pressure f is not greater than the subsidence resistance p u , that is, f≤p u , then the depth z i is the maximum subsidence depth of rockfill. It has the following advantages: it can predict the subsidence depth of the rockfill foundation treated by explosive silting, and the prediction 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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Patent Type & Authority Patents(China)
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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