Pile top elevation detection device and detection method

Abstract

The invention discloses a pile top elevation detection device and a detection method of the pile top elevation detection device. The pile top elevation detection device is characterized in that a first sealing cavity is defined in a penetrating head, a counter weight is arranged in the first sealing cavity, and a connecting frame is arranged at the top of the penetrating head; the sampling barrel is located above the penetrating head, the sampling barrel is connected with the connecting frame in an up-down sliding mode, and the sampling barrel is provided with a floating part; the limiting part is connected with the sampling barrel, is arranged close to the penetrating head and is used for abutting against the connecting frame; the measuring rope is connected with the connecting frame and is used for measuring the elevation of the concrete layer; the fixed pulley is rotationally connected with the connecting frame and is vertically arranged; the lifting rope is connected with the sampling barrel after bypassing the radial outer surface of the fixed pulley. According to the invention, the large deviation between the actual elevation value and the actual elevation value of the concrete layer can be avoided, so that the detection result is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of pile foundation construction equipment, and in particular to a pile top elevation detection device and a detection method. Background Art

[0002] Mud-wall bored piles are formed by pouring concrete underwater into the pile hole.

[0003] When pouring concrete, a conduit is inserted into the pile hole to pour concrete. The concrete flows out from the bottom of the pile through the conduit. Since there is a small amount of sediment and mud at the bottom of the pile hole, the small amount of sediment at the bottom of the pile and the mud in the pile body can be displaced upward. After a period of concrete pouring, obvious stratification gradually appears in the pile hole, which is the wall mud layer, floating slurry layer and concrete layer from top to bottom. Therefore, detection tools are needed to detect the elevation of the concrete pouring surface on the top of the pile to ensure that the elevation of the pile top meets the requirements.

[0004] In the relevant detection technology, an automatic measuring tool for pile head overfilling (CN210981087 U) and a sediment sampling device for bored piles (CN217180005 U) are disclosed. Both tools require the probe rod to be connected to an extension rod. The probe rod is provided with a sampling bucket. The probe rod is inserted into the pile hole to scoop concrete through the sampling bucket to determine the elevation of the concrete pouring surface.

[0005] However, the above-mentioned measuring tool needs to fish out concrete multiple times to determine the elevation of the concrete surface, which makes the detection operation extremely inconvenient. In addition, it is easy for a large deviation between the measured value and the true value of the elevation of the concrete layer in the pile hole to occur, making the detection result inaccurate and easily leading to the problem of insufficient or excessive concrete pouring. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a pile top elevation detection device, which can avoid a large deviation between the actual measured value and the true value of the concrete layer elevation, making the detection result more accurate and ensuring that the elevation of the pile column meets the required range.

[0007] The present invention also provides a detection method having the above-mentioned pile top elevation detection device.

[0008] According to a first aspect of the present invention, a pile top elevation detection device comprises: a penetration head, which is used to sink into concrete, a first sealed cavity is defined inside the penetration head, a counterweight is installed inside the first sealed cavity, and a connecting frame is arranged on the top of the penetration head; a sampling barrel, which is located above the penetration head, and the sampling barrel is slidably connected to the connecting frame up and down, and the sampling barrel is provided with a floating part, when the penetration head sinks into the concrete layer, the floating part drives the sampling barrel to move in a direction away from the penetration head, so that a feeding channel is formed between the bottom of the sampling barrel and the top of the penetration head; a limiting part, which is connected to the sampling barrel, and the limiting part is close to the sampling barrel. The penetration head is provided, and the limit portion is used to abut the connecting frame to prevent the sampling barrel from moving in a direction away from the penetration head; a measuring rope, the measuring rope is connected to the connecting frame, and the measuring rope is used to measure the elevation of the concrete layer; a fixed pulley, the fixed pulley is rotatably connected to the connecting frame, and the fixed pulley is vertically arranged; a lifting rope, the lifting rope is connected to the sampling barrel after passing around the radial outer surface of the fixed pulley, and when the lifting rope is pulled upward, the sampling barrel moves close to the penetration head, so that a accommodating cavity is formed between the inner wall of the sampling barrel and the top of the penetration head, and the accommodating cavity is loaded with concrete, so that the sampling barrel and the penetration head are lifted upward synchronously.

