As a new science and technology, VR technology occupies a pivotal position in social development and progress. It is an indispensable link in the current college teaching field. This article elaborates on the connotation and characteristics of VR technology, analyzes and discusses the necessity of VR technology in building environment and energy application engineering major education, and VR technology application in the major.

It is of positive significance for civil engineering major to develop engineering design practice competition with major courses to improve teaching quality and train students' vocational skills. The engineering design practice competition can stimulate the enthusiasm and motivation of college students, and enable them to have direct contact with design engineers and real practical engineering cases from the front line of engineering through participate the competition, so as to improve students' professional quality and drawing design skill.

Engineering geology is an important compulsory professional basis course for the urban underground space engineering. Its teaching hours is a few but rich in content. This course pays equal attention to theory and practice, whose teaching is difficult and endowed with challenging. In order to adapt to the deep, large and especial construction for urban underground space engineering, we must reform the practice and teaching system of engineering geology. The reformed course is closely combining with the construction practice of underground engineering and reflecting the latest academic achievements. We strengthen the practice and open teaching, focus on training students’ innovation ability and innovative thinking in the teaching process.

本文分析了安卓智能手机基于PPP技术的BDS/GPS组合定位的精度和可靠性,详细评估了在动态测试和静态测试下智能手机的PPP定位性能.结果表明,单GPS系统动态与静态测试定位精度E、N方向分别为2.14 m、2.13 m、0.72 m、1.80 m,组合系统在动态与静态测试定位精度E、N方向分别为1.57 m、1.20 m、0.51 m、1.22 m,组合系统定位精度高于单GPS系统.

The continuous development of Internet and big database accelerate the data infiltration of constructions in various aspects. Three-dimensional Slope Information System which is based on web has auxiliary decisive significance on both planning slope engineering and constructions. Based on the two modules which are three-dimensional visualization and image processing in digital video surveillance, a slope information system is developed. The main conclusions are shown as follows: Based on UAV photogrammetry technology and the application of both BIM and GIS, three-dimensional visualization and its application can be realized economically. Based on advanced development of PFC3D, digital elevation model MySQL database and BP neural network, the rapid modeling and analysis of complex slope's numerical simulation are realized. Based on video image processing technology, the interaction between landslide movement and three-dimensional visualization are realized.

为精确确定安卓用户手机终端的位置,本文基于安卓智能手机采集的静态和动态全球导航卫星系统原始观测数据,利用RTK技术分别进行不同系统组合下的定位解算,分析其定位精度与稳定性,并与专业接收机的结果进行比较.实验结果表明:安卓手机终端在北斗卫星导航系统下各方向的定位精度可达到分米级.通过对比安卓智能手机和专业接收机在不同系统(全球卫星定位系统/北斗卫星导航系统/全球卫星定位系统+北斗卫星导航系统)组合下的定位精度,相比较于单系统定位,双系统(全球卫星定位系统+北斗卫星导航系统)的组合定位可以有效地提高定位的精度与稳定性.

CFG桩复合地基适用于多种基础和多种图纸,在承载力较低的土质地矿,如杂填土、沉积土、淤泥质土等可以利用CFG复合桩改善土体承载力.它既可以提高承载力,也可以节约工程成本,缩短工期.本文针对通州区某住宅项目的工程地质条件,利用有限差分软件FLAC-3D模拟受力沉降变形,分析多种因素对沉降产生的影响.

The continuous development of Internet and big database accelerate the data infiltration of constructions in various aspects. Three-dimensional Slope Information System which is based on web has auxiliary decisive significance on both planning slope engineering and constructions. According to the real construction projects and the slope information system developed independently, the inversion of rock mass macromechanics parameter to meso-mechanics parameter are discussed.

基于频内(P1-C1)差分码偏差的测码组合解算不依赖电离层的优势,本文基于零基准分离站星综合差分码之和的方法对15个IGS观测站接收机差分码偏差进行解算,分析各测站接收机差分码偏差在1个月内的时变特性.实验数据处理结果表明,除KIR8站、ONS1站外,其余13测站接收机差分码偏差1个月内随时间的变化呈现出较优的稳定性.同时,本文以CODE发布值为参考分析各接收机差分码偏差确定值的精度,GPS接收机差分码偏差精度可达0.009ns、GLONASS接收机差分码偏差精度可达0.015 ns,分析结果表明本文确定接收机(P1-C1)差分码偏差的方法具有较高的精度和可靠性.

Ground source heat pump as a technology of making use of renewable energy has been developing rapidly and has an extensive market demand for its advantages of energy saving, high efficiency and environmental protection. This paper explores the research status and existing problems in ground source heat pump at home and abroad in terms of the main forms, characteristics, advantages and disadvantages, and the new multi-heat sources of hybrid ground source heat pump system. And this paper also states the importance of ground source heat pumps in building energy efficiency and the future development trends.

