【摘要】：目前,地下工程的修建將大量遇到在土體建筑物基礎(chǔ)或地下建筑物或構(gòu)筑物之間隧道穿行施工的問(wèn)題。如今應(yīng)用廣泛的非開(kāi)挖施工技術(shù),諸如盾構(gòu)法和頂管法在長(zhǎng)距離和靈活轉(zhuǎn)彎穿行技術(shù)上難以滿足地下空間的施工要求,使得城市地下通道類建設(shè)和地下空間開(kāi)發(fā)受到極大限制。針對(duì)以上盾構(gòu)法和頂管法在施工方面的不足,促使了一種土中自牽拉行走式隧道掘進(jìn)機(jī)的誕生。文中介紹了與現(xiàn)有用途相同但行進(jìn)原理不同的盾構(gòu)法、頂管法、土中增阻式自行走隧道掘進(jìn)機(jī)等施工技術(shù)的應(yīng)用和研究現(xiàn)狀以及各自的頂進(jìn)力計(jì)算理論,還分析介紹了與現(xiàn)有原理相似但用途不同的螺旋錨的工作機(jī)理及其安裝扭矩的試驗(yàn)研究,對(duì)螺旋傳動(dòng)原理及螺旋槳的工作機(jī)理也進(jìn)行了分析。本文的主要研究?jī)?nèi)容是對(duì)掘進(jìn)機(jī)在行進(jìn)過(guò)程中螺旋與土體間摩阻矩的變化進(jìn)行研究分析,文中通過(guò)對(duì)螺旋結(jié)構(gòu)的簡(jiǎn)化處理,推導(dǎo)出了牽拉螺旋摩阻矩的計(jì)算公式。經(jīng)過(guò)對(duì)現(xiàn)場(chǎng)試驗(yàn)結(jié)果與理論值的比較分析以及對(duì)試驗(yàn)數(shù)據(jù)的分析,主要得出以下結(jié)論:(1)保證兩個(gè)牽拉螺旋的同步異向旋轉(zhuǎn)是實(shí)現(xiàn)掘進(jìn)機(jī)自行走的關(guān)鍵;(2)對(duì)于該試驗(yàn)場(chǎng)地的土體來(lái)說(shuō),有軸螺旋可以提供更大的牽拉力;(3)在研究范圍內(nèi),隨著螺旋旋入土體長(zhǎng)度的增大,螺旋與土體間的摩阻矩也在不斷增大;(4)掘進(jìn)機(jī)在行進(jìn)的過(guò)程中,左右兩個(gè)牽拉螺旋扭矩的變化趨勢(shì)基本一致;(5)土體的擠壓密實(shí)效應(yīng)對(duì)螺旋與土體間的摩阻矩有增大效果;(6)牽拉螺旋扭矩的試驗(yàn)值與理論計(jì)算值基本吻合;(7)理論分析和試驗(yàn)的結(jié)果表明螺旋傳動(dòng)原理在地下隧道施工中的牽拉自身主動(dòng)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.
【學(xué)位授予單位】：北京工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U455.31;U456
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本文編號(hào)：2301003