Spiral Guide Pipe Grouting Device for Uniform Soil Reinforcement
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Solution Overview
Problem
Existing methods for reinforcing soft foundation soil, such as mechanical rolling, chemical grouting, and cement grouting, face challenges like safety hazards, environmental concerns, and uneven reinforcement, making it difficult to achieve uniform soil reinforcement.
Innovation Solution
A bionic induction type biological grouting device with a spiral guide pipe and adjustable grout spraying holes is used to conduct sectional grouting, allowing for controlled diffusion and distribution of grout, preventing blockages and ensuring uniform reinforcement by using microbial-induced calcium carbonate precipitation (MICP) technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-concentration bacteria liquid is used for MICP grouting, then the grouting efficiency is improved, but calcium carbonate crystals accumulate at the grout outlets causing blockage
Solution Approach 1:
The grouting device segments the grout outlet into multiple spraying holes distributed around the spiral guide pipe, preventing crystal accumulation at a single outlet point. The segmented structure allows grout to be injected through multiple paths, reducing the likelihood of complete blockage and maintaining grouting efficiency while ensuring reliable operation.
Solution Approach 2:
The invention employs a rotatable spiral guide pipe that can rotate during grouting operations. This dynamic capability prevents crystal accumulation by continuously changing the orientation of the spraying holes relative to the soil, ensuring that no single location becomes a persistent blockage point. The rotational movement maintains grout outlet畅通性 while preserving high grouting efficiency.
2Manufacturing precision
If traditional grouting methods are used, then the reinforcement effect is achieved, but the reinforcement is dispersed and uniform reinforcement of the whole soil layer cannot be achieved
Solution Approach 1:
The spiral guide pipe adopts a curved spiral structure that rotates as it penetrates the soil, creating a three-dimensional grouting pattern. This curved geometry enables grout to be injected radially outward through spraying holes positioned along the spiral, achieving uniform distribution throughout the soil layer. The spherical/rotational grouting pattern eliminates dispersed reinforcement while maintaining relatively simple device structure.
3Area of stationary object
If grout spraying holes are increased for better distribution, then the grout diffusion range is enlarged, but the device complexity increases
Solution Approach 1:
The spiral guide pipe serves multiple functions simultaneously: it acts as the grout injection conduit, provides structural support, enables rotation for uniform distribution, and positions multiple spraying holes for radial grout delivery. This multi-functionality allows the device to achieve large grout diffusion range without proportionally increasing device complexity, as one component performs multiple roles.
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 device enables effective, uniform reinforcement of foundation soil by preventing grout blockages and optimizing grout distribution, enhancing soil compactness and mechanical properties while minimizing environmental impact.
Implementation Method 1
MICP technology, which has a wide range of functions and little environmental pollution and rises in recent years, has been gradually applied to the field of reinforcement of bad soil. MICP is that the non-erosive, low-pressure propagation of bacteria liquid and cementing liquid (generally the mixed solution of urea and calcium salt) needed for mineralization and injection into the soil layer. By using the widespread microbial mineralization in the nature, calcium carbonate crystal cemented sand particles are induced to be generated in the soil to improve the compactness of sand and the cementation between sand particles
Implementation Method 2
Bio-mineralization is a natural process, which widely exists in water environment, soil and rock. MICP technology realized by using this process provides a new idea for reinforcing soft soil in civil engineering construction
Implementation Method 3
the spiral guide pipe is used for conducting the sectional type grouting procedure in the rotary propelling process, so that grout is diffused in order in the coverage area of the spiral guide pipe in the soil layer
Implementation Method 4
a plurality of adjusting components for controlling opening and closing of each set of grout spraying holes are arranged in the spiral guide pipe
Data Source
AI summary
The present application discloses a bionic induction type biological grouting device for uniformly reinforcing foundation soil, comprising an operation table, a rotating shaft and a rotating disc, at least two grouting pipes are arranged in a wall of a spiral guide pipe, a plurality of grout outlet holes are formed in an inner wall of the spiral guide pipe, a plurality of sets of grout spraying holes are formed in an outer wall of the spiral guide pipe in a rotation direction of the spiral guide pipe, and a plurality of adjusting components for controlling opening and closing of each set of grout spraying holes are arranged in the spiral guide pipe, and the plurality of adjusting components are linked through a flexible shaft.