首页|不同地面附加荷载作用下桩加支撑基坑支护特性研究

不同地面附加荷载作用下桩加支撑基坑支护特性研究

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为研究不同地面附加荷载作用下对桩加内支撑基坑支护结构的影响,以南京某工程为例,采用增量法结合弹性地基梁法的计算模型,分析了在各种附加荷载作用情况下,支撑轴力、支护桩位移和地面沉降的变化情况.结果表明:支撑轴力,支护桩最大位移和坑边地面最大沉降均与附加荷载大小呈正相关变化.附加荷载对基坑支护结构的影响存在有效影响点,反之对基坑支护结构不再产生影响.附加荷载的距离和深度对第一道支撑轴力的主要影响在1.0H之内(H-基坑挖深);附加荷载的距离和深度对第二道支撑轴力和桩身最大水平位移的主要影响在1.5H之内;附加荷载作用宽度对支护结构的主要影响在1.0H之内,最大地面沉降的有效影响点随着附加荷载的增大逐渐外移.
Research on the Characteristics of Pile-supported Foundation Support Under Different Additional Ground Loads
In order to study the influence of different additional ground loads on the pile plus in-ternal support pit support structure,taking a project in Nanjing as an example,the calculation model of incremental method combined with elastic foundation beam method was used to analyze the changes of support axial force,support pile displacement and ground settlement under various additional loads.The results show that the support axial force,the maximum displacement of the supporting pile and the maximum settlement of the ground surface at the edge of the pit are positively correlated with the mag-nitude of the additional loads.There is an effective influence point of the additional load on the pit sup-port structure,and vice versa,there is no influence on the pit support structure.The main influence of the additional load on the first support axial force of the pit support structure is within 1.OH(H-exca-vation depth of the pit).The main influence of the additional load on the second support axial force of the pit support structure and the maximum horizontal displacement of the pile body is within 1.5H.The main impact of the width of the additional load on the support structure is within 1.0H,and the effec-tive point of maximum ground settlement gradually moves outward with the increase of the additional load.

deep foundation pitground loadrow of pilesinternal supporthorizontal displace-ment

汪敏营、赵升峰、邬喜春、李明东

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东华理工大学,江西南昌 344000

中建材岩土工程江苏有限公司,江苏南京 211135

深基坑 地面附加荷载 排桩 内支撑 水平位移

国家自然科学基金项目国家自然科学基金项目江西省重点研发计划

518690015216804320202BBG73037

2024

佳木斯大学学报(自然科学版)
佳木斯大学

佳木斯大学学报(自然科学版)

影响因子:0.159
ISSN:1008-1402
年,卷(期):2024.42(2)
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