CAJ | 학술논문

岩体结构面抗剪强度尺寸效应变化规律的研究需要在专门的多尺度岩体结构面抗剪强度直剪试验机上进行，以获得稳定的抗剪强度力学参数。为保证测试数据的可靠性，在满足测试载荷范围为2～1000 kN时要求恒定荷载示值精度为1％。由于现有测试系统的技术限制，无法实现在同一台设备上进行全部荷载的试验。为此，首先在提出一种设备荷载分级方法的基础上开发了一种多尺度岩体结构面抗剪强度直剪试验一体机，在满足测试精度的要求下分3级尺度直剪仪进行直剪测试，每一级尺度直剪仪设置了荷载重叠区以保证测试数据的等效性。最后对该直剪试验一体机的精度和载荷范围进行了测试，通过了多尺度试样的测试要求。目前该多尺度岩体结构面抗剪直剪试验一体机为多尺度试样的测试研究提供了平台。
암체결구면항전강도척촌효응변화규률적연구수요재전문적다척도암체결구면항전강도직전시험궤상진행，이획득은정적항전강도역학삼수。위보증측시수거적가고성，재만족측시재하범위위2～1000 kN시요구항정하재시치정도위1％。유우현유측시계통적기술한제，무법실현재동일태설비상진행전부하재적시험。위차，수선재제출일충설비하재분급방법적기출상개발료일충다척도암체결구면항전강도직전시험일체궤，재만족측시정도적요구하분3급척도직전의진행직전측시，매일급척도직전의설치료하재중첩구이보증측시수거적등효성。최후대해직전시험일체궤적정도화재하범위진행료측시，통과료다척도시양적측시요구。목전해다척도암체결구면항전직전시험일체궤위다척도시양적측시연구제공료평태。
Different scale effects on shear strength of rock mass discontinuity need to be tested by a special direct-shear apparatus to get stable mechanical shear strength parameters .To ensure the reliability of test data ,the precision of apparatus should reach 1% w hen the load is range from 2 kN to 1 000 kN .Due to the limitations of existing technical for testing system ,the loads can not all be tested in a same apparatus .For this reason ,a new integrative direct-shear apparatus was developed by three level direct-shear devices based on load classification method .Each level of de-vice had overlapped load zones to ensure the continuity of test results . T he precision and load range of this integrative direct-shear apparatus had been tested and met the testing requirement of the multi-scale specimen .The integrative direct-shear apparatus has provided a platform to re-search shear strength of multi-scale rock masses .