對(duì)鐵路動(dòng)車組輪軸檢修工藝及裝備的探討

1、設(shè)備檢修從2007年4月18日中國(guó)鐵路首次在既有鐵路干線上開行200km/h 以上動(dòng)車組列車以來(lái),至今已有CRH系列4種動(dòng)車近200組(8輛編組上線,并陸續(xù)擴(kuò)展到新建成的鐵路客運(yùn)專線上運(yùn)行。部分動(dòng)車組已運(yùn)營(yíng)近2年,到了3級(jí)修修程(按鐵道部統(tǒng)一規(guī)定動(dòng)車組檢修實(shí)施15級(jí)修。根據(jù)測(cè)算:到2012年,我國(guó)鐵路營(yíng)業(yè)里程將達(dá)到11萬(wàn)k m,其中客專1.3萬(wàn)km要建成投入運(yùn)營(yíng),需要運(yùn)營(yíng)動(dòng)車組800組以上。因此,加速建設(shè)中國(guó)鐵路動(dòng)車組檢修基地已迫在眉捷。在動(dòng)車基地總平面布局、檢修板塊的主工藝流程基本確定情況下,如何細(xì)化,如轉(zhuǎn)向架輪軸等重大部件的檢修工藝流程和布局,選好關(guān)鍵設(shè)備(功能、技術(shù)參數(shù)、相關(guān)尺寸等尤為關(guān)

2、鍵。1輪軸檢修總體設(shè)計(jì)思想現(xiàn)代化鐵路動(dòng)車組檢修基地設(shè)計(jì),應(yīng)堅(jiān)持“先進(jìn)、成熟、經(jīng)濟(jì)、適用、可靠”的技術(shù)方針,科學(xué)合理布局,采用先進(jìn)檢修工藝及裝備,縮短動(dòng)車組在基地內(nèi)停修時(shí)間,努力降低維修成本,提高運(yùn)營(yíng)可靠性,確保動(dòng)車組具有良好運(yùn)行狀態(tài)。具體體現(xiàn)如下。(1滿足檢修工藝要求。縱觀C R H系列4種動(dòng)車組車型的性能、結(jié)構(gòu)、技術(shù)參數(shù)及相關(guān)尺寸,提出輪軸解體、檢修、組裝檢修流水線的作業(yè)工序及各工序配置設(shè)備在檢修區(qū)的合理布局,實(shí)現(xiàn)節(jié)奏合拍,工序流、物流、信息數(shù)據(jù)流的順暢,從而達(dá)到安全高效的目的。(2滿足檢修能力需求。檢修線上配置的設(shè)備能力在滿足檢修設(shè)計(jì)工作量需要的同時(shí),要考慮臨修作業(yè)的需要,并按耗時(shí)最大工序

3、(節(jié)拍時(shí)間和每天有效工時(shí)進(jìn)行計(jì)算。(3具有較高的設(shè)備兼容性。檢修線各設(shè)備基本上應(yīng)能兼容C R H系列動(dòng)車組車型,滿足輪軸檢測(cè)、檢修、試驗(yàn)的需要,但個(gè)別需要增加部分工序和輔助工裝。(4工藝結(jié)構(gòu)要符合人機(jī)工程學(xué)理念。從提高檢修作業(yè)效率、降低作業(yè)人員強(qiáng)度、節(jié)約車輛運(yùn)營(yíng)維修成本角度,應(yīng)優(yōu)先選用符合人機(jī)工程學(xué)理念的先進(jìn)、高效、實(shí)用的設(shè)備。2輪軸檢修工藝分析參照國(guó)外車輛制造商檢修工藝經(jīng)驗(yàn),結(jié)合我國(guó)鐵路車輛檢修做法,提出了以更換損壞或到期零部件與修復(fù)相結(jié)合的輪軸解體、組裝檢修流水線工藝方案。2.1CRH系列動(dòng)車組輪軸主要技術(shù)參數(shù)及結(jié)構(gòu)CRH型動(dòng)車組輪軸主要技術(shù)參數(shù)見(jiàn)表1,C R H型動(dòng)車組動(dòng)、拖車輪軸外形結(jié)

