Xiajin Bridge
Engineering Service
Bridge Foundation Engineering
桥梁基础工程
Foundation engineering services for bridge and cross-sea bridge projects, including main pier foundations, auxiliary pier foundations, large-diameter pile foundations and marine foundation works under complex geological and hydrological conditions.
面向桥梁及跨海桥梁项目的基础工程施工服务，涵盖主墩基础、辅助墩基础、大直径桩基及复杂地质、水文条件下的海域基础工程。
Supplied by Zhejiang Etone Specialized Foundation Engineering Co., Ltd.
Overview
Service overview
ETONE provides bridge foundation engineering services for major transport infrastructure projects. The company’s experience covers cross-sea bridges, main tower foundations, main pier foundations and large-diameter bored pile construction under marine and complex geological conditions.
For bridge projects involving deep water, soft soil, sandy soil, undulating bedrock, hard rock, inclined rock faces or isolated boulders, ETONE can select RCD reverse-circulation drilling, rotary drilling, impact drilling or combined process routes based on project needs. The company’s bridge foundation practice emphasizes equipment matching, verticality control, drilling efficiency, bottom sediment control and pile quality management.
易通特基可为重大交通基础设施项目提供桥梁基础工程施工服务，工程经验覆盖跨海桥梁、主塔基础、主墩基础及海域和复杂地质条件下的大直径钻孔灌注桩施工。
针对深水、软土、砂性土、基岩面起伏、硬岩、斜岩面或孤石等桥梁基础工况，公司可根据项目需要选用RCD反循环、旋挖、冲击钻或组合工艺路线。桥梁基础施工重点围绕设备选配、垂直度控制、钻进效率、孔底沉渣控制及桩基质量管理展开。
Scope
Service scope
Key components that may be provided for relevant engineering scenarios.
- Capability for large-diameter and long pile construction in bridge projects
- Process selection can cover RCD, rotary drilling and impact drilling according to stratum conditions
- For hard granite, staged core drilling and step-by-step hole enlargement can improve construction efficiency
- For inclined rock strata, pilot drilling and centralizer-assisted correction can support verticality control
- For isolated boulders, treatment measures may include slag-bucket removal, cone drill light-pressure slow drilling and core treatment
- Project experience includes major bridges in China and overseas infrastructure markets
- 具备桥梁工程大直径、长桩施工能力
- 可根据地层条件选择RCD、旋挖、冲击钻等工艺
- 针对高强度花岗岩，可采用先取芯、后逐级扩孔方式提高施工效率
- 针对斜岩地层，可采用先导钻进及扶正器辅助纠偏控制垂直度
- 针对孤石，可采用捞渣斗取出、牙轮筒钻轻压慢钻及取芯处理等措施
- 具备中国重大桥梁及海外基础设施项目经验
Scenarios
Applicable project scenarios
Typical project conditions where this offering may be relevant.
- Cross-sea bridge foundation projects
- Main tower and main pier pile foundations
- Large-diameter bridge bored piles
- Bridge foundations in marine and complex geological conditions
- High-strength rock and inclined rock strata drilling
- Transport infrastructure foundation construction
- 跨海桥梁基础工程
- 主塔及主墩桩基础
- 桥梁大直径钻孔灌注桩
- 海域及复杂地质条件桥梁基础
- 高强度岩石及斜岩地层钻进
- 交通基础设施基础工程
Offering Details
Technical Details & Applications
- ETONE’s bridge foundation engineering capability covers large-diameter pile foundations for cross-sea bridges, highway bridges and major transport infrastructure. The company can select and combine RCD reverse-circulation drilling, rotary drilling, impact drilling and customized drilling tools according to marine conditions, pile diameter, rock strength, inclined rock surfaces, boulder content and drilling depth.
- Representative case: Xiajin Bridge. The Xiajin Bridge (Xiamen section) is designed as an important connection between Xiamen Island and Xiamen Xiang’an International Airport. The northeast and southeast arch seats of the bridge are located offshore and adopt group pile foundations, with 20 variable-diameter bored cast-in-place piles on each side.
- The project involved silty clay, sandy clay, fully weathered granite, strongly weathered granite and moderately weathered granite. Some piles penetrated 2–24 m into moderately weathered granite, with rock strength reaching 140–150 MPa and a high content of isolated boulders. ETONE adopted rotary drilling with core drilling and step-by-step hole enlargement to improve drilling efficiency in high-strength granite. For inclined rock surfaces and irregular rock texture, pilot drilling and centralizer-assisted drilling tools were used to control verticality. For isolated boulders, different treatment methods were adopted according to boulder size, including direct removal, pressing and slow drilling, and core drilling treatment.
技术说明与应用案例
- 易通特基的桥梁基础工程能力覆盖跨海桥梁、公路桥梁及重大交通基础设施中的大直径桩基础施工。公司可根据海域条件、桩径、岩石强度、斜岩面、孤石含量及钻孔深度等因素，组合选用RCD反循环钻进、旋挖钻进、冲击钻进及专用钻具。
- 代表案例：厦金大桥。厦金大桥厦门段是连接厦门本岛与厦门翔安国际机场的重要通道，桥梁东北侧和东南侧拱座位于海上，采用群桩基础，两侧各设置20根变直径钻孔灌注桩。
- 该项目地层包括粉质黏土、砂质黏性土、全风化花岗岩、砂土状强风化花岗岩及中风化花岗岩，部分桩基入中风化花岗岩2–24 m，岩石强度达140–150 MPa，且地层中孤石含量较高。公司采用旋挖取芯后逐级扩孔的方式，提高高强度花岗岩钻进效率；针对斜岩面及不规则岩层纹理，通过先导孔钻进和扶正器辅助钻具控制垂直度；针对孤石，根据孤石尺寸分别采取直接捞取、压实后轻压慢钻及取芯处理等措施。
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