A mobile wide-area soft soil solidification device

Abstract

The present invention discloses a mobile wide-area soft soil solidification device, including a bracket, an outer sleeve with closed ends is provided inside the bracket, an inner sleeve is provided inside the outer sleeve, a driving block is provided on the output end of each hydraulic cylinder, a vibration tube is provided in chamber I, the upper end of the vibration tube is open and the lower end is closed, the upper end of the vibration tube is connected to the lower surface of the driving block through a spring, and the lower end of the vibration tube is movable through the inner sleeve and the outer sleeve in turn and then extends downward; the upper end of the telescopic tube is connected to the lower surface of the driving block of chamber II, and the lower end of the telescopic tube is movable through the inner sleeve and the outer sleeve in turn and then extends downward, and a stirrer is provided on the extension section of the telescopic tube. The present invention is based on a mobile bearing platform, and uses vibration and rotation stirring to reduce the moving resistance of the solidification device, and simultaneously injects grout into the soft soil area, thereby realizing efficient reinforcement treatment of wide-area soft soil foundation.

Description

Technical Field

[0001] The invention relates to the field of soft soil foundation reinforcement, and in particular to a mobile wide-area soft soil solidification device. Background Art

[0002] With the in-depth implementation of my country's strategic deployment of building a strong maritime nation, large-scale beach functional transformation projects have been booming to meet the needs of landscape shaping and public leisure. Since most of these projects are located in marine soft soil areas, marine soft soil has the characteristics of high water content, high compressibility, and low strength. Before foundation construction, the foundation soil layer often needs to be reinforced to meet the bearing capacity requirements of the building. At present, the common methods to improve the bearing capacity of soft soil foundations are preloading and in-situ solidification. The preloading method can be divided into two methods: vacuum preloading and surcharge preloading. The vacuum preloading method usually sets up vertical drainage bodies such as sand wells (bag sand wells or plastic drainage belts) in the foundation first, and then uses the weight of the building itself to load step by step; the surcharge preloading method is to preload the foundation so that the soil is gradually drained and consolidated, and the foundation is gradually improved. However, the preloading method often requires a large amount of surcharge materials and generally takes a long time. In the case of deep saturated soft soil, drainage and consolidation take longer, which often leads to a significant increase in construction period costs. The in-situ solidification method usually uses solidification materials such as cement, industrial waste and other admixtures to in-situ solidify and improve the soft soil foundation, so that it forms a hard shell layer or plate with higher strength to meet the bearing capacity requirements of the foundation. This method has the advantages of fast processing, simple process, wide application range, and can quickly form a hard shell layer to facilitate subsequent cofferdam construction. The existing in-situ solidification technology generally adopts the method of setting up a working platform in advance and placing the machinery on the working platform for construction. When the construction location needs to be changed, the working platform is dismantled and rebuilt at the new location. However, the repeated dismantling and construction of the construction platform is inevitably time-consuming, labor-intensive, inefficient, and the cost increases sharply. [Wang Hailin. A soft foundation solidification treatment equipment. Utility model patent. Authorization announcement number CN208136891U]; In addition, the existing in-situ solidification device has a large volume and load-bearing capacity, does not have the function of walking on the beach, and cannot quickly reach the designated location to carry out construction operations; the resistance of marine soft soil is large, and the mixing system required for solidification can only move vertically, resulting in a small horizontal reinforcement treatment range and poor vertical reinforcement effect. Therefore, it is impossible to carry out efficient reinforcement treatment for wide-area soft soil foundations. Summary of the invention

[0003] The purpose of the present invention is to provide a mobile wide-area soft soil solidification device, which can effectively solve the problems of slow speed, high energy consumption and low efficiency faced in the field of wide-area soft soil foundation reinforcement through mobile operation and uninterrupted spraying and stirring functions.

[0004] The present invention is achieved through the following technical solutions:

[0005] A mobile wide-area soft soil solidification device comprises a bracket, an opening is provided at the bottom of the bracket, an outer sleeve with closed ends is provided inside the bracket, an inner sleeve coaxial with the outer sleeve is provided inside the outer sleeve, and the inner sleeve is divided into chamber I and chamber II along the axial direction thereof, and hydraulic cylinders are provided in chamber I and chamber II, and a driving block is provided on the output end of each hydraulic cylinder, a vibration tube is provided in chamber I, the upper end of the vibration tube is open and the lower end is closed, the upper end of the vibration tube is connected to the lower surface of the driving block in chamber I through a spring, the lower end of the vibration tube is movably penetrated through the inner sleeve and the outer sleeve in turn and then extends downward, and at least one air vibrator is provided in chamber I; a telescopic tube is provided in chamber II, the upper end of the telescopic tube is connected to the lower surface of the driving block of chamber II, the lower end of the telescopic tube is movably penetrated through the inner sleeve and the outer sleeve in turn and then extends downward, and a stirrer is provided on the extended section of the telescopic tube.

