- 摘 要
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陳國杰 付贛清
(廣東工業(yè)大學(xué) 廣州 510500)[提要] 通過對軟土地基樁土擠壓變形的分析，導(dǎo)出樁土共同作用的樁壓縮變形公式，式中的參數(shù)由軟土打入單樁試驗Q-s曲線確定。該公式能明確描述樁的三個工作階段，同時得出了樁土彈性工作階段的樁彈簧剛度k的理論公式；用于樁筏基礎(chǔ)設(shè)計，可適當(dāng)選擇樁長，充分考慮地基土承載力，從而獲得較好的經(jīng)濟效益。
[關(guān)鍵詞] 樁筏基礎(chǔ) 樁周土 附著層 彈簧剛度The extruding deformation between pile and soil in soft soil base is analyzed. The formula of the compression deformation of pile in mutual action with soil is deduced. The parameters in the formula are determined according to the Q-s testing curve of single pile which is driven into soft soil. The formula may clearly describe the three working stages of the pile. Moreover, the theoretical expression of elastic rigidity k of pile is obtained in elastic stage and it may be used to give reference for designers. When the calculated elastic rigidity k is used in designing pile-raft foundation, the load-bearing capacity should be considered fully and the length of the pile is chosen properly. In this way, the better economic benefit may be realized.
Keywords: pile raft-foundation; soil around pile; adhesive layer; spring rigidity
