A number of tests have been conducted to investigate response of vertically loaded capped pile groups in sand undergoing uniform lateral soil movement. The development of shear force, bending moment and deflection along the piles was measured. Presented in this paper are 4 tests on 2-pile free-standing groups, with a view to establish solutions for predicting the pile response. It was concluded that (1) maximum bending moment Mmax is largely linearly related to the sliding force Tmax in stable and moving layers; (2) The combined impact of pile-cap fixity, soil movement profiles, and axial load may be quantified by a single moment (Mo); (3) Each pile in a group behaves as free-head in stable layer or semi-fixed head in sliding layer, with a floating base; and (4) The previous solutions for single piles were extended to simulate Mmax and Tmax for piles in groups. In this paper, typical test results are presented for instrumented model piles in 2-pile groups in sand, subjected to a uniform lateral soil movement and an axial load. They are analyzed to indicate the impact of the thickness of the movable soil layer, axial load, and pile-cap fixity. The linear relationship between the Mmax and the thrust Tmax was explored, which renders the solutions for single piles to be extended to piles in groups.