A shield tunnel supporting sub-surface grouting equipment based on underpassing dry canal

Abstract

The present application relates to a kind of tunnel support subface grouting equipment based on underpass dry canal of tunnel support subface grouting technical field, including hopper, storage cylinder, push material hydraulic cylinder, swing elbow pipe structure, further include: transition cone pipe, install between swing elbow pipe structure discharge end and grouting hose;Supplementary cylinder is communicated with the upper side of transition cone pipe by supplementary square tube, supplementary cylinder inner chamber is equipped with the supplementary pressure plate that can move up and down, for during swing elbow pipe structure swing, supplementary pressure plate moves down and extrudes supplementary cylinder inner grout to supplement in transition pipe, reach the purpose of continuous stable grouting;The present application is linked by the linkage design of supplementary cylinder and eccentric flap, when storage cylinder switches feed, supplementary pressure plate automatically moves down and reversely pressurizes storage grout into transition cone pipe, realizes uninterrupted supplementary material, significantly reduces grouting pressure fluctuation, avoids ground heave or subsidence caused by pressure mutation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel supporting surface grouting, and particularly to a shield tunnel supporting surface grouting device based on underpassing a dry canal. BACKGROUND

[0002] When a shield tunnel passes through a dry canal, grouting equipment is needed to inject grout into the shield tunnel supporting surface to enhance the stability of surrounding rock and prevent collapse and water seepage. The entire grout needs to be sent into the shield tunnel by an external pump truck, and the grout entering the shield tunnel needs to be added with cement, bentonite and water glass in a secondary mixer before being pumped to the grouting position on the shield machine by the grouting equipment, and then the shield machine injects the grout into the shield tunnel supporting surface position.

[0003] For a shield tunnel, the internal space of the shield machine is limited, and a conical grouting pump is generally used to supply grout. During the entire feeding process, multiple storage cylinders are generally used to alternate feeding. Figures 1-2 As shown, it includes a hopper, one side of the hopper has a discharge pipe, the other side is communicated with two storage cylinders and a matching push hydraulic cylinder, the inner cavity of the hopper has a swing elbow structure, the rotating end of the swing elbow structure is connected with the discharge pipe, and the swing end alternately communicates with the two storage cylinders. However, the alternate feeding of the two storage cylinders makes the grout flow in the grouting hose unstable, which leads to fluctuations in grouting pressure. When the grouting pressure is too large, it will cause the ground surface in front of the supporting surface to rise, and when the grouting pressure is too small, it will cause the ground surface to sink. Moreover, the existing grouting equipment also has the risk of water hammer when the grouting hose or grouting position is blocked, or even the risk of grouting hose rupture.

[0004] Therefore, we designed a shield tunnel supporting surface grouting device based on underpassing a dry canal. SUMMARY

[0005] In order to overcome the deficiencies in the background art, the present application discloses a shield tunnel supporting surface grouting device based on underpassing a dry canal.

[0006] To achieve the above purpose, the present application adopts the following technical scheme:

[0007] A shield tunnel supporting surface grouting device based on underpassing a dry canal, including a hopper, one side of the hopper has a discharge pipe, the other side is communicated with two storage cylinders and a matching push hydraulic cylinder, the inner cavity of the hopper has a swing elbow structure, the rotating end of the swing elbow structure is connected with the discharge pipe, and the swing end alternately communicates with the two storage cylinders, characterized in that it further comprises:

[0008] A transition cone pipe is installed between the discharge pipe and the grouting hose.

[0009] The feeding cylinder is communicated with the upper side of the transition cone pipe through the feeding square pipe, and the inner cavity of the feeding cylinder is provided with a feeding pressing plate which can move up and down, so that the feeding pressing plate moves downward to extrude the slurry in the feeding cylinder to supplement the slurry into the transition cone pipe during the swing of the swing bend structure, and the purpose of continuous and stable grouting is achieved.

[0010] The eccentric flap is hinged in the feeding square pipe, the hinging axis of the eccentric flap deviates from the axis of the feeding square pipe, and the opening of the eccentric flap is automatically adjusted according to the flow direction of the slurry, so as to control the flow path and flow of the slurry between the feeding cylinder and the transition cone pipe.

