岩石力学与工程学报
巖石力學與工程學報
암석역학여공정학보
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
2009年
z2期
3609-3625
,共17页
曾宪明%林大路%李世民%左魁%徐孝华%杜宁波
曾憲明%林大路%李世民%左魁%徐孝華%杜寧波
증헌명%림대로%리세민%좌괴%서효화%두저파
岩土工程%锚固类结构%临界锚固长度%综合研究
巖土工程%錨固類結構%臨界錨固長度%綜閤研究
암토공정%묘고류결구%림계묘고장도%종합연구
geotechnical engineering%anchorage structure%critical anchorage length%comprehensive re
锚固类结构杆体临界锚固长度是指一定岩土介质中锚固类结构杆体的极限锚固长度,超过此长度,其承载力将不再明显增加;未达此长度,其承载力尚有一定潜力可挖.数十年来,特别是近10 a来,国内以不同的方法,从不同的侧面对锚固类结构杆体临界锚固长度问题进行研究,取得若干成果.对其中较典型的研究成果作评述和再分析,着重指出:系统的研究仍较为缺乏,直接的研究较为少见,仍处于局部发现问题局部探讨解决的阶段;临界锚固长度现象是普遍存在的,对此问题的透彻研究,将对现行国内外基于平均剪应力概念和方法的设计理论提出严重质疑和挑战,并最终将导致锚固类结构传统设计理念的根本性变化;临界锚固长度现象的发现,国外早于我国10多年时间,但作为专用的具有明晰概念的名词"临界锚固长度",目前尚无此称谓.
錨固類結構桿體臨界錨固長度是指一定巖土介質中錨固類結構桿體的極限錨固長度,超過此長度,其承載力將不再明顯增加;未達此長度,其承載力尚有一定潛力可挖.數十年來,特彆是近10 a來,國內以不同的方法,從不同的側麵對錨固類結構桿體臨界錨固長度問題進行研究,取得若榦成果.對其中較典型的研究成果作評述和再分析,著重指齣:繫統的研究仍較為缺乏,直接的研究較為少見,仍處于跼部髮現問題跼部探討解決的階段;臨界錨固長度現象是普遍存在的,對此問題的透徹研究,將對現行國內外基于平均剪應力概唸和方法的設計理論提齣嚴重質疑和挑戰,併最終將導緻錨固類結構傳統設計理唸的根本性變化;臨界錨固長度現象的髮現,國外早于我國10多年時間,但作為專用的具有明晰概唸的名詞"臨界錨固長度",目前尚無此稱謂.
묘고류결구간체림계묘고장도시지일정암토개질중묘고류결구간체적겁한묘고장도,초과차장도,기승재력장불재명현증가;미체차장도,기승재력상유일정잠력가알.수십년래,특별시근10 a래,국내이불동적방법,종불동적측면대묘고류결구간체림계묘고장도문제진행연구,취득약간성과.대기중교전형적연구성과작평술화재분석,착중지출:계통적연구잉교위결핍,직접적연구교위소견,잉처우국부발현문제국부탐토해결적계단;림계묘고장도현상시보편존재적,대차문제적투철연구,장대현행국내외기우평균전응력개념화방법적설계이론제출엄중질의화도전,병최종장도치묘고류결구전통설계이념적근본성변화;림계묘고장도현상적발현,국외조우아국10다년시간,단작위전용적구유명석개념적명사"림계묘고장도",목전상무차칭위.
The critical anchorage length refers to the limit anchorage length of the rod of anchorage structure in certain soil and rock. If the rod length exceeds this length,the bearing capacity will not obviously increase,but if the rod length doesn't reach this length,the bearing capacity can be further improved. In recent ten years,the relevant problems of critical anchorage length are researched in China,and many results have been obtained. The typical research results have reviewed and analyzed. It is emphasized that it is still short of systemic study,and this problem has not been solved and is still under discussion. The critical rod anchorage length is a common phenomenon. This problem needs further study on the current design methods based on the average shear stress theory,and will result in the ultimate change of traditional anchorage structure design concepts. For the discovery of the critical anchorage length phenomenon,it is about 10 years earlier in foreign countries than in China. However,as the term of critical anchorage length with distinct concept,it should be focused on.