In-Situ Sludge Solidification with Deep-Shallow Multi-Point Curing
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Solution Overview
Problem
Current in-situ sludge stabilization technologies face inefficiencies in operation, inconsistent and unpredictable solidification, limited depth of stabilization, and difficulties in stabilizing deep sludge areas, leading to prolonged project durations and uneven solidification.
Innovation Solution
A novel in-situ sludge stabilization device with a deep bi-directional cutting and curing device and an upward floating drive-curing device, enabling simultaneous formation of deep vertical and shallow horizontal stabilization bodies, ensuring uniform solidification and load-bearing integrity through automated, multi-point grouting and stirring, and allowing for adjustable depth and density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation of mixing head is used, then equipment can be operated with simple structure, but insertion depth and angle become variable leading to insufficient mixing coverage
Solution Approach 1:
The mixing head is equipped with automatic depth control mechanisms and multiple injection ports that automatically adjust to maintain consistent insertion depth and mixing coverage, eliminating the variability introduced by manual operation while keeping the overall system relatively simple
Solution Approach 2:
The mixing head is divided into multiple independent injection ports distributed at different positions, allowing each port to contribute to comprehensive mixing coverage and ensuring uniform stabilization even when insertion depth varies slightly
2Device complexity
If single slurry injection port is used, then device structure is simple, but mixing and injection duration at various depths is restricted leading to uneven depth coverage
Solution Approach 1:
The slurry injection system is segmented into multiple injection ports positioned at different depths and angles on the mixing head, allowing simultaneous injection at various depths to achieve uniform depth coverage without significantly increasing device complexity
Solution Approach 2:
The injection system transitions from a single-point injection to multi-point injection in three-dimensional space, with ports arranged at different heights and angles to cover the entire sludge depth uniformly
3Reliability
If metal plates are placed to increase contact area, then excavator sinking is prevented, but repositioning plates for expansion reduces efficiency
Solution Approach 1:
The support structure transitions from static metal plates that require repositioning to a dynamic system where the stabilization device itself can move and adapt, maintaining contact area and stability without requiring plate repositioning during expansion
Solution Approach 2:
The stabilization device integrates both stabilization function and mobility function, allowing it to provide support like metal plates while also being easily repositioned for area expansion, combining the benefits of both approaches
4Device complexity
If excavator arm length and mixing head cutting capability are limited, then equipment structure remains simple, but only shallow stabilization less than 3 meters can be achieved
Solution Approach 1:
The stabilization process is segmented into multiple passes or stages, with the mixing head making repeated insertions at different positions to progressively achieve deeper overall stabilization without requiring a single excessively long arm or cutting head
Solution Approach 2:
The approach transitions from attempting to reach maximum depth in a single insertion to achieving depth through multiple insertions in the horizontal dimension, collectively covering the required stabilization depth
5Reliability
If two separate stabilization phases are used, then deep sludge areas can be stabilized, but project duration is extended and efficiency is reduced
Solution Approach 1:
The shallow stabilization and deep stabilization processes are merged into a single integrated operation, where the mixing head performs both functions simultaneously during one construction phase, eliminating the need to wait for hard shell layer strength development
Solution Approach 2:
The stabilization process becomes continuous without interruption or waiting periods between phases, as the equipment can immediately proceed from shallow to deep stabilization or perform both concurrently, maintaining productive action throughout
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
Achieves comprehensive, uniform, and efficient sludge stabilization with reduced construction time, enhanced depth, and improved load-bearing capacity, eliminating the need for manual handling and separate stabilization phases.
Implementation Method 1
direct on-site mixing of stabilizers with sludge
Implementation Method 2
equipped with a slurry spraying device that dispenses stabilizers during the mixing process
Data Source
AI summary
The invention discloses a device for in-situ sludge solidification and a comprehensive solidification method, which include a main control transmission chamber, an upward floating drive-curing device, a deep bi-directional cutting and curing device, a control end, external grouting pipe, a grouting source, and a slurry pump. The solidification device is characterized by high efficiency and the fact that it does not require additional equipment or methods. The solidification method enables various forms of deep, shallow, and combined deep-shallow in-situ solidification based on the field conditions of the sludge. This device and method address several issues with existing in-situ sludge solidification technologies, which are typically limited to shallow solidification, struggle to independently support deep and thick sludge areas after solidification, exhibit low efficiency, uneven solidification, and often require the use of additional equipment and processes. This invention allows for rapid and efficient large-area in-situ solidification of sludge.