4、構(gòu)見(jiàn)圖15。2.2輪軸分解流水線2.2.1作業(yè)內(nèi)容輪軸分解流水線要完成C R H系列各型動(dòng)車組輪對(duì)的部件拆卸、除銹、脫漆、車軸清磨、清洗、檢測(cè)、齒輪箱供油、車輪踏面及制動(dòng)盤端面鏇修、齒輪箱排油等作業(yè)。2.2.2工藝流程根據(jù)4個(gè)動(dòng)車檢修基地輪軸檢修(35級(jí)修工作量測(cè)算,每一基地日檢修輪軸數(shù)近期約3040對(duì),遠(yuǎn)期5065對(duì)?？紤]到檢修區(qū)工藝布局,以設(shè)置輪軸分解流水線23對(duì)鐵路動(dòng)車組輪軸檢修工藝及裝備的探討邱建平摘要:對(duì)中國(guó)鐵路動(dòng)車組輪軸檢修工藝和裝備選型進(jìn)行分析研究,重點(diǎn)介紹總體設(shè)計(jì)思想、輪軸解體流水線、組裝流水線的工藝流程、平面布局、工裝設(shè)備配置原則、關(guān)鍵設(shè)備選擇等,提出了動(dòng)車組檢修基地輪軸車間

5、檢修工藝和設(shè)備配置初步意見(jiàn)。關(guān)鍵詞:動(dòng)車組;輪軸;檢修工藝;檢修設(shè)備邱建平:中鐵第四勘察設(shè)計(jì)院集團(tuán)有限公司設(shè)備設(shè)計(jì)處,副總工程師,高級(jí)工程師,武漢430063表1動(dòng)車組輪軸相關(guān)數(shù)據(jù)m m 名稱C R H1C R H2C R H3C R H5車輪直徑(括號(hào)內(nèi)915(835860(790動(dòng)車920(830890(810是磨耗后的極限值拖車920(860車輪寬度135135135135輪孔直徑動(dòng)車204.8±0.015201192拖車195.8±0.015196192輪制動(dòng)盤直徑640725750輪制動(dòng)盤厚度135133軸制動(dòng)盤直徑640670640640軸制動(dòng)盤厚度110978

6、0車軸內(nèi)孔60603065軸頸直徑130130130130軸身直徑170192166166車軸總長(zhǎng)(動(dòng)車/拖車2250/22502298/23822180/21802180/2180軌距1435143514351435固定軸距2700 2 5002 5002 700圖 1 CRH1動(dòng)車輪對(duì)圖2CRH1拖車輪對(duì)圖3CRH2動(dòng)車及拖車輪對(duì)條為宜。輪軸分解流水線工藝流程見(jiàn)圖6。2.2.3平面布局按照輪軸分解線主要工序,設(shè)定在轉(zhuǎn)向架輪軸檢修區(qū)的合理布局,既要滿足輪軸分解的檢修工藝要求,又要滿足上下工序之間有序銜接,保證工序流、物流、信息數(shù)據(jù)流的順暢。輪軸檢修分解線平面布局見(jiàn)圖7。2.3輪軸組裝流水線2

7、.3.1作業(yè)內(nèi)容輪軸組裝線要完成C R H系列各型動(dòng)車組輪對(duì)組裝檢修作業(yè),它包括輪對(duì)壓裝、電阻測(cè)試、輪對(duì)檢壓試驗(yàn)、空心軸探傷、齒輪箱清洗(預(yù)圖6輪軸分解線工藝流程圖安裝支承輪聯(lián)軸器拆卸軸箱拆卸收入檢查3級(jí)修動(dòng)輪是齒輪箱排油清洗否齒輪箱排油C R H2輪對(duì)是否軸端螺母拆卸軸端螺栓拆卸軸承拆卸C R H3輪對(duì)除漆清洗C R H3涂裝剝離輪軸清磨是否輪對(duì)自動(dòng)測(cè)量空心軸探傷3級(jí)修是否車軸磁粉探傷車軸磁粉清洗齒輪箱供油踏面摩擦面鏇修3級(jí)修是否車軸油漆烘干組裝線齒輪箱排油輪軸分解車輪線、車軸線-0.035-0.035圖7輪軸分解線平面布局圖留、齒輪箱注油、車輪踏面及制動(dòng)盤端面鏇修、車輪探傷、動(dòng)平衡試圖8輪

