Shield muck synchronous grouting system

Abstract

The utility model relates to the technical field of shield tunnel engineering, in particular to a synchronous grouting system for shield muck. The system comprises a screw conveyor, a main belt conveyor, a secondary belt conveyor, a crusher, a stirrer, a curing agent storage device, a water storage tank and a mortar tank, the spiral conveyor is connected with the slag outlet end of the shield tunneling machine; a main belt conveyor is arranged at the end, away from the slag discharging end of the shield tunneling machine, of the spiral conveyor in a butt joint mode. A liftable secondary belt conveyor is arranged at the end, away from the spiral conveyor, of the main belt conveyor in a butt joint mode. A crusher is arranged at one end, far away from the main belt conveyor, of the secondary belt conveyor in a butt joint manner; a stirrer is arranged below the crusher in a butt joint manner; the curing agent storage device and the water storage tank are both connected with the stirrer; the mortar tank is arranged between the stirrer and the shield tunneling machine, and a mortar inlet connected with the stirrer and a mortar outlet connected with the shield tunneling machine are formed in the mortar tank. The synchronous grouting device can solve the problems existing in the traditional synchronous grouting preparation process.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel engineering technology, specifically to a shield tunnel excavation and soil synchronous grouting system. Background Technology

[0002] Tunnel boring machine (TBM) excavation soil is mostly composed of fine particles with a high moisture content, making it more hazardous than excavation soil from drilling and blasting or other mechanical excavation methods. Therefore, how to handle TBM excavation soil is one of the most prominent issues faced during subway construction. Traditional methods typically involve transporting the soil to designated waste disposal sites for open-air dumping or landfilling in the project's backfill area, which has several drawbacks. Specifically: First, various environmental and traffic safety problems frequently arise during soil transportation, such as dust and spillage due to inadequate sealing, and dump trucks running red lights, speeding, overloading, and illegal dumping. Second, waste disposal sites occupy valuable land resources, and with the development of large-scale subway construction, additional waste disposal sites are needed. Finally, the high moisture content and poor stability of TBM excavation soil make it prone to safety hazards if directly dumped without proper treatment.

[0003] The excavated soil from tunnel boring machines (TBMs) is mainly composed of crushed stone, sand, clay, and water. If properly treated, it can be used to prepare synchronous grouting materials. The traditional synchronous grouting preparation process is as follows: First, grout preparation at the mixing plant; second, grout transportation by tanker trucks; third, grout storage in the station's central slab; fourth, grout discharge from the central slab; fifth, grout transportation by battery-powered vehicle; sixth, grout storage in the mortar tank on the trolley; and seventh, synchronous grouting. However, the traditional synchronous grouting preparation process has a series of drawbacks. Specifically: First, it has low construction efficiency, a relatively complex process, and a long grout preparation time; second, since mortar mixing plants are generally located in suburban areas, the grout transportation time is long, and quality problems such as segregation or sedimentation may occur during transportation; in summer, when the construction temperature is high, the water evaporates quickly, which can also change the grout mix ratio and affect the grout's flowability and strength; third, the entire process requires multiple people to supervise, resulting in high manpower costs.

[0004] In conclusion, there is a need to develop a shield tunneling excavation and soil synchronous grouting system to solve the problems existing in the traditional synchronous grouting preparation process, which has significant social and economic benefits. Utility Model Content

[0005] The purpose of this utility model is to provide a synchronous grouting system for tunnel boring machine excavation, and the specific technical solution is as follows:

[0006] A shield tunneling excavation and soil synchronous grouting system includes a screw conveyor, a main belt conveyor, a secondary belt conveyor, a crusher, a mixer, a curing agent storage device, a water storage tank, and a mortar tank;

[0007] The screw conveyor is connected to the slag discharge end of the tunnel boring machine (TBM); the main belt conveyor is connected to the end of the screw conveyor away from the slag discharge end of the TBM; the liftable secondary belt conveyor is connected to the end of the main belt conveyor away from the screw conveyor; the crusher is connected to the end of the secondary belt conveyor away from the main belt conveyor; the mixer is connected below the crusher; the curing agent storage device and the water storage tank are both connected to the mixer; the mortar tank is located between the mixer and the TBM, and the mortar tank has an inlet and an outlet; the inlet is connected to the mixer; the outlet is connected to the TBM.

