In-situ curing stirring equipment

Abstract

The utility model provides in-situ curing stirring equipment, which relates to the technical field of underground construction mechanical equipment and comprises a mounting support plate, an extension arm, a stirring head and an oil path system. The mounting supporting plate is located at the top end of the in-situ curing stirring equipment, the mounting supporting plate is connected with the stirring heads through the extension arms, the at least two stirring heads are arranged at the bottom end of the in-situ curing stirring equipment according to a certain angle, and a plurality of fixed stirring blades and a plurality of active stirring blades are arranged on the stirring heads respectively. The fixed stirring blades and the driving stirring blades are arranged in a staggered mode and achieve mutual cutting, the stirring heads are driven by an oil way system to rotate, and a nozzle is arranged on the inner side of the fixed stirring blade on each stirring head. The stirring equipment disclosed by the utility model has the advantages that the stirring equipment adopts a novel blade structure, the rotation frequency of the stirring head is monitored by utilizing an oil path system, and meanwhile, the reasonable position and structure of the nozzle are designed, so that high-quality uniform stirring of a curing agent and a soil body in situ is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of underground construction machinery and equipment, in particular to an in-situ solidification mixing device. Background Art

[0002] In-situ shallow solidification technology is a new type of soil treatment technology. Its essence lies in the use of curing agents to directly solidify soft soils such as silt in situ. The main goal of this technology is to enhance the strength and stability of soft soil sites, so that sites that were originally considered abandoned can be reused and used for the subsequent construction of buildings and transportation facilities. In this foundation treatment process, the curing agent is mixed with silt / clay, and after a series of complex physical and chemical reactions, the silt / clay layer is transformed into a new base with stable bearing capacity. This can meet the needs of various types of engineering construction and realize the efficient resource utilization of abandoned land. In-situ shallow solidification technology has significant advantages. It can not only achieve zero discharge and resource conservation of waste soil, but also improve the strength of foundation soil to meet the engineering requirements for ground endurance. In addition, this technology is environmentally friendly and widely used. It is suitable for multiple fields and different soil layers, improving foundation stability and extending service life.

[0003] The following issues need to be addressed during the use of this technology:

[0004] 1. The mixing blades of existing mixing equipment are often single-layer structures with simple blade structures. The disturbance to the soil is insufficient during mixing, making it difficult to ensure uniform mixing of the soil and the solidifying material, making it difficult for the reinforcement effect to meet the design requirements.

[0005] 2. The curing agent nozzle of the existing mixing equipment is generally located at the root of the mixing head, and a circular nozzle is used. The curing agent cannot reach the effective mixing range when sprayed, and no relevant protection is provided. The nozzle is prone to blockage during the mixing operation, resulting in the curing agent being unable to be injected into the ground according to the preset amount requirements, which may pose a potential threat to the construction quality and make it difficult to ensure the quality of the project.

[0006] 3. The current mixing equipment cannot determine the number of stirring times of the mixing blades during the construction process, and there is currently no technical means and technical equipment to accurately measure the real-time rotation speed of the mixing head, which may lead to uneven mixing during construction and seriously affect the quality of the project and the construction effect. Utility Model Content

[0007] In view of the characteristics of existing in-situ solidification mixing equipment and the technical problems it faces, the utility model proposes an in-situ solidification mixing equipment, which adopts a structure in which fixed mixing blades and active mixing blades cooperate and cut each other, and uses an oil circuit system to monitor the number of rotations of the mixing head, while changing the position of the nozzle, effectively ensuring the uniform mixing of the curing agent and the soil in situ.

[0008] For the purpose of this utility model, the following technical solutions are adopted:

[0009] An in-situ solidification mixing device comprises a mounting support plate, an extension arm and at least two mixing heads and an oil circuit system; the upper end of the extension arm is arranged on the mounting support plate, and a plurality of mixing heads are arranged at intervals in the circumferential direction at the lower end of the extension arm; each mixing head comprises a mixing fixed part and a mixing rotating part; the mixing fixed part is fixedly arranged at the lower end of the extension arm, and the mixing rotating part is rotatably connected to the mixing fixed part; a plurality of fixed mixing blades are arranged at intervals in the circumferential direction on the outer peripheral wall of the mixing fixed part, and a plurality of active mixing blades are arranged at intervals in the circumferential direction on the outer peripheral wall of the mixing rotating part, and the fixed mixing blades and the active mixing blades are staggered and cut each other; a nozzle is arranged on the inner side of at least one of the fixed mixing blades on each mixing head; the oil circuit system is arranged on the extension arm, and the oil circuit system is connected to the mixing rotating part, and the oil circuit system is used to drive the mixing rotating part to rotate, and at the same time, the number of rotations is converted and recorded by the amount of flowing oil. The equipment can increase the stirring intensity and stirring uniformity through the multiple stirring heads, and further improve the stirring capacity by realizing mutual cutting between the fixed stirring blades and the active stirring blades. The number of rotations of the stirring head can be recorded through the oil circuit system, and the mixing quality of the curing agent and the soil in situ can be guaranteed through the construction rotation data control. Finally, the structure with the nozzle set on the inside is not easy to be blocked during the stirring operation, thereby ensuring the quality of the project.

