A cast-in-place pile construction auxiliary device and a cast-in-place pile construction method

Abstract

The application discloses a cast-in-place pile construction auxiliary device and a cast-in-place pile construction method, and relates to the technical field of building construction. On the one hand, the device comprises four pressure transmitters which are sequentially and spacedly arranged from the bottom to the top of a guide pipe and are signal-connected with a controller, so that the pouring of concrete and the lifting of the guide pipe are controlled by acquiring the signals of the four pressure transmitters. On the other hand, the method comprises the following steps: acquiring the pressure difference between a first pressure transmitter and a fourth pressure transmitter; determining an upper limit value of the pressure difference and a lower limit value of the pressure difference based on the set spacing of two adjacent pressure transmitters; and controlling the pouring of concrete and the lifting of the guide pipe according to whether the pressure difference is within the range of the upper limit value of the pressure difference and the lower limit value of the pressure difference. The pressure difference is measured by the pressure transmitters located at two ends, and it is judged whether the pressure difference is within the range of the upper limit value of the pressure difference and the lower limit value of the pressure difference, so that the pouring process of concrete is timely adjusted, and the reliability and construction efficiency during construction are improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to an auxiliary device for cast-in-place pile construction and a method for cast-in-place pile construction. Background Technology

[0002] Reinforced concrete cast-in-place piles are a commonly used form of deep foundation in civil engineering. As a concealed engineering project, they connect the bearing capacity of the foundation to the load of the superstructure, forming a crucial component of buildings and structures and playing a vital role in the quality and safety of the superstructure. The main construction sequence is: positioning – hole drilling – hole cleaning – reinforcement cage hoisting – tremie pipe lowering – underwater concrete pouring. Underwater concrete pouring involves pouring concrete through a vertical pipe, relying on the concrete's own weight. During the pouring process, as concrete is gradually poured along the tremie pipe, the concrete level rises continuously, and the mud in the pile hole is gradually pushed up by the concrete and discharged from the pile hole opening. During the pouring process, the tremie pipe is raised and dismantled as needed as the concrete rises.

[0003] Generally, the bottom of the guide pipe should be buried 2-6 meters below the concrete surface. The burial depth of the guide pipe is one of the key factors in the quality of the pile foundation project during the construction of cast-in-place piles. According to the underwater concrete flow and diffusion law, if the burial depth is too shallow, the guide pipe may be pulled out of the concrete surface when it is pulled up, resulting in mud inclusion in the pile body and pile breakage; if the burial depth is too deep, the overpressure at the bottom of the guide pipe will decrease, and the concrete inside the pipe will not flow out easily, which may cause blockage. Therefore, the burial depth of the guide pipe for cast-in-place piles should be controlled.

[0004] To ensure the appropriate depth of the tremie pipe embedded in the concrete during construction, and to guarantee proper concrete pouring, three methods are typically employed: First, the depth is calculated based on the ratio of concrete pouring volume to the concrete's rise in the hole. Second, the concrete height in the pile hole is continuously checked using a probe rope to calculate the tremie pipe's embedment depth. This process is quite tedious, and even slight negligence can lead to pipe breakage, reinforcement cage floating, or pile breakage. Due to geological conditions, pile holes sometimes collapse or expand in diameter, resulting in inconsistent hole diameters, a phenomenon known as a "bulge." This alters the ratio of concrete pouring volume to the concrete's rise in the hole. If the calculation is still based on a relatively regular ratio, the length of the tremie pipe embedded in the concrete will be overestimated, leading to an excessively long tremie pipe lift, potentially pulling the tremie pipe out of the concrete surface and causing pile breakage. This can result in significant losses or serious engineering accidents, affecting the quality of pile foundation grouting. Summary of the Invention

[0005] In view of the deficiencies in the existing technology, the purpose of this invention is to provide an auxiliary device and a method for constructing cast-in-place piles, so as to solve the problem that the measurement error of the embedment depth of the bottom of the cast-in-place pile guide pipe in the concrete layer is large, resulting in poor concrete pouring quality.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] On the one hand, this application provides an auxiliary device for cast-in-place pile construction, comprising:

[0008] The first pressure transmitter, the second pressure transmitter, the third pressure transmitter, and the fourth pressure transmitter are arranged sequentially at intervals from bottom to top at the bottom of the conduit.

