As one of new composite structures in the field of civil engineering , concrete - filled rectangular steel tubular ( cfrt ) structure has high capacity , large energy absorption capacity , and high ductility , also it has regular shape which is easy to connect between columns and beams , convenient fire - control measure , and short construction time 方钢管混凝土结构作为一种新型组合结构，具有承载力高、耗能能力强、延性好等特点，且外形规则便于梁柱连接，防火措施简单，施工周期短，因此，在中高层住宅建筑中有较广泛的应用前景。
We would also adopt a flexible approach in devising the development model . factors such as construction scale , specific site situation , development potential , total unit numbers , housing design , construction time and costs etc . would all be considered . besides , we can use our standard housing design or the new non - standard design method , or even a mixture of both 我们会采取灵活富弹性的手法，从地盘的规模、实况、发展价值、单位数目、楼宇设计、建筑时间和成本等各项因素，去厘订最适合的发展模式，既可沿用标准设计楼宇、亦可采用非标准设计或揉合二者同时采用。
The paper analyzed synthetically the environmental impact that is produced in construction time of under - ground no . one of shenyang , studied the generant rule and quantity of pollutants such as noise , vibration , waste water , waste gas and solid offal and etc . , proposed countermeasures to alleviate and control environmental impact 摘要通过对沈阳地铁一号钱施工期产生的环境影响综合分析，研究该项目在建设中产生的噪声、振动、废水、废气及固体废弃物等污染物产生的规律和发生量，并提出缓解和控制环境影响的措施。