[0010] Preferably, the agitation fixed part is a fixed support; the fixed support is fixedly arranged at the lower end of the extension arm, and the fixed agitation blades are arranged at intervals along the circumferential direction on the outer peripheral wall of the fixed support; the agitation rotating part includes a rotating shaft, a rotating shell and a rotating drive member; the rotating drive member is arranged in the fixed support and provides a rotating power, the rotating shell is rotatably connected in the fixed support through the rotating shaft, and the rotating shaft is fixedly connected to the driving part of the rotating drive member; the active agitation blades are arranged at intervals along the circumferential direction on the outer peripheral wall of the rotating shell. In the above structure, the fixed support is connected to the rotating shell through the rotating shaft, and the rotating drive member is enclosed in the rotating shell to drive the agitator to rotate.

[0011] Preferably, end blades are arranged at intervals along the circumferential direction on the outer peripheral wall of the rotating shell; a cover plate is provided on the bottom surface of the rotating shell; a plurality of ridges are arranged on the upper diameter of the cover plate; and the ridges protrude from the cover plate by 3 to 5 cm. The above structure is responsible for cutting the soil and the main stirring function through the active stirring blades and the end blades on the rotating shell rotating during the stirring process; the rotating drive member is enclosed in the rotating shell to drive the stirring head to rotate; the cover plate seals the rotating shell, and the ridges on the cover play an auxiliary stirring role and a structural reinforcement role. The protruding structure of the ridges produces shearing of the soil from another dimension during the rotation of the stirring head, ensuring that the edge position of the stirring area of ​​each operation is effectively stirred, preventing missed stirring and ensuring that the overlap between multiple operations meets the construction requirements.

[0012] Preferably, the active stirring blade and the fixed stirring blade both include a vertical plate and a horizontal plate, and the horizontal plate has at least one layer; the vertical plate of the active stirring blade is fixedly arranged on the rotating shell, and the vertical plate of the fixed stirring blade is fixedly arranged on the fixed support; the active stirring blade and the fixed stirring blade are arranged relative to each other, so that an overlapping cutting area is formed between the horizontal plate of the active stirring blade and the horizontal plate of the fixed stirring blade; and the horizontal plate of the active stirring blade and the horizontal plate of the fixed stirring blade are staggered in upper and lower layers. The above structure adopts a vertical plate and a horizontal plate combination structure through the active stirring blade and the fixed stirring blade. At the same time, the structure of the two groups of blades arranged in staggered layers can achieve a similar mutual shearing effect during the stirring process, so that the mixing of the curing agent and the soil is more uniform.

[0013] Preferably, the nozzle is arranged on the inner side of the vertical plate of the fixed stirring blade, and the nozzle head of the nozzle is in the shape of a necked truncated cone, that is, the nozzle head is in the shape of a gradually decreasing diameter from the inside to the outside, and a horizontal slit nozzle and a vertical slit nozzle are respectively provided on the nozzle head, or a circular nozzle is provided at the end of the nozzle head where it is closed. The above structure is more conducive to forming a better atomization effect when the curing agent is sprayed out through the slit nozzle on the isosceles trapezoidal nozzle; when a closed circular nozzle is used, the curing agent injection speed can be guaranteed, and the curing agent can be sent to a distant stirring position. The nozzle is hidden in the inner side of the fixed stirring blade to avoid clogging of the nozzle due to excessive soil pressure during the sinking and lifting process, thereby ensuring the continuous and stable output of the curing agent material and high-pressure gas.

[0014] Preferably, the angle between the horizontal plate and the tangent direction of the rotating shell is 15° to 30°. The above structure can further ensure the stirring efficiency and stirring uniformity by controlling the angle of the horizontal plate.

