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編輯同志: 读了貴刊1963年第10期《倒虹吸管灌溉涵洞設計介紹》一文后,受益很大。但也觉得有些美中不足,現提出自己的一些浅見,以便更好地向邹守簡同志学习。因业务关系,我打算重点談談有关弹性地基的采用問題。 1. 这种涵洞是否要釆用弹性地基梁? 我認为,可以不用。一般設計中,釆用弹性地基梁方案的主要目的是减少上部結构物的不均匀沉降,保証結构物的正常使用。邹文的目的显然也是为避免装配式涵洞产生不均匀沉降而使接头开裂、漏水。这种想法,当然是对的。但问題在于有沒有其他更为經济的方法,同样能保証涵洞的正常使用。就上部結构而言,涵管是預制的,約2.3m一节,用八节涵管装配而成。其接头处若作成刚性的,势必严格地要避免不均匀沉降,則必須正象邹文中那
Editor comrades: read your magazine in 1963 No. 10 “inverted siphon irrigation culvert design introduction,” a text, great benefit. However, I also think there is a flaw in the fly and I now present my own humble opinion in order to better learn from Comrade Zou Shoujian. Due to my business relationship, I intend to focus on the adoption of flexible foundations. 1. Is this kind of culvert used to be a flexible foundation beam? I do not think so. In the general design, the main purpose of adopting the flexible foundation beam scheme is to reduce the uneven settlement of the upper structure and ensure the normal use of the structure. Zou Wen’s purpose is obviously to avoid uneven settlement of assembly culverts and make the joints cracking, leaking. Of course this is right. But the question is whether there are other more economical ways to guarantee the normal use of culverts as well. In terms of the superstructure, the culvert is prefabricated, about 2.3 m in length, assembled with eight culverts. If the joints made of rigid, it is bound to strictly avoid uneven settlement, it must be as Zou Wenzhong that