TBM Tunneling Soil and Mudstone Composite Strata Sampling Device

Abstract

This utility model discloses a soil and rock sampling device for mud-sand-rock composite strata in TBM tunnel excavation. It mainly includes a muck conveyor belt, two muck conveyor belts, a block, and two inclined plates. The block blocks the soil and rock debris, allowing the soil and rock debris to be sampled to enter the inclined plates along the inclined surfaces of the block, and then enter the muck conveyor belts through the inclined plates. This allows the sample to be transported separately, making the sampling process simpler and preventing it from mixing with other soil and rock debris, which could lead to inaccurate sampling.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel segment monitoring, and in particular to a soil and rock sampling device for mud-sand-rock composite strata in TBM tunnel excavation. Background Technology

[0002] Sampling of rock and soil (rock debris and soil debris) is a key technical step in the construction of TBM tunnels, with purposes encompassing multiple dimensions such as geological monitoring, construction optimization, safety control, and engineering research.

[0003] During construction, the composition of rock debris (such as the proportion of hard rock) directly affects the wear rate of the cutting tools. In highly abrasive hard rock sections, it is necessary to adjust the cutter head speed, thrust, and cutting tool material (such as using wear-resistant materials) to extend the tool life. For example, in the Dahuo Reservoir water conveyance project in Liaoning Province, the cutter head structure was optimized through rock debris analysis to reduce the frequency of tool replacement.

[0004] Analyzing the physical properties of construction waste (such as particle size distribution and moisture content) can guide adjustments to foaming agent concentration and the air-liquid ratio, thereby optimizing the improvement effect. For example, Wuxi Metro Line 3 improved the sand layer with foam to reduce the problems of cutterhead caking and gushing, and controlled surface subsidence.

[0005] In existing technologies, slag is dropped from a cutterhead onto a conveyor belt or other conveying device, and then sampled manually. Manual sampling typically falls into two modes. One mode involves direct sampling on the conveyor, but the relatively high conveying speed (usually 3-5 m / s) makes manual sampling inconvenient and poses safety hazards. The other mode requires sampling within the rock and soil pile (slag yard), which may lead to sample errors due to the mixing of slag from different time periods, resulting in inaccurate sampling.

[0006] Therefore, there is an urgent need for a sampling device that can provide accurate sampling while minimizing safety risks. Utility Model Content

[0007] The purpose of this invention is to provide a soil and rock sampling device for mudstone-sandstone composite strata used in TBM tunneling, in order to solve the above-mentioned technical problems.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A soil and rock sampling device for mudstone-sandstone composite strata in TBM tunnel excavation includes a muck conveyor belt for conveying soil and rock debris, and two muck conveyor belts respectively set on both sides of the muck conveyor belt and parallel to the muck conveyor belt, with the muck conveyor belts set below the muck conveyor belt. Both rock slag conveyor belts are equipped with inclined plates between themselves and the slag discharge conveyor belts. One end of the inclined plate rests against the upper surface of the side end of the rock slag conveyor belt closest to the slag discharge conveyor belt, and the other end of the inclined plate abuts and fits against the side end of the slag discharge conveyor belt, with its upper boundary line lying on the same plane as the upper surface of the slag discharge conveyor belt; and The stop block adopts a V-shaped structure, with its tip facing the opposite direction of the conveying direction of the slag discharge conveyor belt. The stop block is set on the upper surface of the slag discharge conveyor belt, and the outer boundary lines of the two bottom ends of the V-shaped stop block are respectively located on the same plane as the end faces of the two sides of the slag discharge conveyor belt.

[0009] In some embodiments, the system further includes a frame with a cross-shaped groove, and the four openings of the groove are respectively located on the four circumferential sides of the frame. The slag conveyor belt passes through one of the grooves, and a stop block is located in the groove. The two ends of the slag conveyor belt abut against and fit against the two side walls of the groove. Two inclined plates are respectively located at the two ends of another groove, and the two side surfaces of the two inclined plates along the rock and soil conveying direction abut against and fit against the inner side wall of the other groove.

[0010] In some embodiments, a connecting rod is provided between the two feet of the block, and a telescopic member is provided on the upper surface of the frame. The telescopic end of the telescopic member passes through the upper side wall of the frame, and one end is connected to the upper surface of the connecting rod.

[0011] In some embodiments, the lower surface of the stop block is provided with a brush layer, which abuts against the upper surface of the slag discharge conveyor belt.

