泉州市城东片区经济适用房工程

工程名称:泉州市城东片区经济适用房工程建设地点:泉州市丰泽区城东片区工程结构:框剪本工程为地上3栋层数分别为26、26、29层,其中一二层为裙楼,地下共1层的商住楼。项目为RC结构的商住建筑物地下室为一体,1#、2#、3#楼均为塔楼,其中地下一层为车库,一、二层裙楼为商店,三层以上为商品房。     

稻壳灰-废旧砖再生透水混凝土的配合比研究

为探究稻壳灰-废旧砖再生透水混凝土的配合比,采用4因素3水平正交试验,探究水灰比、目标孔隙率、废旧砖骨料取代率、稻壳灰掺量对透水混凝土的强度、透水性、抗冻性的影响。结果表明：水灰比为0.3、目标孔隙率为10%、废旧砖骨料取代率为40%、稻壳灰掺量为6%时,稻壳灰-废旧砖再生透水混凝土的性能更优,其抗压强度为11.28 MPa、劈裂抗拉强度为1.99 MPa、透水系数为0.56 cm/s、孔隙率为37.5%、50次冻融循环后抗压强度为3.74 MPa。     

中国五矿响螺湾商务大厦综合体方案设计

响螺湾地区位于塘沽区海河南岸,与海河外滩公园隔河相望。根据塘沽区城市的规划,响螺湾地区以商务、办公、旅游为功能定位,并以此为目标,构建形象突出、环境优美、使用方便并具吸引力的城市特色功能区。五矿置业公司响螺湾项目位于商务区A-06和A-08地块,为集写字楼、公寓、商业为一体的高档功能综合体。1设计构思该项目占地面积为2.08公顷,总建筑面积为18.27万m~2,其中地上建筑面积为14.47万m~2,地下面积为3 65万m~2。项目     

火焰原子吸收光谱法测定高锑烟尘中的银、铅、镉

建立了火焰原子吸收光谱法测定高锑烟尘中的银、铅、镉的分析方法。试样经王水、高氯酸溶解后,利用四价锑的溴化物沸点较低的性质,将锑挥发除去,以消除基体锑对测定的干扰,在盐酸-高氯酸-硫脲介质中实现了银、铅、镉的连续测定。方法检出限:Ag为0.003 7μg/mL,Pb为0.019 8μg/mL,Cd为0.001 6μg/mL。相对标准偏差(RSD,n=11):Ag为0.92%¹.04%,Pb为1.29%1.04%,Pb为1.29%².21%,Cd为1.99%2.21%,Cd为1.99%².22%。加标回收率:Ag为99.30%2.22%。加标回收率:Ag为99.30%¹01.8%,Pb为98.60%101.8%,Pb为98.60%¹02.5%,Cd为98.40%102.5%,Cd为98.40%¹04.0%。方法准确、可靠、简便、快速,完全适用于高锑烟尘中银、铅、镉的测定。     

MRI多参数分析在乳腺良、恶性病变诊断中的应用

目的探讨MRI多参数分析在乳腺良、恶性病变诊断中的应用。方法对44例乳腺疾病患者均行双乳T1WI、T2WI压脂扫描以及弥散加权成像（DWI）扫描。采用乳腺容积成像序列进行动态增强扫描。使用Functool软件进行表观弥散系数（ADC值）的测量、建立时间-信号强度增强曲线及计算出最大信号增加斜率（MSI）。结果 44例患者中,恶性25例,良性19例。其分叶及毛刺的敏感性、特异性、阳性预测值、阴性预测值以及准确度为62.5%～80.0%。时间-信号强度增强曲线显示：Ⅰ型曲线（平台型）17例,均为良性。Ⅲ型曲线（速升速降型）18例,均为恶性;其阳性预测值为100.0%,准确度为100.0%。Ⅱ型曲线（平台型或速升速降型）9例,其中良性2例,恶性7例。ADC值的敏感性为88.0%、特异性为84.2%、阳性预测值为88.0%、阴性预测值为84.2%、准确度为88.0%,各项指标均较高。MSI的敏感性为100.0%、特异性为100.0%、阳性预测值为100.0%、阴性预测值为90.5%、准确度为100.0%。结论乳腺疾病的MRI检查主要以形态学及动态增强后强化程度与方式评价为基础。时间-信号增强曲线、DWI及ADC值等对乳腺良、恶性病变的诊断有重要价值。     

活性污泥微生物蛋白质提取效果的影响因素研究

以活性污泥为原料,采用单因素试验法,分别对影响活性污泥中蛋白质提取效率的7个因素进行了研究。结果表明:当Na Cl溶液浓度为2%、抽提p H值为8.5、抽提温度为25℃、抽提时间为2 h、沉淀温度为5℃、沉淀p H值为3、样品∶抽提液=1∶20、沉淀时间为16 h时,蛋白质的提取率最高,为17%左右。     

