A shield pile cutting test device

Abstract

The present invention discloses a shield pile cutting test device, including a base, one side of the base is fixedly connected to a test soil box, a crushed pile column is buried in the test soil box, a jacking device and a shield body are arranged on the other side of the base, the shield body includes a shield head and a spiral discharger, an burying device is arranged on the upper side of the test soil box, the burying device at least includes a turntable, the turntable rotates to release conical stones at intervals, and the turntable is vertically raised to cooperate with the soil-casting device to form spirally ascending conical stones in the test soil box, and one side of the conical stone is fixedly connected to a steel bar. The present invention buries conical stones in different azimuth angles in the test soil, the spiral discharger discharges the slag after cutting, and the influence of irregular crushed stone and steel bars on slag discharge after the waste pile is crushed is tested, which is convenient for timely improvement of construction technology and is conducive to solving the slag discharge failure of specific soil and pile column cutting.

Description

Technical Field

[0001] The invention relates to the technical field of shield machine pile cutting and slag removal, and in particular to a shield machine pile cutting test device. Background Art

[0002] Shield construction is an important means of subway tunnel construction. It is inevitable to cross some obstacles during the construction process, especially reinforced concrete piles. Among the advanced technologies, water jet cutting is used on the shield cutter to cut piles. On the one hand, factors such as the size of the steel pile cutting, the number of segments, the direction of the steel bars, and the type of mud injection technology used can affect the slag discharge of the chopped stones through the shield machine. The existing technology does not have a comprehensive evaluation device for the abnormal slag discharge test here. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings existing in the prior art and to propose a shield pile cutting test device, thereby solving the problems existing in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A shield pile cutting test device comprises a base, one side of the base is fixedly connected to a test soil box, a crushing pile column is buried in the test soil box, a jacking device and a shield body are arranged on the other side of the base, the shield body comprises a shield head and a spiral discharger, an burying device is arranged on the upper side of the test soil box, the burying device comprises at least a turntable, the turntable rotates to release conical stones at intervals, and the turntable is vertically raised to cooperate with the soil-dropping device to form spirally ascending conical stones in the test soil box, and one side of the conical stones is fixedly connected to a steel bar.

[0006] Preferably, the burying device also includes a crossbeam, which is horizontally slidably connected to a sliding seat, one side of the crossbeam is fixedly connected to a horizontal hydraulic rod, the horizontal hydraulic rod is fixedly connected to the sliding seat, the upper side of the sliding seat is fixedly connected to a vertical cylinder, the telescopic end of the vertical cylinder is fixedly connected to a support ring, the support ring is rotatably connected to a turntable, the bottom of the turntable is fixedly connected to a hanging pipe by two inclined rods, and a plurality of conical stones are stacked in the hanging pipe.

[0007] Preferably, a vertical through groove is provided on the side of the hanging pipe, and the steel bar passes through the vertical through groove;

[0008] A support member is arranged inside the hanging pipe, and the support member serves to support or discharge the conical stone;

[0009] An intermittent inserting device is arranged outside the hanging pipe, and the intermittent inserting device inserts the steel bar into the layered filled test soil.

[0010] Preferably, the intermittent lower insertion device includes a lower insertion cylinder, the lower end of the telescopic rod of the lower insertion cylinder is fixedly connected to the arc plate, a one-way hinge groove is arranged at the bottom of one end of the arc plate, the lower push plate is rotatably connected in the one-way hinge groove, and a return torsion spring is arranged on the rotating shaft of the lower push plate.

[0011] Preferably, the support member includes an upper air cushion and a lower air cushion, the lower air cushion is located at the lower end of the inner wall of the hanging tube, the upper air cushion is fixedly connected to the inner wall of the hanging tube above the lower air cushion, the outer wall of the hanging tube is fixedly connected to the air storage pipe, the air storage pipe is slidably connected to a piston plate, the telescopic rod of the lower oil cylinder slides through the air storage pipe and is fixedly connected to the piston plate, the piston plate divides the air storage pipe into an upper air cavity and a lower air cavity, the upper air cavity is connected to the upper air cushion through a pipe, and the lower air cavity is connected to the lower air cushion through a pipe.