[0009] A pile top elevation detection device according to an embodiment of the present invention has at least the following beneficial effects: 1. The present invention sets a penetration head, defines a first sealed cavity inside the penetration head, and loads a certain amount of counterweights into the first sealed cavity, so that the penetration head can sink into the concrete layer. The penetration head drives the sampling tube to sink into the concrete layer, ensuring that the sampling tube extracts concrete, thereby solving the problem of inconvenient operation of extending the probe rod when extracting concrete, and solving the problem of needing to take samples for multiple times for testing.

[0010] 2. The present invention provides a sampling tube and a measuring rope so that the sampling tube is provided with a floating part. When the sampling tube sinks into the concrete layer, the floating part can drive the sampling tube to float up. At this time, the sampling tube and the connecting frame slide up and down relatively until the limiting part abuts against the connecting frame. The sampling tube prevents the penetration head from sinking. The sampling tube and the penetration head are suspended in the concrete layer. The sampling tube and the penetration head are just at the elevation position of the concrete layer. The elevation of the concrete layer can be calculated according to the length of the measuring rope released, which is convenient for calculating the last concrete pouring amount, ensuring that the elevation of the pile column meets the requirements, so that the actual measured value of the elevation of the concrete layer is as close to the true value of the elevation of the concrete layer as possible, and the detection result is more accurate.

[0011] 3. The present invention sets a fixed pulley and a lifting rope. When extracting concrete, the lifting rope is pulled upward. After the lifting rope passes through the fixed pulley and turns, the lifting rope and the fixed pulley cooperate to drive the sampling tube to move close to the penetration head. The sampling tube and the penetration head cooperate to surround the concrete, so that the concrete is located in the accommodating cavity. The lifting rope is continued to be pulled, and the sampling tube and the penetration head are lifted upward synchronously, thereby ensuring that the extracted sample is concrete.

[0012] According to a pile top elevation detection device of an embodiment of the first aspect of the present invention, the floating portion is a second sealed cavity, and the second sealed cavity is arranged in a ring shape along the circumference of the sampling tube.

[0013] According to a pile top elevation detection device of an embodiment of the first aspect of the present invention, the penetration head is a conical structure, and the diameter of the penetration head is gradually reduced in a direction away from the sampling tube.

[0014] According to a pile top elevation detection device of an embodiment of the first aspect of the present invention, the top of the penetration head has a spherical surface, and the bottom of the sampling tube has a contact surface that matches the spherical surface.

[0015] According to a pile top elevation detection device of an embodiment of the first aspect of the present invention, the bottom of the penetration head has an inlet and outlet communicated with the first sealing cavity and a plugging member for sealing the inlet and outlet, and the inlet and outlet accommodate the counterweight to pass through.

[0016] According to a pile top elevation detection device of an embodiment of the first aspect of the present invention, the connecting frame has a vertical pole located in the sampling tube, the bottom end of the vertical pole is coaxially connected to the penetration head, and the top end of the vertical pole is connected to the measuring rope.

[0017] According to a pile top elevation detection device of an embodiment of the first aspect of the present invention, the connecting frame has at least two horizontal rods, at least two of the horizontal rods are distributed along the horizontal periphery of the vertical rods, the horizontal rods are connected to the vertical rods, at least two of the horizontal rods are connected to support rods, and the fixed pulley is arranged on the support rods.

[0018] According to a pile top elevation detection device of an embodiment of the first aspect of the present invention, a guide groove and a sliding portion for sliding are provided between the horizontal rod and the inner wall of the sampling tube, and the guide groove extends in the up-down direction.

[0019] A pile top elevation detection device according to an embodiment of the first aspect of the present invention further includes a bracket, and a winding drum rotatably disposed on the bracket, the measuring rope is wound on the winding drum, the winding drum has a rotating shaft, and a counter is installed on the rotating shaft.

