Device for simulating underwater synchronous grouting

Abstract

The utility model discloses a device for simulating underwater synchronous grouting in the field of tunnel engineering, which comprises a test box which is a rectangular box body with an opening at the top and is filled with water; the test piece mold is arranged in the test box; the grouting assembly comprises a closed slurry storage tank, a grouting pipe and a grouting device, the grouting pipe is connected out of the slurry storage tank, the end of the grouting pipe is arranged in the test box, the grouting pipe is connected with a synchronizing mechanism, the synchronizing mechanism enables the grouting pipe to move above the test piece mold, and the grouting device is connected with the slurry storage tank and provides grouting pressure for the slurry storage tank; the underwater synchronous grouting device has the advantages that the air compressor and the stepping motor are arranged to serve as power and a synchronizing mechanism for pressure grouting, an underwater synchronous grouting mode is restored, the change form of underwater grouting slurry along with a water body is visually reflected, and research on water dispersion resistance of the slurry is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, in particular to a device for simulating underwater synchronous grouting. Background Art

[0002] In recent years, shield tunnel construction often encounters water-rich environments such as high permeability strata, water-rich karst environments, and water-rich rock strata with developed fissures. After the ordinary synchronous grouting slurry enters the water-rich shield tail gap, the cementitious material particles are rapidly dispersed and spread under the action of the groundwater resistance and buoyancy in motion. Due to the loss of cementitious materials, the filling rate of the grouting ring in the shield tail gap is insufficient, resulting in local defects.

[0003] Therefore, it is necessary to optimize and improve the underwater grouting performance of the existing cement-based synchronous grouting slurry to ensure the water-resistance dispersion of the slurry after it is injected into the water-rich shield tail gap, and the slurry will not be stratified under the action of groundwater, that is, the slurry has good stability; at the same time, the cementitious material can be well bonded with the fine aggregate and will not be lost with the groundwater, that is, the slurry can be well gelled and form a stone body with higher strength.

[0004] At present, the research results on water-resistance test indicators and devices are mainly concentrated on the research of underwater non-dispersible concrete. Relatively speaking, there are fewer research results on the water-resistance of synchronous grouting slurry. There are obvious differences between the construction characteristics of synchronous grouting and underwater non-dispersible concrete. The applicability and coverage of underwater non-dispersible concrete indicators are questionable.

[0005] To this end, we propose a device for simulating underwater synchronous grouting. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the utility model provides a device for simulating underwater synchronous grouting.

[0007] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is:

[0008] A device for simulating underwater synchronous grouting, comprising: a test box, which is a rectangular box with an open top and is filled with water; a specimen mold, which is placed in the test box; a grouting assembly, which comprises a closed grouting tank, a grouting pipe and a grouting device, wherein the grouting pipe is connected to the grouting tank and the end thereof is placed in the test box, and a synchronization mechanism is connected to the grouting pipe, which enables the grouting pipe to move above the specimen mold at a speed matching the grouting speed along the length direction of the specimen mold, and the grouting device is connected to the grouting tank to provide grouting pressure for the grouting tank.

[0009] A test box is set up and filled with water. The specimen mold is placed in the water-filled test box to simulate the underwater environment. Grouting is performed on the specimen mold through a grouting device, a slurry storage tank and a grouting pipe. The grouting pipe is driven by a synchronization mechanism to move at a speed matching the grouting speed to grout the specimen mold. This can effectively simulate the underwater synchronous grouting scenario and intuitively reflect the change in form of the slurry with the water body when the synchronous grouting slurry of the shield tunnel enters the water-rich shield tail gap. The grouting mode of synchronous grouting is synchronously restored through the synchronization mechanism and the grouting device, which greatly reduces the error of the actual operation.

[0010] It is further defined that the synchronization mechanism includes a fixed base plate, a sliding seat, a sliding motor, a sliding screw and a slider; the sliding seat is arranged on the fixed base plate, the sliding motor is horizontally installed on the sliding seat, one end of the sliding screw is fixedly connected to the output shaft of the sliding motor, the slider is threadedly connected to the sliding screw, and the bottom of the slider is recessed with an anti-rotation groove, the inner diameter of the anti-rotation groove matches the width of the sliding seat, and the grouting pipe is fixed on the slider; the sliding screw is driven to rotate by the sliding motor, the sliding screw rotates, and the anti-rotation groove at the bottom of the slider is clamped at both ends of the sliding seat, so that the slider slides on the sliding screw to realize the movement of the grouting pipe, and the use of a stepper motor can make the control accuracy higher and reduce errors.