[0015] Preferably, the oil circuit system includes an oil inlet valve, an oil outlet valve, a control valve and a hydraulic flow meter; the oil inlet valve and the oil outlet valve are respectively arranged on the extension arm, the oil inlet valve is connected to the oil inlet part of the control valve through an oil inlet pipe, the hydraulic flow meter is connected to the port 1 of the control valve through an oil pipe, and the hydraulic flow meter is connected to the stirring rotating part of each of the stirring heads through a first driving oil pipe, the stirring rotating part of each of the stirring heads is connected to the port 2 of the control valve through a second driving oil pipe, and the oil outlet part of the control valve is connected to the oil outlet valve through an oil outlet pipe. The above structure is responsible for the circulation of the hydraulic system oil circuit through the oil inlet pipe and the oil outlet pipe, and the control valve is used to change the direction of the oil inlet and outlet to change the stirring direction of the stirring head. The first driving oil pipe and the second driving oil pipe are connected to the rotating drive member at the end of the oil circuit system, wherein the hydraulic flow meter can convert the rotation speed of the stirring head through the flow change of the hydraulic oil, and adjust the up and down operation time by real-time monitoring of the stirring head rotation speed, thereby ensuring that the mixing times of the curing agent and the soil meet the design requirements.

[0016] Preferably, it also includes a feeding backstage, which is used for solidification and stirring to provide the nozzle with a curing agent and auxiliary high-pressure gas.

[0017] Preferably, it also includes a construction carrier, the installation support plate is provided with a connecting plate, the connecting plate is provided with a pin hole, and the installation support plate is fixedly connected to the construction carrier by passing a pin shaft through the pin hole. The above structure uses the installation base plate as a connector between the in-situ curing and mixing equipment and the construction carrier, and the connection method of the pin hole and the pin shaft is relatively universal, which facilitates the combination of the in-situ curing and mixing equipment with different types of construction carriers. At the same time, the construction carrier can be reasonably selected according to different construction environments.

[0018] Preferably, the extension arm is a hollow structure, and a reinforcing rib plate is provided at the connection between the extension arm and the mounting support plate.

[0019] In summary, the advantage of the utility model is that by optimizing the structure of the stirring blades on the stirring head, the staggered stirring effect of the fixed stirring blades and the active stirring blades can be achieved, which can significantly improve the uniformity and efficiency of the mixing of the curing agent and the soil, thereby enhancing the quality of the foundation soil solidification treatment. The control valve is used to regulate the rotation direction of the stirring head, and the number of stirring times is closely monitored in combination with the flow meter, so that specific construction measures and requirements can be formulated to ensure that the operation quality of each construction area is stable and reliable. In addition, by adjusting the position and angle layout of the curing agent nozzle, the nozzle blockage can be effectively prevented, and the curing agent spraying can be made more uniform. At the same time, by setting up channel two, high-pressure gas can be used to effectively reduce the resistance during the mixing process, which is not only conducive to the mixing operation, but also helps the smooth flow and uniform mixing of the curing agent in the soil, further improving the project quality and construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of the in-situ curing and mixing equipment structure of Example 1 of the utility model.

[0021] Figure 2 This is a front view of the in-situ curing and mixing equipment structure of Example 2 of the utility model.

[0022] Figure 3 This is a front view of the in-situ curing and mixing equipment structure of Example 3 of the utility model.

[0023] Figure 4 This is a front view of a single-sided stirring head structure according to a first embodiment of the utility model.

[0024] Figure 5 This is a front view of the single-sided stirring head structure of the second embodiment of the utility model.

[0025] Figure 6 This is a front view of the single-sided stirring head structure of embodiment 3 of the present utility model.

[0026] Figure 7 This is a side view of a single-sided stirring head structure according to a first embodiment of the present utility model.

[0027] Figure 8 This is a side view of the single-sided stirring head structure of the second embodiment of the utility model.

[0028] Fig. 9 This is a cross-sectional view of the stirring head structure of the utility model.

[0029] Fig.10 This is a schematic diagram of the blade structure of the utility model.

[0030] Fig.11 This is a schematic diagram of the nozzle structure of the utility model.

[0031] Fig.12 This is a schematic diagram of the structure of the nozzle of the utility model.

[0032] Fig.13 This is a construction schematic diagram of the utility model.