[0009] The controller, which is connected to all the aforementioned pressure transmitters, is used to acquire the first pressure difference between the first and fourth pressure transmitters, and to determine the upper and lower limits of the pressure difference based on the set spacing between two adjacent pressure transmitters. The controller also controls the pouring of concrete and the raising and lowering of the conduit based on whether the pressure difference is within the range of the upper and lower limits of the pressure difference.

[0010] In some optional embodiments, the first pressure transmitter, the second pressure transmitter, the third pressure transmitter and the fourth pressure transmitter are all detachably connected to the conduit via transmitter retaining rings.

[0011] In some optional embodiments, the first pressure transmitter, the second pressure transmitter, the third pressure transmitter and the fourth pressure transmitter are all electrically connected to the controller via wires, and the wires are arranged along the length of the conduit via clamps and connected to the transmitter fixing ring.

[0012] On the other hand, this application also provides a method for constructing cast-in-place piles, which is implemented using the aforementioned auxiliary device for cast-in-place pile construction, and includes the following steps:

[0013] Obtain the first pressure difference between the first pressure transmitter and the fourth pressure transmitter;

[0014] Based on the set spacing between two adjacent pressure transmitters, determine the upper limit and lower limit of the pressure difference;

[0015] The pouring of concrete and the raising and lowering of the duct are controlled based on whether the first pressure difference is within the range of the upper limit and the lower limit of the pressure difference.

[0016] In some optional embodiments, controlling the concrete pouring and the raising and lowering of the duct based on whether the first pressure difference is within the range of the upper and lower limits of the pressure difference includes:

[0017] Determine whether the first pressure difference is within the range of the upper limit and lower limit of the pressure difference;

[0018] If the first pressure difference is greater than the upper limit of the pressure difference, the controller will stop the concrete pouring and pull up the duct.

[0019] If the first pressure difference is less than the lower limit of the pressure difference, the controller controls the conduit to stop being pulled up and continues to pour concrete.

[0020] If the first pressure difference is between the lower limit and the upper limit of the pressure difference, the controller will control the concrete to continue pouring while the height of the duct remains unchanged.

[0021] In some optional embodiments, the aforementioned lower limit of pressure difference is based on B. down =γ S (h2+h3)+γ c h1+(u c +u s ) Determined, where B down γ is the lower limit of the pressure difference. s The mud density of the mud layer, γ c The unit weight of the concrete layer, u c For the error of the pressure transmitter located in the mud layer, u s h1 represents the error of the pressure transmitter being located in the concrete layer, h2 represents the distance between the first and second pressure transmitters, h3 represents the distance between the second and third pressure transmitters, and h4 represents the distance between the third and fourth pressure transmitters.

[0022] In some alternative embodiments, the aforementioned upper limit of pressure difference is based on B. up =γ s h3+γ c (h1+h2)-(u c +u s ) Determined, where B up This represents the upper limit of the pressure difference.

[0023] In some optional embodiments, when the first pressure difference between the first pressure transmitter and the fourth pressure transmitter is between the lower limit of the pressure difference and the upper limit of the pressure difference, the embedment depth of the conduit is determined based on the second pressure difference between the second pressure transmitter and the third pressure transmitter to control the concrete pouring speed.

[0024] In some alternative embodiments, according to Determine the distance between the bottom of the aforementioned conduit and the interface between the concrete and the mud, where H is the distance between the interface between the concrete and the mud and the bottom of the aforementioned conduit, h0 is the distance between the aforementioned first pressure transmitter and the bottom of the aforementioned conduit, P2 is the pressure value measured by the aforementioned second pressure transmitter, and P3 is the pressure value measured by the aforementioned third pressure transmitter.

[0025] In some alternative embodiments, the embedment depth of the conduit is positively correlated with the concrete pouring rate.

