单桩复合地基静载荷试验系统的设计与应用研究

复合地基是通过褥垫层的调整作用，充分发挥桩间土的承载作用，使桩土共同承担荷载的地基。基于复合地基的实际工况，设计了一种单桩复合地基静载荷试验系统，既体现了褥垫层的调整作用，又可测得复合地基中桩体、桩问土、复合地基的荷载与其相应的沉降，同时可得出复合地基受力过程中桩土荷载分配过程与桩土应力比，提示了复合地基工作机理。通过工程实例测试，探讨了复合地基的工作机制，为复合地基的科研、设计与检测提供了依据。

The Design and Application of Single Pile Composite Foundation Static Loading Testing Set

In order to obtain the composite foundation practical work state, which acts by cushion adjusting and by pile and soil hearing load together, single pile composite foundation static loading testing set is designed. It is used to test composite foundation characteristic value of composite foundation bearing capacity, characteristic value of pile and characteristic value of soil in piles containing cushion. This set can obtain the settlements of pile, soil in piles, and composite foundation and load sev- erally, and can make the results of distribution of load in piles and soil in piles under composite foundation load, and can acquire the pile—soil stress ratio, which displays working mechanism of composite foundation. At last, through the practical testing used single pile composite foundation static loading testing set, the composite foundation, pile and soil in piles working state are discussed respectively, which can be used practically in scientific research, practical design and technical testing of composite foundation.