A pumping and injection combined bladder-type pressurized soil reinforcement device

Abstract

The present invention discloses a combined pumping and injection type bladder-type pressurized soil reinforcement device, which belongs to the field of foundation pit construction; the device comprises a cone tip, a pipe column, a blocking mechanism, an annular pipe, a suction hole, a primary air bag, an outer sleeve, a grouting branch pipe, a grouting pipe, and a secondary air bag; the cone tip is located at the lower end of the pipe column; a bladder-type grouting body is provided on the axial outer wall of the pipe column; the bladder-type grouting bodies are alternately distributed with the suction holes; a blocking mechanism matching the suction holes is provided in the pipe column; a grouting pipe is provided in the pipe column, and the lower end of the grouting pipe is connected to the annular pipe; the axis of the annular pipe coincides with the axis of the outer sleeve; the grouting branch pipe is arranged on the outer side of the outer sleeve; the primary air bag and the secondary air bag are arranged on the inner side of the pipe column. The present invention adopts a method of deep digging pile holes, quickly lowering the pipe column for grouting or combining drainage and lowering, and uses multiple groups of bladder-type grouting bodies to specifically treat soil layers in different areas, thereby solving the problem of low reinforcement efficiency caused by a single grouting reinforcement method.

Description

Technical Field

[0001] The invention belongs to the field of foundation pit construction, and in particular relates to a pumping and injection combined bladder-type pressurized soil reinforcement device. Background Art

[0002] A construction foundation pit is a pit excavated at the designed foundation location according to the base elevation and dimensions. Due to differences in the superstructure and soil structure of the construction pit, the planar dimensions, depth, and slope of the pit vary. During the excavation process, to ensure the safety of the main structure and the surrounding environment, construction workers are required to promptly reinforce the pit sidewalls according to a pre-established construction plan.

[0003] Jet grouting is a common construction method for foundation pit reinforcement. The slurry is given kinetic energy by a high-pressure pump in advance and then ejected from the grouting pipe nozzle at high speed, forming a high-velocity liquid flow that directly destroys the surrounding soil. During the liquid flow injection process, the drill rod rotates and gradually rises upward, so that the slurry and soil particles are fully mixed, forming a columnar consolidation body of a certain diameter, thereby reinforcing the foundation pit.

[0004] For building foundation pits with a large vertical depth, the foundation pit needs to be excavated in stages. That is, after excavating to a certain depth, the excavated foundation pit needs to be supported in a timely manner. After the support of the current depth is completed, the next level of foundation pit will be excavated downwards to ensure the safety of the next level of foundation pit excavation.

[0005] However, for foundation pit projects with large vertical depths and complex soil conditions, such as those with interlaced rock and soft soil layers and high water content, when using rotary jet piles to reinforce the soil, in order to achieve efficient reinforcement of a large area of ​​soil, the pumping pressure needs to be greatly increased, resulting in increased energy consumption and low reinforcement efficiency. Summary of the Invention

[0006] In order to solve the above problems, the present invention aims to provide a combined pumping and injection type bladder pressurized soil reinforcement device, which includes a cone tip, a pipe string, a blocking mechanism, a ring pipe, a suction hole, a primary air bag, an outer sleeve, a grouting branch pipe, a grouting pipe, and a secondary air bag;

[0007] The cone tip is located at the lower end of the pipe string;

[0008] The pipe string is provided with a bag-type grouting body on its outer wall in the axial direction;

[0009] The sac-type grouting bodies and the suction holes are alternately distributed;

[0010] A blocking mechanism matching the suction hole is provided in the pipe column, and the blocking mechanism blocks or opens the suction channel in the suction hole through a linkage mechanism;

[0011] A grouting pipe is provided in the pipe column, and the lower end of the grouting pipe is connected to the ring pipe;

[0012] The axis of the annular tube coincides with the axis of the outer sleeve;

[0013] The grouting branch pipe is arranged outside the outer casing;

[0014] The primary air bag is arranged inside the pipe string and outside the grouting branch pipe;

[0015] The secondary airbag is arranged inside the column and located at the lower end of the suction hole.

[0016] Furthermore, the bladder grouting body includes a first control valve, a telescopic pipe, a second control valve, a connecting pipe, an arc-shaped groove, a bladder body, and a cross opening;

[0017] The capsule grouting body includes two hemispherical capsules;

[0018] The pipe column is provided with two arc-shaped grooves on the outer wall in the circumferential direction;

[0019] The capsule is initially folded and fixed in the arc-shaped groove;

[0020] The second control valve and the first control valve are control valve components;

[0021] A telescopic tube is provided in the middle of the sac body, one end of which is connected to the connecting pipe through a second control valve;

[0022] The other end of the telescopic tube passes through the sac and is communicated with the outside of the sac, and the inside of the sac is communicated with the connecting pipe through two first control valves; a cross opening is opened on the outer wall of each sac.

[0023] Furthermore, the connecting pipe connects two adjacent ring pipes, and each connecting pipe is connected to the corresponding bladder grouting body through the control valve component.

[0024] Furthermore, the capsules are staggeredly distributed along the axis of the tube column.

[0025] Furthermore, the blocking mechanism includes a connecting plate and a blocking plate;

[0026] The blocking mechanism is provided with a connecting plate along the circumference of the outer wall of the outer sleeve;

[0027] The outer end of the connecting plate is connected to the blocking plate;

[0028] Furthermore, the suction channel includes suction units spaced apart along the circumference of the pipe string;

[0029] The suction unit includes suction holes arranged along the radial direction of the pipe column.