[0011] It is further defined that the grouting device includes an air compressor and an air inlet pipe, one end of the air inlet pipe is connected to the output end of the air compressor, and the other end is connected to the slurry storage tank; the slurry storage tank is pressurized by the air compressor to achieve pressurized grouting of the slurry, thereby restoring the pressurized grouting mode of synchronous grouting.

[0012] It is further defined that an air pressure valve is connected to the air inlet pipe; setting the air pressure valve can adjust the grouting speed by adjusting the air pressure valve, which is more convenient.

[0013] It is further defined that a slurry stop valve is connected to the grouting pipe; the slurry stop valve is provided to close the grouting pipe to prevent the slurry from leaking from the grouting pipe after the grouting is completed.

[0014] It is further defined that a push plate is provided in the slurry storage tank, the outer diameter of the push plate matches the inner diameter of the slurry storage tank, a guide rod is vertically provided on the top of the push plate, the guide rod passes through the top plate of the slurry storage tank, and the air inlet pipe is connected to the slurry storage tank above the push plate; by setting the push plate, when the air compressor inflates the slurry storage tank, the air inlet pipe is located on the slurry storage tank above the push plate, then the compressed air will push the push plate downward during the inflation process to push the slurry to complete the grouting, and the guide rod is set to pass through the top plate of the slurry storage tank so that the push plate will not be offset during the downward movement.

[0015] The beneficial effect of the utility model is that by arranging an air compressor and a stepper motor as the power and synchronization mechanism of pressurized grouting, the underwater synchronous grouting mode is restored, which intuitively reflects the change of the morphology of the underwater grouting slurry with the water body, and is convenient for studying the water-resistance dispersion of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a right side view of a partial perspective state of the utility model.

[0018] The symbols of the components are as follows:

[0019] Test box 1, specimen mold 2, grouting assembly 3, slurry storage tank 31, slurry pushing plate 311, guide rod 312, grouting pipe 32, slurry stop valve 321, air compressor 33, air inlet pipe 34, air pressure valve 35, synchronization mechanism 4, fixed bottom plate 41, sliding seat 42, sliding motor 43, sliding screw 44, slider 45. DETAILED DESCRIPTION

[0020] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0021] Example:

[0022] like Figure 1 and Figure 2As shown, a device for simulating underwater synchronous grouting includes a test box 1, a specimen mold 2, a grouting assembly 3 and a synchronization mechanism 4; the test box 1 is a rectangular box with an open top, and the test box 1 is filled with water; the specimen mold 2 is placed in the test box 1; the grouting assembly 3 includes a closed grouting tank 31, a grouting pipe 32 and a grouting device, the grouting pipe 32 is connected from the grouting tank 31, and the end is placed in the test box 1, and the grouting pipe 32 is connected to a grouting stop valve 321; the synchronization mechanism 4 enables the grouting pipe 32 to move above the specimen mold 2 along the length direction of the specimen mold 2 at a speed matching the grouting speed, the grouting device is connected to the grouting tank 31, and grouting pressure is provided for the grouting tank 31, and the grouting device includes an air compressor 33 and an air inlet pipe 34, one end of the air inlet pipe 34 is connected to the output end of the air compressor 33, and the other end is connected to the grouting tank 31 ; An air pressure valve 35 is connected to the air inlet pipe 34; a push plate 311 is provided in the slurry storage tank 31, the outer diameter of the push plate 311 matches the inner diameter of the slurry storage tank 31, a guide rod 312 is vertically provided on the top of the push plate 311, the guide rod 312 passes through the top plate of the slurry storage tank 31, and the air inlet pipe 34 is connected to the slurry storage tank 31 above the push plate 311; the synchronization mechanism 4 includes a fixed base plate 41, a sliding seat 42, a sliding motor 43, a sliding screw 44 and a slider 45; the sliding seat 42 is provided on the fixed base plate 41, the sliding motor 43 is horizontally installed on the sliding seat 42, one end of the sliding screw 44 is fixedly connected to the output shaft of the sliding motor 43, the slider 45 is threadedly connected to the sliding screw 44, the bottom of the slider 45 is recessed with an anti-rotation groove, the inner diameter of the anti-rotation groove matches the width of the sliding seat 42, and the grouting pipe 32 is fixed on the slider 45.

