排孔節距 的英文怎麼說
中文拼音 [bèikǒngjiéjù]
排孔節距
英文
pitch of holes in pattern-
The distance of the single - row curtain grout hole is between 1. 4 to 1. 8 meter, and 2. 0 meter is suitable for the double - row curtain ; the grouting pressure generally is 1. 0 to 1. 5 mpa at the first three grout compartment, then grouting pressure of under the fourth control in 4 to 5 mpa ; for mast grout compartments, a water - cement ratio of 2 or 1 may used in the first grouting
鉆孔密度也由原來的0 . slm / mz降至o . 64n擴mz ，節約工程投資447 . 35萬元。 6 、單排帷幕的孔距在1 . 4一1 . 8m之間，雙排帷幕的孔距以zm為宜;灌漿壓力在地表以下前三段一般為1一1 . smpa ，第四段以下按4一smpa控制;對大部分孔段而言，開灌水灰比可定為2或1 。
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