Shallow layer strong stirring sludge site solidification construction method

Abstract

The present application relates to the technical field of solidification pile foundation, and discloses a shallow strong mixing silt site solidification construction method, which comprises the following steps: preparing solidification agent slurry, placing the solidification agent slurry in a slurry barrel for standby; building a ring-shaped construction road at the periphery of the silt site; arranging a strong mixer on the construction road, wherein the strong mixer is provided with a stirring head; since the bearing capacity of the silt site is extremely low, the strong mixer cannot be arranged on the silt site, so the strong mixer is arranged on the construction road at the periphery of the silt site, the solidification agent slurry is sprayed into the silt through a grouting pipe, and the solidification agent slurry is uniformly mixed with the silt through the stirring head, so that a ring-shaped solidification layer is formed; the strong mixer can be moved inward and arranged in the ring-shaped solidification layer; the above-mentioned operation of forming the ring-shaped solidification layer is repeated to form a new ring-shaped solidification layer, until the silt in the whole silt site is solidified; in this way, the solidification agent slurry and the silt can be fully mixed, the solidification effect is ideal, and the overall operation is simple.

Description

Technical Field

[0001] This invention patent relates to the technical field of solidified pile foundations, and more specifically, to a construction method for solidifying shallow, high-intensity stirred silt sites. Background Technology

[0002] With the continuous development of cities along my country's southeast coast and the booming civil engineering industry, coastal sites are also being developed. Coastal areas often have silt-filled sites, which present challenges in foundation treatment and make construction extremely inconvenient.

[0003] In existing technologies, the replacement method is required for shallow silt sites. Because silt sites have low bearing capacity, the silt layer is excavated and replaced with soil to improve the soil's bearing capacity. However, this construction method has limited applicability; it cannot be used for very deep silt layers, and it is also costly and extremely complicated to construct. Summary of the Invention

[0004] The purpose of this invention is to provide a method for solidifying shallow silt sites with strong mixing, which aims to solve the problem of difficult foundation treatment for shallow silt sites in the prior art.

[0005] This invention is implemented as follows: a shallow, high-intensity mixing method for solidifying sludge sites, comprising the following construction steps:

[0006] 1) Prepare the curing agent slurry and place it in a slurry tank for later use; construct a ring-shaped construction road around the perimeter of the silt site;

[0007] 2) A high-powered mixer is installed on the construction road. The high-powered mixer has a mixing head and is connected to a grout tank via a grouting pipe, which extends to the mixing head.

[0008] 3) As the high-powered mixer moves along the construction road, it uses the mixing head to mix the silt in the silt site. At the same time, the grouting pipe sprays the curing agent slurry into the silt being mixed. The curing agent slurry mixes and solidifies with the silt to form a ring-shaped solidified layer.

[0009] 4) The high-powered mixer moves inward to the solidified layer and moves along the solidified layer. During this process, the mixing head is used to mix the sludge in the sludge site. At the same time, the grouting pipe sprays the curing agent slurry onto the sludge being mixed. The curing agent slurry mixes and solidifies with the sludge to form a new annular solidified layer.

[0010] 5) Repeat step 4) until all the silt in the entire silt site is solidified.

[0011] Optionally, the curing agent slurry is a mixture of a curing agent and water, wherein the curing agent includes mineral powder, cement, and gypsum.

[0012] Optionally, the cement is P.O42.5 cement.

[0013] Optionally, the mineral powder is S95 mineral powder.

[0014] Optionally, the gypsum is desulfurized gypsum.

[0015] Optionally, according to the mass ratio of the curing agent, the cement accounts for 20%, the mineral powder accounts for 65%, and the gypsum accounts for 15%.

[0016] Optionally, the curing agent slurry may also contain additives, including quicklime, hydrated lime, and modified sodium sulfate.

[0017] Optionally, the high-powered mixer includes an excavator with a spatially movable robotic arm. The mixing head is located at the end of the robotic arm. The mixing head is horizontally arranged, with its middle section connected to the end of the robotic arm. Both ends of the mixing head are respectively provided with longitudinally rotating rotating heads. Multiple mixing teeth are provided on the outer periphery of the rotating heads, and these teeth are spaced apart along the outer periphery of the rotating heads. The middle section of the mixing head has a grouting channel, and the grouting pipe is inserted into the grouting channel.

