The authors suggest that the halved jacking pipe of which the internal diameter is larger than 3.0m has two radial joints on circumference. The joints are arranged at clockwise 45degree by turns. Meanwhile, it is possible for joints to suffer from eccentric loads by pipe deformation due to friction between soil and a pipe. This state is likely to increase if the jacking pipes go forward on curve and meander alignment. Therefore, the joint specification must be determined by analyzing loads distribution to the radial joints. Then the jacking pipe test on the S shaped curve alignment was carried out with halved pipe models. And the test results have led to evaluate section forces to the halved jacking pipes accurately.