爆破挤淤填石地基沉降模型试验及预测分析

doi:10.3724/1000-6915.jrme.2024.0350

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摘要爆破挤淤法是处理滨海深厚软弱土地基的有效方法之一。为了探明爆破挤淤填石地基爆后沉降演化规律，开展爆破挤淤填石沉降模型试验，采用整式填石替代碎石，减少碎石沉降的随机性造成的测量误差。研究不同填石尺寸及爆破设计参数下填石地基的沉降特性，并开展沉降预测分析。研究结果表明：填石断面越宽或越高，爆后填石沉降越大，爆破挤淤置换处理的淤泥厚度越大，但沉降稳定的时间越长；炸药埋深越大，爆后填石沉降呈减小趋势，存在最佳的炸药埋深。结合国省干线S201(联七线)公路的现场实测结果，将决定系数、预测误差、最终沉降量作为模型有效性检验指标，提出用于预测爆后填石地基沉降的方法，并对比分析现场和试验沉降发挥特性，验证了预测模型的合理性，为相关工程实践提供技术指导。

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	王军1
	2
	3
	冯莹1
	4
	陈晟凯1
	5
	秦伟1
	2
	5
	张金荣1
	倪俊峰1

关键词 ：基础工程, 爆破挤淤法, 填石地基, 沉降分析, 预测方法

Abstract：The explosive replacement method(ERM) is one of the effective methods to treat the deep soft soil in coastal area. The model tests of explosive replacement were carried out to investigate the post-explosion settlement evolution pattern，and a integrated rockfill was used to represent the crushed rock to reduce the measurement error caused by the randomness. The settlement behavior of the rockfill with different rockfill sizes and blasting design parameters was analyzed. Then，the settlement prediction methods were discussed. The research results indicate that the wider or higher the rockfill cross-section，the greater the post-explosion settlement of the rockfill，and the deeper the treated silt depth，but the longer the settlement stabilization delay. The greater the depth of explosive burial，the post-explosion settlement of rockfill tends to decrease. There is an optimal depth of explosive burial. Combining the results of field measurements of a subgrade project of S201 Trunk road of Nation and Province in Ningde，Fujian Province，China，the predicting method of post-explosive settlement of the subgrade was proposed by taking the coefficient of determination，prediction error，and final settlement as the indicators of the method validity assessment based on on-site measurements. The field and experimental settlement results were compared and analyzed to verify the reasonableness of the prediction model. The study can provide technical guidance for relevant engineering practice.

Key words： foundation engineering explosive replacement method rockfill subgrade settlement analysis prediction methods

引用本文:

王军1，2，3，冯莹1，4，陈晟凯1，5，秦伟1，2，5，张金荣1，倪俊峰1. 爆破挤淤填石地基沉降模型试验及预测分析[J]. 岩石力学与工程学报, 2025, 44(1): 185-196.
WANG Jun1，2，3，FENG Ying1，4，CHEN Shengkai1，5，QIN Wei1，2，5，ZHANG Jinrong1，NI Junfeng1. Settlement performance and prediction model of rock-filled subgrade constructed by explosive replacement method. , 2025, 44(1): 185-196.

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https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2024.0350 或 https://rockmech.whrsm.ac.cn/CN/Y2025/V44/I1/185

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