Subtropical mountain highway subgrade slope stability protection method

Abstract

This invention discloses a method for protecting the stability of subtropical mountain highway subgrade slopes, comprising the following steps: soil collection from the subgrade slope; recording the soil strength of the subgrade slope section based on the plant root system and the soil's own strength capacity; collecting water-holding characteristics of the root system during the plant's growing season; marking subgrade slope soil information and classifying it according to the soil's own strength capacity to achieve an average value for the soil combined with different plants; reinforcing the slope by laying geogrids; and planting plants within the geogrids. This method for protecting the stability of subtropical mountain highway subgrade slopes, taking into account the characteristics of soil and plants in different subtropical mountain sections, plans the average soil strength after planting, thereby allowing different plants to be planted on different road slope sections, facilitating the construction of highway subgrade slope protection work.

Description

Technical Field

[0001] This invention relates to the field of roadbed edge skin technology, specifically a method for protecting the stability of roadbed slopes in subtropical mountainous areas. Background Technology

[0002] Currently, highway projects are characterized by long construction cycles, large investment scales, high technical difficulty, and numerous factors involved, making them a massive system engineering project. The rapid development of highway construction has greatly promoted local economic development and cultural progress. However, the large-scale earthwork projects during highway construction inevitably interfere with and damage the local natural ecosystem, mainly manifested in disrupting hydrological dynamics, causing soil erosion, polluting the ecological environment, damaging the structure and function of the ecosystem, and biodiversity. At the same time, carbon emissions in the transportation sector will be one of the core priorities for carbon neutrality.

[0003] Due to the subtropical mountainous climate, the protection of roadbed slopes has become a major challenge during the construction of highways. The varying soil moisture content in the subtropical mountainous areas significantly affects the protection of roadbed slopes, making it inconvenient to carry out roadbed slope protection work according to the subtropical mountainous climate. Summary of the Invention

[0004] The purpose of this invention is to provide a method for protecting the stability of roadbed slopes in subtropical mountainous areas, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for protecting the stability of subtropical mountain highway subgrade slopes, comprising the following steps:

[0006] (1) Soil sampling of roadbed slope: Based on the plant roots in the soil and the soil's own resistance strength test, record the soil resistance strength of the roadbed slope section.

[0007] (2) Collection of root water holding characteristics of roadbed slope plants during the growing season: Record the characteristics of plants on different road sections of the slope and record them according to the water holding capacity of the plant roots.

[0008] (3) Roadbed slope soil information marking: The slope soil is classified according to its own strength resistance, and the water retention capacity of plant roots is also taken into account to make the soil and different plants reach an average value.

[0009] (4) Reinforce the slope by laying geogrid: Lay geogrid so that the geogrid protrudes above the roadbed slope and fill the geogrid with sand and gravel.

[0010] (5) Planting and laying of geogrids: Planting is carried out in geogrids according to the average water holding capacity of soil and plant roots on different road sections.

[0011] Preferably, the soil strength resistance test is performed by testing the soil moisture content and looseness.

[0012] Preferably, when recording the plant characteristics of different road sections, it is necessary to record the evolution pattern of plant root systems.

[0013] Preferably, the height of the geogrid protruding from the slope is 15-20 cm, and the thickness of the sand and gravel filling is 3-5 cm.

[0014] Preferably, after the plants are planted in the geogrid, they are covered with non-woven fabric, and watered and fertilized regularly. When the plants grow to 5-8 cm, the non-woven fabric is removed.

[0015] Preferably, the spacing of the geogrid is 25 cm.

[0016] Preferably, after the soil of the roadbed slope is collected, the slope soil is leveled and compacted.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. Based on the characteristics of soil and vegetation in different sections of subtropical mountainous areas, the average soil strength after planting is planned, so that different plants can be planted on different road slopes, which facilitates the construction of highway subgrade slope protection work.