[0011] Preferably, the hinging axis of the eccentric flap is located on the side of the feeding square pipe deviating from the transition cone pipe, so that when the slurry flows forward, the eccentric flap is turned upward by the fluid and only allows the slurry to flow into the feeding cylinder through the top gap of the eccentric flap; when the slurry flows reversely, the eccentric flap is turned downward and fully opens the flow cross section of the feeding square pipe.

[0012] Preferably, the inner cavity of the feeding cylinder is provided with a guide shaft penetrating the middle part of the feeding pressing plate, the lower plate surface of the feeding pressing plate is provided with a stirring shaft along the circumference, and a screwing structure is arranged between the feeding pressing plate and the shaft body of the guide shaft, and the stirring shaft produces periodic stirring effect on the slurry during the up and down movement of the feeding pressing plate.

[0013] Preferably, the shaft body of the stirring shaft is uniformly provided with a plurality of stirring blades.

[0014] Preferably, the stirring shaft comprises a plurality of shaft bodies which are sequentially nested, and the shaft body is uniformly provided with a plurality of stirring blades around the shaft body.

[0015] Preferably, the shaft body of the guide shaft is provided with a spring at a position above the feeding pressing plate.

[0016] Preferably, the upper end of the guide shaft protrudes out of the feeding cylinder, so that when the pressure in the transition cone pipe suddenly rises, the slurry quickly flows into the feeding cylinder through the top gap of the eccentric flap, and the feeding pressing plate is opened to release the pressure.

[0017] Preferably, the middle part of the feeding pressing plate is detachably provided with an inspection pressing plate.

[0018] Preferably, the grouting method of the grouting device comprises the following steps:

[0019] Grouting stage: the slurry in the storage cylinder is pushed by the pushing hydraulic cylinder to be transported to the transition cone pipe through the swing bend structure and the discharge pipe, and finally injected into the shield tunnel subface;

[0020] Pressure maintaining stage: during the continuous output of the slurry, part of the slurry flows into the feeding cylinder through the feeding square pipe, pushes the feeding pressing plate to move upward, and stores the compensation slurry;

[0021] Switching feeding stage: when the storage cylinder is empty, the swing elbow structure switches to another storage cylinder, the feeding pressure plate moves down, and the stored slurry is reversely pressed into the transition cone pipe to maintain the stability of the grouting pressure;

[0022] Anti-blocking stage: if the grouting hose is blocked, the pressure in the transition cone pipe rises suddenly, the slurry flows into the feeding cylinder through the gap on the top of the eccentric flap, and the feeding pressure plate is opened to release the pressure.

[0023] Preferably, the grouting method of the grouting device comprises the following steps:

[0024] Grouting stage: the slurry in the storage cylinder is pushed by the pushing hydraulic cylinder to be transported to the transition cone pipe through the swing elbow structure and the discharge pipe, and finally injected into the shield tunnel subface;

[0025] Pressure maintaining stage: during the continuous output of the slurry, part of the slurry flows into the feeding cylinder through the feeding square pipe, pushes the feeding pressure plate to move up and squeezes the spring, and stores the pressure compensation energy;

[0026] Switching feeding stage: when the storage cylinder is empty, the swing elbow structure switches to another storage cylinder, the spring is elongated, the feeding pressure plate is driven to move down, the stored slurry is reversely pressed into the transition cone pipe, and the stability of the grouting pressure is maintained;

[0027] Anti-blocking stage: if the grouting hose is blocked, the pressure in the transition cone pipe rises suddenly, the slurry flows into the feeding cylinder through the gap on the top of the eccentric flap, and the feeding pressure plate is opened to release the pressure.

[0028] Mixing stage: during the up and down movement of the feeding pressure plate, the feeding pressure plate drives the stirring shaft to rotate under the action of the guide shaft to stir the slurry, preventing the slurry in the feeding cylinder from settling and separating.

[0029] Compared with the prior art, the beneficial effects of the present application are:

[0030] 1. Through the linkage design of the feeding cylinder and the eccentric flap, when the storage cylinder switches the feeding, the feeding pressure plate automatically moves down to reversely press the stored slurry into the transition cone pipe, realizes uninterrupted feeding, significantly reduces the grouting pressure fluctuation (the fluctuation range can be controlled within ±0.2 MPa), and avoids the ground uplift or settlement caused by pressure sudden change;

[0031] 2. Through the offset design of the hinge axis of the eccentric flap, it can automatically adjust the opening according to the slurry flow direction. When the grouting hose is blocked, the pressure in the transition cone pipe rises suddenly, the slurry flows into the feeding cylinder through the gap on the top of the eccentric flap (preferably 3-8 mm), the feeding pressure plate is opened to release the pressure, effectively eliminates the water hammer effect, and reduces the risk of hose rupture;

[0032] 3. The feeding plate, connected to the guide shaft and the mixing shaft, drives the mixing shaft to periodically stir the slurry during its up-and-down movement, breaking the static stagnation of the slurry and preventing components such as cement and bentonite from settling and separating due to gravity, thus ensuring the consistency of the grouting material performance.

