A liquid level method double measuring point control mud protection wall cast-in-place pile top elevation device

Abstract

The present application relates to the technical fields of mud pouring, and discloses a liquid level method double-measuring-point control mud wall protection cast-in-place pile top elevation equipment, which comprises a tee pipe, a triangular positioning frame and a feeding hopper, the triangular positioning frame is sleeved at the top of the tee pipe, the top of the tee pipe is connected with the feeding hopper, the bottom of the tee pipe is symmetrically provided with two discharge ends, and the two discharge ends of the tee pipe are both provided with double-measuring-point detection assemblies; most liquid level method elevation equipment on the market only adopts single-measuring-point detection, which is easy to cause elevation misjudgment due to local mud accumulation and liquid level fluctuation in the pile hole; the equipment independently configures detection assemblies through the two discharge ends, the liquid level states of the corresponding measuring points are respectively fed back by the double-sided LED display sheets, the actual pile top elevation can be judged by the consistency of the double-sided signals, the over-pouring or under-pouring problems caused by single-side abnormal signals are avoided, and the equipment is more suitable for the actual working conditions of uneven liquid level in the pile hole in the cast-in-place pile construction.

Description

Technical Field

[0001] This invention relates to the field of mud grouting, specifically to a device for controlling the top elevation of mud wall cast-in-place piles using a dual-point level measurement method. Background Technology

[0002] With social development, there are more and more buildings and structures with cast-in-place pile foundations. Modern buildings generally have basements, or the structural function requires the foundation to be buried at a certain depth. Due to various construction conditions, "empty piles" may occur during the construction of cast-in-place piles, with the top of the pile located several meters or even more than ten meters below the construction working surface.

[0003] In terms of detection methods, most rely on single-point design, which is difficult to handle conditions such as local slurry accumulation and uneven liquid distribution in pile holes. Abnormal signals from a single measuring point can easily lead to misjudgment of elevation, resulting in quality problems such as over-grouting or under-grouting. In terms of structural design, there is a lack of effective buffering and automatic reset mechanisms. The detection slider is often of the hard contact type, which is prone to impact deformation during long-term use. This not only reduces detection accuracy but also requires manual adjustment and reset, extending the preparation time for repetitive operations. It cannot adapt to the high-frequency and fast-paced operation characteristics of construction sites. In terms of anti-clogging function, it is either missing or relies on additional power drive or manual cleaning. The additional power structure is prone to short circuit failure in harsh environments with a lot of mud and high humidity. Manual cleaning requires interruption of operation, which increases maintenance costs and affects construction efficiency. In terms of adaptability to working conditions, there is insufficient flexibility. Pre-setting elevation often requires changing detection components of different lengths, which is cumbersome and time-consuming. It is difficult to quickly match the construction needs of different specifications of piles, resulting in poor versatility.

[0004] Therefore, there is a need to provide a device for controlling the top elevation of mud-wall cast-in-place piles using a dual-point level measurement method, in order to solve the above-mentioned problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a device for controlling the top elevation of mud-wall cast-in-place piles using a dual-point measuring method based on liquid level.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for controlling the top elevation of slurry wall-supported cast-in-place piles using a liquid level method with dual measuring points, comprising a three-way grouting pipe, a triangular positioning frame, and a feeding funnel. The triangular positioning frame is sleeved on the top of the three-way grouting pipe, and the top of the three-way grouting pipe is connected to the feeding funnel. The top of the three-way grouting pipe is configured as the feeding end, and the bottom of the three-way grouting pipe is symmetrically configured with discharge ends. The two discharge ends at the bottom of the three-way grouting pipe are inclined, and both discharge ends of the three-way grouting pipe are equipped with dual measuring point detection components. The dual-point detection assembly includes an upper limit ring, which is fixedly connected to the outside of the bottom outlet end of the three-way grouting pipe. A lower limit ring is provided below the upper limit ring. A sliding cylinder is provided between the upper limit ring and the lower limit ring. Several first return springs are arranged in a ring shape and equidistantly on the top of the sliding cylinder. The top of the first return springs is fixedly connected to the upper limit ring, and the bottom of the first return springs is fixedly connected to the sliding cylinder. Several buffer blocks are fixedly connected in a equidistant distribution on the top of the sliding cylinder.

