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A prediction method for compressive strength of a stone body formed by reinforcing a loose gravel soil layer through floral tube grouting

A technology of grouting reinforcement and compressive strength, applied in the field of rock engineering, to achieve the effect of technical reliability and improvement of technical level

Inactive Publication Date: 2019-03-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no relevant reports and results on the quantitative prediction method of the compressive strength of concretions formed by using the flower tube grouting technology to reinforce the loose gravel soil layer at home and abroad.

Method used

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  • A prediction method for compressive strength of a stone body formed by reinforcing a loose gravel soil layer through floral tube grouting
  • A prediction method for compressive strength of a stone body formed by reinforcing a loose gravel soil layer through floral tube grouting
  • A prediction method for compressive strength of a stone body formed by reinforcing a loose gravel soil layer through floral tube grouting

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Experimental program
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Embodiment 1

[0029] Embodiment 1: A method for predicting the compressive strength of stone bodies formed by flower tube grouting to strengthen loose gravel soil layers, the specific steps are as follows:

[0030] (1) Measure the density ρ, water content ω and specific gravity G of the loose gravel soil layer to be reinforced S , and calculate the porosity φ of the loose gravel soil layer;

[0031] (2) According to step (1) density ρ, water content ω, specific gravity G of the loose gravel soil layer S and porosity φ select the grouting flower tube, measure the hole distance between the grouting holes on the side of the selected grouting flower pipe, and calculate the average hole distance l;

[0032] (3) Design grouting pressure p, grouting fluid water-cement ratio w and grouting time t, according to the formula of compressive strength of stone body

[0033] f cu =17.462p 0.143 w -0.685 l -0.141 t 0.036 no 0.442

[0034] Calculate the compressive strength F of the concretions for...

Embodiment 2

[0044] Embodiment 2: A method for predicting the compressive strength of stone bodies formed by flower tube grouting to strengthen loose gravel soil layers, the specific steps are as follows:

[0045] (1) Measure the density ρ of the loose gravel soil layer to be reinforced to be 1.73g / cm 3 , water content ω is 2.05% and specific gravity G S is 2.61, and the porosity φ of the loose gravel soil layer is calculated to be 0.35; the calculation formula of the porosity φ of the loose gravel soil layer is

[0046]

[0047] in, is the density of pure distilled water at 4°C, in g / cm 3 ; The unit of density ρ of loose gravel soil layer is g / cm 3 ;Moisture content ω is mass water content, %; specific gravity G S is a dimensionless number;

[0048] (2) According to step (1), the density ρ of the loose gravel soil layer is 1.73g / cm 3 , the water content ω is 2.05%, the specific gravity GS is 2.61 and the porosity φ is 0.35, and the grouting flower tube is selected (see figure ...

Embodiment 3

[0055] Embodiment 3: A method for predicting the compressive strength of stone bodies formed by flower tube grouting to strengthen loose gravel soil layers, the specific steps are as follows:

[0056] (1) Measure the density ρ of the loose gravel soil layer to be reinforced to be 1.56g / cm 3 , water content ω is 5.16% and specific gravity G S is 2.69, and the porosity φ of the loose gravel soil layer is calculated to be 0.45; the calculation formula of the porosity φ of the loose gravel soil layer is

[0057]

[0058] in, is the density of pure distilled water at 4°C, in g / cm 3 ; The unit of density ρ of loose gravel soil layer is g / cm 3 ;Moisture content ω is mass water content, %; specific gravity G S is a dimensionless number;

[0059] (2) According to step (1), the density ρ of the loose gravel soil layer is 1.56g / cm 3 , water content ω is 5.16%, specific gravity G S 2.69 and the porosity φ is 0.45 and the grouting flower tube is selected (see figure 2 ), measu...

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Abstract

The invention discloses a method for predicting the compressive strength of a stone body formed by reinforcing a loose gravel soil layer through floral tube grouting, and belongs to the technical field of rock engineering. The method comprises the steps of measuring the density, the water content and the specific gravity GS of the loose gravel soil layer needing to be reinforced, and calculating the porosity of the loose gravel soil layer; selecting a grouting floral tube according to the density, the water content, the specific gravity GS and the porosity of the loose gravel soil layer, measuring the hole distance between grouting holes in the side edge of the selected grouting floral tube, and calculating an average hole distance l; according to the designed grouting pressure p, the water cement ratio w of the grouting fluid, the grouting time t and the grouting stone compressive strength formula, calculating the compressive strength Fcu of the stone body formed by the floral tube grouting reinforced loose gravel soil layer. The method is reliable in technology, is simple and easy to implement, can be used as a theoretical basis for designing and predicting the compressive strength of the stone body formed by reinforcing the loose gravel soil layer through the floral tube grouting technology, and can provide theoretical support for grouting engineering practice.

Description

technical field [0001] The invention relates to a method for predicting the compressive strength of concretions formed by flower tube grouting to reinforce loose gravel soil layers, and belongs to the technical field of rock engineering. Background technique [0002] In China, the gravel soil layer is widely distributed; and a large number of infrastructure construction projects are prepared for construction, under construction and have been completed and put into operation on the gravel soil layer. Since the beginning of the new century, with the rapid development of the social economy, my country's demand for infrastructure construction such as water conservancy and hydropower projects, railways (high-speed rail), roads (expressways) and urban rail transit (subway) has been increasing. For example, by the end of 2015, my country's urban rail transit operating mileage was 3,300 kilometers; it is estimated that by 2020, the national urban rail transit operating mileage will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06
CPCG06Q10/04G06Q10/06393
Inventor 杨志全丁一杨溢朱颖彦韩用顺卢杰王渊杨文才丁攀
Owner KUNMING UNIV OF SCI & TECH
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