Elevator Construction Arrangement for Phased Hoistway Installation
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Solution Overview
Problem
Traditional elevator installation methods in high-rise buildings require the roof to be closed before installation can begin, limiting construction flexibility and efficiency.
Innovation Solution
A new elevator construction arrangement and method that allows installation to start when the building has reached an agreed height, utilizing a hoistway with protection decks, an installation platform, and a hoist device to install elevators in phases, enabling construction to continue above the operating elevator, with components being moved and extended as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional elevator installation method is used, then installation can start only when the roof is closed, but this limits construction flexibility and increases installation time
Solution Approach 1:
The hoistway is divided into multiple sections (bottom section, intermediate sections, top section) that can be installed and put into service independently. This allows the elevator installation to proceed in phases, with the bottom section operational while upper sections are still under construction, thereby reducing total installation time and increasing construction flexibility.
Solution Approach 2:
The installation platform and protection decks are installed in advance during building construction, enabling the elevator installation to start before the roof is closed. This preliminary preparation allows the elevator system to be installed progressively as the building rises, rather than waiting for the roof to be closed.
2Productivity
If elevator installation starts early during building construction, then installation time is reduced, but safety risks and construction hazards increase
Solution Approach 1:
Protection decks are introduced as intermediary safety structures installed within the hoistway. These decks provide protected working areas and safety barriers for installers operating at height, enabling early installation while mitigating construction hazards and ensuring worker safety.
Solution Approach 2:
The installation platform is designed to be self-supporting and guideable on the car guide rails, providing a stable and safe working base that moves with the construction progress. This self-service platform eliminates the need for external support structures and provides inherent safety as the building rises.
3Adaptability or versatility
If phased installation with protection decks is implemented, then construction flexibility is improved, but device complexity increases
Solution Approach 1:
The installation platform serves multiple functions: it acts as a working platform for installers, a guide rail mounting base, and a movable support structure that travels up the hoistway on the car guide rails. This multi-functionality reduces the need for separate specialized equipment, thereby managing complexity while providing construction flexibility.
Solution Approach 2:
The installation platform is designed to be movable and adjustable, capable of traveling to different positions in the hoistway and adapting to various installation stages. This dynamic design allows the same platform to serve throughout the entire installation process, reducing overall system complexity compared to having multiple fixed structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables earlier completion of elevators, improves site logistics, reduces accidents, and allows construction to proceed efficiently by allowing elevator use during building completion, with phased installation and extension of travel.
Implementation Method 1
a hoist device configured to hoist a working platform in the bottom section and configured to hoist the working platform in hoistway sections above the bottom section
Implementation Method 2
an elevator hoisting machine and a suspension roping arranged to suspend the car and the counterweight during construction time use of the elevator
Implementation Method 3
car guide rails for guiding the car
Data Source
AI summary
An elevator construction arrangement comprises: a hoistway having a bottom section, a top section and optionally at least one intermediate section between the bottom and top sections in a building, an elevator car, a counterweight, car guide rails for guiding the car, counterweight guide rails for guiding the counterweight, an elevator hoisting machine and a suspension roping arranged to suspend the car and the counterweight during construction time use of the elevator, at least one protection deck mounted within the hoistway during elevator installation in a section of the hoistway, an installation platform configured to be guided on car guide rails during installation of at least one hoistway section, a hoist device configured to hoist a working platform in the bottom section and configured to hoist the working platform in hoistway sections above the bottom section, the hoist device preferably comprises a man riding hoist attachable to the car or the installation platform, and a hoist rope attachable to the car or the installation platform and movable with the hoist device during the elevator installation, a hoisting point configured to support the working platform via the hoist device and the hoist rope. During the elevator installation in the bottom section the hoisting point is configured to be mounted to a first protection deck, and the working platform guided on the car guide rails is configured to be used as an installation platform, and after each section elevator installation, the car is during construction time use configured to be moved by the elevator hoisting machine suspending the car and the counterweight together with the suspension roping, and during construction time use of the car, the installation platform is configured to be used as installation platform for an above section installation. A method for installing an elevator during construction of a building.