自牵拉行走式隧道掘进机螺旋与土体间摩阻矩的试验研究
发布时间：2018-10-30 19:52
【摘要】：目前,地下工程的修建将大量遇到在土体建筑物基础或地下建筑物或构筑物之间隧道穿行施工的问题。如今应用广泛的非开挖施工技术,诸如盾构法和顶管法在长距离和灵活转弯穿行技术上难以满足地下空间的施工要求,使得城市地下通道类建设和地下空间开发受到极大限制。针对以上盾构法和顶管法在施工方面的不足,促使了一种土中自牵拉行走式隧道掘进机的诞生。文中介绍了与现有用途相同但行进原理不同的盾构法、顶管法、土中增阻式自行走隧道掘进机等施工技术的应用和研究现状以及各自的顶进力计算理论,还分析介绍了与现有原理相似但用途不同的螺旋锚的工作机理及其安装扭矩的试验研究,对螺旋传动原理及螺旋桨的工作机理也进行了分析。本文的主要研究内容是对掘进机在行进过程中螺旋与土体间摩阻矩的变化进行研究分析,文中通过对螺旋结构的简化处理,推导出了牵拉螺旋摩阻矩的计算公式。经过对现场试验结果与理论值的比较分析以及对试验数据的分析,主要得出以下结论:(1)保证两个牵拉螺旋的同步异向旋转是实现掘进机自行走的关键;(2)对于该试验场地的土体来说,有轴螺旋可以提供更大的牵拉力;(3)在研究范围内,随着螺旋旋入土体长度的增大,螺旋与土体间的摩阻矩也在不断增大;(4)掘进机在行进的过程中,左右两个牵拉螺旋扭矩的变化趋势基本一致;(5)土体的挤压密实效应对螺旋与土体间的摩阻矩有增大效果;(6)牵拉螺旋扭矩的试验值与理论计算值基本吻合;(7)理论分析和试验的结果表明螺旋传动原理在地下隧道施工中的牵拉自身主动前行具有可行性。
[Abstract]:At present, the construction of underground engineering will encounter a lot of problems of tunnel construction between soil building foundation or underground building or structure. Nowadays, the widely used non-excavation construction technology, such as shield method and pipe-jacking method, is difficult to meet the construction requirements of underground space in long distance and flexible turning, which greatly restricts the construction of urban underground passage and underground space development. In view of the shortcomings of the above shield method and pipe jacking method in construction, a kind of self-drawing and walking tunnel tunneling machine in soil was born. This paper introduces the application and research status of shield method, pipe-jacking method and self-propelled tunneling machine with increasing resistance in soil, which have the same use but different moving principle as well as their respective jacking force calculation theories. The working mechanism and installation torque of helical anchors which are similar to the existing principle but different in use are also analyzed. The principle of helical transmission and the working mechanism of propeller are also analyzed. The main research content of this paper is to study and analyze the change of friction moment between screw and soil in the course of traveling of roadheader. Through the simplified treatment of spiral structure, the calculation formula of drag helical friction moment is deduced. The main conclusions are as follows: (1) the key to realize the self-running of the roadheader is to ensure the synchronous and isotropic rotation of the two retraction helices through the comparison and analysis of the field test results and the theoretical values as well as the experimental data. (2) for the soil of the test site, the axial helix can provide greater traction force, (3) in the study area, the friction moment between the helix and the soil increases with the increase of the length of the spiral into the soil. (4) in the process of roadheader, the variation trend of the torque of the left and right pulling helix is basically the same; (5) the compaction effect of soil mass has the effect of increasing the friction moment between the screw and soil. (6) the experimental value of the traction helical torque is basically in agreement with the theoretical calculation value; (7) the theoretical analysis and test results show that the principle of helical transmission is feasible in the construction of underground tunnel.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.31;U456
，
本文编号：2301003
[Abstract]:At present, the construction of underground engineering will encounter a lot of problems of tunnel construction between soil building foundation or underground building or structure. Nowadays, the widely used non-excavation construction technology, such as shield method and pipe-jacking method, is difficult to meet the construction requirements of underground space in long distance and flexible turning, which greatly restricts the construction of urban underground passage and underground space development. In view of the shortcomings of the above shield method and pipe jacking method in construction, a kind of self-drawing and walking tunnel tunneling machine in soil was born. This paper introduces the application and research status of shield method, pipe-jacking method and self-propelled tunneling machine with increasing resistance in soil, which have the same use but different moving principle as well as their respective jacking force calculation theories. The working mechanism and installation torque of helical anchors which are similar to the existing principle but different in use are also analyzed. The principle of helical transmission and the working mechanism of propeller are also analyzed. The main research content of this paper is to study and analyze the change of friction moment between screw and soil in the course of traveling of roadheader. Through the simplified treatment of spiral structure, the calculation formula of drag helical friction moment is deduced. The main conclusions are as follows: (1) the key to realize the self-running of the roadheader is to ensure the synchronous and isotropic rotation of the two retraction helices through the comparison and analysis of the field test results and the theoretical values as well as the experimental data. (2) for the soil of the test site, the axial helix can provide greater traction force, (3) in the study area, the friction moment between the helix and the soil increases with the increase of the length of the spiral into the soil. (4) in the process of roadheader, the variation trend of the torque of the left and right pulling helix is basically the same; (5) the compaction effect of soil mass has the effect of increasing the friction moment between the screw and soil. (6) the experimental value of the traction helical torque is basically in agreement with the theoretical calculation value; (7) the theoretical analysis and test results show that the principle of helical transmission is feasible in the construction of underground tunnel.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.31;U456
，
本文编号：2301003
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