8、軸組裝檢修流水線工藝流程圖圖9輪軸組裝檢修流水線平面布局圖驗(yàn)、輪對(duì)涂漆烘干、軸頸清洗打磨、軸頸測(cè)量、軸承存放及壓裝、軸端螺母組裝、C R H 3型涂抹密封膠、軸箱組裝、聯(lián)軸節(jié)及接地裝置組裝、輪對(duì)回轉(zhuǎn)試驗(yàn)、輪對(duì)與構(gòu)架組裝等。2.3.2工藝流程輪軸組裝流水線數(shù)量同樣按各基地輪軸任務(wù)量配備,一般設(shè)2條線平行布置,輪軸組裝檢修流水線工藝流程見(jiàn)圖8。2.3.3平面布局輪軸組裝檢修流水線由控制、物流、工位、工裝設(shè)備等有序組成,其中輪對(duì)組裝控制系統(tǒng)具有數(shù)據(jù)分析處理功能,每個(gè)工位都有數(shù)據(jù)讀取軸端信息,并自動(dòng)顯示功能,檢修內(nèi)容上傳至數(shù)據(jù)庫(kù),為后續(xù)工位的檢修提供依據(jù)。輪軸組裝檢修流水線平面布局見(jiàn)圖9。檢修后的車軸

9、輪軸選配系統(tǒng)選出的車輪輪對(duì)壓裝電阻測(cè)試輪對(duì)檢壓試驗(yàn)空心軸探傷齒輪箱注油1型車3級(jí)修輪對(duì)車輪、制動(dòng)盤鏇修車輪探傷輪對(duì)動(dòng)平衡試驗(yàn)輪對(duì)涂漆及烘干軸頸清洗打磨軸頸測(cè)量軸承壓裝軸端螺母組裝1、2型車輪對(duì)3型車涂抹密封軸箱組裝聯(lián)軸節(jié)及接地裝置組裝輪對(duì)回轉(zhuǎn)試驗(yàn)通過(guò)天車將檢測(cè)不合格的輪對(duì)吊到組裝工位上進(jìn)行分解空心軸探傷齒輪箱去油清洗踏面鏇修輪軸涂裝剝離信息機(jī)房配電所車軸輸送小車輪對(duì)檢壓試驗(yàn)檢壓等待空心軸探傷齒輪箱注油車輪、制動(dòng)盤鏇修輪軸組裝線輪對(duì)組裝檢修方向車輪探傷動(dòng)平衡試驗(yàn)軸頸清洗打磨輪對(duì)3級(jí)修進(jìn)入方向輪對(duì)進(jìn)入方向軸承地下傳輸通道輪對(duì)涂漆及烘干軸承壓裝移動(dòng)式軸承退卸機(jī)軸徑測(cè)量軸端螺母組裝軸箱組裝聯(lián)軸節(jié)組裝輪

10、軸組裝線輪對(duì)組裝檢修方向輪對(duì)回轉(zhuǎn)試驗(yàn)輪軸組裝輪對(duì)壓裝同溫線同溫線車軸檢修后進(jìn)入方向車輪進(jìn)入方向電阻測(cè)試輪對(duì)輸送車去往輪軸分解齒輪箱排油3級(jí)修去往組裝線齒輪箱供油車軸磁粉清洗車軸探傷預(yù)留輪對(duì)自動(dòng)檢測(cè)車軸清磨輪對(duì)除銹清洗軸承拆卸軸端螺栓拆卸收入檢查軸箱退卸聯(lián)軸節(jié)及接地裝置拆卸輪對(duì)輸送車輪對(duì)組裝檢修方向 軸承存放3輪軸檢修關(guān)鍵工藝裝備3.1輪軸檢修工藝裝備配置原則(1適應(yīng)車型及修程需要。全路4個(gè)動(dòng)車組檢修基地配置車型略有不同,初步考慮每個(gè)基地承擔(dān)12個(gè)主型車型,12個(gè)兼容車型。因此,每個(gè)基地需要承擔(dān)主型車全部修程(35級(jí)修,兼容車型3級(jí)修。(2在百余項(xiàng)工裝設(shè)備中,自主開發(fā)的項(xiàng)目或核心部件需要引進(jìn)的設(shè)

