Introduction of highway slope protection practice?

When it comes to highway slope protection practices, the relevant construction personnel are still relatively unfamiliar. What are the common construction methods for highway slope protection in China at this stage? What is the basic profile? The following are the basic contents of highway slope protection:

Through the knowledge collation of architectural knowledge column of this website, the basic situation of highway slope protection by Zhong Da Consulting is summarized as follows:

Slope is an important part of highway engineering. At present, there are many forms of slope protection in China, which can be divided into vegetation protection, engineering protection and comprehensive protection combining the two. Among them, vegetation protection types include: turf slope protection, three-dimensional vegetation net slope protection and vine slope protection. Zhong Da Consulting listed two types of highway vegetation slope protection and engineering project slope protection, which are basically summarized as follows:

Geocell vegetation slope protection is usually carried out according to the following steps:

(1) Before laying geocell, subgrade slope shall be cleaned and leveled according to the specification requirements.

(2) Geocells shall be laid along the slope from the shoulder to the bottom, and it is forbidden to extend continuously in the longitudinal direction-no more than 5 pieces shall be connected at a time in the longitudinal direction. The connection of two geocells should use special connectors.

(3) At the slope angle of the top surface of subgrade, an anchor nail is fixed inward at intervals of 25±62cm, the anchor nail depth is not less than 375px, the diameter of steel anchor nail is φ8mm ... The anchor nail depth of slope is 30cm, and the density is 1 /m2. Geocell is laid 50cm away from the bottom of the slope, filled with cohesive soil with plasticity index greater than 12, and then tamped manually to prevent displacement.

(4) Planting slope vegetation in the geocell.

Mortar rubble slope protection

Mortar rubble slope protection is the most widely used slope protection method in engineering, which mainly includes rubble slope protection and rubble retaining wall. Mortar rubble slope protection can prevent the slope from being washed by rain, and it also has a certain stabilizing effect on the slope. Retaining wall is a slope cover made of mortar rubble, which is used to close all kinds of soft rock strata and break excavation slopes, and is mostly used in strongly weathered soft rock strata and broken rock sections such as easily weathered mica schist, chlorite schist, argillaceous limestone and phyllite to prevent further weathering. It can effectively prevent slope erosion, sliding, flowing and rockfall slope collapse, and is the most common form of protecting the upper slope. The retaining wall does not bear other loads except its own weight, nor does it bear the earth pressure behind the wall, so the excavated slope protected by the retaining wall should meet the requirements of extremely stable slope. The construction technology of masonry slope protection is simple and it is a common form of slope protection. However, due to its single form and poor coordination with the environment, its application in modern highway slope protection tends to decrease.

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