Mixing device for improving site loam based on MICP and loam improving equipment

Abstract

The mixing device comprises a seepage mechanism and a soil loosening mechanism, the seepage mechanism comprises a liquid outlet cylinder and a seepage head, the liquid outlet cylinder can move up and down along the axis of the liquid outlet cylinder, the top end of the liquid outlet cylinder is communicated with a liquid inlet pipe, the opening end of a seepage blind pipe is communicated with the bottom end of the liquid outlet cylinder, and the opening end of the seepage blind pipe is communicated with the soil loosening mechanism. A plurality of one-way liquid outlet holes are formed in the side wall of the seepage blind pipe; the soil loosening mechanism comprises a cylindrical soil loosening head body, a first cavity is formed in the soil loosening head body, the first cavity and the soil loosening head body are coaxial, the first cavity is communicated with a high-pressure air source, a plurality of exhaust holes communicated with the first cavity are formed in the side wall of the soil loosening head body, and a drill bit is arranged at the bottom of the soil loosening head. Compared with the prior art, by improving the seepage mechanism and the soil loosening mechanism, the technical problem that bacterial liquid cannot permeate into the soil body by means of gravity and matrix absorption force is solved.

Description

Technical Field

[0001] The utility model belongs to the field of foundation reinforcement in civil engineering. More specifically, it relates to a mixing device for improving in-situ loam based on MICP, and the utility model also relates to an improvement device for loam. Background Technique

[0002] Compared with traditional foundation treatment methods, the MICP technology has the advantages of simple construction, high economic efficiency, environmental friendliness, etc., and thus has extremely high engineering application potential. The essence of MICP is a process in which a certain type of bacteria in nature is utilized, and its metabolism can produce urease that decomposes urea, and the carbonate ions generated after the decomposition of urea combine with free metal cations in nature to form gel crystals.

[0003] Before injecting the bacterial liquid into the construction area to be treated, it is necessary to conduct a pre-experiment on the soil samples collected on-site. During the pre-experiment process, a stirring device is generally used to stir the soil materials in the indoor test. The test soil volume is small, and the test range and applicable conditions are limited. It is impossible to replicate the material usage data in the experimental process one-to-one to the large-scale MICP solidification project of silty loam outdoors. Moreover, different from the MICP solidification of sandy soil, the permeability coefficient of cohesive soil, especially silty loam, is generally very low, and the bacterial liquid cannot penetrate into the soil body by gravity and matrix suction. Therefore, it is often necessary to stir the bacterial liquid so that the bacterial liquid can be evenly distributed inside the soil body. All in all, the bacterial liquid mixing process is the main problem restricting the application of MICP solidified silty loam to the actual on-site solidification project, and most of the existing equipment cannot meet the actual engineering needs and urgent improvement is needed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a mixing device for improving in-situ loam based on MICP to solve the technical problem that the bacterial liquid cannot penetrate into the soil body by gravity and matrix absorption force.

[0005] To achieve the above object, the technical solution adopted by the utility model is: to provide a mixing device for improving in-situ loam based on MICP, including:

[0006] A liquid seepage mechanism, including a liquid outlet cylinder and a liquid seepage head. The liquid outlet cylinder can move up and down along its own axis. The top end of the liquid outlet cylinder is communicated with a liquid inlet pipe. The open end of the liquid seepage blind pipe is communicated with the bottom end of the liquid outlet cylinder. A plurality of one-way liquid outlet holes are opened on the side wall of the liquid seepage blind pipe, and the liquid outlet direction of the one-way liquid outlet hole is away from the liquid seepage blind pipe;

[0007] The soil loosening mechanism includes a cylindrical soil loosening head body. A first chamber is formed inside the soil loosening head body. The first chamber is coaxial with the soil loosening head body and is communicated with a high-pressure air source. A plurality of exhaust holes communicated with the first chamber are provided on the side wall of the soil loosening head body, and a drill bit is provided at the bottom of the soil loosening head.

[0008] In a possible implementation manner, a baffle is provided at the top of the soil loosening head body. The plate surface of the baffle is perpendicular to the axis of the soil loosening head body. The baffle is provided with an avoidance hole, and the liquid outlet cylinder and the liquid seepage blind pipe can pass through the avoidance hole in the up and down direction.