[0026] Compared with existing technologies, the advantages of this invention are as follows: by setting four pressure transmitters, the concrete pouring process can be controlled more precisely to improve the quality of concrete pouring; by using pressure transmitters located at both ends to measure the pressure difference and determine whether the pressure difference is within the upper and lower limits of the pressure difference, the concrete pouring process can be adjusted in a timely manner, and the problem of needing multiple people to use probe ropes to confirm the interface height between the concrete layer and the mud layer and the burial depth of the guide pipe is solved. This improves the reliability during construction, makes the control more accurate and convenient, and enables dynamic control during the concrete pouring process, thereby improving construction efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an auxiliary device for cast-in-place pile construction according to the present invention;

[0029] Figure 2 for Figure 1 Schematic diagram of the connection between the medium pressure transmitter and the conduit;

[0030] Figure 3 for Figure 1 Schematic diagram of the connection between the center guide and the conduit;

[0031] Figure 4 for Figure 1 A schematic diagram of the centerline clamp;

[0032] Figure 5 This is a construction flowchart of a method for constructing cast-in-place piles according to the present invention;

[0033] Figure 6 This is a schematic diagram of the controller in a cast-in-place pile construction method according to the present invention.

[0034] In the figure: 1. First pressure transmitter; 2. Second pressure transmitter; 3. Third pressure transmitter; 4. Fourth pressure transmitter; 5. Conduit; 6. Cable clamp; 61. Main body; 62. Through hole; 7. Transmitter retaining ring; 71. Connecting part; 8. Controller; 801. Processor; 802. Memory; 803. Input / output device; 81. Data acquisition system; 9. Wire. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] On the one hand, such as Figure 1 As shown, this application provides an auxiliary device for cast-in-place pile construction, including four pressure transmitters. The four pressure transmitters are arranged sequentially and at intervals from the bottom to the top of the guide pipe 5, and are signal-connected to a controller 8 to control the pouring of concrete and the raising and lowering of the guide pipe 5 by acquiring the signals from the four pressure transmitters. All the pressure transmitters are the first pressure transmitter 1, the second pressure transmitter 2, the third pressure transmitter 3, and the fourth pressure transmitter 4.

[0038] Specifically, during construction, the guide pipe 5 is inserted into the mud and concrete is poured. As the concrete is gradually poured into the guide pipe 5, the concrete level rises continuously. The mud in the pile hole is gradually pushed up by the concrete and discharged from the pile hole. Therefore, as the concrete rises during the pouring process, the guide pipe 5 needs to be raised and disassembled in a timely manner, and the pouring speed of the concrete needs to be controlled to ensure normal concrete pouring.

[0039] It should be noted that the depth of the bottom of the conduit 5 from the depth embedded in the concrete layer should ideally be 2-6m, neither too deep nor too shallow. Therefore, the following distances need to be appropriately set: h0 between the first pressure transmitter 1 and the bottom of the conduit 5; h1 between the first and second pressure transmitters; h2 between the second and third pressure transmitters; and h3 between the third and fourth pressure transmitters. Specifically, the distance between the second pressure transmitter 2 and the bottom of the conduit 5 must be greater than or equal to 2m, and the distance between the third pressure transmitter 3 and the bottom of the conduit 5 must be greater than 6m.

[0040] In this example, the third pressure transmitter 3 is set within a vertical distance of 5.5 to 6 m from the bottom of the conduit 5, the second pressure transmitter 2 is set within a vertical distance of 2 to 2.5 m from the bottom of the conduit 5, the first pressure transmitter 1 is set at a vertical distance of 0.5 m from the bottom of the conduit 5, and the fourth pressure transmitter 4 is set at a vertical distance of more than 8 m from the bottom of the conduit 5.

[0041] The purpose of this setting is to ensure that the burial depth of the conduit 5 is within the set range, and to ensure that the first pressure transmitter 1 is located in the concrete layer and the fourth pressure transmitter 4 is located in the mud layer.

[0042] The second pressure transmitter 2 and the third pressure transmitter 3 are located between the first pressure transmitter 1 and the fourth pressure transmitter 4. The optimal embedment depth of the conduit 5 is determined using the second pressure transmitter 2 and the third pressure transmitter 3. Specifically, the embedment depth of the conduit 5 meets the construction requirements when the interface between the concrete layer and the mud layer is located between the second pressure transmitter 2 and the third pressure transmitter 3. Therefore, the installation positions of the second pressure transmitter 2 and the third pressure transmitter 3 on the conduit 5 are set solely according to the construction requirements.