[0020] A detection method according to a second aspect of an embodiment of the present invention comprises a pile top elevation detection device as described in any one of the above, characterized in that the detection method comprises the following steps: Concrete density test, test the density of prefabricated concrete at the construction site to obtain accurate data. The actual measured density of concrete is ; Making a sampling mechanism, making a sampling mechanism with the same density as concrete, the sampling mechanism consists of a penetration component and a sampling tube, the penetration component consists of the penetration head, the connecting frame, a counterweight, and the fixed pulley, firstly, weighing the penetration head, the sampling tube, a single counterweight, the fixed pulley, and the connecting frame respectively to obtain the corresponding mass, and calculating the volume of the penetration head, the sampling tube, a single counterweight, the fixed pulley, and the connecting frame respectively to obtain the corresponding volume; According to the density calculation formula , is density, m is mass, V is volume, and the density of the sampling tube is , the density of the through-head is , the density of a single weight is , the density of the fixed pulley is , the density of the connecting frame is , the density of the penetration component is , the density of the sampling mechanism is , n is the number of the weights, where , , ; Find the number n of the counterweights, according to , we can construct the equation: , and we can solve , assembling the penetration head, the fixed pulley, the connecting frame and n counterweights to form a penetration assembly, and assembling the penetration assembly and the sampling tube to form the sampling mechanism; The measuring rope and the lifting rope are prepared, the bracket is installed above the pile hole, a winding drum is arranged on the bracket, a counter is installed on the rotating shaft of the winding drum, the measuring rope is wound around the winding drum, the measuring rope is connected to the connecting frame, the displayed value of the counter is reset to zero, the lifting rope is connected to the top of the sampling tube, and is passed around the fixed pulley; Concrete sampling, rotating the winding drum, releasing the measuring rope, placing the sampling mechanism into the pile hole, observing the state of the measuring rope at the pile hole mouth, the measuring rope is in a taut state under the gravity of the penetration assembly, indicating that the penetration head is in the process of sinking. The penetration head can sink into the concrete layer. When the penetration head enters the concrete layer, The sampling tube floats up under the buoyancy of the concrete, and the sampling tube and the connecting frame slide relative to each other. Then, the sampling tube abuts against the connecting frame through the limiting portion to prevent the penetration head from sinking. , the measuring rope is in a relaxed state, indicating that the sampling mechanism is suspended in the concrete layer. The sampling mechanism is at the elevation of the concrete layer in the pile hole. The number of turns a of the winding drum displayed by the counter can be recorded. According to the circumference of the winding drum c, the length of the measuring rope released by the winding drum can be obtained. ; Concrete lifting, the lifting rope is pulled up on the pile hole, and after the lifting rope is turned by the fixed pulley, it can drive the sampling tube to move downward, so that a receiving cavity is formed between the inner wall of the sampling tube and the top of the penetration head, and the receiving cavity is loaded with concrete, so that the sampling tube and the penetration head are lifted upward synchronously to complete the sampling work; Concrete testing: checking the concrete sample obtained. If there is a concrete sample in the sampling assembly, it indicates that the sampling is completed. Otherwise, re-measure the density of the concrete and adjust the number of the weights in the first sealed cavity so that the density of the sampling mechanism matches the density of the concrete, and then re-sample the concrete; Concrete calculation, based on the initial elevation of the sampling mechanism at the pile hole , the length of the measuring rope released by the winding drum , the elevation of the concrete layer in the pile hole can be calculated .

[0021] A detection method according to an embodiment of the present invention has at least the following beneficial effects: The present invention manufactures a sampling mechanism with the same density as that of concrete. The sampling mechanism consists of a penetration component and a sampling tube. The density of the penetration component is greater than that of concrete, and the density of the sampling tube is less than that of concrete. The penetration component can sink into the concrete layer in the pile hole, so that the penetration component drives the sampling tube to sink into the concrete layer. Since the density of the sampling mechanism is the same as that of the concrete, the sampling mechanism is suspended in the concrete layer. The sampling mechanism is at the elevation position of the concrete layer, and the elevation of the concrete layer can be measured more accurately, which is convenient for calculating the subsequent concrete pouring amount. In addition, by adjusting the number of counterweights in the first sealed cavity in the penetration head, the density of the penetration component is greater than that of the concrete, and the density of the sampling mechanism can be made as close to the density of the concrete as possible, thereby ensuring that the measured value of the elevation of the concrete layer is closer to the true value of the elevation of the concrete layer.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a pile top elevation detection device and detection method according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of the sampling tube and the penetration head of a pile top elevation detection device and detection method is shown; Figure 3 for Figure 1 A schematic diagram of the structure of a winding drum of a pile top elevation detection device and detection method is shown; Figure 4 for Figure 1 A schematic diagram of the structure of a sampling mechanism of a pile top elevation detection device and detection method is shown; Figure 5 for Figure 1 A schematic structural diagram of a sampling mechanism of a pile top elevation detection device and detection method for detecting the elevation of a pile hole concrete layer is shown.

