A test device for shield spiral unearthing

Abstract

The present application relates to the technical field of shield machine deslagging, and discloses a test device for shield spiral unearthing, which comprises a test soil bin, a shield cutter head and a spiral unearthing assembly, the shield cutter head digs the test soil layer in the test soil bin through horizontal feeding, and the spiral unearthing assembly is used for conveying the excavated spoil; the test device further comprises a plurality of filling bags, a rolling assembly and a plurality of emitters, the filling bags are buried on the test soil layer, the filling bags are filled with obstacles, the rolling assembly comprises a rolling cylinder body which is rolling connected in the test soil bin, the emitting port of the emitter is opposite to the emitting port, the emitters are connected with steel bars, and the center lines of the steel bars all point to the center line of the rolling cylinder body. The present application can truly reflect the actual complex geological conditions, is convenient for studying the soil pressure change law of the soil body particles of different solidified soil bodies during the soil bin discharging process, and makes an important contribution to the improvement scheme for the faults occurring in the actual desilting process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield machine slag discharge, and particularly relates to a test device for shield spiral unearthing. BACKGROUND

[0002] At present, the research on slag improvement mainly includes field research and indoor model test research. The construction unit usually determines the type and addition amount of the improvement agent through groping and experience for slag improvement on the construction site, and the improvement standard takes "no cake formation and easy flow" as the index. However, there is a lack of research and quantitative analysis on the adaptability of the improvement agent. Therefore, the model experimental device is usually used for research and analysis.

[0003] Compared with the field research, the model test can better study the stratum adaptability of the improvement agent, and can quantify the influence of the addition amount of the improvement agent on the improvement effect of the slag. The existing shield slag improvement model test device mainly adopts manual mixing of the slag, uses the basic simulated shield cutter for excavation experiment, and relies on the unearthing device to discharge the slag after the excavation opening. The soil pressure sensor is used to study the soil pressure change rule of the solidified soil particles in the soil bin discharge process, and the flowability of the improved slag is analyzed.

[0004] However, in reality, when the shield cutter cuts the waste pile foundation, a large amount of concrete blocks and waste steel bars will be mixed in the slag. The obstacles will be discharged at different angles by the spiral unearthing device, and the problems of jamming of the spiral unearthing device and slag discharge obstacles are prone to occur. The existing slag preparation does not consider the setting of the obstacles, so that the whole model test cannot truly reflect the actual working condition, cannot truly simulate the influence of the slag carrying the obstacles on the spiral unearthing device, and cannot make an effective improvement scheme for the faults such as jamming of the spiral unearthing device and slag discharge obstacles in the actual soil discharge process. SUMMARY

[0005] The present application provides a test device for shield spiral unearthing, which can truly reflect the actual complex geological working condition, is convenient for studying the soil pressure change rule of the different solidified soil particles in the soil bin discharge process, and makes an important contribution to the improvement scheme for the faults in the actual soil discharge process.

[0006] The application provides a test device for shield spiral excavation, which comprises a test soil bin, a shield cutter head and a spiral excavation assembly. The shield cutter head is used to excavate the test soil layer in the test soil bin through horizontal feeding. The spiral excavation assembly is used to transport the excavated muck. The test device further comprises a plurality of filling bags, a rolling assembly and a plurality of emitters. The filling bags are sequentially and spacedly filled in the test soil layer of the test soil bin. The filling bags are filled with obstacles. The rolling assembly comprises a rolling cylinder which is rollingly connected to the test soil bin so as to roll along the length direction of the wall of the test soil bin. The rolling cylinder is located on the upper surface of the test soil layer. The cylinder wall of the rolling cylinder is provided with a plurality of emission ports. The emitters are connected to the inner wall of the rolling cylinder. Each emitter is located close to the corresponding emission port. The emission port of the emitter is opposite to the emission port. The emitters are connected with steel bars. The center lines of the steel bars are directed to the center line of the rolling cylinder so that the emitters emit the steel bars from the corresponding emission ports.

[0007] Preferably, the shield cutter head is arranged on one of the width side walls of the test soil bin. The spiral excavation assembly is connected to the shield cutter head. The spiral excavation assembly comprises a shell and a hollow spiral shaft. The hollow spiral shaft is rotatably connected to the shell. A plurality of reserved holes are arranged on the outer side of the shell. Soil pressure sensors are fixedly connected in the reserved holes. The excavated muck is transported by the hollow spiral shaft.

