龙滩大法坪砂石加工系统圆筒洗石机的改造

介绍大法坪砂石加工系统圆筒洗石机的使用中存在的问题和缺陷，并对其原因进行分析，提出解决的措施和改造。通过解决圆筒洗石机振动和链条润滑不充分等关键缺陷问题后提高了设备的利用率和运行效率，发挥了圆筒洗石机的效能。     

平班水电站左岸重力坝常态混凝土配合比优化设计

根据平班水电站所采用原材料的特性,经过混凝土配合比优化设计试验,应用混凝土"双掺"技术及粉煤灰"超代"技术,揭示了各原材料相互间的组合及变化规律,改善和提高混凝土的技术性能,达到保证满足工程技术要求以及经济、节约目的.     

左江水利枢纽厂房及闸坝金属结构设计简介

简介左江水利枢纽水电站厂房及闸坝金属结构系统的组成、布置及结构设计。其金属结构设备有各种门(栅)44道,各种闸门、拦污栅28扇,各种启闭机18台套,设备总重2100t。工程建成后,运行情况良好。     

A computational model for reinforced concrete members confined with fiber reinforced polymer lamina: Implementation and experimental validation

This study presents a computational model to simulate the behavior of confined concrete in column plastic hinge zones. The model describes the distribution of confining stresses within a circular column cross-section and the hysteretic behavior of concrete under passive confinement. Of particular interest is the ability of the model to predict the maximum circumferential strains and thus estimate the limit state of the confining medium rather than relying on empirical limits such as concrete compressive strain or drift ratio. This is performed with fiber-discretized beam column analysis without the computational expenses of a continuum finite element (FE) model. The confined section and material model are implemented in an object-oriented computational platform for structural analysis. New classes are developed and presented for a confined fiber section, a confined concrete material, and associated hysteretic behavior rules. Finally, the results from two experimental programs on columns strengthened using fiber reinforced polymer (FRP) lamina are reproduced using the developed computational model. Comparison of simulation and experiment shows that the computational model can closely match the observed response characteristics and can adequately predict the deformation level leading to FRP rupture.     

反射波法在隧洞衬砌空穴检测中的应用

简要介绍了反射波法在凤亭河水库放水隧洞工程中衬砌空穴检测的应用情况,并结合施工开挖资料对应用效果进行评价.     

百色盆地林蓬浅层稠油油藏热采开发的可行性研究

百色盆地林蓬油藏为一浅、薄、低产、低渗的普通稠油构造油藏。通过对油藏特征、原油热物性、热采数值模拟初步分析及热米开发经济效益的初步评价，认为林蓬油藏利用我国现有的热采技术投入开发具有可行性，并提出了具体实施方案和工作意见．     

洞巴水电站面板坝工程施工综述

文章介绍了洞巴水电站面板坝工程关键施工技术措施和科学、高效能的施工管理以供同行参考.     

高碾压混凝土双曲薄拱坝坝基开挖预裂爆破技术

结合大花水水电站大坝工程地质条件，通过分析岩层具体情况，采用预裂爆破施工技术，合理施工方法进行坝基开挖，并对爆破参数和装药结构的设计，钻孔的角度控制和梯段高度精心确定，使该边坡开挖预裂取得良好的效果，保证了坝基开挖的质量要求。     

广西河道管理和保护范围确权划界探讨

分析了广西河道管理范围和保护范围确权划界工作存在的问题,总结了广西近年来河道管理范围和保护范围确权划界的做法和经验,提出了下一步促进河道管理范围和保护范围确权划界工作的思路.     

Interpretation of the morphology and crystallography of precipitate γ1-Ti4Nb3Al9 in L10-TiAl(Nb)-based intermetallics by invariant line theory

The coherent precipitate γ₁-Ti₄Nb₃Al₉ in the Nb-modified TiAl-based intermetallic compound with a nominal composition of Ti–48 at% Al–10 at% Nb was investigated by transmission electron microscopy. The crystallographic and morphologic characteristics of the precipitating phase have been calculated based on invariant line theory. It is revealed that in the γ-TiAl(Nb)/γ₁-Ti₄Nb₃Al₉ couples, both the morphological and crystallographical characteristics of the precipitate γ₁-Ti₄Nb₃Al₉ could be predicted by the three-dimensional phase transformation invariant line model. The needle direction of [001] at the early stage for coherent precipitate γ₁-Ti₄Nb₃Al₉ and [111] for equilibrium phase γ₁-Ti₄Nb₃Al₉ have both been explained well. The characterization of morphology and crystallography of the precipitate reaction in γ-TiAl/γ₁-Ti₄Nb₃Al₉ system sustain the postulate that precipitates are bounded by unrotated planes (eigenplanes) when three real eigenvalues exist.