3　Basic Requirements

3.0.1　The quality inspection requirements for materials and products used in the construction of building subsoils，foundations，foundation pits and slope engineerings shall comply with current national standards and the design requirements.

3.0.2　Before construction of building subsoils，foundations，foundation pits and slope engineerings，the following data shall be provided：

1　Geotechnical investigation report；

2　Design documents required for construction of building subsoils，foundations，foundation pits and slope engineerings；

3　Data about buildings（structures），underground pipelines and obstacles within the influence scope of proposed engineering construction；

4　Construction organization design and special construction and monitoring schemes.

3.0.3　The axis control points and elevation bench marks for construction of building subsoils，foundations，foundation pits and slope engineerings shall be protected properly after rechecking and shall be re-surveyed regularly thereafter.

3.0.4　Before construction of foundation pit engineering，the preparation work shall be done well and such conditions as site hydrogeological conditions，adjacent underground pipelines，nearby buildings（structures）and underground obstructions shall be investigated.Corresponding measures shall be taken to protect adjacent underground pipelines，facilities and buildings（structures）.

3.0.5　During construction of building subsoils，foundations，foundation pits and slope engineerings，the influence of groundwater，surface water and spring tide shall be controlled.

3.0.6　Anti-freezing and drainage measures shall be taken for construction of building foundation engineering in winter or rainy season.

3.0.7　It is strictly forbidden to stack soils within the influence range of foundation pits（trenches）and buildings（structures）.

3.0.8　Excavation of foundation pit（trench）shall meet the following requirements：

1　The construction load for foundation pit（trench）around periphery and at sloping platform shall be controlled in accordance with the design requirements；

2　During excavation of foundation pit（trench），the staged excavation depths and temporary side slope shall be determined through analysis according to soil conditions；

3　Excavation construction conditions of foundation pit（trench）shall meet the design requirements.

3.0.9　Where dangers occur during construction，the emergency measures shall be immediately taken to control the danger case.

3.0.10　Where cultural relics and historic sites are encountered during construction，the construction shall be stopped immediately and such case shall be reported to the related authorities.

3.0.11　During construction of building subsoils，foundations，foundation pits and slope engineerings，the construction records shall be made well.