Soil Moisture Mapping for Earthworks Site Preparation
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Solution Overview
Problem
Current earthworks construction methods face challenges in achieving optimal soil moisture content during site preparation, leading to labor-intensive reworking and reduced economic viability due to the difficulty in discerning suitable moisture levels before soil deposition.
Innovation Solution
A system comprising machines equipped with sensors to measure soil moisture and position data, which generates soil moisture maps to selectively transfer fill soil between cut and fill areas, allowing for automated or guided selection of optimal deposition locations based on real-time moisture content data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If soil moisture content is not monitored before deposition, then the construction process is simpler and faster, but labor-intensive reworking is required to achieve proper moisture content
Solution Approach 1:
The system performs preliminary soil moisture measurement and mapping before soil deposition occurs. Sensors mounted on construction equipment measure moisture content of the native soil in advance, creating a moisture map that guides subsequent earthmoving operations. This preliminary action prevents the need for reworking soil after deposition, as the soil can be selected and placed with appropriate moisture content from the start.
Solution Approach 2:
The system provides real-time feedback on soil moisture content to operators through displays in equipment cabs. As excavation equipment moves through the site, moisture sensors continuously measure soil conditions and transmit this data to operators, enabling them to make immediate decisions about which soil to excavate and where to deposit it. This closed-loop feedback ensures proper moisture content is maintained throughout the construction process.
2Reliability
If soil moisture is measured at the end of construction, then the construction process can proceed without interruption, but substantial reworking consumes manpower and resources
Solution Approach 1:
Instead of waiting until the end of construction to measure soil moisture, the system performs moisture measurement and creates detailed moisture maps during the earthmoving process itself. This preliminary mapping allows operators to see which areas have suitable moisture content before excavation begins, enabling them to selectively remove and replace soil to achieve proper moisture distribution throughout the site.
Solution Approach 2:
The system introduces soil moisture mapping as an intermediary step between soil excavation and deposition. Rather than directly moving soil without knowledge of its moisture content, the moisture map serves as an intermediary information layer that guides operators in making informed decisions about which soil to move and where to place it, ensuring proper moisture content is achieved without extensive reworking.
3Productivity
If moisture content is not discerned before deposition, then the deposition process is faster, but improper moisture content requires labor intensive reworking
Solution Approach 1:
The system performs preliminary moisture measurement and creates a moisture map before any soil deposition occurs. Sensors mounted on excavation equipment measure the moisture content of native soil as it is being removed, and this data is used to create a real-time moisture map that guides the deposition process. This allows operators to ensure proper moisture content is achieved during the initial deposition rather than requiring rework later.
Solution Approach 2:
The system provides immediate feedback to operators about the moisture content of soil being excavated and deposited. Through displays in equipment cabs, operators receive real-time information about moisture levels in different areas, enabling them to make informed decisions about deposition locations and methods to achieve proper moisture content from the start.
4Measurement precision
If soil moisture monitoring equipment is added to the construction system, then moisture content control is improved, but the device complexity increases
Solution Approach 1:
The system uses multi-functional construction equipment that serves both its primary earthmoving function and soil moisture measurement function. Sensors are mounted on existing excavation and grading equipment, allowing these machines to simultaneously perform their traditional soil-moving tasks while also collecting moisture data. This eliminates the need for separate dedicated measurement equipment and integrates moisture monitoring into the existing construction workflow.
Solution Approach 2:
The construction equipment performs its own moisture measurement while carrying out its primary function. The sensors mounted on the equipment measure the moisture content of the soil being excavated and deposited by that same equipment, eliminating the need for separate measurement teams or equipment. The system is self-sufficient, using the construction machinery itself to gather the moisture data needed for informed decision-making.
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 approach reduces the need for end-result testing and rework, improving the quality and efficiency of construction projects by ensuring optimal soil moisture content, thereby minimizing manpower and resource consumption.
Implementation Method 1
at least one sensor mounted on the machine is configured to sense a parameter indicative of a moisture content of the soil
Data Source
AI summary
A soil moisture mapping based method for transferring soil for an earthworks construction project includes outputting signals based on soil moisture data and position data indicative of a location within a cut area or a fill area of the soil. The method further includes selecting a location within a cut area for obtaining fill soil or a location within a fill area for depositing fill soil based on the signals. A system for supplying soil for an earthworks construction project includes at least one machine having a sensor configured to sense soil moisture, and a receiver configured to receive position data corresponding with a location of the soil, and a signaling device configured to output signals based on the position data and soil moisture data. A transfer machine is included in the system and configured to selectively transfer fill soil between the cut area and the fill area based on the signals.