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Several issues to be further considered in construction of Bohai Strait crossing passage

Hong Kairong

Strategic Study of CAE 2013, Volume 15, Issue 12, Pages 80-84

Abstract:

Bohai Strait crossing passage is a strategic project, which has a significant role in boosting the development of Bohai surrounding economic zone and East China. In the paper,the construction mode,longitudinal profile, construction methods and planning of Bohai Strait crossing passage is further studied on basis of the common concept of tunnel crossing Laotieshan waterway. It is proposed that the form of full tunnel with two underground stations built in backfilled ground in the sea should be adopted for Bohai Strait crossing passage and that the tunnel should be constructed by open tunnel boring machine (TBM) method, with drill and blast as the assisting method.

Keywords： strait tunnel construction method construction planning shaft arrangement

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Research and industrialization of near-net rolling technology used in shaft parts

Zhenghuan HU, Baoyu WANG, Zhenhua ZHENG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1, Pages 17-24 doi: 10.1007/s11465-018-0480-3

Abstract:

Shaft part rolling is an efficient and green near-net shaping technology offering many advantages,In this paper, the features of shaft part rolling are introduced along with the working principles oftwo main shaft part rolling technologies, namely, cross wedge rolling (CWR) and skew rolling (SR).Finally, the latest developments in shaft part rolling are presented, including SR steel balls, preciseAlthough the shaft part rolling technology has been widely used in China, it only accounts for about

Keywords： cross wedge rolling skew rolling near-net rolling shaft part

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The Research of Steel and Glass Fiber Reinforced Plastic Guide of Mining Shaft

Zeng Xiantao,Guo Jinpu

Strategic Study of CAE 2002, Volume 4, Issue 12, Pages 71-76

Abstract: fiber reinforced plastic has been developed and researched in view of the present situation that the shaftThe corrosion resistance of the guide can meet the needs of mining shaft use, and the corrosion resistant

Keywords： mining shaft glass fiber reinforced plastic (GFRP) guide

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Conserved gene arrangement in the mitochondrial genomes of barklouse families Stenopsocidae and Psocidae

Xiaochen LIU, Hu LI, Yao CAI, Fan SONG, John-James WILSON, Wanzhi CAI

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 3, Pages 358-365 doi: 10.15302/J-FASE-2017158

Abstract: Substantial variation in gene organization and arrangement has been reported for sequenced mitochondrial

Keywords： gene rearrangement mitochondrial genome Psocoptera Stenopsocidae TDRL model

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Stress observation of shaft lining wall during construction and initial operation

Wen Dehua

Strategic Study of CAE 2012, Volume 14, Issue 2, Pages 80-84

Abstract:

For searching the stress and deformation law of blended shaft-liningduring construction and initial operation, sensors were buried in interior and exterior wall of shaft-liningWith the law, we can forecast the long-term safety of shaft lining and provide scientific decision evidence

Keywords： shaft lining monitoring thick topsoil strain additional force

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Task Arrangement of the IPD Process Plan

Lu Jianxia,Cheng Chengsong,Lan Xiuju,Chen Yong,Xie Liewei

Strategic Study of CAE 2004, Volume 6, Issue 5, Pages 56-60

Abstract:

This paper is related to task arrangement of the IPD process plan.The task arrangement modeling and related Hungary algorithms is given with conception of cost matrix,

Keywords： IPD task arrangement process plan goal decision

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Exhaust hood for steam turbines-single-flow arrangement

Michal HOZNEDL , Ladislav TAJC , Jaroslav KREJCIK , Lukas BEDNAR , Kamil SEDLAK , Jiri LINHART ,

Frontiers in Energy 2009, Volume 3, Issue 3, Pages 321-329 doi: 10.1007/s11708-009-0039-4

Abstract: from the development of double-flow turbines form the basis for the design of the single-flow turbine arrangementThere are still some limitations in applying this arrangement.

Keywords： exhaust hood steam turbines single-flow arrangement

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Monitor and control of ultra deep shaft safety and efficient construction

Shen Weian,Liang Hengchang,Zhao Guangsi

Strategic Study of CAE 2012, Volume 14, Issue 2, Pages 45-48

Abstract:

With the increase of the depth of shaft construction, shaft wall safetyTo ensure the safety and shaft wall construction safety and other factors, the real-time control andBase on the background of Benxi Dataigou Iron Mine's ultra-deep shaft with diameter of 6.5 m, depthof 1 640 m, the paper proposed methods to monitor the shaft wall safety and the condition of constructionThe monitor system implementation plan may provide detailed information for ultradeep shaft efficient

Keywords： ultra deep shaft safety information construction monitor and control

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Study on shaft drilling and blasting construction risk analysis and countermeasures of Bohai Strait tunnel