[0012] In some embodiments, the inclined plate adopts a screening plate structure, and a mud conveyor belt is provided between the two rock slag conveyor belts and the slag discharge conveyor belt. The upper and lower surfaces of the mud conveyor belts are parallel to the upper and lower surfaces of the rock slag conveyor belts, respectively. The two mud conveyor belts are respectively located on the lower side of the two inclined plates, and the conveying direction of the mud conveyor belts is consistent with the conveying direction of the rock slag conveyor belts.

[0013] In some embodiments, the conveying direction of the sludge conveyor belt is the same as that of the rock slag conveyor belt.

[0014] In some embodiments, the outer wall of the groove with the inclined plate in the frame is provided with a pneumatic hammer.

[0015] In some embodiments, the sludge conveyor belts are symmetrically arranged on both sides of the slag discharge conveyor belt.

[0016] Compared with the prior art, the advantages of this utility model are: In this invention, the rock and soil debris is blocked by a baffle, allowing the rock and soil debris to be sampled to enter the inclined plate along the inclined surface of the baffle, and then enter the rock debris conveyor belt through the inclined plate. This allows the sample to be transported separately, making the sampling process simpler and preventing it from mixing with other rock and soil debris, which would lead to inaccurate sampling. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of a soil and mudstone composite stratum sampling device for TBM tunnel boring according to an embodiment of this application; Figure 2 This is a front cross-sectional schematic diagram of a soil and mudstone composite stratum sampling device for TBM tunnel boring according to an embodiment of this application; Figure 3 This is a top view schematic diagram of a soil and rock sampling device for mudstone-sandstone composite strata used in TBM tunneling, according to an embodiment of this application. Figure 4 This is a cross-sectional top view schematic diagram of a soil and mudstone composite stratum sampling device for TBM tunnel boring according to an embodiment of this application; Figure 5 This is a side view schematic diagram of a soil and mudstone composite stratum sampling device for TBM tunnel boring according to an embodiment of this application; Figure 6 This is a front view of the inclined plate and frame of a soil and mudstone composite stratum sampling device for TBM tunneling according to an embodiment of this application after installation. Figure 7 This is a side view of the inclined plate and frame of a soil and mudstone composite stratum sampling device for TBM tunnel boring according to an embodiment of this application after installation. Figure 8 This is a side view of the frame of a soil and mudstone composite stratum sampling device for TBM tunnel boring according to an embodiment of this application; Figure 9 This is a bottom view of the inclined plate and frame of a soil and rock sampling device for mudstone-sandstone composite strata used in TBM tunneling according to an embodiment of this application; Figure 10 This is a bottom view of the frame of a soil and mudstone composite stratum sampling device for TBM tunnel boring according to an embodiment of this application; Figure label: 1-Slag discharge conveyor belt, 2- Rock slag conveyor belt, 3- Inclined plate, 4-Stop, 41-Connecting rod, 5-Frame, 51-Groove, 6-Telescopic component, 7-Brush layer, 8-Sludge conveyor belt, 9-Pneumatic hammer component. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0023] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] It should be understood that the rock and soil debris falls from the cutterhead onto a conveyor belt or other conveying device, and then is sampled manually. Manual sampling typically falls into two modes. One mode involves direct sampling on the conveyor. However, because the conveyor speed is usually 3-5 m / s, this is relatively fast, making manual sampling inconvenient and posing safety hazards. The other sampling mode requires sampling within the rock and soil pile (slag yard), which may lead to sample errors due to the mixing of debris from different time periods, resulting in inaccurate sampling.

[0027] To improve the above problems, this embodiment provides a soil and rock sampling device for mudstone-sandstone composite strata in TBM tunneling, which mainly includes a muck conveyor belt 1, two rock muck conveyor belts 2, a stop block 4, and two inclined plates 3.

[0028] In this embodiment, the slag discharge conveyor belt 1 is a belt conveyor used to transport rock and soil slag, which is existing technology and will not be described in detail.

[0029] In this embodiment, as Figure 1 As shown, two rock slag conveyor belts 2 are respectively set on both sides of the slag discharge conveyor belt 1 and are parallel to the slag discharge conveyor belt 1. The rock slag conveyor belts 2 are set on the lower side of the slag discharge conveyor belt 1. An inclined plate 3 is provided between the two rock slag conveyor belts 2 and the slag discharge conveyor belt 1. One end of the inclined plate 3 rests on the upper surface of the side end of the rock slag conveyor belt 2 near the slag discharge conveyor belt 1, and the end face of the other end of the inclined plate 3 abuts and fits against the side end of the slag discharge conveyor belt 1. The upper boundary line is located on the same plane as the upper surface of the slag discharge conveyor belt 1.

