Using geotextile bag dehydrated soil to construct dikes for land reclamation to substitute conventional straw bags is an urgent need in Tianjin New Harbor, China. This paper introduces the method to build a dike for h...Using geotextile bag dehydrated soil to construct dikes for land reclamation to substitute conventional straw bags is an urgent need in Tianjin New Harbor, China. This paper introduces the method to build a dike for hydraulic filling. The soil for filling the geotextile bags was tested in wave trench; the stress developed during construction was calculated by establishing a numerical model and compared with the tensile strength of the geotextile; the stability and settlement of the dike were estimated by performing centrifuge tests. Through this study, the following information was obtained: 1) The cohesionless silt with plasticity index less than 10 is suitable for filling the geotextile bags. The geotextile bag dehydrated soil consolidated very quickly even under the action of wave force. 2) A numerical model was devised to find the limit injection height and to calculate the tensile stress developed in the geotextile bags when they were piled up to form the dike. The calculated stress was compared with the strength of the geotextile, showing that the design is reasonably safe. 3) Centrifuge test results show that the designed dike will be stable and the settlement of dike will be less than the design requirement.展开更多
目的为腹壁撤退反射实验优选出恰当的制备气囊的材料。方法分别通过数显游标卡尺及X光图像对不同气囊在不同压力值下的直径进行测量;并采用3分疼痛阈值作为判断标准,测试不同气囊对大鼠造成明显内脏疼痛时所对应的压力值。结果圆形乳胶...目的为腹壁撤退反射实验优选出恰当的制备气囊的材料。方法分别通过数显游标卡尺及X光图像对不同气囊在不同压力值下的直径进行测量;并采用3分疼痛阈值作为判断标准,测试不同气囊对大鼠造成明显内脏疼痛时所对应的压力值。结果圆形乳胶气球的直径随压力值增加变化均匀和缓,并且可以满足实验中常用的压力范围(20~80 mm Hg),其对大鼠造成内脏疼痛的阈值在伤害性刺激值附近,不会对大鼠肠道造成不可逆的损伤。结论腹壁撤退反射实验中使用圆形乳胶气球制备气囊较为理想。展开更多
文摘Using geotextile bag dehydrated soil to construct dikes for land reclamation to substitute conventional straw bags is an urgent need in Tianjin New Harbor, China. This paper introduces the method to build a dike for hydraulic filling. The soil for filling the geotextile bags was tested in wave trench; the stress developed during construction was calculated by establishing a numerical model and compared with the tensile strength of the geotextile; the stability and settlement of the dike were estimated by performing centrifuge tests. Through this study, the following information was obtained: 1) The cohesionless silt with plasticity index less than 10 is suitable for filling the geotextile bags. The geotextile bag dehydrated soil consolidated very quickly even under the action of wave force. 2) A numerical model was devised to find the limit injection height and to calculate the tensile stress developed in the geotextile bags when they were piled up to form the dike. The calculated stress was compared with the strength of the geotextile, showing that the design is reasonably safe. 3) Centrifuge test results show that the designed dike will be stable and the settlement of dike will be less than the design requirement.
文摘目的为腹壁撤退反射实验优选出恰当的制备气囊的材料。方法分别通过数显游标卡尺及X光图像对不同气囊在不同压力值下的直径进行测量;并采用3分疼痛阈值作为判断标准,测试不同气囊对大鼠造成明显内脏疼痛时所对应的压力值。结果圆形乳胶气球的直径随压力值增加变化均匀和缓,并且可以满足实验中常用的压力范围(20~80 mm Hg),其对大鼠造成内脏疼痛的阈值在伤害性刺激值附近,不会对大鼠肠道造成不可逆的损伤。结论腹壁撤退反射实验中使用圆形乳胶气球制备气囊较为理想。
