Fluidic solidified soil tamping-free compaction pile composite foundation treatment method

Abstract

The invention discloses a fluid stabilized soil compaction-free compaction pile composite foundation treatment method, and relates to the technical field of soil pollution control and governance, which comprises the following steps: while the quality is controllable in compaction pile construction, preparing fluid stabilized soil, absorbing building and industrial solid wastes, and forming a pile body by adopting pressure perfusion of the fluid stabilized soil, so as to form a compaction pile body; the difficult problem of compaction pile forming in a sand inclusion, large-thickness and high-saturation-degree field with the maximum treatment depth of 30 meters is solved, and in-situ long-acting locking of pollutants is achieved; the safety, the repairing efficiency and the engineering applicability of foundation treatment are improved, and the engineering applicability of compaction is widened.

Description

Technical Field

[0001] This invention relates to the field of soil pollution control and remediation technology, and in particular to a method for treating a composite foundation of fluidized solidified soil without compaction piles. Background Technology

[0002] With the continuous acceleration of urbanization and the ongoing expansion of infrastructure construction, land resources are becoming increasingly scarce. A large number of industrial waste sites and contaminated sites urgently need to be safely reused. Against this backdrop, soil pollution has become one of the key bottlenecks restricting sustainable development, posing a potential threat to the ecological environment and public health. It is necessary to promote the rapid development and engineering application of contaminated site remediation technologies, and there is an urgent need for new foundation treatment technologies that combine structural load-bearing capacity with pollution control capabilities.

[0003] For contaminated areas requiring foundation treatment, a composite foundation technology is provided that simultaneously achieves in-situ consolidation of pollutants and prevents the spread of construction disturbance while meeting the requirements for bearing capacity and settlement control. The soil improvement is concentrated inside the pile body and in the micro-area of ​​the interface, which is a functional and passive barrier control rather than an active deep remediation.

[0004] Currently, in foundation treatment engineering for contaminated sites, traditional compaction piles or solidified soil piles rely heavily on high-disturbance processes such as dynamic compaction and vibratory pipe driving. These processes not only easily cause pollutant diffusion and migration but also make it difficult to form a continuous and stable solidified body in soft or high-moisture contaminated soil layers. At the same time, conventional solidification materials lack the ability to effectively solidify or stabilize heavy metals or organic pollutants, resulting in the risk of secondary pollution in the remediated foundation. These defects limit the safe application of traditional foundation treatment methods in contaminated sites. Summary of the Invention

[0005] In view of the problems existing in the existing methods for treating composite foundations of fluidized solidified soil without compaction piles, this invention is proposed.

[0006] Therefore, the problem to be solved by this invention is: how to form a composite foundation in soft or high-moisture-content contaminated soil layers that has both structural bearing capacity and long-term solidification and stabilization function of pollutants, while avoiding the migration of pollutants caused by construction disturbance.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] In a first aspect, embodiments of the present invention provide a method for treating a composite foundation of fluidized solidified soil without compaction piles, which includes constructing a composite foundation system to enable it to solidify pollutants, and injecting fluidized solidified slurry into the composite foundation system;

[0009] After the injected fluidized solidified slurry is used to form a non-compacting compaction pile, the non-compacting compaction pile can be used to fix pollutants for a long time.

[0010] By controlling the two-stage setting time of the fluidized solidified slurry, pollutants are simultaneously induced to react with the components of the fluidized solidified slurry during the solidification process of the compaction pile, forming a pollutant immobilization microstructure inside the compaction pile and constructing a composite foundation system with pollutant control capabilities.

[0011] As a preferred embodiment of the fluidized solidified soil non-compacted compaction pile composite foundation treatment method of the present invention, wherein: the construction of the composite foundation system includes designing and preparing fluidized solidified slurry based on the physicochemical properties of the contaminated soil layer and the type of pollutants on site;

[0012] The fluidized solidified slurry comprises functional composite slurry components. Piles are formed in contaminated soil layers using a vibration-free drilling process. The functional composite slurry components and the contaminated soil layers have an in-situ synergistic relationship, which includes a targeted adaptation relationship and an in-situ reaction-solidification coupling relationship.

[0013] After the hole is formed or during the process, the fluidized solidified grout is injected into the pile hole through bottom grouting or segmented grouting. Under the action of its own weight and the lateral pressure of the surrounding soil, the fluidized solidified grout naturally expands and flexibly compacts the surrounding soil containing pollutants, ensuring that the pollutants do not migrate or spread due to construction disturbance.

[0014] As a preferred embodiment of the fluidized solidified soil non-compacted compaction pile composite foundation treatment method of the present invention, wherein: the targeted adaptation relationship is used to design the formulation of functional composite grout components according to the type and concentration level of pollutants in the contaminated soil layer and the physical and chemical properties of the soil;

[0015] When the contaminated soil layer is mainly composed of heavy metals, a heavy metal chelating agent is introduced into the functional composite grout.

[0016] When organic pollutants are the main pollutants, supported catalytic degradation components are selected to ensure that the functional composite slurry components can interact with the target pollutants in the contaminated soil layer.

[0017] The in-situ reaction and solidification coupling relationship includes the fact that when the fluidized solidified slurry is injected into the pile hole, the components of the fluidized solidified slurry participate in the formation of the structure of the non-compacted compaction pile, and at the same time, an in-situ reaction occurs with the interface of the contaminated soil layer and the local soil that is squeezed in.

