Overview
An open caisson is a prefabricated, hollow structure sunk into the ground to create a stable foundation in challenging soil or waterlogged conditions. It is commonly used in civil engineering projects like bridge piers, underground tanks, and offshore platforms. The construction begins with casting the caisson on-site or transporting pre-built sections. As excavation proceeds beneath it, the caisson gradually sinks under its own weight, with workers or machinery removing soil from the interior. This method avoids the need for extensive dewatering, making it cost-effective for deep foundations.
Structure and Working Principle
Open caissons typically feature reinforced concrete or steel walls with a cutting edge at the base to facilitate sinking. The structure remains open at the top during excavation, allowing direct access for soil removal. As the caisson descends, additional sections may be added to achieve the desired depth. Stability is maintained by balancing external soil and water pressure with the caisson's weight. Once the target depth is reached, the base is sealed, and the interior is filled with concrete to form a solid foundation.
Key Features
Open caissons excel in watertightness, preventing groundwater inflow during construction. Their modular design allows adaptation to varying project depths and diameters. Unlike pneumatic caissons, open caissons do not require compressed air, reducing worker health risks. However, they are limited to stable soil conditions where collapse risks are minimal during sinking. Modern variants may include temporary supports or slurry walls for added stability in loose soils.
Application Areas
Major applications include bridge foundations in rivers or soft soils, where traditional piling is impractical. They are also used for underground utility shafts, wastewater treatment plants, and marine structures. In urban settings, open caissons minimize surface disruption compared to open-cut excavations. Their ability to reach depths of 50+ meters makes them ideal for high-rise buildings in seismic zones, providing enhanced load distribution and liquefaction resistance.
Maintenance and Precautions
During construction, continuous monitoring of vertical alignment is critical to prevent tilting. Laser guidance systems and inclinometers are commonly employed. Post-construction, caissons require inspection for seepage or structural cracks, especially in corrosive environments. Cathodic protection may be applied to steel caissons. Regular checks of adjacent ground stability help detect potential settlement issues early.