[0008] Preferably, a guide base is connected to the bottom of the shield cutter head. The guide base is fixedly connected to the test soil bin. An opening is arranged on the side wall of the test soil bin close to the shield cutter head. The shield cutter head is used to feed horizontally into the test soil bin from the opening on the guide base.

[0009] Preferably, one end of the shell is fixedly connected to a soil collecting bin. One end of the hollow spiral shaft is fixedly connected to a crushing rod. The crushing rod is located in the soil collecting bin.

[0010] Preferably, the plurality of reserved holes are spirally and staggeredly arranged on the outer side of the shell.

[0011] Preferably, a plurality of emitters are arranged in the rolling cylinder.

[0012] Preferably, the emitter comprises a support plate, a first sliding block, a force storage spring, a mounting sleeve, a limiting rod, a shifting rod and a first spring. The support plate is fixedly connected to the inner wall of the rolling cylinder at the corresponding emission port. A first sliding groove is arranged on the support plate along the length direction of the support plate. The first sliding block is slidingly connected to the first sliding groove. The force storage spring is arranged in the first sliding groove and one end of the force storage spring is fixedly connected to the first sliding block. The first mounting sleeve is fixedly connected to the sliding block. A sliding hole is arranged in the bottom of the first sliding groove. The limiting rod is slidingly connected to the sliding hole. A limiting hole is arranged on the side of the first sliding block which contacts the bottom of the first sliding groove. One end of the limiting rod is arranged corresponding to the limiting hole. The shifting rod is fixedly connected to the other end of the limiting rod. The first spring is fixedly connected between the shifting rod and the outer wall of the support plate. The shifting rod is driven to displace by a shifting assembly.

[0013] Preferably, the dialing assembly comprises a hanger, a support, a support plate, a clutch, a plurality of dialing plates, two sides of the hanger are rotationally connected with reference shafts, the supports are fixedly connected to the two ends of the rolling cylinder body, the supports are fixedly connected with the reference shafts, the support plate is connected to one side of the hanger, the support plate is connected with a driving motor, the reference shafts are rotationally connected with dialing shafts and are provided with rotary torsional springs relative to the reference shafts, the clutch is connected between the dialing shafts and the main shaft of the driving motor, and the plurality of dialing plates are spaced apart and connected to the outer sides of the dialing shafts, and the dialing plates are provided in one-to-one correspondence with the dialing rods.

[0014] Preferably, the support plate is provided with a sliding groove, a side plate is slidingly connected in the sliding groove, the side plate is fixedly connected with the driving motor, and a horizontal oil cylinder is fixedly connected in the sliding groove, and the telescopic end of the horizontal oil cylinder is fixedly connected with the side plate.

[0015] Preferably, the obstacles include un-solidified mortar or concrete.

[0016] Preferably, the side wall of the test soil bin is provided with a grouting hole.

[0017] Compared with the prior art, the test device for shield spiral soil ejection has the following beneficial effects: the test device for shield spiral soil ejection provided by the application fills the test soil in layers in the test soil bin and compacts the test soil in layers through the rolling device, the rolling cylinder body of the rolling device compacts the soil on the filled soil on the side during the soil compaction process, when the rolling cylinder body contacts or approaches the filled bag, the steel bars pushed out by the emitter penetrate into the filled bag, and then the rolling cylinder body rolls over the soil above the filled bag, on the one hand, the soil compaction causes the flexible filled bag to form extrusion deformation, due to the different angles of the steel bars penetrating through, the filled bag breaks at different positions, so that the filled bag further breaks under pressure to form block-shaped objects with different shapes relative to the soil, and the different angles of the steel bars make the angles of the obstacles in the soil relative to the hollow spiral shaft different, so that, during the soil ejection process, the hard obstacles and the steel bars in different directions are affected by the soil in the soil bin, when the soil pressure sensor receives different soil pressures, the test adds water and grout to change the fluidity, so as to test the soil ejection effect of the spiral soil ejection assembly under different working conditions, and in summary, the application can truly reflect the actual complex geological conditions by setting different obstacles in the soil and rolling the rolling cylinder body over the soil above the filled bag, which facilitates the research on the soil pressure change law of the soil particles of different solidified soil discharged from the soil bin, makes an important contribution to the improvement scheme for the faults occurring in the actual soil ejection process, and reduces the fault conditions in the actual soil ejection process. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure diagram of the test device for shield spiral soil ejection provided by the embodiment of the application is shown in the figure.