[0043] It is understandable that during construction, the first pressure transmitter 1 and the fourth pressure transmitter 4 are located in the concrete layer and the mud layer, respectively. If the second pressure transmitter 2 is not in the concrete layer, or the third pressure transmitter 3 is not in the mud layer, then the first pressure difference between the first pressure transmitter 1 and the fourth pressure transmitter 4 will be abnormal, indicating that the conduit 5 is buried too deep or too shallow. At this time, the conduit 5 needs to be moved up or down. When the burial depth of the conduit 5 is adjusted until the second pressure transmitter 2 and the third pressure transmitter 3 are also located in the concrete layer and the mud layer, respectively, it is the optimal construction burial depth.

[0044] For example, if the first pressure difference between the first pressure transmitter 1 and the fourth pressure transmitter 4 is less than the lower limit of the pressure difference, it indicates that the burial depth of the conduit 5 is too shallow, and the controller 8 controls the conduit 5 to stop being pulled up and continues to pour concrete; if the first pressure difference between the first pressure transmitter 1 and the fourth pressure transmitter 4 is greater than the upper limit of the pressure difference, it indicates that the burial depth of the conduit 5 is too deep, and the controller 8 controls the burial of concrete to stop and pulls up the conduit 5; if the first pressure difference between the first pressure transmitter 1 and the fourth pressure transmitter 4 is between the lower limit and the upper limit of the pressure difference, it indicates that the burial depth of the conduit 5 is within a reasonable range, and the controller 8 controls the concrete to continue pouring while the height of the conduit 5 remains unchanged.

[0045] In some alternative embodiments, the pressure transmitter described above is a strain gauge flat diaphragm pressure transmitter.

[0046] Optionally, the first pressure transmitter 1, the second pressure transmitter 2, the third pressure transmitter 3 and the fourth pressure transmitter 4 are all detachably connected to the conduit 5 via the transmitter retaining ring 7.

[0047] To ensure a stable connection between the pressure transmitter and conduit 5, and to avoid inaccurate pressure measurements due to loosening of the pressure transmitter during the upward or downward movement of conduit 5, such as... Figure 2 As shown, each pressure transmitter is detachably connected to the conduit 5 via a transmitter retaining ring 7. This allows for adjustment of the relative positions of each pressure transmitter on the conduit 5 and the spacing between adjacent pressure transmitters according to relevant construction requirements, while also ensuring the stability of the relative positions of each pressure transmitter after it is fixed to the conduit 5.

[0048] In this example, the transmitter retaining ring 7 is an annular clamp, and the main body of the clamp is detachably fixed to the conduit 5 by a nut. An outwardly extending connecting part 71 is provided on one radial side of the clamp's main body, and the pressure transmitter is fixed to the connecting part 71. This spaces the pressure transmitter from the conduit 5, reducing the impact of conduit vibration on the pressure transmitter during concrete pouring and minimizing the pressure sensor's pressure from the concrete exiting the conduit, thus ensuring the pressure sensor's measurement accuracy.

[0049] like Figure 3 As shown, in some optional embodiments, the first pressure transmitter 1, the second pressure transmitter 2, the third pressure transmitter 3 and the fourth pressure transmitter 4 are all electrically connected to the controller 8 via wires 9. The wires 9 are arranged along the length of the conduit 5 via clamps 6 and connected to the transmitter fixing ring.

[0050] In this example, the pressure transmitter and the controller 8 are connected by a wire 9. To avoid the wires from different pressure transmitters becoming scattered and tangled, and to make the use of the wire 9 safer, the wire 9 is fixed with a wire clamp 6. The wire clamp 6 is then fixed on the transmitter retaining ring, thereby fixing the relative position of the pressure transmitter and the conduit 5.

[0051] Furthermore, such as Figure 4 As shown, the wire clamp 6 includes two detachably connected main body parts 61. Each main body part 61 is provided with multiple grooves. When the two main body parts 61 are engaged, the two grooves located at corresponding positions on the two main body parts 61 form a through hole 62. All through holes 62 are arranged radially to secure the wire 9 within the through holes 62.

[0052] Secondly, a method for constructing cast-in-place piles is also provided, which utilizes any of the aforementioned auxiliary devices for cast-in-place pile construction, and includes the following steps:

[0053] S1: Obtain the first pressure difference between the first pressure transmitter 1 and the fourth pressure transmitter 4.

[0054] S2: Determine the upper limit and lower limit of the pressure difference based on the set spacing between two adjacent pressure transmitters.

