高海拔陡深斜井自密实混凝土及衬砌快速施工技术的研究
发布时间：2018-11-19 11:07
【摘要】：斜井，是指从地面斜向通达地下巷道的井筒[1]。一般将小于30°倾角的斜井称缓倾角斜井，大于或等于45°倾角的斜井称陡倾角斜井[1]。本文中所指的高海拔陡深斜井，即是指海拔高程2635.017m～3223.000m，倾角60°，总长1266.743m，总高差587.983m，位于新疆喀什地区阿克陶县境内的布伦口—公格尔水电站引水隧洞高压引水管道段。而本文重点研究的工程部位实为其中的采用自密实混凝土作为衬砌材料进行浇筑施工的上斜井段。上斜井段中心线高程2951.500m～3223.000m，长327.598m，高差271.500m。 布仑口—公格尔水电站引水隧洞陡深斜井高压管道段衬砌采用内径3m，厚16mm～48mm的压力钢管作为高压引水管道内衬，，钢管外与开挖后的围岩洞壁之间浇筑素混凝土[2]。浇筑的素混凝土原设计采用物理性能指标为C20F300W6的二级配高性能混凝土，但在上平洞段的浇筑工作结束后，基于之前浇筑工作中所遇到的困难和问题，考虑到上斜井的长度更长，浇筑施工的难度会更大，施工的质量更加不易保证以及施工速度会更加缓慢等的问题，经研究分析，最终决定采用一级配自密实混凝土来取代二级配高性能混凝土完成上斜井段衬砌的混凝土浇筑工作。 布仑口—公格尔水电站陡倾角、长斜井采用不设置任何缓冲设施的溜管输送，并突破常规，将分段长度加大到40m，112m甚至160m；通过合理地布置混凝土泵车和溜管，使连续浇筑成为可能，从而使斜井的浇筑能力达到了300m3/d～400m3/d，加快了施工速度、简化了施工工序、降低了施工难度、提高了施工效率。 通过定性及定量地分析比较陡深斜井自密实混凝土衬砌与常规混凝土衬砌施工时的施工速度，计算两者的材料成本单价、人工成本单价及综合单价，突显了自密实混凝土的优越性，从而证明自密实混凝土在陡深斜井衬砌工程上的应用具有重要意义。
[Abstract]:Inclined shaft refers to the shaft from the ground to the underground roadway [1]. The inclined well with less than 30 掳inclination is generally called the slowly inclined well, and the inclined well with 45 掳dip angle or equal to 45 掳angle is called the steep dip inclined well [1]. In this paper, the steep and deep inclined well at high altitude refers to 2635.017mt, 3223.000m, the inclination is 60 掳, the total length is 1266.743m, the total height difference is 587.983 m, the slope angle is 60 掳, the total length is 1266.743m, the total height difference is 587.983m. Located in Aktao County, Kashi area, Xinjiang, the high pressure diversion pipeline section of the diversion tunnel of Brunkow-Gongge Hydropower Station. The engineering site studied in this paper is the upper inclined well section which uses self-compacting concrete as lining material. The height of the center line of the upper inclined well is 2951.500 mg ~ (3223.000 m), the length is 327.598 m, and the height difference is 271.500 m. The lining of the high pressure pipeline section of the steep and deep inclined well of the water diversion tunnel of Boulenkou Gongge Hydropower Station adopts the inner diameter of 3 m, the pressure steel pipe of thick 16mm~48mm is used as the inner lining of the high pressure water diversion pipeline, and the plain concrete is poured between the outside of the pipe and the wall of the surrounding rock after excavation [2]. The primary design of plain concrete was designed with secondary high performance concrete with physical performance index of C20F300W6. However, after the pouring work of the section of Shangping Cave is finished, considering the difficulties and problems encountered in the previous pouring work, considering the length of the upper inclined shaft is longer, The problems of pouring construction will be more difficult, the quality of construction will be more difficult to guarantee and the construction speed will be slower. Finally, it is decided to replace the secondary high performance concrete with the first grade self-compacting concrete to finish the lining of the upper inclined shaft. The long inclined shaft is transported by pipe without any buffering facilities, and the length of section is increased to 40m ~ 112m or even 160m by breaking through the normal rule in the steep inclination angle of Brunkou-Gongger Hydropower Station. By reasonably arranging concrete pump cars and pipes, it is possible to make continuous pouring possible, so that the pouring capacity of inclined wells reaches 300 m3 / d, 400m3 / d, which speeds up the construction speed, simplifies the construction process, and reduces the difficulty of construction. The construction efficiency is improved. By qualitatively and quantitatively analyzing and comparing the construction speed of self-compacting concrete lining and conventional concrete lining in steep and deep inclined wells, the material cost unit price, labor cost unit price and comprehensive unit price are calculated. The superiority of self-compacting concrete is highlighted, and the application of self-compacting concrete in steep and deep inclined shaft lining engineering is proved to be of great significance.