[0018] When heavy metal ions are chelated and fixed, and organic pollutants are adsorbed or catalytically decomposed, they are encapsulated in a low-permeability solidification matrix. At this time, the functional composite slurry components do not exist in isolation, but actively intervene in the remediation process of contaminated soil layers, completing the integration of foundation reinforcement and pollution control.

[0019] As a preferred embodiment of the fluidized solidified soil compaction pile composite foundation treatment method of the present invention, the injection of fluidized solidified grout into the composite foundation system includes using a bottom-retreating grouting pipeline system in the pile hole that has been completed without vibration. The bottom-retreating grouting pipeline system is composed of a hollow self-drilling grouting drill rod and an adjustable bottom one-way valve to ensure that the fluidized solidified grout is filled from the bottom of the pile hole upwards in sections, avoiding segregation or floating of the fluidized solidified grout in the high water content contaminated soil layer.

[0020] During the grouting process of injecting fluidized solidified grout, the grouting pressure is dynamically adjusted according to the permeability and lateral pressure distribution of the contaminated soil layer. Combined with real-time monitoring of grout return from the pile hole during vibration-free drilling, the grouting rate is controlled so that the fluidized solidified grout can expand uniformly under its own weight and the lateral constraint of the surrounding contaminated soil.

[0021] Segmented isolation rings are set up along the grouting path to divide the pile hole into several grouting units along the depth. In response to the differences in pollutant types in soil layers at different depths, fluidized solidified grout with differentiated functions is injected into several grouting units to form a gradient solidification structure with targeted pollutant response in the vertical direction.

[0022] The process of injecting the fluidized solidified grout into the composite foundation system is carried out under closed or semi-closed conditions. The grouting pipeline and orifice under the grouting pipeline system are equipped with sealing and grout-stopping devices to prevent the fluidized solidified grout from overflowing and the migration of pollutants caused by pore air pressure disturbance, thus completing the injection of the fluidized solidified grout.

[0023] As a preferred embodiment of the fluidized solidified soil non-compaction compaction pile composite foundation treatment method of the present invention, the non-compaction compaction pile body includes maintaining the pile hole in a closed state after the fluidized solidified grout is injected to avoid external disturbance, so that the grout can be naturally stabilized by its own weight settlement and the lateral constraints provided by the surrounding contaminated soil under the conditions of no external vibration and no tamping load.

[0024] During the natural stabilization process under lateral constraints, the fluidized solidified slurry of the composite slurry components with different functions inside the slurry undergoes a hydration reaction to form a fluidized solidified slurry solidified body, which refers to a compaction pile body without tamping.

[0025] The long-term fixation of pollutants includes utilizing hydration reactions and constructing a multi-scale stable system with pollutant-fixed microstructures as the core within the non-compacted pile body. The pollutant-fixed microstructures are composed of chemically bonded phases, physically adsorbed phases, and low-permeability barrier phases, which lock in pollutants under long-term service conditions, thus achieving long-term fixation of pollutants.

[0026] As a preferred embodiment of the fluidized solidified soil compaction pile composite foundation treatment method of the present invention, the two-stage setting sequence includes an initial setting time window and a final setting time window. The formation of the two-stage setting sequence includes introducing a composite regulation system of a retarding regulator and a setting trigger into the functional composite slurry component during the fluidized solidified slurry preparation stage. The retarding regulator is an organophosphonate or a sugar derivative, used to delay the initial reaction rate of cement hydration and control the initial setting time window.

[0027] The coagulation trigger is a nano-crystal seed or soluble aluminum salt, which is activated at a preset time point or under changes in ambient pH, thereby concentrating the final coagulation time window and forming a controllable two-stage coagulation sequence.

[0028] The solidification process of the non-compacted compaction pile body includes the control of the initial setting time window and the final setting time window, so that the grout maintains sufficient fluidity before the initial setting time window, so as to penetrate into the micropores of the contaminated soil around the pile body and come into contact with the pollutant molecules or ions that diffuse in.

[0029] Once the initial setting time window is reached, the viscosity of the slurry increases, which restricts the migration of pollutants and simultaneously activates the exposure of active sites of heavy metal chelating agents or catalytic degradation components.

[0030] Once the final setting time window is reached, hydration products are generated and encapsulate the bound pollutants, promoting the synchronous development of chemically bonded phases, physically adsorbed phases, and low-permeability barrier phases inside the pile, jointly constructing a microstructure for pollutant immobilization.

[0031] As a preferred embodiment of the fluidized solidified soil compaction pile composite foundation treatment method of the present invention, the construction of a composite foundation system with pollutant control capability includes matching the spatial distribution of pollutant immobilization microstructures with the pollutant concentration gradient. In the outer pollution interface area of ​​the pile body, the pollutant immobilization microstructures are mainly composed of density adsorption phase and rapid chelation phase. In the inner pollution interface area of ​​the pile body, a pollutant locking system with functional gradient from the outside to the inside is formed, thus completing the construction of a composite foundation system with pollutant control capability.