11、備,有條件時(shí)應(yīng)優(yōu)先選用一機(jī)多用。例如,輪軸壓裝機(jī)不僅要實(shí)現(xiàn)車輪、大齒輪、制動(dòng)盤轂與車軸的冷壓組裝和高壓油組裝,同時(shí)能實(shí)現(xiàn)車輪、大齒輪、制動(dòng)盤轂和車軸的注油分解和輪對(duì)組裝后的檢壓測(cè)試。又如,車輪車床要選用既能加工車輪踏面,又能加工制動(dòng)盤端面的設(shè)備。(3按照動(dòng)車組基地檢修需求,不斷改進(jìn)和自主開發(fā)設(shè)備,量身定做;核心部件應(yīng)采用國(guó)際知名專業(yè)廠商的優(yōu)質(zhì)產(chǎn)品;對(duì)引進(jìn)設(shè)備部分功能盡快國(guó)產(chǎn)化配套,使性能更可靠,功能更強(qiáng)大。(4要有完善配套設(shè)施。除主機(jī)和附屬裝置外,配套設(shè)施應(yīng)包括設(shè)備基礎(chǔ),風(fēng)、水、電引入節(jié)點(diǎn)和廢汽、污水排放點(diǎn)等。3.2輪軸檢修設(shè)備配置為了便于分析,以主修CRH2、3型動(dòng)車組輪軸為例,提出設(shè)備配置

12、。輪軸分解線設(shè)備見(jiàn)表2。輪軸組裝線設(shè)備見(jiàn)表3。除各工位對(duì)應(yīng)的設(shè)備外,在輪軸分解和組裝線上還有輪軸分解和組裝線控制系統(tǒng)、輪對(duì)輸送車、輪對(duì)轉(zhuǎn)盤、扭矩測(cè)試儀、通用工具等設(shè)備。3.3關(guān)鍵設(shè)備選擇(1輪軸分解、壓裝、檢壓設(shè)備。除C R H1型動(dòng)車組輪軸組裝采用熱裝工藝外,其余車型輪軸分解、組裝均采用高壓注油工藝。通過(guò)比選,初步確定選用德國(guó)生產(chǎn)的輪軸分解、壓裝檢壓設(shè)備,該機(jī)擁有先進(jìn)成熟的液壓伺服技術(shù)、精確的測(cè)量系統(tǒng)、先進(jìn)的壓力補(bǔ)償功能以及可實(shí)現(xiàn)分解、組裝、檢壓車輪和制動(dòng)盤表2輪軸分解線設(shè)備工位名設(shè)備名稱聯(lián)軸節(jié)與接地裝置拆卸齒輪聯(lián)軸節(jié)及接地裝置拆卸軸箱退卸軸箱退卸機(jī)收入檢查輪對(duì)預(yù)檢和建檔裝置齒輪箱去油清洗齒

13、輪箱排油裝置齒輪箱高低速油清洗機(jī)軸端螺栓拆卸軸端螺母拆卸裝置軸承拆卸軸承退卸機(jī)輪對(duì)除銹清洗輪軸除銹清洗機(jī)車軸清磨車軸清磨裝置C R H3輪軸涂裝剝離C R H3輪軸涂裝剝離裝置輪對(duì)自動(dòng)檢測(cè)輪對(duì)尺寸自動(dòng)檢測(cè)機(jī)空心軸探傷空心軸超聲波探傷機(jī)車軸磁粉探傷輪對(duì)磁懸液探傷機(jī)車軸磁粉清洗磁粉清洗裝置齒輪箱供油齒輪箱注油機(jī)(移動(dòng)式車輪制動(dòng)盤鏇修車輪車床齒輪箱排油齒輪箱排油裝置表3輪軸組裝流水線設(shè)備工位名設(shè)備名稱輪軸預(yù)組裝裝置輪對(duì)壓裝輪對(duì)壓裝機(jī)輪輞內(nèi)側(cè)距檢測(cè)器輪位差檢測(cè)工裝電阻測(cè)試輪對(duì)接地電阻測(cè)量裝置輪對(duì)檢壓試驗(yàn)輪對(duì)檢壓機(jī)空心軸超聲波探傷機(jī)耦合劑容器防銹油容器空心軸探傷清除耦合劑工具涂抹防銹油工具標(biāo)定軸及托架轉(zhuǎn)