[0012] Preferably, two rotating rods are connected at two sides of the outside of the hanging pipe for relative rotation, and the lower end of each rotating rod is fixedly connected to a soil-moving plate.

[0013] Preferably, the outside of the hanging tube is vertically slidably connected to an arc ring, the bottom of the arc ring is fixedly connected to a round tube, the round tube is slidably connected to the rotating rod and a supporting spring is fixedly connected therebetween, the upper end of the rotating rod is rotatably connected to a ball, a spiral groove is provided on the inner wall of the round tube, the ball is slidably provided in the spiral groove, one side of the arc plate is fixedly connected to a pull rod, the upper end of the pull rod is fixedly connected to a side rod, and the side rod can press against the upper side of the arc ring.

[0014] Preferably, both sides of the support ring are fixedly connected to suspension rods, and the bottom of the suspension rod is fixedly connected to a pressure plate.

[0015] The advantages of the present invention are as follows: a shield pile cutting test device provided by the present invention is vertically elevated by rotating a turntable. When filling the soil layer by layer, conical stones are placed in an interval rotation. Steel bars are arranged on the conical stones. The steel bars are bent or straight and buried in the test soil at different azimuth angles. A spiral discharger discharges the cut slag. The influence of irregular crushed stone and steel bars on the slag discharge after the waste pile is crushed is tested, which is convenient for timely improvement of the construction process and is beneficial for solving the slag discharge failure of specific soil and pile column cutting.

[0016] The present invention pushes the arc ring downward through the pull rod and the side rod on one side of the arc plate, and the arc ring descends with the round tube. The spiral groove and the ball bearings cause the two rotating rods to rotate, and the arc plates under the two rotating rods rotate close to each other, so that the loose soil is gathered and supported to the bottom of the conical stone, so as to avoid the conical stone sinking more than the steel bar due to the large volume during subsequent soil compaction, and avoid affecting the orientation of the steel bar relative to the conical stone. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a basic structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the embedding device of the present invention;

[0019] Figure 3 It is a schematic structural diagram of the intermittent insertion device of the present invention;

[0020] Figure 4 It is a schematic diagram of the principle of placing the conical stone of the present invention;

[0021] Figure 5 It is a schematic diagram of the internal structure of the hanging pipe of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example 1

[0023] like Figures 1 to 5 The present invention provides a shield pile cutting test device, comprising a base 1, one side of the base 1 is fixedly connected to a test soil box 2, corresponding sensors and strain gauges are buried in the test soil box 2 according to test requirements, a crushing pile column is buried in the test soil box 2, and a jacking device 3 and a shield body 4 are arranged on the other side of the base 1. The jacking device 3 is a hydraulic cylinder, which provides power for the shield body 4 to enter the test soil box 2. The shield body 4 includes a shield head and a spiral discharger. An burying device 5 is arranged on the upper side of the test soil box 2, and the burying device 5 at least includes a turntable 51, and the turntable 51 The turntable 51 is driven to rotate by conventional power, such as a hydraulic turntable, an electric drive, etc., and the conical stones 10 are dropped at intervals during rotation. The turntable 51 is vertically raised to cooperate with the soil-dropping device to form a spirally ascending distribution of conical stones 10 in the test soil box 2, forming dispersed truncated pile column fragments formed after the high-pressure water jet of the shield cutter head. The soil-dropping device is one of the conventional conveying devices such as a crane, an elevator, a conveyor belt, etc. One side of the conical stone 10 is fixedly connected to the steel bar 20, and the conical stone 10 is a cast sample or a broken piece of abandoned building.

