The settlement of single column, single pile, double pile, single row pile and sparse pile foundation with pile spacing greater than 6 times the pile diameter cannot be calculated by equivalent effect layered summation method. The new code for pile foundation (JGJ 94-2008) points out the problems of Geddes solution in foundation code and Shanghai code on the premise that mindlin method can calculate settlement. Geddes solution assumes that the friction force on the pile side acts on the pile shaft, and the reaction force at the pile end is expressed by concentrated force. Because the concentrated force of semi-infinite physical force will cause distortion of local solution, it will cause distortion when calculating settlement by layered summation method, especially when calculating settlement of single pile. JCCAD found and solved the problems when implementing the foundation code and Shanghai code, mainly considering its size effect, the pile side friction still acts on the pile side, and the pile end resistance still acts on the pile end as a surface load, which is not as simplified as manual calculation. In the progress calculation of the new code, we assist the code group in numerical analysis and table arrangement. When calculating the settlement of pile caps, we can't simply take the shape center of pile caps as the calculation point. When the center point is soil instead of pile, the settlement will be small, so the pile center closest to the center should be found as the calculation benchmark. The mindlin method is used to calculate the settlement in the code, but the corresponding coefficient is not given in the Code for Design of Building Foundation (GB50007-2002) and the Technical Code for Building Pile Foundation (JGJ 94-2008), which presents a problem for designers and tells them that the empirical coefficient is regional. JCCAD provides a modifiable parameter-"settlement calculation correction coefficient" when calculating settlement. JCCAD will give different calculation results according to different selection criteria. ZHR series rotary drilling rig produced by Zheng Hong Piling Machinery Co., Ltd. has a maximum hole diameter of 1.5-3M and a maximum hole depth of 60-90M. It is suitable for the construction of sandy soil, cohesive soil, silt, pebble bed, weathered rock and other strata, and is mainly used for infrastructure such as municipal, highway and bridge, industry, drilling and civil ground. Compared with the same type of rotary drilling rig, we are improving it. There are many discounts on buying rotary drilling rigs now, and the concessions are very strong. Our slogan is Zheng Hong: formation can't be drilled, and Zheng Hong is fully hydraulic. Classification of ZHR series rotary drilling rigs: ZHR 150, ZHR 180, ZHR200 and ZHR220. Wealth Assistant: Zhang Jingli Zheng Hong Piling Machinery Company sincerely hopes to cooperate with you and become our friends forever.