[0032] Secondly, embodiments of the present invention provide a multi-source power grid information fusion system based on the Internet of Things, comprising: a pollutant solidification composite foundation construction module, which constructs a composite foundation system to enable pollutant solidification and injects fluidized solidified slurry into the composite foundation system; a non-compacting compaction pile forming and long-term pollutant fixation module, which forms non-compacting compaction piles after injecting the fluidized solidified slurry and uses the non-compacting compaction piles to fix pollutants for a long time; and a two-stage coagulation timing control and pollutant fixation microstructure construction module, which controls the two-stage coagulation timing of the fluidized solidified slurry and simultaneously induces pollutants to react with the components of the fluidized solidified slurry during the solidification process of the non-compacting compaction piles, forming a pollutant fixation microstructure inside the non-compacting compaction piles, thereby constructing a composite foundation system with pollutant control capabilities.

[0033] Thirdly, embodiments of the present invention provide a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement any step of the above-described method for treating composite foundations of fluidized solidified soil without compaction piles.

[0034] Fourthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, it implements any step of the above-described method for treating composite foundations of fluidized solidified soil without compaction piles.

[0035] The beneficial effects of this invention are as follows: This invention effectively solves the technical problems of traditional high-disturbance construction processes in contaminated sites, which easily lead to the diffusion and migration of pollutants and make it difficult to form a stable solidified body, by constructing a fluidized solidified soil non-compacted compaction pile composite foundation treatment method. This method uses vibration-free, non-dynamic compaction static pressure or self-drilling grouting pile forming process, avoiding disturbance to the contaminated soil and preventing secondary pollution. Simultaneously, the functional composite grout material components customized based on the characteristics of the contaminated soil layer can chelate, adsorb, or catalytically degrade heavy metals or organic pollutants during the pile solidification process. Through two-stage coagulation timing control, it precisely constructs a pollutant immobilization microstructure composed of a chemically bonded phase, a physically adsorbed phase, and a low-permeability barrier phase, achieving in-situ long-term locking of pollutants. The final non-compacted compaction pile body and the soil between the piles together constitute a composite foundation system with both high bearing capacity and pollution control capabilities, suitable for complex contaminated sites such as soft and high-moisture-content areas, significantly improving the safety, remediation efficiency, and engineering applicability of foundation treatment. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0037] Figure 1 This is a flowchart of a method for treating a composite foundation of fluidized solidified soil without compaction piles, provided in an embodiment of the present invention.

[0038] Figure 2 This is a schematic diagram of a method for treating a composite foundation of fluidized solidified soil without compaction piles, provided in an embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the structure of a medium in a fluidized solidified soil non-compaction pile composite foundation treatment method provided in an embodiment of the present invention.

[0040] Figure 4 This is a schematic diagram of the structure of a computing device for a method of treating a composite foundation of fluidized solidified soil without compaction piles, provided in an embodiment of the present invention. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0043] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0044] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0045] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Example

[0048] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a method for treating a composite foundation of fluidized solidified soil without compaction piles, comprising:

[0049] S1: Construct a composite foundation system to enable pollutant solidification, and inject the fluidized solidified slurry within the composite foundation system.

[0050] Among them, the construction of a composite foundation system includes designing and preparing a fluidized solidified slurry based on the physicochemical properties of the contaminated soil layer and the type of pollutants on site.

[0051] The fluidized solidified slurry consists of functional composite slurry components. Piles are formed in contaminated soil layers using a vibration-free drilling process. There is an in-situ synergistic relationship between the functional composite slurry components and the contaminated soil layer. The in-situ synergistic relationship includes a targeted adaptation relationship and an in-situ reaction and solidification coupling relationship.

[0052] After the hole is formed or during the process, the fluidized solidified grout is injected into the pile hole through bottom grouting or segmented grouting. Under the action of its own weight and the lateral pressure of the surrounding soil, the fluidized solidified grout naturally expands and flexibly compacts the surrounding soil containing pollutants, ensuring that the pollutants do not migrate or spread due to construction disturbance.

[0053] S1.1: Targeted adaptation relationship is used to design the formulation of functional composite grout components according to the type and concentration level of pollutants in the contaminated soil layer and the physical and chemical properties of the soil.

[0054] When the contaminated soil layer is mainly composed of heavy metals, a heavy metal chelating agent is introduced into the functional composite grout.

[0055] When organic pollutants are the main pollutants, supported catalytic degradation components are selected to ensure that the functional composite slurry components can interact with the target pollutants in the contaminated soil layer.

[0056] The coupling relationship between in-situ reaction and solidification includes the fact that when the fluidized solidified grout is injected into the pile hole, the components of the fluidized solidified grout participate in the formation of the structure of the compaction pile without tamping, and at the same time, in-situ reaction occurs at the interface with the contaminated soil layer and the local soil that is squeezed in.

[0057] When heavy metal ions are chelated and fixed, and organic pollutants are adsorbed or catalytically decomposed, they are encapsulated in a low-permeability solidification matrix. At this time, the functional composite slurry components do not exist in isolation, but actively intervene in the remediation process of contaminated soil layers, completing the integration of foundation reinforcement and pollution control.

[0058] S1.2: Injecting the fluidized solidified grout into the composite foundation system includes using a bottom-retreating grouting pipeline system in the pile holes that have been completed without vibration drilling. The bottom-retreating grouting pipeline system consists of a hollow self-drilling grouting drill rod and an adjustable bottom one-way valve to ensure that the fluidized solidified grout fills the pile hole section by section from the bottom upwards, avoiding segregation or floating of the fluidized solidified grout in the high water content contaminated soil layer.