[0025] Figure numerals: 100-penetrating head, 110-first sealed chamber, 120-counterweight, 130-connecting frame, 140-sampling tube, 150-feeding channel, 160-limiting part, 170-measuring rope, 180-fixed pulley, 190-lifting rope, 200-accommodating chamber, 210-second sealed chamber, 220-spherical surface, 230-contact surface, 240-blocking piece, 250-vertical pole, 260-horizontal pole, 270-support pole, 280-guide groove, 290-bracket, 300-winding reel, 310-rotating shaft, 320-counter, 330-mud layer, 340-floating slurry layer, 360-concrete layer, 370-penetrating component, 380-sampling mechanism. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it is necessary to understand that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of first and second, this is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation, connection and connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] A pile top elevation detection device and detection method according to an embodiment of the present invention are described below with reference to the accompanying drawings.

[0031] The present invention aims to provide an embodiment of a pile top elevation detection device and a detection method.

[0032] When pouring concrete in the pile hole, a guide tube is inserted into the pile hole to pour concrete. After each time the guide tube is pulled up, the elevation of the top surface of the concrete pouring must be measured, especially the effective elevation of the finished concrete surface on the pile top must be controlled.

[0033] As concrete flows out from the bottom of the pile through the conduit, a small amount of sediment at the bottom of the pile and the mud in the pile body will flow upward and displace it. After a period of concrete pouring, obvious stratification gradually appears in the pile hole, from top to bottom: The wall protection slurry layer 330 has a density between 1.05 and 1.45 g / cm3; The floating slurry layer 340 includes a mixture of cement slurry, pile bottom sediment and mud sediment, and has a density between 1.5 and 2.0 g / cm3; The poured concrete layer 360 has a density between 2.35 and 2.45 g / cm3.

[0034] When the pile top elevation is detected, the wall protection mud layer 330 and the floating slurry layer 340 will affect the detection result.

[0035] To this end, the present invention proposes a pile top elevation detection device, referring to Figure 5 It can sink into the wall protection mud layer 330, the floating slurry layer 340 and the concrete layer 360 in turn, extract concrete samples, detect the elevation of the concrete layer 360, and avoid a large deviation between the measured value and the true value of the elevation of the concrete layer 360, so that the detection result is more accurate and ensures that the elevation of the pile column meets the required range.

[0036] A pile top elevation detection device according to an embodiment of the present invention, referring to Figure 1 , including a penetration head 100, a sampling tube 140, a limiting portion 160 and a measuring rope 170, the penetration head is used to sink into concrete, a first sealed cavity 110 is defined inside the penetration head 100, a counterweight 120 is installed inside the first sealed cavity 110, a connecting frame 130 is arranged on the top of the penetration head 100, the sampling tube 140 is located above the penetration head 100, the sampling tube 140 is connected to the connecting frame 130 for vertical sliding connection, the sampling tube 140 is provided with a floating portion, when the penetration head 100 sinks into the concrete layer 360, the floating portion drives the sampling tube 140 to move in a direction away from the penetration head 100, so that a feeding channel 150 is formed between the bottom of the sampling tube 140 and the top of the penetration head 100, the measuring rope 170 is connected to the connecting frame 130, and the measuring rope 170 is used to measure the elevation of the concrete layer.