Zhang Wenxin and Zou Chong

Strategic Study of CAE 2013, Volume 15, Issue 12, Pages 101-106

Abstract:

In view of the shaft construction risk analysis of Bohai Strait tunnelthe sequence in turn from low to high is supporting structure failure risk, natural disaster risk and shaftConsidering the influences of key risk and other risks on the shaft construction,we put forward responsemeasures about shaft construction risk of Bohai Stiait tunnel from the geological forecast,shaft hoistingprevention, shaft supporting structure for quality control and the establishment of the shaft system

Keywords： strait tunnel shaft construction drilling and blasting method risk analysis response measures

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Construction technology of well shaft tower construction engineering

Yang Yiming,Huang Jiapin,Shen Xihua,Cao Yueqin and Ma Zhimin

Strategic Study of CAE 2012, Volume 14, Issue 2, Pages 85-89

Abstract:

Taking the construction of the main shaft hoisting in Longgu 1# CoalMine for example, the organizational characteristics of the well shaft tower and equipments, elevatorother parallel operation of installation construction were introduced, and the technologies of tower shaft

Keywords： parallel operations well tower sliding shaft equipment elevator installation construction technology

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The vertical shaft construction-technology of the cutter transformation of large-diameter shield

Wang Zhenfei,He Feng,He Shanning

Strategic Study of CAE 2010, Volume 12, Issue 12, Pages 103-107

Abstract:

Taking vertical shaft construction of the cutter transformation of theconstruction of cutter structure transformation under complex boundary conditions for large-diameter shield shaftPractice about how to ensure the structural safety of the shaft as well as well-coordinated shield construction

Keywords： large-diameter shield transformation shaft complex conditions

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Assessment of Mechanical Characteristic for Reinforced Concrete Precast Arc Shaft Lining

Rong Chuanxin,Wang Xiuxi,Cheng Hua

Strategic Study of CAE 2005, Volume 7, Issue 7, Pages 43-49

Abstract:

Assessment of mechanical characteristic for reinforced concrete precast arc shaft lining is achievedAt the same time, the load carrying capacity of the high strength reinforced concrete precast arc shaftTherefore for designing the high and strong reinforced concrete precast arc shaft lining, the ratio of

Keywords： high strength reinforced concrete precast arc shaft lining mechanical characteristic finite element method

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Alluvial channel hydrodynamics around tandem piers with downward seepage

Rutuja CHAVAN, Wenxin HUAI, Bimlesh KUMAR

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6, Pages 1445-1461 doi: 10.1007/s11709-020-0648-x

Abstract: In this paper, we report the turbulent flow structures and the scour geometry around two piers with different diameters. An experiment was conducted on a non-uniform sand bed with two types of tandem arrangements, namely, pier (T1) with a 75 mm front and 90 mm rear, and pier (T2) with a 90 mm front and 75 mm rear, with and without-seepage flows, respectively. A strong wake region was observed behind the piers, but the vortex strength diminished with downward seepage. Streamwise velocity was found to be maximum near the bed downstream of the piers and at the edge of the scour hole upstream of the piers. Quadrant analysis was used to recognize the susceptible region for sediment entrainment and deposition. Upstream of the piers near the bed, the moments, turbulent kinetic energy (TKE), and TKE fluxes were found to decrease with downward seepage, in contrast to those in a plane mobile bed without piers. The reduction percentages of scour depth at the rear pier compared with the front one were approximately 40% for T1 and 60% for T2. Downward seepage also resulted in restrained growth of scouring with time.

Keywords： scour seepage Strouhal number tandem arrangement turbulent characteristics

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The location choice and construction technology of shafts in Bohai Strait tunnel

Wang Yunlong,Tan Zhongsheng

Strategic Study of CAE 2013, Volume 15, Issue 12, Pages 85-89

Abstract: construction and operation ventilation and the research of the island sites,the feasibility of the shaftroad tunnel,a molding method of drilling and blasting was used to construct the Bohai Strait tunnel shaft; the main measure of the construction of shaft topsoil should be plugging; the main technology program

Keywords： subsea tunnel shaft ventilation construction technology

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Application of New Technology in Underground Engineering

Ma Hongqi

Strategic Study of CAE 2002, Volume 4, Issue 11, Pages 37-41

Abstract: Successful performance has been achieved in inclined-shaft construction of Guangzhou Pumped-storage Projectby improving and bettering a set of interval inclined-shaft slipform imported.The self-innovated and patented XHM-7 inclined-shaft slipform equipment used in the long inclined-shaftTianhuangping Pumped-storage Project has realized the consecutive rising of the concrete lining in the inclined-shaft

Keywords： hydropower underground engineering manifold inclined-shaft new technology