A deep wall protection mud sampling device for underground continuous wall
By designing a lifting chamber and lifting components in the deep wall slurry sampling device for underground continuous walls, the problems of mud sample contamination and mixing in existing devices have been solved, thus ensuring the authenticity and accuracy of mud sample testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CCCC THIRD HIGHWAY ENG CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-09
AI Technical Summary
During use, existing underground continuous wall deep wall slurry sampling devices may cause upper layer slurry to seep into the gaps between movable baffles, leading to sample contamination. When the sealing of the multi-chamber structure is insufficient, the edges of the baffles are prone to crossflow, causing slurry from different depths to mix, resulting in distorted test indicators.
Design a device comprising a sampling bucket, a support tube, and a lifting assembly. The sampling bucket has a lifting chamber, and the mud is transported to the ground through the lifting tube. The mud is isolated and extracted by the cooperation of the lifting plate and the eccentric wheel, ensuring the authenticity of the sample.
It effectively isolates the interference of surface and middle layer mud, ensures the authenticity of deep mud samples, avoids sample contamination and mixing, and improves detection accuracy.
Smart Images
Figure CN224341290U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of this utility model belong to the field of mud sampling technology, and more specifically, relate to a mud sampling device for deep wall protection of underground continuous walls. Background Technology
[0002] In the construction of diaphragm walls under complex geological conditions, the performance control of the wall-supporting mud directly determines the stability of the trench wall and the safety of the project. The mud needs to perform multiple functions in ultra-deep trench sections, including hydrostatic pressure balancing, suspending drill cuttings, and lubricating the trench wall. Its core parameters, such as specific gravity, viscosity, and sand content, change significantly with depth: shallow loose soil layers require low-specific-gravity mud to prevent damage from excessive pore pressure, while deep confined water-sand layers require high viscosity to inhibit seepage erosion. Failure to accurately obtain deep samples for real-time testing can easily lead to a chain reaction of problems such as trench wall collapse and mud inclusion in concrete. This can range from affecting the verticality of the trench to causing wall leakage and even ground subsidence in the surrounding area. Therefore, stratified sampling is not only a fundamental data source for process optimization but also a core technical means to avoid the risk of ground instability.
[0003] In engineering practice, mechanical devices are commonly used for deep sampling. Conventional methods include the dedicated sampler method, which uses a counterweight and a movable sealing structure to keep the sampler closed during descent. Once the target depth is reached, the sampling port opens to collect mud, and then the port closes again for lifting. The sampler consists of a cylindrical barrel, a movable lid, a counterweight, and elastic connectors. The counterweight is connected to the movable lid by ropes, using its own weight to open and close the lid. Through the cooperation of the counterweight module and a movable baffle structure, the baffle closes during descent to isolate shallow fluids. Upon reaching the predetermined depth, the operating rope is pulled to open the cavity, completing the sampling of deep mud. Deep mud sampling can be achieved according to operational requirements.
[0004] However, in the use of existing devices, the gaps between the movable baffles may allow upper-layer mud to seep in, leading to sample contamination; when the multi-chamber structure is not sufficiently sealed, mud can easily flow through the edges of the baffles, causing mud from different depths to mix and resulting in distorted detection indicators. Therefore, there is a need for a mud sampling device for deep retaining walls of diaphragm walls that can sample mud from deep retaining walls without being affected by shallow mud, ensuring successful sampling while guaranteeing the authenticity of the samples. Utility Model Content
[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a sampling device for deep diaphragm wall slurry. The slurry from the deep diaphragm wall slurry enters the lift pipe through the sampling hole and is then transported to the surface via the lift pipe to complete the sampling of the deep diaphragm wall slurry. Since the sampling bucket has an internal lift chamber, the deep diaphragm wall slurry is placed in the lift chamber, which can isolate the surface and middle layers of slurry, avoiding interference from slurry from other strata that could affect the sampling structure and the authenticity of the sample.
