重力式擋土牆混凝土牆抗壓強度該用多少? - 土木
By Candice
at 2014-02-12T18:36
at 2014-02-12T18:36
Table of Contents
請教各位前輩
一般在設計重力式擋土牆時 混凝土的抗壓強度都會設計多少呢?
140kgf/cm^2 ？ 還是210kgf/cm^2 ？
一般重力式擋土牆考量的是 土壤承載力 抗傾倒 抗滑動
特殊情況才會考慮混凝土剪力強度
所以一般情形應該無關混凝土的強度
故小弟的課室主管看法是要求應該採用140kgf/cm^2 以避免廠商偷工減料
顧問公司的立場是210kgf/cm^2的耐久性較佳 所以建議用210kgf/cm^2
我的立場是 考量力學問題 用140kgf/cm^2就夠了
但以前在工地上班都被灌輸140kgf/cm^2是很差很差的混凝土(打底用 甚至稱劣質混凝土)
210跟140差不到多少錢 覺得應該多花一點錢來選擇耐久性較佳才對
畢竟混凝土廢棄物以後會是個大問題
心裡實在是很矛盾 希望有前輩能提供意見與解惑
感激不盡
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