公路工程投资估算新标准的应用分析

通过对公路工程投资估算新标准的分析和研究,找出新旧标准的差异,提出在新标准下编制公路工程基本建设项目投资估算的资料收集和工程量统计标准,并结合实际案例,就当前应用新标准遇到的问题提出应对措施,为同业编制合理的公路工程投资估算提供借鉴.     

政策法规

交通部：发布“关于公布公路工程基本建设项目投资估算编制办法和公路工程估算指标的公告”2011年11月9日,交通部发布“关于公布公路工程基本建设项目投资估算编制办法和公路工程估算指标的公告”（中华人民共和国交通运输部公告2011年第82号）,     

浅析公路概预算组成结构与计算方式的变化

经修订的《公路工程建设项目概算预算编制办法》(JTG 3830-2018)自2019年5月1日正式实施,采用新旧对比、理论阐述、事实举证、归纳总结等论证方法,结合2007版编办、最新政策法规、我国公路建设实际,重点分析2018版编办对原编办在概预算组成结构与计算方式方面的修订内容、修订原因及修订后的现实意义。     

浅谈公路工程造价的合理编制

从合理运用估算指标、编制工程投资估算,合理使用定额进行工程概预算编制,学习新技术、积累实验几方面对如何进行公路工程造价的合理编制进行了探讨,以供编制工程造价的技术人员参考。     

公路工程新旧概算预算编制办法对比分析

为适应新时代公路工程发展需要,在“07旧编办”的基础上修订完善并形成了“18新编办”,使造价依据更加符合实际,项目造价编制更加合理。本文从编制依据、文件构成、概(预)算项目、费用组成、各项费用标准和计算方法等方面对新旧编办进行了详细的对比,旨在加深公路造价人员对新编办的理解、掌握和运用。     

“市政工程投资估算指标”编制研究

建设项目的投资估算是可行性研究报告的重要组成部分和项目决策的基本依据之一,建设部1996年发布的《全国市政工程投资估算指标》是编制投资估算的主要依据,通过主持编制《全国市政工程投资估算指标》的工作,介绍了在社会主义市场经济条件下编制该指标的新思路、指标体现的特点以及为达到编制目标应该采取的编制方法。     

公路隧道工程造价指标分析与探讨

针对公路隧道工程造价编制中出现的概预算超投资估算问题,通过选取典型案例,采用相同的工料机单价及费率标准编制估算和预算文件,对比分析估算指标与预算水平的差异。研究结果表明:各级围岩条件下的隧道工程造价相差很大;Ⅲ级围岩的估算指标较预算水平高出较多,但Ⅳ、Ⅴ级围岩的预算水平均较估算指标高出较多。     

资讯动态

【政策法规】交通部:公布《公路桥涵施工技术规范》(JTG/T F50-2011)交通部6月7日公布《公路桥涵施工技术规范》(JTG/T F50-2011),作为公路工程行业推荐性标准,自2011年8月1日起施行,原《公路桥涵施工技术规范》(JTJ 041-2000)同时废止。     

《市政工程投资估算指标》介绍(1)

为了合理确定和控制市政工程投资,满足建设项目编制项目建议书和可行性研究报告投资估算的需要,提高建设工程投资效果,建设部制定了《市政工程投资估算指标》,包括《第1册道路工程》(HGZ 47—101—2007)、《第2册桥梁工程》(HGZ 47—102—2007)、《第3册给水工程》(HGZ 47—103—2007)、《第4册排水工程》(HGZ 47—104—2007)、《第5册防洪堤防工程》(HGZ 47-105—2007)、《第6册隧道工程》(HGZ47—106—2007)、《第7册燃气工程》(HGZ 47—107—2007)、《第8册集中供热热力网工程》(HGZ 47—108—2007)、《第9册路灯工程》(HGZ 47—109—2007)。1996年发布的《全国市政工程投资估算指标》同时废     

资讯动态

【政策法规】交通部:公布《公路桥梁技术状况评定标准》(JTG/T H21-2011)交通部7月19日公布《公路桥梁技术状况评定标准》(JTG/T H21-2011),作为公路工程行业推荐性标准,自2011年9月1日起施行。该标准的管理权和解释权归交通运输部,日常解释和管理工作由主编单位交通运输部公路科学研究院负责。住建部:批准《城市道路工程设计技术措施》及《外墙内保温建筑构造》等14项国家建筑标准设计7月21日,中华人民共和国住房和城乡建设部下发(建质〔2011〕110号)文,批准由中国建筑标准设计研究院等单位编制的     

新旧“测试规程”压实度试验方法对比研究

为保证路基施工质量,必须对压实度进行检测。本文对JTG 3450-2019和JTG E60-2008新旧两个版本《公路路基路面现场测试规程》中常用的测试压实度试验方法挖坑灌砂法和沉降差法进行对比分析,提出新规程中的亮点和有待进一步研究完善的地方,有助于更好地指导现场压实度检测。     

Investigation into capital costs of HVAC systems

The initial capital outlay is one of the largest expenses of any HVAC system. Estimating these costs accurately is crucial to any HVAC economic analysis. In this article, initial cost models are investigated.A literature study reveals different methods for estimating initial costs. None of these are suitable for use during the conceptual design stage. They are either too simplified or require too detailed inputs. The use of “Pareto's Principle” to develop a suitable model is investigated in this paper.“Pareto's Principle” can be formulated to state that 20% of the equipment makes up 80% of the cost. This principle is tested by analysing some tender estimates. Although it appears to hold true, it is also evident that items like piping and ducting contribute significantly to installation costs. Accurate estimates can thus only be obtained by pricing each sub-system separately.Models are proposed for each subsystem of a typical HVAC system. All the proposed models are suitable for integration with QUICKcontrol and are applicable to a wide range of different HVAC systems.Estimating the costs of both the major capital equipment as well as the smaller sub-systems, is relatively simple. Air and water distribution systems are more problematic due to the number of variables. Without a fairly detailed design and costing model, no accurate cost predictions can be made.     