[0006] To achieve the above objectives, this utility model provides a sampling device for deep wall slurry of underground continuous wall, including: a sampling bucket, a support pipe and a lifting assembly;
[0007] The sampling bucket is equipped with a square column-shaped lifting cavity;
[0008] The support tube is located at the top of the sampling bucket, and its top end passes through the underground continuous wall to the ground, so that the lifting chamber is connected to the ground.
[0009] The lifting assembly includes a lifting tube, which is hollow and has a sampling hole at its bottom end connected to the lifting cavity. The lifting tube reciprocates radially along the support tube.
[0010] Furthermore, the lifting cavity is surrounded by four inner walls, which are vertical plate structures.
[0011] Furthermore, the sampling bucket also includes an outer wall, which is formed by an inclined trapezoidal plate, and the bottom end of the outer wall is inclined inward, so that the sampling bucket has a square platform structure that is larger at the top and smaller at the bottom.
[0012] The outer wall and the inner wall are enclosed by a top plate, and a through hole is opened in the middle of the top plate. The support tube is located at the through hole and is connected to the lifting cavity through the through hole.
[0013] Furthermore, a support plate is provided at the top of the support tube. Both the support tube and the support plate are rigid components, and the support plate has a central opening.
[0014] Furthermore, the lifting tube is disposed in the support tube, with its top end passing through the central hole of the support plate and the other end disposed in the lifting cavity;
[0015] The lifting tube is also equipped with a sampling tube, which moves with the lifting tube in the lifting cavity, with its top end protruding from the lifting tube and connected to the sampling hole.
[0016] Furthermore, the bottom end of the lifting tube is also provided with a lifting plate. The lifting plates are used in pairs and are respectively located on both sides of the lifting tube, and are rotatably connected by a lifting shaft. The bottom end of the lifting tube is also provided with a baffle. The baffle has a V-shaped structure, and the inclined plates on both sides of the baffle provide a limit for the lifting plate on each side.
[0017] Furthermore, when both lifting plates on both sides rotate to their maximum extent in the opposite direction, the horizontal straight-line distance between the front ends of the two lifting plates is the same as the side length of the lifting cavity, that is, at this time the front ends of both lifting plates are in contact with the inner wall.
[0018] Furthermore, a drive assembly is also provided at the top of the lifting tube;
[0019] The drive assembly includes a push plate fixedly connected to the lifting tube. A gap is reserved between the push plate and the support plate, and a spring is provided in the gap. The spring is sleeved on the lifting tube.
[0020] Furthermore, the top surface of the push plate is curved to form a cylindrical surface, and the top surface of the push plate is provided with an eccentric wheel, which is supported on the ground by a bracket.
[0021] Furthermore, the surface of the eccentric wheel contacts the upper cylindrical surface of the push plate, and when it rotates, it presses against the push plate to cause it to move up and down periodically.
[0022] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects:
[0023] 1. The present invention relates to a sampling device for deep diaphragm wall slurry. The slurry of the deep diaphragm wall enters the lifting pipe through the sampling hole and is then transported to the surface through the lifting pipe to complete the sampling of the deep diaphragm wall slurry. Since the sampling bucket has an internal lifting cavity, the deep diaphragm wall slurry is placed in the lifting cavity, which can isolate the surface and middle layers of slurry and avoid interference from slurry from other strata, thus preventing the slurry from interfering with the sampling structure and affecting the authenticity of the sample.
[0024] 2. The diaphragm wall deep wall slurry sampling device of this utility model controls the lifting pipe to move up and down reciprocally during sampling. When moving downwards, due to the resistance of the slurry, the lifting plate automatically rotates and closes in the opposite direction, allowing the slurry to enter the lifting chamber. When moving upwards, the lifting plate is also subjected to the resistance of the slurry, causing it to open to its maximum extent and continue to lift upwards, squeezing the slurry in the lifting chamber. At this time, the slurry enters the sampling pipe through the sampling hole and continues to move upwards under pressure until it reaches above the ground. The one-way valve allows the slurry to continue moving upwards.