[0059] During the grouting process of injecting fluidized solidified grout, the grouting pressure is dynamically adjusted according to the permeability and lateral pressure distribution of the contaminated soil layer. Combined with real-time monitoring of grout return from the pile hole during vibration-free drilling, the grouting rate is controlled so that the fluidized solidified grout can expand uniformly under its own weight and the lateral constraint of the surrounding contaminated soil.

[0060] Segmented isolation rings are set up along the grouting path to divide the pile hole into several grouting units along the depth. In response to the differences in pollutant types in soil layers at different depths, fluidized solidified grout with differentiated functions is injected into several grouting units to form a gradient solidification structure with targeted pollutant response in the vertical direction.

[0061] The process of injecting the fluidized solidified grout into the composite foundation system is carried out under closed or semi-closed conditions. The grouting pipeline and orifice under the grouting pipeline system are equipped with sealing and grout-stopping devices to prevent the fluidized solidified grout from overflowing and the migration of pollutants caused by pore air pressure disturbance, thus completing the injection of the fluidized solidified grout.

[0062] Furthermore, a composite foundation system is constructed to enable pollutant solidification. A fluidized solidified slurry is injected into the composite foundation system. Specifically, the process is detailed as follows: First, an in-situ investigation is conducted on the contaminated site to obtain information on the depth distribution, moisture content, permeability, pH value, and main pollutant types (such as heavy metals Pb²⁺ and Cr) of the contaminated soil layer. 6 ⁺ or organic matter such as polycyclic aromatic hydrocarbons and concentration data; based on this data, a fluidized solidified slurry with targeted pollution control function is designed and formulated. Its core is a functional composite slurry component, including cement-based cementitious materials, silica-alumina active mineral admixtures, functional additives selected according to the characteristics of pollutants (such as heavy metal chelating agents or supported catalytic degradation components), and high water-reducing rheology modifiers. Subsequently, vibration-free drilling techniques such as static pressure self-drilling or spiral extrusion are used to form pile holes in the contaminated soil layer to avoid disturbance that could cause pollutant migration. During hole formation or simultaneous drilling, a bottom-retreating grouting pipeline system, consisting of a hollow self-drilling grouting drill rod and an adjustable bottom-end check valve, is used to inject fluidized solidified grout from the bottom of the pile hole upwards in stages. The grouting process is carried out under closed or semi-closed conditions, and the borehole opening is equipped with a sealing device to prevent grout overflow and air pressure disturbance. During grouting, the grouting pressure (0.2–0.5 MPa) and grouting rate (8–15 MPa) are dynamically adjusted according to the soil permeability and lateral confinement pressure. The flow rate is L / min, and real-time monitoring of grout return ensures uniform grout expansion. Simultaneously, segmented isolation rings are set along the pile hole depth direction, dividing the area into multiple grouting units. Matching functional composite grout components are injected to address the differences in contaminants at different depths, forming a vertically gradient contaminant-targeted response structure. The injected fluidized solidified grout expands naturally under its own weight and the lateral constraints of the surrounding contaminated soil, flexibly compacting the soil around the pile, achieving in-situ filling without tamping or vibration. This lays the foundation for subsequent compaction-free pile formation and long-term contaminant fixation.

[0063] S2: After the injected fluidized solidified slurry is injected, a non-compacting compaction pile is formed, which is used to fix pollutants for a long time.

[0064] Among them, the non-compacting compaction pile body includes maintaining the pile hole in a closed state after the fluid solidified grout is injected to avoid external disturbance, so that the grout can be naturally stabilized by its own weight settlement and the lateral constraints provided by the surrounding contaminated soil under the conditions of no external vibration and no tamping load.

[0065] During the natural stabilization process under lateral constraints, the fluidized solidified slurry of the composite slurry components with different functions inside the slurry undergoes a hydration reaction to form a fluidized solidified slurry solidified body, which refers to the compaction pile body without tamping.

[0066] Long-term fixation of pollutants involves utilizing hydration reactions and constructing a multi-scale stable system with pollutant-fixed microstructures as the core within the non-compacted compaction pile. The pollutant-fixed microstructures are composed of chemically bonded phases, physically adsorbed phases, and low-permeability barrier phases, which lock in pollutants under long-term service conditions, thus achieving long-term fixation of pollutants.

