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1997 Vol. 14, No. 2
Published: 1997-02-15
7
DESCRIPTION AND REFLECTION ON DEVELOPMENT OF GIS IN RAILWAY DEPARTMENTS
Zhuo Baoxi
The develo ping conditions of sev eral essential GIS in railw ay depa rtment s are introduced brief ly a nd to the point. The achiev ements of GIS in rai lway depa rtment s a re affi rmed. Meanwhile, the existing pro blems and mat ters needing a ttention in the process o f i ts dev elo pment are proposed.
1997 Vol. 14 (2): 7-13 [
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14
DISCUSSION ON INTERFACE CONTROL FOR SURVEY-DESIGN OF BRIDGE AND CULVERT
Shen Quanzeng
In the pro cedure of the surv ey-desig n of the bridg e a nd culv ert , there are sev era l interfaces produced f rom the connectio n of the informa tion t ransmission. The essentials and the methods for co ntrol ling these interfaces a re propo sed. Based on the interface cont rol, the quality of desig n may be rai sed, and the fai lure of desig n and eng ineering may be av oided.
1997 Vol. 14 (2): 14-16 [
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17
ANALYSIS OF EFFECT ON TRAFFIC-CARRYING CAPACITY BY RUNNING RAPID-SPEED TRAIN ON BUSY TRUNK LINES
Xu Qiuhan
Based o n the resea rch o n raising speed a t the Zheng zho u-Baoji Section of Longhai Rai lway , the rela tions betw een the di fferent compositions o f running speed fo r passeng er and f reig ht t rains and the co rresponding chang e o f deductive co ef ficient fo r passeng er trains are analy zed. The effect s on the t raffic-ca rrying capaci ty under the di fferent o bjectiv e speed are ex plo red. Sev eral o pinio ns a nd sug gestio ns a re propo sed concerned wi th the matching relationship betw een the passeng er and the f reigh t train speed during raising speed and o ther relativ e problems.
1997 Vol. 14 (2): 17-22 [
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2425
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23
3-D STRUCTURAL ANALYSISMETHOD BASED ON ALL SHELL ELEMENTS OF STEEL BRIDGE
Zheng Kaifeng Ta ng Jisun Wang Yingliang
There are some sho rtcoming s in t radi tio nal methods of structural analy sis based o n pin-jointed truss members and beam elements, such as inaccurate descriptio n o f co nnection among the members of t russ and betw een the members and deck system, a nd ov erloo king effect s on cross width of members of truss. Suitability of all shell elements mo del in steel bridg es i s a naly zed in this article. The method o f establishment a nd implementatio n o n this computing model of 3-D st ructural analy sis in long spa n steel bridg es is presented. The new model i s univ ersal in the computatio n of steel bridg es.
1997 Vol. 14 (2): 23-28 [
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2495
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29
SEVERAL OPINIONS ON RIGIDITY OF RAILWAY BRIDGES
Zhao Yucheng
The relatio ns betw een the rigidi ty o f rai lway bridg es a nd the running speed of t rains, the deflection curv es of the simply supported beams a nd the calculatio n and practica l o bserv atio n methods for the def lectio n of the trusses are described and di scussed. The requirements o n the rigidi ty of the lo ng span railw ay bridg es a re also propo sed.
1997 Vol. 14 (2): 29-36 [
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37
STUDY ON ANTI-WIND DESIGN FOR LONG-SPAN AND HIGHPIER EMERGENCY STEEL BRIDGE
Huang Yaoyi
Based o n the research fo r the characters of aeroelastic dy namic respo nse in the lo ng-span emerg ency steel bridg e with hig h-piers, the applied desig n methods to guarantee the bridg e wi th anti-w ind reliabi li ty , driving safety and aerody namic stabili ty are proposed.
1997 Vol. 14 (2): 37-48 [
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2436
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49
ANALYSES ON CAUSE OF FORMATION FOR FAULTED LARGE-DIAMETER LONG CAST-IN-PLACE CONCRETE PILES AND THEIR PREVENTIVE AND REINFORCING TREATMENTS
Wa ng Wuqin
Based o n the practical co nst ructio n ex amples of the bo red piles, the cause of fo rma tion fo r dif ferent kinds o f the faulted piles a re analyzed. Thei r preventive measures and reinfo rcing t reatments are di scussed. The perfect di rections fo r using the hig h-pressure w ater- jet cut ting method and the rota ry-injection g routing metho d are also propo sed.