[0037] It can be understood that by providing the penetration head 100, a first sealed cavity 110 is defined inside the penetration head 100, and the first sealed cavity 110 is arranged along the outer shape of the penetration head 100. A certain number of counterweights 120 are loaded into the first sealed cavity 110, so that the penetration head 100 can sink into the concrete layer 360, and the penetration head 100 drives the sampling tube 140 to sink into the concrete layer 360, ensuring that the sampling tube 140 extracts concrete, thereby solving the problem of the inconvenience of extending the probe rod when extracting concrete, and solving the problem of needing to take samples for multiple times for testing.

[0038] Preferably, the counterweight 120 is a smaller steel ball, which is loaded into the first sealed cavity 110 so that the first sealed cavity 110 can load more steel balls. At the same time, the steel balls are more easily evenly distributed in the first sealed cavity 110, so that the penetration head 100 remains stable during the process of sinking into the concrete layer 360.

[0039] In addition, by providing the sampling tube 140 and the measuring rope 170, the sampling tube 140 is provided with a floating portion. When the sampling tube 140 sinks into the concrete layer 360, the floating portion can drive the sampling tube 140 to float. At this time, the sampling tube 140 and the connecting frame 130 slide up and down relatively until the limiting portion 160 abuts against the connecting frame 130. The sampling tube 140 prevents the penetration head 100 from sinking. The sampling tube 140 and the penetration head 100 are suspended in the concrete layer 360. The sampling tube 140 and the penetration head 100 are just at the elevation position of the concrete layer 360. The elevation of the concrete layer 360 can be calculated according to the length of the measuring rope 170 released, which is convenient for calculating the last concrete pouring amount, ensuring that the elevation of the pile column meets the requirements, so that the actual measured value of the elevation of the concrete layer 360 is as close to the true value of the elevation of the concrete layer 360 as possible, and the detection result is more accurate.

[0040] A pile top elevation detection device according to an embodiment of the present invention, referring to Figure 1 and Figure 2 , and also includes a fixed pulley 180 and a lifting rope 190. The fixed pulley 180 is rotatably connected to the connecting frame 130, and the fixed pulley 180 is arranged upright; the lifting rope 190, the lifting rope 190 passes around the radial outer surface of the fixed pulley 180 and is connected to the sampling barrel 140. When the lifting rope 190 is pulled upward, the sampling barrel 140 moves close to the penetration head 100, so that a receiving chamber 200 is formed between the inner wall of the sampling barrel 140 and the top of the penetration head 100, and the receiving chamber 200 is loaded with concrete, so that the sampling barrel 140 and the penetration head 100 are lifted upward synchronously.

[0041] It can be understood that by setting the fixed pulley 180 and the lifting rope 190, when extracting concrete, the lifting rope 190 is pulled upward. After the lifting rope 190 passes through the fixed pulley 180 and turns, the lifting rope 190 and the fixed pulley 180 cooperate to drive the sampling barrel 140 to move close to the penetration head 100. The sampling barrel 140 and the penetration head 100 cooperate to surround the concrete, so that the concrete is located in the accommodating cavity 200. The lifting rope 190 is continued to be pulled, and the sampling barrel 140 and the penetration head 100 are lifted upward synchronously, thereby ensuring that the extracted sample is concrete.

[0042] It should be noted that the lifting rope 190 may be lifted upwards by using a lifting device, or the lifting rope 190 may be lifted upwards manually.

[0043] In some embodiments of the present invention, the penetration head 100 is a conical structure, and the diameter of the penetration head 100 is gradually reduced in a direction away from the sampling tube 140 .

[0044] It is understandable that by making the penetration head 100 conical, the penetration head 100 remains stable and balanced when sinking into the concrete layer 360, avoiding the penetration head 100 from tipping over and becoming unbalanced when sinking, and ensuring that the sampling tube 140 can extract samples normally.

[0045] At the same time, the diameter of the penetration head 100 gradually decreases in the direction away from the sampling tube 140, which is conducive to the rapid insertion of the penetration head 100 into the concrete layer 360 and avoids the penetration head 100 from sinking too slowly.

[0046] Furthermore, the cross-section of the first sealed cavity 110 of the penetration head 100 is set in a conical shape, that is, the first sealed cavity 110 is arranged along the shape of the penetration head 100, that is, the counterweight 120 is distributed in a conical shape, so that the penetration head 100 is more stable when sinking into the concrete layer 360.