[0030] Furthermore, the outer wall of the blocking plate matches the inner wall of the pipe string and can completely block a suction unit;

[0031] The inner wall of the outer sleeve is provided with a slide groove; the slide groove is cross-shaped;

[0032] A movable groove is formed on the inner wall of the outer sleeve, and the movable groove is connected to the slide groove;

[0033] The groove depth of the movable groove along the radial direction of the outer sleeve is greater than the groove depth of the sliding groove.

[0034] A linkage unit is provided in the outer sleeve, and the linkage unit can be switched between the movable groove and the sliding groove, and by adjusting the movement of the linkage unit, different blocking mechanisms can be used to control the opening and closing of the corresponding suction units;

[0035] Two adjacent outer sleeves are rotationally connected via a movable seal.

[0036] Furthermore, the linkage mechanism includes a primary linkage rod, a secondary linkage rod, and a tertiary linkage rod;

[0037] A secondary connecting rod is provided in the axial direction of the primary linkage rod;

[0038] A third-stage connecting rod is provided axially through the second-stage connecting rod;

[0039] Slide blocks that cooperate with the slide grooves are respectively provided on the outer walls of the primary linkage rod, the secondary linkage rod and the tertiary linkage rod;

[0040] The secondary linkage rod is fixed on the lower extension section of the secondary connecting rod, and the tertiary linkage rod is fixed on the lower extension section of the tertiary connecting rod;

[0041] The upper extension section of the secondary connecting rod is sleeved with a primary square column and a primary connecting plate connected in sequence from top to bottom;

[0042] The end of the upper extension section of the secondary connecting rod is provided with a secondary square column and a secondary connecting plate connected in sequence from top to bottom;

[0043] The end of the upper extension section of the three-stage connecting rod is provided with a three-stage square column and a three-stage connecting plate connected in sequence from top to bottom;

[0044] An adjusting mechanism is provided at the top of the pipe column, and the adjusting mechanism can respectively realize the circumferential rotation and vertical movement of the primary linkage rod, the secondary linkage rod and the tertiary linkage rod.

[0045] Furthermore, the adjustment mechanism includes a connecting column, a limiting plate, and a primary downward pressure pipe, a secondary downward pressure pipe, and a tertiary downward pressure pipe sequentially sleeved from the outside to the inside;

[0046] The primary down-pressure tube, the secondary down-pressure tube and the tertiary down-pressure tube are all square tubes and match the shapes of the primary steering column, the secondary square column and the tertiary square column respectively;

[0047] The lower end of the connecting column is rotatably connected to the middle part of the limiting plate and is used to provide vertical support for the limiting plate;

[0048] Two limiting units are provided on the upper surface of the limiting plate, and the limiting units include a primary limiting hole, a secondary limiting hole, and a tertiary limiting hole which are arranged in sequence from the outside to the inside along the radial direction of the limiting plate and are in an arc shape;

[0049] Bottom plates are slidably provided on the primary limiting holes, the secondary limiting holes, and the tertiary limiting holes;

[0050] An oil cylinder is vertically provided on the bottom plate;

[0051] The upper end surfaces of the primary downward pressure tube, the secondary downward pressure tube and the tertiary downward pressure tube are respectively provided with a primary guide rod, a secondary guide rod and a tertiary guide rod;

[0052] The primary guide rod extends vertically upward to movably penetrate the primary limiting hole, is located behind the bottom plate on the primary limiting hole, and is connected to the corresponding oil cylinder output end;

[0053] The secondary guide rod extends vertically upward to movably pass through the secondary limiting hole, and is connected to the bottom plate located on the secondary limiting hole, and is connected to the corresponding oil cylinder output end;

[0054] The three-level guide extends vertically upward to the bottom plate that is movable through the three-level limiting hole and located on the three-level limiting hole, and is connected to the corresponding oil cylinder output end;

[0055] A driving gear matching with the primary down-pressure tube is sleeved on the outer wall of the primary down-pressure tube.

[0056] Furthermore, the circles corresponding to the arcs where the primary limiting holes, the secondary limiting holes, and the tertiary limiting holes are located are concentric with the limiting plate.

[0057] Compared with the existing technology, the advantages and effects of this application are as follows:

[0058] 1. The present invention adopts the design of a grouting mechanism, and a bag-type grouting body is arranged in the grouting mechanism. When the soil layer is a conventional soil sample, the volume of the bag-type grouting body will not change and the slurry can be directly sprayed outward for solidification; when the soil layer is soft soil with a high water content or a silt soil sample or rock layer, the bag-type grouting body can expand the volume and perform pressurization treatment inside it, so that the radiation area of ​​the slurry is increased; this design can adaptively treat soil layers in different areas, and can quickly solve the problems of low reinforcement efficiency and extended reinforcement period caused by a single grouting reinforcement method.

[0059] 2. The present invention adopts a design in which the bag-type grouting body and the suction hole are alternately distributed, so that the pressure of the slurry sprayed outward will be increased to a certain extent. On the basis of increasing the spraying path, the discharge pressure of the slurry is improved, which can effectively increase the slurry flow rate per unit time and reduce the efficiency of the slurry solidification affected by the residual water after drainage in the soft soil layer.