[0007] Preferably, the dual-point detection component further includes a conductive sheet, which is fixedly connected to the outer wall of the bottom discharge end of the three-way grouting pipe. A trigger sheet is fixedly connected to the inner wall of the slide cylinder, and a first LED display sheet and a second LED display sheet are respectively provided on the triangular positioning frame.

[0008] Preferably, the dual-point detection assembly further includes four L-shaped connecting rods, which are symmetrically fixedly connected to the outer wall of the slide cylinder. Each pair of L-shaped connecting rods forms a group, and a telescopic rod is slidably connected to the bottom of each group of L-shaped connecting rods. A floating block is fixedly connected to the end of each pair of telescopic rods away from the L-shaped connecting rod.

[0009] Preferably, both outlet ends of the three-way grouting pipe are equipped with anti-clogging scraping components. The anti-clogging scraping components include positioning rings, which are fixedly connected to the outside of the outlet ends of the three-way grouting pipe. A second return spring is fixedly connected to the bottom of the positioning ring, and an annular slide is fixedly connected to the end of the second return spring away from the positioning ring. A working groove is opened inside the annular slide.

[0010] Preferably, the anti-clogging scraping assembly further includes a connecting strip, which is fixedly connected to the bottom of the annular sliding blade, and the discharge end of the three-way grouting pipe is slidably connected to the annular scraper, the bottom of which is fixedly connected to the connecting strip.

[0011] Preferably, the lower limiting ring is fixedly connected to the outside of the bottom discharge end of the tee grouting pipe, and the sliding cylinder is slidably connected to the outer wall of the bottom discharge end of the tee grouting pipe.

[0012] Preferably, the buffer block and the first reset spring are staggered.

[0013] Preferably, the conductive sheet is disposed on the movement path of the slide and the trigger sheet, the first LED display sheet and the second LED display sheet are electrically connected to the two sets of conductive sheets respectively, and both trigger sheets are electrically connected to the power supply used by the device.

[0014] Preferably, the annular sliding plate is slidably connected to the outside of the discharge end of the three-way grouting pipe, and the annular sliding plate is sleeved on the outside of the positioning ring and the second return spring.

[0015] Preferably, the middle part of the connecting strip is provided with a diverter plate in an inclined shape.

[0016] The present invention provides a device for controlling the top elevation of slurry wall-supported cast-in-place piles using a dual-point level measurement method. Compared with the prior art, the advantages of the present invention are: Most liquid level elevation devices on the market only use single measuring points for detection, which can easily lead to misjudgment of elevation due to local slurry accumulation and liquid level fluctuations in the pile hole. This device uses independently configured detection components at both discharge ends, with LED displays on both sides reflecting the liquid level status of the corresponding measuring points. Operators can judge the actual pile top elevation by the consistency of the signals from both sides, avoiding over-grouting or under-grouting problems caused by abnormal signals from one side. It is more suitable for the actual working conditions of uneven liquid level in the pile hole during cast-in-place pile construction.

[0017] Most commercially available equipment uses hard-contact sliding blocks, which are prone to deformation due to impact after long-term use, leading to a decrease in detection accuracy. This equipment reduces the contact impact between the slide and the limit ring through elastic rubber buffer blocks, while the first reset spring can automatically push the slide back to its original position without manual adjustment. This not only extends the service life of the parts but also reduces the preparation time for repetitive operations, making it more suitable for the "high-frequency, fast-paced" operation requirements of construction sites.

[0018] This equipment utilizes the fluctuation of the mud's own flow rate to drive the annular scraper to scrape back and forth, requiring no additional power or manual intervention. It can continuously prevent blockage at the discharge end and is suitable for the harsh environment of large mud volume and high humidity during cast-in-place pile construction, reducing on-site maintenance costs and the probability of equipment failure.

