CAJ | 학술논문

多个工程实例表明:岩土体蠕变易引起锚固工程支护结构加固频繁、锚索重新张拉等工程病害,严重者导致锚固力失效,锚固工程失稳,如若处理不当,将直接危及施工人员的生命财产安全;本文以济南市某深基坑工程案例为依托,将岩土体由经典的广义Kelvin体代替,推导了其本构方程、蠕变方程、松弛方程,从理论上分析了锚索蠕变变形对预应力损失的贡献大小;并结合现场测试数据对比可知:该模型能够较好的反映蠕变变形引起的损失趋势,由数据软件拟合公式可知,理论计算结果与测试数据偏差不大,论证了上述分析的可靠性,为今后锚固工程的设计、施工提供了理论依据和技术支持.
다개공정실례표명:암토체연변역인기묘고공정지호결구가고빈번、묘색중신장랍등공정병해,엄중자도치묘고력실효,묘고공정실은,여약처리불당,장직접위급시공인원적생명재산안전;본문이제남시모심기갱공정안례위의탁,장암토체유경전적엄의Kelvin체대체,추도료기본구방정、연변방정、송이방정,종이론상분석료묘색연변변형대예응력손실적공헌대소;병결합현장측시수거대비가지:해모형능구교호적반영연변변형인기적손실추세,유수거연건의합공식가지,이론계산결과여측시수거편차불대,론증료상술분석적가고성,위금후묘고공정적설계、시공제공료이론의거화기술지지.
Through collating and analyzing the existing data of engineering examples,rock creep can lead the anchor-age support re-tensioned and repaired frequently,which could further result in the failure of the anchoring force and the instability of the anchor project;If it should not be handled properly,the life and property safety of construction workers were endangered;One deep pit of Jinan City was taken as an example,the creep calculation model was replaced as gener-al Kelvin,the corresponding constitutive equations,creep equation,relaxation equation were deduced;The theoretical cal-culation of the anchor prestressing loss which result of creep deformation was analyzed;Comparison of theoretical calcula-tion result and field test data shows that:the creep calculation model can better reflect the cable prestressing loss trends;the fitting formula demonstrated the reliability of the above analysis;it provided a theoretical basic and technical support for the design and construction of similar anchor project in the future.