[0018] During the process of using the stirring head to stir the silt in the silt site, the robotic arm drives the stirring head to embed itself in the silt and move within the silt. The two rotating heads rotate in opposite directions, and the stirring teeth on the rotating heads stir the silt. At the same time, the curing agent slurry is sprayed into the stirring silt through the spraying pipe.

[0019] Optionally, the rotating head has an outer end face facing away from the middle of the stirring head, and the rotating head has a transversely arranged central cavity, the outer end of the central cavity penetrating the outer end face, and the inner end of the central cavity being closed.

[0020] Along the longitudinal rotation direction of the rotating head, the outer end face is arranged at an angle; the stirring blade includes multiple outer end blades disposed on the outer end face and multiple outer peripheral blades disposed on the outer periphery of the rotating head; the outer end blades are arranged to extend outward away from the outer end face and are arranged at an angle outward away from the central cavity; the multiple outer peripheral blades are arranged at staggered intervals along the rotating head.

[0021] Optionally, the central cavity is provided with a plurality of protruding teeth, which are arranged at intervals along the circumference of the central cavity; a central shaft is provided at the center of the central cavity, which extends along the center of the central cavity, and there is a stirring interval between the protruding teeth and the central shaft.

[0022] Compared with existing technologies, the shallow-layer high-intensity mixing sludge site solidification construction method provided by this invention addresses the issue of extremely low bearing capacity in sludge sites, making it impossible to deploy high-intensity mixers. Instead, the high-intensity mixer is positioned on the construction road surrounding the sludge site. A grouting pipe is then used to spray the solidifying agent slurry into the sludge, accompanied by mixing with a mixing head. This ensures the solidifying agent slurry and sludge are evenly mixed, forming a ring-shaped solidification layer. This ring-shaped solidification layer can be moved inwards and deployed by the high-intensity mixer. The process of forming a new ring-shaped solidification layer is repeated until all the sludge in the entire sludge site is solidified. This method ensures thorough mixing of the solidifying agent slurry and sludge, achieves ideal solidification results, and simplifies the overall operation. Attached Figure Description

[0023] Figure 1 This is a construction diagram of the shallow, high-intensity mixing sludge site solidification construction provided by the present invention;

[0024] Figure 2 This is a three-dimensional schematic diagram of the stirring head provided by the present invention;

[0025] Figure 3 This is a cross-sectional schematic diagram of the rotating head provided by the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0028] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Reference Figure 1-3 The image shows a preferred embodiment of the present invention.

[0030] The shallow, high-intensity mixing sludge site solidification construction method provided by this invention includes the following construction steps:

[0031] 1) Prepare the curing agent slurry and place it in the slurry tank 200 for later use; construct a ring road 300 around the perimeter of the silt site 400;

[0032] 2) A high-powered mixer 100 is installed on the construction road 300. The high-powered mixer 100 has a mixing head 101 and is connected to the grout tank 200 via a grouting pipe 201. The grouting pipe 201 extends to the mixing head 101.

[0033] 3) As the high-powered mixer 100 moves along the construction road 300, the mixing head 101 mixes the silt in the silt site 400. At the same time, the grouting pipe 201 sprays the curing agent slurry into the silt being mixed. The curing agent slurry mixes and solidifies with the silt to form a ring-shaped solidified layer.

[0034] 4) The high-powered mixer 100 moves inward to the solidified layer after solidification, and while moving along the solidified layer, the mixing head 101 mixes the sludge in the sludge site 400. At the same time, the grouting pipe 201 sprays the curing agent slurry into the sludge being mixed. The curing agent slurry mixes and solidifies with the sludge to form a new annular solidified layer.

[0035] 5) Repeat step 4) until all the silt in the entire 400 m² silt site is solidified.

[0036] The shallow, high-intensity mixing method for solidifying silt site 400 described above addresses the issue of extremely low bearing capacity of the silt site 400, making it impossible to install a high-intensity mixer 100. Instead, the high-intensity mixer 100 is positioned on the construction road 300 surrounding the silt site 400. A grouting pipe 201 is then used to spray the curing agent slurry into the silt, accompanied by mixing with the mixing head 101. This ensures the curing agent slurry and silt are evenly mixed, forming a ring-shaped solidification layer. This ring-shaped solidification layer allows the high-intensity mixer 100 to be moved inwards and deployed. This process is repeated to form new ring-shaped solidification layers until all the silt in the entire silt site 400 is solidified. This method ensures thorough mixing of the curing agent slurry and silt, resulting in an ideal solidification effect and simple overall operation.

