Precast Concrete Foundation Anchoring via Solidifying Backfill
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Solution Overview
Problem
Conventional concrete foundation construction methods are time-consuming, prone to errors in finishing accuracy, and costly due to manual on-site assembly and the need for skilled labor and specialized equipment, and existing foundation structures are not suitable for supporting building loads without risking sinking or displacement from external forces.
Innovation Solution
A concrete foundation structure featuring a precast concrete foundation with an excavation hole, a plate-shaped anchor plate, a rod-shaped connecting member, a solidifying backfill portion, and a filler layer, which integrates the foundation with the ground through frictional forces and a projecting portion to prevent movement, allowing for stable and secure anchoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional concrete foundation construction methods are used, then the foundation can be constructed on site, but the construction period becomes long and construction cost increases
Solution Approach 1:
The foundation body is precast in a factory before being transported to the construction site. This preliminary manufacturing action allows the foundation to be ready for installation, eliminating time-consuming on-site concrete pouring and curing processes while maintaining on-site construction capability through assembly of pre-fabricated components.
Solution Approach 2:
The foundation is divided into separate precast components (foundation body, projecting portion) that can be manufactured independently in a factory and then assembled on-site. This segmentation enables parallel production and simplifies on-site installation, reducing overall construction period.
2Adaptability or versatility
If conventional manual construction methods are used, then the foundation can be constructed flexibly, but finishing accuracy is likely to have errors
Solution Approach 1:
The foundation body is precast in a factory where controlled manufacturing conditions enable high precision and consistent finishing quality. This preliminary action transfers the precision-critical work from the variable on-site environment to a controlled factory setting, while maintaining construction flexibility through modular design and on-site assembly capability.
3Reliability
If skilled technicians and specialized vehicles are required, then the foundation construction can be performed, but construction cost increases
Solution Approach 1:
The foundation body is precast in a factory where skilled workers can operate in a controlled environment with proper equipment, ensuring high construction quality. This transfers the complexity of specialized equipment and skilled labor from the on-site construction phase to the factory production phase, reducing on-site equipment requirements and overall construction costs.
4Device complexity
If a simple concrete foundation plate is used, then the construction process is simplified, but the foundation may sink or move under building loads and external forces
Solution Approach 1:
The foundation is segmented into a foundation body and a projecting portion that extends into the ground. This segmentation allows the foundation to engage with the ground at multiple levels, improving stability and preventing sinking or movement while maintaining relatively simple overall structure.
Solution Approach 2:
The foundation structure extends from a single surface level into the vertical dimension by incorporating the projecting portion that goes into the ground. This dimensional extension provides additional anchoring and stability against vertical and horizontal forces without significantly complicating the horizontal footprint or overall structural complexity.
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
The solution provides a stable and secure anchoring of the precast concrete foundation to the ground, resisting external forces and ensuring accurate construction with reduced costs by utilizing pre-fabricated components and on-site solidification, effectively addressing the limitations of existing methods.
Implementation Method 1
a backfill portion formed by backfilling a backfill material including a solidifying material in the excavation hole; and a filler layer formed by filling a filler including the solidifying material between the precast concrete foundation and the backfill portion
Implementation Method 2
the precast concrete foundation and the backfill portion are integrated together, so that the precast concrete foundation can be restrained from moving by a frictional force acting between an outer surface of the backfill portion and an inner surface of the excavation hole
Implementation Method 3
since the projecting portion of the precast concrete foundation is embedded in the ground, the precast concrete foundation can be restrained from moving by the frictional force acting between the projecting portion and the ground
Data Source
AI summary
Provided are a concrete foundation structure capable of firmly fixing a precast concrete foundation to a ground, and a method for constructing the concrete foundation structure. A concrete foundation structure 10 includes a precast concrete foundation 16 having a projecting portion 30 embedded in a ground G. An anchor plate 20 is placed inside an excavation hole 18 formed in the ground G, and the precast concrete foundation 16 and the anchor plate 20 are connected by a connecting member 22. In the excavation hole 18, a backfill portion 24 is formed of a backfill material 94 including a solidifying material and soil. A filler layer 26 is formed of a filler 96 containing a solidifying material between the precast concrete foundation 16 and the backfill portion 24. The precast concrete foundation 16 has a through-hole 42 through which the connecting member 22 is inserted, and the filler 96 forming the filler layer 26 is filled through the through-hole 42.