[0033] 4. By replacing the traditional counterweight with the elastic potential energy of the spring, the structural weight of the feeding plate is significantly reduced, and the volume of the feeding cylinder is reduced by about 30%, which is more suitable for the installation requirements of the narrow space inside the tunnel boring machine and is applicable to complex working conditions such as the South-to-North Water Diversion Project. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of grouting equipment in the prior art;

[0035] Figure 2 This is a schematic diagram of the structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the first structure of the hopper, transition cone tube, and feeding cylinder in this invention;

[0037] Figure 4 This is a cross-sectional view of the first structure of the hopper, transition cone tube, and feeding cylinder in this invention;

[0038] Figure 5 This is a schematic diagram of the second structure of the hopper, transition cone tube, and feeding cylinder in this invention;

[0039] Figure 6 This is a cross-sectional view of the second structure of the hopper, transition cone tube, and feeding cylinder in this invention;

[0040] Figure 7 This is a cross-sectional view of the third structure of the hopper, transition cone tube, and feeding cylinder in this invention.

[0041] In the diagram: 1. Hopper; 11. Discharge pipe; 2. Swinging bend structure; 3. Pushing hydraulic cylinder; 4. Storage cylinder; 5. Transition cone pipe; 6. Feeding square tube; 61. Eccentric flap; 7. Feeding cylinder; 71. Feeding pressure plate; 72. Guide shaft; 73. Agitating shaft; 731. Shaft body; 74. Agitating blade; 75. Spring; 76. Inspection pressure plate. Detailed Implementation

[0042] The application can be explained in detail by the following examples, the purpose of the disclosure is to protect all technical improvements within the scope of the application, in the description of the application, it is understood that if the terms "upper", "lower", "front", "rear", "left", "right" and the like indicate the orientation or positional relationship, only the corresponding to the drawings of the present application, in order to facilitate the description of the application; it is understood that if the terms "end", "side", "end", "side", "transverse", "longitudinal" and the like indicate the orientation or positional relationship, only the corresponding length and width of the corresponding parts, that is, "end" indicates the head and tail area of the length direction of the corresponding part, "side" indicates the head and tail area of the width direction of the corresponding part; In order to facilitate the description of the application rather than indicating or implying that the device or element referred to must have a particular orientation.

[0043] Embodiment one, combined with the attached Figures 2-4 A kind of based on shield tunnel of underpass dry canal to support face grouting equipment, including hopper 1, hopper 1 one side has a discharge pipe 11, the other side is communicated with two storage cylinders 4 and with the matching push material hydraulic cylinder 3, the inner cavity of hopper 1 has swing elbow structure 2, swing elbow structure 2 rotating end is connected with discharge pipe 11, swing end is alternately communicated with two storage cylinders 4;It needs to be explained that: swing elbow structure 2, hopper 1, push material hydraulic cylinder 3 and storage cylinder 4 all adopt prior art, which will not be repeated here.

[0044] Further comprising: transition cone pipe 5, is installed between discharge pipe 11 and grouting hose;

[0045] Further, the outlet end of transition cone pipe 5 is designed in a conical shape, the outlet end is connected with the grouting hose, and the inlet end is communicated with the swing elbow structure 2. That is, without changing the original equipment structure, the transition cone pipe 5 can be better assembled.

[0046] The upper side of the transition cone pipe is provided with a supplementary material square pipe 6.

[0047] The supplementary material cylinder 7 is vertically installed above the supplementary material square pipe 6, and the inner cavity of the supplementary material cylinder 7 is provided with a supplementary material pressing plate 71 movable up and down, which is used to move down during the swing of the swing elbow structure 2 to extrude the grout in the supplementary material cylinder 7 to the transition cone pipe 5 to supplement, so as to achieve the purpose of continuous and stable grouting.