[0006] In the prior art, preloading method and in-situ solidification method are used for solidification in marine soft soil areas. Compared with the preloading method, the in-situ solidification method has a short construction period, a wide range of applications, and can quickly form a hard shell layer to facilitate subsequent cofferdam construction. However, the above advantages are only limited to local marine soft soil. When solidifying marine soft soil areas in the entire region, the shortcomings of the in-situ solidification method are obvious, that is, the in-situ solidification device has a large volume and load-bearing capacity, does not have the function of walking on the tidal flat, cannot quickly reach the designated location to carry out construction operations, and needs to repeatedly build and disassemble the bearing platform when changing the working area, and cannot achieve continuous solidification operations. In response to the above defects, the applicant has designed a mobile wide-area soft soil foundation solidification device, which is based on a mobile bearing platform and uses vibration and rotation stirring to reduce the moving resistance of the solidification device. Grouting is performed by the agitator into the soft soil area, thereby realizing efficient reinforcement of the wide-area soft soil foundation. During operation, the bracket is fixed on a mobile bearing platform, the vibration tube and the telescopic tube are perpendicular to the initial working surface, and according to the curing operation route and the moving direction of the bearing platform, the vibration tube is located in front of the telescopic tube, the hydraulic cylinder in chamber I is started, and the air vibrator is started at the same time, so that the vibration tube penetrates into the soft soil in the vertical direction, and the air vibrator generates high-frequency vibration, thereby driving the vibration tube to vibrate and liquefy the marine soft soil, and then the hydraulic cylinder in chamber II is started, and the hydraulic cylinder drives the telescopic tube and the agitator to strongly stir the marine soft soil in the vertical direction. A separate grouting pipeline or a grouting component is set inside the agitator, and microbial slurry is injected into the soft soil while stirring, and microorganisms are used to induce calcium carbonate precipitation to solidify the marine soft soil, that is, the stirring, grouting and vibration processes are carried out simultaneously while the bearing platform moves slowly, ensuring that the slurry is evenly mixed in the soft soil. Among them, the output end of the hydraulic cylinder located in chamber II performs a linear reciprocating motion in the vertical direction, and then the agitator performs a stirring action in the vertical direction at the solidification point, ensuring that the bacterial liquid discharged from the grouting pipeline or the grouting component can penetrate into the soft soil layer and be evenly distributed, thereby improving the solidification efficiency of the soft soil; it is open above the vibration tube and connected to the bottom of the driving block through a spring, so that when the vibration tube vibrates at a high frequency, the spring can buffer and eliminate the stress generated by the vibration, so as to avoid the vibration from being transmitted to the inner sleeve and the outer sleeve, thereby reducing the probability of shaking of the bracket and the bearing platform; reducing the consumption of equipment due to the influence of the vibration rod, thereby extending the service life of the bracket and the bearing platform.

[0007] A plurality of bottom plates are arranged at intervals in the vibration tube, and a partition chamber is formed between two adjacent bottom plates, and the air vibrator is fixed in the partition chamber. Furthermore, due to the different depths of marine soft soil in a wide area, the diving depths of the vibration tube and the telescopic tube are also different. In order to improve the solidification effect of the soft soil layer at the solidification point, the applicant arranges a plurality of bottom plates in the vibration tube, so that a single air vibrator is placed in a separate partition chamber, and the mutual interference between the plurality of air vibrators is reduced under the premise of ensuring the vibration liquefaction effect of the soft soil layer at any depth.

[0008] A plurality of exhaust holes are provided on the outer wall of the vibration tube, and each exhaust hole is connected to the partition chamber, and a plurality of exhaust hoses connected to the exhaust holes are provided in the chamber I, and the exhaust end of the exhaust hose extends outward after passing through the outer sleeve. Furthermore, in view of the relatively difficult material supply during construction in a wide marine soft soil area, the applicant uses pneumatic vibration to vibrate and liquefy the soft soil, and the working principle of the air vibrator is to vibrate the piston by high-pressure gas acting on it to make it reciprocate up and down. After the high-pressure gas is input into the air vibrator, the gas will be discharged from the inner sleeve through the exhaust holes and the exhaust hose, avoiding the formation of pressurized conditions in the partition chamber and affecting the normal operation of the air vibrator.

[0009] A motor II and a sealing plate are arranged in the telescopic tube. The motor II is located above the sealing plate, and a connecting shaft is arranged on the output end of the motor II. The connecting shaft movably passes through the sealing plate and extends downward, and a planetary gear is arranged on the extended section of the connecting shaft; the agitator comprises a connecting tube and two cylindrical agitating heads. The connecting tube is placed horizontally and the middle part is connected to the extended section of the telescopic tube. The two agitating heads are rotatably arranged at both ends of the connecting tube. The two agitating heads are arranged obliquely so that their axes intersect, and the intersection of the axes of the two agitating heads is located on the mid-vertical line of the connecting tube. A central axis is arranged in each agitating head, and a bevel gear matching the planetary gear is arranged on the central axis. Furthermore, the agitator continuously and vigorously stirs the soft soil as the telescopic tube moves downward, thereby improving the mixing uniformity of the bacterial solution and the soft soil, and the working process of the agitator is as follows: Motor II is started, driving the connecting shaft and the planetary gear to rotate, and two cylindrical agitating heads are rotatably arranged at both ends of the connecting tube, and a bevel gear is fixed on the central axis provided inside the agitating head. The two bevel gears are meshed with the planetary gears, which can drive the agitating head to perform circular motion along its axis; wherein, the axes of the two cylindrical agitating heads are not placed horizontally, the axes of the two agitating heads intersect with the axis of the connecting tube, and the intersection point of the axes of the two agitating heads is located on the mid-vertical line of the connecting tube, that is, the two agitating heads are arranged obliquely, and when the agitator cuts into the soft soil, the forward resistance of the agitator can be reduced to a certain extent, and at the same time, when the agitator is moved out to above the soft soil, the amount of attachment on the agitator will be greatly reduced.