[0033] Description of reference numerals:

[0034] 1. Install support plate; 11. Pin shaft; 12. Connecting plate; 13. Pin hole; 2. Extension arm; 21. Rib plate; 22. Fixed support; 3. Mixing head; 31. Active mixing blade; 32. Fixed mixing blade; 331. Vertical plate; 332. Horizontal plate; 333. Overlapping cutting area; 34. End cutter head; 35. Rotating shaft; 36. Rotating housing; 37. Rotating drive member; 38. Cover plate; 39. Edge plate; 4. Oil system; 41. Oil inlet valve; 42 , oil outlet valve; 43, control valve; 44, hydraulic flow meter; 451, oil inlet pipe; 452, oil outlet pipe; 461, first drive oil pipe; 462, second drive oil pipe; 5, transportation pipeline system; 50, mixing area; 51, channel one; 52, channel two; 53, nozzle; 531, nozzle; 54, horizontal slit nozzle; 55, vertical slit nozzle; 56, circular nozzle; 6, feeding background; 61, feeding pipe; 62, air supply pipe; 7, construction carrier. DETAILED DESCRIPTION

[0035] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0036] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0037] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] Embodiment 1

[0039] Combine the following Figure 1 , Figure 4 , Figure 7 , Figure 9~Figure 13 The utility model is further explained.

[0040] The engineering background of this embodiment is a factory building construction project in a coastal area. There are thick silt layers distributed throughout the site, and in some areas, the silt is directly exposed to the surface. This layer has the characteristics of high water content, low strength, and high compressibility. The silt layer is gray and gray-black. The silt is composed of clay particles, has a bad smell, contains organic matter, shell fragments, etc. It is soft, with a smooth knife-cut surface, and some sand particles are mixed on the top. It is saturated and plastic. In order to meet the ground bearing requirements of construction machinery such as pile drivers in the factory construction site, it is necessary to carry out shallow foundation solidification treatment on the soft soil layer in the site. The solidification depth is 2.5m. Due to the high water content of the silt, the dry spraying method is used for construction. The curing agent is PO 42.5 cement, and the addition amount is 120kg / m 3 .

[0041] like Figure 1 As shown, the in-situ solidification mixing equipment used in this embodiment includes a mounting support plate 1, an extension arm 2, a mixing head 3, an oil circuit system 4 and a conveying pipeline system 5; the upper end of the extension arm 2 is arranged on the mounting support plate 1, and this embodiment adopts three mixing heads 3, which are arranged at equal intervals along the circumferential direction at the lower end of the extension arm 2; each mixing head 3 includes a mixing fixed part and a mixing rotating part; the mixing fixed part is fixedly arranged at the lower end of the extension arm 2, and the mixing rotating part is rotatably connected to the mixing fixed part; a plurality of fixed mixing blades 32 are arranged at intervals along the circumferential direction on the outer peripheral wall of the mixing fixed part, and the mixing rotating part is arranged at equal intervals along the circumferential direction. A plurality of active stirring blades 31 are arranged at intervals along the circumferential direction on the outer wall, and the fixed stirring blades 32 and the active stirring blades 31 are arranged in a staggered manner and cut each other; a nozzle 53 is arranged on the inner side of at least one fixed stirring blade 32 on each stirring head 3; the oil circuit system 4 and the conveying pipeline system 5 are respectively arranged on the extension arm 2, the oil circuit system 4 is connected to the stirring rotating part, the oil circuit system 4 is used to drive the stirring rotating part to rotate, and the number of rotations of the stirring head is converted and recorded by the amount of flowing oil; the conveying pipeline system 5 is connected to the nozzle 53, and the conveying pipeline system 5 sprays the solidified material and high-pressure gas from the nozzle 53. The equipment can increase the stirring intensity and stirring uniformity through three stirring heads 3, and at the same time, the fixed stirring blades 32 and the active stirring blades 31 are cut each other to improve the stirring capacity, and the number of rotations of the stirring head 3 can be converted through the oil circuit system 4, and the mixing quality of the curing agent and the soil in situ can be guaranteed by the specific number of rotations data, and finally, combined with the hidden setting of the nozzle 53, blockage is prevented during the stirring operation to ensure the quality of the project.

[0042] like Figure 1 , Fig.13 As shown, the mounting support plate 1 is connected to the excavator arm through the pin shaft 11 and the pin hole 13. The excavator model is at least 220 or above. The excavator is used to control the in-situ solidification mixing equipment to mix the solidified soil vertically up and down.

[0043] like Figure 1 As shown, the extension arm 2 is a hollow structure, which effectively reduces the deadweight of the equipment, and a rib plate 21 is arranged at the position of the mounting support plate 1 for reinforcement. The total length of the extension arm 2 is 5m, which can ensure that the effective reinforcement depth meets the design requirements; the fixed support 22 is located at the bottom of the extension arm 2, and there are three fixed supports 22. The fixed support 22 and the extension arm 2 can be integrally formed or have a split structure. A stirring head 3 is installed on each fixed support 22, and the angle between the three fixed supports 22 is 130° and they are symmetrically arranged along the extension arm 2; a plurality of fixed stirring blades 32 are arranged on the outer circumference of the disk at the end of the fixed support 22 and are evenly arranged, and a total of 5 groups of fixed stirring blades 32 are provided.