[0055] Specifically, in some optional embodiments, the lower limit of the pressure difference is based on B. down =γ s (h2+h3)+γ c h1+(u c +u s ) Determined. Among them, B down γ is the lower limit of the pressure difference. s The mud density of the mud layer, γ c The unit weight of the concrete layer, u c For the error of the pressure transmitter located in the mud layer, u s h1 represents the distance between the first pressure transmitter 1 and the second pressure transmitter 2, h2 represents the distance between the second pressure transmitter 2 and the third pressure transmitter 3, and h3 represents the distance between the third pressure transmitter 3 and the fourth pressure transmitter 4.

[0056] In some optional embodiments, the upper limit of the pressure difference is determined according to B. up =γ s h3+γ c (h1+h2)-(u c +u s ) Determined, where B up This represents the upper limit of the pressure difference.

[0057] It is understandable that after the conduit 5 is inserted into the mud layer, the pressure values ​​between the pressure transmitters will differ due to gravity and the density of the mud. Once the conduit 5 is fixed and concrete pouring begins, as the concrete overflows the first pressure transmitter 1, the pressure difference between the pressure transmitters will be determined by the distance between the transmitters and the density of the mud and concrete. As the burial depth of the conduit 5 increases, a larger pressure difference will be measured between the pressure transmitters.

[0058] Therefore, the pressure difference between different pressure transmitters, resulting from the difference in density between mud and concrete, can reflect the burial depth of the conduit 5 and determine the height of the interface between concrete and mud.

[0059] It should be noted that the error caused by the pressure transmitter itself should be considered when the pressure transmitter is in the mud or concrete layer.

[0060] S3: Control the pouring of concrete and the raising and lowering of the guide pipe 5 based on whether the first pressure difference is within the range of the upper limit and lower limit of the pressure difference.

[0061] It is understandable that, since the bottom of the conduit 5 is embedded in the concrete, the embedment depth of the conduit 5 cannot be determined by direct observation. Furthermore, the distance between the interface between the mud and concrete and the bottom of the conduit 5 is related to the concrete pouring. Therefore, in this example, pressure transmitters are arranged at intervals at the bottom of the conduit 5, and the first pressure difference value measured by the fourth pressure transmitter 4 located in the mud layer and the first pressure transmitter 1 located in the concrete layer is compared with the upper limit and lower limit of the pressure difference to determine whether the conduit 5 is within the appropriate embedment depth range.

[0062] In some optional embodiments, step S3 specifically includes:

[0063] Determine whether the first pressure difference is within the range of the upper limit value and the lower limit value of the pressure difference.

[0064] If the first pressure difference is greater than the upper limit of the pressure difference, the controller 8 controls the grouting of concrete to stop and pulls the guide pipe 5 upward; if the first pressure difference is less than the lower limit of the pressure difference, the controller 8 controls the guide pipe 5 to stop pulling upward and continues to grout concrete; if the first pressure difference is between the lower limit of the pressure difference and the upper limit of the pressure difference, the controller 8 controls the grouting of concrete to continue and the height of the guide pipe 5 remains unchanged.

[0065] It is understandable that if the first pressure difference is greater than the upper limit of the aforementioned pressure difference, it indicates that the burial depth of the guide pipe 5 is too deep. If concrete is poured continuously at this point, the excessive pressure at the bottom of the guide pipe 5 will make it difficult for the concrete to flow out, causing blockage. Furthermore, the guide pipe 5 will be difficult to pull up due to the viscosity of the concrete. Therefore, it is necessary to stop pouring concrete and pull up the guide pipe 5. If the first pressure difference is less than the lower limit of the aforementioned pressure difference, it indicates that the burial depth of the guide pipe 5 is too shallow. This can easily cause problems such as mud inclusion in the pile or pile breakage. Therefore, it is necessary to stop pulling up the guide pipe 5 and continue pouring concrete. If the first pressure difference is between the lower limit and the upper limit of the aforementioned pressure difference, it indicates that the burial depth of the guide pipe 5 meets the construction requirements. In this case, concrete can be poured at this burial location.