[0010] A plurality of protrusions are arranged at intervals on the outer circumferential wall of the stirring head along the circumference thereof. Furthermore, in order to improve the stirring intensity and stirring efficiency of the stirrer, protrusions are arranged on the outer circumferential walls of the two stirring heads, which can increase the contact area between the stirrer and the soft soil and reduce the resistance of the stirrer, thereby ensuring that the bacterial liquid can be fully mixed with the soft soil.

[0011] A ring-shaped temporary storage cavity is provided in each of the stirring heads, and a spray hole connected to the temporary storage cavity is provided between two adjacent protrusions. A grouting pipe is provided above the blocking plate, and the upper end of the grouting pipe is connected to the delivery hose after passing through chamber II. A ring hole is provided on one side wall of the temporary storage cavity near the connecting pipe, and a ring plate is rotatably arranged in the ring hole, and a rotating sealing ring is provided between the ring plate and the ring hole, and the lower end of the grouting pipe is connected to the temporary storage cavity after passing through the blocking plate and the ring plate in turn. Furthermore, a temporary storage cavity is provided in the stirring head for storing bacterial liquid to avoid insufficient bacterial liquid supply during the rotating stirring process of the stirring head; and, while the stirring head continues to rotate, the grouting pipe and the ring plate remain stationary, and the closed state of the temporary storage cavity is maintained by a rotating sealing ring between the ring hole and the ring plate, which can ensure that the bacterial liquid is continuously output from the spray hole.

[0012] The inner diameter of the injection hole decreases radially outwardly along the stirring head; a plurality of diversion holes are arranged on the outer wall of the stirring head along the axial direction of the injection hole, the plurality of diversion holes are connected with the injection hole and are evenly distributed along the circumference of the slurry outlet end of the injection hole. Furthermore, since the agitator is in the soft soil for a long time, part of the soft soil can easily enter the temporary storage cavity through the injection hole. In this regard, the applicant sets the inner diameter of the injection hole to decrease radially outward along the agitator head, thereby increasing the difficulty of the soft soil entering the temporary storage cavity through the injection hole. At the same time, the decreasing flow cross-section can increase the speed of the bacterial liquid spraying outward, indirectly increasing the radiation range of the bacterial liquid in the soft soil, and improving the solidification effect of the marine soft soil; wherein, a plurality of diversion holes are provided around the injection hole, the diversion holes are connected to the injection hole, and the axis of the diversion holes intersects with the axis of the injection hole, that is, when the bacterial liquid flows out along the injection hole, an annular jet flow will be formed around the outer end of the injection hole. On the premise of expanding the radiation range of the bacterial liquid, the protrusions adjacent to the diversion holes can also be flushed, thereby reducing the amount of attachments on the agitator.

[0013] A motor I is provided on the outer wall at the top of the outer sleeve, and two opposite U-shaped blocks are provided on the inner wall at the top of the outer sleeve. A disc is provided on the output end of the motor I, and the lower surface of the disc is connected to the top of the inner sleeve. The two blocks are symmetrically distributed along the axial direction of the disc, and the circumference of the disc is placed in the U-shaped area of ​​the two blocks. A through hole is opened at the bottom of the outer sleeve, and the lower end of the vibration tube and the lower end of the telescopic tube are both placed in the through hole; two limit blocks are symmetrically arranged on the outer circumferential wall along the axis of the disc, and a travel switch is provided on the side wall of each of the blocks, and the travel switch is electrically connected to the motor I. Furthermore, in the initial state, the disc is clamped in the U-shaped area of ​​the two blocks, and the limit block does not contact the travel switch. When the carrying platform changes its direction of travel, motor I starts, thereby driving the disc and the inner sleeve to rotate 180 degrees until the two limit blocks contact the travel switches on the side walls of the blocks respectively. The travel switch feeds back information and transmits the control command to motor I, and motor I stops running, that is, the positions of the vibration tube and the telescopic tube are swapped in the through hole, ensuring that the vibration tube is always in front of the agitator, liquefying the front marine soft soil in advance, and reducing the resistance in the running direction.