[0009] In a possible implementation manner, a plurality of evenly spaced diamond-shaped protrusions are provided on the outer periphery of the soil loosening head body, and the exhaust holes are located between two adjacent vertically arranged diamond-shaped protrusions.

[0010] In a possible implementation manner, a plurality of the liquid outlet cylinders are provided on the baffle, and a liquid seepage head is provided at the bottom of each liquid outlet cylinder.

[0011] In a possible implementation manner, a lifting lug is provided on the side of the baffle away from the soil loosening head body;

[0012] The mixing device for improving in-situ loam based on MICP further includes a lifting assembly. The lifting assembly includes a hook, a lifting rope and a driving motor. One end of the lifting rope is connected to the hook, and the other end can be wound around the power output shaft of the driving motor. The driving motor can drive the hook to move up and down, and the lifting lug is hooked to the hook.

[0013] In a possible implementation manner, the mixing device for improving in-situ loam based on MICP further includes a support frame. The baffle is slidably arranged on one side of the support frame in the up and down direction. The driving motor is arranged on the other side of the support frame, and the driving motor can drive the baffle to move up and down. A counterweight is provided on the upper plate surface of the baffle.

[0014] In a possible implementation manner, the liquid seepage mechanism further includes a one-way flap coil spring. The one-way flap is swingably hinged to the outer periphery of the liquid seepage blind pipe, and the one-way flap can cover the one-way liquid outlet hole. The coil spring is sleeved on the hinge shaft of the one-way flap, and the coil spring is configured to have a pre-tightening force that makes the one-way flap closely adhere to the liquid seepage blind pipe.

[0015] In a possible implementation manner, the drill bit is formed with a plurality of soil-breaking edges evenly arranged around the axis of the soil loosening head body.

[0016] Compared with the prior art, the beneficial effects of the mixing device for improving in-situ loam based on MICP provided by the present utility model are as follows:

[0017] First, the drill bit in the present utility model facilitates the insertion of the soil loosening head body into the loam, and then the high-pressure gas generated by the insertion of the soil loosening head into the loam can be used to fluff the loam. Secondly, the fluffed loam is convenient for the insertion of the liquid seepage blind pipe, and it is also beneficial to the seepage of the bacterial liquid in the liquid seepage blind pipe. Moreover, the fluffed loam particles are refined, improving the water absorption of the loam, enabling the bacterial liquid to penetrate into the soil body by gravity and the absorption force of the loam, thus facilitating the rapid mixing of the seeped bacterial liquid with the fluffed loam. In addition to the above beneficial effects, the present utility model does not require a specific stirring device to mix the loam and the bacterial liquid, solving the technical problem that the existing stirring device is prone to damage due to foreign objects such as stones in the loam during the stirring process.

[0018] Another object of the present utility model is to provide an equipment for improving loam, including the mixing device for improving on-site loam based on MICP described above.

[0019] Compared with the prior art, the equipment for improving loam in the present utility model has all the beneficial effects of the above-mentioned mixing device for improving on-site loam based on MICP, and will not be repeated here. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0021] Figure 1 is the overall structural schematic diagram of the mixing device for improving on-site loam based on MICP provided by the present utility model;

[0022] Figure 2 is the connection relationship schematic diagram of the liquid seepage mechanism and the soil loosening mechanism in the mixing device for improving on-site loam based on MICP provided by the present utility model;

[0023] Figure 3 is the bottom view of the mixing device for improving on-site loam based on MICP provided by the present utility model.

[0024] In the figure:

[0025] 1. Liquid seepage mechanism; 11. Liquid outlet cylinder; 12. Liquid seepage blind pipe; 13. One-way flap; 131. Torsion spring;

[0026] 2. Soil loosening mechanism; 21. Soil loosening head body; 210. Exhaust hole; 211. Drill bit; 212. Baffle; 213. Counterweight; 214. Rhombic protrusion; 215. Suspension ear;