[0047] In some embodiments of the present invention, the top of the penetration head 100 has a spherical surface 220 , and the bottom of the sampling tube 140 has a contact surface 230 that matches the spherical surface 220 .

[0048] It can be understood that when the penetration head 100 and the sampling tube 140 are relatively matched, the spherical surface 220 structure of the top surface of the penetration head 100 can make it easier to position the penetration head 100 in the sampling tube 140, which is beneficial for the center lines of the penetration head 100 and the sampling tube 140 to coincide with each other, so that the top of the penetration head 100 and the bottom of the sampling tube 140 fit tightly, thereby reducing the loss of concrete during extraction.

[0049] In some embodiments of the present invention, the bottom of the penetration head 100 has an inlet and outlet communicating with the first sealed cavity 110 and a plugging member 240 for sealing the inlet and outlet, and the inlet and outlet accommodates the counterweight 120 to pass through.

[0050] Specifically, the blocking member 240 may be a bolt, which is screwed with the inlet and outlet threads, and a sealing gasket is arranged between the bolt heads to ensure that the first sealing cavity 110 is in a sealed state.

[0051] It is understandable that the bolts can be loosened and the counterweight 120 can be installed into the first sealed cavity 110 to facilitate the adjustment of the density of the through-head 100, and thus the density of the through-head 100 can be adjusted, and further, the density of the sampling mechanism 380 can be adjusted so that the density of the sampling mechanism 380 is equal to the density of the actually measured concrete.

[0052] In some embodiments of the present invention, the connecting frame 130 has a vertical rod 250 located in the sampling tube 140 , the bottom end of the vertical rod 250 is coaxially connected to the penetration head 100 , and the top end of the vertical rod 250 is connected to the measuring rope 170 .

[0053] It can be understood that during the process of the penetration head 100 sinking into the pile hole, the penetration head 100 is connected to the measuring rope 170 through the vertical pole 250. Before entering the concrete layer 360, the measuring rope 170 is in a tensioned state. The vertical pole 250 and the penetration head 100 are coaxially connected, so that the penetration head 100 sinks in a balanced manner, ensuring the subsequent smooth extraction of concrete.

[0054] Specifically, a nut is connected to the top of the penetration head 100, and the bottom of the vertical rod 250 is threadedly connected to the nut. The connecting frame 130 can be installed in the sampling tube 140 first, and then the penetration head 100 and the connecting frame 130 are connected and fixed.

[0055] In some embodiments of the present invention, the connecting frame 130 has at least two horizontal rods 260, at least two horizontal rods 260 are distributed along the horizontal periphery of the vertical rod 250, the horizontal rods 260 are connected to the vertical rod 250, at least two horizontal rods 260 are connected to the support rod 270, and the fixed pulley 180 is arranged on the support rod 270.

[0056] For example, the connecting frame 130 has two horizontal rods 260, which are symmetrically distributed about the vertical rod 250. The two horizontal rods 260 are both provided with fixed pulleys 180 through the support rods 270, so that the vertical rod is in an upright state, which is conducive to keeping the penetration head 100 balanced.

[0057] In some embodiments of the present invention, a sliding guide groove 280 and a sliding portion are provided between the horizontal rod 260 and the inner wall of the sampling tube 140. The guide groove 280 extends in the up and down directions, so that the connecting frame 130 and the sampling tube 140 can slide smoothly up and down relative to each other.

[0058] In some embodiments of the present invention, the floating portion is a second sealed cavity 210 , and the second sealed cavity 210 is arranged in a ring shape along the circumference of the sampling tube 140 .

[0059] It can be understood that the use of the second sealed cavity 210 increases the volume of the sampling tube 140 , which is beneficial for making the density of the sampling tube 140 lower than the density of concrete.

[0060] In some embodiments of the present invention, reference Figure 1 , Figure 2 and Figure 3 , further comprising a bracket 290, a winding drum 300 rotatably disposed on the bracket 290, the winding drum 300 being wound with a measuring rope 170, the winding drum 300 having a rotating shaft 310, and the rotating shaft 310 being mounted with a counter 320.