[0060] 3. The present invention arranges staggered distribution of bladders in the axial direction of the pipe column, which can ensure that the bladders provide more uniform support to the inner wall of the pile hole during the expansion process. Especially when encountering soft soil layers, the multiple groups of bladders in the device can exert action and reaction forces in multiple directions on the outer wall of the pipe column when they expand.

[0061] 4. The present invention utilizes a linkage mechanism, an adjustment mechanism, and a sealing mechanism. The sealing mechanism primarily controls the opening and closing of each set of suction channels, selectively draining the foundation pit soil. Through the movement and adjustment of the linkage unit, different sealing mechanisms can control the opening and closing of corresponding suction units. The adjustment mechanism enables circumferential rotation and vertical movement of the linkage mechanism. This multi-mechanism connection design enhances the interoperability of the various components of the device, making the device more flexible during the reinforcement process.

[0062] 5. The present invention designs the slide groove into a cross shape, which can increase the contact area between the linkage rod and the outer sleeve and improve the movement stability of the device.

[0063] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiment of the present application in conjunction with the accompanying drawings.

[0064] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without inventive work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0066] in:

[0067] Figure 1A longitudinal sectional view of the present invention;

[0068] Figure 2 It is a structural schematic diagram of the present invention;

[0069] Figure 3 It is a structural diagram of the grouting mechanism;

[0070] Figure 4 Schematic diagram of the structure of the blocking mechanism;

[0071] Figure 5 It is a longitudinal cross-sectional view of the blocking mechanism;

[0072] Figure 6 It is a structural diagram of the linkage mechanism;

[0073] Figure 7 Schematic diagram of the structure of the regulating mechanism;

[0074] Figure 8 A top view of the adjustment mechanism.

[0075] The reference numerals represent: 1-cone tip, 2-pipe column, 3-sealing mechanism, 301-connecting plate, 302-sealing plate, 4-annular pipe, 5-suction hole, 6-primary air bag, 7-outer sleeve, 8-grouting branch pipe, 9-grouting pipe, 10-secondary air bag, 11-first control valve, 12-telescopic pipe, 13-second control valve, 14-connecting pipe, 15-arc groove, 16-bladder body, 17-cross opening, 18-primary linkage rod, 19-slider, 20-movable groove, 21-slide, 22-secondary linkage rod, 23-tertiary linkage rod, 24-primary linkage Connecting plate, 25-primary square column, 26-secondary connecting rod, 27-secondary connecting plate, 28-secondary square column, 29-tertiary connecting rod, 30-tertiary connecting plate, 31-tertiary square column, 32-tertiary guide rod, 33-secondary guide rod, 34-primary guide rod, 35-connecting column, 36-base plate, 37-limiting plate, 38-tertiary downward pressure tube, 39-secondary downward pressure tube, 40-primary downward pressure tube, 41-driving gear, 42-connecting piece, 43-oil cylinder, 44-connecting fastener, 45-primary limiting hole, 46-secondary limiting hole, 47-tertiary limiting hole. Specific embodiments

[0076] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures has been omitted in the embodiments.

[0077] It should be understood that references throughout this specification to "one embodiment" or "this embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearance of "one embodiment" or "this embodiment" throughout this specification does not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0078] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0079] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after are in an "or" relationship.

[0080] The term "at least one" in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0081] It should also be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprises," or any other variations thereof are intended to cover non-exclusive inclusion.

[0082] Example 1

[0083] This embodiment discloses a pumping and injection combined bladder type pressurized soil reinforcement device, please refer to Figure 1 As shown, the device includes a cone tip 1, a pipe string 2, a plugging mechanism 3, a ring pipe 4, a suction hole 5, a primary air bag 6, an outer sleeve 7, a grouting branch pipe 8, a grouting pipe 9, and a secondary air bag 10;

[0084] The cone tip 1 is located at the lower end of the pipe string 2; a bag-type grouting body is provided on the outer wall of the pipe string 2 in the axial direction;

[0085] The sac-type grouting bodies and the suction holes 5 are alternately distributed;

[0086] The pipe column 2 is provided with a blocking mechanism 3 matching the suction hole 5;

[0087] A grouting pipe 9 is provided in the pipe column 2, and the lower end of the grouting pipe 9 is connected to the ring pipe 4; the axis of the ring pipe 4 coincides with the axis of the outer sleeve 7;

[0088] The grouting branch pipe 8 is arranged outside the outer casing 7;

[0089] Please refer to Figure 2 As shown, the primary airbag 6 is arranged inside the pipe string 2 and outside the grouting branch pipe 8; the secondary airbag 10 is arranged inside the pipe string 2 and at the lower end of the suction hole 5.

[0090] The pipe string 2 has multiple groups of suction channels on its outer wall in the axial direction, and multiple groups of sac grouting bodies are provided on its outer wall along the axial direction of the pipe string 2, and the multiple groups of sac grouting bodies are alternately distributed with the multiple groups of suction holes 5;

[0091] A plurality of blocking mechanisms 3 matching the suction holes 5 are provided in the pipe string 2, and the plurality of blocking mechanisms 3 are linked to each other to block or open the suction channel.

[0092] A grouting pipe 9 is provided in the pipe column 2 , and a plurality of annular pipes 4 are connected to the lower end of the grouting pipe 9 , and two adjacent annular pipes 4 are connected via a connecting pipe 14 , and each connecting pipe 14 is connected to the corresponding bladder grouting body via a control valve.