[0008] Optionally, an automatic weighing sensor may be installed at the bottom of the mixer.

[0009] Optionally, the automatic weighing sensing device includes a steel pad, a pressure sensor, and a fixing component; the steel pad is disposed at the bottom of the mixer, and the two are connected by the fixing component; the pressure sensor is disposed between the steel pad and the mixer.

[0010] Optionally, the mixer includes a housing, a stirring rod, a first driving member, and stirring blades; the stirring rod is disposed inside the housing; the stirring blades are multiple and spaced apart on the stirring rod; the output end of the first driving member is connected to the stirring rod.

[0011] Optionally, an interface communicating with the crusher is provided on the housing.

[0012] Optionally, the curing agent storage device includes a first curing agent storage tank and a second curing agent storage tank; the first curing agent storage tank is connected to the interior of the shell through a first pipeline; the second curing agent storage tank is connected to the interior of the shell through a second pipeline; the water storage tank is connected to the interior of the shell through a third pipeline; a first flow regulating valve and a first flow meter are provided on the first pipeline, the second pipeline and the third pipeline; the first flow regulating valve includes a first solenoid valve.

[0013] Optionally, the mortar tank is further equipped with a mortar inlet pump, a mortar inlet pipeline, a mortar outlet pump, and a mortar outlet pipeline; one end of the mortar inlet pipeline is connected to the mortar inlet, and the other end is connected to the inside of the housing; the mortar inlet pump is installed on the mortar tank, with its inlet end connected to the mortar inlet pipeline and its outlet end connected to the mortar inlet; one end of the mortar outlet pipeline is connected to the mortar outlet, and the other end is connected to the tunnel boring machine; the mortar inlet pump is installed on the mortar tank, with its inlet end connected to the mortar outlet and its outlet end connected to the mortar outlet pipeline; a second flow regulating valve and a second flow meter are installed on both the mortar inlet pipeline and the mortar outlet pipeline; the second flow regulating valve includes a second solenoid valve.

[0014] Optionally, a stirring device is also provided on the mortar tank; the stirring device includes a stirring blade and a second driving component; the second driving component is provided on the mortar tank, its output end is connected to one end of the stirring blade, and the other end of the stirring blade is provided inside the mortar tank.

[0015] Optionally, the shield tunneling muck synchronous grouting system further includes a first vehicle, a second vehicle, and a lifting drive; the mortar tank is mounted on the first vehicle; the crusher and the mixer are mounted on the second vehicle; and the lifting drive is connected to the secondary belt conveyor.

[0016] Optionally, the shield tunneling excavation grouting system further includes a main controller; the main controller includes a PLC controller and is mounted on the second vehicle; the screw conveyor, the main belt conveyor, the secondary belt conveyor, the lifting drive, the crusher, the pressure sensor, the first drive, the second drive, the first flow meter, the first solenoid valve, the second flow meter, the second solenoid valve, the grout inlet pump, and the grout outlet pump are all connected to the PLC controller.

[0017] The application of the technical solution of this utility model has at least the following beneficial effects:

[0018] This invention provides a synchronous grouting system for shield tunneling excavated soil, which solves the problems existing in traditional synchronous grouting preparation processes and has significant social and economic benefits. Specifically, this invention adopts a combined structure of a screw conveyor, a main belt conveyor, a secondary belt conveyor, a crusher, a mixer, a solidifying agent storage device, and a water storage tank. This enables continuous conveying, crushing, and mixing / solidifying of shield tunneling excavated soil into slurry, achieving simultaneous shield tunneling and slurry preparation. This greatly improves construction efficiency and eliminates the need for slurry preparation and transportation at a mixing plant, reducing construction costs. The prepared slurry is stored in a slurry tank for use in the next ring of shield tunneling. Furthermore, the excavated soil, slurry preparation, and grouting are all completed within the shield tunnel, requiring less land area, shortening slurry transportation distances, and reducing waiting time, thus greatly improving slurry quality and avoiding problems such as segregation and sedimentation caused by long-distance transportation from the mixing plant. In addition, this invention achieves in-situ resource utilization of shield tunneling excavated soil, with a simple process and is environmentally friendly.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of a shield tunneling excavation and soil synchronous grouting system in one of the embodiments (the black arrows in the figure indicate the direction of the shield tunneling);

