The sulfurous water deposit exploitation in volcanic, swamp, or wetland regions, represents an alternative option for potable water supply in cities and communities around the world. However, before its consumption, i...The sulfurous water deposit exploitation in volcanic, swamp, or wetland regions, represents an alternative option for potable water supply in cities and communities around the world. However, before its consumption, it must be treated by the application of physicochemical or biological methods with the ability to separate high contents in sulfates, hydrogen sulphite and sulphides which have laxative, allergic and toxic properties in humans. Conventional methods require the supply of chemical compounds or the adequate control of different parameters such as pH, temperature, etc., and the constant maintenance within their reactors. For these reasons, the systems could have elevated operating costs and require additional steps to enable the treatment of its separated products and the final disposal of its residual waste generated. In this research, compound parabolic collectors are implemented for the use of solar energy radiation, UV-B type, in Solar Advanced Oxidation Processes in H2O2/O3/UVsolar homogeneous phase. Its application during the pre-treatment of four sulfur water wells from the region of Puebla, Mexico, demonstrated its ability to transform their sulfur compounds in sulfates of easy removal by a later stage of reverse osmosis, in an approximately 15 min treatment time process.展开更多
A two-dimensional(2-D) finite element(FE) model was developed to analyze the deformation and stress of embankment on soft ground due to widening with different treatment techniques.It is found that the embankment wide...A two-dimensional(2-D) finite element(FE) model was developed to analyze the deformation and stress of embankment on soft ground due to widening with different treatment techniques.It is found that the embankment widening induces transverse gradient change due to differential settlements and horizontal outward movements at the shoulder of the existing embankment.Embankment widening also increases the shear stress along the slope of the existing embankment,especially at the foot of slope.The failure potential due to embankment widening may increase with the increase of widening width when the widening width is smaller than 8.5 m,but may decrease with the increase of widening width as the widening width is greater than 8.5 m.The effectiveness of four ground and embankment treatment techniques,including geosynthetic reinforcement,light-weight embankment,deep mixed columns,and separating wall were compared.The results indicate that these treatments reduce the differential settlements and improve the stability.The light-weight embankment has the most effectiveness among four treatments.By using the fly-ash backfill material in widening,the transverse gradient change decreases from 0.5%-1.3% to 0.26%-0.8% and the maximum horizontal displacement decreases from 2.76 cm to 1.44 cm.展开更多
通过以矿渣和电石渣为碱激发原料、硅酸钠为碱激发剂形成的地聚合物(GCG)固化淤泥来实现工业固废以及废弃土的资源化利用.通过无侧限抗压强度(UCS)试验研究了固化剂组分、养护龄期和含水率对GCG固化土强度的影响规律,并通过扫描电镜试验...通过以矿渣和电石渣为碱激发原料、硅酸钠为碱激发剂形成的地聚合物(GCG)固化淤泥来实现工业固废以及废弃土的资源化利用.通过无侧限抗压强度(UCS)试验研究了固化剂组分、养护龄期和含水率对GCG固化土强度的影响规律,并通过扫描电镜试验(SEM)探究了其微观机理.试验结果表明:矿渣与电石渣的最佳配比为6.5∶3.5;当固化剂掺量大于10%时,固化土UCS值大幅提升,最大28 d UCS值为8.86 MPa;当碱激发剂掺量增加时,固化土UCS值先增大后减小,存在最优掺量7.5%;28 d固化土强度在7~14 d时增长速率较大,在其他龄期下增长速率较小;当初始含水率由30%增长至60%时,不同固化剂掺量下的固化土28 d UCS值降低了57.1%~92.5%;固化剂掺入7 d后在固化土体能产生更多的胶结物,使土体结构更加致密.展开更多