[0037] Specifically, the curing agent slurry is a mixture of curing agent and water. The curing agent includes mineral powder, cement, and gypsum. Because cement is expensive, while mineral powder and desulfurized gypsum are cheaper, the cost of this curing agent is much lower than that of cement.

[0038] The cement is P.O42.5 cement. This type of cement has a compressive strength of 42.5 MPa, strong compressive strength, and a short setting time, making it very suitable for construction and decoration.

[0039] The mineral powder is S95 mineral powder. This mineral powder is a high-quality concrete admixture and cementitious material, a highly active powder that is very stable under normal temperature conditions and basically does not undergo chemical hydration reactions. Its potential activity can be activated by adding chemical additives, and therefore can be activated by adding cement and gypsum.

[0040] The gypsum is desulfurized gypsum. Desulfurized gypsum can activate the potential activity of mineral powder, thereby enhancing its stability.

[0041] Based on the mass ratio of the curing agent, cement accounts for 20%, mineral powder accounts for 65%, and gypsum accounts for 15%. Since the prices of mineral powder and desulfurized gypsum are lower than those of cement, the cost of this curing agent is much lower. Furthermore, practical experience shows that, after a good chemical reaction, the curing effect of this curing agent is 3 to 4 times that of cement.

[0042] The curing agent slurry also contains additives, including quicklime, hydrated lime, and modified sodium sulfate. These three substances are used to activate the potential activity of the mineral powder, thereby enhancing its stability. Furthermore, these three additives are used in small quantities and are inexpensive, resulting in very low cost.

[0043] The high-powered mixer 100 includes an excavator with a spatially movable robotic arm 102. A mixing head 101 is disposed at the end of the robotic arm 102. The mixing head 101 is horizontally arranged, with its middle part connected to the end of the robotic arm 102. Both ends of the mixing head 101 are respectively provided with longitudinally rotating rotating heads 103. The outer periphery of the rotating heads 103 is provided with multiple mixing teeth 104, which are spaced apart along the outer periphery of the rotating heads 103. The middle part of the mixing head 101 has a grouting channel, and a grouting pipe 201 is inserted into the grouting channel.

[0044] During the process of stirring the sludge in the sludge site 400 using the stirring head 101, the robotic arm 102 drives the stirring head 101 to embed itself in the sludge and move within the sludge. The two rotating heads 103 rotate in opposite directions, and the stirring teeth 104 on the rotating heads 103 stir the sludge. At the same time, the curing agent slurry is sprayed into the stirring sludge through the spraying pipe.

[0045] The stirring position of the stirring head 101 can be adjusted by using the robotic arm 102. The stirring head 101 has a rotating head 103, which can play a stirring role by rotating in opposite directions. Multiple stirring teeth 104 are provided on the outer periphery of the stirring head 101 to enhance the stirring intensity. At the same time, the curing agent slurry is sprayed out from the spraying channel to promote the accelerated and uniform mixing of the curing agent slurry and the sludge, so as to ensure the curing quality.

[0046] The rotating head 103 has an outer end face that is away from the middle of the stirring head 101. The rotating head 103 has a transversely arranged central cavity 105. The outer end of the central cavity 105 penetrates the outer end face, and the inner end of the central cavity 105 is closed.

[0047] Along the longitudinal rotation direction of the rotating head 103, the outer end face is arranged at an angle; the stirring blade includes multiple outer end blades 106 disposed on the outer end face and multiple peripheral blades 107 disposed on the outer periphery of the rotating head 103; the outer end blades 106 extend outward away from the outer end face and are arranged at an angle outward away from the central cavity 105; the multiple peripheral blades 107 are arranged at staggered intervals along the rotating head 103.

[0048] By providing stirring blades on the outer periphery and outer end face of the rotating head 103, the stirring speed is effectively enhanced. Furthermore, the outer end blade 106 extends outward from the outer end face and the middle cavity 105, increasing the stirring range and further dispersing the sludge, thus promoting uniform mixing of the sludge and the curing agent slurry.

