CN-116378073-B - Method for protecting stability of highway subgrade slope in subtropical mountain area

Abstract

The invention discloses a method for protecting the stability of a highway subgrade slope in a subtropical mountain area, which comprises the following steps of collecting soil of the subgrade slope, detecting according to plant root systems in the soil and the resistance capability of the soil, recording the soil resistance capability of a subgrade slope section, collecting the water holding characteristic of the root systems in the growing period of the subgrade slope plants, marking the soil information of the subgrade slope, grading by combining the resistance capability of the slope soil, enabling the soil to be combined with different plants to reach an average value, paving a geogrid, reinforcing the slope, planting the plants and paving the geogrid. The method for protecting the stability of the highway subgrade slope in the subtropical mountain area combines the characteristics of soil in different road sections of the subtropical mountain area and plants on the soil, and plans the average value of the soil strength after the plants are planted in the soil, so that different plants can be planted on the slope of different road sections, and the construction of the highway subgrade slope protection work is facilitated.

Inventors

• ZHANG ZHAN
• ZHENG GUORONG
• ZHANG XIUFENG

Assignees

• 中南林业科技大学

Dates

Publication Date

20260505

Application Date

20230515

Claims (6)

1. 1. The method for protecting the stability of the highway subgrade slope in the subtropical mountain area is characterized by comprising the following steps of: (1) The soil collection of the roadbed slope, namely, detecting according to plant root systems in the soil and the anti-strength capability of the soil, and recording the soil anti-strength capability of the roadbed slope section; (2) Recording plant characteristics on different sections of the slope, and recording according to root water retention of plants per se; (3) Grading the soil information marks of the roadbed slope by combining the resistance capability of the slope soil, and simultaneously combining the water retention capacity of plant roots to ensure that the soil combines different plants to reach an average value; (4) Paving a geogrid to strengthen the side slope, namely paving the geogrid to enable the geogrid to leak out of the height of the roadbed slope, and filling sand and stones in the geogrid; (5) Planting plants in the geogrid according to the average value of the water holding capacity of soil and plant roots combined on different road sections; the soil strength resistance is detected as the water content and the softness of the soil.
2. 2. The method for protecting the stability of the expressway roadbed slope in the subtropical mountain area according to claim 1, wherein the method is characterized in that the evolution rule of plant root systems is required to be recorded when the plant characteristics of different road sections are recorded.
3. 3. The method for protecting the stability of the highway subgrade slope in the subtropical mountain area according to claim 1, wherein the height of the geogrid leakage slope is 15-20CM, and the sand filling thickness is 3-5CM.
4. 4. The method for protecting the stability of the expressway roadbed slope in the subtropical mountain area according to claim 1, wherein the non-woven fabric is covered after the plants are planted in the geogrid, watering and fertilizing are carried out regularly, and the non-woven fabric is taken out after the plants grow to 5-8 CM.
5. 5. The method for protecting the stability of the highway subgrade slope in the subtropical mountain area according to claim 1, which is characterized in that: the distance between the geogrids is 25CM.
6. 6. The method for protecting the stability of the highway subgrade slope in the subtropical mountain area according to claim 1, wherein after the soil collection of the subgrade slope, the soil on the side slope is leveled and compacted.

Description

Method for protecting stability of highway subgrade slope in subtropical mountain area Technical Field The invention relates to the technical field of roadbed side skin, in particular to a method for protecting the stability of a highway roadbed slope in a subtropical mountain area. Background At present, the expressway project has long construction period, large investment scale, high technical difficulty and multiple related factors, is a huge system project, the rapid development of expressway construction greatly promotes the local economic development and cultural progress, but in the process of constructing the expressway, the large-scale earth-rock project inevitably produces interference and damage to the local natural ecological system, and the problems of hydrologic dynamic damage, water and soil loss initiation, ecological environment pollution, ecological system structure and function damage, biodiversity and the like are mainly manifested, and meanwhile, the carbon emission problem in the transportation field is one of the key works of carbon neutralization. The protection of the roadbed slope becomes a great difficulty in the construction process of the expressway due to the meteorological reasons of the subtropical mountain area, the water content difference of the soil is large in the protection process of the roadbed slope due to the meteorological reasons of the subtropical mountain area, the influence on the roadbed slope in the protection process is large, and the construction work of the protection of the roadbed slope according to the climate of the subtropical mountain area is inconvenient. Disclosure of Invention The invention aims to provide a method for protecting the stability of a highway subgrade slope in a subtropical mountain area, which aims to solve the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme that the method for protecting the stability of the highway subgrade slope in the subtropical mountain area comprises the following steps: (1) And (3) collecting soil of the roadbed slope, namely detecting according to plant root systems in the soil and the anti-strength capability of the soil, and recording the soil anti-strength capability of the roadbed slope section. (2) The water holding characteristic of root system in plant growth period of roadbed slope is collected by recording plant characteristics on different road sections of the slope and recording according to root water holding capacity of plant. (3) And (3) grading the soil information marks of the roadbed side slope by combining the resistance capability of the side slope soil, and simultaneously combining the water retention capacity of plant roots to ensure that the soil combines different plants to reach an average value. (4) And (3) paving the geogrid to strengthen the side slope, namely paving the geogrid to ensure that the geogrid leaks out of the slope height of the roadbed, and filling sand and stones in the geogrid. (5) In the geogrid where plants are planted and paved, the soil and plant root water holding capacity are planted in the geogrid according to the average value of the soil and plant root water holding capacity combined on different road sections. Preferably, the soil strength resistance is measured as the moisture content and softness of the soil. Preferably, the plant root system evolution law needs to be recorded when the plant characteristics of different road sections are recorded. Preferably, the height of the geogrid leakage slope is 15-20CM, and the sand filling thickness is 3-5CM. Preferably, the non-woven fabric is covered after the plants are planted in the geogrid, watering and fertilizing are carried out regularly, and the non-woven fabric is taken out after the plants grow to 5-8 CM. Preferably, the distance between the geogrids is 25CM. Preferably, after the soil of the roadbed slope is collected, the soil of the side slope is leveled and compacted. Compared with the prior art, the invention has the beneficial effects that: 1. by combining the characteristics of the soil in different road sections of the subtropical mountain area and the plant on the soil, the average value of the soil strength of the soil after the plant is planted is planned, so that different plants can be planted on different road section slopes, and the construction of highway subgrade slope protection work is facilitated. 2. Different plants are planted according to the soil of different road sections in the subtropical mountain area, so that the slope accords with the local climate characteristics in the protection process, and the effect of the roadbed slope in the protection process is enhanced. 3. After meeting the characteristics of local climate, soil and the like, the service cycle of the roadbed slope in protection is ensured. Detailed Description The technical solutions of the embodiments of the present invention will b