汤臣海景花园超高层住宅结构设计

1工程概况汤臣海景花园位于上海浦东新区陆家嘴中心区内,基地总用地面积为20111m2。基地由滨江大道的富城路、花园石桥路、银城西路及银城南路围合而成。本基地周边大多为高层、超高层办公楼及高档酒店,南面为黄浦江,外部环境十分优越。汤臣海景花园为高档住宅小区,由A、B、B1、C4幢超高层建筑及1个地下2层、可停400辆左右轿车的大型停车库组成,总建筑面积为130000m2左右。其中A和C幢楼为地上40层住宅,1层1户,总高度为138.9m;B和B1幢楼为地上44层住宅,1层2户,总高度为152.1m。该小区建成后,区内住户能够最大限度地欣赏到浦西外滩的美景,…     

深圳市建工集团股份有限公司

深圳市建工集团股份有限公司是以建筑工程总承包、房地产开发为主业的大型企业集团。注册资本3.034亿元,总资产40亿元。深圳建工集团坚持"以人为本、诚信立业、和谐发展、实现共赢"的价值观,秉承"为股东创造回报、为客户创造价值、为员工创造机会、为社会创造效益"的宗旨,科学管理、稳健     

科研经费有效管理体系建设探析

近年来国家对高校科研经费的投入大幅度增加,为高校科学研究工作的顺利开展提供了经费保障,但高校科研经费管理制度还不够完善,需要建立科学、有效的管理体系和运行机制。基于公共政策理论、预算理论、协同理论三理论的启示,高校科研经费管理体系要以制度建设为根本、以预算管理为核心、以信息共享为平台、以学习教育为引领、以监督问责为抓手,学院、科研、财务、审计、监察等部门协同推进。     

“真境”,别样的课堂风景——《〈伶官传〉序》一课教学与评析

语文课堂的"真境",即指以语言为能源库,以意旨为原动力,以情思为神经元,三者有机融合,臻至和谐、美好、愉悦的课堂生态。它表现为真教、真学、有境三个显著特征,彰显自然、真切、深沉、韵味四个维度。     

塑料排水板处理软基山体填筑施工监测分析

原地表沉降及边桩水平位移速率常作为路基施工中软土地基稳定性监测的控制指标.通过对上海某植物园塑料排水板(PVDs)处理后的软土地基在园林山体填筑过程中的监测数据进行分析,包括原地表沉降、边桩水平位移、边桩竖向位移、孔隙水压力、分层沉降以及深层水平位移,研究适用于园林山体填筑过程中稳定性控制指标及预警值.     

有关住宅小区中水回用的探讨

通过对城镇住宅小区中水回用的调查分析研究,探索出中水回用作为一种新的节水方式应用于住宅小区的新途径,指出设立中水系统供应城市杂用水可缓解城市生活供水紧张,对于缺水城市而言,污水资源化有着特殊意义,从根本上改变了居民小区的用水排水方式。     

盾构近距离穿越原有建（构）筑物的施工措施

上海世博北京西路-华夏西路电力电缆隧道工程是世博站配套工程,区间隧道采用盾构法施工。盾构推进过程中,需近距离穿越运营中的地铁隧道、原水箱涵及南浦大桥桥桩等原有构筑物,且隧道穿越时土层不同。本文针对上述问题,对盾构穿越原有建（构）筑物采取的措施进行了剖析,可供类似工况借鉴。     

Water stability mechanism of silicification grouted loess

Silicification is one of the chemical stabilisation methods used in the treatment of collapsible loess soils. The water stability therein is a key parameter in the silicification of grouted loess. Based on slaking tests, permeability measurement, X-ray diffraction spectra, X-ray energy dispersive spectroscopy, and scanning electron microscopy, the water stability mechanism inherent in the CO₂-silicification grouted loess was investigated. Samples of original, compacted, and CO₂-silicification grouted loess in 30 days curing were tested. To assess the long-term water stability, CO₂-silicification grouted loess samples in 13, 19, and 24 years of curing were analysed. The study showed that the CO₂-silicification grouted loess had good water erosion resistance, no disintegration, and good water stability over time. The water stability of CO₂-silicification grouted loess depended on the strong bond strength of the grains and a low permeability. The complex physicochemical reactions among CO₂, water, alkali earth metal salts, clay minerals, and organic matter in loess produced hydrate calcium (and magnesium) silicate gels, which were mainly coated on the surface of the soil skeleton grains and original cements. A few filled in the trellis pores. The gels coated on the soil skeleton limit the hydrophilicity of clay minerals and organic matter and improve water resistance, and if coated on original cements reinforce bond strength, consequently, the water stability of CO₂-silicification grouted loess was improved.     