[0022] Figure 2 This is a schematic diagram of the internal structure of a mixer;

[0023] Figure 3 This is a schematic diagram of the automatic weighing sensor device;

[0024] Among them, 1. Screw conveyor, 2. Main belt conveyor, 3. Secondary belt conveyor, 4. Crusher, 5. Mixer, 5.1. Mixing rod, 5.2. Mixing blade, 6. Curing agent storage device, 7. Mortar tank, 7.1. Inlet pump, 7.2. Outlet pump, 8. Automatic weighing sensor, 8.1. Steel pad, 8.2. Pressure sensor, 8.3. Fixture, 9. First vehicle, 10. Second vehicle, C. Vertical shaft. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0026] Example:

[0027] See Figures 1-3 A shield tunneling excavation grouting system includes a screw conveyor 1, a main belt conveyor 2, a secondary belt conveyor 3, a crusher 4, a mixer 5, a curing agent storage device 6, a water storage tank (not shown in the figure), and a mortar tank 7.

[0028] The screw conveyor 1 is connected to the muck discharge end of the tunnel boring machine (such as an earth pressure balance tunnel boring machine); the main belt conveyor 2 is connected to the end of the screw conveyor 1 away from the muck discharge end of the tunnel boring machine; the liftable secondary belt conveyor 3 is connected to the end of the main belt conveyor 2 away from the screw conveyor 1; the crusher 4 is connected to the end of the secondary belt conveyor 3 away from the main belt conveyor 2; the mixer 5 is connected below the crusher 4, and the crusher 4 is used to crush the muck into muck particles that meet the specifications for slurry preparation; the solidifying agent storage device 6 and the water storage tank are both connected to the mixer 5 to provide solidifying agent and water for the muck preparation; the mortar tank 7 is located between the mixer 5 and the tunnel boring machine, and the mortar tank 7 is provided with a mortar inlet and a mortar outlet; the mortar inlet is connected to the mixer 5; the mortar outlet is connected to the tunnel boring machine.

[0029] See Figure 1 An automatic weighing sensor 8 is installed at the bottom of the mixer 5. Specifically, there are four automatic weighing sensors 8, which are evenly distributed at the bottom of the mixer 5 to accurately monitor the changes in the weight of the slurry in real time until the weight of the slurry reaches the target value. At this time, the PLC controller controls the secondary belt conveyor 3 to rise and controls the first solenoid valve to close, that is, to stop the entry of slag, solidifying agent and water into the mixer 5.

[0030] See Figure 3 The automatic weighing sensor 8 includes a steel pad 8.1, a pressure sensor 8.2, and a fastener 8.3 (such as a bolt); the steel pad 8.1 is disposed at the bottom of the mixer 5 and the two are connected by the fastener 8.3; the pressure sensor 8.2 is disposed between the steel pad 8.1 and the mixer 5.

[0031] See Figure 1 and Figure 2 The mixer 5 includes a housing, a stirring rod 5.1, a first driving component (such as a motor, not shown in the figure), and stirring blades 5.2 (such as spiral blades); the stirring rod 5.1 is disposed inside the housing; there are multiple stirring blades 5.2, which are spaced apart on the stirring rod 5.1; the output end of the first driving component is connected to the stirring rod 5.1.

[0032] An interface communicating with the crusher 4 is provided on the shell to allow the crushed slag to flow into the mixer 5.

[0033] The curing agent storage device 6 is installed on the ground outside the shield tunnel, and includes a first curing agent storage tank and a second curing agent storage tank; the first curing agent storage tank is used to store a first curing agent; the second curing agent storage tank is used to store a second curing agent; the first curing agent storage tank is connected to the shell through a first pipeline; the second curing agent storage tank is connected to the shell through a second pipeline; the water storage tank is connected to the shell through a third pipeline; the first pipeline, the second pipeline and the third pipeline are all installed through a vertical shaft C; a first flow regulating valve (not shown in the figure) and a first flow meter (not shown in the figure) are installed on the first pipeline, the second pipeline and the third pipeline; the first flow regulating valve is a first solenoid valve.

