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Protection method of cold region dispersive soil side slope

A slope and decentralized technology, applied in excavation, construction, infrastructure engineering, etc., can solve problems such as instability, erosion damage protection method engineering quantity, heavy rain erosion impact, etc., to achieve cost reduction, maintenance of natural landscape, good The effect of security and stability

Inactive Publication Date: 2014-06-18
HEILONGJIANG PROVINCIAL HYDRAULIC RES INST
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of frost heaving, instability and erosion damage encountered in the scattered soil slopes in the existing cold regions, as well as the problems that the existing protection methods have a large amount of work and are greatly affected by the erosion of rainwater, and provide a cold Protective methods for differentiating scattered soil slopes

Method used

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  • Protection method of cold region dispersive soil side slope

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0021] Specific implementation mode one: the protection method of a kind of cold region scattered soil slope of this embodiment is carried out according to the following steps:

[0022] 1. Pre-lay a layer of geotextile at the position where the composite material is to be laid. The geotextile is laid along the slope from the shoulder to the foot of the slope, and the lap length in the direction of water flow is not less than 20cm;

[0023] 2. Put the polyurethane binder and the crushed stone in a mixing machine for stirring and mixing, and stir until the polyurethane binder is evenly wrapped on the surface of the crushed stone to obtain a composite material; the quality of the polyurethane binder and the crushed stone The ratio is (2~3): 100; the diameter of the crushed stone is 5mm~30mm;

[0024] 3. Lay the composite material obtained in step 2 on the upper surface of the channel slope geotextile before curing to form a slope protection layer with an overall structure. The la...

specific Embodiment approach 2

[0036] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, the overlapping length in the direction of water flow is 20 cm to 25 cm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0037] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 2, the polyurethane binder and gravel are placed in a mixing machine for stirring and mixing. After stirring for 3 minutes to 5 minutes, a composite material is obtained. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a protection technology of a cold region dispersive soil side slope, in particular to a protection method of the cold region dispersive soil side slope. The protection method aims to solve the problems that frost heaving, stability losing and erosion damaging are prone to occurring in the cold region dispersive soil side slope, and an existing protection method is large in project amount and large in rain wash influence. The protection method comprises the steps that 1 a layer of geotechnical cloth is pre-laid at the position where a composite material is to be laid; 2 a polyurethane binder and gravel are mixed evenly to obtain the composite material; 3 the composite material obtained in the step 2 is laid on a channel side slope before solidification, wherein the laying thickness D satisfies the equation (please see the formula in the specifications), Hz refers to the effective wave height, R equals to 0,35, delta refers to the relative density of a slope protection layer, refers to a wave breaking parameter and is calculated according to the equation (please see the formula in the specifications), refers to the average wave length and alpha is the slope protection inclination; 4 a catch drain is excavate in the top of a channel; 5 the composite material obtained in the step 2 is laid in the foot fixing position at the bottom of the channel, and then protection of the cold region dispersive soil side slope is completed.

Description

technical field [0001] The invention relates to a protection technology for scattered soil slopes in cold regions. Background technique [0002] Dispersed clay (referred to as dispersed soil) is often called "high-sodium soil". The accumulation of soda and sodium chloride in groundwater and soil is the main reason for the formation of dispersed soil. Rainfall will cause a large amount of scattered soil slope Erosion damage, due to the influence of the natural environment, frost heaving and thawing in the northern region, after several freeze-thaw cycles, it will cause a large amount of frost heave damage to the scattered soil slope, which is the cause of channel slope instability in cold regions important reason. In engineering, how to reduce the erosion and frost heave damage of dispersed soil slope is the main factor to be considered in the treatment project of dispersed soil slope. [0003] At present, the protection method of scattered soil slopes in China is usually t...

Claims

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Application Information

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IPC IPC(8): E02D17/20
Inventor 刘丽佳张滨徐丽丽曲祥民陶琦孙景路
Owner HEILONGJIANG PROVINCIAL HYDRAULIC RES INST
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