许塘水厂虹吸滤池的改造与运行

采用拆除大阻力配水系统的穿孔钢管和支管,去除承托层、垫层和滤料层,引入小阻力配水系统等措施对许塘水厂老式虹吸滤池进行了改造。过滤系统采用高精度滤板及ABS短柄滤头,滤池开孔比为2.5%,整体滤板抬高0.4m,均质滤料层厚度为800mm。通过技术改造,出厂水平均浊度达到0.4NTU,滤池产水量提高近1.5倍,经济技术指标大大提高。     

裂隙岩体渗流应力耦合机制研究

隧洞开挖前,岩体中的地下水与围岩应力处于一种相对平衡状态,由于隧洞的开挖,一方面使地下水排泄有了新的通道,加速了水循环,破坏了原有的补给一运移一排泄系统的平衡;另一方面,造成围岩应力重分布,部分结构面由于增压而闭合,部分岩体卸荷松弛或产生剪切滑移,人为破坏了原有的地下水渗流条件,使得隧洞自身成为地下水向外排泄的地下廊道...     

Revising the existing Performance Indicator system for small water supply utilities in Japan

97.5% of the water utilities in Japan serve less than 50,000 customers, and are called small water utilities. The Performance Indicator system in Japan, used to evaluate the performance of various aspects of the supply system, currently has 137 items, which are too many in number for the small utilities to adopt because of resource and financial constraints. The objective of this study is to, thus, revise the existing PI system to arrive at a reduced, relevant and practical structure that provides enough information to rationally evaluate small water supply systems in Japan. Principal Component Analysis was used to reduce the dimensionality of the original data. The results suggest that only nine components, consisting of 33 items (called 9-cPIS), are sufficient for evaluating the small water utilities. The effectiveness of the 9-cPIS in benchmarking, evaluating business models, and the planning and management of the water utilities has been discussed further.     

Self-watering system for arid area: A method to combat desertification

One of the reasons for the rapid expansion of arid or semiarid areas is that the decline in the ground water level makes it impossible for plants to get enough water. In order to provide water sustainably for plant life, a self-watering system has been developed. This self-watering system, designed to collect and store rainwater, dew and groundwater, reliably provides water to the surface vegetation. The system consists of two parts: one is the original soil and the other is soil which is replaced by finer soils. The results of laboratory model tests and numerical simulations showed that the system continuously raises the ground water to a level higher than the maximum capillary height of sandy ground without the requirement for any extra energy input. The stable operation of the system mainly depends on unsaturated hydraulic conductivity, the soil water retention curve and the shape and the size of the area of replaced soil. Because the original top soil reduces evaporation, soil salinization is minimal. The evaporation rate is negatively and exponentially correlated to the thickness of the covered original soil. Both the T-type system and suspension-type system have been shown to have a larger net capillary storage capacity than the original sandy ground, with a specific value dependent on the soil water retention curve. The rate of water movement in the T-type system is five to six times higher than that in the suspension-type system. The water content of coarser soil near the finer soil is larger than that of homogeneous coarser soil. The numerical simulation results were in good agreement with the model test, and a case study with various potential transpiration rates was conducted to evaluate the dynamic performance of the system.     

Chemical injection application at tunnel service shaft to prevent ground settlement induced by groundwater drainage: A case study

Chemical injections are used in a variety of applications in civil and mining engineering, including ground stabilization, support anchoring, strata sealing, reduction and diversion of groundwater flow and water ingress, and creation of a load-bearing ring during tunneling. Historically, injection application without pressure was first employed by the Romans. Polyurethane injections have been used in coal mines to stabilize roofs and to reduce problems regarding water ingress in shafts and tunnels. This paper focuses on chemical injection, which was employed to prevent ground settlement induced by groundwater drainage from the shaft. As a result of the drainage of 4.5 l/s groundwater from the Shaft 4, which was sunk for service at Guzelyali station of Izmir Metro Project, the groundwater level dropped 4 m from the original level, and ground settlement reached 98 mm, while the inner tunnel vertical convergence was 23 mm. This can be explained with the closure of pore volumes in the overburden. Ground settlement was stopped and groundwater level approached its original level after chemical injection.     

城市雨水景观设施的建设与改造

从水资源的匮乏和恶化出发,分析雨水回收利用的必要性和可行性;提出了以原有的自然水脉为网络进行城市规划以及建设和改造城市雨水景观的理念;利用城市原有的水系进行雨水和生活用水的收集,通过街道绿地中的水道,借助地势,将城市各区域的水汇集到城市低处的公园内进行统一的净化、协调,使城市雨水得以高效率的回收;并以山东即墨新城规划为例,从城市绿地系统规划的角度出发,以居住区、街道、公园等典型区域为例,为整个城市的水回收净化的景观设施设计提供了建议。