[0019] This equipment can quickly match the construction requirements of different pile top elevations through the sliding adjustment of the telescopic rod and L-shaped connecting rod. It can adapt to the operation of different pile types without changing parts, which improves the versatility of the equipment and is more suitable for the grouting operation of multi-specification piles on the construction site. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the overall positional relationship of the device in this invention; Figure 2 This is a cross-sectional view of the overall device in this invention; Figure 3 This is a schematic diagram showing the positional relationship between the three-way grouting pipe, the triangular positioning frame, the first LED display panel, and the second LED display panel in this invention; Figure 4 This is a schematic diagram showing the positional relationship between the upper limit ring, lower limit ring, slide cylinder, and first reset spring in this invention; Figure 5This is a schematic diagram showing the positional relationship between the sliding cylinder, L-shaped connecting rod, telescopic rod, and floating block in this invention; Figure 6 This is a schematic diagram showing the positional relationship between the three-way grouting pipe, the upper limit ring, and the lower limit ring in this invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure at point A in the middle; Figure 8 This is a schematic diagram showing the positional relationship between the upper limit ring, the lower limit ring, and the conductive sheet in this invention; Figure 9 For the present invention Figure 8 Enlarged view of the structure at point B in the middle; Figure 10 This is a schematic diagram showing the positional relationship between the positioning ring, the annular slide, the second return spring, and the connecting strip in this invention.

[0021] Attached reference numerals: 11. T-junction grouting pipe; 12. Triangular positioning frame; 13. Feed funnel; The dual-point detection assembly includes: 21, upper limit ring; 22, lower limit ring; 23, slide cylinder; 24, first reset spring; 25, buffer block; 26, conductive sheet; 27, trigger sheet; 28, L-shaped connecting rod; 29, telescopic rod; 210, float block; 211, first LED display sheet; 212, second LED display sheet; The anti-clogging scraping assembly includes: 31, positioning ring; 32, annular slide; 33, working groove; 34, second return spring; 35, connecting strip; 36, annular scraper. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 merely for explaining the invention and are not intended to limit the invention.

[0023] In the description of this invention, the terms “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0024] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0025] Implementation, for example Figures 1 to 7As shown, an embodiment of the present invention provides a liquid level method dual measuring point control mud wall grouting pile top elevation device, including a three-way grouting pipe 11, a triangular positioning frame 12 and a feeding funnel 13. The triangular positioning frame 12 is sleeved on the top of the three-way grouting pipe 11. The top of the three-way grouting pipe 11 is connected to the feeding funnel 13. The top of the three-way grouting pipe 11 is set as the feeding end. The bottom of the three-way grouting pipe 11 is symmetrically provided with discharge ends. The two discharge ends at the bottom of the three-way grouting pipe 11 are set in an inclined shape, and both discharge ends of the three-way grouting pipe 11 are provided with dual measuring point detection components. The dual-point detection assembly includes an upper limit ring 21, which is fixedly connected to the outside of the bottom discharge end of the three-way grouting pipe 11. A lower limit ring 22 is provided below the upper limit ring 21. A slide cylinder 23 is provided between the upper limit ring 21 and the lower limit ring 22. Several first return springs 24 are arranged in a ring shape and equidistantly on the top of the slide cylinder 23. The top of the first return springs 24 is fixedly connected to the upper limit ring 21, and the bottom of the first return springs 24 is fixedly connected to the slide cylinder 23. Several buffer blocks 25 are fixedly connected in a equidistant manner on the top of the slide cylinder 23.

[0026] The dual-point detection assembly also includes a conductive sheet 26, which is fixedly connected to the outer wall of the bottom discharge end of the three-way grouting pipe 11. A trigger sheet 27 is fixedly connected to the inner wall of the slide cylinder 23. A first LED display sheet 211 and a second LED display sheet 212 are respectively provided on the triangular positioning frame 12.