[0014] A support ring coaxial with the through hole is provided on the inner wall of the bottom of the outer sleeve, and the inner diameter of the support ring is larger than the inner diameter of the through hole. Furthermore, the weight of the inner sleeve and the components inside it is relatively large. In this regard, in order to increase the working stability of the components during the curing process, the applicant provides a support ring on the inner wall of the bottom of the outer sleeve, and the upper surface of the support ring contacts the bottom of the inner sleeve, which can provide stable support for it and avoid radial runout of the inner sleeve when the vibration tube vibrates and the agitator rotates.

[0015] A storage cabinet is provided on the support, and a partition is provided in the middle of the storage cabinet, and the partition divides the storage cabinet into two independent storage areas. A gas storage tank is provided in the upper storage area, and the exhaust end of the gas storage tank is connected to an air pump and an air outlet pipe in sequence. An air inlet pipe connected to the air outlet pipe is provided in the vibration pipe, and the air inlet pipe is connected to the air inlet of multiple air vibrators in sequence. A PLC control system and a liquid storage tank are provided in the storage area below, and the liquid outlet of the liquid storage tank is connected to a delivery hose. Furthermore, the storage cabinet provided on the support is used to place the gas storage tank, the liquid storage tank and the PLC control system, etc., which can provide gas or bacterial liquid supply to the air vibrator and the agitator respectively, and through the PLC control system, the motor I, the motor II and the two hydraulic cylinders can be automatically controlled to meet the solidification requirements of marine soft soil.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. The present invention can be installed on a crawler device or an amphibious platform, and uses an air vibrator to liquefy marine soft soil, reducing the resistance in the forward direction, so that the powerful agitator can move quickly in the soft soil. During the mixing process, the powerful agitator performs vertical reciprocating motion and horizontal motion at the same time, with high speed, high efficiency and wide area;

[0018] 2. The present invention adopts an air vibrator to vibrate the pneumatic vibrating tube through high-pressure gas, thereby reducing energy consumption and emissions. At the same time, a powerful agitator is used to stir while grouting, so that the grouting is uniform and the noise impact is small. Compared with the traditional in-situ curing equipment with poor uniformity, the grouting uniformity is higher, the bacterial liquid is evenly distributed, and microbial grouting can be performed to avoid environmental pollution;

[0019] 3. The axes of the two cylindrical mixing heads in the present invention are not placed horizontally, but intersect with the axis of the connecting pipe, and the intersection of the axes of the two mixing heads is located on the mid-vertical line of the connecting pipe, that is, the two mixing heads are arranged obliquely. When the agitator cuts into the soft soil, the forward resistance of the agitator can be reduced to a certain extent. At the same time, when the agitator is moved out to the top of the soft soil, the amount of attachment on the agitator will be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a grouting barrel;

[0023] Figure 3 is a cross-sectional view of a grouting barrel;

[0024] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0025] Figure 5 Schematic diagram of the disc structure.

[0026] Marks and corresponding parts names in the attached drawings:

[0027] 1- bracket, 2- outer sleeve, 3- motor I, 4- air storage tank, 5- air pump, 6- outlet pipe, 7- storage cabinet, 8- partition, 9- PLC control system, 10- liquid storage tank, 11- opening, 12- vibration tube, 13- telescopic tube, 14- agitator, 15- protrusion, 16- injection hole, 17- disc, 18- block, 19- limit block, 20- hydraulic cylinder, 21- driving block, 22- motor II, 23- grouting pipe, 24- blocking plate, 25- coupling shaft, 26- through hole, 27- support ring, 28- connecting pipe, 29- bottom plate, 30- air vibrator, 31- partition chamber, 32- air inlet pipe, 33- spring, 34- exhaust hole, 35- inner sleeve, 36- temporary storage cavity, 37- rotating shaft, 38- bevel gear, 39- travel switch, 40- diverter hole. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0029] Example 1

[0030] like Figures 1 to 5 As shown, this embodiment includes a bracket 1, an opening 11 is provided at the bottom of the bracket 1, an outer sleeve 2 with closed ends is provided in the bracket 1, an inner sleeve 35 coaxial with the outer sleeve 2 is provided in the outer sleeve 2, and the inner sleeve 35 is divided into chamber I and chamber II along the axial direction, and hydraulic cylinders 20 are provided in chamber I and chamber II, and a driving block 21 is provided on the output end of each hydraulic cylinder 20, and a vibration tube 12 is provided in chamber I, the upper end of the vibration tube 12 is open and the lower end is closed, and the vibration tube The upper end of 12 is connected to the lower surface of the driving block 21 in chamber I through a spring 33, and the lower end of the vibration tube 12 moves through the inner sleeve 35 and the outer sleeve 2 in sequence and then extends downward, and at least one air vibrator 30 is provided in chamber I; a telescopic tube 13 is provided in chamber II, and the upper end of the telescopic tube 13 is connected to the lower surface of the driving block 21 of chamber II, and the lower end of the telescopic tube 13 moves through the inner sleeve 35 and the outer sleeve 2 in sequence and then extends downward, and a stirrer 14 is provided on the extended section of the telescopic tube 13.