在抗震设计中,场地是指具有相似的反应谱特征的工程群体所在地,不仅仅是房屋基础下的一小块地基土。其范围相当于厂区、居民小区和自然村或不小于1.0 km 2的平面面积。结合场地的概念,通过对一些项目地基处理前后场地类别的分析,从地基...在抗震设计中,场地是指具有相似的反应谱特征的工程群体所在地,不仅仅是房屋基础下的一小块地基土。其范围相当于厂区、居民小区和自然村或不小于1.0 km 2的平面面积。结合场地的概念,通过对一些项目地基处理前后场地类别的分析,从地基处理对场地类别及特征周期的影响,提出了通过地基处理实现上部结构减震的方法。展开更多
文摘The sulfurous water deposit exploitation in volcanic, swamp, or wetland regions, represents an alternative option for potable water supply in cities and communities around the world. However, before its consumption, it must be treated by the application of physicochemical or biological methods with the ability to separate high contents in sulfates, hydrogen sulphite and sulphides which have laxative, allergic and toxic properties in humans. Conventional methods require the supply of chemical compounds or the adequate control of different parameters such as pH, temperature, etc., and the constant maintenance within their reactors. For these reasons, the systems could have elevated operating costs and require additional steps to enable the treatment of its separated products and the final disposal of its residual waste generated. In this research, compound parabolic collectors are implemented for the use of solar energy radiation, UV-B type, in Solar Advanced Oxidation Processes in H2O2/O3/UVsolar homogeneous phase. Its application during the pre-treatment of four sulfur water wells from the region of Puebla, Mexico, demonstrated its ability to transform their sulfur compounds in sulfates of easy removal by a later stage of reverse osmosis, in an approximately 15 min treatment time process.
文摘A two-dimensional(2-D) finite element(FE) model was developed to analyze the deformation and stress of embankment on soft ground due to widening with different treatment techniques.It is found that the embankment widening induces transverse gradient change due to differential settlements and horizontal outward movements at the shoulder of the existing embankment.Embankment widening also increases the shear stress along the slope of the existing embankment,especially at the foot of slope.The failure potential due to embankment widening may increase with the increase of widening width when the widening width is smaller than 8.5 m,but may decrease with the increase of widening width as the widening width is greater than 8.5 m.The effectiveness of four ground and embankment treatment techniques,including geosynthetic reinforcement,light-weight embankment,deep mixed columns,and separating wall were compared.The results indicate that these treatments reduce the differential settlements and improve the stability.The light-weight embankment has the most effectiveness among four treatments.By using the fly-ash backfill material in widening,the transverse gradient change decreases from 0.5%-1.3% to 0.26%-0.8% and the maximum horizontal displacement decreases from 2.76 cm to 1.44 cm.
文摘通过以矿渣和电石渣为碱激发原料、硅酸钠为碱激发剂形成的地聚合物(GCG)固化淤泥来实现工业固废以及废弃土的资源化利用.通过无侧限抗压强度(UCS)试验研究了固化剂组分、养护龄期和含水率对GCG固化土强度的影响规律,并通过扫描电镜试验(SEM)探究了其微观机理.试验结果表明:矿渣与电石渣的最佳配比为6.5∶3.5;当固化剂掺量大于10%时,固化土UCS值大幅提升,最大28 d UCS值为8.86 MPa;当碱激发剂掺量增加时,固化土UCS值先增大后减小,存在最优掺量7.5%;28 d固化土强度在7~14 d时增长速率较大,在其他龄期下增长速率较小;当初始含水率由30%增长至60%时,不同固化剂掺量下的固化土28 d UCS值降低了57.1%~92.5%;固化剂掺入7 d后在固化土体能产生更多的胶结物,使土体结构更加致密.
文摘在抗震设计中,场地是指具有相似的反应谱特征的工程群体所在地,不仅仅是房屋基础下的一小块地基土。其范围相当于厂区、居民小区和自然村或不小于1.0 km 2的平面面积。结合场地的概念,通过对一些项目地基处理前后场地类别的分析,从地基处理对场地类别及特征周期的影响,提出了通过地基处理实现上部结构减震的方法。