[0019] Figure 2A partial cutaway structure schematic view of a rolling cylinder in a test device for shield spiral unearthing provided by an embodiment of the present application is provided.

[0020] Figure 3 A partial enlarged view of part E in FIG. Figure 2

[0021] Figure 4 A partial enlarged view of part F in FIG. Figure 2

[0022] Figure 5 A structure schematic view of a launcher in a test device for shield spiral unearthing provided by an embodiment of the present application is provided.

[0023] Figure 6 A structure schematic view of a spiral unearthing device in a test device for shield spiral unearthing provided by an embodiment of the present application is provided.

[0024] Explanation of reference signs:

[0025] 1, test soil bin; 11, grouting hole; 2, rolling assembly; 21, rolling cylinder; 3, guide base; 4, shield cutter head; 5, spiral unearthing assembly; 51, outer shell; 52, hollow spiral shaft; 53, soil pressure sensor; 54, soil collecting bin; 55, crushing rod; 6, multiple filling bags; 7, launcher; 71, launching port; 72, support plate; 73, first sliding groove; 74, first sliding block; 75, force storage spring; 76, mounting sleeve; 77, sliding hole; 78, limiting rod; 79, limiting hole; 791, toggle lever; 8, reinforcing bar; 81, hanger; 82, reference shaft; 83, support; 84, support plate; 841, sliding groove; 842, side plate; 843, horizontal oil cylinder; 85, driving motor; 86, toggle shaft; 87, clutch; 88, toggle plate. DETAILED DESCRIPTION

[0026] One specific embodiment of the present application is described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present application is not limited by the specific embodiment.

[0027] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the technical solutions of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] ​​With reference to Figure 1 、 Figure 2 and 6 , the present application provides a test device for shield spiral excavation, comprising a test soil bin 1, a shield cutter head 4 and a spiral excavation assembly 5, the shield cutter head 4 is used to excavate the test soil layer in the test soil bin 1 through horizontal feeding, and the spiral excavation assembly 5 is used to transport the excavated muck, further comprising: a plurality of filling bags 6, a rolling assembly 2 and a plurality of emitters 7, the plurality of filling bags 6 are sequentially and spacedly buried on the test soil layer of the test soil bin 1, the filling bags 6 are filled with obstacles, the rolling assembly 2 comprises a rolling cylinder 21, the rolling cylinder 21 is rollingly connected in the test soil bin 1, so that the rolling cylinder 21 rolls along the length direction of the wall of the test soil bin 1, the rolling cylinder 21 is located on the upper surface of the test soil layer, a plurality of emission ports 71 are formed in the cylinder wall of the rolling cylinder 21, the plurality of emitters 7 are all connected to the inner wall of the rolling cylinder 21, the plurality of emitters 7 are one-to-one corresponding to the positions close to the respective emission ports 71, the emission port of the emitter 7 is directly opposite to the emission port 71, and a reinforcing steel bar 8 is connected to the emitter 7, the center line of each reinforcing steel bar 8 points to the center line of the rolling cylinder 21, so that the emitter 7 emits the reinforcing steel bar 8 from the corresponding emission port 71, specifically, the shield cutter head 4 is arranged on one width side wall of the test soil bin 1, the spiral excavation assembly 5 is connected in the shield cutter head 4, the spiral excavation assembly 5 comprises an outer shell 51 and a hollow spiral shaft 52, the hollow spiral shaft 52 is rotationally connected in the outer shell 51, a plurality of reserved holes are arranged on the outer side of the outer shell 51, and a soil pressure sensor 53 is fixedly connected in the reserved hole, and the excavated muck is transported through the hollow spiral shaft 52.

[0029] Specifically, the bottom of the shield cutter head 4 is connected with a guide base 3, the guide base 3 is fixedly connected to the test soil bin 1, an opening is formed in the side wall of the test soil bin 1 close to the shield cutter head 4, and the shield cutter head 4 is used to feed horizontally into the test soil bin 1 from the opening.

[0030] The guide base 3 pushes the shield cutter head 4 through horizontal jacking cylinders, which is a prior art, so the present application does not show it in the drawings and does not make specific limitations, when the shield cutter head 4 is pushed into the test soil bin 1, the shield cutter head 4 enters the test soil bin 1 to perform rotary cutting on the soil body, wherein the filling bag 6 is wrapped with a flexible material, such as a rubber film or a plastic film.