[0034] The mortar tank 7 is also equipped with a grout inlet pump 7.1, a grout inlet pipeline, a grout outlet pump 7.2, and a grout outlet pipeline; one end of the grout inlet pipeline is connected to the grout inlet, and the other end is connected to the housing; the grout inlet pump 7.1 is installed on the mortar tank 7, with its inlet end connected to the grout inlet pipeline and its outlet end connected to the grout inlet; one end of the grout outlet pipeline is connected to the grout outlet, and the other end is connected to the tunnel boring machine; the grout inlet pump 7.1 is installed on the mortar tank 7, with its inlet end connected to the grout outlet and its outlet end connected to the grout outlet pipeline; a second flow regulating valve (not shown in the figure) and a second flow meter (not shown in the figure) are installed on both the grout inlet pipeline and the grout outlet pipeline; the second flow regulating valve includes a second solenoid valve.

[0035] A stirring device is also provided on the mortar tank 7; the stirring device includes a stirring blade and a second driving component (such as a motor); the second driving component is provided on the mortar tank 7, and its output end is connected to one end of the stirring blade, and the other end of the stirring blade is provided inside the mortar tank 7 for stirring the slurry and preventing the slurry from settling.

[0036] The shield tunnel slag synchronous grouting system also includes a first vehicle 9, a second vehicle 10, and a lifting drive component (such as a lifting cylinder, not shown in the figure); the mortar tank 7 is installed on the first vehicle 9; the crusher 4 and the mixer 5 are installed on the second vehicle 10; the fixed end of the lifting drive component is connected to the ground inside the shield tunnel, while the lifting end is connected to the secondary belt conveyor 3, used to drive the secondary belt conveyor 3 to lift and lower, so as to realize the docking and disengagement of the secondary belt conveyor 3 with the main belt conveyor 2.

[0037] The shield tunneling muck synchronous grouting system also includes a main controller (not shown in the figure); the main controller includes a PLC controller and is installed on the second trolley 10; the screw conveyor 1, the main belt conveyor 2, the secondary belt conveyor 3, the lifting drive, the crusher 4, the pressure sensor 8.2, the first drive, the second drive, the first flow meter, the first solenoid valve, the second flow meter, the second solenoid valve, the grout inlet pump 7.1, and the grout outlet pump 7.2 are all connected to the PLC controller.

[0038] The operation process of the shield tunneling excavation and soil synchronous grouting system is as follows:

[0039] Step 1: The operator controls the PLC controller to start the screw conveyor 1, the main belt conveyor 2, and drives the secondary belt conveyor 3 to descend to dock with the main belt conveyor 2 via the lifting drive component; the excavated soil generated by the earth pressure balance shield machine is transported to the crusher 4 through the screw conveyor 1, the main belt conveyor 2 and the secondary belt conveyor 3;

[0040] Step 2: The operator controls the PLC controller to start the crusher 4 to crush the slag into slag particles with a particle size that meets the specifications. After crushing, the slag enters the mixer 5. The operator controls the PLC controller to start the mixer 5 (specifically the first drive unit), the first flow meter, the first solenoid valve, and the automatic weighing sensor 8 (specifically the pressure sensor 8.2). The operator controls the amount of slag, solidifying agent, and water according to the conventional slurry mixing ratio until the weight of the slurry formed by mixing reaches the target value.

[0041] Step 3: The operator controls the PLC controller to start the grout pump 7.1 and the mixing device (specifically the second drive component) to transport the grout to the mortar tank 7 for storage. The mixing device in the mortar tank 7 agitates the grout to prevent sedimentation, so that it can be used during the next shield tunneling grouting.

[0042] Step 4: After the slurry preparation is completed, the operator controls the PLC controller to start the lifting drive to drive the secondary belt conveyor 3 to rise until it is separated from the main belt conveyor 2. The main belt conveyor 2 continues to transport the slag to the slag hopper of the battery truck and transport it to the slag discharge well.

[0043] During the next stage of shield tunneling grouting, the operator uses a PLC controller to start the grout pump 7.2, the second flow meter, and the second solenoid valve, so that the grout flows out to complete the grouting, and can adjust the grouting speed and flow rate.