[0019] 2. Based on the soil conditions of different road sections in subtropical mountainous areas, different types of vegetation should be planned for planting to make the slope protection process more suitable for the local climate characteristics and enhance the effectiveness of roadbed slope protection.

[0020] 3. By conforming to the local climate and soil characteristics, the service life of the roadbed slope during protection is guaranteed. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example

[0022] This invention provides a technical solution: a method for protecting the stability of subtropical mountain highway subgrade slopes, comprising the following steps:

[0023] (1) Soil collection on roadbed slope: Based on the plant roots in the soil and the soil's own resistance capacity test, the soil resistance capacity test is to test the soil moisture content and softness, record the soil resistance capacity of the roadbed slope section, and after the roadbed slope soil is collected, the slope soil is leveled and compacted.

[0024] (2) Collection of water-holding characteristics of roots during the growth period of plants on the roadbed slope: Record the characteristics of plants on different road sections. When recording the characteristics of plants on different road sections, it is necessary to record the evolution of plant roots and record the water-holding capacity of the plant roots.

[0025] (3) Roadbed slope soil information marking: The slope soil is classified according to its own strength resistance, and the water retention capacity of plant roots is also taken into account to make the soil and different plants reach an average value.

[0026] (4) Reinforce the slope by laying geogrid: Lay geogrid with a spacing of 25 cm, so that the geogrid protrudes above the roadbed slope and fills the geogrid with sand and gravel. The height of the geogrid protruding above the slope is 15-20 cm, and the thickness of the sand and gravel filling is 3-5 cm.

[0027] (5) Planting and laying of geogrids: Plants are planted in geogrids according to the average water holding capacity of soil and plant roots on different road sections. After the plants are planted in geogrids, non-woven fabric is added and watered and fertilized regularly. When the plants grow to 5-8 cm, the non-woven fabric is removed.

[0028] This subtropical mountainous highway subgrade slope stability protection method makes the subgrade slope more stable during the protection process, ensures the uniformity of the protection effect, and facilitates the construction work during slope protection.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for protecting the stability of subtropical mountain highway subgrade slopes, characterized in that, Includes the following steps: (1) Soil sampling of roadbed slope: Based on the plant root system in the soil and the soil's own resistance strength test, record the soil resistance strength of the roadbed slope section; (2) Collection of root water holding characteristics of plants on roadbed slopes during the growing season: Record the characteristics of plants on different road sections of the slope, and record them according to the water holding capacity of the plant roots. (3) Roadbed slope soil information marking: The slope soil is classified according to its own strength resistance, and the water retention capacity of plant roots is also taken into account to make the soil and different plants reach an average value. (4) Reinforce the slope by laying geogrid: Lay geogrid so that the geogrid protrudes above the roadbed slope and fill the geogrid with sand and gravel. (5) Planting and laying of geogrids: Planting is carried out in geogrids according to the average water holding capacity of soil and plant roots on different road sections; The soil strength resistance test involves measuring the soil's moisture content and looseness.

2. The method for protecting the stability of subtropical mountain highway subgrade slopes according to claim 1, characterized in that: When recording the characteristics of plants in different road sections, it is necessary to record the evolution patterns of plant root systems.

3. The method for protecting the stability of subtropical mountain highway subgrade slopes according to claim 1, characterized in that: The geogrid protrudes 15-20 cm above the slope, and the sand and gravel filling is 3-5 cm thick.

4. The method for protecting the stability of subtropical mountain highway subgrade slopes according to claim 1, characterized in that: After the plants are planted in the geogrid, they are covered with non-woven fabric, and watered and fertilized regularly. When the plants grow to 5-8 cm, the non-woven fabric is removed.

5. The method for protecting the stability of subtropical mountain highway subgrade slopes according to claim 1, characterized in that: The spacing of the geogrid is 25 cm.

6. The method for protecting the stability of subtropical mountain highway subgrade slopes according to claim 1, characterized in that: After the soil samples from the roadbed slopes are collected, the slope soil is leveled and compacted.