[0066] It should be noted that, since concrete pouring is a continuous process, the interface between concrete and slurry is constantly changing. Therefore, when controlling the concrete pouring and the raising and lowering of the guide pipe 5, the controller 8 needs to continuously adjust the height of the guide pipe 5 and the start and stop of concrete pouring within the three states mentioned above. For example, when the first pressure difference is between the lower limit and the upper limit of the pressure difference, the controller 8 controls the concrete to continue pouring while keeping the height of the guide pipe 5 unchanged until the first pressure difference is greater than the upper limit. At this point, the concrete pouring needs to be stopped, and preparations need to be made to pull up the guide pipe 5. If the guide pipe 5 is pulled up too much and the first pressure difference is less than the lower limit, then the pulling up of the guide pipe 5 needs to be stopped, and preparations need to begin pouring concrete.

[0067] Therefore, it is understandable that the entire concrete pouring process is generally carried out in a multi-stage operation. That is, as the concrete is poured, the tremie pipe will be lowered (the position of the tremie pipe opening will be lowered) or raised (the position of the tremie pipe opening will be raised) before continuing the next stage of concrete pouring.

[0068] The controller 8 is generally a device that can be configured at the construction site, that is, at the work site where the dry columnar guide pipe is located. In addition, the controller 8 is not only the execution device of the cast-in-place pile construction method of this application, but also may participate in other data processing tasks or control tasks of corresponding machines on site.

[0069] In some optional embodiments, the above construction steps further include S4: when the first pressure difference between the first pressure transmitter 1 and the fourth pressure transmitter 4 is between the lower limit of the pressure difference and the upper limit of the pressure difference, the embedment depth of the conduit 5 is determined according to the second pressure difference between the second pressure transmitter 2 and the third pressure transmitter 3 to control the concrete pouring speed.

[0070] In some optional embodiments, step S4 above includes:

[0071] S41: According to Determine the distance between the bottom of the aforementioned conduit 5 and the interface between the concrete and the mud, where H is the distance between the interface between the concrete and the mud and the bottom of the aforementioned conduit 5, h0 is the distance between the aforementioned first pressure transmitter 1 and the bottom of the aforementioned conduit 5, P2 is the pressure value measured by the aforementioned second pressure transmitter 2, and P3 is the pressure value measured by the aforementioned third pressure transmitter 3.

[0072] Understandable. To account for the error in the burial depth of the conduit, considering that different pressure transmitters will produce errors due to different media when measured within the mud and concrete layers, it is necessary to consider the error in the burial depth of conduit 5 caused by the pressure transmitter error value in order to improve measurement accuracy. Here, the distance between the bottom of conduit 5 and the interface between the concrete and mud is the burial depth of conduit 5 in this art. Therefore, if those skilled in the art need to obtain the burial depth of the conduit, they can use the method of the above embodiment to process the collected data through the processing module.

[0073] S42: The controller 8 obtains the pressure values ​​from the second pressure transmitter 2 and the third pressure transmitter 3, and calculates the burial depth of the conduit based on the vertical distance between adjacent transmitters. This determines the amount of concrete that still needs to be poured. The controller 8 can then control the continued pouring of this amount of concrete and control the pouring speed of the concrete based on the burial depth of the conduit.

[0074] In some alternative embodiments, the embedment depth of the conduit 5 is positively correlated with the concrete pouring rate.

[0075] It is understandable that the hardware structure of controller 8 itself can be involved in concrete delivery, thus controller 8 can autonomously control the pouring of concrete into the duct. Alternatively, the pouring of concrete into the duct may be performed by a device other than controller 8, and controller 8 can interact with or directly control that device to prompt it to continue pouring the currently calculated amount of concrete.

[0076] The concrete pouring speed can be higher than the usual fixed pouring speed (the existing pouring speed or the fixed pouring speed controlled in actual operation) in the initial stage, and lower than the usual fixed pouring speed in the later stage.

[0077] Specifically, the adjustment of the concrete pouring speed here can also include two aspects.

[0078] The first method is to adjust the size of the grouting opening used for pouring concrete.

[0079] That is, the controller 8 adjusts the size of the pouring opening for pouring concrete into the conduit 5 based on the distance between the concrete-slurry interface and the bottom of the conduit 5, so as to adjust the pouring speed of the concrete.

[0080] It's easy to understand that the larger the infusion opening, the greater the infusion rate; conversely, the smaller the infusion opening, the lower the infusion rate.

