Underground Structure Construction Sequencing for Heavy-Object Access
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Solution Overview
Problem
Existing construction methods for underground structures face temporal and spatial restrictions due to the need to accommodate heavy objects during construction, leading to interference and hindered travel routes.
Innovation Solution
A construction method where the lower structure part is built below ground, allowing heavy objects to travel on a temporary route that affects the construction area, followed by building the upper structure part after the heavy object has passed, using mechanical joints for reinforcement and temporary lids for cavities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the underground structure is constructed before the heavy object travels, then the structure can be built in advance, but the heavy object's travel route is hindered by protruding parts
Solution Approach 1:
The structure is divided into an underground portion and an above-ground portion. Only the underground portion is constructed before heavy object travel, while the above-ground portion is constructed after travel. This segmentation allows the heavy object to travel over the site without being hindered by protruding structure parts, while still enabling advance construction of the critical underground foundation elements.
Solution Approach 2:
The underground structure is constructed in advance (preliminary action) before the heavy object travels. This preliminary construction of the foundational elements below ground level prepares the site for subsequent heavy object placement without interfering with the travel route, as the above-ground portions are left for later construction after travel occurs.
2Ease of operation
If the underground structure is constructed after the heavy object travels, then the travel route is not hindered, but construction work and structure construction mutually affect each other
Solution Approach 1:
The construction process is segmented into two phases: underground structure construction before heavy object travel, and above-ground structure construction after travel. This temporal and spatial segmentation eliminates mutual interference between construction activities and heavy object travel, while ensuring the underground foundation is already in place to provide stability for subsequent construction operations.
Solution Approach 2:
The underground foundation and structural elements are constructed in advance before the heavy object is placed on the site. This preliminary action ensures that the critical load-bearing components are already established and stabilized, providing a reliable foundation that will not be affected by subsequent construction activities or heavy object placement.
3Ease of manufacture
If the underground structure protrudes to the ground, then construction can be completed, but the heavy object cannot travel on the route
Solution Approach 1:
The structure has different qualities at different locations: the underground portions are constructed to provide structural support, while the above-ground portions are left unconstructed or minimally constructed during the travel phase. This local differentiation allows the heavy object to travel freely over areas where above-ground structure does not protrude, while the underground structure continues to provide necessary support.
Solution Approach 2:
The structure is segmented into underground and above-ground portions with different construction timelines. The underground portion is constructed complete with all necessary structural elements, while the above-ground portion is either not constructed yet or constructed in a manner that does not impede heavy object travel. This segmentation resolves the conflict between complete construction and travel accessibility.
Data Source
AI summary
A construction method of a structure provided with a lower structure part entirely arranged below a ground surface and an upper structure part at least a part of which is arranged below the ground surface on the lower structure part, the construction method including a step of constructing the lower structure part below the ground surface, a step of allowing a heavy object to travel on a travel route including a range that affects the lower structure part after the lower structure part is constructed, and a step of constructing the upper structure part on the lower structure part after the heavy object is allowed to travel.