在科尔比学院, the design-build Johnson Pond Houses project delivered a four-building student residence complex 仅仅15个月 从单纯的项目构想出发. 组成的 预制的 structural units and pre-cast concrete foundation panels, the 40,000 sq. ft. 设施容纳200个学生床位.
设计
当计划一个激进的项目时间表时, utilize repetitive design details to ensure quality and efficiency as multiple elements are built simultaneously off-site.
预制混凝土基础
The concrete foundations at Johnson Pond Houses were designed to eliminate on-site formwork and ease transportation to site. 百家乐软件的 虚拟设计与施工 (VDC) team developed 35 concrete panel shop drawings to be repeated for each building. 每一块面板都包括每一处渗透, 起重装置, 加固细节和整理要求, 嵌板之间有隐蔽的接缝. Foundations Engineer of Record Trillium Engineering 钢筋 details and accelerated drawing approvals.
To confirm there were no conflicts between the concrete, 体积模块化结构单元模型, 嵌入和现场工作, each panel type was digitally modeled and clash-detected with the structural unit models. 排水管道, 暖通空调系统百叶开口, 锅炉通风口, sprinkler drains and 电 conduits were modeled and sleeved in the panels based on the 3D model of Mechanical, Electrical, Plumbing and Fire Protection (M / E / P / FP)系统.
体积模块化结构单元
KBS建设公司. (KBS) 预制的 structural units that allowed in-factory framing, 电, 管道和消防装置. 百家乐软件 and the Kaplan Thompson Architects design team engaged M/E/P/FP design-build subcontractors for weekly coordination meetings to advance the design with KBS. With 18 structural units per building repeated across four houses, coordination and review of KBS shop drawings were required twelve weeks prior to on-site delivery.
The design-build delivery of the four repetitive buildings allowed the team to rapidly adjust design details and apply adjusted concepts from the first building to the last in real time for schedule and quality improvements. The structural units were designed to deliver nearly complete interiors for all spaces except the corridors and pre-cast basements.
预制构件
Traditional on-site construction limits simultaneous trades on site, due to its inherent sequential nature (first comes site work, 然后基础, 框架等等). 预制支撑更快, higher-quality construction by simultaneously managing multiple trades and delivering materials to site only when installation-ready.
预制混凝土基础
百家乐软件在预铸场自演
在结构单元交付上没有任何灵活性, the team had only four working days to set the foundation walls for each building. 百家乐软件 turned the parking lot adjacent to the project into a near-site pre-casting yard to construct foundations during sitework, allowing the team to pre-cast and pre-kit the panels on truck beds for just-in-time (JIT) delivery once the site was ready.
VDC集团的详细图纸，康西格利的 self-perform 团队组成并预制了140块面板. A heated form structure supported rapid pre-cast at ground level, reducing jobsite hazards such as weather-caused slips and potential soil/excavation collapse in the foundation holes. 百家乐软件木匠的预铸体系形成了, 钢筋, 在同一, 在五天的周期内对面板进行固化和剥离.
体积模块化结构单元
Structural unit pre-fabrication occurred simultaneously with site preparation, 基础和钢材制造, all of which converged on the date units were delivered to site. Each 18-unit building took 20 working days to pre-fabricate, 包括安装机电系统, 绝缘, 可操作的窗户, an exterior air vapor barrier and a highly insulated exterior wall system to provide a Net Zero Ready structure. 卧室单元的内部, bathrooms and common area rooms included the installation of drywall, 灯具, 插座, 地板及面漆.
交付 & 安装
预制降低了现场劳动密度, ensures manpower consistency and decreases safety incidents. To reap the benefits of off-site prefabrication against an aggressive project schedule, 各行各业的广泛协调是必不可少的.
预制混凝土基础
Concrete panels were delivered just-in-time and placed with a crane with structural steel support beams. 百家乐软件的 self-perform installers set the entire foundation wall system in less than three days—from the first panel being set to the start of wood sill plate installation.
Threaded inserts allowed clean picks off the panels’ sides. Embedded cam rotational picks rotated the panels from their flat to vertical positions for installation. Temporary bracing held the panels in place while awaiting structural unit installation, and top embeds were set to lock in the units come time for installation.
体积模块化结构单元
结构单元安装
Structural units were delivered in two stages per building (left and right side, two-floors high). In typical 预制的 structural unit assembly, units fit with no openings to the exterior. 独有的约翰逊庞德住宅, the structural units had openings for corridor connections when set in place. Keeping each building weathertight between setting units and getting the roof tilted required careful, 总协调.
百家乐软件 reviewed punch list items throughout construction, catching deficiencies when work was first put in place. Every item delivered was immediately quality reviewed, further accelerating the completion of each building by taking early corrective action.