The accuracy of pre‐tender building cost estimates in Australia

A pre‐tender building cost estimate is an important piece of information when making decisions at the project planning and design stage. The important project characteristics influencing the accuracy of pre‐tender building cost estimates are examined and practical improvement for increasing the accuracy of estimates are considered. A quantitative approach is used to address the research problem. Analysis of data from 56 projects and from a postal questionnaire survey of 102 quantity surveying firms suggests that the accuracy of pre‐tender building cost estimates varies according to project size and principal structural material. When eight identified project characteristics are controlled in a multiple regression analysis, the accuracy of estimates is influenced by project size. The estimates of smaller projects are more biased than the estimates of larger projects. It was discovered that pre‐tender building costs are more often overestimated than are underestimated. Overestimated forecasts are incorrect by a larger amount than underestimated forecasts. Data analysis also revealed that the accuracy of pre‐tender building cost estimates has not improved over time. The majority of the respondents are somewhat dissatisfied with the accuracy of estimates in the industry. Probability estimation and simulation of past estimates, reducing quantity surveying and cost engineering skill turnover, incorporating market sentiments into estimates, early involvement of the quantity surveyor at the brief stage, and proper documentation of experience gained in the estimation of projects should help firms increase the accuracy of estimates for new projects.     

新旧《公路水泥混凝土路面设计规范》对比分析

新版JTG D40—2011《公路水泥混凝土路面设计规范》,从设计标准、设计方法到设计参数,相对于旧规范均进行了改进和完善,提高了规范的系统性、先进性和适用性。分析归纳了新规范的主要修订内容,供设计人员参考。     

Planning level tunnel cost estimation based on statistical analysis of historical data

Estimating the construction cost of a tunnel with certain diameter and length during the planning stage of a project is essential and a “must do” to justify the project, but it is a very difficult task. Numerous variables influence the cost of tunnel construction and limited information is available at early stages of design when the possible use of tunnels is being studied. Therefore, there is limited number of models at engineers’ disposal for development of a proper cost estimate in tunneling projects. The focus of this study was to offer a model for estimation of the construction cost of tunnels for various applications in the preliminary stage of a project. The work is based on study of nearly 270 projects and statistical analysis of the recoded construction costs, tunnel size, ground conditions, and tunnel applications. Several cost estimation models are introduced for various tunnel types including waste water, water, and transportation tunnels in soft ground and rock. The model uses commonly available cost indices (CCI and BCI) to adjust the estimated costs for the time and location of the project. The proposed cost models presented in this study can included in a simple program to help users make more accurate and quick cost estimates for their future projects. The models do not deal with construction risk which is an essential part of the study of various methods and should be done through developing a risk registry with related cost of each case before final selection, design, and cost estimation of any tunneling project.     

Die Werratalbrücke Einhausen – neue Wege beim Bau einer Autobahn‐Verbundbrücke mit getrennten Überbauten

The Highway Bridge crossing the Werra Valley at Einhausen – new developments for the construction of a composite bridge with two separate superstructures Within the frame of the so called infrastructure projects “German Unification No. 16” the construction of the new highway A 71 in its section between the city of Meiningen and the border between Thuringia and Bavaria was planned and executed during the recent years. The most important and longest engineering project herein has been the new highway bridge crossing the Werra valley near the village of Einhausen being designed as advanced composite structure. With many new developments regarding fabrication, erection and protection against corrosion of the steel structure this bridge is marking a new milestone in modern bridge technology.     

水泥混凝土路面板厚设计方法的探讨

结合工程设计实例,对现行的CJJ37—1990《城市道路设计规范》和JTGD40—2002《公路水泥混凝土路面设计规范》中有关水泥混凝土路面板厚的设计方法进行分析比较。建议在《城市道路设计规范》修订前,应参照《公路水泥混凝土路面设计规范》来进行水泥混凝土路面设计。     

后张预应力混凝土空心板锚下混凝土裂缝原因分析

从工程实例出发,分析了后张预应力混凝土梁锚下混凝土裂缝产生的原因和处理方法。并对“公路钢筋混凝土及预应力混凝土桥涵设计规范JTGD62-2004”中有关“局部承压”计算公式进行了探索和讨论。     

Excel在隧道监控量测数据分析中的应用

结合JTG F80/1-2004公路工程质量检验评定标准有关规定,介绍了利用Excel绘制收敛—时间曲线的步骤,利用Excel对收敛观测数据进行了回归分析,并阐述了量测成果的应用,以期使监控量测数据分析更准确、快捷、及时、方便。     

基于BP神经网络的工程造价快速估算模型

快速、准确地进行工程造价估算对控制工程成本具有重要的现实意义。根据神经网络原理和对工程特征的分析,确定了6个工程特征类目作为神经网络的输入向量,提出了基于BP神经网络的工程造价快速估算模型,并选取已建住宅工程为估价实例。经验算,其精度可以满足实际工程投资估算和设计概算的需要。因此,用BP神经网络快速估算工程造价是行之有效的。