解读塑料薄膜的抗拉强度和抗穿刺性能.docVIP

解读塑料薄膜的抗拉强度和抗穿刺性能 Interpretation of the plastic film tensile strength and puncture resistance 在复合土工膜两侧压力水头到达一定值后，复合土工膜就会决裂。逐级增加试样两侧水力压养，并坚持一定时间，当渗流量急速增加，表示试样遭到毁坏，也就取得了试样的耐静水压值。 In a composite geomembrane on both sides of the pressure head reaches a certain value, the composite geomembrane will break. Increase sample on hydraulic pressure step by step, and insist on a certain time, when seepage flow increase rapidly, said the samples have been damaged, also made a hydrostatic pressure resistance value of the sample. 坚持复合土工膜的上述压力至少2h，察看渗流管水位变化状况，复合土工膜水位根本稳定（渗流量为0），则以0.1-0.2mpa，为级差逐级增加压力，每级均坚持2h，直至呈现渗流量快速增加现象，标明试样已呈现决裂，此前一级压力即作为耐静水压（mp阿)。 Adhere to the composite geomembrane pressure above at least 2 h, examined the seepage pipe water level changes, composite geomembrane was stable water level, seepage flow is 0), with 0.1 0.2 mpa, to increase pressure differential step by step, insist on 2 h for each class, until the present phenomenon of seepage flow increase rapidly, indicate the sample has break, after pressure level that is as resistant to hydrostatic pressure (mp). 复合土工膜规格的选择与下垫层平整度、资料允许拉应力、资料弹性模量、铺设范围内的最大水头及掩盖层最大粒径等有关，其厚度设计除思索主要由水压力请求的强度外，还需思索暴露、埋压、气候、运用寿命等应用条件，并按国度现行有关规范的规则肯定设计厚度及实践厚度。 Composite geomembrane specification selection and pad flatness, data allows the tensile stress, elastic modulus, laid within the scope of the particle size distribution of the maximum water head and cover layer and so on, its thickness design in addition to consider mainly by the strength of the water pressure request, still need to think exposure, bury and application conditions such as climate, use life, and with related existing state specifications in accordance with the rules must be design thickness and depth of practice. 施工留意事项 Pay attention to matters of construction 运用须采用埋入式：掩盖厚度不宜小于30cm。 Using the embedded type should be used in: cover thickness should not less than 30 cm. 复合土工膜普遍应用于水库防渗工程 Compound geomembrane is widely applied in the reservoir seepage control engi