论加强环境保护基础设施建设

为进一步加强环境保护基础设施建设,促进我国环境保护事业的更大发展,各级人民政府和环保部门必须研究采用各种切实有效的措施。环保部门应当参与投资决策,确保资金投向基础设施建设;认真调查研究,选好选准基础设施项目,做好项目审批;采取各种措施和政策,加大投资力度;加强对基础设施建设的领导,加强投资监管,加快建设进度。     

CONSTRUCTION WORK FORCE CHARACTERISTICS AND COMMUNITY SERVICE IMPACT ASSESSMENT1

ABSTRACT: Findings of a national survey of the Corps of Engineers construction work force are presented. The purpose of the survey was to obtain information about the construction work force for use in estimating the demand on local community services associated with building Corps projects. Information on numbers of workers and dependents in-migrating to construction sites, the residential location preferences and commuting patterns of this group, and the intentions of this group to remain in local areas after project construction is presented in this paper. An example showing how this information can be used in a community service impact assessment is provided.     

LEAKY ACRES RECHARGE FACILITY: A TEN-YEAR EVALUATION1

From 1971-1980, studies were conducted at Fresno, California, to identify and quantify, where possible, the soil and water chemistry, subsurface geologic, hydrologic, biologic, and operational factors that determine the long term (10-year) effectiveness of basin type artificial ground water recharge through alluvial soils. This paper updates previous findings and refers to publications that describe the geology beneath the basins and regional geology that determine the transmission and storage properties for local ground water management and chemical quality enhancement. High quality irrigation water from the Kings River was used for recharge. Construction and land costs for the present expanded facility 83 ha (205.2 ac) using three parcels of land were $1,457,100. The nine-year annual mean costs for only canal water, maintenance, and operation were $110.42/ha·m ($13.62/ac·ft) based on an average recharge rate of 1338 ha·m/yr (10,848 ac·ft/yr) at 86 percent facility efficiency. The measured end of season recharge rate averaged 14.97 ± 0.24 cm/day. The 10-year mean actual recharge rate based on actual water delivered, total ponded area, and total days of recharge was 12.1 cm/day.     

川主寺至九寨沟旅游公路建设与环境保护

川主寺至九寨沟公路(简称“川九”路)是交通部、四川省重点建设工程。项目所在地海拔高、生态环境脆弱,又是旅游胜地,做到公路建设与环境保护的协调统一是本工程的核心内容。通过分析公路建设环境影响,主要针对施工期提出行之有效的环境保护措施并贯彻于设计和施工中,达到了交通部“安全、舒适、环保、示范”的要求,建设了我国第一条高原区生态公路。     

谈高职院校学风建设的方法及途径

通过对高职院校学生的学风现状分析,指出了其成因,提出了适合高职院校加强学生的学风建设的方法和途径.     

城市河流近自然治理--概念构架与治理设计

河流是城市生态系统的重要组成部分,是城市的自然元素和景观组分,具有提供水生生物生境和水源、调节小气候、美化城市、休闲娱乐等多种生态服务功能.随着城市化进程的飞速发展,城市河流生态系统面临着生物多样性减少、污染加剧等多方面的危害.如何恢复受损的城市河流生态系统已经成为我们的当务之急.对城市河流的生态结构及其在城市中的生态功能进行了简要介绍,讨论了河流生态恢复的近自然方法,并对现有的河流生态恢复存在的问题及发展趋势提出了几点看法.     

Design of unsurfaced roads constructed with large-size shredded rubber tires: a case study

Stockpiles of scrap tires are serious fire hazard, public health hazard, and an environmental burden. The construction of road embankments, using tire shreds as a lightweight fill, can consume large quantities of scrap tires and has certain engineering benefits. All the previous research focused on small size tire shreds (3–6 in. size) in terms of its use in civil engineering applications and determination of the engineering/environmental properties. This research specifically focuses on large size tire shreds (12 in. size) and its direct comparison with the other sizes of the tire shreds to develop mechanistic-empirical practical design model and so that the use of tire shreds in road bases could be used on regular basis with enhanced reliability instead of on an empirical basis. The research also examines the potential environmental implications of the use of shredded rubber tires and the comparison of the short-term results with other long-term monitoring studies.     

扣件式钢管支撑式挑脚手架的安全应用

阐述了扣件式钢管支撑式挑脚手架搭设受力计算、搭设方法和程序及施工方案。说明扣件式钢管支撑式脚手架有可靠的安全性。且构造简单，搭设、拆除方便。可多次周转使用，又节约用料，在高层建筑施工中可广泛应用。     

我国城市周边规划建设用地利用探讨

随着我国城市面积的不断扩大，大量的郊区耕地成为或即将成为城市的建设用地，同时与城市建设相伴相随的建筑渣土的堆放已成为城市的一大问题，本文按照循环经济原则，提出利用规划期内即将建设的城市周边耕地资源建立供应城市建筑的制砖企业，同时利用取土坑填埋建筑渣土，建立城市物质的有效循环，实现城市建筑的循环经济。并对此物质循环方式做了生态经济的分析，也对此物质循环中存在的障碍提出了解决的方法。     

正确认识和实施西部大开发的生态环境建设

生态环境建设是西部大开发中的基本政策,在中央支持下取得了可喜成绩。但在局部地区也存在不符合当地自然条件盲目种树种草现象,最终可能导致生态环境受破坏,影响当地经济的持续发展。同时还存在着忽视了洪水对土地侵蚀的治理,盲目筑坝,破坏胡杨林自然保护区生态环境的现象。