[0023] By setting up a test box 1, the test box 1 is filled with water, and the test piece mold 2 is placed in the test box 1 filled with water to simulate the underwater environment. The test piece mold 2 is grouting through the grouting device, the slurry storage tank 31 and the grouting pipe 32. The grouting pipe 32 is driven by the synchronization mechanism 4 to move at a speed matching the grouting speed to grout the test piece mold 2, which can effectively simulate the underwater synchronous grouting scene, and can intuitively reflect that the slurry changes with the water body when the synchronous grouting slurry of the shield tunnel enters the water-rich shield tail gap. The grouting mode of synchronous grouting is realized by the synchronization mechanism 4 and the grouting device, which greatly reduces the error of the operation; the sliding motor 43 drives the sliding screw 44 to rotate, and the sliding screw 44 rotates, and the anti-rotation grooves at the bottom of the slider 45 are clamped at both ends of the sliding seat 42, so that the slider 45 slides on the sliding screw 44 The movement of the grouting pipe 32 is realized by motion. The use of a stepper motor can make the control accuracy higher and reduce the error. The air compressor 33 is used to pressurize the slurry storage tank 31 to realize the pressure injection of the slurry, and the pressurized grouting mode of synchronous grouting is restored. The air pressure valve 35 is set to adjust the grouting speed by adjusting the air pressure valve 35, which is more convenient. The slurry stop valve 321 is set to close the grouting pipe 32 to prevent the slurry from leaking from the grouting pipe 32 after the grouting is completed. By setting a slurry pusher plate 311, when the air compressor 33 inflates the slurry storage tank 31, the air inlet pipe 34 is located on the slurry storage tank 31 above the slurry pusher plate 311. The compressed air will push the slurry pusher plate 311 downward during the inflation process to push the slurry to complete the grouting. The guide rod 312 is set to pass through the top plate of the slurry storage tank 31 so that the slurry pusher plate 311 will not deviate during the downward movement.

Claims

1. A device for simulating underwater synchronous grouting, characterized in that: include: The test box (1) is a rectangular box with an open top, and the test box (1) is filled with water; A test piece mold (2) is placed in the test box (1); The grouting assembly (3) comprises a closed grouting tank (31), a grouting pipe (32) and a grouting device. The grouting pipe (32) is connected to the grouting tank (31) and its end is placed in the test box (1). The grouting pipe (32) is connected to a synchronization mechanism (4). The synchronization mechanism (4) enables the grouting pipe (32) to move above the specimen mold (2) along the length direction of the specimen mold (2) at a speed matching the grouting speed. The grouting device is connected to the grouting tank (31) and provides grouting pressure for the grouting tank (31).

2. The device for simulating underwater synchronous grouting according to claim 1, characterized in that: The synchronization mechanism (4) comprises a fixed base plate (41), a sliding seat (42), a sliding motor (43), a sliding screw (44) and a sliding block (45); the sliding seat (42) is arranged on the fixed base plate (41), the sliding motor (43) is horizontally installed on the sliding seat (42), one end of the sliding screw (44) is fixedly connected to the output shaft of the sliding motor (43), the sliding block (45) is threadedly connected to the sliding screw (44), an anti-rotation groove is recessed at the bottom of the sliding block (45), the inner diameter of the anti-rotation groove matches the width of the sliding seat (42), and the grouting pipe (32) is fixed on the sliding block (45).

3. The device for simulating underwater synchronous grouting according to claim 1, characterized in that: The grouting device comprises an air compressor (33) and an air inlet pipe (34); one end of the air inlet pipe (34) is connected to the output end of the air compressor (33), and the other end is communicated with the slurry storage tank (31).

4. The device for simulating underwater synchronous grouting according to claim 3, characterized in that: The air inlet pipe (34) is connected to an air pressure valve (35).

5. The device for simulating underwater synchronous grouting according to claim 1, characterized in that: The grouting pipe (32) is connected with a grouting stop valve (321).

6. The device for simulating underwater synchronous grouting according to claim 3, characterized in that: A pusher plate (311) is provided in the pulp storage tank (31), the outer diameter of the pusher plate (311) matches the inner diameter of the pulp storage tank (31), a guide rod (312) is vertically provided on the top of the pusher plate (311), the guide rod (312) passes through the top plate of the pulp storage tank (31), and the air inlet pipe (34) is connected to the pulp storage tank (31) above the pusher plate (311).

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