[0048] According to the need, a sealing structure is arranged between the supplementary material pressing plate 71 and the inner wall of the supplementary material cylinder 7 to ensure the continuity of the grout pressure transmission in the supplementary material cylinder 7. The sealing structure adopts the structure of rubber sealing ring in the prior art, which is not limited and repeated here.

[0049] The eccentric flap 61 is hinged inside the feeding square tube 6, and the hinge axis of the eccentric flap 61 deviates from the axis of the feeding square tube 6. The eccentric flap 61 automatically adjusts the opening degree according to the flow direction of the slurry, and is used to control the slurry flow path and flow rate between the feeding cylinder 7 and the transition cone tube.

[0050] Further, the hinge axis of the eccentric flap 61 is located on the side of the transition cone tube 5 from the feeding square tube 6, so that when the slurry flows forward, the eccentric flap 61 is pushed upward by the fluid and only allows the slurry to flow into the feeding cylinder 7 through the top gap; when the slurry flows reversely, the eccentric flap 61 is turned downward and fully opens the flow cross section of the feeding square tube 6.

[0051] It should be noted that the top gap of the eccentric flap 61 can be understood as the gap between the top of the eccentric flap 61 and the corresponding side wall of the feeding square tube 6, or the cross section of the feeding square tube 6 not blocked by the eccentric flap 61.

[0052] Specifically, when the slurry flows forward, the eccentric flap 61 is still in an inclined state after being pushed upward by the fluid, and the bottom of the eccentric flap 61 abuts against the corresponding side wall of the feeding square tube 6, and the top of the eccentric flap 61 has a gap with the corresponding side wall of the feeding square tube 6.

[0053] It should be noted that the forward flow of the slurry can be understood as the pushing of the pushing hydraulic cylinder 3, and the slurry in the transition cone tube 5 flows into the feeding cylinder 7; similarly, the reverse flow of the slurry is that the slurry in the feeding cylinder 7 flows into the transition cone tube 5.

[0054] Preferably, the inner cross-sectional area of the feeding square tube 6 is the same as the inner cross-sectional area of the grouting hose, the hinge axis of the eccentric flap 61 deviates from the axis of the feeding square tube 6 by 15-20 mm, and the top gap of the eccentric flap 61 is 3-8 mm.

[0055] The grouting method of the embodiment includes:

[0056] The grouting stage: the slurry in the storage cylinder 4 is pushed by the pushing hydraulic cylinder 3 to be transported to the transition cone tube through the swing elbow structure 2 and the discharge pipe 11, and finally injected into the shield tunnel subface;

[0057] The pressure maintaining stage: during the continuous output of the slurry, part of the slurry flows into the feeding cylinder 7 through the feeding square tube 6, pushing the feeding pressure plate 71 to move upward and storing the compensation slurry;

[0058] The switching feeding stage: when the storage cylinder 4 is empty, the swing elbow structure 2 switches to another storage cylinder 4, the feeding pressure plate 71 moves downward, reversely pressurizes the stored slurry into the transition cone tube, and maintains the stable grouting pressure;

[0059] Anti-blocking stage: if the grouting hose is blocked, the pressure in the transition cone pipe rises suddenly, the slurry flows into the feeding cylinder 7 through the gap at the top of the eccentric flap 61 until the pressure is balanced. According to the needs, a pressure sensor (not shown) can be installed at the outlet of the transition cone pipe to monitor the grouting pressure in real time and feed back to the control system.

[0060] Embodiment two, combined with the attached Figures 5-6 A shield tunnel sub-face grouting device based on undercrossing dry canal, on the basis of embodiment one, the feeding cylinder 7 has a guide shaft 72 penetrating the middle of the feeding pressure plate 71, the lower surface of the feeding pressure plate 71 is provided with a stirring shaft 73 along its circumference, and the feeding pressure plate 71 and the shaft body of the guide shaft 72 are provided with a screw fitting structure, and the stirring shaft 73 produces periodic stirring effect on the slurry during the up-and-down movement on the feeding pressure plate 71.

[0061] According to the needs, combined with the attached Figures 6-7 The shaft body of the stirring shaft 73 is uniformly provided with a plurality of stirring blades 74.

[0062] Further, the screw fitting structure includes a spiral sliding groove provided on the shaft body of the guide shaft 72, and the feeding pressure plate 71 is provided with a central hole sleeved on the shaft body of the guide shaft 72, and the hole wall of the central hole is provided with a spiral sliding part matched with the spiral sliding groove.

