基于价值工程理念的斜井开挖方案分析  

Analysis of Inclined Well Excavation Scheme Based on Value Engineering Concept

作　　者：付虎 李守宇 耿赟 寇俊伟 马绒康 张庆文 Fu Hu;Li Shouyu;Geng Yun;Kou Junwei;Ma Rongkang;Zhang Qingwen(School of Civil Engineering,Southwest Forestry University,Kunming 650224,China)

机构地区：[1]西南林业大学土木工程学院,昆明650224

出　　处：《科技通报》2024年第4期71-76,83,共7页Bulletin of Science and Technology

基　　金：云南省科技厅重点研发计划(社会发展)(2018BC008);中国中铁科技研究开发计划课题(2020-重大专项-04);滇中引水楚雄段(XLKK-333-2022)。

摘　　要：在工程项目中因追求技术手段而忽略其施工成本,易形成传统的“点头工程”,这不利于工程造价。在方案选择时引入价值工程基本原理,既能实现项目功能,又能科学合理地进行成本控制。在地质条件差、地下水位高和开挖坡度大、断面小和距离长等特点的斜井快速开挖工程中,不仅施工机械化受限,而且坡度倾角和超欠挖难以控制。本文通过绘制功能系统层次分析图,运用层次分析法计算出各层次功能权重系数,再根据功能系数和成本系数计算对应价值系数。结果表明:价值系数最大的方案是二台阶开挖法,其次是全断面开挖法,然后进一步对围岩类别进行优化,提出针对本斜井特点的开挖组合方案:Ⅲ类围岩斜井段采用全断面开挖法开挖,Ⅳ∼Ⅴ类围岩斜井段采用二台阶开挖法开挖。优化后的方案在经济效益和社会效益方面取得显著成效,比原设计的三台阶开挖方案节省成本47.41万元,约7.43%;工期缩短32 d,约8.37%。In engineering projects,due to the pursuit of technical means and ignoring its construction costs,it is easy to form a traditional"nodding project",which is not conducive to the cost of the project.The introduction of basic principles of value engineering in the selection of solutions can not only realize project functions,but also carry out cost control scientifically and reasonably.In the rapid excavation of inclined wells with poor geological conditions,high groundwater table,large excavation slope,small section and long distance,not only the mechanization of construction is limited,but also the slope inclination angle and over-under-excavation are difficult to control.By drawing the hierarchical analysis diagram of the functional system,the analytic hierarchy method is used to calculate the func-tional weight coefficient of each level,and then the corresponding value coefficient is calculated according to the functional coefficient and the cost coefficient.The results show that the scheme with the largest value coefficient is the two-step excavation method,followed by the full-section excavation method,and then the surrounding rock category is further optimized,and an excavation combination scheme according to the characteristics of the inclined well is proposed:the class III.surrounding rock inclined well section is excavated by the full-section excavation method,and the IV.class V surrounding rock inclined well section is excavated by the two-step excavation method.The opti-mized scheme has achieved remarkable results in economic and social benefits,saving 474100 yuan,or about 7.43%,compared with the original three-step excavation scheme;The construction period was shortened by 32 days,about 8.37%.

关 键 词：价值工程 斜井开挖 层次分析法 判断矩阵 

分 类 号：TU-9[建筑科学]