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padding: 0px; color: rgb(102, 102, 102); font-size: 14px; text-indent: 28px; white-space: normal; background-color: rgb(255, 255, 255); font-family: "font-size:14px;background-color:#FFFFFF;";"><img src="/static/upload/image/20210930/1632986644180731.jpg" title="1632986644180731.jpg" alt="呼倫貝爾河道治理工程案例.jpg"/></p><p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-size: 14px; text-indent: 28px; white-space: normal; background-color: rgb(255, 255, 255); font-family: "font-size:14px;background-color:#FFFFFF;";">復合土工膜在我國發展迅速，應用廣泛。復合土工膜是一種施工速度快、防水效果好、投資成本低的防滲材料，特別適用于蓄水深度較小的丘陵水庫、平原水庫和老壩的防滲。</p><div style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-size: 14px; text-indent: 28px; white-space: normal; background-color: rgb(255, 255, 255); font-family: "font-size:14px;background-color:#FFFFFF;";">曲線交會法是復合土工膜厚度的計算方法，可用于計算低水頭土石壩壩面的土工膜厚度、水庫池板上鋪設的土工膜厚度和用土工膜修復的混凝土建筑物的土工膜厚度。對于中高水頭的土石壩，鋪設復合土工膜后，壩體會發生較大變形，應采用基于應力應變計算的有限元應力應變曲線法。該方法可應用于各種條件下復合土工膜厚度的設計。</div><div style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-size: 14px; text-indent: 28px; white-space: normal; background-color: rgb(255, 255, 255); font-family: "font-size:14px;background-color:#FFFFFF;";">復合土工膜中的膜起到防滲作用，兩側土工布起到拉伸和保護作用。土工織物的厚度(密度)和材料對應力和應變有很大的影響。因此，在選擇材料時，復合土工膜除了要有較高的極限抗拉能力外，還要求有理想的應力-應變曲線。</div><div style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-size: 14px; text-indent: 28px; white-space: normal; background-color: rgb(255, 255, 255); font-family: "font-size:14px;background-color:#FFFFFF;";">壩基應力應變與壩料的施工順序和變形特性有關。如果復合土工膜是在大壩填筑完成后鋪設的，則只計算蓄水引起的應變值；如果壩料蠕變變形較大，應考慮蠕變引起的應變值。</div><div style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-size: 14px; text-indent: 28px; white-space: normal; background-color: rgb(255, 255, 255); font-family: "font-size:14px;background-color:#FFFFFF;";">考慮施工工藝和安全裕度，采用有限元應力應變曲線法，即不考慮復合土工膜剛度的影響。當瀝青混凝土面板堆石壩的剛度遠大于復合土工膜時，這是可行的。但當砂礫材料的剛度不是很高時，忽略復合土工膜剛度的影響會對計算結果產生一定的影響，影響程度既與復合土工膜的真實模擬模型有關，也與復合土工膜的鋪設松弛有關。</div><p><br/></p> </div> </div> <div class="context clearfix" > <p class="prevNews bot_left"><a href="/company/7.html">復合土工布覆蓋層穩定性要求</a></p> <p class="NextNews bot_right"><a href="/company/218.html">HDPE土工膜在垃圾填埋場的主要用途和應用</a></p> </div> </div> </div> <div class="InpageSidebar01"> <div class="top"><h2><a href="/article/" title="快速導航">快速導航</a></h2></div> <div class="classify"> <div class='box'> <i></i> <dl class='clearfix'><dt><a href="/company/">公司動態</a></dt>  </dl> </div> <div class='box'> <i></i> <dl class='clearfix'><dt><a href="/industry/">行業動態</a></dt>  </dl> </div> </div>  <div class="sidebarLinkUs"> <h3>聯系我們</h3> <p>聯系人：楊經理</p> <p>咨詢熱線：134-0534-0866</p> <p>地址：德州市陵縣開發區扶風街北首</p> </div> <script type="text/javascript"> productSelectCurrentPosition(""); 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