悬链线法计算桩承式加筋路堤的土拱形态

王一楠; 陈梅君

doi:10.11779/CJGE2021S2064

悬链线法计算桩承式加筋路堤的土拱形态 English Version

王一楠^1,,
陈梅君²

1.
中建安装集团有限公司,江苏　南京　210046
2.
苏交科集团股份有限公司,江苏　南京　210017

详细信息

作者简介:
王一楠(1991— ),男,硕士,主要从事建筑工程、基础工程等方面的研究。E-mail: 114831698@zju.edu.cn

中图分类号: TU473
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出版历程
- 收稿日期: 2021-08-15
- 网络出版日期: 2022-12-05
- 刊出日期: 2021-10-31

Forms of soil arch in GRPS embankment by catenary method

WANG Yi-nan^1,,
CHEN Mei-jun²

1.
China Construction Industrial & Energy Engineering Group Co., Ltd., Nanjing 210046, China
2.
Jsti Group, Co., Ltd., Nanjing 210017, China

摘要

摘要: 针对桩承式加筋路堤中的土拱效应问题,构建了悬链线土拱计算模型。采用平面土拱及拱下空洞假设,推导了悬链线土拱的方程表达式,给出了计算模型下土拱高度及形态的求解方法。采用该方法计算所得土拱高度、土拱形态及桩顶应力与实测结果吻合较好。路基填料内摩擦角增大时,土拱高度由0.36倍增大至0.72倍桩间净距。宽距修正系数从0.3增大至1时,土拱高度迅速由0.6倍增大至2.4倍桩间净距。不同的桩（帽）宽与桩间净距组合是引起不同学者所得土拱高度差异的内在原因。
- 桩承式加筋路堤 /
- 土拱效应 /
- 悬链线模型 /
- 土拱高度 /
- 土拱形态
Abstract: The model for calculating catenary soil arch is established aimed at solving the problem of soil arch effect in GRPS embankment. The relevant equation is derived based on the hypothesis of plain strain and real cavity below the arch and solved to obtain the height and shape of soil arch. Several test results are compared in height and shape of soil arch and soil stress of pile top. The calculated results are in good agreement with the measured ones. The ratio of the soil arch height to the net distance between the piles increases from 0.36 to 0.72 when the friction angle of subgrade fill magnifies. The correction factor of width and space increasing from 0.3 to 1 will cause the sharp acceleration of soil arch height from 0.6 to 2.4. The difference of width and space combinations is the internal reason that researchers obtaine different soil arch heights.
- GRPS embankment /
- soil arch effect /
- catenary model /
- soil arch height /
- soil arch form

HTML全文

图 1 桩承式加筋路堤中的土拱

Figure 1. Soil arch in GRPS embankment

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图 2 悬链线土拱形态计算模型

Figure 2. Model for catenary soil arch

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图 3 土拱悬链线与实测对比

Figure 3. Soil arch catenary and test results

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图 4 不同的填料内摩擦角对应的土拱高度

Figure 4. Soil arch heights with different internal frictional angels

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图 5 不同的桩宽度与桩间距的组合对应的土拱高度

Figure 5. Soil arch heights with different correction factors

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表 1 悬链线土拱模型计算结果数据及对比

Table 1 Soil arch catenary and test results

n	k	m	$f_{计算}$ /m	$f_{实测}$ /m	$σ_{p 计算}$ /kPa	$σ_{p 实测}$ /kPa
0.76	0.95	1.49	1.48	1.60	208.9	238.4

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