[0024] The present invention rotates the turntable 51 in coordination with the vertical elevation. When filling the soil layer by layer, the conical stones 10 are rotated at intervals. The conical stones 10 are provided with steel bars 20. The steel bars 20 are bent or straight and buried in different orientations in the test soil. The spiral discharger discharges the cut slag soil. The influence of irregular crushed stone steel bars on the slag discharge after the waste pile is broken is tested, which is convenient for timely improvement of the construction process and is beneficial to solving the slag discharge failure of specific soil and pile cutting. Example 2

[0025] like Figures 1 to 5The embedding device 5 also includes a crossbeam 52, which is horizontally slidably connected to a slide 53, one side of the crossbeam 52 is fixedly connected to a horizontal hydraulic rod 54, the horizontal hydraulic rod 54 is fixedly connected to the slide 53, the upper side of the slide 53 is fixedly connected to a vertical oil cylinder 55, the telescopic end of the vertical oil cylinder 55 is fixedly connected to a support ring 56, both sides of the support ring 56 are fixedly connected to a suspension rod 561, the bottom of the suspension rod 561 is fixedly connected to a pressure plate 562, the support ring 56 is rotatably connected to a turntable 51, the bottom of the turntable 51 is fixedly connected to a suspension pipe 57 through two oblique rods, a plurality of conical stones 10 are stacked in the suspension pipe 57, a vertical through groove 58 is arranged on the side of the suspension pipe 57, the steel bar 20 passes through the vertical through groove 58, and the bent part of the steel bar 20 is located outside the suspension pipe 57;

[0026] A support member is provided in the hanging pipe 57, and the support member serves to support or discharge the conical stone 10;

[0027] An intermittent inserting device 6 is arranged outside the hanging pipe 57, and the intermittent inserting device 6 inserts the reinforcement member 20 into the test soil filled in layers.

[0028] In this embodiment, the support member is selected from conventional structures, such as hydraulic support rods or electric warehouse doors, and the intermittent insertion device 6 is selected from conventional structures such as pneumatic or hydraulic push rods. On the one hand, when the hanging tube 57 rotates at the first angle, the support member loses support, and part of the conical stone 10 is discharged from the hanging tube 57 and buried in conjunction with the backfill. At this time, the conical stone 10 is large in volume and is easy to penetrate into the soil when pressing the soil. The conical stone 10-reinforcement member 20 remains inclined upward. At the next angle, the hanging tube 57 rises to a height with the backfill, and the hanging tube 57 rotates an angle. At this time, while cooperating with the conical stone 10, the intermittent insertion device 6 squeezes the reinforcement member 20. The reinforcement member 20 is in the shape of a thin rod and is easy to be pressed into the soil. The conical stone 10 is blocked on the surface of the soil due to its large volume. In the subsequent backfill, the reinforcement member 20 is inverted. Through the filling method of the present invention, obstacles of various angles and heights are buried in the test soil, which is conducive to solving specific soil and pile column cutting and slag discharge failures. Example 3

[0029] like Figures 2 to 5 The intermittent lower insertion device 6 includes a lower insertion cylinder 61, the lower end of the telescopic rod of the lower insertion cylinder 61 is fixedly connected to the arc plate 62, a one-way hinge groove 63 is arranged at the bottom of one end of the arc plate 62, the one-way hinge groove 63 is rotatably connected to the lower push plate 64, and the rotating shaft of the lower push plate 64 is provided with a reset torsion spring, such as Figure 5 As shown, when the conical stone 10 and the steel bar 20 fall, the steel bar 20 pushes the push plate 64 to rotate and the steel bar 20 is located below the push plate 64. The lower oil cylinder 61 then pushes the push plate 64 to press the steel bar 20 into the loose soil after filling. Then, the lower oil cylinder 61 is reset to compact the soil in the test soil box 2. Example 4

[0030] like Figures 3 to 5 The supporting member includes an upper air cushion 71 and a lower air cushion 72. The lower air cushion 72 is located at the lower end of the inner wall of the hanging tube 57. The upper air cushion 71 is fixedly connected to the inner wall of the hanging tube 57 above the lower air cushion 72. The outer wall of the hanging tube 57 is fixedly connected to the air storage pipe 73. The air storage pipe 73 is slidably connected to the piston plate 74. The telescopic rod of the lower plug cylinder 61 slides through the air storage pipe 73 and is fixedly connected to the piston plate 74. The piston plate 74 divides the air storage pipe 73 into an upper air cavity 75 and a lower air cavity 76. The upper air cavity 75 is connected to the upper air cushion 71 through a pipeline, and the lower air cavity 76 is connected to the lower air cushion 72 through a pipeline.