[0027] The dual-point detection assembly also includes four L-shaped connecting rods 28. The four L-shaped connecting rods 28 are symmetrically fixedly connected to the outer wall of the slide cylinder 23. Each pair of L-shaped connecting rods 28 forms a group. The bottom of each group of L-shaped connecting rods 28 is slidably connected to a telescopic rod 29. The end of each pair of telescopic rods 29 away from the L-shaped connecting rod 28 is fixedly connected to a floating block 210.

[0028] It should be noted that: the lower limit ring 22 is fixedly connected to the outside of the bottom discharge end of the three-way grouting pipe 11, and the slide cylinder 23 is slidably connected to the outer wall of the bottom discharge end of the three-way grouting pipe 11; in the initial state, the lower end of the slide cylinder 23 is in contact with the lower limit ring 22 to ensure that the starting point of the sliding stroke of the slide cylinder 23 is stable. The buffer block 25 and the first return spring 24 are alternately distributed along the top circumference of the slide cylinder 23 (in an alternating arrangement), which can avoid the multiple first return springs 24 from jamming each other when compressed, and at the same time ensure the uniformity of force when the slide cylinder 23 moves upward.

[0029] Conductive plates 26 are positioned along the movement path of the slide cylinder 23 and the trigger plate 27. When the slide cylinder 23 slides along the outer wall of the three-way grouting pipe 11, the trigger plate 27 can precisely contact the conductive plates 26. The first LED display plate 211 and the second LED display plate 212 are electrically connected to the two sets of conductive plates 26 respectively. Both trigger plates 27 are electrically connected to the power supply of the equipment, ensuring that when the slide cylinder 23 is driven to move on one side by the liquid surface, only the LED display plate on the corresponding side will light up due to the circuit conduction. The buffer block 25 is made of elastic rubber. When the slide cylinder 23 moves to the top, the buffer block 25 first contacts the upper limit ring 21, which can effectively reduce the hard contact impact between the slide cylinder 23 and the upper limit ring 21 and extend the service life of the parts.

[0030] The sliding connection between the telescopic rod 29 and the L-shaped connecting rod 28 is marked with scale markings. Operators can quickly locate the extension length of the telescopic rod 29 through the scale markings and accurately match the preset values ​​of different pile top elevations to improve on-site operation efficiency. The floating block 210 is made of hollow rigid foam material, which enhances the synchronicity of the floating block 210 as it rises with the liquid surface and reduces the resistance when the liquid surface rises.

[0031] like Figures 8 to 10 As shown, both discharge ends of the three-way grouting pipe 11 are equipped with anti-clogging scraping components. The anti-clogging scraping components include a positioning ring 31, which is fixedly connected to the outside of the discharge end of the three-way grouting pipe 11. A second return spring 34 is fixedly connected to the bottom of the positioning ring 31. An annular slide 32 is fixedly connected to the end of the second return spring 34 away from the positioning ring 31. A working groove 33 is opened inside the annular slide 32.

[0032] The anti-clogging scraping assembly also includes a connecting strip 35, which is fixedly connected to the bottom of the annular sliding plate 32. The discharge end of the three-way grouting pipe 11 is slidably connected to an annular scraper 36, and the bottom of the annular scraper 36 is fixedly connected to the connecting strip 35.

[0033] It should be noted that the annular sliding plate 32 is slidably connected to the outside of the discharge end of the three-way grouting pipe 11, and the annular sliding plate 32 is sleeved on the outside of the positioning ring 31 and the second return spring 34. This ensures the stability of the annular sliding plate 32 sliding along the axial direction of the discharge end, and also prevents the second return spring 34 from shifting or getting stuck during the extension and retraction process. The middle part of the connecting strip 35 is provided with a diverting plate in an inclined shape. The diverting plate is at a 45-degree angle to the direction of mud flow. It can convert the radial impact force of the mud flow into the driving force along the axial direction of the three-way grouting pipe 11, ensuring that when the mud flow rate fluctuates, the connecting strip 35 can stably drive the annular sliding plate 32 to reciprocate, providing reliable power for the self-cleaning action of the annular scraper 36.