[0027] 3. Lifting assembly; 31. Support frame. Detailed implementation manners

[0028] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0029] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0030] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connection member" should be understood in a broad sense. For example, the connection 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, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0032] Please refer to Figures 1 to 3 , and now the mixing device for improving in-situ loam based on MICP provided by the present utility model will be described. The mixing device for improving in-situ loam based on MICP includes a liquid seepage mechanism 1 and a soil loosening mechanism 2. Among them, the liquid seepage mechanism 1 includes a liquid outlet cylinder 11 and a liquid seepage head. The liquid outlet cylinder 11 can move up and down along its own axis. The top end of the liquid outlet cylinder 11 is communicated with a liquid inlet pipe. The open end of the liquid seepage blind pipe 12 is communicated with the bottom end of the liquid outlet cylinder 11. A plurality of one-way liquid outlet holes are formed in the side wall of the liquid seepage blind pipe 12, and the liquid outlet direction of the one-way liquid outlet holes is away from the liquid seepage blind pipe; the soil loosening mechanism 2 includes a cylindrical soil loosening head body 21. A first chamber is formed inside the soil loosening head body 21. The first chamber is coaxial with the soil loosening head body 21 and is communicated with a high-pressure gas source. A plurality of exhaust holes 210 communicated with the first chamber are provided on the side wall of the soil loosening head body 21, and a drill bit 211 is provided at the bottom of the soil loosening head.

[0033] Compared with the prior art, the drill bit 211 in this embodiment facilitates the insertion of the soil loosening head body 21 into the loam, and then the high-pressure gas generated by the insertion of the soil loosening head into the loam can be used to fluff the loam. Secondly, the fluffed loam is convenient for the insertion of the liquid seepage blind pipe 12, and is also beneficial to the seepage of the bacterial liquid in the liquid seepage blind pipe 12. Moreover, the fluffed loam particles are refined, improving the water absorption of the loam, enabling the bacterial liquid to penetrate into the soil body by gravity and the absorption force of the loam, thus facilitating the rapid mixing of the seeped bacterial liquid and the fluffed loam. In addition to the above beneficial effects, this embodiment does not require a specific stirring device to mix the loam and the bacterial liquid, solving the technical problem that the existing stirring device is prone to damage due to foreign matters such as stones in the loam during the stirring process.

[0034] Based on the above embodiment, in order to prevent the soil loosening head body 21 from being inserted too deep into the loam, a feasible implementation method is proposed. Specifically, a baffle 212 is provided at the top of the soil loosening head body 21 in this embodiment. The plate surface of the baffle 212 is perpendicular to the axis of the soil loosening head body 21, and the baffle 212 is provided with an avoidance hole. The liquid outlet cylinder 11 and the liquid seepage blind pipe 12 can pass through the avoidance hole in the up and down direction. With such a setting, the baffle 212 can prevent the soil loosening head body 21 from being inserted too deep into the loam, and is beneficial to keeping the insertion depth of the soil loosening head body 21 inserted in each area consistent, and then can keep the thickness of the bacterial liquid mixing layer of the loam consistent. In addition, in order to facilitate the setting of the air supply pipeline, a connection hole communicating with the first chamber is provided on the baffle 212.

[0035] Considering that during the insertion of the soil loosening head body 21 into the loam, the loam is likely to squeeze the soil loosening head body 21 and block the exhaust holes 210, resulting in poor exhaust of the soil loosening head body 21. To solve this problem, in a feasible implementation method, a plurality of evenly spaced diamond-shaped protrusions 214 are provided on the outer periphery of the soil loosening head body 21, and the exhaust holes 210 are located between two adjacent vertically arranged diamond-shaped protrusions 214. During the insertion of the soil loosening head body 21 into the loam, the diamond-shaped protrusions 214 can tear the soil in the corresponding area of the exhaust holes 210, and then form gaps in the adjacent areas of the exhaust holes 210, so as to prevent the loam from blocking the exhaust holes 210 and also facilitate the high-pressure air flow ejected from the exhaust holes 210 to disperse the soil.

[0036] In a feasible implementation method, a plurality of liquid outlet cylinders 11 are provided on the baffle 212, and a liquid seepage head is provided at the bottom of each liquid outlet cylinder 11. With such a setting, this embodiment can increase the liquid output of the bacterial liquid through the plurality of liquid outlet cylinders 11 and improve the mixing efficiency of the on-site loam.