14、輪撥輪器工具柜齒輪箱注油齒輪箱注油機(jī)扭力矩扳手車輪、制動(dòng)盤車床車輪、制動(dòng)盤鏇修工具柜電動(dòng)砂輪機(jī)車輪探傷固定式輪輞輪輻超聲波探傷機(jī)標(biāo)定輪動(dòng)平衡試驗(yàn)動(dòng)平衡試驗(yàn)機(jī)轉(zhuǎn)輪撥輪器輪對(duì)涂漆及烘干輪對(duì)涂漆烘干裝置軸頸清洗打磨軸頸清洗打磨裝置標(biāo)記鋼印軸頸測(cè)量軸頸測(cè)量裝置軸承同溫存放架軸承內(nèi)孔測(cè)量裝置軸承壓裝工具柜軸承壓裝裝置軸承輸送裝置軸端螺母組裝裝置軸端螺母組裝扭力矩扳手螺栓、螺母托盤電動(dòng)扳機(jī)C R H3型車涂輪對(duì)舉升裝置抹密封膠軸箱組裝機(jī)螺栓等存放架軸箱組裝扭力矩扳手電動(dòng)扳機(jī)軸箱、螺栓托盤聯(lián)軸節(jié)及接地聯(lián)軸節(jié)組裝裝置聯(lián)軸節(jié)托盤裝置組裝感應(yīng)加熱器輪對(duì)回轉(zhuǎn)試驗(yàn)輪對(duì)回轉(zhuǎn)試驗(yàn)裝置的功能。該設(shè)備的主要參數(shù)如下。高壓油分

15、解:最高壓力>200 MPa,最大推力2500kN。高壓油組裝:最高壓力160M P a,最大推力2500kN。最大檢壓力為1600kN。(2輪對(duì)尺寸自動(dòng)測(cè)量機(jī)(非接觸高精度測(cè)量系統(tǒng)。引進(jìn)了瑞士生產(chǎn)的體積精巧的線性傳感器,并就不同的測(cè)量位置設(shè)置了不同的驅(qū)動(dòng)程序,使專用測(cè)量元件能實(shí)現(xiàn)水平、垂直兩方向的移動(dòng),從而全面兼容4種CRH 車型。該產(chǎn)品采用線性CCD 成像技術(shù),元件自身的測(cè)量精度可達(dá)±0.01mm,整個(gè)系統(tǒng)的測(cè)量精度為±0.05mm。(3車軸尺寸測(cè)量機(jī)(接觸高精度測(cè)量系統(tǒng)。該機(jī)引進(jìn)了德國(guó)生產(chǎn)的高精度光柵長(zhǎng)度計(jì)作為直徑測(cè)量元件,從根本上保證了測(cè)量尺寸的可靠性和真實(shí)性

16、。(4空心軸超聲波探傷機(jī)。2008年4月我國(guó)已研制開發(fā)出適合C R H 系列動(dòng)車組空心軸超聲波探傷作業(yè)的探傷機(jī),其關(guān)鍵部件采用德國(guó)產(chǎn)品,經(jīng)過(guò)西安、南昌等6個(gè)動(dòng)車運(yùn)用所使用,設(shè)備運(yùn)行穩(wěn)定。(5車輪探傷機(jī)。德國(guó)新近研制出的相控陣探頭,能對(duì)車輪輪輞、輪幅及其兩者過(guò)渡區(qū)進(jìn)行無(wú)損檢測(cè),能調(diào)節(jié)探頭的入射角及聚焦深度范圍,從而使得探頭數(shù)量大為減少,整個(gè)探頭系統(tǒng)結(jié)構(gòu)緊湊,操作靈活,圖像完整細(xì)微,便于缺陷評(píng)估分析等,該設(shè)備特別適合帶有輪裝制動(dòng)盤的車輪。4結(jié)論(1輪軸分解、組裝采用流水作業(yè)檢修方式,集控制、物流、設(shè)備、工位等一體的檢修線模式。(2流水線上按工序配置的設(shè)備要確保整個(gè)系統(tǒng)功能可靠、能力滿足要求、物流自