[0044] like Figure 1 , Figure 4 and Figure 7 As shown, in this embodiment, the stirring head 3 includes an active stirring blade 31, a fixed stirring blade 32, an end blade 34, a rotating shaft 35, a rotating shell 36, a rotating driving member 37, a cover plate 38 and an edge plate 39; the rotating shell 36 is fixed to the fixed support 22 through the rotating shaft 35, and is the core device of the in-situ curing stirring equipment. The active stirring blades 31 that follow the synchronous rotation are arranged at equal intervals on the circumferential side of the rotating shell 36. A total of 5 groups of active stirring blades 31 are arranged. The active stirring blades 31 are located outside the circumference of the fixed stirring blades 32, and the two form an inner and outer double The structure is a layered blade structure; the end blades 34 are arranged vertically on the outer peripheral wall of the rotating shell 36, with a total of 2 groups, protruding 4cm from the surface of the rotating shell 36; the active mixing blades 31 on the rotating shell 36 and the end blades 34 rotate during the mixing process to cut the soil and perform the main mixing function; the rotating drive 37 is a hydraulic motor, which is installed inside the rotating shell 36 to drive the mixing head 3 to rotate; the outermost side of the rotating shell 36 is sealed with a cover plate 38, and a ridge plate 39 is provided on the cover plate 38 for auxiliary mixing, and the ridge plate 39 also serves as a structural reinforcement. The ridge plate 39 protrudes 3cm from the surface of the cover plate 38. The protruding structure of the ridge plate 39 produces shearing of the soil from another dimension during the rotation of the mixing head 3, ensuring that the edge position of the mixing area of ​​each operation is effectively stirred, preventing missed mixing and ensuring that the overlap between multiple operations meets the construction requirements.

[0045] like Fig.10As shown, both the active stirring blade 31 and the fixed stirring blade 32 include a vertical plate 331 and at least one layer of horizontal plate 332; in this embodiment, both the fixed stirring blade 32 and the active stirring blade 31 have a single-layer horizontal plate 332; the vertical plate 331 of the active stirring blade 31 is fixedly arranged on the rotating shell 36, and the vertical plate 331 of the fixed stirring blade 32 is fixedly arranged on the fixed support 22; the horizontal plate 332 on the active stirring blade 31 and the fixed stirring blade 32 is 25° in the tangent direction with the rotating shell 36. The control of the angle of the horizontal plate 332 can further improve the stirring efficiency and the uniformity of stirring. The active stirring blade 31 and the fixed stirring blade 32 are arranged relative to each other, so that an overlapping cutting area 333 is formed between the horizontal plate 332 of the active stirring blade 31 and the horizontal plate 332 of the fixed stirring blade 32; and the horizontal plate 332 of the active stirring blade 31 and the horizontal plate 332 of the fixed stirring blade 32 are distributed in an upper and lower double layer. The staggered arrangement of the two sets of blades can achieve a similar mutual shearing effect during the mixing process, making the curing agent and the soil mixed more evenly.

[0046] like Fig. 9 As shown, the oil circuit system 4 includes an oil inlet valve 41, an oil outlet valve 42, a control valve 43 and a hydraulic flow meter 44; the oil inlet valve 41 and the oil outlet valve 42 are respectively arranged on the extension arm 2, the oil inlet valve 41 is connected to the oil inlet part of the control valve 43 through an oil inlet pipe 451, the hydraulic flow meter 44 is connected to the port one of the control valve 43 through an oil pipe, and the hydraulic flow meter 44 is connected to the stirring rotating part of each stirring head 3 through a first driving oil pipe 461, the stirring rotating part of each stirring head 3 is connected to the port two of the control valve 43 through an oil pipe through a second driving oil pipe 462, and the oil outlet of the control valve 43 is connected to the oil outlet valve 42 through an oil outlet pipe 452. The above structure is responsible for the circulation of the hydraulic system oil circuit through the oil inlet pipe 451 and the oil outlet pipe 452, and uses the control valve 43 to change the inlet and outlet oil directions and thus change the stirring direction of the stirring head. The first drive oil pipe 461 and the second drive oil pipe 462 are connected to the hydraulic motor at the end of the oil circuit system, wherein the hydraulic flow meter 44 can convert the rotation speed of the stirring head 3 through the flow change of the hydraulic oil, and adjust the up and down operation time by real-time monitoring of the rotation speed of the stirring head 3, thereby ensuring that the mixing times of the curing agent and the soil meet the design requirements.

