Yushan Bridge
Engineering Service
Large-Scale Pile Foundation Works
大型桩基工程施工
Specialized construction services for large-scale pile foundations, including large-diameter bored piles, deep and long piles, RCD reverse-circulation drilling and rotary drilling for major infrastructure, bridge, industrial and energy projects.
面向重大基础设施、桥梁、工业及能源项目的大型桩基工程施工服务，涵盖大直径钻孔灌注桩、深长桩、RCD反循环钻进及旋挖钻进等内容。
Supplied by Zhejiang Etone Specialized Foundation Engineering Co., Ltd.
Overview
Service overview
ETONE provides large-scale pile foundation construction services for projects requiring deep pile construction, large equipment deployment, strict verticality control and stable hole-forming quality. The service integrates RCD air-lift reverse circulation, pump-suction reverse circulation, rotary drilling and dedicated drilling tools according to geological conditions.
The company’s equipment reserve includes more than 50 sets of RCD reverse-circulation drilling rigs and more than 20 sets of medium and large rotary drilling rigs. For large-diameter and deep pile works, ETONE can organize casing embedding control, mud performance control, drilling parameter control, bottom sediment control and hole verticality control based on project requirements.
易通特基可为需要深桩施工、大型设备投入、严格垂直度控制和成孔质量控制的项目提供大型桩基工程施工服务。该服务可根据地质条件组合采用RCD气举反循环、泵吸反循环、旋挖钻进及专用钻具等工艺。
公司拥有RCD反循环钻机50余台套、中大型旋挖钻机20余台套。针对大直径、深长桩工程，可围绕护筒埋设控制、泥浆性能控制、钻进参数控制、孔底沉渣控制及成孔垂直度控制组织施工。
Scope
Service scope
Key components that may be provided for relevant engineering scenarios.
- RCD reverse-circulation drilling helps support deep-hole construction with good verticality and reduced bottom sediment
- Air-lift RCD can use counterweights and multiple centralizers to improve verticality control in large-diameter pile construction
- Pump-suction reverse circulation provides lightweight equipment configuration and good applicability for overburden construction
- Rotary drilling provides high automation and efficient soil-layer construction
- Construction control can cover casing verticality, mud stability, drilling parameters, hole cleaning and hole verticality
- In-house equipment resources support project delivery reliability
- RCD反循环钻进适用于深孔施工，有利于成孔垂直度和孔底沉渣控制
- RCD气举反循环可通过配重及多道扶正器提高大直径桩成孔垂直度控制能力
- 泵吸反循环设备相对轻量化，对覆盖层施工适用性较好
- 旋挖钻进自动化程度较高，适用于土层高效施工
- 施工控制可覆盖护筒垂直度、泥浆稳定、钻进参数、清孔及成孔垂直度
- 自有设备资源有利于保障项目履约和施工组织
Scenarios
Applicable project scenarios
Typical project conditions where this offering may be relevant.
- Large-diameter bored cast-in-place piles
- Deep and long pile foundations
- Bridge and cross-sea bridge pile foundations
- Industrial and energy infrastructure foundations
- Port, wharf and transport infrastructure foundation works
- Foundation projects under complex marine, urban or industrial conditions
- 大直径钻孔灌注桩
- 深长桩基础
- 桥梁及跨海桥梁桩基础
- 工业及能源基础设施基础
- 港口、码头及交通基础设施基础工程
- 复杂海域、城市或工业场地条件下的基础工程
Offering Details
Technical Details & Applications
- ETONE has developed strong execution capability in large-diameter bored pile construction for bridge foundations, especially under marine conditions, deep overburden, hard rock and complex strata. The company combines RCD air-lift reverse-circulation drilling, pump-suction reverse-circulation drilling and rotary drilling with customized drilling tools, counterweight systems, centralizers, mud control and secondary hole cleaning measures to improve borehole stability, verticality and drilling efficiency.
- Representative case: Yushan Bridge, a branch project of the Ningbo-Zhoushan Port main corridor in China. The bridge is located in a harsh offshore environment with frequent typhoons, long monsoon periods and limited effective working days at sea. The project involved approximately 170 pile foundations, with maximum construction pile diameters of 5.0-3.8 m, maximum pile length of 148 m and maximum hole depth of 153 m.
- In this project, ETONE focused on verticality control for casing installation and borehole formation, slurry performance control, drilling efficiency improvement and bottom sediment cleaning. By optimizing drilling parameters and using counterweight-assisted drilling tools with cylindrical roller centralizers, the project achieved drilling horizontal offset within 30 mm and drilling inclination within 0.5%, demonstrating ETONE’s capability in deep and large-diameter pile foundation construction for offshore bridge engineering.
技术说明与应用案例
- 易通特基在桥梁大直径钻孔灌注桩施工方面具有较强实施能力，尤其适用于海上环境、深厚覆盖层、硬岩及复杂地层条件。公司综合应用RCD气举反循环、泵吸反循环及旋挖等工艺，并配合专用钻具、配重系统、扶正装置、泥浆控制和二次清孔等措施，提高成孔稳定性、垂直度控制能力及钻进效率。
- 代表案例：鱼山大桥。该项目为宁波舟山港主通道支线工程，施工环境处于海上恶劣工况，常年受台风、季风及海上有效作业时间不足等因素影响。项目桩基础总数约170根，最大施工桩径为5.0-3.8 m，最大桩长148 m，最大孔深153 m。
- 在该项目中，公司重点围绕护筒埋设垂直度控制、成孔垂直度控制、泥浆性能控制、钻进效率提升及孔底沉渣控制等关键环节展开施工。通过优化钻进参数，并采用配重钻具与筒式滚轮扶正器等措施，项目实现钻孔水平偏位控制在30 mm以内、钻孔倾斜度控制在0.5%以内，体现了公司在海上桥梁深长大直径桩基础施工中的综合技术能力。
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