[0030] In this embodiment, as Figure 1 and Figure 4 As shown, the stop block 4 adopts a V-shaped structure, and the two legs of the stop block 4 are of the same length. The tip of the stop block 4 is opposite to the conveying direction of the slag conveyor belt 1. The stop block 4 is set on the upper surface of the slag conveyor belt 1. The outer boundary lines of the end faces of the bottom of the two legs of the V-shaped stop block 4 are respectively located on the same plane as the end faces of the two sides of the slag conveyor belt 1. The symmetry line of the stop block 4 is located on the same plane as the symmetry line of the upper surface of the slag conveyor belt 1. Thus, when the rock and soil slag is conveyed on the slag conveyor belt 1, it is blocked by the stop block 4, and then enters the inclined plate 3 along the outer surface of the two legs of the stop block 4, and then reaches the surface of the rock slag conveyor belt 2 through the inclined plate 3.

[0031] In this embodiment, the device further includes a frame 5, which has a cross-shaped groove 51. The four slots of the groove 51 are respectively located on the four circumferential sides of the frame 5. The slag conveyor belt 1 passes through one of the grooves 51, and the stop block 4 is located in the groove 51. The two ends of the slag conveyor belt 1 abut against and fit against the two side walls of the groove 51. Two inclined plates 3 are respectively located at the two ends of the other groove 51, and the two side surfaces of the two inclined plates 3 along the rock and soil conveying direction abut against and fit against the inner side wall of the other groove 51. The lower surface of the frame 5 is parallel to the lower surface of the inclined plate 3.

[0032] Support devices, such as support rods, support columns, or support frames, can be installed on the underside of the frame 5 and each conveyor belt to ensure that the height between the frame 5 and each conveyor belt meets the requirements. These are all existing technologies and will not be elaborated further.

[0033] In this embodiment, a connecting rod 41 is provided between the two feet of the block 4, and a telescopic member 6 is provided on the upper surface of the frame 5. The telescopic end of the telescopic member 6 passes through the upper side wall of the frame 5, and one end is connected to the upper surface of the connecting rod 41. The axial direction of the telescopic end of the telescopic member 6 is perpendicular to the upper surface of the slag discharge conveyor belt 1, so that the telescopic member 6 can drive the block 4 to move relative to the slag discharge conveyor belt 1.

[0034] The telescopic component 6 can be controlled remotely, which is existing technology and will not be elaborated further.

[0035] Among them, the telescopic component 6 can be a telescopic device such as an electric push rod or a hydraulic push rod.

[0036] In this embodiment, the lower surface of the baffle 4 is provided with a brush layer 7, which abuts against the upper surface of the slag discharge conveyor belt 1, thereby preventing the baffle 4 from directly abutting against the slag discharge conveyor belt 1.

[0037] In this embodiment, the inclined plate 3 adopts a screening plate structure, and a mud conveyor belt 8 is respectively provided between the two rock slag conveyor belts 2 and the slag discharge conveyor belt 1. The upper and lower surfaces of the mud conveyor belt 8 are parallel to the upper and lower surfaces of the rock slag conveyor belt 2, respectively. The two mud conveyor belts 8 are respectively set on the lower side of the two inclined plates 3. The conveying direction of the mud conveyor belt 8 is consistent with the conveying direction of the rock slag conveyor belt 2. Thus, when the rock and soil slag is conveyed on the surface of the inclined plate 3, the mud is screened and then falls to the mud conveyor belt 8 for conveying, thereby performing preliminary screening of rock slag and mud, making the subsequent sample processing more convenient.

[0038] Among them, the mud conveyor belt 8 is symmetrically arranged on both sides of the slag discharge conveyor belt 1, and the conveying speeds of the mud conveyor belt 8, the rock slag conveyor belt 2 and the slag discharge conveyor belt 1 are the same.

[0039] The size of the sieve holes in the inclined plate 3 for screening can be set according to requirements.

[0040] In this embodiment, the outer wall of the groove 51 of the inclined plate 3 in the frame 5 is provided with an air hammer 9. Specifically, the side wall of the front or rear end of the frame 5 is provided with two air hammers 9. The two air hammers 9 are respectively set on the outer side of the groove 51 of the inclined plate 3 in the frame 5, so that the mud and sludge falling efficiency is high.

