GB 50500-2013 第1.1条
| **Appendix A.** | **Earthwork (hotel foundation pit/pipe trench)**: Foundation earthwork excavation shall be calculated as the base cushion bottom area multiplied by the excavation depth, based on the dimensions shown on the design drawings. **Slope ratio**: For Class I and II soils with depth >1.2m, slope ratio 1:0.5; for Class III soils with depth >1.5m, slope ratio 1:0.33; for Class IV soils with depth >2.0m, slope ratio 1:0.25. |