[0061] It should be noted that a bracket 290 is placed above the pile hole, and a winding drum 300 is installed on the bracket 290. When the winding drum 300 rotates to release the measuring rope 170, a counter 320 is used to count the number of rotations of the winding drum 300. When the sampling tube 140 reaches the elevation position of the concrete layer 360, the number of rotations displayed by the counter 320 is recorded, and the length of the measuring rope 170 released by the winding drum 300 can be calculated, thereby improving the convenience of detection.

[0062] Based on the above-mentioned pile top elevation detection device, a detection method according to an embodiment of the present invention comprises the following steps: Concrete density test, test the density of prefabricated concrete at the construction site to obtain accurate data. The actual measured density of concrete is .

[0063] Sampling mechanism 380 is manufactured. A sampling mechanism 380 with the same density as concrete is manufactured. Figure 4 The sampling mechanism 380 is composed of a penetration component 370 and a sampling barrel 140. The penetration component 370 is composed of a penetration head 100, a connecting frame 130, a counterweight and a fixed pulley 180. First, the penetration head 100, the sampling barrel 140, the single counterweight, the fixed pulley 180 and the connecting frame 130 are weighed respectively to obtain the corresponding masses, and the volumes of the penetration head 100, the sampling barrel 140, the single counterweight, the fixed pulley 180 and the connecting frame 130 are calculated respectively to obtain the corresponding volumes.

[0064] Furthermore, according to the density calculation formula , is density, m is mass, V is volume, and the density of the sampling tube 140 is , the density of the through-head 100 is , the density of a single weight is , the density of the fixed pulley 180 is , the density of the connecting frame 130 is , the density of the penetrating component 370 is , the density of the sampling mechanism 380 is , n is the number of weights, where , , .

[0065] Further, find the number of counterweights n, according to , we can construct the equation: , and we can solve The penetration head 100, the fixed pulley 180, the connecting frame 130 and n counterweights are assembled to form a penetration component 370, and the penetration component 370 and the sampling tube 140 are assembled to form a sampling mechanism 380.

[0066] The measuring rope 170 and the lifting rope 190 are prepared, and a bracket 290 is installed above the pile hole. A winding drum 300 is set on the bracket 290, and a counter 320 is installed on the rotating shaft 310 of the winding drum 300. The measuring rope 170 is wound around the winding drum 300, and the measuring rope 170 is connected to the connecting frame 130. The displayed value of the counter 320 is reset to zero, and the lifting rope 190 is connected to the top of the sampling tube 140 and passed around the fixed pulley 180.

[0067] Concrete sampling, rotating the winding drum 300, releasing the measuring rope 170, placing the sampling mechanism 380 into the pile hole, observing the state of the measuring rope 170 at the pile hole mouth, the measuring rope 170 is in a taut state under the gravity of the penetration assembly 370, indicating that the penetration head 100 is in the process of sinking. , the penetration head 100 can sink into the concrete layer 360. When the penetration head 100 enters the concrete layer 360, due to The sampling tube 140 floats up under the buoyancy of the concrete, and the sampling tube 140 and the connecting frame 130 slide relative to each other. Then, the sampling tube 140 abuts against the connecting frame 130 through the limiting portion 160 to prevent the penetration head 100 from sinking. , the measuring rope 170 is in a relaxed state, indicating that the sampling mechanism 380 is suspended in the concrete layer 360, and the sampling mechanism 380 is at the elevation position of the concrete layer 360 in the pile hole, and the number of turns a of the winding drum 300 displayed by the counter 320 can be recorded. According to the circumference of the winding drum 300 c, the length of the measuring rope 170 released by the winding drum 300 can be obtained. .

[0068] To lift the concrete, pull up the lifting rope 190 on the pile hole. After the lifting rope 190 is turned by the fixed pulley 180, it can drive the sampling tube 140 to move downward, so that a receiving chamber 200 is formed between the inner wall of the sampling tube 140 and the top of the penetration head 100. The receiving chamber 200 is loaded with concrete, so that the sampling tube 140 and the penetration head 100 are lifted upward synchronously to complete the sampling work.

