TUNNELLING & UNDERGROUND SPACE TECHNOLOGY · 2026

H型钢替代灌注桩TRD复合墙体刚度提升新突破

H-Section Steel Replaces Bored Piles:A Breakthrough in TRD Composite Wall Stiffness

ScienceDirect 学术前沿 · Soft Soil Deep Excavation Optimization

等厚度水泥土连续墙（TRD工法）以其卓越的止水性和连续成墙品质，近年来在软土地区深基坑工程中快速普及。然而，水泥土抗拉强度低的先天局限，使其通常需要内插混凝土灌注桩才能承担主动土压力——这一做法工序繁琐、成本高昂。2026年一季度，国际顶刊 Tunnelling and Underground Space Technology发表最新研究，提出以H型钢替代混凝土灌注桩，在保持甚至提升围护刚度的同时，大幅降低施工复杂度。

The TRD (Trench Cutting Re-mixing Deep wall) method has rapidly gained adoption in soft-soil deep excavation projects due to its superior water-tightness and seamless wall quality. However, its inherently low tensile strength requires the insertion of concrete bored piles to resist lateral earth pressure — a practice that is costly and complex. In Q1 2026, the leading international journal Tunnelling and Underground Space Technologypublished research proposing to replace concrete bored piles with H-section steel beams, maintaining or enhancing retaining stiffness while significantly reducing construction complexity.

TRD工法（Trench Cutting Re-mixing Deep wall method）由日本神户制钢所于1993年研发，通过链锯式切割箱横向推进，在地下形成无接缝、等厚度的水泥土连续墙。其最大深度可达80m，适用于砂土、黏土、卵砾石等各类复杂地层，止水效果显著优于传统三轴搅拌桩。

Developed by Kobe Steel, Japan in 1993, the TRD method uses a chain-saw cutting box advancing horizontally to form a seamless, uniform-thicknesssoil-cement wall underground. It reaches depths up to 60 m and is applicable to sand, clay, gravel and other complex strata, offering far superior water-tightness compared to conventional triple-axis mixing piles.

然而，水泥土墙体抗拉强度仅为抗压强度的1/10左右，无法独立承受基坑开挖产生的弯矩。传统解决方案是在TRD墙内插入混凝土灌注桩（钻孔桩），形成类SMW工法复合支护体系——但这带来了三大痛点：

However, the tensile strength of soil-cement is only ~1/10 of its compressive strength, making it unable to independently resist the bending moment caused by excavation. The conventional solution is to insert concrete bored piles into the TRD wall — forming a SMW-like composite system — but this creates three major pain points:

• ① 施工工序复杂，灌注桩泥浆污染处理麻烦

  Complex construction sequence; slurry disposal from bored piles is troublesome.

• ② 垂直度控制困难，易与TRD墙体发生碰撞偏斜

  Verticality control is difficult; the pile can deviate and collide with the TRD wall.

• ③ 工期长，造价高，可重复利用性差

  Long construction period, high cost, and the pile cannot be recovered for reuse.

本研究提出的核心方案：将TRD墙内的混凝土灌注桩全部替换为H型钢，使水泥土墙与H型钢形成”整体式墙-桩复合支护体系”（Integrated Wall-Pile Primary Support）。

The core proposal of this study is to replace all concrete bored piles with H-section steel beamsinserted into the TRD wall, forming an “Integrated Wall-Pile Primary Support” system in which the soil-cement wall and H-beams act compositely.

支护体系结构对比 · System Comparison

H型钢与TRD复合支护的实践已在国内多个软土城市深基坑项目中得到应用，以下为典型参数参考：

The TRD + H-steel composite system has been applied in multiple soft-soil urban deep excavation projects across China. Representative project parameters are referenced below:

本研究从理论层面为”TRD+H型钢”复合支护体系提供了系统的力学验证依据，具有以下行业价值：

This study provides systematic mechanical validation for the TRD + H-steel composite system at the theoretical level, offering the following industry value:

• 🔬 理论支撑：建立了TRD+H型钢复合体系的变形计算模型，填补了设计规范空白

  Theoretical foundation:Establishes a deformation calculation model for the TRD + H-steel system, filling a gap in design codes.

• 💰 经济价值：H型钢可拔出回收利用，降低工程全生命周期成本，相比灌注桩节省可观

  Economic value:H-beams are recoverable for reuse, reducing lifecycle costs considerably compared to abandoned bored piles.

• 🌿 绿色施工：减少泥浆废弃物，符合建筑业绿色低碳发展趋势

  Green construction:Reduces slurry waste, aligning with the construction industry’s green and low-carbon development trend.

• 🌏 应用前景：对越南、东南亚等软土地区大规模基础设施建设（地铁、机场、高速）具有重要推广价值

  Global application:Highly relevant for large-scale infrastructure in soft-soil regions such as Vietnam and Southeast Asia (metro, airport, expressway projects).

📑 基础设施建设技术前沿 · Infrastructure Technology Frontier