北京地区CFG桩复合地基沉降计算与实测对比研究

许超; 任君; 杨云轩; 宋杰; 张良

doi:10.20265/j.cnki.issn.1007-2993.2025-0173

北京地区CFG桩复合地基沉降计算与实测对比研究

doi: 10.20265/j.cnki.issn.1007-2993.2025-0173

许超^{1, 2,},
任君^{1, 2},
杨云轩^{1, 2},
宋杰^{1, 2},
张良¹

1.
中兵勘察设计研究院有限公司，北京　100053
2.
北京中兵岩土工程有限公司，北京　100162

详细信息

作者简介:
许　超，男，1988年生，硕士，高级工程师，注册土木工程师（岩土），主要从事岩土工程设计。E-mail：xuchao1122@qq.com

中图分类号: TU470
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- 文章访问数: 55
- HTML全文浏览量: 17
- PDF下载量: 11
- 被引次数: 0
出版历程
- 收稿日期: 2025-04-15
- 修回日期: 2025-07-16
- 录用日期: 2025-08-25
- 网络出版日期: 2026-06-08
- 刊出日期: 2026-06-08

Comparative study on settlement calculation and measurement of CFG pile composite foundation in Beijing

XU Chao^{1, 2
,},
REN Jun^{1, 2},
YANG Yunxuan^{1, 2},
SONG Jie^{1, 2},
ZHANG Liang¹

1.
China Ordnance Industry Survey and Geotechnical Institute Co., Ltd., Beijing 100053, China
2.
Beijing Zhongbing Geotechnical Engineering Co., Ltd., Beijing 100162, China

摘要

摘要: CFG桩复合地基常用于解决天然地基承载力不足或变形较大等问题。关于CFG桩复合地基沉降计算方法及其可靠性一直存在争议，有相当一部分学者和岩土工程师认为沉降计算值比实测值大。为此，搜集整理了北京地区多个典型地层区域CFG桩复合地基项目设计与变形监测资料，研究发现在未考虑回弹再压缩变形的情况下，沉降计算值普遍小于实测值，考虑回弹再压缩变形后沉降计算值接近实测值。结合规范提出了同时计算回弹再压缩和附加应力变形的沉降计算公式，提高了沉降计算精度和效率。研究成果可为CFG桩复合地基设计及沉降带设置提供参考。
- CFG桩 /
- 沉降计算值 /
- 沉降实测值 /
- 回弹再压缩
Abstract: CFG pile composite foundation is commonly used to solve problems such as insufficient bearing capacity or excessive deformation of natural foundations. There have been controversies over the settlement calculation method and its reliability for CFG pile composite foundations. A considerable number of scholars and geotechnical engineers hold that the calculated settlement values are larger than the measured ones. To this end, the design and deformation monitoring data of multiple CFG pile composite foundation projects in typical stratum regions of Beijing were collected and sorted out. The study shows that the calculated settlement values are generally smaller than the measured ones without considering rebound-recompression deformation, while the calculated values are close to the measured ones when rebound-recompression deformation is taken into account. Combined with relevant codes, a settlement calculation formula considering both rebound-recompression deformation and additional stress deformation is proposed, which improves the accuracy and efficiency of settlement calculation. The research results can provide references for the design of CFG pile composite foundations and the arrangement of settlement belts.
- CFG pile /
- calculated settlement value /
- measured settlement value /
- rebound-recompression

HTML全文

图 1 瀛海二府项目典型工程地质剖面图

Figure 1. Typical engineering geological profile of Yinghai Erfu project

下载: 全尺寸图片幻灯片

图 2 东小营村项目典型工程地质剖面图

Figure 2. Typical engineering geological profile of Dongxiaoying Village project

下载: 全尺寸图片幻灯片

图 3 海淀幸福里项目A1^#楼工程地质剖面图

Figure 3. Engineering geological profile of building A1^# in Haidian Xingfuli project

下载: 全尺寸图片幻灯片

表 1 瀛海二府项目CFG桩复合地基设计参数

Table 1. Design parameters of CFG pile composite foundation for Yinghai Erfu project