【学位授予单位】：新疆农业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV431;TV554.14
本文编号：2342119
[Abstract]:Inclined shaft refers to the shaft from the ground to the underground roadway [1]. The inclined well with less than 30 掳inclination is generally called the slowly inclined well, and the inclined well with 45 掳dip angle or equal to 45 掳angle is called the steep dip inclined well [1]. In this paper, the steep and deep inclined well at high altitude refers to 2635.017mt, 3223.000m, the inclination is 60 掳, the total length is 1266.743m, the total height difference is 587.983 m, the slope angle is 60 掳, the total length is 1266.743m, the total height difference is 587.983m. Located in Aktao County, Kashi area, Xinjiang, the high pressure diversion pipeline section of the diversion tunnel of Brunkow-Gongge Hydropower Station. The engineering site studied in this paper is the upper inclined well section which uses self-compacting concrete as lining material. The height of the center line of the upper inclined well is 2951.500 mg ~ (3223.000 m), the length is 327.598 m, and the height difference is 271.500 m. The lining of the high pressure pipeline section of the steep and deep inclined well of the water diversion tunnel of Boulenkou Gongge Hydropower Station adopts the inner diameter of 3 m, the pressure steel pipe of thick 16mm~48mm is used as the inner lining of the high pressure water diversion pipeline, and the plain concrete is poured between the outside of the pipe and the wall of the surrounding rock after excavation [2]. The primary design of plain concrete was designed with secondary high performance concrete with physical performance index of C20F300W6. However, after the pouring work of the section of Shangping Cave is finished, considering the difficulties and problems encountered in the previous pouring work, considering the length of the upper inclined shaft is longer, The problems of pouring construction will be more difficult, the quality of construction will be more difficult to guarantee and the construction speed will be slower. Finally, it is decided to replace the secondary high performance concrete with the first grade self-compacting concrete to finish the lining of the upper inclined shaft. The long inclined shaft is transported by pipe without any buffering facilities, and the length of section is increased to 40m ~ 112m or even 160m by breaking through the normal rule in the steep inclination angle of Brunkou-Gongger Hydropower Station. By reasonably arranging concrete pump cars and pipes, it is possible to make continuous pouring possible, so that the pouring capacity of inclined wells reaches 300 m3 / d, 400m3 / d, which speeds up the construction speed, simplifies the construction process, and reduces the difficulty of construction. The construction efficiency is improved. By qualitatively and quantitatively analyzing and comparing the construction speed of self-compacting concrete lining and conventional concrete lining in steep and deep inclined wells, the material cost unit price, labor cost unit price and comprehensive unit price are calculated. The superiority of self-compacting concrete is highlighted, and the application of self-compacting concrete in steep and deep inclined shaft lining engineering is proved to be of great significance.
【学位授予单位】：新疆农业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV431;TV554.14
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