Dolomite gravel soil roadbed filler based on orthogonal test design, and construction process thereof

An orthogonal test method, a technology of crushed stone, applied in the directions of roads, roads, buildings, etc., can solve the problems of not necessarily good gradation, the quality of roadbed cannot be guaranteed, and the composition of natural crushed stone soil is complex, etc. Alleviate financial pressure and reduce the effect of land acquisition

Inactive Publication Date: 2020-02-28
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems in the above-mentioned background technology that the material composition of natural gravel soil is complex, the gradation in the natural state is not necessarily good, and...

Method used

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  • Dolomite gravel soil roadbed filler based on orthogonal test design, and construction process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The present invention is a dolomite gravel mixture designed based on an orthogonal test method. The material is prepared from dolomite gravel, soil samples, mud and water, and the mass ratio of each component is: dolomite gravel : soil: mud content: water content = 1: 0.429: 0.014: 0.144.

[0025] In this embodiment, the maximum particle size of the dolomite gravel is 60mm.

[0026] In this embodiment, the soil sample is silty clay.

[0027] According to such scheme, the preparation method of described dolomite gravel soil may further comprise the steps:

[0028] 1), mix dry materials such as dolomite gravel, soil samples, mud at room temperature;

[0029] 2) Add water to the dry mixture mixed in 1), and stir quickly.

Embodiment 2

[0031] A kind of construction technique based on the earth-rock mixture of the dolomite crushed stone described in above-mentioned embodiment 1 design by orthogonal test method, comprises the following steps:

[0032] 1) Excavation of earth and stone: transport the dolomite gravel and silty clay that meet the requirements from the excavation area to the construction operation section on site;

[0033] 2) Mix dolomite gravel with silty clay in proportion and stir evenly, wherein the proportion of soil and rock is 60% to 80%, and the mud content in the soil is 1% to 3%;

[0034] 3) After drying the soil and flattening it, first measure whether the water content of the filler is within the range of the optimal water content ± 2%, otherwise it should be spread out to dry or add water evenly until the water content is within the range of the optimal water content ± 2%, and Stir well again;

[0035] 4) Filling, leveling and rolling.

Embodiment 3

[0037]

[0038] According to the composition ratio in the above table, the construction process is carried out according to the construction process of Example 2. In this example, the CBR value of dolomite gravel soil is 23.4, the roadbed has high bearing capacity, small deformation, strength meets the requirements of roadbed filling, and good durability.

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Abstract

The invention provides a dolomite gravel soil-stone mixture based on orthogonal test design, wherein the material is prepared from dolomite gravel, a soil sample, mud and water according to a ratio of1:0.429:0.014:0.144. The invention further discloses a construction process of the dolomite gravel soil-stone mixture. According to the invention, with the product, the problems that natural gravel soil is complex in substance composition, the grading is not good in a natural state, and the roadbed quality cannot be guaranteed in the filling process are mainly solved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a dolomite gravel soil subgrade filler based on an orthogonal test design and a construction process thereof. Background technique [0002] In Southwest my country, there are various types of geology and great differences in terrain elevation. The design and construction of highway engineering is often accompanied by high filling and deep excavation operations to achieve the effect of reducing longitudinal slopes. However, due to inconvenient transportation and high transportation costs in mountainous areas, it is too expensive to purchase roadbed filler from other places. Therefore, the earth and stone excavated in the construction section are often selected for filling, which not only saves the cost of roadbed materials, but also reduces the need for earth and rock spoils. Land acquisition for spoil sites can ease the financial pressure brought about by land acquisit...

Claims

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Application Information

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IPC IPC(8): C04B28/00E01C3/00
CPCC04B28/001E01C3/00C04B22/002C04B14/26
Inventor 俞建平
Owner CHINA MCC17 GRP
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