[0067] Furthermore, after the fluidized solidification grout is injected, the pile hole is immediately sealed to maintain a tight seal and prevent external vibration, rainwater infiltration, or human disturbance. This allows the grout to settle slowly under its own weight in a completely static, vibration-free environment, achieving uniform and stable volume shrinkage and structural densification under the natural lateral constraint provided by the surrounding contaminated soil. During this natural stabilization process, the various phases of the grout, composed of differentiated functional composite grout components, simultaneously initiate hydration reactions. Cement-based cementitious materials and active mineral admixtures generate hydration products such as CSH gel and ettringite, while functional additives, such as heavy metal chelators or catalytic degradation components, are activated in a suitable pH and ionic environment. As the hydration reaction continues, the grout gradually transforms from a fluid state to a solid state, ultimately forming a structurally complete, low-permeability, and high-mechanical-strength material. The solidified slurry is a fluidized solidified body, i.e., a compaction-free pile. Simultaneously, a multi-scale stable system with a pollutant immobilization microstructure as its core is constructed within the pile. This microstructure is composed of three functional phases working together: a chemically bonded phase (such as insoluble complex crystals formed by heavy metal ions and chelating agents), a physically adsorbed phase (such as a van der Waals adsorption layer of organic pollutants on a nanoporous carrier), and a low-permeability barrier phase (a micron-nano pore network formed by the interweaving of dense hydration products). The three phases work together to firmly lock the pollutants in the pile matrix. This immobilized microstructure not only matches the spatial distribution of pollutants but also achieves long-term stability through the continuous development of hydration products over time. This ensures that pollutants cannot migrate, release, or reactivate throughout the entire service life of the foundation, truly achieving long-term fixation and safe storage of contaminated soil.

[0068] S3: By controlling the two-stage setting time of the fluidized solidified slurry, pollutants are simultaneously induced to react with the components of the fluidized solidified slurry during the solidification process of the compaction pile, forming a pollutant immobilization microstructure inside the compaction pile, thus constructing a composite foundation system with pollutant control capabilities.

[0069] The two-stage setting sequence includes an initial setting time window and a final setting time window. The formation of the two-stage setting sequence includes introducing a composite regulation system of retarding regulator and setting trigger into the functional composite slurry components during the fluidized solidification slurry preparation stage. The retarding regulator is an organophosphonate or sugar derivative, which is used to delay the initial reaction rate of cement hydration and control the initial setting time window.

[0070] The coagulation trigger is a nano-crystal seed or soluble aluminum salt, which is activated at a preset time point or under changes in ambient pH, thereby concentrating the final coagulation time window and forming a controllable two-stage coagulation sequence.

[0071] The solidification process of the non-compacted compaction pile body includes the control of the initial setting time window and the final setting time window, so that the grout maintains sufficient fluidity before the initial setting time window, so as to penetrate into the micropores of the contaminated soil around the pile body and come into contact with the pollutant molecules or ions that diffuse in.

[0072] Once the initial setting time window is reached, the viscosity of the slurry increases, which restricts the migration of pollutants and simultaneously activates the exposure of active sites of heavy metal chelating agents or catalytic degradation components.

[0073] Once the final setting time window is reached, hydration products are generated and encapsulate the bound pollutants, promoting the synchronous development of chemically bonded phases, physically adsorbed phases, and low-permeability barrier phases inside the pile, jointly constructing a microstructure for pollutant immobilization.

[0074] S3.1: Constructing a composite foundation system with pollutant control capabilities involves matching the spatial distribution of pollutant immobilization microstructures with the pollutant concentration gradient. In the outer pollution interface area of ​​the pile body, the pollutant immobilization microstructures are mainly composed of density adsorption phases and rapid chelation phases. In the inner pollution interface area of ​​the pile body, a pollutant locking system with functional gradients from the outside to the inside is formed, thus completing the construction of a composite foundation system with pollutant control capabilities.

[0075] Furthermore, in the preparation stage of the fluidized solidification slurry, a composite regulation system consisting of a retarder and a settling accelerator is introduced into the functional composite slurry components to precisely control its two-stage setting sequence. The retarder uses organic phosphonates or sugar derivatives to effectively inhibit the early hydration reaction rate of cement, delaying the initial setting time window to 3-6 hours, ensuring that the slurry has sufficient fluidity after injection. The settling accelerator uses nano-crystals or soluble aluminum salts (such as aluminum sulfate), which are activated at a preset time point or due to changes in the pH of the pore liquid, promoting the accelerated and concentrated occurrence of the hydration reaction, so that the final setting time window is precisely controlled within 8-12 hours, thus forming a controllable two-stage setting sequence of "retarder first, then settling". In the in-situ solidification process of the non-compacted compaction pile, this time-series regulation mechanism plays a key role: before the initial setting time window, the slurry maintains a low viscosity and high fluidity state, fully penetrating into the micropores and cracks of the contaminated soil around the pile, and making extensive contact with the pollutant molecules or ions that have diffused and migrated there; after entering the initial setting stage, the viscosity of the slurry rises rapidly, forming a preliminary network structure, which on the one hand restricts the further migration of pollutants, and on the other hand triggers the exposure of active sites of heavy metal chelating agents or supported catalytic degradation components, initiating the pollutant immobilization reaction; subsequently, in the final setting stage, a large number of hydration products (such as CSH gel and ettringite) are rapidly generated and encapsulate the bound pollutants, simultaneously constructing a pollutant immobilization microstructure composed of a chemically bonded phase (such as metal-chelate complex crystals), a physically adsorbed phase (such as the adsorption layer of organic matter on a mesoporous carrier), and a low-permeability barrier phase (dense hydration matrix). Furthermore, the spatial distribution of this microstructure is coordinated with the pollution concentration gradient: in the interface zone where the outer edge of the uncompacted pile body is in direct contact with the highly polluted soil, the microstructure is dominated by high-density physical adsorption phase and fast-response chelating phase, which preferentially capture high-concentration pollutants; while in the low-pollution area at the inner edge of the pile body, the low-permeability barrier phase is dominant, forming a gradient pollutant locking system with progressively advanced functions from the outside to the inside. Ultimately, multiple such pile bodies and the synergistically treated inter-pile soil together constitute an integral, long-lasting, and highly reliable composite foundation system with pollutant control capabilities.