[0034] The inner wall of the annular scraper 36 is equipped with multiple annular scraping teeth, and the scraping teeth are made of wear-resistant polyurethane material, which enhances the scraping effect on the inner wall of the discharge end; ensures smooth sliding and avoids small stones from passing through the gaps and remaining.

[0035] Based on the above embodiments, the following is the complete working process and working principle of the above embodiments: Working principle: Equipment deployment and initial status: The two inclined discharge ends of the three-way grouting pipe 11 are lowered into the pile hole grouting area, and the triangular positioning frame 12 supports and positions the three-way grouting pipe 11. At this time, the slide cylinder 23 is supported by the first return spring 24, and its lower end is in contact with the lower limit ring 22. The trigger plate 27 and the conductive plate 26 are in a separated state. The telescopic rod 29 is adjusted to the preset length along the axis of the L-shaped connecting rod 28 so that the initial height of the floating block 210 matches the preset value of the pile top elevation.

[0036] Mud injection and fluid level driving steps: Slurry is injected into the feed funnel 13. The slurry is diverted through the feed end of the three-way grouting pipe 11 to two inclined discharge ends, flows along the inner wall of the discharge end and falls into the pile hole. As the grouting continues, the slurry level in the pile hole gradually rises. When the slurry level contacts the floating block 210, the buoyancy of the slurry drives the floating block 210 to rise synchronously. The floating block 210 transmits the force to the L-shaped connecting rod 28 through the telescopic rod 29, which in turn drives the slide cylinder 23 to slide upward along the outer wall of the discharge end of the three-way grouting pipe 11.

[0037] During the upward movement of the slide cylinder 23, the buffer block 25 at its top first contacts the upper limit ring 21. The buffer block 25 is made of elastic rubber to reduce the impact of contact. Then the slide cylinder 23 continues to move upward and compresses the first reset spring 24. The elastic force of the first reset spring 24 provides reverse buffer for the slide cylinder 23, preventing the floating block 210 from being falsely triggered by liquid surface fluctuations.

[0038] When the slide cylinder 23 moves, the trigger plate 27 on its inner wall moves synchronously. When the trigger plate 27 contacts the conductive plate 26 on the outer wall of the three-way grouting pipe 11, since the trigger plate 27 is electrically connected to the equipment power supply and the conductive plate 26 is electrically connected to the corresponding LED display plate, the corresponding LED display plate will light up due to the circuit conduction, realizing the visual feedback of "the liquid level on one side has reached the top elevation of the pile".

[0039] Most liquid level elevation equipment on the market only uses single measuring point detection, which is prone to misjudgment of elevation due to local slurry accumulation and liquid level fluctuation in the pile hole. This equipment is equipped with dual measuring point detection components with independent configuration at both discharge ends. The first LED display 211 and the second LED display 212 on both sides respectively reflect the liquid level status of the corresponding measuring point. The operator can judge the actual pile top elevation by the consistency of the signals on both sides, avoiding over-grouting or under-grouting problems caused by abnormal signals on one side. It is more suitable for the actual working conditions of uneven liquid level in the pile hole during the construction of cast-in-place piles.

[0040] Elevation control and equipment reset: When both the first LED display panel 211 and the second LED display panel 212 on both sides are lit, the mud grouting is stopped, and the pile top elevation control is completed. After the grouting operation is completed, the three-way grouting pipe 11 is pulled out of the pile hole. The elastic restoring force of the first reset spring 24 pushes the slide cylinder 23 to slide down along the outer wall of the discharge end until the lower end of the slide cylinder 23 is re-attached to the lower limit ring 22. The trigger plate 27 and the conductive plate 26 are separated, the equipment returns to the initial state, and the next pile top elevation operation can be carried out.

[0041] Most commercially available equipment uses hard-contact sliding blocks, which are prone to deformation due to impact after long-term use, leading to a decrease in detection accuracy. This equipment uses a buffer block 25 made of elastic rubber to reduce the contact impact between the slide cylinder 23 and the upper limit ring 21. At the same time, the first reset spring 24 can automatically push the slide cylinder 23 to reset, eliminating the need for manual adjustment. This not only extends the service life of the parts but also reduces the preparation time for repetitive operations, making it more suitable for the "high-frequency, fast-paced" operation requirements of construction sites.