[0031] During operation, the bracket 1 is fixed on a movable bearing platform, the vibration tube 12 and the telescopic tube 13 are perpendicular to the initial working surface, and according to the curing operation route and the moving direction of the bearing platform, the vibration tube 12 is located in front of the telescopic tube 13, the hydraulic cylinder 20 in the chamber I is started, and the air vibrator 30 is started at the same time, so that the vibration tube 12 penetrates into the soft soil in the vertical direction, and the air vibrator 30 generates high-frequency vibration, thereby driving the vibration tube 12 to vibrate and liquefy the marine soft soil, and then the hydraulic cylinder 20 in the chamber II is started, and the hydraulic cylinder 20 drives the telescopic tube 13 and the agitator 14 to strongly stir the marine soft soil in the vertical direction. A separate grouting pipe 23 or a grouting assembly is set inside the agitator 14, and microbial slurry is injected into the soft soil while stirring, and microorganisms are used to induce calcium carbonate precipitation to solidify the marine soft soil, that is, while the bearing platform moves slowly, stirring, grouting and vibration processes are carried out simultaneously to ensure that the slurry is evenly mixed in the soft soil. Among them, the output end of the hydraulic cylinder 20 located in chamber II performs linear reciprocating motion, and then the agitator 14 performs linear reciprocating stirring action at the solidification point, ensuring that the bacterial liquid discharged from the grouting pipe 23 or the grouting component can penetrate into the soft soil layer and be evenly distributed, thereby improving the solidification efficiency of the soft soil; it is open above the vibration tube 12 and connected to the bottom of the driving block 21 through the spring 33, so that when the vibration tube 12 vibrates at high frequency, the spring 33 can buffer and eliminate the stress generated by the vibration, so as to avoid the vibration from being transmitted to the inner sleeve 35 and the outer sleeve 2, thereby reducing the probability of shaking of the bracket 1 and the bearing platform.

[0032] The operating principles of the vibration tube 12 and the stirrer 14 are as follows:

[0033] In this embodiment, a plurality of bottom plates 29 are arranged at intervals in the vibration tube 12, and a partition chamber 31 is formed between two adjacent bottom plates 29, and the air vibrator 30 is fixed in the partition chamber 31; a plurality of exhaust holes 34 are opened on the outer wall of the vibration tube 12, and each exhaust hole 34 is connected to the partition chamber 31, and a plurality of exhaust hoses connected to the exhaust holes 34 are arranged in the chamber I, and the outlet end of the exhaust hose extends outward after passing through the outer sleeve 2. Due to the different depths of marine soft soil in a wide area, the diving depths of the vibration tube 12 and the telescopic tube 13 are also different. In order to improve the solidification effect of the soft soil layer at the solidification point, the present technical solution is provided with a plurality of bottom plates 29 in the vibration tube 12, so that a single air vibrator is placed in a separate partition chamber 31, and the mutual interference between the multiple air vibrators is reduced under the premise of ensuring the vibration liquefaction effect of the soft soil layer at any depth. This embodiment uses pneumatic vibration to vibrate and liquefy the soft soil, and the working principle of the air vibrator is to vibrate the piston by high-pressure gas to make it reciprocate up and down. After the high-pressure gas is input into the air vibrator, the gas will be discharged from the inner sleeve 35 through the exhaust hole 34 and the exhaust hose, so as to avoid the formation of pressure conditions in the partition chamber 31 and affect the normal operation of the air vibrator. It should be further pointed out that according to the diving depth of the vibration tube 12, the exhaust hose will not enter the soft soil with the lower section of the vibration tube 12, so as to ensure the normal supply of the required gas volume of the air vibrator 30.

[0034] In this embodiment, a motor II 22 and a blocking plate 24 are provided in the telescopic tube 13. The motor II 22 is located above the blocking plate 24, and a connecting shaft 25 is provided on the output end of the motor II 22. The connecting shaft 25 movably penetrates the blocking plate 24 and then extends downward, and a planetary gear is provided on the extended section of the connecting shaft 25.

[0035] The stirrer 14 includes a connecting tube and two cylindrical stirring heads. The connecting tube 28 is placed horizontally and the middle part is connected to the extension section of the telescopic tube 13. The two stirring heads are rotatably arranged at both ends of the connecting tube 28. The two stirring heads are inclined so that their axes intersect, and the intersection of the axes of the two stirring heads is located on the mid-vertical line of the connecting tube. A central axis 37 is provided in each stirring head, and a bevel gear 38 that cooperates with the planetary gear is provided on the central axis 37. The stirrer 14 continuously stirs the soft soil vigorously as the telescopic tube 13 moves downward, thereby improving the mixing uniformity of the bacterial solution and the soft soil, and the working process of the stirrer 14 is as follows: the motor II 22 is started, thereby driving the connecting shaft 25 and the planetary gear to rotate, and two cylindrical stirring heads are rotatably arranged at both ends of the connecting tube 28, and a bevel gear 38 is fixed on the central axis 37 provided inside the stirring head. The two bevel gears 38 are meshed with the planetary gears, which can drive the stirring head to perform circular motion along its axis; wherein, the axes of the two cylindrical stirring heads are not placed horizontally, the axes of the two stirring heads intersect with the axis of the connecting tube, and the intersection point of the axes of the two stirring heads is located on the mid-vertical line of the connecting tube, that is, the two stirring heads are arranged obliquely, when the stirrer 14 cuts into the soft soil, the forward resistance of the stirrer 14 can be reduced to a certain extent, and when the stirrer 14 is moved out to the top of the soft soil, the amount of attachment on the stirrer 14 will be greatly reduced.

