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水利工程施工招标评标中对投标报价分值计算的内容相似,但计算的方法不尽完全相同.文章从水利工程投标报价设计计算通用表格出发,提出了自己报价得分计算的基本思路. 相似文献
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申海莲 《中国农村水电及电气化》2014,(1):21-25
摘要:在水利工程设计招标中,需要针对设计的特点制定相应的评标办法,以便更好地选择设计单位并指导投标单位合理报价。本文结合某排水隧洞设计项目的特点,从评标因素选择及量化、投标人资格设定、报价得分计算等方面对评标办法进行了分析总结,为进一步提高招标效果,提出了建议。 相似文献
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通过大量参与山西省水利行业近期河道治理工程的投标工作,根据招标采用的评标基准价计算办法,研究分析了评标基准价与招标控制价的线性关系,以及投标人最高报价、最低报价与招标控制价的关系.从而可以预测所投标段的评标基准价、最高报价、最低报价,为投标报价提供参考,使报价尽量接近评标基准价,以减少商务部分扣分,为整个投标获得高分打下基础,进而帮助投标单位入围。 相似文献
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随着水利水电工程项目的增加及招投标工作的普及,在水利水电工程的开标、评标工作中,各种数据的计算与取舍是一项非常烦琐的工作,为了能在评标工作中快速、准确地计算出投标报价与标底的差额与比值、复合标底、报价得分等各种数据,可通过利用Excel软件中的强大计算功能,实现上述各种计算和取舍工作,使水利水电工程的开标、评标工作从烦琐的造价得分计算工作中摆脱出来,使有关人员能够集中精力对各投标单位的施工能力、施工组织设计、质量保证措施、业绩和信誉等进行更深入的研究和评判,为业主推选出最好的施工队伍. 相似文献
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从招标文件编制上分析了如何导向投标单位进行理性竞争。通过设置最高限价,把投标报价控制在招标人的期望值范围之内;通过把鼓励低价同限制恶性竞争相结合的办法,鼓励良性竞争;在招标文件的导向上,使大多数投标人的投标报价在合理最低价左右浮动。同时,施工组织设计评分与投标报价相结合,量化技术标评分值,使评标专家在评标时的操作性更强,尽可能减少评标过程中的主观打分值。最后,通过量化技术标评分值,对投标报价的评分进行了补充和完善。 相似文献
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根据《中华人民共和国招标投标法》及有关规定,分析标底与评标方法之间的关系;探讨评标标底的作用,指出评标标底只能起到衡量投标报价合理程度的作用,不是决定投标人中标的决定性因素.研究了评标标底的类型、确定方法及这些方法的优缺点,提出现阶段应采用复合标底进行评标,即以招标人编制的标底与投标报价的加权平均值计算得到的评标标底作为复合标底. 相似文献
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在激烈的建筑市场竞争体制下,水电施工企业要想中标必须编制合理报价,不同的评标办法,其编制报价的方法与策略是不相同的,通过对历史投标统计资料的分析,文章提出了一种基于百分制评标办法运用概率分析的报价方法,该方法将量化分析运用于投标决策,为投标报价提供一个科学的,定量的决策依据,运用此方法能确保投标报价不失误,且能得到一个较高的报价评分。 相似文献
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根据冗各电站地下厂房开挖支护的施工顺序,以隐式杆单元模拟锚杆,以壳单元模拟混凝土喷层,采用三维非线性有限元技术,对洞室群的开挖支护动态过程进行了模拟计算。通过三维非线性有限元计算分析得到:洞室群动态开挖过程中围岩应力变形的分布规律,围岩塑性区的发展规律,锚杆受力变化情况。计算结果表明:整个开挖过程中,洞周围岩位移变化规律正常,量值较小,塑性区主要分布在洞室周边,围岩稳定性较好;但在洞室交叉口处围岩的变形较大,出现较大范围的塑性区,在此基础上提出了支护措施优化方案,并对优化方案的效果进行了评价。 相似文献
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The relocation of unionacean mussels is commonly used as a conservation and management tool in large rivers and streams. Relocation has been used to recolonize areas where mussel populations have been eliminated by prior pollution events, to remove mussels from construction zones and to re-establish populations of endangered species. More recently, relocation has been used to protect native freshwater mussels from colonization by the exotic zebra mussel Dreissena polymorpha. We conducted a literature review of mussel relocations and evaluated their relative success as a conservation and management strategy. We found that 43% of all relocations were conducted because of construction projects that were forced to comply with the Endangered Species Act 1973 and that only 16% were monitored for five or more consecutive years. Most (43%) relocation projects were conducted from July to September, presumably a period when reproductive stress is relatively low for most species and the metabolic rate is sufficient for reburrowing in the substrate. The mortality of relocated mussels was unreported in 27% of projects; reported mortality varied widely among projects and species and was difficult to assess. The mean mortality of relocated mussels was 49% based on an average recovery rate of 43%. There is little guidance on the methods for relocation or for monitoring the subsequent long-term status of relocated mussels. Based on this evaluation, research is needed to develop criteria for selecting a suitable relocation site and to establish appropriate methods and guidelines for conducting relocation projects. 相似文献