[0049] The central cavity 105 is provided with a plurality of protruding teeth 108, which are arranged at intervals along the circumference of the central cavity 105; a central shaft 109 is provided at the center of the central cavity 105, which extends along the center of the central cavity 105, and there is a stirring interval between the protruding teeth 108 and the central shaft 109.

[0050] Since the central cavity 105 extends through the outer end face, the sludge and curing agent slurry can enter the mixing compartment. The central shaft 109 rotates with the rotating head 103. The curing agent slurry and sludge entering the mixing compartment are continuously stirred as the central shaft 109 rotates, so that the curing agent slurry and sludge are evenly mixed.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for solidifying shallow, high-intensity mixed sludge sites, characterized in that, The construction steps include the following: 1) Prepare the curing agent slurry and place it in a slurry tank for later use; construct a ring-shaped construction road around the perimeter of the silt site; 2) A high-powered mixer is installed on the construction road. The high-powered mixer has a mixing head and is connected to a grout tank via a grouting pipe, which extends to the mixing head. 3) As the high-powered mixer moves along the construction road, it uses the mixing head to mix the silt in the silt site. At the same time, the grouting pipe sprays the curing agent slurry into the silt being mixed. The curing agent slurry mixes and solidifies with the silt to form a ring-shaped solidified layer. 4) The high-powered mixer moves inward to the solidified layer and moves along the solidified layer. During this process, the mixing head is used to mix the sludge in the sludge site. At the same time, the grouting pipe sprays the curing agent slurry onto the sludge being mixed. The curing agent slurry mixes and solidifies with the sludge to form a new annular solidified layer. 5) Repeat construction step 4) until all the silt in the entire silt site is solidified; The high-powered mixer includes an excavator with a spatially movable robotic arm. A mixing head is located at the end of the robotic arm. The mixing head is horizontally arranged, with its middle section connected to the end of the robotic arm. Both ends of the mixing head are respectively provided with longitudinally rotating rotating heads. Multiple mixing teeth are provided on the outer periphery of each rotating head, spaced apart along the outer periphery. A grouting channel is located in the middle of the mixing head, and a grouting pipe is inserted into the grouting channel. When the stirring head is used to stir the sludge in the sludge site, the robotic arm drives the stirring head to embed itself in the sludge and move in the sludge. The two rotating heads rotate in opposite directions, and the stirring teeth on the rotating heads stir the sludge. At the same time, the curing agent slurry is sprayed into the stirring sludge through the spraying pipe. The rotating head has an outer end face facing away from the middle of the stirring head, and the rotating head has a transversely arranged central cavity. The outer end of the central cavity penetrates the outer end face, and the inner end of the central cavity is closed. Along the longitudinal rotation direction of the rotating head, the outer end face is arranged at an angle; the rotating head is provided with a stirring blade, the stirring blade including a plurality of outer end blades provided on the outer end face and a plurality of outer peripheral blades provided on the outer periphery of the rotating head; the outer end blades are arranged to extend outward away from the outer end face, and the outer end blades are arranged at an angle outward away from the central cavity; the plurality of outer peripheral blades are arranged at staggered intervals along the rotating head. The central cavity is provided with a plurality of protruding teeth, which are arranged at intervals along the circumference of the central cavity; a central shaft is provided at the center of the central cavity, which extends along the center of the central cavity, and there is a stirring interval between the protruding teeth and the central shaft.

2. The shallow, high-intensity mixing sludge site solidification construction method as described in claim 1, characterized in that, The curing agent slurry is a mixture of curing agent and water, and the curing agent includes mineral powder, cement and gypsum.

3. The shallow, high-intensity mixing sludge site solidification construction method as described in claim 2, characterized in that, The cement is P.O42.5 cement.

4. The shallow, high-intensity mixing sludge site solidification construction method as described in claim 2, characterized in that, The mineral powder is S95 mineral powder.

5. The shallow, high-intensity mixing sludge site solidification construction method as described in claim 2, characterized in that, The gypsum is desulfurized gypsum.

6. The shallow, high-intensity mixing sludge site solidification construction method as described in claim 2, characterized in that, According to the mass ratio of the curing agent, the cement accounts for 20%, the mineral powder accounts for 65%, and the gypsum accounts for 15%.

7. The shallow, high-intensity mixing sludge site solidification construction method as described in claim 2, characterized in that, The curing agent slurry also contains additives, including quicklime, hydrated lime, and modified sodium sulfate.

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