- 摘 要
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李 霆 李俊民
（中南建筑設(shè)計院 武漢 430071）[提要] 在9m×18m柱網(wǎng)的預(yù)應(yīng)力筏基中，為解決18m跨方向的基礎(chǔ)構(gòu)件設(shè)計問題，采用了帶端斜桿的空腹桁架，并在桁架中采用了開口向下的大轉(zhuǎn)角預(yù)應(yīng)力折線束以平衡向上的地基反力。對地基反力、沉降以及基礎(chǔ)桁架應(yīng)力、變形進行了實測，并對實測結(jié)果進行了分析，另外還介紹了預(yù)應(yīng)力基礎(chǔ)梁的設(shè)計。
[關(guān)鍵詞] 筏基 預(yù)應(yīng)力 空腹桁架 基礎(chǔ)梁In the prestressed raft foundation with 9m×18m column grid, open-web trusses with diagonal members in the end are adopted in the design of the 18m-span foundation beams, and folded prestressed strands are set in the trusses to balance the subgrade reactions. The analysis of the test of subgrade reacions,settlement,stresses and strains in the foundation trusses is presented, and the design of prestressed foundation beams is also introduced.
Keywords: raft foundation; prestress; vierended truss; foundation beam