[0063] That is, when the feeding pressure plate 71 moves, the feeding pressure plate 71 drives the stirring shaft 73 to move circularly to produce periodic stirring effect on the slurry, preventing the slurry in the feeding cylinder 7 from settling and separating.

[0064] Further, to ensure that the slurry in the upper and lower parts of the feeding cylinder 7 is stirred, the stirring shaft 73 includes a plurality of axles 731 stacked one after another, and the shaft body of the axle 731 is uniformly provided with a plurality of stirring blades 74.

[0065] In this embodiment, the middle of the feeding pressure plate 71 is detachably provided with a maintenance pressure plate 76.

[0066] The grouting method of this embodiment includes:

[0067] Grouting stage: the slurry in the storage cylinder 4 is pushed by the pushing hydraulic cylinder 3 to be delivered to the transition cone pipe through the swing elbow pipe structure 2 and the discharge pipe 11, and finally injected into the shield tunnel sub-face;

[0068] Pressure maintaining stage: during the continuous output of the slurry, part of the slurry flows into the feeding cylinder 7 through the feeding square pipe 6, pushing the feeding pressure plate 71 to move upwards, storing the compensation slurry;

[0069] Switching feeding stage: when the storage cylinder 4 is empty, the swing elbow pipe structure 2 switches to another storage cylinder 4, the feeding pressure plate 71 moves downwards, reversely pressing the stored slurry into the transition cone pipe, maintaining the stability of the grouting pressure;

[0070] Anti-blocking stage: if the grouting hose is blocked, the pressure in the transition cone pipe rises suddenly, the slurry flows into the feeding cylinder 7 through the gap on the top of the eccentric flap 61, until the pressure is balanced.

[0071] Mixing stage: during the up-and-down movement of the feeding plate 71, the feeding plate 71 drives the stirring shaft 73 to rotate under the action of the guide shaft 72, so as to stir the slurry and prevent the slurry in the feeding cylinder 7 from settling and separating.

[0072] Embodiment three, in combination with the drawings Figure 7 The difference between the embodiment one or two and the embodiment three is that the spring 75 is arranged on the guide shaft 72 above the feeding plate 71.

[0073] In this way, the elastic potential energy of the spring 75 can replace the weight of the feeding plate 71, that is, the volume of the feeding cylinder 7 can be effectively reduced.

[0074] According to the need, the upper end of the guide shaft 72 extends out of the feeding cylinder 7, so that when the pressure in the transition cone pipe 5 rises suddenly, the slurry flows into the feeding cylinder 7 through the gap on the top of the eccentric flap 61, and the feeding plate 71 is opened to release the pressure.

[0075] The parts of the present application not described in detail are prior art, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application; therefore, no matter from which point of view, the above embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the content of the involved claims.

Claims

1. A grouting device for the support face of a shield tunnel based on an underpass canal, comprising a hopper (1), one side of which has a discharge pipe (11), and the other side is connected to two storage cylinders (4) and a matching pusher hydraulic cylinder (3). The inner cavity of the hopper (1) has a swing bend structure (2), the rotating end of the swing bend structure (2) is connected to the discharge pipe (11), and the swing end of the swing bend structure (2) is alternately connected to the two storage cylinders (4), characterized in that: Also includes: A transition cone pipe (5) is installed between the discharge pipe (11) and the grouting hose; The feeding cylinder (7) is connected to the upper side of the transition cone pipe (5) through the feeding square tube (6). The inner cavity of the feeding cylinder (7) is provided with a feeding pressure plate (71) that can move up and down. During the swing of the swinging bend pipe structure (2), the feeding pressure plate (71) moves down and squeezes out the slurry in the feeding cylinder (7) to replenish the transition cone pipe (5) to achieve the purpose of continuous and stable grouting. The inner cavity of the feeding cylinder (7) is provided with a guide shaft (72) that passes through the middle of the feeding pressure plate (71). The lower plate surface of the feeding pressure plate (71) is provided with a stirring shaft (73) along its circumference. The feeding pressure plate (71) and the shaft body of the guide shaft (72) are provided with a spiral fit structure. The stirring shaft (73) generates a periodic stirring effect on the slurry during the up and down movement of the feeding pressure plate (71). An eccentric flap (61) is hinged inside the feeding square tube (6). The hinge axis of the eccentric flap (61) is offset from the axis of the feeding square tube (6). The eccentric flap (61) automatically adjusts its opening according to the slurry flow direction to control the slurry flow path and flow rate between the feeding cylinder (7) and the transition cone tube. The hinge axis of the eccentric flap (61) is located on the side of the feed tube (6) that is biased towards the feed side of the transition cone tube (5). When the slurry flows from the transition cone tube (5) to the feed cylinder (7), the eccentric flap (61) is pushed upward by the fluid and only allows the slurry to flow into the feed cylinder (7) through its top gap. Conversely, the eccentric flap (61) flips downward and fully opens the flow section of the feed tube (6).

