1) excavation and reinforcement scheme
开挖加固方案
2) excavation scheme
开挖方案
1.
On excavation scheme of foundation pit of roadside high-rise building;
浅谈路边高层住宅基坑的开挖方案
2.
Effects of excavation scheme on adjoining stability of rocks surrounding tunnels;
开挖方案对洞群围岩稳定性的影响研究
3.
Relying on one freeway tunnel reconstruction and extension projects, this paper studies on reasonable types of reconstruction and extension, superior excavation scheme, dynamic construction mechanics and support parameters optimization.
本文依托某高速公路隧道扩建工程,对其合理的扩建型式及开挖方案、动态施工力学以及支护参数优化等问题进行了研究,主要内容和结论如下:1。
3) reinforcement scheme
加固方案
1.
Finite element analysis of reinforcement scheme of Changsha dam and its safety evaluation;
长沙坝水库大坝加固方案有限元分析及安全评价
2.
Study on the reinforcement scheme of the slant-legged rigid frame arch bridge;
斜腿刚架拱桥加固方案研究
4) reinforcement plan
加固方案
1.
The cause of the diseases has been found out through the present situation diagnosis,as well as with the theoretical analysis of the original design and the examination result,and the thinking of reinforcement design and the control factors,the four reinforcement plans have been studied,and the plan of a 7 cm integrat.
依据加固设计思路和控制因素,对4个加固方案进行分析研究,选定了7 cm整体化层+4 cm沥青铺装层不增加横隔板的加固方案。
2.
Through the utilization fuzzyoptimal theory, the fuzzy optimal models of bridge reinforcement plan with multi-layer and multi-objective are established, thus the relative optimal membership degrees of plans are got.
运用模糊优选理论,建立了桥梁加固方案的多层多目标模糊优选模型,并应用模糊定权的方法来确定目标的权重,得到各个方案的相对优属度,比较各个方案的优属度选择最优加固方案,并通过一个算例证明其可靠性。
5) reinforcing scheme
加固方案
1.
The characteristic of pit,enclosing structure scheme and supporting system,and reinforcing scheme are introduced one by one in the paper.
本文系统地介绍了基坑的特点、围护结构方案及支撑体系设计和加固方案。
2.
According to the present conditions of the Xigang Bridge,we introduce the reinforcing scheme and the construction technique in detail as well as the construction process after analyzing the reasons of the disable bridge.
分析汉十公路丹江段西岗桥存在的病害现状及原因 ,介绍加固方案、施工技术和施工流
6) reinforcing plan
加固方案
1.
Fuzzy decision of one reinforcing plan;
某工程加固方案的模糊决策
2.
Aiming at the main difficulties and risks of bridges and culverts on haven-built railways,combined with the field construction environment,the different line reinforcing plans were choosed and the different construction plans were compared analysis,so the best plan was obtained,which make the line reinforcing plan more scientific and reliable.
针对铁路既有线桥涵改造加固的主要难点及风险,结合现场施工环境,选择了不同的线路加固方案,对不同的施工方案进行了比较分析,从而得出最优方案,使线路加固方案更加科学、可靠。
补充资料:大型岩石基坑开挖
大型岩石基坑开挖
excavation of big foundation pit in rock
dax旧9 yanshi Jikeng kaiwa大型岩石荃坑开挖(exeavation of big foun-dation pit in roek)在岩石地基中开挖面积大和(或)深度大的基坑。大型岩石荃坑开挖,一般包括岩石破碎和石方挖运。随着凿岩机械、爆破器材、爆破技术和挖运机械的发展,施工技术的不断进步,大型岩石基坑开挖施工的机械化程度也越来越高,爆破成型技术更加完善,施工速度不断加快,对周围设施的影响也愈来愈小。岩石破碎常用以下方法破碎岩石形成基坑:人工破碎;机械破碎;坑中爆破、周边用人工或机械修整;光面爆破;近人爆破和静态爆破。 人工破碎松软岩石用镐、撬棍破碎;坚硬岩石用锤击钢钎破碎。人工破碎工效低,劳动强度大。 机械破碎岩石通常采用风镐破碎。 坑中爆破、周边用人工或机械修整为防止基坑周边和坑底震裂,在周边和坑底预留一定宽度或厚度,待坑内岩石爆破以后,再用人工或机械修边清底。坑内岩石常用下述方法爆破:浅孔爆破法(炮眼深度小于sm);深孔爆破法〔炮眼深度大于sm)和微差爆破法‘利用毫秒电雷管顺次起爆)。 光面爆破在爆破的最终开挖面上布置加密的深孔,并在孔内进行减弱装药或部分不装药,以使爆破时沿这些孔的连线破裂而形成平整的光面。光面爆破有四种:(l)密集空孔爆破。密集空孔的孔径一般为34~75mm,孔距为孔径的z一4倍,孔深小于xom。在开挖的轮廓线上布置密集空孔(不装药),靠近空孔布置一排减弱装药的加密炮眼。(2)缓冲爆破。沿开挖轮廓面布置一排加密炮眼,其全部或大部装减弱药包,药包紧贴在朝向自由面的深孔壁上,填充细砂以堵塞孔口,主炮起爆后再起爆缓冲爆破孔。(3)周边爆破。在开挖轮廓面上布置间距较小的炮眼和使用小直径药卷,不用填充物而采用空气间隙装药,其原理与缓冲爆破相同。(4)预裂爆破。在开挖轮廓线上布置密集孔眼,构成预裂孔眼,起爆后在预裂孔的连线上形成1一2c。宽的预裂缝,当主爆孔爆破时,爆破范围以外的岩石就可受到预裂缝的保护。 近人爆破和静态爆破近人爆破是在炮眼中装入特制的高能燃烧剂,利用其燃烧时气体的急骤膨胀而破碎岩石。此法飞石少,飞石距离小,但爆破效率较低。静态爆破是在炮眼中装入特制的膨胀剂,利用其在一定时间内的攀胀力将岩石挤裂。此法无飞石,无冲击波,无音响。近人爆破和静态爆破常在建筑物密集处或重要设施附近使用。 石方挖运可使用正铲、反铲挖掘机或抓斗将破碎的石方挖出装车运走。运距不太远时也可使用铲运机经过通道在坑底直接铲碴外运,此法效率高,成本低。常用的几种挖运石方的方法是:(1)垂直提升法。
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参考词条