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<div class="thecontent"><span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">在當下這個對環境要求特別嚴格的時代，</span><span style="line-height:2;font-size:18px;transition:all 0.5s;-webkit-transition:all 0.5s;"><em style="font-style:normal;font-weight:normal;transition:all 0.5s;-webkit-transition:all 0.5s;"><strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong></em></span><span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">憑借著對生態環境的保護作用被廣泛的應用。在<strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong>的選擇上，有這幾種要求：</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 1.對<strong><a href="http://www.sandbad1.com/" target="_blank">土工膜厚度</a></strong>的要求</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(1)保證其有足夠不透水、不透氣性；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(2)有抵抗破壞的能力；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(3)便于焊接，<strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong>要求厚度應根據沉降等原因引起的變形量來計算，但還要考慮施工條件及偶然荷載等因素，通常厚度應不小于0.5mm，而且厚度的不均勻不宜超過10%。</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 2．接縫強度</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">一般說來，接縫強度總較土工膜本身的強度為低，尤其是在現場焊接，焊縫質量更難保證，故在焊接后應切樣檢測，檢測方法有二種，即剪切試驗與剝離試驗，一般要求剪切強度應不低于原材料的80%。</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 3.溝錨深度要求</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">用<strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong>作邊坡襯砌，當其向上延伸到坡頂時，通常的作法是在離坡邊一定距離L處挖淺溝(深dj)，將膜埋入，并以原地土回填夯實，目的是防止<strong><a href="http://www.sandbad1.com/" target="_blank">聚乙烯土工膜</a></strong>錨溝深度計算，坡頂土工膜上有時有覆蓋土，有時不鋪土Z這里要探討的問題是針對具體條件，確定溝埋深度。</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 4.覆蓋土層穩定性</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> <strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong>上有覆蓋土層時，土體由于重力易于下滑，覆蓋土有等厚度與變厚度之分，其穩定性核算易于按極限平衡條件求解。</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 在分析穩定性時可將整個土層分為主動楔和抗力楔，然后按楔體平衡原理核算其安全系數F,具體方法為:</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(1)由已知土料的內摩擦角φ和δ求取不同安全系數Fs時的相應值φ/Fs和δ/Fs；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(2)對主動楔，以土楔重WA、膜面反力FA(與坡面法線呈δ/Fs角)繪制力平衡多邊形(令作用于垂直面mn上的反力EA平行于坡面)，可以得到兩楔界面上的反力EA；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(3)對抗力楔，以其重量WNB來自主動楔的EA和楔底反力FNB(作用方向與楔底法線呈φ/Fs角)，同樣繪平衡力三角形，但發現，為使該三角形封閉，界面反力尚缺△E(△E=ENB-EA)；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(4)針對每一假定的Fs，可按上述步驟求得相應的△E；(5)繪制Fs～△E曲線，則相應于△E=0的Fs即為覆蓋土層的抗滑安全系數。</span></div> <script> window._bd_share_config = { common : { bdText : '<span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">在當下這個對環境要求特別嚴格的時代，</span><span style="line-height:2;font-size:18px;transition:all 0.5s;-webkit-transition:all 0.5s;"><em style="font-style:normal;font-weight:normal;transition:all 0.5s;-webkit-transition:all 0.5s;"><strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong></em></span><span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">憑借著對生態環境的保護作用被廣泛的應用。在<strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong>的選擇上，有這幾種要求：</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 1.對<strong><a href="http://www.sandbad1.com/" target="_blank">土工膜厚度</a></strong>的要求</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(1)保證其有足夠不透水、不透氣性；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(2)有抵抗破壞的能力；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(3)便于焊接，<strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong>要求厚度應根據沉降等原因引起的變形量來計算，但還要考慮施工條件及偶然荷載等因素，通常厚度應不小于0.5mm，而且厚度的不均勻不宜超過10%。</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 2．接縫強度</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">一般說來，接縫強度總較土工膜本身的強度為低，尤其是在現場焊接，焊縫質量更難保證，故在焊接后應切樣檢測，檢測方法有二種，即剪切試驗與剝離試驗，一般要求剪切強度應不低于原材料的80%。</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 3.溝錨深度要求</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">用<strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong>作邊坡襯砌，當其向上延伸到坡頂時，通常的作法是在離坡邊一定距離L處挖淺溝(深dj)，將膜埋入，并以原地土回填夯實，目的是防止<strong><a href="http://www.sandbad1.com/" target="_blank">聚乙烯土工膜</a></strong>錨溝深度計算，坡頂土工膜上有時有覆蓋土，有時不鋪土Z這里要探討的問題是針對具體條件，確定溝埋深度。</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 4.覆蓋土層穩定性</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> <strong><a href="http://www.sandbad1.com/" target="_blank">土工膜</a></strong>上有覆蓋土層時，土體由于重力易于下滑，覆蓋土有等厚度與變厚度之分，其穩定性核算易于按極限平衡條件求解。</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;"> 在分析穩定性時可將整個土層分為主動楔和抗力楔，然后按楔體平衡原理核算其安全系數F,具體方法為:</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(1)由已知土料的內摩擦角φ和δ求取不同安全系數Fs時的相應值φ/Fs和δ/Fs；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(2)對主動楔，以土楔重WA、膜面反力FA(與坡面法線呈δ/Fs角)繪制力平衡多邊形(令作用于垂直面mn上的反力EA平行于坡面)，可以得到兩楔界面上的反力EA；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(3)對抗力楔，以其重量WNB來自主動楔的EA和楔底反力FNB(作用方向與楔底法線呈φ/Fs角)，同樣繪平衡力三角形，但發現，為使該三角形封閉，界面反力尚缺△E(△E=ENB-EA)；</span><br style="text-transform:none;background-color:#ffffff;text-indent:0px;font:16px/25px 微軟雅黑;white-space:normal;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;transition:all 0.5s;-webkit-transition:all 0.5s;" /> <span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline !important;font:16px/2 微軟雅黑;white-space:normal;float:none;letter-spacing:normal;color:#414141;word-spacing:-1px;-webkit-text-stroke-width:0px;">(4)針對每一假定的Fs，可按上述步驟求得相應的△E；(5)繪制Fs～△E曲線，則相應于△E=0的Fs即為覆蓋土層的抗滑安全系數。</span>', bdDesc : '<span style="text-transform:none;background-color:#ffffff;text-indent:0px;display:inline...', bdUrl : 'http://www.dingyajx.com/news_show.php?theid=136', bdPic : '' }, share : [{ "bdSize" : 16 }] } with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?cdnversion='+~(-new Date()/36e5)]; </script> <div class="thepageinfo"> 上一篇：<a href="news_show.php?theid=137">防滲土工膜和土工布對于防汛工作起到的作用</a><br /> 下一篇：<a href="news_show.php?theid=135">土工材料HDPE土工膜焊接措施的注意事項</a><br /> <a href="news_list.php?tag=news&theid=19">返回列表</a><br /> </div> </div> </div> </div> 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