[0047] like Figure 1 , Fig.11 , Fig.12As shown in (a), the conveying pipeline system 5 includes a channel 1 51 and a channel 2 52; both the channel 1 51 and the channel 2 52 can be used to convey one or more of curing agent powder, curing agent slurry or high-pressure gas according to different construction requirements. The high-pressure gas can reduce the stirring resistance during stirring and also help to evenly spread the curing agent. In this embodiment, dry construction is adopted, the channel 1 51 is for cement dry powder to pass through, and the channel 2 52 is connected to the air supply pipe 62 of the external feeding backstage 6 to transport auxiliary high-pressure gas to assist stirring; the lower ends of the two channels extend to the bottom of the outer side of the mixing head 3 respectively, and are connected and merged at the bottom of the outer side of the mixing head 3 to form a mixing area 50; each mixing head 3 is provided with a nozzle 53, and the nozzle 53 is arranged on the inner side of the vertical plate 331 of the fixed stirring blade 32, each nozzle 53 is connected with the mixing area 50 through a branch channel, and the angle between two adjacent nozzles 53 is the same as the angle between two adjacent mixing heads 3. The nozzle 531 of each nozzle 53 is truncated cone-shaped, that is, the diameter of the nozzle 531 gradually decreases from the inside to the outside. The nozzle 531 is provided with two aligned horizontal slit nozzles 54 and one vertical slit nozzle 55, which are used to supply materials and gas to the soil. The nozzle 53 is hidden inside the fixed mixing blade 32 to avoid the nozzle being blocked due to excessive soil pressure during the sinking and lifting process, thereby ensuring the continuous and stable output of cement powder and high-pressure gas.

[0048] like Fig.13 As shown, it also includes a feeding backstage 6 and a construction carrier 7, which are connected to the conveying pipeline system 5 through a feeding pipe 61 and an air supply pipe 62. The feeding backstage 6 is used for curing and stirring to provide curing agent and auxiliary high-pressure gas; the mounting support plate 1 is fixedly connected to the construction carrier 7 by passing the pin shaft 11 through the pin hole 13.

[0049] like Fig.13 As shown, the construction method of the in-situ curing and mixing equipment in this embodiment is as follows:

[0050] (a) Before construction, the area planned for solidification treatment shall be marked out and divided into construction areas. If there are areas with large cross-sectional changes, the treatment blocks can be adjusted accordingly to facilitate construction.

[0051] (b) The in-situ solidification mixing equipment is fixed to the front end of the excavator or other construction carrier 7 through the connecting plate 12, the pin shaft 11 and the pin hole 13; the valves, controllers and oil pipes in the oil system 4 that drives the mixing head 3 to rotate are connected in sequence and communicated with the hydraulic function system of the construction carrier 7; at the same time, the conveying pipeline system 5 is connected with the feeding backstage 6 through the feeding pipe 61 and the air supply pipe 62 to provide cement and auxiliary high-pressure gas for solidification mixing.

[0052] (c) After the construction equipment is in place, the feeding stage 6 starts to transport cement powder using high-pressure gas in the form of pneumatic conveying through the feeding pipe 61. At the same time, the feeding stage 6 starts to provide high-pressure gas for solidification and mixing through the gas supply pipe 62. When the curing agent material and the high-pressure gas are transported to the mixing head 3, the mixing construction begins.

[0053] (d) During the on-site mixing construction process, according to the moisture content of the original soil on site and the form of the curing agent, a vertical up and down mixing and curing method is adopted. The mixing equipment is vertically inserted into the original soil for mixing. The active mixing blades 31 on the mixing head 3 rotate forward with the rotating shell 36, while the fixed mixing blades 32 on the mixing head 3 remain stationary. The two sets of blades can achieve the effect of staggered mixing during the mixing operation. During the construction, the mixing is gradually deepened and the curing agent material and high-pressure gas are continuously sprayed until the curing design depth is reached. In order to ensure the mixing effect at the bottom, the mixing equipment slows down the advance speed appropriately near the bottom and stays at the bottom for at least 10 seconds, and then performs a reverse rotation spraying and lifting operation until the mixing head 3 is completely raised to the surface, and the mixing operation is completed.

[0054] (e) Move to the next work location and repeat step (d) to carry out the work. During the construction process, ensure that the overlap width of the two work areas is not less than 5 cm.