2. The grouting equipment for the support face of a shield tunnel based on an underpass canal as described in claim 1, characterized in that: The stirring shaft (73) has multiple stirring blades (74) evenly arranged around its shaft body.

3. The grouting equipment for the support face of a shield tunnel based on an underpass canal as described in claim 2, characterized in that: The stirring shaft (73) includes a plurality of shaft bodies (731) stacked in sequence, and a plurality of stirring blades (74) are evenly arranged around the bottom shaft of the shaft body (731).

4. A grouting device for the support face of a shield tunnel based on an underpass canal, as described in any one of claims 1-3, characterized in that: The guide shaft (72) is provided with a spring (75) located above the feeding plate (71).

5. A grouting device for the support face of a shield tunnel based on an underpass canal, as described in claim 4, characterized in that: The upper end of the guide shaft (72) extends out of the feeding cylinder (7) so that the pressure inside the transition cone tube (5) rises sharply and the slurry flows into the feeding cylinder (7) quickly through the gap at the top of the eccentric flap (61), while the feeding pressure plate (71) is opened to release the pressure.

6. The grouting equipment for the support face of a shield tunnel based on an underpass canal as described in claim 1, characterized in that: A maintenance plate (76) is detachably installed in the middle of the material replenishing plate (71).

7. A grouting device for the support face of a shield tunnel based on an underpass canal, as described in any one of claims 1-4 and 6, characterized in that: The grouting method of this grouting equipment includes the following steps: Grouting stage: The grout in the storage cylinder (4) is pushed by the hydraulic cylinder (3) through the swing bend structure (2) and the discharge pipe (11) to the transition cone pipe, and finally injected into the shield tunnel support face; Pressure holding stage: During the continuous output of slurry, some slurry flows into the feeding cylinder (7) through the feeding square tube (6), pushing the feeding pressure plate (71) to move upward and storing compensation slurry; Switching feeding stage: When the storage cylinder (4) is emptied, the swing bend structure (2) switches to another storage cylinder (4), the feeding plate (71) moves down, and the stored slurry is reversed and pressed into the transition cone to maintain the grouting pressure. Anti-clogging stage: If the grouting hose becomes clogged, the pressure inside the transition cone tube will rise sharply, and the grout will flow into the feed cylinder (7) quickly through the gap at the top of the eccentric flap (61) until the pressure is balanced.

8. A grouting device for the support face of a shield tunnel based on an underpass canal, as described in claim 5, characterized in that: The grouting method of this grouting equipment includes the following steps: Grouting stage: The grout in the storage cylinder (4) is pushed by the pusher hydraulic cylinder (3) through the swing bend structure (2) and the discharge pipe (11) to the transition cone pipe, and finally injected into the shield tunnel support face; Pressure holding stage: During the continuous output of slurry, some slurry flows into the feeding cylinder (7) through the feeding square tube (6), pushing the feeding pressure plate (71) to move upward and squeezing the spring (75) to store pressure compensation energy; Switching feeding stage: When the storage cylinder (4) is emptied, the swing bend structure (2) switches to another storage cylinder (4), and at the same time the spring (75) extends, driving the feeding plate (71) to move down, pressing the stored slurry into the transition cone in the opposite direction, and maintaining the grouting pressure stable. Anti-clogging stage: If the grouting hose becomes clogged, the pressure inside the transition cone tube will rise sharply, and the grout will flow into the feeding cylinder (7) quickly through the gap at the top of the eccentric flap (61), while the feeding pressure plate (71) will be opened to release the pressure; Stirring stage: During the up-and-down movement of the feeding plate (71), the feeding plate (71) drives the stirring shaft (73) to rotate under the action of the guide shaft (72) to stir the slurry and prevent the slurry in the feeding cylinder (7) from settling and separating.

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