[0031] In order to overcome the inconvenience of using the support member in Example 2, such as multiple conical stones 10 falling at one time after the electric warehouse door is opened, in Example 4, the lower plug cylinder 61 moves upward, the lower air cavity 76 is expanded through the communicating vessel principle, the lower air cushion 72 contracts and loses its supporting effect on the lowest conical stone 10, and the conical stone 10 falls to the surface of the soil and is subsequently covered and compacted, while the upper air cushion 71 expands accordingly to increase the supporting force for the second-to-last conical stone 10, so only one conical stone 10 will fall; when the lower plug cylinder 61 pushes downward through the lower push plate 64, although the lower air cushion 72 expands and becomes larger, the lower push plate 64 The downward thrust causes the conical stone 10 and the steel bar 20 to be inserted into the loose soil (uncompacted slag) at an angle, and the expanded lower air cushion 72 intercepts the penultimate conical stone 10, and further expansion can resist the inertia of the multiple conical stones 10 above. Subsequently, when the lower push plate 64 is reset upward, due to its one-way avoidance structure, the lower push plate 64 rotates and avoids from below the steel bar 20 to above the steel bar 20. By adopting the support member of this embodiment, the conical stone 10 can be placed in accordance with the gap, and the conical stone 10 and the steel bar 20 can be buried in the soil in different postures, thereby meeting the diverse needs of the test. Example 5

[0032] like Figures 3 to 5 The two sides of the outside of the hanging tube 57 are relatively rotatably connected to two rotating rods 8, and the lower end of each rotating rod 8 is fixedly connected to the earthmoving plate 81. The outside of the hanging tube 57 is vertically slidably connected to the arc ring 82, and the bottom of the arc ring 82 is fixedly connected to the round tube 83. The round tube 83 is slidably connected to the rotating rod 8 and a supporting spring 84 is fixedly connected therebetween. The upper end of the rotating rod 8 is rotatably connected to the ball 85, and a spiral groove 86 is provided on the inner wall of the round tube 83. The ball 85 is slidably provided in the spiral groove 86. A pull rod 87 is fixedly connected to one side of the arc plate 62, and the upper end of the pull rod 87 is fixedly connected to the side rod 88, and the side rod 88 can press against the upper side of the arc ring 82.

[0033] In this embodiment, when the steel bar 20 is inserted into the soil, the pull rod 87 and the side rod 88 on one side of the arc plate 62 push the arc ring 82 downward, and the arc ring 82 descends with the round tube 83. The spiral groove 86 and the ball 85 cause the two rotating rods 8 to rotate, and the arc plates 62 under the two rotating rods 8 rotate close to each other, gathering and supporting the loose soil to the bottom of the conical stone 10, avoiding the conical stone 10 from sinking more than the steel bar 2 due to its large volume during subsequent soil compaction, and avoiding affecting the orientation of the steel bar 20 relative to the conical stone 10.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shield pile cutting test device, comprising a base (1), one side of the base (1) is fixedly connected to a test soil box (2), a crushing pile column is buried in the test soil box (2), and the other side of the base (1) is provided with a jacking device (3) and a shield body (4), the shield body (4) includes a shield head and a spiral discharger, characterized in that: An embedding device (5) is arranged on the upper side of the test soil box (2), and the embedding device (5) comprises at least a turntable (51). The turntable (51) rotates to drop conical stones (10) at intervals, and the turntable (51) rises vertically to cooperate with the soil dropping device to form spirally ascending conical stones (10) in the test soil box (2), and one side of the conical stones (10) is fixedly connected to a steel bar (20).