楼号	基底标高/m	桩长/m	桩间距/m	基础尺寸/m	基底平均压力/kPa
1^#	20.39	13.5	1.5×1.5	37.95×12.80	330
2^#	20.39	13.0	1.5×1.5	62.50×14.90	330
3^#	20.39	13.5	1.5×1.5	56.40×12.80	330

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表 2 瀛海二府项目主要地层参数

Table 2. Main stratum parameters of Yinghai Erfu project

地层名称	层厚 /m	质量密度 /(g·cm⁻³)	压缩模量 E_s(p₀～p_0+0.1)/MPa	天然地基承载力/kPa
①素填土	0.8	1.95
②黏质粉土、砂质粉土	3.1	1.99	5.5	110
③₂粉质黏土	2.8	2.04	5.0	130
③₁黏质粉土、砂质粉土	2.7	2.03	6.5	160
④粉质黏土	6.1	1.99	7.0	170
⑤砂质粉土、黏质粉土	2.0	1.99	10.0	210
⑤₂粉砂	1.8	2.05	28.0	220
⑥粉、细砂	5.0	2.10	35.0	250
⑦圆砾、卵石	2.8	2.15	45.0	380
⑧粉质黏土	4.1	2.10	10.5	210
⑨细砂	3.9	2.10	38.0	270

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表 3 瀛海二府项目主楼角点沉降计算值与实测值对比

Table 3. Comparison between calculated and measured settlements at corner points of the main building in Yinghai Erfu project

楼号	附加应力沉降计算值/mm	回弹再压缩变形计算值/mm	沉降计算值/mm	沉降实测值/mm
1^#	−9.32	−4.35	−13.67	−15.12
2^#	−10.70	−5.07	−15.77	−17.60
3^#	−10.21	−4.49	−14.70	−17.57
注：表中沉降实测值为4个角点实测沉降值的平均值。

下载: 导出CSV

表 4 东小营村项目CFG桩复合地基设计参数

Table 4. Design parameters of CFG pile composite foundation for Dongxiaoying Village project

楼号	基底标高/m	桩长/m	桩间距/m	基础尺寸/m	基底平均压力/kPa
1^#	34.6	21.0	1.45×1.45	62.95×15.3	320
2^#	33.2	17.0	1.6×1.6	62.9×14.3	270
3^#	33.1	19.5	1.45×1.45	49.5×14.35	320
5^#	34.7	18.0	1.5×1.5	62.95×14.3	300
G1^#	33.3	21.0	1.4×1.4	82.6×24.9	320

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表 5 东小营村项目主要地层参数

Table 5. Main stratum parameters of Dongxiaoying Village project

地层名称	质量密度 /（g·cm⁻³）	压缩模量 E_s(p_0～p_0+0.1)/MPa	天然地基承载力/kPa
①素填土	1.80
②黏质粉土、砂质粉土	1.94	6.6	100
②₁重粉质黏土	1.91	3.3	90
③粉质黏土	1.98	6.3	140
③₁砂质粉土、黏质粉土	2.03	11.2	160
④粉质黏土	2.01	9.7	150
④₁黏质粉土、砂质粉土	2.03	13.2	180
⑤粉质黏土	1.99	12.1	180
⑤₁黏质粉土、砂质粉土	2.03	16.7	200
⑥粉质黏土	2.01	14.1	190
⑦细砂	2.02	22.0	280

下载: 导出CSV

表 6 东小营村项目主楼角点沉降计算值与实测值对比

Table 6. Comparison of calculated and measured settlements at corner points of the main building in Dongxiaoying Village project

楼号	附加应力沉降计算值 /mm	回弹再压缩变形计算值 /mm	沉降计算值 /mm	结构封顶实测沉降 /mm	λ_t	推测最终沉降/mm
1^#	−10.94	−3.9	−14.84	−7.0	0.426	−16.44
2^#	−8.63	−4.62	−13.25	−7.0	0.483	−14.50
3^#	−9.14	−3.85	−12.99	−7.8	0.432	−18.04
5^#	−13.03	−4.94	−17.97	−8.0	0.444	−18.03
G1^#	−9.91	−4.91	−14.82	−6.2	0.446	−13.90

下载: 导出CSV

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