工程建设标准强制性条文CPECSB4房屋建筑部分（英文版）.doc

Section IV Survey and Ground Foundation Ground Survey 1.1 General Regulations Survey Specification for Rock and Soil Engineering GB 50021-94 Detailed survey shall provided detailed documents for rock engineering and technical parameters of rocks for design use in the light of different architectures or architecture groups. It shall also provide analysis and evaluation for rock engineering of architecture foundations and the proving of specific plans of foundation design, foundation treatment and the prevention and treatment of bad geological phenomenon as well. Followings are main works to be done: To obtain general layout plan of architecture with coordinates and terrain, the cleaned ground level of architectures, the nature, scale and structural features of the architecture, the possible type and size of foundation, the estimated depth of foundation and the special requirements for foundation design etc. To clarify the origin, type, distribution range, development trend and extent of hazards of bad geological phenomenon and to provide evaluation and technical parameters of rocks for the treatment. To clarify the type, structure, thickness, slope and engineering features of each layer of soil within the area of the architecture, calculate and evaluate the stability and bearing force of the foundation. For architectures need calculation for settlement, to provide parameters for calculation of foundation deformation. For locations where the seismic intensity exceeds or equals to 6 magnitude, the category of ground soil and the category of ground shall be classified. For locations where the seismic intensity exceeds or equals to 7 magnitude, the earthquake liquefaction of saturated sand soil and saturated powder soil shall be judged and the index of liquefaction shall be calculated. To clarify the concealment conditions for underground water. When making design for lowering water for foundation pits, it is also necessary to clarify the amplitude and regularity of wat