[0025] 3. In the underground continuous wall deep wall slurry sampling device of this utility model, when the eccentric wheel rotates to the maximum compression position, the lifting component is at the lowest position. At this time, the spring is compressed, the eccentric wheel continues to rotate, and under the action of the spring force, the lifting component moves upward. This process is repeated, and the eccentric wheel drives the lifting component to move continuously to extract deep slurry. Attached Figure Description
[0026] Figure 1 This is a cross-sectional view of the lifting assembly of a deep wall slurry sampling device for underground continuous walls, as described in an embodiment of this utility model, with the assembly moved to its lowest point.
[0027] Figure 2 This is a schematic diagram of the bottom end of the lifting component of a deep wall slurry sampling device for underground continuous walls, according to an embodiment of this utility model.
[0028] Figure 3 This is a side view of the structure of a slurry sampling device for deep wall protection of underground continuous walls according to an embodiment of the present invention;
[0029] Figure 4 This is a schematic diagram of the lifting assembly of a deep wall slurry sampling device for underground continuous walls, as shown in an embodiment of the present invention, when it is moved to the top.
[0030] Figure 5 This is a schematic diagram of the one-way valve structure of a deep wall slurry sampling device for underground continuous walls, according to an embodiment of this utility model.
[0031] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-sampling barrel, 101-outer wall, 102-inner wall, 103-top plate, 104-lifting cavity, 105-counterweight cavity, 2-support pipe, 3-support plate, 4-lifting assembly, 401-lifting pipe, 402-sampling hole, 403-sampling pipe, 404-lifting plate, 405-lifting shaft, 406-baffle, 5-drive assembly, 501-push plate, 502-spring, 503-eccentric wheel, 504-drive shaft, 505-bracket. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0033] like Figure 1-4As shown, this utility model embodiment provides a sampling device for deep diaphragm wall retaining mud, including: a sampling bucket 1 disposed deep within the diaphragm wall, a support pipe 2 disposed on the sampling bucket 1, and a lifting assembly 4 disposed within the sampling bucket 1 and the support pipe 2. The sampling bucket 1 has a square-column-shaped lifting cavity 104. The support pipe 2 is located at the top of the sampling bucket 1 and communicates with the lifting cavity 104. The top of the support pipe 2 passes through the diaphragm wall to above ground level, connecting the sampling bucket 1 to the ground. The lifting assembly 4 includes a lifting pipe 401, which is hollow and has a sampling hole 402 at its bottom end connected to the lifting cavity 104. The lifting pipe 401 reciprocates radially along the support pipe 2. The slurry from the deep layer of the diaphragm wall enters the lift pipe 401 through the sampling hole 402, and is then transported to the surface through the lift pipe 401 to complete the sampling of the slurry from the deep layer of the diaphragm wall. Since the sampling bucket 1 is equipped with a lift chamber 104, the slurry from the deep layer of the diaphragm wall is placed in the lift chamber 104, which can isolate the slurry from the surface and middle layers, and avoid interference from the sampling structure caused by slurry from other strata, thus affecting the authenticity of the sample.
[0034] The lifting cavity 104 is surrounded by four inner walls 102, which are vertical plate structures. The sampling bucket 1 also includes an outer wall 101, which is formed by an inclined trapezoidal plate. The bottom end of the outer wall 101 is inclined inward, so that the sampling bucket 1 has a square platform structure that is larger at the top and smaller at the bottom. The top of the outer wall 101 and the inner wall 102 is provided with a top plate 103 for sealing. The top plate 103 has a through hole in the middle, and the support tube 2 is located at the through hole and connected to the lifting cavity 104 through the through hole.
[0035] It is understandable that the sampling bucket 1 is set as an inverted square platform structure, and its top plate 103 blocks the mud above the deep layer of the underground continuous wall to prevent it from flowing downward into the sampling range of the sampling bucket 1, resulting in insufficient sampling purity.
