Two-Row Earth Retaining Wall Tension Application
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Solution Overview
Problem
Conventional earth-retaining methods face challenges in effectively applying tensile force to piles, requiring complex structures and high construction costs, which complicates the stability and height of self-supporting earth retaining walls, especially in soft ground conditions.
Innovation Solution
A two-row self-supporting earth retaining wall structure is designed with rear and front piles, waling members, and guide brackets to directly apply tension to the waling members, improving their bearing capacity against soil pressure and enhancing the stability of the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional earth-retaining methods are used, then the structure can retain soil, but it is difficult to effectively apply tensile force to the pile
Solution Approach 1:
The patent introduces a tensile member as an intermediary element that connects the pile to the waling member. This tensile member directly transmits tensile force from the soil pressure acting on the waling member to the pile, effectively solving the problem of difficult force application. The guide bracket serves as another intermediary that ensures the tensile member is properly positioned and oriented to transmit force efficiently.
Solution Approach 2:
The earth-retaining structure is divided into distinct functional components: piles for deep anchorage, waling members for distributing soil pressure, tensile members for force transmission, and guide brackets for directional control. This segmentation allows each component to be optimized for its specific function, particularly enabling effective tensile force application through the dedicated tensile member-pile connection.
2Force
If complex structures are used to apply tensile force to the pile, then force application may be achieved, but construction cost increases
Solution Approach 1:
The guide bracket performs multiple functions: it positions the tensile member, directs the force transmission path, and connects the waling member to the pile system. This multi-functionality reduces the need for additional specialized components, thereby lowering construction cost while maintaining effective force application capability.
Solution Approach 2:
The tensile member automatically aligns and positions itself through the guide bracket during installation, reducing the need for complex adjustment mechanisms or skilled labor for precise positioning. The structure essentially configures itself during construction, simplifying the manufacturing and installation process.
3Ease of manufacture
If self-supporting earth retaining methods are used, then construction cost is reduced, but excavation height and stability are limited especially in soft ground
Solution Approach 1:
The tensile members are pre-installed and positioned using the guide brackets before the final excavation stages. This preliminary action ensures that the force transmission path is established in advance, allowing the piles to immediately resist tensile forces as soil pressure increases during excavation, thereby enhancing stability from the outset in soft ground conditions.
Solution Approach 2:
The guide bracket acts as a mediator that ensures optimal force transmission from the waling member through the tensile member to the pile. This intermediary component guarantees that the full benefit of the self-supporting structure is realized, maximizing stability while maintaining cost-effectiveness in challenging soft ground conditions.
4Ease of manufacture
If self-supporting earth retaining methods are used, then construction cost is reduced, but excavation height is limited
Solution Approach 1:
The structure incorporates dynamic elements including the tensile members that can elongate and the guide brackets that can be positioned at different heights. This dynamic capability allows the system to accommodate increasing excavation depths by adjusting the tension and positioning of components, thereby increasing excavation height while maintaining the cost-effective self-supporting approach.
Data Source
AI summary
A two-row self-supporting earth retaining wall structure includes an upper displacement restraining tea structure and an excavated subsoil passive resistance block body. Piles having a two-row structure, waling members, and guide brackets, which are improved in shape, may be used to directly apply tension to the rear waling member and the front waling members, thereby improving bearing capacity of the waling members due to an earth pressure of backfill soil and improving stability of the two-row self-supporting earth retaining temporary structure. In addition, since the front pile is disposed to be spaced a predetermined distance from the rear pile, the gravity retaining wall may be provided between the front pile and the rear pile, and the gravity retaining wall may further improve the stability of the two-row self-supporting earth retaining temporary facility while supporting the backfill earth pressure between the front piles and the rear piles.