单排桩组合双排桩支护体系设计方法研究

谢鑫

doi:10.20265/j.cnki.issn.1007-2993.2025-0359

单排桩组合双排桩支护体系设计方法研究

doi: 10.20265/j.cnki.issn.1007-2993.2025-0359

谢鑫

厦门华岩勘测设计有限公司，福建厦门　361004

详细信息

作者简介:
谢　鑫，男，1976年生，大学本科，正高级工程师，注册土木工程师（岩土）。研究方向：岩土工程。E-mail：44148595@qq.com

中图分类号: TU473
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- 文章访问数: 54
- HTML全文浏览量: 15
- PDF下载量: 20
- 被引次数: 0
出版历程
- 收稿日期: 2025-08-12
- 修回日期: 2025-10-23
- 录用日期: 2026-01-08
- 刊出日期: 2026-08-08

Design method for retaining structure of single-row pile combined with double-row pile

XIE Xin

Xiamen Huayan Survey and Design Co., Ltd., Xiamen 361004, Fujian, China

摘要

摘要: 随着城市化进程加快，基坑周边环境越来越复杂，单排桩支护结构难以满足要求时，常配合支撑构件共同受力。而在支撑受限的区域，采用双排乃至多排桩支护体系尤为必要。目前双排桩支护结构的接受度较为广泛，已有成熟的设计方法。超过两排桩的多排桩虽在实践中已有应用，但计算方法及受力模式尚未统一。以项目实践为依托，对单排桩组合双排桩支护体系的设计方法进行系统研究，根据桩−土协调变形分析，认为后排桩与双排桩的协同受力主要通过斜撑实现，计算模型简化为桩−桩协调变形，形成后排桩、双排桩分开计算，两者通过斜撑杆件协调变形的计算方法，同时研究了单排桩组合双排桩支护体系等效模型法和有限元方法。结合现场监测数据进行对比分析，验证了所提方法的合理可行性，可为类似项目提供参考和借鉴。
- 多排桩 /
- 支护体系 /
- 等效模型 /
- 数值模拟 /
- 设计方法
Abstract: With the improvement of urbanization, the environmental conditions of foundation excavation are becoming increasingly complex. Single-row-pile wall as a kind of retaining structure can no longer meet requirements alone, and often work together with strut. In areas where strut is limited, the application of double-row or even multi-row pile retaining structure is very necessary. At present, the acceptance of double-row pile retaining structure is relatively wide, and there are mature design methods. Although multiple-row piles have been used in practice, the calculation method and stress mode have not yet been unified. Based on practical engineering projects, this study systematically investigates the design methodology for retaining systems that combine single-row and double-row piles. Through an analysis of pile-soil deformation compatibility, it is concluded that the synergistic load-bearing mechanism between the rear piles and the double-row piles is primarily achieved through inclined struts. The calculation model is simplified to pile-pile coordinated deformation, and a calculation method is proposed in which rear row piles and double-row piles are calculated separately with deformation coordinated by inclined strut members. Meanwhile, the equivalent model method and finite element method for this retaining system were studied. Comparative analysis with field monitoring data verifies the rationality and feasibility of the proposed method, which can provide references for similar engineering projects.
- multiple-row piles /
- retaining structure /
- equivalent model /
- numerical simulation /
- design method

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图 1 基坑平面图

Figure 1. Plane of foundation pit

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图 2 支护体系剖面图（单位：mm）

Figure 2. Section of retaining structure (Unit: mm)

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图 3 支护结构计算简图

Figure 3. Calculating sketch of retaining structure

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图 4 剖面计算结果

Figure 4. Section calculation results

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图 5 剖面计算结果

Figure 5. Section calculation results

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图 6 水平位移计算结果

Figure 6. Calculation results of horizontal displacement

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图 7 水平位移监测结果

Figure 7. Monitoring results of horizontal displacement

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表 1 主要土层参数

Table 1. Main parameters of the soil layer

土层	重度/(kN·m⁻³)	压缩模量/MPa	黏聚力c/kPa	内摩擦角φ/(°)	F_rb/kPa
填砂	19.0	4.5	2	20	40
淤泥	16.0	2	11	2.5	15
全风化花岗岩	19.5	25	30	24	100
散体状强风化花岗岩	20.5	45	35	30	220
碎裂状强风化花岗岩	22.5		(50)	(30)	320
中等风化花岗岩	25.0		(80)	(35)	1100
注：F_rb为土体与锚固体极限摩阻力标准值；( )内的数据为裂隙面抗剪强度指标经验值。

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