[0036] As a further preferred embodiment, the cavity formed between the outer wall 101 and the inner wall 102 is used as a counterweight cavity 105, and a counterweight block is added to the counterweight cavity 105 to balance the buoyancy effect on the sampling bucket 1 in the mud.
[0037] The top end of the support tube 2 is also provided with a support plate 3. Both the support tube 2 and the support plate 3 are rigid components, and the support plate 3 has a central hole.
[0038] The lifting tube 401 is disposed in the support tube 2, with its top end protruding from the central hole of the support plate 3 and the other end disposed in the lifting cavity 104. A sampling tube 403 is also disposed inside the lifting tube 401. The sampling tube 403 moves with the lifting tube 401 in the lifting cavity 104, with its top end protruding from the lifting tube 401 and connected to the sampling hole 402.
[0039] Understandably, the deep wall protection mud enters the sampling tube 403 through the sampling hole 402 and is transported to the ground level along the sampling tube 403. The workers can then collect it directly from the ground end of the sampling tube 403.
[0040] As a further preferred embodiment, the bottom end of the lifting tube 401 is also provided with a lifting plate 404. The lifting plates 404 are used in pairs and are respectively provided on both sides of the lifting tube 401, and are rotatably connected by a lifting shaft 405. The bottom end of the lifting tube 401 is also provided with a baffle 406. The baffle 406 has a V-shaped structure, and the inclined plates on both sides provide limits for each lifting plate 404. When both lifting plates 404 are rotated to their maximum extent in opposite directions, the horizontal straight-line distance between the front ends of the two lifting plates 404 is the same as the side length of the lifting cavity 104, that is, at this time the front ends of both lifting plates 404 are in contact with the inner wall 102.
[0041] As a further preferred option, such as Figure 5 As shown, the sampling tube 403 is also equipped with a one-way valve, which only allows the mud to flow upwards. The one-way valve includes a valve body, a valve disc, a spring, and a valve seat. The spring provides a restoring force to the valve disc. When subjected to positive pressure, the valve disc is opened to allow the mud to pass smoothly through the one-way valve, while when subjected to reverse pressure, the valve disc is pressed to prevent the mud from flowing backwards.
[0042] Understandably, during sampling, the lifting pipe 401 is controlled to move up and down repeatedly. When moving downwards, due to the resistance of the mud, the lifting plate 404 automatically rotates and closes in the opposite direction, allowing the mud to enter the lifting chamber 104. When moving upwards, the lifting plate 404 is also subjected to the resistance of the mud, causing it to open to its maximum extent and continue to rise, squeezing the mud in the lifting chamber 104. At this time, the mud enters the sampling pipe 403 through the sampling hole 402 and continues to move upwards above the ground under pressure. The one-way valve allows the mud to continue moving upwards.
[0043] The top end of the lifting tube 401 is also provided with a driving component 5, which provides driving force for the up-and-down reciprocating movement of the lifting tube 401. The driving component 5 includes a push plate 501 fixedly connected to the lifting tube 401. A gap is reserved between the push plate 501 and the support plate 3, and a spring 502 is provided in the gap. The spring 502 is sleeved on the lifting tube 401.
[0044] The top surface of the push plate 501 is curved to form a cylindrical surface. An eccentric wheel 503 is provided on the top surface of the push plate 501. The eccentric wheel 503 is supported on the ground by a bracket 505. The surface of the eccentric wheel 503 is in contact with the upper cylindrical surface of the push plate 501. When it rotates, it presses the push plate 501 to make it move up and down periodically.
[0045] It is understandable that when the eccentric wheel 503 rotates to the maximum compression position, the lifting component 4 is in the lowest position. At this time, the spring 502 is compressed, the eccentric wheel 503 continues to rotate, and under the action of the elastic force of the spring 502, the lifting component 4 moves upward. This process is repeated, and the eccentric wheel 503 drives the lifting component 4 to move continuously to extract deep mud.