[0042] Dynamic conversion of mud flow velocity: When the grouting pipe 11 discharges material at the outlet end, the slurry flows along the inner wall of the outlet end and impacts the inclined diverter plate in the middle of the connecting strip 35. As the slurry flow rate is affected by factors such as pumping pressure and pipeline resistance during the grouting process, it is in a dynamic fluctuation state. The impact force generated by the change in flow rate will act on the diverter plate, forming a component force along the axial direction of the grouting pipe 11.

[0043] When the slurry flow rate increases, the impact force overcomes the preload of the second reset spring 34, pushing the connecting bar 35 to drive the annular slide 32 to slide away from the positioning ring 31 along the outer wall of the discharge end of the three-way grouting pipe 11, and the second reset spring 34 is stretched; when the slurry flow rate decreases, the rebound force of the second reset spring 34 pulls the annular slide 32 to reset towards the positioning ring 31.

[0044] During this process, the annular sliding vane 32 reciprocates linearly along the outer wall of the discharge end, and its sliding stroke is determined by the elastic coefficient of the second return spring 34 and the fluctuation amplitude of the mud flow rate. The connecting strip 35 is fixedly connected to the annular scraper 36. Therefore, the reciprocating motion of the annular sliding plate 32 synchronously drives the annular scraper 36 to slide back and forth along the inner wall of the discharge end of the three-way grouting pipe 11, thereby scraping off the mud deposits attached to the inner wall of the discharge end and realizing the self-cleaning and anti-clogging of the discharge end.

[0045] Meanwhile, this mechanism requires no additional power source and fully utilizes the flow rate fluctuations of the mud itself to achieve self-driven scraping, which simplifies the equipment structure and avoids the risk of electrical component failure in humid construction environments. At the same time, the diverter plate can also optimize the mud flow trajectory and reduce the accumulation of sediment caused by local eddies at the discharge end.

[0046] This equipment utilizes the fluctuation of the mud's own flow velocity to drive the annular scraper 36 to reciprocate scraping, requiring no additional power or manual intervention. It can continuously prevent blockage at the discharge end of the three-way grouting pipe 11 and is suitable for the harsh environment of high mud volume and humidity during cast-in-place pile construction, reducing on-site maintenance costs and the probability of equipment failure. This anti-blocking function is achieved by converting the mud power through the inclined diverter plate in the middle of the connecting strip 35, in conjunction with the linkage between the second reset spring 34 and the annular sliding plate 32. The structure is simple and highly reliable.

[0047] This equipment can quickly match the construction requirements of different pile top elevations by sliding adjustment of the telescopic rod 29 and the L-shaped connecting rod 28. It can adapt to the operation of different pile types without changing parts, which improves the versatility of the equipment and is more suitable for the grouting operation of multi-specification piles on the construction site. After adjustment, it is fixed by the locking structure to ensure that the initial height of the floating block 210 accurately matches the preset elevation and ensures the detection accuracy.