本文设计实现了一个桥梁施工三维模型信息系统,并以实际桥梁施工改造工程为例,利用该系统进行了工程桥梁三维模型的精确量算、路径浏览、通视分析、信息管理、施工推演等工作,实现桥梁施工方案的三维可视化表达及信息化管理.

With the development of computer network technology, the informationization, network and modernization of the laboratory management become an inevitable trend of development.Combined with the establishment of the network teaching platform of the experimental center for architectural engineering in North China University of Technology,the practice on the development of the laboratory comprehensive information management and the experimental center network teaching is carried out on the basis of the network environment, and the simple software with good selection is developed, realizing the intelligentialization of the laboratory network.

目前我国传统的桥梁工程管理模式大多采用2D矢量图、图片、文字等展示形式,难以清楚地表达其真实感和动态的变化过程.现引入建筑信息模型理念并基于二、三维空间数据,开发三元桥整体置换工程推演系统,实现施工场景的快速搭建、施工设计方案的比选、施工工艺的模拟推演,并成功将该系统运用于三元桥整体置换工程中.主要对系统研发背景、系统优势、系统功能、系统概念结构设计、系统逻辑结构设计、系统数据字典设计以及系统分析量算、标注、动画编辑等功能进行了开发研究.

The seismic safety evaluation relates to the great information and complex types of data.The traditional data management method is backward.In this paper,GIS technology is introduced to the evaluation for the seismic hazard.Using the VB6.0 and SuperMap Objects as tool and SQL Server 2006 as database system,the seismic information and foundation database of the engineering geological conditions of the proposed engineering site are established.This seismic safety evaluation system can analysis and manage the huge data scientifically,and provide various operation parameters and data support for spatial analysis of the seismic safety of the proposed engineering site.

In view of the similarities in the slope evolution between the isotropic compression line of the structured soil and the strain softening curve,a method of applying the dynamic line in modeling the strain softening curve is proposed in modeling the isotropic compression behaviors of structured soil.In the presented model,the normal compression line (NCL) is extended to a dynamic one as a reference line.Making the reference line decrease with the loading and the compression line of the structured soil follow the reference line all the time,the constitutive model describing the structured soil in the isotropic compression is formulated.Through the comparison between the test data and the model simulation results,the presented model is verified in describing the compression behaviors of the structured soil smoothly and continuously.

目前框架桥结构主要是普通的钢筋混凝土框架结构,这种框架结构主要存在自重过大的问题,此问题导致顶进施工过程中土体的破坏和材料的浪费以及顶进施工难度的增加.本文提出用型钢混凝土结构代替框架桥中的普通钢筋混凝土结构,并用有限元软件Midas Civil对普通的钢筋混凝土框架桥和不同含钢率型钢混凝土框架桥进行了有限元的对比分析,对比两者在同等地质和荷载的条件下,所受内力和位移的情况.通过对比分析发现型钢混凝土框架桥结构是可行的,并得出了型钢混凝土框架桥含钢率的合理范围为5％～6％.

浅埋暗挖下穿施工引发的变形研究，对施工以及线上建筑物和构筑物的安全具有重要的意义。基于石家庄地铁一号线张~西区间双线隧道下穿铁路的实测资料，得出了双线隧道开挖监测点纵向变形呈“双S”型，在双线隧道开挖及列车振动荷载共同影响下，对隧道开挖过程中上下台阶的影响作用及先后开挖对隧道影响作用进行了研究。

城市地下管线是保障城市运行的重要基础设施和“生命线”,近年来,由地下管网问题导致管线爆裂等事故呈高发态势.确保埋地管道的安全使用,对保障城市安全具有重要意义.对于地表爆炸荷载作用下埋地管道应力如何计算、应力分布有何特点及其是否安全,是一个值得研究的问题.基于模拟的爆炸荷载,在考虑不同管道埋深、爆心距和炸药当量的情况下,利用FLAC3D软件模拟获得了爆炸荷载作用下埋地管道的响应,并对管道的变形、应力及应力分布特点进行了分析.通过最大Von Mises应力失效准则对管道进行安全性评价,得出了一定范围内背爆面的管壁更易遭到受拉破坏,且爆心距大于15 m的埋地管道基本不受影响的结论.研究成果对于埋地管道防灾减灾具有一定的意义.

基于突变级数理论,研究构建了人工边坡失稳评价突变级数指标体系,划分为17个评价指标.实践证明,所构建的指标体系在人工边坡稳定性评价方面取得良好效果.

复杂场地条件下,安全、快速、经济的进行盾构机吊装是目前盾构隧道施工中关键问题之一.本文以地铁6号线4标慈寿寺站盾构机解体吊装为例,探讨了盾构机井下平移吊装施工方法,为今后类似工程提供了参考.