Rectangular Working Well With Sliding Back Wall for Water-Rich Pipe Jacking
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Solution Overview
Problem
Conventional methods for constructing working wells in water-rich strata for non-excavation pipeline construction are hazardous, time-consuming, and costly, with high risks of accidents such as piping and surrounding collapse due to drilling difficulties in water-rich environments.
Innovation Solution
A rectangular working well with a preset pipe jacking hole and a sliding back wall, utilizing thin-walled plain concrete cavities and a sandwich concrete slab wall, along with a construction method that includes designing functional requirements, constructing a caisson, setting a thin concrete wall with a cavity, and using reinforced concrete or steel members, to facilitate safe and efficient pipe jacking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional drilling methods are used to create pipe jacking holes in water-rich strata, then the working well can be constructed, but the construction period is prolonged and the risk of accidents such as piping and surrounding collapse increases
Solution Approach 1:
The patent applies preliminary action by pre-setting the pipe jacking hole within the caisson structure before drilling operations begin. The caisson is constructed with a predetermined hole location and dimensions, allowing the pipe jacking equipment to be directly installed without requiring subsequent drilling operations in the water-rich stratum. This eliminates the time-consuming and hazardous drilling process while maintaining construction safety.
2Adaptability or versatility
If multiple drilling holes are created in one pipe jacking well, then multi-directional pipe jacking is enabled, but the construction becomes even more dangerous and time-consuming
Solution Approach 1:
The patent applies segmentation by dividing the working well into multiple independent caissons, each with its own pre-set pipe jacking hole. Instead of creating multiple holes in a single well, separate caissons are constructed adjacent to each other, allowing multi-directional pipe jacking operations to be performed simultaneously or sequentially without the risks associated with multiple drilling operations in one well.
3Reliability
If sinking or inverted well methods are used for working well construction, then safety and reliability are achieved, but the cost increases and construction period is prolonged
Solution Approach 1:
The patent applies preliminary action by pre-configuring the pipe jacking hole within the caisson during the construction phase. This eliminates the need for time-consuming post-construction drilling operations and allows pipe jacking to begin immediately after caisson installation, significantly improving construction efficiency while maintaining the safety benefits of the sinking method.
Solution Approach 2:
The patent changes the temporal parameter of hole creation from post-construction to pre-construction. By incorporating the pipe jacking hole design into the caisson construction phase rather than creating it afterward through drilling, the overall construction period is shortened while maintaining safety standards.
Data Source
AI summary
A construction method of a rectangular working well includes steps of: (I) designing functional requirements for the rectangular working well; (II) constructing a caisson of an enclosing structure of the rectangular working well; (III) constructing an edge protector; (IV) excavating earthwork of the rectangular working well; (V) forming a bottom cover for the rectangular working well, and pre-embedding a sliding track, a pull ring and a back wall anchor; (VI) installing a ladder for entering the rectangular working well; (VII) preventing joint leakage; (VIII) installing a water-proof pressure plate at an entrance of the preset pipe jacking hole; (IX) constructing the sliding back wall; (X) lifting the sandwich concrete slab wall at a top of the preset pipe jacking hole; and (XI) performing pipe jacking. The structure system constructed by the present invention has many advantages such as clear function, safety, quickness, and flexible design.