[0046] As a further preferred embodiment, the eccentric wheel 503 is also provided with a drive shaft 504 on its shaft, through which a handle or a power device is connected to drive it.
[0047] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A sampling device for deep wall slurry of underground continuous wall, characterized in that, include: Sampling bucket (1), support tube (2) and lifting assembly (4); The sampling bucket (1) is provided with a square column-shaped lifting cavity (104). The support pipe (2) is located at the top of the sampling bucket (1), and its top passes through the underground continuous wall to the ground, so that the lifting chamber (104) is connected to the ground. The lifting assembly (4) includes a lifting tube (401), which is hollow and has a sampling hole (402) at the bottom end connected to the lifting cavity (104). The lifting tube (401) moves back and forth along the radial direction of the support tube (2).
2. The underground continuous wall deep retaining mud sampling device according to claim 1, characterized in that, The lifting cavity (104) is surrounded by four inner walls (102), which are vertical plate structures.
3. The underground continuous wall deep retaining mud sampling device according to claim 2, characterized in that, The sampling bucket (1) also includes an outer wall (101), which is formed by an inclined trapezoidal plate. The bottom end of the outer wall (101) is inclined inward so that the sampling bucket (1) has a square platform structure that is larger at the top and smaller at the bottom. The top of the outer wall (101) and the inner wall (102) are provided with a top plate (103) for sealing. The top plate (103) has a through hole in the middle. The support tube (2) is located at the through hole and is connected to the lifting cavity (104) through the through hole.
4. A slurry sampling device for deep retaining wall of underground continuous wall according to any one of claims 1-3, characterized in that, The top end of the support tube (2) is also provided with a support plate (3). Both the support tube (2) and the support plate (3) are rigid components, and the support plate (3) has a central hole.
5. A slurry sampling device for deep retaining walls of underground continuous walls according to claim 4, characterized in that, The lifting tube (401) is located in the support tube (2), with its top end passing through the central hole of the support plate (3) and the other end located in the lifting cavity (104); The lifting tube (401) is also provided with a sampling tube (403), which moves with the lifting tube (401) in the lifting cavity (104), with its top end protruding from the lifting tube (401), and the sampling tube (403) is connected to the sampling hole (402).
6. A slurry sampling device for deep retaining walls of underground continuous walls according to claim 5, characterized in that, The bottom end of the lifting tube (401) is also provided with a lifting plate (404). The lifting plates (404) are used in pairs and are respectively located on both sides of the lifting tube (401). The two are rotatably connected by a lifting shaft (405). The bottom end of the lifting tube (401) is also provided with a baffle (406), which is a V-shaped structure, and the inclined plates on both sides of the baffle provide a limit for the lifting plate (404) on each side.
7. A slurry sampling device for deep retaining walls of underground continuous walls according to claim 6, characterized in that, When both lifting plates (404) on both sides rotate to their maximum extent in the opposite direction, the horizontal straight distance between the front ends of the two lifting plates (404) is the same as the side length of the lifting cavity (104), that is, at this time the front ends of the two lifting plates (404) are in contact with the inner wall (102).
8. A slurry sampling device for deep retaining wall of underground continuous wall according to claim 7, characterized in that, The top end of the riser tube (401) is also provided with a drive assembly (5). The drive assembly (5) includes a push plate (501) fixedly connected to the lifting tube (401). A gap is reserved between the push plate (501) and the support plate (3), and a spring (502) is provided in the gap. The spring (502) is sleeved on the lifting tube (401).
9. A slurry sampling device for deep retaining walls of underground continuous walls according to claim 8, characterized in that, The top surface of the push plate (501) is curved to form a cylindrical surface, and the top surface of the push plate (501) is provided with an eccentric wheel (503), which is mounted on the ground by a bracket (505).
10. A slurry sampling device for deep retaining walls of underground continuous walls according to claim 9, characterized in that, The surface of the eccentric wheel (503) contacts the upper cylindrical surface of the push plate (501), and when it rotates, it presses the push plate (501) to make it move up and down periodically.