The load test device and load test manner null of the post by reaction force post

摘要

PURPOSE: To perform a load test by fitting jacks to the tip section and pile head of a test pile respectively, and connecting the test pile and surrounding reaction piles via a load beam so that the test pile can be lifted and extended to exert the peripheral friction force to the maximum. ;CONSTITUTION: Jacks 11, 12 are fitted to the tip section and head section of a test pile 10 respectively, and pressure is controlled for unloading and the like. The upper ends and lower ends of steel rods 15 protected by sheaths 17 are fixed to both end sections of a load beam 13 and anchors 16 at the tip sections of reaction piles 14 respectively, and the test pile 10 and the reaction piles 14 are connected by the load beam 13. The jack load of the jack 12 is measured by a load cell 19, and the upward displacement and the downward displacement of the head section and bottom section of the jack 12 are measured by displacement gauges. When the jack 11 is pressurized, the tip of the test pile 10 is lifted while the peripheral friction force on the jack 11 serves as reaction force, and the relationship between the tip load and settlement of the test pile 10 is obtained from the displacement of the bottom section of the jack 11 and the jack load. The relationship between the peripheral friction force and displacement of the test pile 10 is obtained from the jack load, the displacement of the pile head, and the displacement of the head section of the jack 12.;COPYRIGHT: (C)1995,JPO