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- Controlling methods for cracking in mass concrete lining of an underground engineering 某地下工程大体积混凝土衬砌裂缝控制措施研究
- mass concrete lining 大体积混凝土衬砌
- The influences of blasting vibration on the stability of surrounding rocks mass and concrete lining of existed adjacent chambers, or excavating tunnel and the grouted rockbolts are studied and analyzed in the thesis. 本文主要研究爆破振动对邻近地下洞室和本洞围岩稳定性、混凝土衬砌及砂浆锚杆的影响。
- The application of FEM to the temperature and creep of the mass concrete structure is studied in this thesis. 本文就有限单元法在大体积混凝土结构温度及徐变方面的研究与应用做了较系统的研究,主要完成了如下工作:
- Various types of companies existing concrete lining of steel formwork car, rail, trolley concrete delivery tanker. 公司现有各类型混凝土衬砌钢模板台车,有轨,无轨混凝土输送罐车。
- An anticorrosion method of using modified water glass concrete lining of furan resin for saturators is introduced. 介绍了一种对饱和器采用呋喃改性水玻璃混凝土衬里的防腐蚀方法。
- We have used needle beam telescoping steel form in the Mao-Gong reservoir sediment tunnel in the concrete lining. 在庙宫水库排沙洞的衬砌施工中使用了针梁式混凝土衬砌钢模台车。
- The application of inter borehole acoustic wave method to probing deep cracks in mass concrete can effectively solve the above mentioned problems. 而应用声波跨孔法进行大体积混凝土结构的深裂缝检测可有效地解决上述问题。
- The paper presents a series of anti-cracking measures taken during the construction of mass concrete in hot weathers to prevent concrete cracking. 文章阐述了热天大体积混凝土施工过程中,为防止混凝土裂缝的产生,采取了一系列相应的防裂措施,达到了预期的效果。
- The temperature specific property and change regularity of the mass concrete in laminal pouring are mirrored exactly by the monitoring result. 监测结果真实地反映了锚碇建设中薄层浇注大体积混凝土的温度特性和变化规律。
- The practice shows that it is effective to decrease the cracking of the concrete lining slab through the active adoption of those measures. 实践证明:通过采取积极的预防及控制措施,对减少混凝土衬砌板裂缝的产生是非常有效的。
- For the laminated pouring of mass concrete, the best time slot is close to the time that mass concrete reaches the tiptop temperature. 对分层浇筑混凝土而言,其最佳分层浇筑间隔时间一般在先浇筑层混凝土达到最高温升的时间附近。
- It is difficult to analyze combined work of underground penstock due to the gap among steel lining, concrete lining and rock. 摘要埋藏式压力钢管设计中,钢衬、混凝土衬圈和围岩之间普遍存在着不连续的缝隙,致使设计计算时难以进行联合受力分析。
- First, this paper uses finite element to analyze temperature field of mass concrete and derive corresponding calculative formula. 首先,应用有限元理论对大体积混凝土的温度场进行了分析,推导出了相应的计算公式。
- For concrete lining construction of long inclined shaft with sleep obliquity and big diameter, the construction technology is complex and difficult. 摘要陡倾角大直径长斜井混凝土衬砌施工技术复杂,施工难度特别大。
- This paper presents the construction methods of mass concrete for main pier abutment of the Fourth Bridge on Xiangjiang in Xiangtan. 本文对湘潭湘江四大桥主墩承台大体积混凝土施工中的施工方法进行阐述,并对施工过程中应该注意的质量控制方法进行分析和总结。
- Up to present, cooling methods, such as pipe cooling and precooling, are used to control the maximum temperatures in mass concrete to prevent cracking. 摘要提出一种新的混凝土结构温控防裂方法,利用水管加热、表面热水或表面热风,以加热下部混凝土,减少上下部温差,防止混凝土裂缝。
- Key words: reinforced concrete、 concrete、 high performance concrete、 cement concrete、 pozzolanic effect、 mass concrete. 关键词:钢筋混凝土、混凝土、性能混凝土、高强混凝土、泥混凝土、生骨料混凝土、体积混凝土。
- Because two tailrace tunnels of Laxiwa Hydropower Station are big in its diameter,the concrete lining adopted the way of "first bottom and then side and top arch". 拉西瓦水电站两条大洞径的尾水洞,采用先底拱、后边顶拱的混凝土浇筑方式。
- In the structure design composite lining is adopted, including front pre-grouting, grid steel frame, primary shotcrete-bolting support and reinforcing concrete lining. 在超前地质预报工作的基础上,结构设计采用超前注浆堵水、初期格栅钢架喷砼网支护、二次现浇钢筋砼衬砌的复合式衬砌方案。