Device for negative friction resistance reduction and positive friction resistance transmission of precast pile and using method: Fid-Bau Portal

Device for negative friction resistance reduction and positive friction resistance transmission of precast pile and using method

XU FENQIANG / LI QINGHUI

Abstract

The invention discloses a device for negative friction resistance reduction and positive friction resistance transmission of a precast pile and a using method. The device comprises a first fixing part, a degradable disordered wire laminated fiberboard and a second fixing part which are sequentially arranged on the outer side of the precast pile from top to bottom; the first fixing part and the second fixing part are each provided with a cavity, the two cavities are connected through a sliding connecting rod, sliding parts are arranged at the two ends of the sliding connecting rod, and the sliding parts are limited in the cavities to slide up and down; and a porous permeation plate is arranged on the outer side of the degradable disordered filament laminated fiberboard and used for wrappingand fixing the degradable disordered filament laminated fiberboard to the outer side of the precast pile. The device and the method have the advantages that an existing precast pile foundation construction technology is enriched, and the device capable of reducing negative friction resistance of the precast pile and a use technology are developed; and by means of the degradable disordered filament laminated fiberboard, slippage is promoted, the negative friction resistance is further reduced, and the non-pollution and degradable effects are achieved.

本发明公开了一种预制桩负摩阻力减阻和正摩阻力传递的装置及使用方法，包括：在预制桩外侧从上至下依次设置的固定部一、可降解乱丝叠层纤维板和固定部二；所述固定部一和固定部二均设有空腔，两空腔之间通过滑动连杆相连，滑动连杆两端设有滑动部，滑动部被限位在所述空腔中上下滑动；所述可降解乱丝叠层纤维板外侧设有多孔渗透板，用于包裹固定可降解乱丝叠层纤维板在预制桩外侧。优点：丰富了现有预制桩基础施工技术，研制能够降低预制桩负摩阻力的装置和使用技术；通过可降解乱丝叠层织网纤维板，促进滑移进一步减小负摩阻力，且无污染可降解。

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