Piled raft is the most desirable foundation option in the recent era for offshore and onshore structures which are often exposed to combined vertical and lateral (V-L) loads. Due to the scarcity of literature, this study aims to comprehend the response of the piled raft foundation (PRF) under combined vertical and lateral loads. A series of laboratory experiments and finite element analysis has been executed on a two layered soil profile. The lateral response of PRF and the piles attached to PRF are evaluated under combined V-L loading action and the consequences of the pile positioning on lateral load capacity are observed. From the structural point of view, bending moment and shear force are also estimated and the lateral load sharing between the raft and the piles are evaluated. The results attained from the tests indicate that the presence of vertical load has both positive and negative impact on the lateral load capacity of PRF depending up on the soil profile. A nonlinear multiple regression (NMR) analysis is also performed for the lateral load sharing behaviour and some empirical formulae are proposed to identify the lateral load sharing ratio which will enhance the design of PRF under combined V-L loading.

对于近海和陆上结构而言，桩筏是近代最理想的基础选择，这些结构通常承受垂直和横向（VL）组合载荷。由于文献的稀缺性，本研究旨在理解桩筏基础在竖向和横向荷载作用下的响应。在两层土壤剖面上进行了一系列的实验室实验和有限元分析。在组合的VL荷载作用下评估了PRF和附加在PRF上的桩的横向响应，并观察了桩定位对横向荷载能力的影响。从结构的角度，还估算了弯矩和剪力，并评估了木筏和桩之间的侧向载荷。从测试中获得的结果表明，垂直荷载的存在对PRF的横向荷载能力既有正面影响，也有负面影响，具体取决于土壤剖面。还针对侧向载荷分配行为进行了非线性多元回归（NMR）分析，并提出了一些经验公式来确定侧向载荷分配比，这将增强组合VL载荷下的PRF设计。