The methods to control the stability of the side-slopes of construction foundation pits include artificial support to firm side-slopes,earth-supporting formwork,traditional nailed wall structure,and earth-supporting-pile wall structure,etc.

The key points of design and construction of the soil nailing wall support technique and its application results in the foundation pit slope project of the comprehensive building of Chinese Centre of Mitigating Natural Calamity are described.

The mechanical and mathematical model of Composite Soil Nailing(CSN) of foundation pit slope is established.

By the successful application of the anchor rod retaining technique in the foundation pit slope project at Fulin Mansion, Zhuzhou city, this paper introduces the essential points of the design and construction of this technique.

Based on the characters of rock construction slope with the assumptions that the slide surface is straight line,deducing the lateral pressure of inclined slope and two-step slope by limit equilibrium methods,establishing a general formula of the lateral pressure The formula can be used to strengthen the slope with anchors.

A synthetical analysis on the engineering information in building foundation pit;