[0031] The emitter 7 emits the reinforcing steel bars 8 into the filling bag 6 when the rolling cylinder 21 is rolling, and the emitter 7 at different angles can insert the reinforcing steel bars 8 into the filling bag 6 in the vertical or inclined state, the reinforcing steel bars 8 at different angles relative to the filling bag 6 can set the concrete hardened blocks with the reinforcing steel bars 8 at different angles in the test soil body, simulate the soil discharge of the screw soil removal assembly 5 when the shield cutter head 4 cuts the abandoned pile on the tunnel path, and test the regulation and control capability of the screw soil removal assembly 5 in different soil bodies, and one end of the shell 51 is fixedly connected with the soil collecting bin 54, one end of the hollow screw shaft 52 is fixedly connected with the crushing rod 55, and the crushing rod 55 is located in the soil collecting bin 54.

[0032] In the above embodiment, the present application fills the test soil in the test soil bin 1 in layers and compacts the test soil in layers through the rolling assembly 2, and when the rolling cylinder 21 of the rolling assembly 2 contacts or approaches the filling bag 6 during the process of compacting the soil on the upper side of the filled soil, the reinforcing steel bars 8 pushed out by the emitter 7 penetrate into the filling bag 6, and then the rolling cylinder 21 rolls over the soil above the filling bag 6, on the one hand, the soil compaction causes the flexible filling bag 6 to form extrusion deformation, and the filling bag 6 breaks at different positions due to the angle of the reinforcing steel bars 8, so that the filling bag 6 further breaks under pressure to form blocks with different shapes relative to the soil, and the reinforcing steel bars 8 at different angles make the angle of the obstacles in the soil body relative to the hollow screw shaft 52 different, so that the hard obstacles and the reinforcing steel bars 8 at different positions are affected by the soil along the shell 51, and the soil pressure sensor 53 receives different soil pressures, the test adds water and grout to change the fluidity, so as to test the soil discharge effect of the screw soil removal assembly 5 under different working conditions, test different pressures and improvement schemes, and ensure the smoothness of soil discharge.

[0033] And in the concrete or pure cement slurry with large slump of the filling bag 6, the cement slurry in the local soil after the filling bag 6 is punctured by the reinforcing steel bars 8 has strong fluidity and plays a role in grouting and reinforcing the soil in a larger area relative to the local pile fragment, so that the soil in the test soil bin 1 has different strength areas, the soil discharge condition of the screw soil removal assembly 5 is tested, and the soil pressure sensor 53 cooperates with the monitoring to form the effect of adjusting the soil discharge smoothness, so as to facilitate the performance test of the screw soil removal assembly 5 in many aspects, and avoid the soil discharge failure of the screw soil removal assembly 5 in the actual tunnel excavation process.

[0034] Reference Figure 2 , Figure 3 and Figure 5As a specific embodiment of the present invention, the launcher 7 includes: a support plate 72, a first slider 74, a storage spring 75, a mounting sleeve 76, a limiting rod 78, a toggle rod 791, and a first spring 792. The support plate 72 is fixedly connected to the inner wall of the rolling cylinder 21 at the launch port 71. The support plate 72 has a first groove 73 along its length extension direction. The first slider 74 is slidably connected in the first groove 73. The storage spring 75 is placed in the first groove 73 and one end is connected to the first slider 792. 4. Fixed connection: The first mounting sleeve 76 is fixedly connected to the slider 74. The bottom of the first sliding groove 73 is provided with a sliding hole 77. A limit rod 78 is slidably connected in the sliding hole 77. A limit hole 79 is provided on the side of the first slider 74 that contacts the bottom of the first sliding groove 73. One end of the limit rod 78 is correspondingly set with the limit hole 79. The actuating rod 791 is fixedly connected to the other end of the limit rod 78. The first spring 792 is fixedly connected between the actuating rod 791 and the outer wall of the support plate 72. The actuating rod 791 is driven to move through the actuating assembly.

[0035] In this invention, the compaction cylinder 21 can be equipped with a certain number of launching ports 71 according to the test requirements. Each launching port 71 can launch one steel bar 8. The compaction cylinder 21 is outside the test soil chamber 1. One end of the steel bar 8 is inserted into the mounting sleeve 76 and clamped by the rubber layer. The first slider 74 slides in the first sliding groove 73 by the hydraulic rod pushing against the steel bar 8, and the storage spring 75 stores the force. The limiting rod 78 can be inserted into the limiting hole 79 by the elastic force of the first spring 792 and limit the first slider 74. When the compaction cylinder 21 Move to the position or vicinity of the filling bag 6, and push the toggle assembly to pull out the limiting hole 79. Under the action of the storage spring 75, the first slider 74 quickly resets and collides with the end face of the first chute 73. The reinforcing bar 8 is thrown out by the mounting sleeve 76. The reinforcing bar 8 is inserted into the soil or into the filling bag 6. Obstacles of different states are set in the test soil chamber 1 to facilitate the test of the spiral soil discharge assembly 5 for soil discharge under different conditions. By adding water and slurry to change its fluidity, the pressure change is detected and controlled and studied to make the soil discharge smooth.