17、動(dòng)快速、工序柔性安全、維修操作方便,其總體技術(shù)水平要達(dá)到當(dāng)今國(guó)內(nèi)外同類產(chǎn)品的領(lǐng)先水平。(3引進(jìn)核心部件的設(shè)備,要逐步進(jìn)行國(guó)產(chǎn)化配套,有條件時(shí)應(yīng)盡快形成具有自主知識(shí)產(chǎn)權(quán)的產(chǎn)品。收稿日期2009-02-25 d =2(l2+(l -h 22(4(上接第24頁(yè)有關(guān)的斜剖面圖,由于傳感器相對(duì)于鋼軌的安裝位置是固定的,而車輛運(yùn)行速度已知,因此,通過(guò)幾何運(yùn)算,可以得到二維的車輪外形圖,并可分別計(jì)算輪緣高度和輪緣厚度。3.4輪徑測(cè)量鋼軌外側(cè)安裝了2只激光位移傳感器,其安裝角度為36°,分別掃描出輪緣及踏面的端面后,在速度已知的條件下,可得到弦長(zhǎng)l ,而兩激光束高度h 可以通過(guò)激光位置傳感器測(cè)量系統(tǒng)

18、測(cè)量得到,通過(guò)幾何運(yùn)算可得車輪直徑d (圖8。3m,而且傳感器安裝結(jié)構(gòu)設(shè)計(jì)要保證與鋼軌的電氣絕緣。(2傳感器防護(hù)。由于地鐵環(huán)境內(nèi)存在部分的粉塵,作為一種光學(xué)檢測(cè)設(shè)備,激光位移傳感器必須采取一定的防護(hù)措施。防護(hù)機(jī)構(gòu)應(yīng)安裝在預(yù)留設(shè)備坑里,防護(hù)門由轉(zhuǎn)角電機(jī)控制,當(dāng)控制系統(tǒng)檢測(cè)到來(lái)車時(shí),打開防護(hù)門,實(shí)現(xiàn)探測(cè),平時(shí)防護(hù)門處于關(guān)閉狀態(tài)。(3設(shè)備限界要求。設(shè)備安裝前應(yīng)進(jìn)行尺寸測(cè)算,仔細(xì)確認(rèn)所涉及的安全限界,標(biāo)出全部的限界尺寸,保證所有設(shè)備均不得侵入地鐵車輛、設(shè)備限界,以免影響地鐵列車的安全運(yùn)行。(4設(shè)備防電磁干擾要求。所有設(shè)備應(yīng)具有防電磁干擾的能力,且不能對(duì)地鐵車輛上安裝的各類設(shè)備及地鐵地面上安裝的各類設(shè)備

19、造成干擾。(5設(shè)備自保護(hù)要求。系統(tǒng)應(yīng)具有自保護(hù)功能,其原始數(shù)據(jù)任何情況下均不得丟失(可實(shí)時(shí)自動(dòng)轉(zhuǎn)存,且任何人均無(wú)法修改。電路的設(shè)計(jì)應(yīng)保證當(dāng)其某一元器件發(fā)生故障時(shí),對(duì)系統(tǒng)中任何其他元器件帶來(lái)的間接損壞為最小,同時(shí)應(yīng)保證系統(tǒng)的故障不擴(kuò)大化。(6系統(tǒng)報(bào)警軟件設(shè)計(jì)時(shí),需根據(jù)實(shí)際合理設(shè)置報(bào)警條件,增加標(biāo)準(zhǔn)參數(shù)與實(shí)測(cè)參數(shù)的對(duì)比曲線,避免誤報(bào)警次數(shù)太多,增加不必要的人工檢查次數(shù)。收稿日期2008-12-29圖8輪徑測(cè)量示意圖hl4注意事項(xiàng)(1傳感器安裝。所有傳感器的安裝必須方便可靠,不得大范圍破壞現(xiàn)有路軌條件的基礎(chǔ)施工(傳感器安裝基礎(chǔ)施工橫跨路軌范圍ABSTRACTS Applying the Scient

20、ific Outlook on Development to Promote the Construction of Urban Rail Transit -C Thinking on Current Construction Development of China Urban Rail Transit Jiao Tongshan 1 The construction of China Urban Rail Transit is now staying in the important time with rapid development. The achievements we obta

