When it comes to subgrade design, the relevant architects are still relatively unfamiliar. What is the basic overview of subgrade design? What are the common design methods in subgrade design? The following are the basic contents of subgrade design provided by Zhong Da Consulting for architects. The specific contents are as follows:

Through the knowledge collation of the architectural knowledge column of this website, Zhong Da consulted and compiled the following related contents of highway subgrade design:

Subgrade Design Manual is a necessary reference book for highway technicians, and can also be used as a teaching material for training highway technicians. It can also be used as a reference for engineers and technicians engaged in urban roads, dense roads, factories and mines, and teachers and students majoring in highways in related universities.

General subgrade design methods mainly include: (1) dredging silt; (2) riprap construction; (3) Replacement construction (sand and gravel); (4) plastic insert drainage consolidation method, in which the riprap construction content is as follows:

(1) construction technology and requirements

1. Remove the roots and other decaying plants in the pond and measure the throwing position.

2. Dumping and filling: Dump trucks will dump and fill layer by layer, and bulldozers will assist in leveling. When the stratum under silt or soft soil is flat, it is thrown layer by layer from the middle of the foundation to both sides. When the cross slope of silt or soft soil stratum is steeper than 1∶ 10, it will be thrown from the high side to the low side, and it will be thrown to the ultra-wide low side slope, so that a platform will appear about 2m away from the foot of the fill slope.

3. Leveling: When the riprap exceeds the design elevation by 0.2m, manually level it with smaller stones to ensure that it reaches the design elevation after rolling.

4. Rolling: on the flat riprap, roll it with a cam roller of more than 20 tons, and the rolling times shall be determined by the test.

5. Gravel cushion and gravel cushion should be filled between rockfill and riprap, and their thickness should meet the design requirements.

(2) Quality inspection

1, choose the sheet that meets the design requirements and is not easy to weather.

2. The top surface of cast-in-place fill is compacted tightly, and the gap between stones is dense. K30 bearing plate is tested according to the specified point and meets the quality standard.

3. The elevation of riprap edge and top surface meets the error standard.

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