[0041] In this embodiment, when sampling is required, the telescopic end of the telescopic component 6 drives the stop block 4 to move towards the slag conveyor belt 1, thereby allowing the rock and soil slag on the slag conveyor belt 1 to be conveyed along the outer inclined surface of the two feet of the stop block 4. This allows the rock slag to enter the rock conveyor belt through the inclined plate 3. At the same time, the mud slag falls to the mud conveyor belt 8 under the screening action of the inclined plate 3. Thus, the rock slag and mud slag to be sampled are respectively conveyed to the end of the conveyor belt. Then, the operator can collect them through the collection device to complete the sampling. After the sampling is completed, the telescopic component 6 drives the stop block 4 away from the slag conveyor belt 1, so that the slag conveyor belt 1 can carry out slag conveying normally. This makes the sampling of samples simpler and more controllable, and at the same time, it will not mix with other slag, thus making the sampling more accurate.

[0042] The collection device can be a collection bucket, collection frame, etc., and it can be operated according to the sample preservation requirements during collection. It is existing technology and will not be described in detail.

Claims

1. A TBM tunneling with mudstone and rock composite stratum geotechnical sampling device, comprising a slag conveying belt (1) for conveying geotechnical slag, characterized in that, Also includes: Two rock slag conveyor belts (2) are respectively set on both sides of the slag discharge conveyor belt (1) and parallel to the slag discharge conveyor belt (1). The rock slag conveyor belts (2) are set on the lower side of the slag discharge conveyor belt (1). Two rock slag conveyor belts (2) are each provided with an inclined plate (3) between them and the slag discharge conveyor belt (1). One end of the inclined plate (3) rests against the upper surface of the side end of the rock slag conveyor belt (2) near the slag discharge conveyor belt (1), and the other end of the inclined plate (3) abuts and fits against the side end of the slag discharge conveyor belt (1), with its upper boundary line on the same plane as the upper surface of the slag discharge conveyor belt (1). The stop block (4) adopts a V-shaped structure and its tip is opposite to the conveying direction of the slag conveyor belt (1). The stop block (4) is set on the upper surface of the slag conveyor belt (1). The outer boundary lines of the two bottom ends of the stop block (4) are respectively located on the same plane as the end faces of the two sides of the slag conveyor belt (1).

2. The device according to claim 1, characterized in that: It also includes a frame (5), which has a cross-shaped groove (51) and four slots of the groove (51) are respectively set on the four circumferential sides of the frame (5). The slag conveyor belt (1) passes through one of the grooves (51) and the stop block (4) is set in the groove (51). The two ends of the slag conveyor belt (1) abut against and fit against the two side walls of the groove (51) respectively. Two inclined plates (3) are respectively set at the two ends of the other groove (51), and the two sides of the inclined plates (3) along the rock and soil conveying direction abut against and fit against the inner side wall of the other groove (51) respectively.

3. The device according to claim 2, characterized in that: A connecting rod (41) is provided between the two feet of the stop block (4), and a telescopic component (6) is provided on the upper surface of the frame (5). The telescopic end of the telescopic component (6) passes through the upper side wall of the frame (5), and one end is connected to the upper surface of the connecting rod (41).

4. The device according to claim 3, characterized in that: The lower surface of the stop block (4) is provided with a brush layer (7), which abuts against the upper surface of the slag conveyor belt (1).

5. The device according to claim 4, characterized in that: The inclined plate (3) adopts a screening plate structure, and a mud conveyor belt (8) is provided between the two rock slag conveyor belts (2) and the slag conveyor belt (1). The upper and lower surfaces of the mud conveyor belt (8) are parallel to the upper and lower surfaces of the rock slag conveyor belt (2), and the two mud conveyor belts (8) are respectively located on the lower side of the two inclined plates (3).

6. The device according to claim 5, wherein the device is characterized in that: The conveying direction of the mud conveyor belt (8) is the same as that of the rock slag conveyor belt (2).

7. The device according to claim 6, characterized in that: The frame (5) has a groove (51) of inclined plate (3) and an air hammer (9) is provided on the outer wall.

8. The device according to claim 7, characterized in that: The sludge conveyor belt (8) is symmetrically arranged on both sides of the slag discharge conveyor belt (1).

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