ASCE SEI 32-01(R2025) PDF下载

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ASCE SEI 32-01(R2025) pdf download
Design and Construction of Frost-Protected Shallow Foundations
霜保护浅基础的设计与施工 PDF下载

该标准由 ASCE 结构工程研究所(SEI)编制,2025 年为最新再确认版,适用于季节性冻土区的浅基础抗冻设计。核心内容包括:

适用范围
针对采暖、半采暖及非采暖建筑的地面板式或架空地板浅基础,提供不依赖传统“深到冻深以下”的防冻方案;
不适用于永久冻土区、年平均气温低于 0 °C 或设计冻融指数大于 4 500 °F-days 的极端寒冷地区。
技术原理
通过在基础周边及底板下方布置聚苯乙烯保温层,将建筑冬季散热“蓄积”在基础下方,使地基土温度始终高于 0 °C,从而避免冻胀破坏。
设计方法

按建筑室内最低月均温度划分为“采暖 / 半采暖 / 非采暖”三类;
根据当地 100 年一遇的空气冻融指数 F100 查表确定保温层厚度、埋深及翼板宽度;
给出竖向保温、翼板保温、地面保温的最小热阻 R 值表格,可直接套用。

材料与构造
保温板必须为ASTM C578 标准的 EPS 或 XPS,给出不同密度等级的抗压强度、允许承载力和最小厚度要求;
对保温板拼接、防潮、排水及防鼠咬等施工细节提出控制要点。
优势
与传统“深挖到冻深以下”相比,可减少土方 50 % 以上、缩短工期、降低造价,并提高建筑整体节能性能和基础板热舒适性

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