B2B Procurement Guide
When sourcing open caissons, prioritize suppliers with ISO 9001-certified manufacturing processes and a portfolio of similar-scale projects. Request detailed sinking method statements and contingency plans. For cost efficiency, consider prefabricated segments for projects above 15m depth. Always verify material test certificates for concrete strength (typically ≥35MPa) and steel reinforcement corrosion resistance. Lead times for custom designs range 8-12 weeks.
Related Manufacturers
- 主营：排水沟、水型槽、外墙砖、电力电缆圆井沉井、植草砖、水磨石、路沿石、波纹管、透水砖、渗水砖、面包砖、隐形井盖、水泥花砖、水泥井盖、树脂井盖、铸铁溢流井、生态地铺石、球墨铸铁井盖、混凝土检查井、仿古铺地青砖、混凝土路牙石、河道六角护坡砖
- 主营：YZ型渣浆泵、立式渣浆泵、耐腐蚀液下泵、潜水渣浆泵、液下泵、液下渣浆泵、渣浆泵、渣浆泵配件、抽沙泵
- 主营：HDPE双壁波纹管、、中空壁缠绕管、HDPE给水管、下沉井、HDPE钢丝网骨架复、MPP电力管、克拉管
- 主营：泡棉条、密封胶、泡沫条、泡沫棒、泡沫板、塑料棒、密封膏、塑料板、聚乙烯棒、填缝材料、玻璃垫棒、聚硫灌封胶、膨胀止水胶、聚氨酯弹性胶、非下垂灌封胶、聚乙烯发泡板、自流平灌封胶、高压聚乙烯板、防水聚氨酯胶、高弹性防水胶、聚氨酯防水胶、聚氨酯结构胶、桥梁泡沫止浆棒、聚乙烯闭孔泡条、闭孔泡沫填缝条
- 主营：球墨铸铁井盖、球墨铸铁篦子、球墨铸铁井盖价格、路灯方型下沉井、球墨铸铁沟盖板、酸洗钝化无缝钢管、重型球墨铸铁井盖、国标球墨铸铁管、防尘降球墨铸铁井盖、铸铁雨水篦子、柔性球墨铸铁管价格、轻型铸铁井盖、离心球墨铸铁管报价
- 主营：水泥管、排水管道、水泥涵管、管平口承、承插口排污、高硬度防尘、水泥排水管、平口排水管、污水下水管、平口管水泥、钢筋混凝土、混凝土涵管、混凝土排水管、承插口排水管、预制下水道管、平口混凝土管、钢筋混凝土水泥管、钢筋混凝土钢承口顶管、钢筋混凝土检查井、平口水泥顶管、水泥平口管、预制平口水泥管、水泥检查井、承插式平口水泥管、企口水泥管
- 主营：给水管、pvc线槽、pvc实壁、防下沉井、钢骨架、联塑pvc、pvc给水、排污管、钢带管、复合管、pvc排水、排水管、聚乙烯、pvc线管、穿线管、联塑ppr、hdpe穿线、hdpe塑钢、hdpe双壁、pe管联塑、pe燃气管、pe通讯管、聚氯乙烯、排水排污、防水塑料、双壁波纹
- 主营：方柱扣、防尘网、警示带、铁马凳、u型螺栓、建筑丝杠、安全平网、钢板橡胶、雨水篦子、止水螺杆、钢筋马凳、u型丝螺栓、楼梯护角筋、防护防坠网、脚手架配件、免拆收口网、阻燃密目网、卡箍梁夹具、穿墙丝螺栓、道路减速带、水泥收口网、铸铁雨水井盖、镀锌预埋建筑、楼层镀锌铁皮、浇筑模板夹具
- 主营：树脂排水沟、塑料排水沟、树脂穿线井、防沉井盖重型、井盖、减震器、减振装置、产保一体床、母猪产床、空气减震器、复合电缆沟盖板、树脂手孔井、树脂复合排水沟、变压器减震器、水泵减震台座、树脂线性排水沟、不锈钢缝隙盖板、不锈钢装饰井盖、树脂雨水篦子、球墨铸铁井盖、树脂井盖、天花板吊顶减震器、墙面减震器、猪用水位控制器、猪用饮水嘴、猪用饮水碗
- 主营：水下作业、水下管道封堵、水下气囊封堵、沉井水下封底施工、水下切割拱机头
- 主营：顶管施工、定向钻拉管、非开挖式管道、沉井顶管、岩石机械顶管、泥水平衡机械顶管、管道修复、管道置换、过路顶管、过江顶管、过山顶管、非开挖工程、非开挖顶管施工队、箱涵顶管、矩形顶管、人工顶管、水磨钻、顶管拉管、岩石破碎、岩石顶管、顶管、非开挖、盾构机
- 主营：顶管施工、管道清洗、化粪池清理、管道置换修复、拉管施工、导向钻拉管施工、土压平衡顶管施工、定向钻拉管、非开挖顶管施工、雨污管道检测排查、管道修复、管道检测置换修复、管道非开挖顶管、管道非开挖顶管施工、定向钻拉管施工、燃气顶管拉管施工、供应非开挖顶管公司、非开挖顶管施工建设、非开挖顶管、非开挖顶管作业、地下顶管、非开挖管道工程、全城非开挖顶管、液压非开挖钻机、专业非开挖施工
- 主营：综合管廊模具、方涵模具、箱涵模具、沉井模具、顶管模具、排水沟模具、水渠模具、电力检查井模具、电缆沟模具、拱形骨架护坡模具、防撞墙模具、隔离墩模具、挡土墙模具、圆涵模具、生态护坡模具、乐高块挡土墙模具、检查井模具、防浪块模具、风电基础模板、风电塔筒模具、遮板模具、围墙模具、基础墩模具、水井房模具、楼梯模具
- 主营：双壁波纹管、工程排污管道、HDPE给水管、重型带锁防盗防下沉井、钢丝网骨架管、HDPE中空壁缠绕管、MPP电力电缆保护管、七孔梅花管、克拉管、玻璃钢化粪池、塑料检查井
- 主营：雨水收集、溢流井、渗透井、排水沟、环保雨水口、塑料管道、井盖