[0093] Please refer to Figure 3 As shown, the bladder grouting body plays the role of expansion support and radial grouting at the same time, and includes a first control valve 11, a telescopic pipe 12, a second control valve 13, a connecting pipe 14, an arcuate groove 15, a bladder 16, and a cross opening 17; the bladder grouting body includes two hemispherical bladders 16; the pipe string 2 is provided with two arcuate grooves 15 on the outer wall in the circumferential direction; the bladder 16 is folded and fixed in the arcuate groove 15 in the initial state; the second control valve 13 and the first control valve 11 are control valve components;

[0094] A telescopic tube 12 is provided in the middle of the sac 16, one end of which is connected to the connecting tube 14 through the second control valve 13; the other end of the telescopic tube 12 passes through the sac 16 and is connected to the outside of the sac 16, and the inside of the sac 16 is connected to the connecting tube 14 through two first control valves 11; a cross opening 17 is opened on the outer wall of each sac 16.

[0095] Example 2

[0096] This embodiment discloses an operation method of a bladder grouting body in a combined pumping and injection bladder pressurized soil reinforcement device, which is further described based on the above embodiment.

[0097] Lower the pipe string 2 into the pile hole. Based on the predicted distribution of foundation pit soil layers, selectively increase or decrease the number of capsule grouting bodies and suction holes 5 to achieve the adaptation of the soil layers to the grouting and drainage operations.

[0098] In response to large water output in a local area, the plugging mechanism 3 corresponding to the lowering depth is selected and adjusted by the linkage mechanism to contact and seal the suction hole 5. The flow space inside the pipe string 2 is utilized to discharge water outward under the pumping action of the pump. At the same time as the pumping begins, the plugging mechanisms 3 corresponding to the remaining areas can be selected to be closed, and multiple groups of sac-type grouting bodies can start to spray grouting outward after a certain period of pumping, so as to achieve the solidification operation of the area around the pile hole.

[0099] Furthermore, the bladder grouting body is significantly different from the existing expansion bladders used to seal pile holes or increase support areas. The bladder grouting body in this embodiment has two usage modes.

[0100] Among them, method 1: when the soil layer is a conventional soil sample, the volume of the bag grouting body will not change and the slurry can be directly sprayed outward for solidification;

[0101] Method 2: When the soil layer is soft soil or silt soil with high water content, or rock layer, the bladder grouting body can expand its volume and perform pressurization treatment inside it, so that the radiation area of ​​the slurry is increased and the reinforcement effect is improved.

[0102] The upper end of the pipe string 2 is open to facilitate the installation of various components, and the lower end of the pipe string 2 is provided with a cone tip 1 to facilitate the smooth downward movement of the pipe string 2 in the pile hole.

[0103] The purpose of setting up the bladder grouting body is to deal with different soil samples, including:

[0104] Step S1: The bladder grouting body and the suction effect of the suction hole 5 are effectively coordinated. When the bladder grouting body realizes two functions, the second control valve 13 is opened, so that the slurry moves smoothly into the telescopic tube 12 through the connecting tube 14 connected to the grouting pipe 9, and is discharged outward from the end of the telescopic tube 12;

[0105] Step S2: close the second control valve 13 and open the two first control valves 11, so that the slurry smoothly enters the capsule 16 through the connecting pipe 14 and accumulates inside the capsule 16;

[0106] Step S3: After the volume of the capsule 16 is expanded, as the slurry is continuously injected, the slurry in the capsule 16 radiates radially outward through the multiple cross openings 17 on the outer wall of the capsule 16;

[0107] Step S4: Under the premise of maintaining a certain grouting pressure on the ground, as the internal pressure of the bladder 16 increases, the cross opening 17 can be opened only after the volume expands to a certain extent;

[0108] Due to the reduction of the flow cross-section, the pressure of the slurry sprayed outward will be increased to a certain extent. On the basis of the increase in the spray path, the slurry discharge pressure is increased, which can effectively increase the slurry flow rate per unit time and reduce the efficiency of the slurry solidification caused by the residual water after drainage in the soft soil layer.

[0109] Example 3

[0110] This embodiment discloses a pumping and injection combined bladder type pressurized soil reinforcement device, please refer to Figure 3 As shown, further introduction is given based on the above embodiment;

[0111] The capsule 16 is placed in the arc-shaped groove 15 and expands into a hemispherical shape after grouting.

[0112] In order to increase the grouting efficiency of the grouting pipe 9, a grouting branch pipe 8 is added between the ring pipe 4 and the connecting pipe 14, and a third control valve is provided at the connection between the grouting branch pipe 8 and the connecting pipe 14;

[0113] Two first control valves 11 and one second control valve 13 are provided on the main body of the grouting branch pipe 8, so that the grouting path of each group of air bags can be adjusted;

[0114] If the second group of air bags from top to bottom needs to be grouting, the slurry can be moved downward from a grouting branch pipe 8 of the first group of air bags to the annular pipe 4 in the second group of air bags by closing a third control valve in the first group of air bags, rather than being injected through two grouting branches 8. This can greatly reduce the amount of slurry in the entire grouting pipe 9 during grouting (this part of the slurry remains in the grouting pipe 9 and is not directly injected into the soil).

