Detachable-Door Rectangular Working Well for Reusable Pipeline Access
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Solution Overview
Problem
Conventional excavation and construction methods for underground pipelines are inefficient, costly, and pose safety risks, especially when opening the rear door during non-excavation construction and repair of complex urban pipeline networks.
Innovation Solution
An assembled recyclable rectangular working well with a preset detachable door opening is designed and constructed using a method that includes pre-processing and on-site assembly of supporting piles, prefabricated crown beams, and efficient recycling of components, allowing for safe, quick, and cost-effective construction and reuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional excavation and landfill construction method is used, then construction can be completed, but construction efficiency is low and post-construction settlement occurs
Solution Approach 1:
The working well structure is divided into multiple detachable components including well body segments, supporting piles, and door assemblies. These segmented components can be assembled and disassembled separately, enabling efficient recycling while maintaining structural integrity during construction, thus improving productivity without compromising reliability
Solution Approach 2:
The patent implements a recovery system where working well components are retrieved and reused after serving their temporary purpose in pipe jacking operations. The detachable door openings and modular well structures are specifically designed for easy disassembly and reuse, eliminating waste and reducing construction costs while maintaining consistent quality across multiple projects
2Reliability
If sinking process or inverted well process is used for working wells, then safety and reliability are ensured, but construction cost is high and construction period is long
Solution Approach 1:
The working well components including well bodies, supporting piles, and door assemblies are pre-fabricated off-site before construction. This preliminary preparation allows for quality control and safety standards to be met during manufacturing, while significantly reducing on-site construction time and costs compared to traditional sinking or inverted well methods
Solution Approach 2:
The patent uses standardized, repeatable component designs that can be copied and reused across different projects. The modular well structures and door assemblies serve as templates that maintain safety and reliability standards while reducing construction period through repetition rather than custom fabrication each time
3Reliability
If sinking process is used for working wells, then safety is ensured, but construction cost is high and construction period is long, and there exists problem of sinking difficulty and risks of tilts and instability accidents
Solution Approach 1:
The working well is divided into multiple detachable segments and components that can be assembled in controlled conditions. This segmentation eliminates the complexity and risks associated with sinking operations, as components are simply assembled rather than sunk into the ground, while maintaining safety through proper structural design and connection mechanisms
Solution Approach 2:
The patent replaces the mechanical sinking process with an assembly-based construction method. Instead of using heavy machinery to sink wells into the ground, pre-fabricated components are assembled in place, eliminating sinking difficulties and risks of tilts and instability while maintaining structural safety through engineered connections
4Stability of the object's composition
If conventional post-opening door openings are designed and implemented synchronously with working well structure, then structural integrity is maintained, but construction is difficult and time-consuming
Solution Approach 1:
The door openings are designed as separate detachable components rather than being integrated into the main well structure. This segmentation allows doors to be installed independently after the well body is in place, maintaining structural integrity of the well while significantly speeding up construction by eliminating the need to form door openings during the main pouring process
Solution Approach 2:
Door components are pre-fabricated separately and prepared in advance before installation into the working well. This preliminary preparation allows for quality control and simplifies on-site installation, maintaining structural integrity through proper connection design while reducing construction time compared to forming and pouring door openings synchronously with the well structure
5Reliability
If working wells are constructed for non-excavation construction of underground pipelines, then safe working space is provided, but construction cost and time are high with conventional methods
Solution Approach 1:
The working well components are designed for retrieval and reuse after completing their temporary function in pipe jacking operations. This recovery and reuse capability dramatically reduces construction costs and time for multiple projects while maintaining safety standards, as the same quality components are reused rather than constantly constructing new wells
Solution Approach 2:
The modular working well components are designed with universal applicability across different pipe jacking projects. The standardized well bodies, supporting piles, and door assemblies can serve multiple functions and locations, reducing overall construction time and cost by eliminating the need to design and build unique wells for each project while maintaining safety through consistent design standards
Data Source
AI summary
A method for constructing an assembled recyclable rectangular working well with preset detachable door openings comprises steps of: (I) designing according to functional requirements for a rectangular working well; (II) constructing by supporting piles; (III) installing prefabricated top beam; (IV) edge protection construction; (V) alternate construction of earthwork excavation, retaining slabs and internal support breast beams; (VI) installing the ladder entering the rectangular working well; (VII) rectangular working well back cover; (VIII) demolition of the detachable subsection support piles in the door part and completing the construction of the assembled recyclable rectangular working well in the preset detachable door hole; (IX) after the operation in the well is completed, during the backfilling process of the rectangular working well, gradually recovering the working well components such as the retaining slab, the internal support girder, the prefabricated crown beam and the supporting piles.