1. Retaining wall: refers to the structure that supports subgrade fill or hillside soil to prevent deformation and instability of fill or soil.

2. Retaining pile: also known as retaining cast-in-place pile support, it is suitable for excavation of large and shallow (less than 5m) foundation pit, and there are buildings nearby, and it is not allowed to slope or allow settlement and displacement of nearby foundation.

Second, the advantages are different.

1. Retaining wall: A shoulder wall or embankment wall is set under a high-fill embankment or steep-slope embankment, which can prevent the subgrade slope or basement from sliding, ensure the stability of subgrade, shrink the toe of fill slope, reduce the amount of fill, reduce the land occupied by demolition, and protect the existing buildings near the line;

2. Retaining pile: simple construction equipment. The required working site is small, the noise is low, the vibration is small, the cost is low, the pile rigidity is high, the bending strength is high, and the safety is good.

Third, the characteristics are different.

1. Retaining wall: the wallboard is prefabricated and assembled, and it is necessary to install anchor rods and pads to fix the wallboard. For the sake of wall stability and construction safety, the roller should not be too close to the wall plate. The wallboard can be tamped in layers by manual or small rammer.

2. Retaining pile: bad water seal. In order to prevent soil erosion, powder injection piles can also be added between cast-in-place piles. Around the excavated foundation pit, drill holes with a drilling rig, lower the reinforcing cage, and pour concrete piles on site. The pile spacing is 1~ 1.5m, and the upper part is provided with a coupling beam. Mechanical or artificial excavation in the middle of the foundation pit, dig to about 1m and then install the cross brace. Install tie rods on the back of the piles to fasten the existing anchor piles, and then continue to dig to the required depth.

Baidu encyclopedia-retaining wall

Baidu encyclopedia-retaining cast-in-place pile bracket