[0115] Preferably, the first control valve 11, the second control valve 13 and the third control valve are solenoid valves, and by performing high-level waterproofing treatment on their circuits, remote and precise control of the grouting volume can be achieved.

[0116] Preferably, each group of capsules 16 is hemispherical after expansion, which can support the corresponding pile hole wall to a certain extent;

[0117] Two adjacent groups of capsules 16 are staggered along the axial direction of the string 2. That is, when all capsules 16 are expanded, in the forward projection of the string 2, each group of capsules 16 is located at a different point on the circumference of the string 2.

[0118] This type of design can ensure that the multiple bladders 16 provide more uniform support to the inner wall of the pile hole during the expansion process, especially when encountering soft soil layers. When the multiple groups of bladders 16 expand, the outer wall of the pipe column has multiple directions of action and reaction forces, rather than two single directions of force.

[0119] Example 4

[0120] This embodiment discloses a pumping and injection combined bladder type pressurized soil reinforcement device, please refer to Figure 4 As shown, further introduction is given based on the above embodiment;

[0121] The blocking mechanism 3 includes an outer sleeve 7, a plurality of connecting plates 301 arranged circumferentially along the outer wall of the outer sleeve 7, and a blocking plate 302 connected to the outer end of the connecting plate 301. The axis of the outer sleeve 7 coincides with the axes of the plurality of annular tubes 4. Each group of suction channels includes a plurality of suction units arranged at intervals along the circumference of the pipe string 2. Each suction unit includes a plurality of suction holes 5 arranged radially along the pipe string 2.

[0122] The outer wall of each blocking plate 302 matches the inner wall of the pipe string 2 and can completely block one suction unit;

[0123] A chute 21 is formed on the inner wall of the outer sleeve 7, and a movable groove 20 is formed on the inner wall of the outer sleeve 7 to communicate with the chute 21; along the radial direction of the outer sleeve 7, the groove depth of the movable groove 20 is greater than the groove depth of the chute 21;

[0124] A linkage mechanism with multiple linkage units is placed in the outer sleeve 7. Each linkage unit can switch between the movable groove 20 and the slide groove 21. By adjusting the movement of the linkage unit, different blocking mechanisms 3 can be used to control the opening and closing of the corresponding suction units.

[0125] Two adjacent outer sleeves 7 are rotationally connected via a movable seal.

[0126] The main function of the blocking mechanism 3 is to control the opening and closing of each group of suction channels and selectively perform drainage treatment on the foundation pit soil layer.

[0127] Example 5

[0128] This embodiment discloses an operating method of a linkage mechanism in a pumping and injection combined bladder-type pressurized soil reinforcement device. Figure 5 As shown, further introduction is given based on the above embodiment;

[0129] In the initial state, the multiple blocking mechanisms 3 keep each group of suction channels closed. The linkage units that respectively realize the rotation of the different blocking mechanisms 3 are placed in the movable groove 20. Even if the linkage mechanisms rotate, the blocking mechanisms 3 still maintain the blocking state.

[0130] When making specific adjustments, the steps include:

[0131] 1. The linkage mechanism performs relevant actions, such as moving vertically downward so that the linkage unit enters the chute 21 and temporarily forms a whole with the blocking mechanism 3. Then, after rotating, it can drive the blocking mechanism 3 corresponding to the area where extraction and drainage need to be performed to rotate, so that the blocking plate 302 releases the blockage of the group of suction channels;

[0132] 2. Then, under the pumping effect of the external pump, the liquid accumulated inside the pipe string 2 is discharged;

[0133] 3. When it is necessary to balance the pressure at different depths of the soil layer, one of the possible ways is to reclose the opened suction channel. At this time, it is only necessary to rotate the corresponding linkage unit in the opposite direction to reset the blocking plate 302 and move the linkage unit up and reset it to the movable groove 20.

[0134] By operating the different linkage mechanisms individually, the suction channel can be selectively opened and closed, making the construction operation more flexible during the reinforcement process. It should be further explained that the adjacent outer sleeves 7 are rotatably connected by a movable seal to ensure that the multiple blocking mechanisms 3 can be operated independently.

[0135] Example 6

[0136] This embodiment discloses a pumping and injection combined bladder type pressurized soil reinforcement device, please refer to Figure 6 As shown, further introduction is given based on the above embodiment;

[0137] The linkage mechanism includes a primary linkage rod 18, a secondary linkage rod 22 and a tertiary linkage rod 23. A secondary linkage rod 26 is provided along the axial direction of the primary linkage rod 18 and a tertiary linkage rod 29 is provided along the axial direction of the secondary linkage rod 26.

[0138] Slide blocks 19 that cooperate with the slide grooves 21 are respectively provided on the outer walls of the primary linkage rod 18, the secondary linkage rod 22, and the tertiary linkage rod 23;

[0139] The secondary linkage rod 22 is fixed to the lower extension section of the secondary link 26, and the tertiary linkage rod 23 is fixed to the lower extension section of the tertiary link 29;

[0140] A primary square column 25 and a primary connecting plate 24 are sleeved on the upper extension section of the secondary connecting rod 26, which are sequentially connected from top to bottom. A secondary square column 28 and a secondary connecting plate 27 are sequentially connected from top to bottom at the end of the upper extension section of the secondary connecting rod 26. A tertiary square column 31 and a tertiary connecting plate 30 are sequentially connected from top to bottom at the end of the upper extension section of the tertiary connecting rod 29.