1997 Vol. 14 (2): 49-55 [
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2385
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56
EXPLORATION ON RAISING TECHNICAL LEVEL FOR THE “ ADDITIONAL BRIDGE STRUCTURE ON EXISTING BRIDGE”
Zhang Yo ng bao
The special measures are pro po sed for raising the technical lev el of the “ Addi tional Bridg e St ructure on Ex isting Bridg e” technique. The analyses a nd di scussio ns proceed theo retically in o rder to make the wo rking mechanism of this technique more reaso nable, to improve the load bea ring condition o f the exi sting bridge and to rai se the loading capactiy of the w hole bridg e furthermo re.
1997 Vol. 14 (2): 56-59 [
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2489
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60
APPLICATION OF BI-ADMIXTURE TECHNIQUE IN TUNNEL LINING
Zho u Wenhai
The paper int ro duces the applicatio n o f bi-admix ture technique in tunnel lining fo r the Sipujian Tunnel, so tha t the quality of co ncrete w as increased and the cost o f const ruction w as reduced. The design procedure and th e calculating method of mix ture ratio fo r adding the flyash a nd the dewa tering agent are ex pounded. This technique has reference v alue fo r the tunnel co nst ructio n.
1997 Vol. 14 (2): 60-64 [
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2417
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65
SINGLE-END RAPID TUNNELLING TECHNIQUE AT EXIT OF LARGE CROSS-SECTION PARALLEL DRIFTON NO.Ⅱ LINE OF QINLING TUNNEL
Gou Biao Zhang So ng bai
Problems concerned w ith the construction orga nization and the mecha ni zatio n o f equipment s fo r the Qinling ex tra-lo ng tunnel are int roduced. The paper expounds mainly the technical o rg ani za tion measure fo r rapid tunnelling , i ts procedures and ex periences, and the ex cellent ef fect obtained in recent y ears.
1997 Vol. 14 (2): 65-80 [
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2411
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81
Exploration on Effect of Ground Stress upon Tunnel Construction at Qinling Section of Xi 'an- Nanjing Railway Line
Wei Guo 'a n
Based o n the fi rstha nd informa tions o btained from autho r 's investiga tio n in situ and the info rmatio ns collected from o ther regio ns, the a nalyses and the compari sons betw een these info rmatio ns are put fo rw ard. The evo lutio n o f the st ructural st ress field i s a naly zed qualitativ ely. And the amount o f g round st ress a nd it s ef fect on tunnel co nst ructio n are decided preliminari ly.
1997 Vol. 14 (2): 81-87 [
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2527
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88
RESEARCH ON RELATION BETWEEN CONCRETE STRENGTH AND STRESS WAVE VELOCITY
Guo Xiuqin Fang Licheng
Based o n the experiment s o f 1000 set s o f co ncrete pa rts in room for a y ea r, the rela tion 's fo rmula and curv e fo r concrete st reng th ( R ) and st ress w av e v elocity ( V ) are determined. They are v aluable as reference fo r the engineering testing.
1997 Vol. 14 (2): 88-98 [
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2403
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99
CONSTRUCTION METHOD WITH CLOSE PART OF ARTERY AND ORGANIZATION OF ENFORCEMENT WHEN DOUBLETRACK RAILWAY OPEN TO TRAFFIC
Xie Xinmin
By use of examples, w e wil l talk about how to draw up co nst ructio n method w ith close pa rt of artery a nd the main point s of co nst ructio n orga nization w hen double-t rack rai lw ay open to t raffic.
1997 Vol. 14 (2): 99-102 [
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2468
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103
Two Technical Problems of High-Speed Railway Should Be Solved Urgently
Wu Cheng san
Af ter fiv e years operatio n of the Germa ny hig h-speed lines, a serious defo rmation o f the track w as produced due to swing v eloci ty o f t rain. By applicatio n of lo ng sleeper, hig h elastic rail fastening , etc. the stabili ty o f t rack can be improv ed.