[0036] Preferably, in order to improve the stirring intensity and stirring efficiency of the stirrer 14, protrusions 15 are provided on the outer circumferential walls of the two stirring heads, which can increase the contact area between the stirrer 14 and the soft soil while reducing the resistance encountered by the stirrer 14, ensuring that the bacterial solution can be fully mixed with the soft soil.

[0037] Example 2

[0038] like Figures 1 to 5 As shown, in this embodiment, an annular temporary storage cavity 36 is provided in each of the mixing heads, and an injection hole 16 connected to the temporary storage cavity 36 is provided between two adjacent protrusions 15. A grouting pipe 23 is provided above the blocking plate 24. The upper end of the grouting pipe 23 passes through chamber II and is connected to the conveying hose. An annular hole is opened on one side wall of the temporary storage cavity 36 near the connecting pipe. The annular plate is rotatably arranged in the annular hole, and a rotating sealing ring is provided between the annular plate and the annular hole. The lower end of the grouting pipe 23 passes through the blocking plate 24 and the annular plate in sequence and is connected to the temporary storage cavity 36; the inner diameter of the injection hole 16 decreases radially outwardly along the mixing head; a plurality of diversion holes 40 are provided on the outer wall of the mixing head along the axial direction of the injection hole 16, and the plurality of diversion holes 40 are connected to the injection hole 16 and are evenly distributed along the circumference of the slurry outlet end of the injection hole 16.

[0039] During grouting, the stirring head continuously rotates while the grouting pipe 23 and the annular plate remain stationary, and the annular hole and the annular plate are connected by a rotating sealing ring to maintain the closed state of the temporary storage cavity 36, which can ensure that the bacterial liquid is continuously output from the injection hole 16; because the stirrer 14 is in the soft soil for a long time, part of the soft soil is easy to enter the temporary storage cavity 36 through the injection hole 16. In this regard, in this embodiment, the inner diameter of the injection hole 16 is set to decrease radially outward along the stirring head, increasing the difficulty of the soft soil entering the temporary storage cavity 36 through the injection hole 16. At the same time, the decreasing flow cross-section can increase the speed of the bacterial liquid spraying outward, indirectly increasing the radiation range of the bacterial liquid in the soft soil, and improving the solidification effect of the marine soft soil.

[0040] A plurality of diverter holes 40 are provided around the injection hole 16, and the diverter holes 40 are connected to the injection hole 16, and the axis of the diverter hole 40 intersects with the axis of the injection hole 16, that is, when the bacterial liquid flows out along the injection hole 16, an annular jet flow is formed around the outer end of the injection hole 16, and on the premise of expanding the radiation range of the bacterial liquid, the protrusion 15 adjacent to the diverter hole 40 can also be flushed, thereby reducing the amount of attachment on the agitator 14.

[0041] It should be further pointed out that in order to ensure that the grouting pipe 23 is connected to the temporary storage cavity 36 and does not interfere with the rotation of the temporary storage cavity 36, a relative displacement needs to be generated between the annular plate and the temporary storage cavity 36, that is, the annular plate remains stationary and the temporary storage cavity 36 rotates. Since the temporary storage cavity 36 is used as a storage space for pressurized slurry, the thickness of its outer wall is relatively large, and the thickness of the corresponding annular plate corresponds to the thickness of the wall of the temporary storage cavity 36. Rotating sealing rings are fixed on both inner circumferential walls of the annular hole to ensure that the annular plate and the temporary storage cavity 36 are connected. The connection between the annular holes is airtight to prevent the slurry in the temporary storage cavity 36 from overflowing; the rotating sealing ring is composed of a sliding ring filled with polytetrafluoroethylene and a rubber O-ring provided with a natural gas, and the rubber O-ring is fixed on the inner circumferential wall of the sliding ring. When in use, annular grooves matching the sliding ring are opened on the inner circumferential walls on both sides of the annular hole, and the two rubber O-rings are in contact with the inner circumferential wall and the outer circumferential wall of the annular plate respectively. When the temporary storage cavity 36 rotates, the rotating sealing ring can ensure that there is no slurry overflowing from the annular plate.

