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boulder小镇的湖边餐厅

留学生 2004年第5期 31-31页

作者：张玫

An experimental study:Integration device of Fiber Bragg grating and reinforced concrete beam for measuring debris flow impact force

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Journal of Mountain Science 2017年第8期14卷 1526-1536页

作者： ZHANG Shao-jie CHEN Jiang Key Laboratory of Mountain Hazards and Earth Surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of Sciences College of Architecture & Environment Sichuan University

The impact effect of boulder within debris flow is the key factor contributing to peak impact as well as to the failure of debris flow control work. So accurate measuring and calculating the impact force of debris flow can ensure the engineering design strength. However, limited to the existing laboratory conditions and piezoelectric sensor performance, it is impossible, based on the conventional measurements, to devise a computing method for expressing a reliable boulder impact force. This paper has therefore designed a new measurement device according to the method of integrating Fiber Bragg grating(FBG) and reinforced concrete composite beam(RCB) for measuring the impact force of debris flows, i.e. mounting FBG on the axially stressed steel bar in the composite beam at regular intervals to monitor the steel strain. RCB plays the role of contacting debris flow and protecting FBG sensors. Taking this new device as the experimental object, drop testing is designed for simulating and reflecting the boulder impact force. In a series of impacting tests, the relationship between the peak dynamic strain value of the steel bar and the impact force is analyzed, and based on which, an inversion model that uses the steel bar strain as the independent variable is established for calculating the boulder impact *** experimental results show that this new inversion model can determine the impact force value and its acting position with a system error of 18.1%, which can provide an experimental foundation for measuring the impact force of boulders within the debris flow by the new FBG-based device.

关键词： Fiber Bragg grating Measurementdevice Debris flow boulder Impact force

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Turbulence,aeration and bubble features of air-water flows in macro-and intermediate roughness conditions

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Water Science and Engineering 2011年第2期4卷 170-184页

作者： Stefano PAGLIARA Thendiyath ROSHNI Iacopo CARNACINA Department of Civil Engineering University of Pisa

Free surface flows aeration potential causing the in macro- and intermediate flow characteristics to vary roughness conditions have a high with slopes and discharges. The underlying mechanism of two-phase flow characteristics in macro- and intermediate roughness conditions were analyzed in an experimental setup assembled at the Laboratory of Hydraulic Protection of the Territory （PITLAB） of the University of Pisa, Italy. Crushed angular rocks and hemispherical boulders were used to intensify the roughness of the bed. Flow rates per unit width ranging between 0.03 m^2/s and 0.09 m^2/s and slopes between 0.26 and 0.46 were tested over different arrangements of a rough bed. Analyses were mainly carried out in the inner flow region, which consists of both bubbly and intermediate flow regions. The findings revealed that the two-phase flow properties over the rough bed were much affected by rough bed arrangements. Turbulence features of two-phase flows over the rough bed were compared with those of the stepped chute data under similar flow conditions. Overall, the results highlight the flow features in the inner layers of the two-phase flow, showing that the maximum turbulence intensity decreases with the relative submergence, while the bubble frequency distribution is affected by the rough bed elements.

关键词： turbulent flow, aeration characteristics boulder macro- and intermediate roughness correlation analysis two-phase flow

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Interlayer Prediction Method for Braid River Reservoirs in Offshore Oil Field

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Open Journal of Geology 2019年第5期9卷 245-256页

作者： Wei Wang Peng Meng Jie Tan Dongdong Yang Dong Zhang Bohai Oilfield Research Institute of CNOOC Ltd.—Tianjin Branch Tianjin China

The interlayer structure of braid river reservoirs is complex and the interwell prediction is difficult in offshore oil field. Taking CFD11-1 oilfield of NgⅢ sand as an example, based on layer contrasting, the interlayer is divided into muddy interlayer, clay boulder interlayer, and physical interlayer according to lithology. Under the guidance of sedimentary model, we use the geology statistical inversion method to predict the clay boulder interlayer, consistent with the dynamic characteristics of oil production which is used for the prior quality control. The results of this study can objectively reveal the characteristics of interlayer space distribution. Compared with the traditional multi-well comparison and stochastic simulation model, this method is applied to the offshore oil field which is character with wide well space, sparse well network, which has very high application value in predicting the interlayer and deploying of inter-well encryption in the similar oilfield.

关键词： Braid River Clay boulder Interlayer Inter-Well Predicting Geology Statistical Inversion

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Cover Story

Journal of Mountain Science 2019年第3期16卷 725-725页

The cover photo shows a big granite boulder named 'Anvil Stone', which is about 10 m high and is perching on another boulder. As its name suggests, the 'Anvil Stone' looks like an anvil due to its inward concave sidewalls. The 'Anvil Stone' is located on a mountainous ridge of the Little Sangpu Mountain of eastern Guangdong, China at approximately 93 m above sea level. The mountain opposite the 'Anvil Stone' in the photo is the Great Sangpu Mountain. The plain between the Great and Little mountains represent a faulty depression formed by Dongshanhu fault.

关键词： Story a big granite boulder mountainous

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