1997 Vol. 14 (2): 103-106 [
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2527
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107
Exploration on Synthetic Optimization of Objective Speed for High- Speed Railways
Li Yuanfu Hao Ying Ma Wei
In accorda nce wi th the speciali ties of selecting the o bjectiv e speed for high-speed railw ays concerned wi th many facfo rs including no t only the quanti ta tive facto rs but also the qualitativ e facfors, and combined with the compari son and the selection of the objectiv e speed for the Jing-Hu hig h-speed railw ay , a synthetic optimi za tion method has been proposed by applying a multi lev el sy nthetic ev alua tion digi tal model based on the fuzzy mathematics.
1997 Vol. 14 (2): 107-112 [
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2377
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113
Elementary Analyses on Schemes of Leading Jing-Hu High-Speed Railway into Beijing Terminal
Xu Li sheng
The paper int roduces the general si tuatio n of the Bei jing Terminal , a nd a naly zes the selection of the tw o connectio n schemes tow ards the Bei jing Rai lw ay Statio n and the Beijing West Railw ay Sta tio n fo r leading the Jing-Hu High-speed Railway into the Beijing Terminal. Meanwhile, the following aspect s are propo sed, such as the po ssibi li ty o f co nst ructing a new hig h-speed passeng er railw ay station in the terminal, and the analyses o n routing schemes of the hig h-speed railw ay lines into the terminal. The posi tion of high-speed locomo tiv e and car depo t a nd the optimum dista nce betw een the depot and the depar ture station o f the high-speed trains a re also pro po sed.
1997 Vol. 14 (2): 113-117 [
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2439
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118
FULLY FILLED WITH GEOLOGIC HAZARDS IN NAN-KUN RAILWAY
Lu Yulong Shuai Shiw en
Nan-Kun railw ay w as fully fi lled wi th the geologic hazards, such as the fault zone, la ndslide, ex pansiv e rock, hig h pressure g as, high g eostress and so for th. All type of g eo logic hazards had a v ery w ide di stribution. There w ere serious ef fects on the cost , quali ty and time o f completion. The surv ey and const ructio n fo r the prev entiv e mea sures o f the g eolo gic ha zards a re analy zed in the pa per.
1997 Vol. 14 (2): 118-125 [
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2404
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126
RESEARCH ON LAW OF DISTRIBUTION FOR DIFFERENT DEPTH OF DECOMPOSED GRANITE IN XIAN-ANKANG RAILWAY LINE
Meng Xia ng lia n Mao Jiao 'a n
Star ted wi th ana lysis from the inf luential facto rs on the weathering of rocks, the law o f w eathering of the g rani te on the Xi 'an-Ankang Railw ay Line i s ex plo red. Then, the di st ribution law of the w ea thering decompo sed layer w ith di fferent depth has been giv en in the pa per.
1997 Vol. 14 (2): 126-129 [
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2426
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130
3D-FEM SIMULATION OF QINLING TUNNEL THROUGH Fq7 FAULT FRACTURED ZONE
Zhang Xingw en Qiao Chunsheng
This paper presents a simulatio n of the ex cav atio n of Qinling tunnel g oing th ro ug h fq7w eak zone by 3D finite element method. It a nalyses the defo rmatio n, st ress di st ribution and the f ractured zo ne of the sur ro unding ro ck in the ex cava tio n process. The resul ts set up a scientific basis for safe co nst ructio n o f the tunnel.
1997 Vol. 14 (2): 130-136 [
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2409
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137
CENTRIFUGE MODELLING TESTS ON EXPANSIVE SOIL EMBANKMENT IN NANKUN RAILWAY
Wa ng Ying Han Hui zeng Han Tong chun
Through cent ri fuge modelling test s o n ex pansiv e soi l emba nkment in Nankun Rai lway , the cha racteristics o f st resss-st rain under dif ferent condi tio ns are o btained. The data can supervise the co nst ructio ns in-si tu.
1997 Vol. 14 (2): 137-145 [
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2447
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146
MACHINERY MAINTENANCE SYSTEM IN RAILWAY CONSTRUCTION OF CHINA
So ng Chenxiang Liu Chun Xu Anhua
This paper int roduces a number of ex perience abo ut that the China Rai lway Engineering Co rpo ratio n ( CREC ) ca rry out the “ co ndi tion repai r sy stem” w hich includes st reng thenning compulso ry daily service, reinforcing manag ement of oil and w ater , set ting up a reasonable system abo ut the co ndi tio n testing and diag no sing. There a re certain ro le in reference to reform the machinery repai r sy stem o f co nst ructio n enterprises.