[0076] Preferably, the soil improvement referred to in this invention specifically refers to the limited mixing and reaction between the fluidized solidified slurry and the locally contaminated soil around the pile during the pile-forming process of non-compacted compaction piles, within a range not exceeding 1.5 times the pile diameter, to form a pile structure with low permeability and pollutant fixation capacity. This process does not aim to change the overall engineering properties of the soil layer of the site, but rather achieves the dual goals of controlling pollution and bearing load through the structural integrity and chemical stability of the pile itself. The soil between the piles retains its original physical state, and the overall performance of the composite foundation is provided by the joint action of the pile and the soil.

[0077] In a preferred embodiment, a fluidized solidified soil non-compacted compaction pile composite foundation treatment system includes a pollutant solidification composite foundation construction module, which constructs a composite foundation system to enable pollutant solidification by injecting fluidized solidified slurry into the composite foundation system; a non-compacted compaction pile forming and long-term pollutant fixation module, which forms non-compacted compaction piles after injecting the fluidized solidified slurry, and uses the non-compacted compaction piles to fix pollutants for a long time; and a two-stage setting time control and pollutant fixation microstructure construction module, which controls the two-stage setting time of the fluidized solidified slurry to simultaneously induce pollutants to react with the components of the fluidized solidified slurry during the solidification process of the non-compacted compaction piles, forming a pollutant fixation microstructure inside the non-compacted compaction piles, thus constructing a composite foundation system with pollutant control capabilities.

[0078] The above-mentioned unit modules can be embedded in the processor of the computer device in hardware form or independent of it, or they can be stored in the memory of the computer device in software form, so that the processor can call and execute the corresponding operations of the above modules.

[0079] In one embodiment, a computer device is provided, which may be a terminal. The computer device includes a processor, memory, a communication interface, a display screen, and an input device connected via a system bus. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage medium. The communication interface of the computer device is used for wired or wireless communication with external terminals. Wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. The display screen of the computer device may be an LCD screen or an e-ink display screen. The input device of the computer device may be a touch layer covering the display screen, or buttons, a trackball, or a touchpad located on the casing of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0080] In summary, this invention effectively solves the technical challenges of traditional high-disturbance construction techniques in contaminated site applications, such as the easy diffusion and migration of pollutants and the difficulty in forming a stable solidified body, by constructing a non-compacted compaction pile composite foundation treatment method for fluidized solidified soil. This method employs vibration-free, non-dynamic compaction static pressure or self-drilling grouting pile forming processes, avoiding disturbance to the contaminated soil and preventing secondary pollution. Simultaneously, the functional composite grout material components, customized based on the characteristics of the contaminated soil layer, can chelate, adsorb, or catalytically degrade heavy metals or organic pollutants during the pile solidification process. Through two-stage coagulation timing control, it precisely constructs a pollutant immobilization microstructure composed of a chemically bonded phase, a physically adsorbed phase, and a low-permeability barrier phase, achieving in-situ long-term contamination of pollutants. The resulting non-compacted compaction pile and the soil between the piles together constitute a composite foundation system with both high bearing capacity and pollution control capabilities, suitable for complex contaminated sites such as soft soils and those with high water content, significantly improving the safety, remediation efficiency, and engineering applicability of foundation treatment.

[0081] Reference Figure 3 and Figure 4 After introducing the method and system of exemplary embodiments of the present invention, the following references are made. Figure 3 A computer-readable storage medium according to exemplary embodiments of the present invention will be described, please refer to... Figure 3 The computer-readable storage medium shown is an optical disc 30, on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it implements the steps described in the above-described method implementation, such as constructing a composite foundation system to enable pollutant solidification, injecting a fluidized solidified slurry into the composite foundation system; forming a non-compacted compaction pile after the injected fluidized solidified slurry, and using the non-compacted compaction pile to permanently fix the pollutants; by controlling the two-stage setting sequence of the fluidized solidified slurry, during the solidification process of the non-compacted compaction pile, the pollutants are simultaneously induced to react with the components of the fluidized solidified slurry, forming a pollutant-fixing microstructure inside the non-compacted compaction pile, thus constructing a composite foundation system with pollutant control capabilities. The specific implementation methods of each step will not be repeated here.

[0082] It should be noted that examples of computer-readable storage media may also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical and magnetic storage media, which will not be elaborated here.

[0083] After introducing the methods and media of exemplary embodiments of the present invention, the following references are made. Figure 4A computational device for adaptive recovery of low-voltage power grid self-healing control according to an exemplary embodiment of the present invention.

[0084] Figure 4 A block diagram is shown of an exemplary computing device 40 suitable for implementing embodiments of the present invention. The computing device 40 may be a computer system or a server. Figure 4 The computing device 40 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0085] like Figure 4 As shown, the components of computing device 40 may include, but are not limited to: one or more processors or processing units 401, system memory 402, and bus 403 connecting different system components (including system memory 402 and processing unit 401).

[0086] The computing device 40 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computing device 40, including volatile and non-volatile media, and removable and non-removable media.

