【摘要】 基于环境与土工相互制约、相互调整的系统平衡关系,从大环境问题和小环境的角度,探讨了青藏高原多年冻土地区的环境土工问题。首先,提出了冻土地区土工设计原则并指出了土工结构稳定的核心是热稳定性。从大环境的角度,探讨了包括大气环境演变、地温分带以及景观生态所确定的土工设计适用原则和条件;其次,土工结构虽然是一个冷结构,但无论是填筑还是开挖,都将破坏天然地层的原始热平衡状态,由此引发的环境变化也是必然的。因此从小环境的角度,探讨了自然营力引起的环境变化以及土工建设可能引发的环境破坏和工程危害;第三,在大环境不可控或是通过更全面的努力来减小大环境向不利方向发展的前提下,探讨了在土工建设如何保护环境的原则和方法。更多还原

【Abstract】 Based on the inter-constraint and inter-adjustment system balance between environment and earthwork,the environment earthwork problems in permafrost region of Qinghai-Tibet plateau is discussed with a view of macro and micro environment. Firstly,the atmosphere environment development,ground temperature zone,the suitable principle and condition of earthwork design decided by landscape ecology are discussed on macro environment aspect. Secondly,the environment changes by the constructive force of nature and the probable environment destruction and engineering hazard caused by earthwork construction are discussed on micro environment aspect. Thirdly,on the condition that the macro environment can not be controlled or can only be directed to a less worse situation by more comprehensive efforts,the principle and method are discussed for protecting environment in earthwork construction.更多还原