Before a professional highway guardrail piling machine enters the construction site, you need to thoroughly understand the local environment and soil conditions and then develop a construction plan. Common soil characteristics are:

1. Soft Clay (Soft Soil): Soft clay is a type of soft, sticky soil, also known as soft soil, found in coastal areas, mid to lower reaches of rivers, and near lakes.

2. Physical Properties of Soft Clay: High clay content, usually with a plasticity index (Ip) greater than 17, indicating a sticky soil type, typically dark gray or dark green, with a high odor and water content (usually greater than 40%, with sludge water content often exceeding 80%); the porosity of soft clay usually ranges between 1.0 and 2.0, where clay porosity is 1.0 to 1.5, and sludge porosity is greater than 1.5. Soft clay features low strength, high compressibility, low permeability, and high sensitivity.

Mechanical Properties of Soft Soil: Based on the properties of soft soil, soft soil layers are ordinary solid soil or slightly over-consolidated soil, but some layers, especially newly deposited layers, can be considered low-viscosity clay. A small coefficient slows down the increase in compressive strength, compressive stability, and foundation strength, severely limiting the methods and effectiveness of foundation treatment. Soft clay foundations have low bearing capacity, slow strength increase; post-loading deformation is difficult and uneven; significant strain, long establishment time; characterized by low permeability, thixotropy, and large rheology common to soft soil foundations, with methods like preloading, displacement, and mixing used for treatment.

3. Peat Soil: Peat soil forms when the organic content in the soil (including organics and peat soil) exceeds a certain content. The higher the organic content, the greater its impact on soil quality, the lower the strength and compressibility of peat soil, and the different impacts it has on other engineering materials, which can adversely affect direct construction or foundation treatment. If necessary, the foundation must be treated first.

4. Mountainous Area Foundation Soil: The geological conditions of foundation soil in mountainous areas are still relatively complicated. Especially due to natural and environmental impacts on the foundation, the unevenness and instability of the foundation will form large boulders on the foundation. Natural disasters such as landslides and landslips might occur in outdoor environments, which could directly or indirectly affect or potentially threaten buildings. When constructing in mountainous areas, special attention should be paid to site environmental factors and adverse geological phenomena. The foundation should be carefully assessed and, if necessary, covered before constructing buildings.