[0042] Example 3

[0043] like Figures 1 to 5As shown, in this embodiment, a motor I3 is provided on the outer wall at the top of the outer sleeve 2, two opposite U-shaped blocks 18 are provided on the inner wall at the top of the outer sleeve 2, a disc 17 is provided on the output end of the motor I3, the lower surface of the disc 17 is connected to the top of the inner sleeve 35, the two blocks 18 are symmetrically distributed along the axial direction of the disc 17, and the circumference of the disc 17 is placed in the U-shaped area of ​​the two blocks 18, a through hole 26 is opened at the bottom of the outer sleeve 2, and the lower end of the vibration tube 12 and the lower end of the telescopic tube 13 are both placed in the through hole 26; two limit blocks 19 are symmetrically arranged on the outer circumferential wall along the axis of the disc 17, and a travel switch 39 is provided on the side wall of each of the blocks 18, and the travel switch 39 is electrically connected to the motor I3; a support ring 27 coaxial with the through hole 26 is provided on the inner wall at the bottom of the outer sleeve 2, and the inner diameter of the support ring 27 is larger than the inner diameter of the through hole 26.

[0044] In the initial state, the disc 17 is clamped in the U-shaped area of ​​the two clamping blocks 18, and the limit block 19 does not contact the travel switch 39. When the carrying platform changes its direction of travel, the motor I3 starts, thereby driving the disc 17 and the inner sleeve 35 to rotate 180 degrees until the two limit blocks 19 respectively contact the travel switches 39 on the side walls of the clamping blocks 18. The travel switch 39 feeds back information and transmits the control command to the motor I3, and the motor I3 stops running, that is, the positions of the vibration tube 12 and the telescopic tube 13 are in the through hole 26. The vibration tube 12 is replaced to ensure that it is always in front of the agitator 14, liquefy the marine soft soil in front in advance, and reduce the resistance in the running direction; the weight of the inner sleeve 35 and the components inside it is relatively large. In this regard, in order to increase the working stability of each component during the solidification process, this embodiment provides a support ring 27 on the inner wall of the bottom of the outer sleeve 2, and the upper surface of the support ring 27 contacts with the bottom of the inner sleeve 35, which can provide stable support for it, thereby avoiding radial runout of the inner sleeve 35 when the vibration tube 12 vibrates and the agitator 14 rotates.

[0045] In this embodiment, during the solidification process of the marine soft soil, the supporting platform continues to move in a straight line at a low speed. After the supporting platform switches the moving direction, the soft soil area passed by the agitator 14 partially overlaps with the area that has completed the solidification process before, that is, the overlapping soft soil area will be subjected to secondary vibration, stirring and grouting processes, thereby improving the mixing uniformity between the slurry and the liquefied soft soil, thereby achieving the purpose of efficient solidification of the marine soft soil.

[0046] As a preference, in this embodiment, a storage cabinet 7 is provided on the support 1, and a partition 8 is provided in the middle of the storage cabinet 7, and the partition 8 divides the storage cabinet 7 into two independent storage areas. A gas storage tank 4 is provided in the upper storage area, and the exhaust end of the gas storage tank 4 is connected to an air pump 5 and an air outlet pipe 6 in sequence. An air inlet pipe 32 connected to the air outlet pipe 6 is provided in the vibration pipe 12, and the air inlet pipe 32 is connected to the air inlet of multiple air vibrators 30 in sequence. A PLC control system 9 and a liquid storage tank 10 are provided in the storage area below, and the liquid outlet of the liquid storage tank 10 is connected to a delivery hose. The storage cabinet 7 provided on the support 1 is used to place the gas storage tank 4, the liquid storage tank 10 and the PLC control system 9, etc., and can provide gas or bacterial liquid supply to the air vibrator 30 and the agitator 14 respectively, and through the PLC control system 9, the motor I3, the motor II22 and the two hydraulic cylinders 20 can be automatically controlled to meet the requirements of marine soft soil solidification construction.

[0047] The liquid storage tank 10 can store not only bacterial liquid but also cement slurry, chemical slurry, etc. Different slurries are used according to the actual solidification requirements of marine soft soil, thereby increasing the flexibility of the solidification device.