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In the lower River Murray, Australia, populations of gastropods have declined markedly over the past 40 years. Of the native fauna of about 18 species, only the ancylid Ferrissia petterdi remains common (but in patches), and another five species feature in sporadic local resurgences. Until recently the viviparid Notopala was thought to be extinct. The introduced physid Physa acuta is widespread, but in low numbers. The decline probably is associated with flow regulation, high turbidity and the introduction of common carp. Snail populations have persisted, however, in irrigation pipelines fed from the river, where they periodically cause blockages. This paper reports the discovery of the only known populaion of Notopala hanleyi in a pipeline where the inner wall accumulates microbial and other organic matter, providing high quality food for snails. In the Murray before regulation most of the periphytic biomass was probably microbial, as fluctuating water levels would have maintained littoral communities in a highly productive, early state of succession his postulated that, by stabilizing seasonal water levels, regulation has promoted the production of filamentous green algae, an inferior food source, and so displaced snail populations from the open aquatic environment. 相似文献
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V. K. Konovalov O. V. Yashkin V. V. Ermakov 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2008,42(2):105-109
A system for removal and pneumatic transport of fly ash is examined, in which air pulses act on batches (pistons) of ash formed
in a duct. Studies are made of the effect of several physical parameters on the force required to displace a piston of ash
and these serve as a basis for choosing a system for removal and pneumatic transport of ash simultaneously from several hoppers
of an electric precipitator. This makes it possible to separate the ash particles according to size without introducing additional
components. Formulas are given for calculating the structural and dynamic parameters of this system and measurements of indirect
dynamic parameters are used to calculate the input-output characteristics of the system. In order to optimize the system,
configurations for summing several ducts into a single transport duct for pneumatic ash transport are proposed. Some variants
of dry ash utilization and the advantages of producing of size-separated particles are considered.
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Translated from élektricheskie Stantsii, No. 2, pp. 26–30 (2008). 相似文献
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Peter B. Bayley 《河流研究与利用》1991,6(2):75-86
The ‘flood pulse advantage’ is the amount by which fish yield per unit mean water area is increased by a natural, predictable flood pulse. Evidence for this increase is presented from tropical and temperate fisheries. It is argued that increasing multispecies fish yield by restoring the natural hydrological regime is consistent with increasing production of other trophic levels and with restoration from ecological and aesthetic viewpoints. When applied to a river-floodplain system, this restoration would provide a large, self-sustaining potential for recreation, commercial exploitation, and flood control. An interim ‘natural flood pulse’ restoration approach is proposed for systems modified for navigation. This approach approximates the natural hydrological regime in a river reach and is intended as a first step in the long process of restoring the watershed. 相似文献
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简述天湖水电站投运以来各种故障的表现形式,分析其原因,提出了相应的处理方法及措施,并对合理利用国内外设备提出建议。 相似文献