[0141] The adjustment mechanism provided at the top of the pipe string 2 can realize the circumferential rotation and vertical movement of the primary linkage rod 18 , the secondary linkage rod 22 and the tertiary linkage rod 23 .

[0142] Example 7

[0143] This embodiment discloses an operating method of a linkage mechanism in a combined pumping and injection bladder-type pressurized soil reinforcement device, which is further described based on the above embodiment.

[0144] As the key component of the adjustment, the linkage mechanism can select more than three linkage units according to the actual selection. This technical solution is described in detail with three linkage units, as follows:

[0145] Step Sa, after the primary linkage rod 18, the secondary linkage rod 22, and the tertiary linkage rod 23 are sleeved, they are placed in the outer sleeve 7, and sliders 19 that cooperate with the slide grooves 21 are respectively provided on the outer walls of the primary linkage rod 18, the secondary linkage rod 22, and the tertiary linkage rod 23;

[0146] Step Sb, wherein the three linkage rods can move separately, and the movement includes vertical movement adjustment and circumferential rotation to achieve the matching and dismatching of the slider 19 and the slide groove 21;

[0147] Step Sc, when achieving vertical movement, the movement of the secondary linkage rod 22 is coordinated with the adjustment unit in the adjustment mechanism adapted to the secondary square column 28, that is, the adjustment unit is connected to the secondary connection plate 27 via the connecting piece 42. The adjustment unit begins to move downward under the push of the power output component, driving the secondary connecting rod 26 to move vertically downward. The secondary connecting rod 26 moves inside the primary linkage rod 18, thereby driving the secondary linkage rod 22 to move downward. At the same time, the slider 19 on the secondary linkage rod 22 enters the slide groove 21 from the movable groove 20. At this time, the secondary linkage rod 22 is temporarily connected to the outer sleeve 7 as a whole;

[0148] Step Sd: When the circumferential rotation is realized, the regulating unit is directly rotated under the drive of the external power device, and the outer sleeve 7 which forms a whole with it also rotates synchronously, that is, the blocking plate 302 controls the opening and closing of the suction channel.

[0149] It should be noted that, since each outer sleeve 7 is provided with a movable groove 20, the primary linkage rod 18, the secondary linkage rod 22 and the tertiary linkage rod 23 move independently in the vertical direction, and when they rotate in the circumferential direction, the three movements are synchronized. For example, when the secondary linkage rod 22 drives the corresponding outer sleeve 7 to rotate, the primary linkage rod 18 and the tertiary linkage rod 23 rotate idly.

[0150] Furthermore, since the area covered by the drainage holes in each drainage unit is relatively small and the rotation amplitude during circumferential rotation is relatively small, the grouting branch pipe 8 and the connecting pipe 14 arranged axially along the pipe column 2 will not affect the rotation of the sealing plate 302 .

[0151] Preferably, the slide groove 21 is in a cross shape, and the number of the matching sliders 19 is 4, which is the optimal setting number. It can increase the contact area between the linkage rod and the outer sleeve 7 and improve the movement stability.

[0152] Example 8

[0153] This embodiment discloses a pumping and injection combined bladder type pressurized soil reinforcement device, please refer to Figure 7 As shown, further introduction is given based on the above embodiment;

[0154] Furthermore, as a supplement to the linkage mechanism, the adjustment mechanism includes a connecting column 35, a limiting plate 37, and a primary downward pressure tube 40, a secondary downward pressure tube 39, and a tertiary downward pressure tube 38, which are sequentially sleeved from the outside to the inside. The primary downward pressure tube 40, the secondary downward pressure tube 39, and the tertiary downward pressure tube 38 are all square tubes and match the shapes of the primary steering column, the secondary square column 28, and the tertiary square column 31, respectively.

[0155] The lower end of the connecting column 35 is rotatably connected to the middle of the limiting plate 37 and is used to provide vertical support for the limiting plate 37;

[0156] Please refer to Figure 8 As shown, two limiting units are provided on the upper surface of the limiting plate 37. Each limiting unit includes a primary limiting hole 45, a secondary limiting hole 46, and a tertiary limiting hole 47 which are arranged in sequence from the outside to the inside along the radial direction of the limiting plate 37 and are in an arc shape.

[0157] A bottom plate 36 is slidably mounted on each of the primary limiting hole 45, the secondary limiting hole 46, and the tertiary limiting hole 47. A cylinder 43 is vertically mounted on the bottom plate 36. A primary guide rod 34, a secondary guide rod 33, and a tertiary guide rod 32 are respectively mounted on the upper end surfaces of the primary down-pressure tube 40, the secondary down-pressure tube 39, and the tertiary down-pressure tube 38.

[0158] The primary guide rod 34 extends vertically upward to flexibly pass through the primary limiting hole 45 and the bottom plate 36 located on the primary limiting hole 45, and is connected to the corresponding output end of the oil cylinder 43;

[0159] The secondary guide rod 33 extends vertically upward to movably pass through the secondary limiting hole 46, and then to the bottom plate 36 located above the secondary limiting hole 46, and then to the corresponding output end of the oil cylinder 43; the tertiary guide rod extends vertically upward to movably pass through the tertiary limiting hole 47, and then to the bottom plate 36 located above the tertiary limiting hole 47, and then to the corresponding output end of the oil cylinder 43;

[0160] A driving gear 41 matching with the primary down-pressing tube 40 is sleeved on the outer wall thereof.