[0048] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mobile wide-area soft soil solidification device, comprising a bracket (1), wherein an opening (11) is provided at the bottom of the bracket (1), characterized in that: An outer sleeve (2) with closed ends is provided in the support (1), and an inner sleeve (35) coaxial with the outer sleeve (2) is provided in the outer sleeve (2). The inner sleeve (35) is divided into chamber I and chamber II along the axial direction, and hydraulic cylinders (20) are provided in chamber I and chamber II. A driving block (21) is provided at the output end of each hydraulic cylinder (20). A vibration tube (12) is provided in chamber I, and the upper end of the vibration tube (12) is open and the lower end is closed. The upper end of the vibration tube (12) is connected to chamber I through a spring (33). The lower end of the vibration tube (12) is movably connected to the lower surface of the driving block (21) in the chamber II, the lower end of the vibration tube (12) is movably penetrated through the inner sleeve (35) and the outer sleeve (2) in sequence and then extends downward, and at least one air vibrator (30) is provided in the chamber I; a telescopic tube (13) is provided in the chamber II, the upper end of the telescopic tube (13) is connected to the lower surface of the driving block (21) in the chamber II, the lower end of the telescopic tube (13) is movably penetrated through the inner sleeve (35) and the outer sleeve (2) in sequence and then extends downward, and a stirrer (14) is provided on the extension section of the telescopic tube (13); A motor II (22) and a blocking plate (24) are arranged in the telescopic tube (13). The motor II (22) is located above the blocking plate (24). A connecting shaft (25) is arranged on the output end of the motor II (22). The connecting shaft (25) movably penetrates the blocking plate (24) and then extends downward. A planetary gear is arranged on the extension section of the connecting shaft (25). The stirrer (14) comprises a connecting tube (28) and two cylindrical stirring heads. The connecting tube is placed horizontally and the middle part is connected to the extension section of the telescopic tube (13). The two stirring heads are rotatably arranged at both ends of the connecting tube. The two stirring heads are arranged obliquely so that the axes thereof intersect. The intersection point of the axes of the two stirring heads is located on the mid-vertical line of the connecting tube. A A central shaft (37) is provided, and a bevel gear (38) matched with the planetary gear is provided on the central shaft (37); a ring-shaped temporary storage cavity (36) is provided in each of the stirring heads, and a spray hole (16) connected to the temporary storage cavity (36) is provided between two adjacent protrusions (15); a grouting pipe (23) is provided above the blocking plate (24); the upper end of the grouting pipe (23) passes through the chamber II and is connected to the conveying hose; an annular hole is opened on a side wall of the temporary storage cavity (36) close to the connecting pipe; the annular plate is rotatably arranged in the annular hole, and a rotating sealing ring is provided between the annular plate and the annular hole; the lower end of the grouting pipe (23) passes through the blocking plate (24) and the annular plate in sequence and is connected to the temporary storage cavity (36).

2. The mobile wide-area soft soil solidification device according to claim 1, characterized in that: A plurality of bottom plates (29) are arranged at intervals in the vibration tube (12), a partition chamber (31) is formed between two adjacent bottom plates (29), and the air vibrator (30) is fixed in the partition chamber (31).

3. The mobile wide-area soft soil solidification device according to claim 2, characterized in that: A plurality of exhaust holes (34) are provided on the outer wall of the vibration tube (12), and each exhaust hole (34) is communicated with the partition chamber (31) respectively. A plurality of exhaust hoses connected to the exhaust holes (34) are provided in the chamber I, and the exhaust ends of the exhaust hoses extend outward after passing through the outer sleeve (2).

4. The mobile wide-area soft soil solidification device according to claim 1, characterized in that: A plurality of protrusions (15) are arranged at intervals on the outer circumferential wall of the stirring head along the circumference thereof.

5. The mobile wide-area soft soil solidification device according to claim 1, characterized in that: The inner diameter of the injection hole (16) decreases radially outwardly of the stirring head; a plurality of flow diversion holes (40) are provided on the outer wall of the stirring head along the axial direction of the injection hole (16); the plurality of flow diversion holes (40) are connected to the injection hole (16) and are evenly distributed along the circumference of the slurry outlet end of the injection hole (16).

6. A mobile wide-area soft soil solidification device according to any one of claims 3 to 5, characterized in that: A motor I (3) is provided on the outer wall at the top of the outer sleeve (2), and two opposed U-shaped blocks (18) are provided on the inner wall at the top of the outer sleeve (2). A disc (17) is provided on the output end of the motor I (3), and the lower surface of the disc (17) is connected to the top of the inner sleeve (35). The two blocks (18) are symmetrically distributed along the axial direction of the disc (17), and the circumference of the disc (17) is placed in the U-shaped area of ​​the two blocks (18). A through hole (26) is opened at the bottom of the outer sleeve (2), and the lower end of the vibration tube (12) and the lower end of the telescopic tube (13) are both placed in the through hole (26); two limit blocks (19) are symmetrically arranged on the outer circumferential wall along the axis of the disc (17), and a travel switch (39) is provided on the side wall of each of the blocks (18), and the travel switch (39) is electrically connected to the motor I (3).

7. The mobile wide-area soft soil solidification device according to claim 6, characterized in that: A support ring (27) coaxial with the through hole (26) is provided on the inner wall of the bottom of the outer sleeve (2), and the inner diameter of the support ring (27) is larger than the inner diameter of the through hole (26).

8. The mobile wide-area soft soil solidification device according to claim 1, characterized in that: A storage cabinet (7) is provided on the support (1), and a partition (8) is provided in the middle of the storage cabinet (7). The partition (8) divides the storage cabinet (7) into two independent storage areas. An air storage tank (4) is provided in the upper storage area. The exhaust end of the air storage tank (4) is connected to an air pump (5) and an air outlet pipe (6) in sequence. An air inlet pipe (32) connected to the air outlet pipe (6) is provided in the vibration pipe (12). The air inlet pipe (32) is connected to the air inlets of a plurality of air vibrators (30) in sequence. A PLC control system (9) and a liquid storage tank (10) are provided in the lower storage area. The liquid outlet of the liquid storage tank (10) is connected to a delivery hose.

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