[0087] System memory 402 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 4021 and / or cache memory 4022. Computing device 40 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, ROM 4023 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 4 (Not shown in the image, usually referred to as "hard drive"). Although not shown in... Figure 4 The diagram illustrates that disk drives for reading and writing to removable non-volatile disks (e.g., "floppy disks") and optical disc drives for reading and writing to removable non-volatile optical discs (e.g., CD-ROMs, DVD-ROMs, or other optical media) can be provided. In these cases, each drive can be connected to bus 403 via one or more data media interfaces. System memory 402 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0088] A program / utility 4025 having a set (at least one) of program modules 4024 may be stored, for example, in system memory 402, and such program modules 4024 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment. Program modules 4024 typically perform the functions and / or methods described in the embodiments of the present invention.

[0089] The computing device 40 can also communicate with one or more external devices 404 (such as a keyboard, pointing device, display, etc.). This communication can be performed via the input / output (I / O) interface 405. Furthermore, the computing device 40 can also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 406. Figure 4 As shown, network adapter 406 communicates with other modules of computing device 40 (such as processing unit 401) via bus 403. It should be understood that, although... Figure 4 As not shown, it can be used in conjunction with computing device 40 with other hardware and / or software modules.

[0090] The processing unit 401 executes various functional applications and data processing by running programs stored in the system memory 402. For example, it constructs a composite foundation system to enable pollutant solidification and injects fluidized solidified slurry into the composite foundation system. After injecting the fluidized solidified slurry, it forms a non-compacted compaction pile and uses the non-compacted compaction pile to fix pollutants for a long time. By controlling the two-stage setting sequence of the fluidized solidified slurry, the pollutants are simultaneously induced to react with the components of the fluidized solidified slurry during the solidification process of the non-compacted compaction pile, forming a pollutant-fixing microstructure inside the non-compacted compaction pile, thus constructing a composite foundation system with pollutant control capabilities.

[0091] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0092] In the several embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0093] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0094] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0095] If the functionality is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0096] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0097] Furthermore, although the operations of the method of the present invention are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

Claims

1. A method for treating a composite foundation of fluidized solidified soil without compaction piles, characterized in that: include, Construct a composite foundation system to enable pollutant solidification, and inject fluidized solidified slurry into the composite foundation system; After the injected fluidized solidified slurry is used to form a non-compacting compaction pile, the non-compacting compaction pile can be used to fix pollutants for a long time. By controlling the two-stage setting time of the fluidized solidified slurry, pollutants are simultaneously induced to react with the components of the fluidized solidified slurry during the solidification process of the compaction pile, forming a pollutant immobilization microstructure inside the compaction pile and constructing a composite foundation system with pollutant control capabilities.

2. The method for treating a composite foundation of fluidized solidified soil without compaction piles as described in claim 1, characterized in that: The construction of the composite foundation system includes the design and preparation of a fluidized solidified slurry based on the physicochemical properties and pollutant types of the contaminated soil layer on site. The fluidized solidified slurry comprises functional composite slurry components. Piles are formed in contaminated soil layers using a vibration-free drilling process. The functional composite slurry components and the contaminated soil layers have an in-situ synergistic relationship, which includes a targeted adaptation relationship and an in-situ reaction-solidification coupling relationship. After the hole is formed or during the process, the fluidized solidified grout is injected into the pile hole through bottom grouting or segmented grouting. Under the action of its own weight and the lateral pressure of the surrounding soil, the fluidized solidified grout naturally expands and flexibly compacts the surrounding soil containing pollutants, ensuring that the pollutants do not migrate or spread due to construction disturbance.

3. The method for treating a composite foundation of fluidized solidified soil without compaction piles as described in claim 2, characterized in that: The targeted adaptation relationship is used to design the formulation of functional composite slurry components according to the type and concentration level of pollutants in the contaminated soil layer and the physicochemical properties of the soil. When the contaminated soil layer is mainly composed of heavy metals, a heavy metal chelating agent is introduced into the functional composite mortar. When organic pollutants are the main pollutants, supported catalytic degradation components are selected to ensure that the functional composite slurry components can interact with the target pollutants in the contaminated soil layer. The in-situ reaction and solidification coupling relationship includes the fact that when the fluidized solidified slurry is injected into the pile hole, the components of the fluidized solidified slurry participate in the formation of the structure of the non-compacted compaction pile, and at the same time, an in-situ reaction occurs with the interface of the contaminated soil layer and the local soil that is squeezed in. When heavy metal ions are chelated and fixed, and organic pollutants are adsorbed or catalytically decomposed, they are encapsulated in a low-permeability solidification matrix. At this time, the functional composite slurry components do not exist in isolation, but actively intervene in the remediation process of contaminated soil layers, completing the integration of foundation reinforcement and pollution control.

