Brief introduction of the latest edition of Code for Design of Building Foundation;
In order to implement the national technical and economic policies in foundation design, achieve safety, applicability, advanced technology, economy and rationality, ensure quality and protect the environment, the latest edition of Code for Design of Building Foundation is formulated. The current version (GB 50007-20 1 1) was revised on the basis of Code for Design of Building Foundations (GB50007—2002) and came into effect on August 20 12. The new code is divided into 10 chapter and 22 appendices. The main technical contents include: general rules, terms and symbols, basic provisions, geotechnical classification of foundation, engineering characteristic index, foundation calculation, mountain foundation, soft foundation, foundation pit engineering, inspection and monitoring. This topic mainly explains the design and calculation of construction enterprise foundation, mountain foundation, foundation pit engineering and engineering monitoring.
The latest revision of the latest edition of Code for Design of Building Foundations;
1. Add relevant contents of foundation pit engineering to the foundation design level;
2. The design service life of the foundation shall not be less than that of the building structure;
3. Add the engineering definitions of peat and peat soil;
4. Increase the calculation method of rebound recompression deformation;
5. Increase the calculation method of building anti-floating stability;
6. The design principle of soil-rock composite foundation is added, in which the underlying rock surface is unidirectional inclined, the slope of rock surface is greater than 10%, and the thickness of soil layer under the foundation is greater than1.5m;
7. Increase the design content of rock foundation;
8. According to the degree of karst development, increase the principle of site foundation design in karst areas;
9. Increase the calculation method of composite foundation deformation;
10. The design requirement that the minimum reinforcement ratio of the extended foundation is not less than 0. 15% is added;
1 1. The requirement for calculating the shear bearing capacity of inclined section is increased when the short side size of the bottom surface of the extended foundation is less than or equal to the column width plus 2 times the effective height of the foundation;
12. Through statistical analysis, the settlement empirical coefficient of pile foundation settlement calculation method is adjusted;
13. For the foundation pit engineering with high groundwater level, complex hydrogeological conditions on site, high requirements for environmental protection around the foundation pit and Grade A design level, special design requirements for groundwater control are added;
14. Increase the engineering inspection requirements of foundation treatment engineering;
15. The main points of single pile horizontal load test and single pile vertical uplift load test were added.
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