[0036] refer to Figure 2 and Figure 4 In one specific embodiment of the present invention, the actuation assembly includes a hanger 81, a bracket 83, a support plate 84, a clutch 87, and multiple actuation plates 88. A reference shaft 82 is rotatably connected to both sides of the hanger 81. The bracket 83 is fixed to both ends of the rolling cylinder 21 and is fixed to the reference shaft 82. The support plate 84 is connected to one side of the hanger 81 and is connected to a drive motor 85. The reference shaft 82 is rotatably connected to an actuation shaft 86 and is provided with a torsion spring relative to the reference shaft 82. The clutch 87 is connected between the actuation shaft 86 and the main shaft of the drive motor 85. Multiple actuation plates 88 are spaced apart and connected to the outside of the actuation shaft 86. Each actuation plate 88 corresponds to an actuation lever 791.

[0037] Further, the hanger 81 is horizontally moved by a travelling crane in the factory building, and a vertical lifting oil cylinder is arranged to press the soil in layers.

[0038] In this embodiment, the hanger 81 is moved, the rolling cylinder 21 is statically pressed by gravity, and the soil is rolled on the surface of the soil body. When the reinforcing steel bars 8 are needed to be arranged, the clutch 87 is operated to make the main shaft of the driving motor 85 and the poking shaft 86 engage, the driving motor 85 can drive the poking shaft 86 to rotate, so that the reinforcing steel bars 8 are inserted into the soil body or the filling bag 6 by the rotation of the poking shaft 86 and the contact of the poking plate 88 with the poking rod 791.

[0039] Reference Figure 4 As a specific embodiment of the present application, the support plate 84 is provided with a sliding groove 841, the sliding groove 841 is slidably connected with a side plate 842, the side plate 842 is fixedly connected with the driving motor 85, and the sliding groove 841 is fixedly connected with a horizontal oil cylinder 843, and the telescopic end of the horizontal oil cylinder 843 is fixedly connected with the side plate 842.

[0040] When the poking shaft 86 rotates in situ, part of the poking plate 88 is opposite to the poking rod 791, so that the reinforcing steel bars 8 at this position are poked to play a barrier role, and part of the poking plate 88 is misaligned with the poking rod 791, the side plate 842, the driving motor 85 and the poking shaft 86 are axially displaced by the horizontal oil cylinder 843, so that the originally misaligned poking plate 88 is aligned with the poking rod 791, the obstacles are distributed at different positions in the soil body, the positions are different relative to the cutting surface of the shield cutter head 4, so that the positions of the soil falling into the soil collecting bin 54 are different, and the smooth soil discharge of the screw soil discharging assembly 5 is also affected, so that the screw soil discharging assembly 5 is tested.

[0041] Reference Figure 1 As an additional embodiment of the present application, the side wall of the test soil bin 1 is provided with a grouting hole 11, the test soil is filled in layers in the test soil bin 1, a transverse hole is drilled in the test soil through the grouting hole 11, and a main slurry is injected into the test soil in the hole, so that the soil body is reinforced, the pressure monitoring feedback of the soil pressure sensor 53 of the screw soil discharging assembly 5 can be matched, and necessary means such as water injection / hollow screw shaft 52 into the soil bin can be used in time to improve the soil body with insufficient fluidity, so that the change rule of the soil pressure in the process of discharging the soil body with different solidified soil particles from the soil bin is facilitated to be studied.

