1. Overview
Absolutely. Bridge jacking is a highly efficient specialized technique in current infrastructure renovation. For common issues such as insufficient under-clearance leading to large trucks scraping the bridge or reduced waterway navigability due to riverbed siltation and seasonal flooding, the jacking technique offers an optimal solution that requires no demolition, has an extremely short construction period, and costs far less than rebuilding.
2. Bridge Scenarios Applicable to Indonesia
Highway and Urban Overpasses (Jembatan Jalan Raya / Overpass): Addressing reduced underbridge clearance caused by repeated road resurfacing or meeting the Ministry of Transportation’s (Kemenhub) height restrictions for specific road grades by increasing clearance.
River Navigation Bridges (Jembatan Lintas Sungai): In regions with heavy river traffic like Sumatra and Kalimantan, elevating bridge height allows larger barges (Tongkang) or vessels to pass smoothly.
Low-Clearance Bridges at Flood Risk: For cities like Jakarta prone to frequent flooding, raising the entire bridge deck prevents water submersion, avoiding structural damage from buoyancy and lateral flood impact.
Simply Supported and Continuous Beam Bridges (Gelagar Beton / Steel Girder): The most widely used bridge types with the highest technical adaptability and shortest construction periods.
3. Technical Principles and Core Processes
Structural Assessment: First, conduct load-bearing verification according to Indonesia’s bridge seismic design standards (SNI 2833:2016).
Synchronous Jacking: Install a PLC intelligent hydraulic synchronous jacking system at the abutment/pier locations to achieve millimeter-level precision control, ensuring no secondary stress cracks occur in the beam during the lifting process.
Pier Extension: After the beam is lifted to the predetermined height, permanent repositioning is achieved by extending the pier or replacing it with a taller bearing pad.
Smooth Transition: Coordinated with the slope adjustment of the bridge approach (Oprit) to ensure driving comfort and safety.
4. Significant Advantages Compared to Demolition and Reconstruction
Shortened Construction Period: Compared to demolition and reconstruction, which can take months or even a year, lifting construction typically requires only 1/3 of the time, allowing for rapid restoration of traffic on busy road sections.
Cost Reduction: The overall cost is merely 40%~70% of building a new bridge.
Environmentally Friendly: Eliminates the need for large-scale demolition waste, aligning with the government’s Green Infrastructure policy.
Minimal Traffic Disruption: Enables “load-bearing jacking” or short-term road closure lifting, allows uninterrupted navigation for cross-river bridges, and minimizes impact on logistics efficiency.
V. Legal, Regulatory, and Constraining Factors
Compliance with Standards: The renovated bridge must undergo a reassessment of its stability in Indonesia’s high-intensity seismic zones to meet the latest safety evaluation criteria.
Approval Process (Legal Aspect): For bridges involving national or provincial highways, it is necessary to report to PUPR (Ministry of Public Works and Housing) and update the relevant technical documentation according to the latest traffic standards.
Not recommended situations:
Severe carbonization or exposed reinforcement in the main bridge structure, or significant displacement/tilting of foundations due to earthquakes.
Severe scouring of bridge pier foundations where reinforcement costs are prohibitively high.
6. Summary
With economic development increasing demands for logistics efficiency, “elevation instead of reconstruction” has become the preferred engineering solution for addressing bridge height restrictions, improving navigation standards, and adapting to climate change (sea level rise/flooding).
Expert reminder:
Due to Indonesia’s high rainfall and relatively soft soil in some areas (such as alluvial plains), it is essential to strengthen the monitoring of scour depth at the bridge pier foundation before and after the bridge lifting. This ensures the overall stability of the elevated bridge during flood peaks in the rainy season.
一、 概述
完全可以。桥梁整体顶升（Bridge Jacking）是目前基础设施改造中非常高效的特种技术。针对常见的桥下净空不足导致大型货车刮蹭，以及因河床淤积、季节性洪涝导致的河道通航能力下降，顶升技术提供了一种无需拆除、工期极短且成本远低于重建的较优方案。
二、 适用于印尼的桥梁场景
公路与城市立交桥（Jembatan Jalan Raya / Overpass）： 解决因路面反复摊铺导致桥下净空减小，或者为满足交通部（Kemenhub）对特定等级公路限高要求而进行的净空提升。
跨河通航桥梁（Jembatan Lintas Sungai）：在苏门答腊、加里曼丹等河流运输繁忙地区，通过抬升桥梁高度，使更大的驳船（Tongkang）或船只能够顺利通过。
受洪水威胁的低净空桥： 针对雅加达等城市频发的内涝问题，整体抬升桥面可防止洪水淹没桥身，避免桥梁受浮力及洪水侧向冲击而损毁。
简支梁与连续梁桥（Gelagar Beton / Steel Girder）：应用较广的桥梁类型，技术适配度较高，施工周期较短。
三、 技术原理与核心流程
结构评估：首先根据印尼桥梁抗震设计标准（SNI 2833：2016）进行承载力验算。
同步顶升： 在桥墩（Abutment/Pilar）位置安装PLC智能液压同步顶升系统，实现毫米级精度控制，确保梁体在抬升过程中不产生次生应力裂缝。
墩台接高： 梁体升至预定高度后，通过接高墩台或更换加高支座（Bearing Pad）实现永久复位。
平滑过渡： 配合桥头引道（Oprit）的坡度调整，确保车辆行驶的舒适性与安全性。
四、 相比拆除重建的巨大优势
缩短工期： 相比拆除重建动辄数月甚至一年的工期，顶升施工通常仅需 1/3 的时间，能迅速恢复繁忙路段的交通。
降低造价： 综合成本仅为新建桥梁的 40%~70%。
环境友好： 无需大规模拆除建筑垃圾，符合政府推行的绿色基础设施（Green Infrastructure）政策。
交通干扰小：可实现“带载顶升”或短时间封路顶升，跨河桥梁可不中断通航，较大限度减少对物流效率的影响。
五、 法律、规范与限制因素
规范符合性： 改造后的桥梁必须重新评估其在印尼高烈度地震带下的稳定性，符合较新的安全评估标准。
审批程序（Legal Aspect）： 涉及国家公路或省级公路的桥梁，需报备 PUPR（公共工程与住房部），并根据较新的通行标准更新相关技术档案。
不建议情况：
桥梁主体结构出现严重碳化、露筋或因地震导致基础严重位移、倾斜。
桥墩基础存在严重的冲刷（Scouring）且加固成本过高。
六、 总结
随着经济发展对物流运输效率要求的提高，“以顶升代替重建”已成为解决桥梁限高、提升通航水平及应对气候变化（海平面上升/洪水）的好 工程手段。
专家提示：
由于印尼降雨量大且部分地区土质较软（如冲积平原），在桥梁顶升前后，必须加强对桥墩基础冲刷深度的监测，确保加高后的桥梁在雨季洪峰冲击下的整体稳定性。