1997 Vol. 14 (2): 146-149 [
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2404
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150
TESTING RESEARCH IN SITU BY USING DEEP-HOLE BLAST TECHNIQUE TO IMPROVE QUALITY OF BLASTING
Zhao Yuliu
An adv anced deep-hole blast tech nique w as adopted in the fi rst-stag e engineering w o rk o f la nd lev elling for const ructing a new chemical facto ry at Ning bo. Acco rding to the specialities o f this engineering w ork, based on the testing resea rch in si tu, the economic reasonable heig ht of the bench cut and the sui table resistant depth o f the subsoil were selected. Otherwise, acco rding to the topog raphic and geologic conditions, bet ter ideal di rving di rection o f blast and o ther technical measures w ere ado pted. Thus, the quali ty of blasting w as improved, the si ze of f ractured block w as in accorda nce w ith the desig n requi rement , harmful effect s of blast w ere decreased, and the o n-time accomplishment of the engineering pro ject w as g ua ra nteed.
1997 Vol. 14 (2): 150-156 [
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2433
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157
ELEMENTARY OPINION ON ENVIRONMENT FOR TALENTS IN CONSTRUCTION ENTERPRISES
Liu Keren
The co nst ructio n enterprises and the speciali ties of their talents a re a naly zed briefly. The construction enterpri ses must establi sh an envi ronment wi th proper public o pinions for their talent s, i. e. the excellent dev eloping and employing envi ronments. The autho r proposes hi s opinion empha tically o n employing the talents f rom the v iew points of dev otio n, cooperatio n, competi tio n, improvement , etc. The measures w hich should be ado pted are also proposed.
1997 Vol. 14 (2): 157-161 [
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162
METHODS TO PROMOTE YOUTH IN TECHNICAL STAFF TO BECOME TALENTS
Chen Ximin Xia Hongbo
Based o n the speciali ties of the w o rks o f the rai lw ay surv ey and desig n department s, w e should establi sh and amplify the envi ro nment sui ta ble for the g row th o f fhe youth in technical staf f and the corresponding enco urag ement systems. As the y oung peo ple g raduated a nd w ere employ ed by rai lw ay surv ey and desig n depa rtment s, they should be put o n a series of practica l surv ey , desig n, resea rch and construtio n wo rks, so that they may receiv e a systema tical t raining to become the talents. The corresponding encourag ement sy stems are the sy stem to assess technical proficiency, to be promoted to a higher of fice and ra nk, encourag e a nd rew ard, selectio n, etc.
1997 Vol. 14 (2): 162-165 [
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166
INVESTIGATION AND ANALYSIS ON ALLOCATING TECHNICAL CADRES IN GRASS-ROOTS UNIT OF CONSTRUCTION ENTERPRISES
Shan Renping
Based o n the universa l inv estig atio n for present state o f special tech nical cadres the of bui lding t roo ps in the Third Engineering Bureau o f MO R, the exi sting questio ns during allo cating tech nical perso nnels in g ra ss-root s co nstruction uni t are analyzed, and the co rrespo nding so lving measures are proposed in this paper.
1997 Vol. 14 (2): 166-170 [
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171
IN THE NINTH FIVE-YEAR PERIOD, THE DEVELOPMENT OF THE DIVERSIFIED ECONOMY EXIST PROBLEMS AND COUNTER-MEASURES.
Shao Wei
As the reform and open policy has been dev eloped in depth, the co nstruction enterpri ses of MO R w ould bring o ut the `Tw o Fundamental Cha racter Cha ngesand fo rm the new st ructure of the develo pment o f the div ersified economy. The autho r propo ses sev eral o pinions on how to face wi th this challeng e.
1997 Vol. 14 (2): 171-175 [
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176
QUESTIONS ON DEVELOPING SUPERVISING AND MANAGING OF RAILWAY CONSTRUCTION
Chen Ming ze
Acco rding to the fundamental principles o n the co ndi tions of the FIDIC co nst ruction cont ract , by means o f the compa red a nalyses on superv ising and ma naging of co nst ruction betw een the railw ay and o ther indust ry, a number o f sugg estions o n developing supervising a nd manag ing o f rai lway const ruction are proposed.
1997 Vol. 14 (2): 176-179 [
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2394
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