[0042] The above disclosure is only a few specific embodiments of the present application, but the embodiments of the present application are not limited to this, any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. A test device for shield tunneling with spiral excavation, comprising a test soil chamber (1), a shield cutter head (4), and a spiral excavation assembly (5), wherein the shield cutter head (4) excavates the test soil layer within the test soil chamber (1) by horizontal feeding, and the spiral excavation assembly (5) is used to transport the excavated soil, characterized in that: Also includes: Multiple filling bags (6) are sequentially and intermittently buried on the test soil layer of the test soil chamber (1), and the filling bags (6) are filled with obstacles; The compaction assembly (2) includes a compaction cylinder (21), which is rotatably connected to the test soil chamber (1) so that the compaction cylinder (21) rolls along the length of the test soil chamber (1) wall. The compaction cylinder (21) is located on the upper surface of the test soil layer, and the cylinder wall of the compaction cylinder (21) is provided with multiple emission ports (71). Multiple emitters (7) are connected to the inner wall of the rolling cylinder (21). Each emitter (7) is positioned close to a corresponding launch port (71). The launch port of each emitter (7) faces the launch port (71). A steel bar (8) is connected to each emitter (7), and the center line of each steel bar (8) points to the center line of the rolling cylinder (21) so that the emitter (7) can launch the steel bar (8) from the corresponding launch port (71). Each emitter (7) includes: a support plate (72) and a first slider. (74), a storage spring (75), a mounting sleeve (76), a toggle lever (791), and a first spring (792). The support plate (72) is fixedly connected to the launch port (71). The support plate (72) has a first sliding groove (73) along its length. The first slider (74) slides in the first sliding groove (73). The storage spring (75) is fixedly connected to the first slider (74). The first mounting sleeve (76) is fixedly connected to the slider (74). A sliding hole (77) is opened at the bottom of the first sliding groove (73). The sliding hole (77) is slidably connected to the first slider (74). A limit rod (78) is provided, a first slider (74) has a limit hole (79), a toggle rod (791) is fixed to the other end of the limit rod (78), a first spring (792) is connected between the toggle rod (791) and the support plate (72), the toggle rod (791) is driven to move through the toggle assembly, the toggle assembly includes a hanger (81), a bracket (83), a support plate (84), a clutch (87), and multiple toggle plates (88), the hanger (81) is rotatably connected to a reference shaft (82) on both sides, the bracket (84) and the support plate (85) are respectively connected to a reference shaft (82), the support plate (86) and the support plate (87) are respectively connected to a reference shaft (88). 3) The support (83) is fixed to both ends of the rolling cylinder (21), the bracket (83) is fixed to the reference shaft (82), the support plate (84) is connected to one side of the hanger (81), the support plate (84) is connected to the drive motor (85), the reference shaft (82) is rotatably connected to the actuating shaft (86), the clutch (87) is connected between the actuating shaft (86) and the main shaft of the drive motor (85), and multiple actuating plates (88) are all spaced apart and connected to the outside of the actuating shaft (86). The positions of the actuating plates (88) and the actuating rod (791) are set one-to-one.

2. The test device for shield tunneling with spiral excavation as described in claim 1, characterized in that, The multiple transmitters (7) are staggered and distributed on the inner wall of the rolling cylinder (21).

3. The test device for shield tunneling with spiral excavation as described in claim 1, characterized in that, The obstacles include uncured mortar or concrete.

4. The test device for shield tunneling with spiral excavation as described in claim 1, characterized in that, The support plate (84) is provided with a sliding groove (841), a side plate (842) is slidably connected in the sliding groove (841), a drive motor (85) is fixedly connected in the side plate (842), a horizontal oil cylinder (843) is fixedly connected in the sliding groove (841), and the telescopic end of the horizontal oil cylinder (843) is fixedly connected to the side plate (842).

5. The test device for shield tunneling with spiral excavation as described in claim 1, characterized in that, The shield cutter head (4) is set on one width of the side wall of the test soil chamber (1). The spiral soil discharge assembly (5) is connected inside the shield cutter head (4). The spiral soil discharge assembly (5) includes a shell (51) and a hollow spiral shaft (52). The hollow spiral shaft (52) is rotatably connected inside the shell (51). Multiple reserved holes are provided on the outside of the shell (51), and soil pressure sensors (53) are fixedly connected in the reserved holes. The excavated soil is transported through the hollow spiral shaft (52).

6. The test device for shield tunneling with spiral excavation as described in claim 5, characterized in that, One end of the outer shell (51) is fixedly connected to the soil collection chamber (54), and one end of the hollow spiral shaft (52) is fixedly connected to the crushing rod (55), which is located inside the soil collection chamber (54).

7. The test device for shield tunneling with spiral excavation as described in claim 5, characterized in that, The multiple reserved holes are spirally staggered on the outside of the outer shell (51).

8. The test device for shield tunneling with spiral excavation as described in claim 1, characterized in that, The test soil chamber (1) has grouting holes (11) on its side wall.

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