[0044] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shield tunneling excavation and soil synchronous grouting system, characterized in that, Includes a screw conveyor (1), a main belt conveyor (2), a secondary belt conveyor (3), a crusher (4), a mixer (5), a curing agent storage device (6), a water storage tank, and a mortar tank (7); The screw conveyor (1) is connected to the slag discharge end of the tunnel boring machine; the main belt conveyor (2) is connected to the end of the screw conveyor (1) away from the slag discharge end of the tunnel boring machine; the liftable secondary belt conveyor (3) is connected to the end of the main belt conveyor (2) away from the screw conveyor (1); the crusher (4) is connected to the end of the secondary belt conveyor (3) away from the main belt conveyor (2); the mixer (5) is connected to the bottom of the crusher (4); the curing agent storage device (6) and the water storage tank are both connected to the mixer (5); the mortar tank (7) is located between the mixer (5) and the tunnel boring machine, and an inlet and an outlet are provided on the mortar tank (7); the inlet is connected to the mixer (5); the outlet is connected to the tunnel boring machine.

2. The shield tunneling muck synchronous grouting system according to claim 1, characterized in that, An automatic weighing sensor (8) is installed at the bottom of the mixer (5).

3. The shield tunneling muck synchronous grouting system according to claim 2, characterized in that, The automatic weighing sensor (8) includes a steel pad (8.1), a pressure sensor (8.2), and a fixing member (8.3); the steel pad (8.1) is located at the bottom of the mixer (5), and the two are connected by the fixing member (8.3); the pressure sensor (8.2) is located between the steel pad (8.1) and the mixer (5).

4. The shield tunneling muck synchronous grouting system according to claim 3, characterized in that, The mixer (5) includes a housing, a stirring rod (5.1), a first driving member, and stirring blades (5.2); the stirring rod (5.1) is disposed inside the housing; there are multiple stirring blades (5.2) and they are spaced apart on the stirring rod (5.1); the output end of the first driving member is connected to the stirring rod (5.1).

5. The shield tunneling muck synchronous grouting system according to claim 4, characterized in that, An interface communicating with the crusher (4) is provided on the housing.

6. The shield tunneling muck synchronous grouting system according to claim 4, characterized in that, The curing agent storage device (6) includes a first curing agent storage tank and a second curing agent storage tank; the first curing agent storage tank is connected to the inside of the shell through a first pipeline; the second curing agent storage tank is connected to the inside of the shell through a second pipeline; the water storage tank is connected to the inside of the shell through a third pipeline; a first flow regulating valve and a first flow meter are provided on the first pipeline, the second pipeline and the third pipeline; the first flow regulating valve includes a first solenoid valve.

7. The shield tunneling muck synchronous grouting system according to claim 6, characterized in that, The mortar tank (7) is also equipped with a grout pump (7.1), a grout inlet pipeline, a grout outlet pump (7.2), and a grout outlet pipeline; one end of the grout inlet pipeline is connected to the grout inlet, and the other end is connected to the shell; the grout pump (7.1) is installed on the mortar tank (7), with its inlet end connected to the grout inlet pipeline and its outlet end connected to the grout inlet; one end of the grout outlet pipeline is connected to the grout outlet, and the other end is connected to the tunnel boring machine; the grout pump (7.1) is installed on the mortar tank (7), with its inlet end connected to the grout outlet and its outlet end connected to the grout outlet pipeline; a second flow regulating valve and a second flow meter are installed on both the grout inlet pipeline and the grout outlet pipeline; the second flow regulating valve includes a second solenoid valve.

8. The shield tunneling muck synchronous grouting system according to claim 7, characterized in that, A stirring device is also provided on the mortar tank (7); the stirring device includes a stirring blade and a second driving component; the second driving component is provided on the mortar tank (7), its output end is connected to one end of the stirring blade, and the other end of the stirring blade is provided inside the mortar tank (7).

9. The shield tunneling muck synchronous grouting system according to claim 8, characterized in that, It also includes a first vehicle (9), a second vehicle (10) and a lifting drive; the mortar tank (7) is mounted on the first vehicle (9); the crusher (4) and the mixer (5) are mounted on the second vehicle (10); the lifting drive is connected to the secondary belt conveyor (3).

10. The shield tunneling muck synchronous grouting system according to claim 9, characterized in that, It also includes a main controller; the main controller includes a PLC controller and is installed on the second vehicle (10); the screw conveyor (1), the main belt conveyor (2), the secondary belt conveyor (3), the lifting drive, the crusher (4), the pressure sensor (8.2), the first drive, the second drive, the first flow meter, the first solenoid valve, the second flow meter, the second solenoid valve, the slurry pump (7.1), and the slurry pump (7.2) are all connected to the PLC controller.

Images