1, slope excavation
It is suitable for the construction with open space and no important buildings around. Good stability, low cost and fast construction progress, but a lot of earthwork is needed for backfilling. If it is in the rainy season, the project is easily soaked and partially collapses.
2. Cement mortar is laid on the west retaining wall.
It is a cement-soil retaining wall structure formed by deep mixing. There is no support in the pit, so it can be excavated directly by machinery. It has the functions of retaining soil and stopping water. Its thickness is large and it is easy to produce displacement, so it is suitable for long foundation pit support.
3. High pressure jet grouting pile
The high-pressure rotary nozzle is used to spray cement slurry into the soil layer and stir it to form a solid, which is in the form of piles and has the function of retaining soil and stopping water, and is suitable for foundation pit support with small space.
4. Channel steel sheet pile
The retaining wall made of channel steel is combined side by side, and it is durable and reusable. It has no resistance to fine particles in water and soil, and is suitable for shallow foundation pits with a depth of less than 4m.
5, bored pile
It has the characteristics of high bearing capacity and small settlement, and is widely used in soft clay and sandy soil areas, and can be used in foundation pit engineering with a depth of 7- 15m.
6. Water-resisting wall
It is a supporting form with good structural stability and high rigidity, and can be used for foundation pits with poor geological conditions and high requirements for depth and surrounding environment.
7. Soil nailing wall
Used in areas with good soil quality, only suitable for shallow foundation pits. If the deformation control is strict, prestressed anchor or anchor cable should be added for reinforcement.
8.SMW construction method
Also known as rigid cement-soil mixing pile, H-beam is inserted into cement-soil pile, which is a kind of stress-resistant supporting structure and suitable for foundation pit support such as cohesive soil and sandy soil.