[0037] It should be noted that, considering that after the loosening head body 21 loosens the loam, the loosening head and the seepage blind pipe 12 are more convenient to move in the loam, in this case, in order to prevent the bacterial liquid in the seepage blind pipe 12 from entering the loosening head body 21, the loosening head body 21 can be first extracted from the loam, and then the bacterial liquid can be added to the loam.

[0038] Based on the above embodiment, in order to facilitate the extraction of the loosening head body 21 in the loam, in a feasible implementation, a lifting lug 215 is provided on the side of the baffle 212 away from the loosening head body 21; the mixing device for improving the on-site loam based on MICP also includes a lifting assembly 3, the lifting assembly 3 includes a hook, a lifting rope and a driving motor, one end of the lifting rope is connected to the hook, and the other end can be wound around the power output shaft of the driving motor, the driving motor can drive the hook to move up and down, and the lifting lug 215 is hooked to the hook. In this embodiment, the driving motor is driven by electricity to make more of the lifting rope converge on the power output shaft of the driving motor, and the lifting rope drives the hook to move up and down in the process of winding around the power output shaft, thereby driving the loosening head body 21 out of the loam.

[0039] In a feasible embodiment, the mixing device for improving on-site loam based on MICP further includes a support frame 31, a baffle 212 is slidably arranged on one side of the support frame 31 in the up-down direction, a driving motor is arranged on the other side of the support frame 31, and the driving motor can drive the baffle 212 to move up and down, and a counterweight 213 is arranged on the upper plate surface of the baffle 212; in this way, the counterweight 213 can accumulate more gravitational potential energy for the loosening head body 21 during the up-down movement of the baffle 212, making it easier for the loosening head body 21 to be inserted into the loam. In addition, the counterweight 213 can also press the loosening head body 21 to prevent the loosening head body 21 from collapsing from the loam and injuring people during the process of ejecting high-pressure airflow.

[0040] In a feasible embodiment, the seepage mechanism 1 further includes a one-way paddle 13 and a coil spring 131. The one-way paddle 13 is swingably hinged to the outer periphery of the seepage blind tube 12, and the one-way paddle 13 can cover a one-way liquid outlet. The coil spring 131 is sleeved on the hinge axis of the one-way paddle 13, and the coil spring 131 is configured to have a pre-tightening force that makes the one-way paddle 13 close to the seepage blind tube 12. In this embodiment, the coil spring 131 can drive the one-way paddle 13 to close to the outer periphery of the seepage blind tube 12 to prevent particles in the loam from falling into the seepage blind tube 12 when the seepage blind tube 12 is inserted into the loam. When the seepage blind tube 12 releases bacterial liquid outward, the one-way paddle 13 is pressed to swing to the side away from the seepage blind tube 12 to facilitate the outflow of the bacterial liquid.

[0041] In a feasible implementation, the drill bit 211 is formed with a plurality of soil-breaking edges uniformly arranged around the axis of the soil-loosening head body 21. With such an arrangement, the soil-breaking edges can break through the loam first, facilitating the subsequent entry of the soil-loosening head body into the interior of the loam, and the soil-breaking edges can first tear the loam to form gaps in the loam, so as to facilitate the subsequent loosening of the loam by air flow.

[0042] In summary, the drill bit 211 in the present utility model facilitates the insertion of the soil-loosening head body 21 into the interior of the loam. The soil-breaking edges provided on the drill bit 211 and the diamond-shaped protrusions 214 provided on the soil-loosening head body 21 facilitate tearing the loam, and then the high-pressure gas generated by inserting the soil-loosening head into the loam can be used to fluff the loam; secondly, the fluffed loam facilitates the insertion of the liquid-permeating blind pipe 12, and is also beneficial to the seepage of the bacterial liquid in the liquid-permeating blind pipe 12; the one-way through holes provided in the liquid-permeating blind pipe 12 can not only allow the internal bacterial liquid to flow into the loam, but also prevent the particulate matter of the loam from entering the liquid-permeating blind pipe 12. Moreover, the fluffed loam particles are refined, improving the water absorption of the loam, enabling the bacterial liquid to penetrate into the soil body through gravity and the absorption force of the loam, thus facilitating the rapid mixing of the seeped bacterial liquid and the fluffed loam; in addition to the above beneficial effects, the present utility model does not require a specific stirring device to mix the loam and the bacterial liquid, solving the technical problem that the existing stirring device is easily damaged due to the presence of foreign matters such as stones in the loam during the stirring process.