[0055] (f) After the solidification construction is completed, the surface of the solidification area is compacted, leveled and maintained by engineering machinery to improve the bearing capacity of the foundation in the solidification area.

[0056] Embodiment 2

[0057] Combine the following Figure 2 , Figure 5 , Figure 8~Figure 11 , Fig.12 (b) and Fig.13 The utility model is further described.

[0058] The engineering background of this embodiment is the construction project of an industrial park near a river. Since the proposed site was originally a fish and crab farm, the surface of the site is a silt layer, and the lower layer is a thick soft soil layer. The silt layer contains organic matter and humus; the soft soil layer has high water content, low bearing capacity, and high compressibility. In order to ensure that the construction machinery, such as excavators and loaders, can walk normally in the site during the construction process, the soft soil of the site must be reinforced. The reinforcement depth is set to 5 meters. In view of the high water content of the soft soil, we choose the wet spraying method for construction, and the curing agent uses KD curing agent, and the mixing ratio is set to 100kg / m³.

[0059] The in-situ curing and stirring equipment used in this embodiment is similar to that in the first embodiment, except that:

[0060] Since the reinforcement depth in this project is 5m, the total length of the extension arm 2 in the mixing equipment is 7m, and the maximum operating depth can reach 6m; there are two mixing heads 3 at the end of the equipment, and the angle between the two mixing heads 3 is 135° and they are arranged symmetrically; there are 4 groups of fixed mixing blades 32 and active mixing blades 31, which are arranged on the fixed support 22 and the rotating shell 36 respectively. The cross plate 332 of the active mixing blade 31 is located on the inner side of the cross plate 332 of the fixed mixing blade 32, and the protruding height is 25cm. Each blade includes a layer of cross plate 332. , the two form a double-layer blade structure and form a staggered mixing effect; the end blade 34 is provided with 4 groups, protruding 5cm from the surface of the rotating shell 36; the edge plate 39 on the cover plate 38 protrudes 5cm from the surface of the cover plate; the active stirring blade 31 and the horizontal plate 332 of the fixed stirring blade 32 are at an angle of 20° to the tangent direction of the circular rotating shell 36; the channel 1 51 in the conveying pipeline system 5 is used for conveying the curing agent slurry, and nozzles 53 are respectively provided in the inner layers of the fixed stirring blades 32 of the two stirring heads 3, and the nozzles on the nozzles 531 are adopted as follows Fig.12 (b) A closed circular nozzle 56.

[0061] The construction method in this embodiment is the same as that in the first embodiment and will not be described again here.

[0062] Embodiment 3

[0063] like Figure 3 , Figure 6 As shown, in this embodiment, the reinforcement depth is 4.5m, the total length of the extension arm 2 and the stirring head 3 of the stirring equipment is 5.5m, and two stirring heads 3 are used at the end of the equipment, which are symmetrically arranged with an angle of 140°; the fixed stirring blades 32 and the active stirring blades 31 are both in 3 groups, and each blade is provided with two layers of transverse plates 332, and the adjacent transverse plates 332 are staggered. The structure of multiple transverse plates can obtain more effective stirring times under the same rotation speed and sinking and lifting speed; the remaining structure is the same as that of Example 2 and will not be repeated here.

[0064] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0065] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0066] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An in-situ curing and stirring device, characterized in that: The invention comprises a mounting support plate (1), an extension arm (2), at least two stirring heads (3) and an oil circuit system (4); the upper end of the extension arm (2) is arranged on the mounting support plate (1), and a plurality of stirring heads (3) are arranged at intervals along the circumferential direction at the lower end of the extension arm (2); each stirring head (3) comprises a stirring fixed part and a stirring rotating part; the stirring fixed part is fixedly arranged at the lower end of the extension arm (2), and the stirring rotating part is rotatably connected to the stirring fixed part; a plurality of fixed stirring blades are arranged at intervals along the circumferential direction on the outer peripheral wall of the stirring fixed part (32), a plurality of active stirring blades (31) are arranged at intervals along the circumferential direction on the outer peripheral wall of the stirring rotating part, and the fixed stirring blades (32) and the active stirring blades (31) are arranged in a staggered manner and cut into each other; a nozzle (53) is arranged on the inner side of at least one of the fixed stirring blades (32) on each stirring head (3); the oil circuit system (4) is arranged on the extension arm (2), the oil circuit system (4) is connected to the stirring rotating part, and the oil circuit system (4) is used to drive the stirring rotating part to rotate, and at the same time, the number of rotations is converted and recorded by the amount of flowing oil.

