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爆扩短桩基础是目前国内采用的一种新型基础,与以往的独立基础、条形基础相比,它具有土方量小,工期短,造价低,用工省等优点,特别是用在填土地区效果尤为显著。由于这种新型基础是国内近年来发展起来的,还缺乏大量的实践经验,在设计的计算上、理论上均不够完善。为此,我们做了爆扩短桩的静荷载和成型试验,所得结果均甚良好。茲将我们的粗浅认识介绍于后。一、爆扩短桩基础的试验 (一) 爆扩短桩静荷载试验结果与评价为了能较准确的决定爆扩短桩基础的承载能力,我们做了三个不同直径(大头)的抗压试验,两个抗拔及一个水平推力的试验。 1.试桩的埋置深度及地质条件如图1
Expansion short pile foundation is currently used in a new type of foundation, compared with the previous independent foundation, strip foundation, it has a small amount of earthwork, short construction period, low cost, labor-saving advantages, especially in the fill Regional effect is particularly significant. Since this new type of foundation was developed in recent years in China, it lacks a lot of practical experience and is not perfect in theory and design. For this reason, we did the static load and the forming test of the expanded short piles, and the results are very good. We will introduce our superficial understanding in the future. First, the expansion of short pile foundation test (a) Expanded short pile static load test results and evaluation In order to more accurately determine the expansion of short pile foundation carrying capacity, we made three different diameters (bulk) of the compression Tests, two pull-ups and one horizontal thrust test. 1. The embedment depth and geological conditions of the test pile are shown in Fig.1