[0161] The adjustment mechanism is matched with the three-level linkage unit, which also includes three-level adjustment units. The three linkage units can be adjusted individually in the vertical direction and synchronously in the circumferential direction;

[0162] A square hole is opened in the middle of the driving gear 41, and the primary pressure-down pipe 40, the secondary pressure-down pipe 39 and the tertiary pressure-down pipe 38 are all square tubes;

[0163] The output end of the external motor is provided with a driving gear meshing with the driving gear 41, which can drive the driving gear 41, the primary down-pressure tube 40, the secondary down-pressure tube 39 and the tertiary down-pressure tube 38 to perform circumferential motion;

[0164] The primary guide rod 34, the secondary guide rod 33, and the tertiary guide rod 32 are located on the limit plate 37. The output end of the oil cylinder 43 is extended and retracted to drive the three levels of the downward pressure pipe to extend and retract.

[0165] Taking the movement of the two primary guide rods 34 as an example, two three-level limiting holes 47 that cooperate with the primary guide rods 34 are opened on the upper surface of the limiting plate 37. The upper end of each primary guide rod 34 is movable through the three-level limiting hole 47 and the bottom plate 36 and is connected to the output end of the cylinder 43 through the connecting fastener 44. The lower end of the primary guide rod 34 is connected to the upper end face of the primary down-pressure tube 40. The output end of the cylinder 43 can drive the primary guide rod 34, the primary down-pressure tube 40 and the primary linkage rod 18 to make a linear reciprocating movement, and even under the premise of rotating the driving gear 41, the linear reciprocating motion is not affected.

[0166] The arc length corresponding to the three-stage limiting hole 47 is the limit range of rotation of the primary downward pressure tube 40 , the secondary downward pressure tube 39 and the tertiary downward pressure tube 38 .

[0167] Preferably, the circles corresponding to the arcs of the primary limiting holes 45, the secondary limiting holes 46 and the tertiary limiting holes 47 are set to be concentric with the limiting plate 37, which can ensure that the rotation of the primary down-pressure tube 40, the secondary down-pressure tube 39 and the tertiary down-pressure tube 38 remains at the same frequency.

[0168] The foregoing description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any variation, modification, replacement, integration, or parameter change to these embodiments, which is within the spirit and principles of the present invention and which achieves the same functionality through conventional substitutions, without departing from the principles and spirit of the present invention, falls within the scope of protection of the present invention.

Claims

1. A combined pumping and injection type bladder pressurized soil reinforcement device, characterized in that: The device comprises a cone tip (1), a pipe column (2), a blocking mechanism (3), a ring pipe (4), a suction hole (5), a primary air bag (6), an outer sleeve (7), a grouting branch pipe (8), a grouting pipe (9), and a secondary air bag (10); The cone tip (1) is located at the lower end of the pipe string (2); The pipe column (2) is provided with a bag-type grouting body on its outer wall in the axial direction; The sac-type grouting bodies and the suction holes (5) are alternately distributed; A blocking mechanism (3) matching the suction hole (5) is provided in the pipe column (2), and the blocking mechanism (3) blocks or opens the suction channel in the suction hole (5) through a linkage mechanism; A grouting pipe (9) is provided in the pipe column (2), and the lower end of the grouting pipe (9) is connected to the ring pipe (4); The axis of the annular tube (4) coincides with the axis of the outer sleeve (7); The grouting branch pipe (8) is arranged outside the outer casing (7); The primary air bag (6) is arranged inside the pipe string (2) and outside the grouting branch pipe (8); The secondary airbag (10) is arranged inside the column (2) and located at the lower end of the suction hole (5); The outer wall of the outer sleeve (7) is provided with a blocking mechanism (3); The bladder grouting body comprises a first control valve (11), a telescopic pipe (12), a second control valve (13), a connecting pipe (14), an arc-shaped groove (15), a bladder body (16), and a cross opening (17); The sac-type grouting body includes two hemispherical sacs (16); The pipe column (2) is provided with two arc-shaped grooves (15) on the outer wall in the circumferential direction; The capsule (16) is folded and fixed in the arc-shaped groove (15) in the initial state; The second control valve (13) and the first control valve (11) are control valve components, the connecting pipe (14) connects the two adjacent annular pipes (4), and a grouting branch pipe (8) is additionally provided between the annular pipe (4) and the connecting pipe (14); A telescopic tube (12) is provided in the middle of the bladder (16), and one end of the telescopic tube (12) is connected to the grouting branch pipe (8) through a second control valve (13); The other end of the telescopic tube (12) passes through the bladder (16) and is connected to the outside of the bladder (16), and the inside of the bladder (16) is connected to the grouting branch pipe (8) through two first control valves (11); a cross opening (17) is opened on the outer wall of each bladder (16).

2. A pumping and injection combined bladder pressurized soil reinforcement device according to claim 1, characterized in that Each connecting pipe (14) is communicated with the corresponding sac-type grouting body through the control valve member.

3. The pumping and injection combined bladder pressurized soil reinforcement device according to claim 1, characterized in that: The capsules (16) are staggeredly distributed along the axial direction of the pipe column (2).

