CAJ | 학술논문

对于采用超长摩擦桩来控制建筑物沉降的超高层建筑，如何在试桩试验中较好地消除非有效段桩周侧向摩擦阻力，为大楼桩基设计提供可靠、准确的试验数据，一直困扰着广大工程建设者。依托天津高银117大厦试桩工程实际，研发了一套消除桩基非摩擦段侧向摩擦阻力的钢制双护筒装置。该双护筒长26m，由内外护筒组成，外护筒与周边土一起对内护筒形成侧向约束作用，内护筒在荷载作用下能有效与外护筒脱开并自由沉降，将42000kN的荷载顺利向下传递，实际应用效果良好。
대우채용초장마찰장래공제건축물침강적초고층건축，여하재시장시험중교호지소제비유효단장주측향마찰조력，위대루장기설계제공가고、준학적시험수거，일직곤우착엄대공정건설자。의탁천진고은117대하시장공정실제，연발료일투소제장기비마찰단측향마찰조력적강제쌍호통장치。해쌍호통장26m，유내외호통조성，외호통여주변토일기대내호통형성측향약속작용，내호통재하재작용하능유효여외호통탈개병자유침강，장42000kN적하재순리향하전체，실제응용효과량호。
Because pile test can provide reliable and accurate test data for the pile foundation design, the constructors has been plagued by the problem that how to relieve the side friction of non?effective section of test pile better in pile test for super?tall building of which the settlement is controlled by friction super?long pile. Based on the pile test of Tianjin Gaoyin 117 Building, a device of steel double protecting tube is developed to relieve the side friction of non?effective section of test pile. The double protecting tube is 26 meters long, which composes of internal and external protecting tube. The external protecting tube and the surrounding soil provide lateral restraint to the internal protecting tube. The internal protecting tube can detach with the external protecting tube and sink freely under load, which passes down 42 000kN loads smoothly. The application effect of the two kinds of innovative technology is good.