[0081] For the grouting opening, a mechanical component that can dynamically adjust its position, such as a baffle plate that can adjust the amount of obstruction, can be configured to adjust the size of the opening that allows concrete to flow through.

[0082] The second method involves adjusting the number of grouting openings used for pouring concrete.

[0083] That is, the controller 8 adjusts the number of injection openings for pouring concrete into the conduit 5 based on the distance between the concrete and mud interface and the bottom of the conduit 5, so as to adjust the concrete pouring speed.

[0084] Obviously, compared to adjusting the concrete pouring speed by dynamically adjusting mechanical components such as baffles, directly adjusting the number of pouring openings with a fixed pouring speed offers a simpler approach in terms of data processing and mechanical component control, making it both simple and practical.

[0085] It is understandable that in practical applications, those skilled in the art usually adjust the flow rate, i.e. the concrete pouring speed, by controlling the size of the pouring opening. However, this application introduces the method of adjusting the number of pouring openings with a fixed size to adjust the concrete pouring speed. This is not only not easy to come up with, but also has significantly improved stability in terms of the adjustment effect on the pouring speed.

[0086] Furthermore, in some optional embodiments, the distance between the concrete-slurry interface and the bottom of the guide pipe 5 obtained by the solution, as well as the concrete characteristics of the concrete currently used, can be input into the grouting speed processing model so that the model can process and obtain the corresponding grouting speed.

[0087] The concrete pouring speed output by the model can be indicated by the speed data of the foundation, or by indirect indicators such as the size or number of pouring openings mentioned above. The specific method can be adjusted according to actual needs.

[0088] In some optional embodiments, when the distance H between the concrete-slurry interface and the bottom of the conduit 5 reaches a preset height h0+h1+h2, the controller 8 controls the concrete pouring to stop.

[0089] It is understandable that when the distance H between the concrete and mud interface and the bottom of the guide pipe 5 reaches the preset height h0+h1+h2, it means that if the pouring continues, the first pressure difference between the first pressure transmitter 1 and the fourth pressure transmitter 4 will be greater than the above-mentioned upper limit of pressure difference. Therefore, it is necessary to stop pouring concrete and prepare to pull up the guide pipe 5.

[0090] This application also provides a controller 8 from a hardware structure perspective, such as Figure 6 As shown.

[0091] Specifically, the controller 8 of this application may include a processor 801, a memory 802, and an input / output device 803. The processor 801, when executing a computer program stored in the memory 802, implements, for example... Figure 1 The steps of the method in the corresponding embodiment; or, when the processor 801 executes the computer program stored in the memory 802, it implements as follows: Figure 5 Corresponding to the functions of each unit in the embodiment, the memory 802 is used to store the functions executed by the processor 801 as described above. Figure 5 The computer program required for the method in the corresponding embodiment.

[0092] It is understandable that each pressure transmitter transmits the collected information to the data acquisition system 81, and then transmits the various information to the processor 801 of the controller 8 for processing.

[0093] The controller 8 may include, but is not limited to, a processor 801, a memory 802, and an input / output device 803. Those skilled in the art will understand that the illustrations are merely examples of the processing device and do not constitute a limitation on the processing device. It may include more or fewer components than illustrated, or combine certain components, or different components. For example, the processing device may also include network access devices, buses, etc., and the processor 801, memory 802, input / output device 803, etc., are connected via a bus.

[0094] This invention discloses an auxiliary device and method for constructing cast-in-place piles. By installing four pressure transmitters spaced along the length of the guide pipe at its bottom end, and processing the pressure values ​​measured by these transmitters through a processor within a controller, the device controls the depth of the guide pipe and the concrete pouring process. This allows for precise control of the concrete pouring process and improves efficiency. By measuring the pressure difference using the transmitters at both ends and determining whether this difference falls between its upper and lower limits, the device allows for timely adjustments to the concrete pouring process and eliminates the need to confirm the interface height between the concrete and mud layers and the depth of the guide pipe. When the guide pipe's depth is within the optimal range, the pouring speed is controlled based on the distance between the bottom of the guide pipe and the interface between the concrete and mud layers, ensuring optimal construction requirements are met. Furthermore, considering the error values ​​of each pressure transmitter within the concrete and mud layers, the processing results are highly reliable, providing reliable and effective data guidance for construction sites.