4. The method for treating a composite foundation of fluidized solidified soil without compaction piles as described in claim 3, characterized in that: The injection of fluidized solidified grout into the composite foundation system includes using a bottom-retreating grouting pipeline system in the pile hole that has been completed without vibration drilling. The bottom-retreating grouting pipeline system consists of a hollow self-drilling grouting drill rod and an adjustable bottom one-way valve to ensure that the fluidized solidified grout is filled from the bottom of the pile hole upwards in sections, avoiding segregation or floating of the fluidized solidified grout in the highly water-contaminated soil layer. During the grouting process of injecting fluidized solidified grout, the grouting pressure is dynamically adjusted according to the permeability and lateral pressure distribution of the contaminated soil layer. Combined with real-time monitoring of grout return from the pile hole during vibration-free drilling, the grouting rate is controlled so that the fluidized solidified grout can expand uniformly under its own weight and the lateral constraint of the surrounding contaminated soil. Segmented isolation rings are set up along the grouting path to divide the pile hole into several grouting units along the depth. In response to the differences in pollutant types in soil layers at different depths, fluidized solidified grout with differentiated functions is injected into several grouting units to form a gradient solidification structure with targeted pollutant response in the vertical direction. The process of injecting the fluidized solidified grout into the composite foundation system is carried out under closed or semi-closed conditions. The grouting pipeline and orifice under the grouting pipeline system are equipped with sealing and grout-stopping devices to prevent the fluidized solidified grout from overflowing and the migration of pollutants caused by pore air pressure disturbance, thus completing the injection of the fluidized solidified grout.

5. The method for treating a composite foundation of fluidized solidified soil without compaction piles as described in claim 4, characterized in that: The non-compacting compaction pile body includes maintaining the pile hole in a closed state after the fluidized solidified grout is injected to avoid external disturbance, so that the grout can be naturally stabilized by its own weight settlement and the lateral constraints provided by the surrounding contaminated soil under the conditions of no external vibration and no tamping load. During the natural stabilization process under lateral constraints, the fluidized solidified slurry of the composite slurry components with different functions inside the slurry undergoes a hydration reaction to form a fluidized solidified slurry solidified body, which refers to a compaction pile body without tamping. The long-term fixation of pollutants includes utilizing hydration reactions and constructing a multi-scale stable system with pollutant-fixed microstructures as the core within the non-compacted pile body. The pollutant-fixed microstructures are composed of chemically bonded phases, physically adsorbed phases, and low-permeability barrier phases, which lock in pollutants under long-term service conditions, thus achieving long-term fixation of pollutants.

6. The method for treating a composite foundation of fluidized solidified soil without compaction piles as described in claim 5, characterized in that: The two-stage setting sequence includes an initial setting time window and a final setting time window. The formation of the two-stage setting sequence includes introducing a composite regulation system of a retarding regulator and a setting trigger into the functional composite slurry component during the fluidized solidification slurry preparation stage. The retarding regulator is an organophosphonate or a sugar derivative, which is used to delay the initial reaction rate of cement hydration and control the initial setting time window. The coagulation trigger is a nano-crystal seed or soluble aluminum salt, which is activated at a preset time point or under changes in ambient pH, thereby concentrating the final coagulation time window and forming a controllable two-stage coagulation sequence. The solidification process of the non-compacted compaction pile body includes the control of the initial setting time window and the final setting time window, so that the grout maintains sufficient fluidity before the initial setting time window, so as to penetrate into the micropores of the contaminated soil around the pile body and come into contact with the pollutant molecules or ions that diffuse in. Once the initial setting time window is reached, the viscosity of the slurry increases, which restricts the migration of pollutants and simultaneously activates the exposure of active sites of heavy metal chelating agents or catalytic degradation components. Once the final setting time window is reached, hydration products are generated and encapsulate the bound pollutants, promoting the synchronous development of chemically bonded phases, physically adsorbed phases, and low-permeability barrier phases inside the pile, jointly constructing a microstructure for pollutant immobilization.

7. The method for treating a composite foundation of fluidized solidified soil without compaction piles as described in claim 6, characterized in that: The construction of a composite foundation system with pollutant control capabilities involves matching the spatial distribution of pollutant immobilization microstructures with the pollutant concentration gradient. In the outer pollution interface area of ​​the pile body, the pollutant immobilization microstructures are mainly composed of density adsorption phases and rapid chelation phases. In the inner pollution interface area of ​​the pile body, a pollutant locking system with functional gradients from the outside to the inside is formed, thus completing the construction of a composite foundation system with pollutant control capabilities.

8. A fluidized solidified soil compaction pile composite foundation treatment system, based on the fluidized solidified soil compaction pile composite foundation treatment method according to any one of claims 1 to 7, characterized in that: include, The pollutant solidification composite foundation construction module constructs a composite foundation system, enabling it to solidify pollutants by injecting fluidized solidified slurry into the composite foundation system. The module for forming non-compacted compaction piles and long-term fixation of pollutants forms non-compacted compaction piles after injecting fluidized solidified slurry, and uses non-compacted compaction piles to fix pollutants for a long time. The two-stage coagulation timing control and pollutant immobilization microstructure construction module controls the two-stage coagulation timing of the fluidized solidified slurry. During the solidification process of the non-compacted compaction pile, it simultaneously induces pollutants to react with the components of the fluidized solidified slurry, forming a pollutant immobilization microstructure inside the non-compacted compaction pile, thus constructing a composite foundation system with pollutant resistance capabilities.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, it implements the steps of the fluidized solidified soil non-compacted compaction pile composite foundation treatment method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, it implements the steps of the non-compacting compaction pile composite foundation treatment method for fluidized solidified soil as described in any one of claims 1 to 7.

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