[0043] Based on the same inventive concept, the present utility model also proposes a loam improvement device, which includes the above-mentioned mixing device for improving on-site loam based on MICP.

[0044] Compared with the prior art, the loam improvement device in the present utility model has all the beneficial effects of the above-mentioned mixing device for improving on-site loam based on MICP, and will not be elaborated here.

[0045] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A mixing device for improving in-situ loam based on MICP, characterized in that, Comprising: A liquid seepage mechanism (1), including a liquid outlet cylinder (11) and a liquid seepage blind pipe (12). The liquid outlet cylinder (11) can move up and down along its own axis. The top end of the liquid outlet cylinder (11) is communicated with a liquid inlet pipe. The open end of the liquid seepage blind pipe (12) is communicated with the bottom end of the liquid outlet cylinder (11). A plurality of one-way liquid outlet holes are formed in the side wall of the liquid seepage blind pipe (12), and the liquid outlet direction of the one-way liquid outlet holes is away from the liquid seepage blind pipe (12); A soil loosening mechanism (2), including a cylindrical soil loosening head body (21). A first chamber is formed inside the soil loosening head body (21). The first chamber is coaxial with the soil loosening head body (21) and is communicated with a high-pressure air source. A plurality of exhaust holes (210) communicated with the first chamber are provided on the side wall of the soil loosening head body (21). A drill bit (211) is provided at the bottom of the soil loosening head.

2. The mixing device for improving in-situ loam based on MICP according to claim 1, wherein A baffle (212) is provided at the top of the soil loosening head body (21). The plate surface of the baffle (212) is perpendicular to the axis of the soil loosening head body (21). An avoidance hole is formed in the baffle (212). The liquid outlet cylinder (11) and the liquid seepage blind pipe (12) can pass through the avoidance hole in the up and down direction.

3. The mixing device for improving in-situ loam based on MICP according to claim 1, wherein, A plurality of evenly spaced diamond-shaped protrusions (214) are provided on the outer periphery of the soil loosening head body (21). The exhaust holes (210) are located between two adjacent vertically arranged diamond-shaped protrusions (214).

4. The mixing device for improving in-situ loam based on MICP according to claim 2, characterized in that, A plurality of the liquid outlet cylinders (11) are provided on the baffle (212). A liquid seepage head is provided at the bottom of each liquid outlet cylinder (11).

5. The mixing device for improving in-situ loam based on MICP according to claim 2, characterized in that, A lifting lug (215) is provided on the side of the baffle (212) away from the soil loosening head body (21); The mixing device for improving in-situ loam based on MICP further includes a lifting assembly (3). The lifting assembly (3) includes a hook, a lifting rope and a driving motor. One end of the lifting rope is connected to the hook, and the other end can be wound around the power output shaft of the driving motor. The driving motor can drive the hook to move up and down, and the lifting lug (215) is hooked to the hook.

6. The mixing device for improving in-situ loam based on MICP according to claim 5, wherein, The mixing device for improving in-situ loam based on MICP further includes a support frame (31). The baffle (212) is slidably arranged on one side of the support frame (31) in the up and down direction. The driving motor is arranged on the other side of the support frame (31), and the driving motor can drive the baffle (212) to move up and down. A counterweight block (213) is provided on the upper plate surface of the baffle (212).

7. The mixing device for improving in-situ loam based on MICP according to claim 5, characterized in that, The liquid seepage mechanism (1) further includes a one-way flap (13) and a torsion spring (131). The one-way flap (13) is swingably hinged to the outer periphery of the liquid seepage blind pipe (12), and the one-way flap (13) can cover the one-way liquid outlet holes. The torsion spring (131) is sleeved on the hinge shaft of the one-way flap (13), and the torsion spring (131) is configured to have a pre-tightening force for making the one-way flap (13) closely adhere to the liquid seepage blind pipe (12).

8. The mixing device for improving in-situ loam based on MICP according to claim 3, characterized in that, The drill bit (211) is formed with a plurality of soil-breaking edges evenly arranged around the axis of the soil loosening head body (21).

9. An improved device for loam, characterized in that, Comprising a mixing device for improving in-situ loam based on MICP as described in any one of claims 1 to 8.

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