Prefabricated Splicing Wall for Deep Pit Stability
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Solution Overview
Problem
Traditional methods for constructing deep, large, and long pit structures face high construction costs, inefficiencies in soil excavation, and stability issues due to deep continuous walls, weak joints, and inadequate reinforcement, leading to potential water leakage and environmental impacts.
Innovation Solution
An inverse construction method employing one-column-one-pile engineering, prefabricated splicing-type wall boards, high-pressure grouting, and a frame-type supporting floor-slab structure with prefabricated components, allowing for efficient assembly and reduced material and labor costs, while ensuring stability and minimizing environmental effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the continuous wall depth is increased to prevent water seepage and ensure stability, then the waterproofing and stability are improved, but the construction cost increases and the construction quality deteriorates due to weak joints
Solution Approach 1:
The continuous wall is divided into multiple prefabricated wall sections that are assembled on-site. Each section is manufactured with standardized connections, allowing for better quality control of joints compared to monolithic cast-in-place construction. The segmentation enables precise manufacturing of connection details while maintaining the overall continuity of the waterproof wall.
Solution Approach 2:
The wall sections are pre-fabricated off-site with predetermined connection methods and waterproofing measures. This preliminary action allows for optimized joint design and manufacturing under controlled conditions, improving joint quality before on-site assembly. The pre-fabrication includes preparation of connection surfaces, embedding of waterproof layers, and pre-installation of reinforcement elements at joint locations.
2Stability of the object's composition
If the continuous wall depth is increased to meet stability requirements, then the pit stability is improved, but the construction time increases and productivity decreases
Solution Approach 1:
The deep continuous wall is segmented into multiple prefabricated sections that can be manufactured simultaneously in parallel. This segmentation enables concurrent production of wall sections while the site prepares for installation, significantly reducing the overall construction time compared to monolithic construction of deep walls.
Solution Approach 2:
Wall sections are pre-fabricated off-site before on-site installation. This preliminary action allows for parallel processing of wall manufacturing and site preparation activities, improving construction productivity. The pre-fabricated sections are then rapidly assembled on-site, reducing the time-consuming process of formwork installation and concrete pouring for deep walls.
3Ease of manufacture
If traditional inverse construction method is used for soil excavation, then the construction method is simple, but the soil excavation efficiency is low and construction time is extended
Solution Approach 1:
The foundation piles are constructed before the wall sections are installed. This preliminary action creates a ready-to-receive structure that enables more efficient subsequent wall installation and soil excavation operations. The pre-installed piles provide immediate support and positioning references, streamlining the overall construction process.
Solution Approach 2:
The construction process is segmented into distinct phases: foundation pile construction, wall section fabrication, wall assembly, and soil excavation. This segmentation allows for optimized sequencing of operations, improving soil excavation efficiency by conducting it during the most favorable time windows while maintaining construction simplicity through clear phase delineation.
4Area of stationary object
If the pit area is enlarged to accommodate larger underground projects, then the project scale is increased, but the construction cost and time increase proportionally
Solution Approach 1:
The large pit enclosure is divided into multiple standardized wall sections that can be manufactured in parallel and assembled systematically. This segmentation enables modular construction that scales efficiently with pit size, reducing the proportional increase in construction time compared to traditional monolithic methods.
Solution Approach 2:
Wall sections are pre-fabricated off-site before on-site assembly. This preliminary action allows for parallel processing of multiple wall sections simultaneously, significantly reducing the cumulative construction time for large pit areas. The pre-fabrication enables optimized logistics and sequencing of assembly operations.
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
This method significantly reduces construction time and costs, enhances pit stability, and improves environmental protection by optimizing soil excavation efficiency and reducing waste, while maintaining effective waterproofing and deformation control.
Implementation Method 1
injecting a grouting material at a high pressure to form a waterproof layer
Implementation Method 2
one-column-one-pile construction is adopted in the pit, wherein the one-column-one-pile refers to an integrated structure of a column pile and an engineering pile
Implementation Method 3
grooves are bored and a continuous wall is formed by mutually assembling splicing-type prefabricated wall boards
Implementation Method 4
a frame-type supporting floor-slab structure with prefabricated components, allowing for efficient assembly and reduced material and labor costs, while ensuring stability
Data Source
AI summary
The present invention relates to the field of construction of underground buildings, specifically to an inverse construction method for a deep, large and long pit assembling structure of a suspension-type envelope enclosure. A method includes design and calculation; engineering construction of foundation piles; control over underground water; construction of a pit enclosure; building of a basement reinforcing and anti-seeping layer; inverse construction; and floor structure construction. By the inverse construction method for a deep, large and long pit assembling structure of a suspension-type envelope enclosure of the present invention, the pit construction quality is easily controlled, the basement is well waterproofed and easily monitored, and the quality control, service and maintenance are easy.