[0048] While several embodiments and examples of the present invention have been described for those skilled in the art, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope and spirit of the invention, and are included within the scope of the invention as described in the claims and its equivalents.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for controlling the top elevation of a mud-wall cast-in-place pile using a dual-point level measurement method, comprising a three-way grouting pipe (11), a triangular positioning frame (12), and a feed funnel (13), wherein the triangular positioning frame (12) is sleeved on the top of the three-way grouting pipe (11), and the top of the three-way grouting pipe (11) is connected to the feed funnel (13), characterized in that, The top of the three-way grouting pipe (11) is set as the feed end, and the bottom of the three-way grouting pipe (11) is symmetrically set with the discharge end. The two discharge ends at the bottom of the three-way grouting pipe (11) are set in an inclined position, and both discharge ends of the three-way grouting pipe (11) are equipped with a dual measuring point detection component. The dual-point detection assembly includes an upper limit ring (21), which is fixedly connected to the outside of the bottom discharge end of the three-way grouting pipe (11). A lower limit ring (22) is provided below the upper limit ring (21). A slide cylinder (23) is provided between the upper limit ring (21) and the lower limit ring (22). Several first reset springs (24) are arranged in a ring shape and equidistantly on the top of the slide cylinder (23). The top of the first reset springs (24) is fixedly connected to the upper limit ring (21), and the bottom of the first reset springs (24) is fixedly connected to the slide cylinder (23). Several buffer blocks (25) are fixedly connected in a equidistant distribution on the top of the slide cylinder (23). Both outlet ends of the three-way grouting pipe (11) are equipped with anti-clogging scraping components. The anti-clogging scraping components include a positioning ring (31). The positioning ring (31) is fixedly connected to the outside of the outlet end of the three-way grouting pipe (11). A second return spring (34) is fixedly connected to the bottom of the positioning ring (31). An annular slide (32) is fixedly connected to the end of the second return spring (34) away from the positioning ring (31). A working groove (33) is opened inside the annular slide (32). The anti-clogging scraping assembly also includes a connecting strip (35), which is fixedly connected to the bottom of the annular slide (32). The discharge end of the three-way grouting pipe (11) is slidably connected to an annular scraper (36), and the bottom of the annular scraper (36) is fixedly connected to the connecting strip (35).

2. The equipment for controlling the top elevation of slurry wall cast-in-place piles using a dual-point level measurement method according to claim 1, characterized in that, The dual-point detection component also includes a conductive sheet (26), which is fixedly connected to the outer wall of the bottom discharge end of the three-way grouting pipe (11). A trigger sheet (27) is fixedly connected to the inner wall of the slide cylinder (23). A first LED display sheet (211) and a second LED display sheet (212) are respectively provided on the triangular positioning frame (12).

3. The device for controlling the top elevation of a mud-wall cast-in-place pile using a dual-point level measurement method according to claim 2, characterized in that, The dual-point detection assembly also includes four L-shaped connecting rods (28). The four L-shaped connecting rods (28) are symmetrically fixedly connected to the outer wall of the slide cylinder (23). Each pair of L-shaped connecting rods (28) forms a group. Each group of L-shaped connecting rods (28) has a telescopic rod (29) slidably connected to the bottom. Each pair of telescopic rods (29) has a floating block (210) fixedly connected to the end away from the L-shaped connecting rod (28).

4. The equipment for controlling the top elevation of a mud-wall cast-in-place pile using a dual-point level measurement method according to claim 1, characterized in that, The lower limit ring (22) is fixedly connected to the outside of the bottom discharge end of the three-way grouting pipe (11), and the slide cylinder (23) is slidably connected to the outer wall of the bottom discharge end of the three-way grouting pipe (11).

5. The equipment for controlling the top elevation of slurry wall cast-in-place piles using a dual-point level measurement method according to claim 1, characterized in that, The buffer block (25) and the first reset spring (24) are staggered.

6. The equipment for controlling the top elevation of a mud-wall cast-in-place pile using a dual-point level measurement method according to claim 2, characterized in that, The conductive sheet (26) is arranged on the movement path of the slide (23) and the trigger sheet (27). The first LED display sheet (211) and the second LED display sheet (212) are electrically connected to the two sets of conductive sheets (26) respectively. Both trigger sheets (27) are electrically connected to the power supply used by the device.

7. The equipment for controlling the top elevation of slurry wall cast-in-place piles using a dual-point level measurement method according to claim 1, characterized in that, The annular slide (32) is slidably connected to the outside of the discharge end of the three-way grouting pipe (11), and the annular slide (32) is sleeved on the outside of the positioning ring (31) and the second reset spring (34).

8. The equipment for controlling the top elevation of slurry wall cast-in-place piles using a dual-point level measurement method according to claim 1, characterized in that, The middle part of the connecting strip (35) is provided with a diverter plate in an inclined manner.

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