2. The in-situ curing and stirring device according to claim 1, characterized in that: The stirring fixed part is a fixed support (22); the fixed support (22) is fixedly arranged at the lower end of the extension arm (2); the fixed stirring blades (32) are arranged on the outer peripheral wall of the fixed support (22) at intervals along the circumferential direction; the stirring rotating part comprises a rotating shaft (35), a rotating shell (36) and a rotating driving member (37); the rotating driving member (37) is arranged in the fixed support (22) and provides a rotating power; the rotating shell (36) is rotatably connected to the fixed support (22) via the rotating shaft (35), and the rotating shaft (35) is fixedly connected to the driving part of the rotating driving member (37); the active stirring blades (31) are arranged on the outer peripheral wall of the rotating shell (36) at intervals along the circumferential direction.

3. The in-situ curing and stirring device according to claim 2, characterized in that: The end of the rotating shell (36) is provided with end blades (34) arranged in a circumferentially spaced arrangement; the bottom surface of the rotating shell (36) is provided with a cover plate (38); a plurality of ridges (39) are arranged along the diameter of the cover plate (38); the ridges (39) protrude from the cover plate (38) by 3 to 5 cm.

4. The in-situ curing and stirring device according to claim 2, characterized in that: The active stirring blade (31) and the fixed stirring blade (32) both comprise a vertical plate (331) and a horizontal plate (332), and the horizontal plate (332) has at least one layer; the vertical plate (331) of the active stirring blade (31) is fixedly arranged on a rotating shell (36), and the vertical plate (331) of the fixed stirring blade (32) is fixedly arranged on a fixed support (22); the active stirring blade (31) and the fixed stirring blade (32) are arranged relative to each other, so that an overlapping cutting area (333) is formed between the horizontal plate (332) of the active stirring blade (31) and the horizontal plate (332) of the fixed stirring blade (32); and the horizontal plate (332) of the active stirring blade (31) and the horizontal plate (332) of the fixed stirring blade (32) are distributed in upper and lower staggered layers.

5. The in-situ curing and stirring device according to claim 4, characterized in that: The nozzle (53) is arranged on the inner side of the vertical plate (331) that fixes the stirring blade (32), and each of the stirring heads (3) is provided with the nozzle (53). The nozzle (531) of each of the nozzles (53) is in the shape of an isosceles trapezoid, and the diameter of the nozzle (531) gradually decreases from the inside to the outside. The nozzle (531) is respectively provided with a horizontal slit-shaped nozzle (54) and a vertical slit-shaped nozzle (55), or a circular nozzle (56) is provided at the end of the nozzle (531) where the nozzle (531) closes.

6. The in-situ curing and stirring device according to claim 4, characterized in that: The included angle between the horizontal plate (332) and the tangent direction of the rotating housing (36) is 15° to 30°.

7. The in-situ curing and stirring device according to claim 1, characterized in that: The oil circuit system (4) comprises an oil inlet valve (41), an oil outlet valve (42), a control valve (43) and a hydraulic flow meter (44); the oil inlet valve (41) and the oil outlet valve (42) are respectively arranged on the extension arm (2); the oil inlet valve (41) is connected to the oil inlet part of the control valve (43) via an oil inlet pipe (451); the hydraulic flow meter (44) is connected to port 1 of the control valve (43) via an oil pipe; the hydraulic flow meter (44) is connected to the stirring rotating part of each stirring head (3) via a first driving oil pipe (461); the stirring rotating part of each stirring head (3) is connected to port 2 of the control valve (43) via an oil pipe via a second driving oil pipe (462); and the oil outlet of the control valve (43) is connected to the oil outlet valve (42) via an oil outlet pipe (452).

8. The in-situ curing and stirring device according to claim 1, characterized in that: It also includes a material supply backstage (6), wherein the material supply backstage (6) is used for solidification and stirring to provide a solidifying agent and auxiliary high-pressure gas to the nozzle (53).

9. The in-situ curing and stirring device according to claim 1, characterized in that: It also comprises a construction carrier (7), wherein a connecting plate (12) is arranged on the installation support plate (1), and a pin hole (13) is provided on the connecting plate (12), and the installation support plate (1) is fixedly connected to the construction carrier (7) by a pin shaft (11) passing through the pin hole (13).

10. The in-situ curing and stirring device according to claim 1, characterized in that: The extension arm (2) is a hollow structure, and a reinforcing rib plate (21) is provided at the connection between the extension arm (2) and the mounting support plate (1).

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