2. A shield pile cutting test device according to claim 1, characterized in that: The embedding device (5) further comprises a crossbeam (52), the crossbeam (52) being horizontally slidably connected to a slide seat (53), one side of the crossbeam (52) being fixedly connected to a horizontal hydraulic rod (54), the horizontal hydraulic rod (54) being fixedly connected to the slide seat (53), the upper side of the slide seat (53) being fixedly connected to a vertical oil cylinder (55), the telescopic end of the vertical oil cylinder (55) being fixedly connected to a support ring (56), the support ring (56) being rotatably connected to a turntable (51), the bottom of the turntable (51) being fixedly connected to a hanging pipe (57) via two inclined rods, and a plurality of conical stones (10) being stacked in the hanging pipe (57).

3. A shield pile cutting test device according to claim 2, characterized in that: A vertical through slot (58) is provided on the side of the hanging pipe (57), and the steel bar (20) passes through the vertical through slot (58); A support member is disposed inside the hanging pipe (57), and the support member serves to support or discharge the conical stone (10); An intermittent inserting device (6) is arranged outside the hanging pipe (57), and the intermittent inserting device (6) inserts the steel bar (20) into the layered test soil.

4. A shield pile cutting test device according to claim 3, characterized in that: The intermittent lower insertion device (6) comprises a lower insertion cylinder (61), the lower end of the telescopic rod of the lower insertion cylinder (61) is fixedly connected to the arc plate (62), a one-way hinge groove (63) is provided at the bottom of one end of the arc plate (62), a lower push plate (64) is rotatably connected in the one-way hinge groove (63), and a return torsion spring is provided on the rotation axis of the lower push plate (64).

5. A shield pile cutting test device according to claim 4, characterized in that: The support member comprises an upper air cushion (71) and a lower air cushion (72), the lower air cushion (72) being located at the lower end of the inner wall of the hanging tube (57), the upper air cushion (71) being fixedly connected to the inner wall of the hanging tube (57) above the lower air cushion (72), the outer wall of the hanging tube (57) being fixedly connected to the air storage pipe (73), the air storage pipe (73) being slidably connected to a piston plate (74), the telescopic rod of the lower plug-in oil cylinder (61) slidably penetrates the air storage pipe (73) and is fixedly connected to the piston plate (74), the piston plate (74) dividing the air storage pipe (73) into an upper air cavity (75) and a lower air cavity (76), the upper air cavity (75) being connected to the upper air cushion (71) through a pipeline, and the lower air cavity (76) being connected to the lower air cushion (72) through a pipeline.

6. A shield pile cutting test device according to claim 4, characterized in that: The two sides of the outside of the hanging pipe (57) are connected to two rotating rods (8) for relative rotation, and the lower end of each rotating rod (8) is fixedly connected to a soil-moving plate (81).

7. A shield pile cutting test device according to claim 6, characterized in that: The outside of the hanging tube (57) is vertically slidably connected to the arc ring (82), the bottom of the arc ring (82) is fixedly connected to the round tube (83), the round tube (83) is slidably connected to the rotating rod (8) and a support spring (84) is fixedly connected therebetween, the upper end of the rotating rod (8) is rotatably connected to the ball (85), the inner wall of the round tube (83) is provided with a spiral groove (86), the ball (85) is slidably provided in the spiral groove (86), one side of the arc plate (62) is fixedly connected to the pull rod (87), the upper end of the pull rod (87) is fixedly connected to the side rod (88), and the side rod (88) can press against the upper side of the arc ring (82).

8. A shield pile cutting test device according to claim 2, characterized in that: Both sides of the support ring (56) are fixedly connected to the suspension rod (561), and the bottom of the suspension rod (561) is fixedly connected to the pressure plate (562).

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