[0095] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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 application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0096] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0097] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An auxiliary device for cast-in-place pile construction, characterized in that, include: The first pressure transmitter (1), the second pressure transmitter (2), the third pressure transmitter (3) and the fourth pressure transmitter (4) are arranged sequentially from bottom to top at the bottom of the conduit (5). The controller (8), which is connected to all the pressure transmitters, is used to obtain the first pressure difference between the first pressure transmitter (1) and the fourth pressure transmitter (4), and to determine the upper limit and lower limit of the pressure difference based on the set distance between two adjacent pressure transmitters, and to control the pouring of concrete and the raising and lowering of the conduit (5) according to whether the pressure difference is within the range of the upper limit and lower limit of the pressure difference; The lower limit of the pressure difference is based on Confirmed, among which This is the lower limit of the pressure difference. The density of the mud layer. The unit weight of the concrete layer. This is for the error caused by the pressure transmitter being located in the mud layer. This is for the error caused by the pressure transmitter being located in the concrete layer. The distance between the first pressure transmitter (1) and the second pressure transmitter (2) is... The distance between the second pressure transmitter (2) and the third pressure transmitter (3) is... The distance between the third pressure transmitter (3) and the fourth pressure transmitter (4); The upper limit of the pressure difference is based on Confirmed, among which This represents the upper limit of the pressure difference.

2. The auxiliary device for cast-in-place pile construction as described in claim 1, characterized in that, The first pressure transmitter (1), the second pressure transmitter (2), the third pressure transmitter (3) and the fourth pressure transmitter (4) are all detachably connected to the conduit (5) through the transmitter fixing ring (7).

3. The auxiliary device for cast-in-place pile construction as described in claim 2, characterized in that, The first pressure transmitter (1), the second pressure transmitter (2), the third pressure transmitter (3) and the fourth pressure transmitter (4) are all electrically connected to the controller (8) through wires (9). The wires (9) are arranged along the length of the conduit (5) through wire clamps (6) and connected to the transmitter fixing ring.

4. A method for constructing cast-in-place piles, characterized in that, The construction of cast-in-place piles using the auxiliary device described in any one of claims 1-3 includes the following steps: Obtain the first pressure difference between the first pressure transmitter (1) and the fourth pressure transmitter (4); Based on the set spacing between two adjacent pressure transmitters, determine the upper limit and lower limit of the pressure difference; The pouring of concrete and the raising and lowering of the conduit (5) are controlled based on whether the first pressure difference is within the range of the upper limit and the lower limit of the pressure difference.

5. The method for constructing cast-in-place piles as described in claim 4, characterized in that, The method of controlling the concrete pouring and the raising and lowering of the duct (5) based on whether the first pressure difference is within the range of the upper limit and the lower limit of the pressure difference includes: Determine whether the first pressure difference is within the range of the upper limit value and the lower limit value of the pressure difference; If the first pressure difference is greater than the upper limit of the pressure difference, the controller (8) controls the grouting of concrete to stop and pulls up the guide pipe (5). If the first pressure difference is less than the lower limit of the pressure difference, the controller (8) controls the conduit (5) to stop pulling upward and continue pouring concrete; If the first pressure difference is between the lower limit of the pressure difference and the upper limit of the pressure difference, the controller (8) controls the concrete to continue pouring and the height of the conduit (5) remains unchanged.

6. The method for constructing cast-in-place piles as described in claim 5, characterized in that, When the first pressure difference between the first pressure transmitter (1) and the fourth pressure transmitter (4) is between the lower limit of the pressure difference and the upper limit of the pressure difference, the embedment depth of the conduit (5) is determined based on the second pressure difference between the second pressure transmitter (2) and the third pressure transmitter (3) to control the concrete pouring speed.

7. The method for constructing cast-in-place piles as described in claim 6, characterized in that, according to The distance between the bottom of the conduit (5) and the interface between the concrete and the mud is determined, where H is the distance between the interface between the concrete and the mud and the bottom of the conduit (5). The distance between the first pressure transmitter (1) and the bottom of the conduit (5) is [missing information]. The pressure value measured by the second pressure transmitter (2) is... The pressure value measured by the third pressure transmitter (3).

8. The method for constructing cast-in-place piles as described in claim 6, characterized in that, The embedment depth of the conduit (5) is positively correlated with the concrete pouring speed.

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