21、ined are objectively summarized. At the same time, the contradiction between the current construction speed and preliminary work, the construction procedure, the phenomena of despising operation, the unified planning of traffic integration, the control of construction standards, the difference of fa

22、re in domestic urban rail transit, as well as the enhancement of government management for urban rail transit are analyzed and investigated through some phenomena in the industry. Several suggestions are also presented. Practice and Thinking of Construction for Dispatch and Command System of Urban R

23、ail Transit Network Liang Ping, Du Shimin 5 Because the rail transit of major cities in China has successively entered the stage of network operation, the construction of network dispatch and command system is put on the schedule. In this paper, by using the construction for network dispatch and com

24、mand system in Beijing Urban Rail Transit as background, the practical experiences of the construction of network dispatch and command system are summarized and the suggestion is proposed. Discussion on UPS Integration of Signal System in Urban Rail Transit Wen Renguang 8 The safe and reliable requi

25、rements of signal system to UPS are described. The potential risk after UPS integration of signal system is analyzed in detail. It indicates that although UPS integration of transit system is the trend, it is still in the research and experiment stage. The UPS integration scheme involving signal sys

26、tem should be carefully considered. Localization of Filter Element of Air Compressor in EMU of Nanjing Metro Line 1 Deng Zhigang, Sun Gang 17 The air filter element, developed on the basis of the filter principles and the air compressor structure of braking system in Nanjing Metro, has experienced t

27、he examination by professional institution and 3-month on-board comparative test. It is proven that this air filter element has qualified performance and reliable quality, and can fully substitute the import air filter element. Design and Construction of Protective Blocking Gate System Zhao Jiajian,

28、 Wu Yue 19 The protective gate system is new type metro disaster prevention equipment with dual functions of flood-proofing and civil defence. The work principles and construction of protective blocking gate system are described by analyzing the functions and constitutes of metro protective flood-bl

29、ocking gate system as well as its interfaces with signal, environment control and station control systems. Discussion on Wheel and Axle Maintenance Technology and Equipment of Railway Multiple Units Qiu Jianping 25 The wheel and axle maintenance technology and the selection of equipment of China rai

30、lway multiple units are analyzed. In the paper emphasis is laid on the introduction of overall design idea, wheel and axle disassemble and assembly line, plane layout, technics equipment collocate and key equipment selection. The suggestion is presented for the maintenance technology and equipment c

31、ollocate in wheel and axle workshop of maintenance base for multiple units. Discussion on Calculation Method of PBA Construction Method for Mining Station under Structure-Soil Interaction Zhao Wei 32 PBA construction method (Pile-Beam-Arch Mining Method has been extensively applied in the design of

32、metro stations as the restriction of surrounding environment. This paper discusses the simplified issue by calculating the model under structure-soil interaction. Construction Technology of Shallow-Buried Tri-arch Large-span Tunnel Xu Xinyan 34 Combining with the construction of shallow-buried tri-a

33、rch tunnel in the section of Xiongmao Huandao Station?Andinglu Station (including connect line of Beijing Metro Line 10, the construction scheme, technical process and operation points of shallow-buried triarch tunnel are illustrated. Static Press Construction Method with PHC Prestressed Concrete Pi

34、pe Pile Kang Litao 38 Static press construction method with PHC pipe pile is a pile driving technology that uses static press pile machine to press the prestressed concrete pipe pile (PHC pile into the ground. It has the characteristics of low noise and pollution, a little influence on the soil laye

35、r and surrounding buildings, and a little damage to pile quality. The static press construction technology is applied in the pile construction for no-platform-column canopy project of reconstruction of Tianjin Station, and achieves well social and economic benefits. Security Risk Assessment of Track

36、 Area in Metro Construction Yang Jun, Wu Yongfang, Ji Xuewei, etc. 48 Based on the security risk analysis of possibility of accidents for construction vehicles passing the track area (including part of existing lines, the risk degree of operating personnel in dangerous environment as well as the con

37、sequence of accidents in Shenzhen Metro Line 1, the risk degree of construction in the metro track area is finally evaluated. According to the characteristics of track area construction and existing line transport, the effective emergency plan is established to ensure the security of personnel and construction t