4. The pumping and injection combined bladder-type pressurized soil reinforcement device according to claim 1 is characterized in that: The blocking mechanism (3) comprises a connecting plate (301) and a blocking plate (302); The blocking mechanism (3) is provided with a connecting plate (301) along the circumferential direction of the outer wall of the outer sleeve (7); The outer end of the connecting plate (301) is connected to the blocking plate (302).

5. The pumping and injection combined bladder-type pressurized soil reinforcement device according to claim 1 is characterized in that: The suction channel comprises suction units arranged at intervals along the circumference of the pipe string (2); The suction unit comprises a suction hole (5) arranged along the radial direction of the pipe column (2).

6. The pumping and injection combined bladder-type pressurized soil reinforcement device according to claim 4 is characterized in that: The outer wall of the blocking plate (302) matches the inner wall of the pipe column (2) and can completely block a suction unit; The inner wall of the outer sleeve (7) is provided with a slide groove (21); the slide groove (21) is cross-shaped; A movable groove (20) is formed on the inner wall of the outer sleeve (7), and the movable groove (20) is connected to the slide groove (21); The groove depth of the movable groove (20) is greater than the groove depth of the sliding groove (21) along the radial direction of the outer sleeve (7); A linkage unit is provided in the outer sleeve (7), and the linkage unit can be switched between the movable groove (20) and the slide groove (21), and by adjusting the movement of the linkage unit, different blocking mechanisms (3) can be used to control the opening and closing of the corresponding suction units. Two adjacent outer sleeves (7) are connected in rotation via a movable seal.

7. The pumping and injection combined bladder-type pressurized soil reinforcement device according to claim 6, characterized in that: The linkage mechanism comprises a primary linkage rod (18), a secondary linkage rod (22), and a tertiary linkage rod (23); A secondary connecting rod (26) is provided in the axial direction of the primary linkage rod (18); A third-stage connecting rod (29) is provided in the axial direction of the second-stage connecting rod (26); Slide blocks (19) that cooperate with the slide grooves (21) are respectively provided on the outer walls of the primary linkage rod (18), the secondary linkage rod (22), and the tertiary linkage rod (23); The secondary linkage rod (22) is fixed on the lower extension section of the secondary connecting rod (26), and the tertiary linkage rod (23) is fixed on the lower extension section of the tertiary connecting rod (29); The upper extension section of the secondary connecting rod (26) is sleeved with a primary square column (25) and a primary connecting plate (24) which are sequentially connected from top to bottom; The end of the upper extension section of the secondary connecting rod (26) is provided with a secondary square column (28) and a secondary connecting plate (27) which are sequentially connected from top to bottom; The end portion of the upper extension section of the three-stage connecting rod (29) is provided with a three-stage square column (31) and a three-stage connecting plate (30) connected in sequence from top to bottom; An adjustment mechanism is provided on the top of the pipe column (2), and the adjustment mechanism can respectively realize the circumferential rotation and vertical movement of the primary linkage rod (18), the secondary linkage rod (22) and the tertiary linkage rod (23).

8. The pumping and injection combined bladder-type pressurized soil reinforcement device according to claim 7 is characterized in that: The regulating mechanism comprises a connecting column (35), a limiting plate (37), and a primary downward pressure pipe (40), a secondary downward pressure pipe (39), and a tertiary downward pressure pipe (38) which are sequentially sleeved from the outside to the inside; The primary downward pressure tube (40), the secondary downward pressure tube (39) and the tertiary downward pressure tube (38) are all square tubes and respectively match the shapes of the primary steering column, the secondary square column (28) and the tertiary square column (31); The lower end of the connecting column (35) is rotatably connected to the middle of the limiting plate (37) and is used to provide vertical support for the limiting plate (37); Two limiting units are provided on the upper surface of the limiting disk (37), and the limiting units include a primary limiting hole (45), a secondary limiting hole (46), and a tertiary limiting hole (47) which are arranged in sequence from the outside to the inside along the radial direction of the limiting disk (37) and are in an arc shape; A bottom plate (36) is slidably provided on each of the primary limiting hole (45), the secondary limiting hole (46), and the tertiary limiting hole (47); An oil cylinder (43) is vertically provided on the bottom plate (36); The upper end surfaces of the primary downward pressure tube (40), the secondary downward pressure tube (39) and the tertiary downward pressure tube (38) are respectively provided with a primary guide rod (34), a secondary guide rod (33) and a tertiary guide rod (32); The primary guide rod (34) extends vertically upward to movably penetrate the primary limiting hole (45), is located on the bottom plate (36) on the primary limiting hole (45), and is connected to the output end of the corresponding oil cylinder (43); The secondary guide rod (33) extends vertically upward to the bottom plate (36) that is movable through the secondary limiting hole (46) and located on the secondary limiting hole (46), and is connected to the output end of the corresponding oil cylinder (43); The three-level guide extends vertically upward to the bottom plate (36) that is movable through the three-level limiting hole (47) and located on the three-level limiting hole (47), and is connected to the output end of the corresponding oil cylinder (43); A driving gear (41) matching with the primary downward pressure tube (40) is sleeved on the outer wall thereof.

9. The pumping and injection combined bladder-type pressurized soil reinforcement device according to claim 8, characterized in that: The circles corresponding to the arcs where the primary limiting hole (45), the secondary limiting hole (46), and the tertiary limiting hole (47) are located are concentric with the limiting plate (37).

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