[0069] Concrete testing: Check the concrete sample obtained. If there is a concrete sample in the sampling assembly, it indicates that the sampling is completed. Otherwise, re-measure the density of the concrete and adjust the number of the weights 120 in the first sealed cavity 110 so that the density of the sampling mechanism 380 matches the density of the concrete, and then re-sample the concrete; Concrete calculation, refer to Figure 5 , according to the initial elevation of the sampling mechanism 380 at the pile hole , the measuring rope 170 length released from the winding drum 300 , the elevation of the concrete layer 360 in the pile hole can be calculated .

[0070] In summary, the present invention manufactures a sampling mechanism 380 with the same density as concrete. The sampling mechanism 380 is composed of a penetration component 370 and a sampling tube 140. The density of the penetration component 370 is greater than the density of concrete, and the density of the sampling tube 140 is less than the density of concrete. The penetration component 370 can sink into the concrete layer 360 in the pile hole, so that the penetration component 370 drives the sampling tube 140 to sink into the concrete layer 360. Since the density of the sampling mechanism 380 is the same as the density of the concrete, the sampling mechanism 380 can be used in the concrete layer 360. The concrete layer 360 is suspended, and the sampling mechanism 380 is at the elevation of the concrete layer 360, so that the elevation of the concrete layer 360 can be measured more accurately, which is convenient for calculating the subsequent concrete pouring amount. In addition, by adjusting the number of counterweights 120 in the first sealed cavity 110 in the penetration head 100, the density of the penetration component 370 is greater than the density of the concrete, and the density of the sampling mechanism 380 can be maximized to be close to the density of the concrete, thereby ensuring that the measured value of the elevation of the concrete layer 360 is closer to the true value of the concrete layer elevation.

[0071] In the description of this specification, the description with reference to the terms "one embodiment, some embodiments, illustrative embodiments, examples, specific examples or some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A pile top elevation detection device, characterized in that: include: A penetration head (100) is used to be sunk into concrete, wherein a first sealed cavity (110) is defined inside the penetration head (100), a counterweight (120) is installed inside the first sealed cavity (110), and a connecting frame (130) is arranged on the top of the penetration head (100); a sampling barrel (140), the sampling barrel (140) being located above the penetration head (100), the sampling barrel (140) being slidably connected to the connecting frame (130) up and down, the sampling barrel (140) being provided with a floating portion, and when the penetration head (100) sinks into the concrete layer (360), the floating portion drives the sampling barrel (140) to move in a direction away from the penetration head (100), so that a feeding channel (150) is formed between the bottom of the sampling barrel (140) and the top of the penetration head (100); a limiting portion (160), the limiting portion (160) being connected to the sampling barrel (140), the limiting portion (160) being arranged close to the penetration head (100), the limiting portion (160) being used to abut against the connecting frame (130) to prevent the sampling barrel (140) from moving in a direction away from the penetration head (100); A measuring rope (170), the measuring rope (170) being connected to the connecting frame (130), and the measuring rope (170) being used to measure the elevation of a concrete layer; a fixed pulley (180), the fixed pulley (180) being rotatably connected to the connecting frame (130), and the fixed pulley (180) being arranged vertically; A lifting rope (190) is provided. The lifting rope (190) is connected to the sampling barrel (140) after passing around the radial outer surface of the fixed pulley (180). When the lifting rope (190) is pulled upward, the sampling barrel (140) moves close to the penetration head (100), so that a receiving chamber (200) is formed between the inner wall of the sampling barrel (140) and the top of the penetration head (100). The receiving chamber (200) is loaded with concrete, so that the sampling barrel (140) and the penetration head (100) are lifted upward synchronously.

2. A pile top elevation detection device according to claim 1, characterized in that: The floating portion is a second sealed cavity (210), and the second sealed cavity (210) is arranged in a ring shape along the circumference of the sampling cylinder (140).

3. A pile top elevation detection device according to claim 1, characterized in that: The penetration head (100) is a conical structure, and the diameter of the penetration head (100) is gradually reduced in a direction away from the sampling barrel (140).

4. A pile top elevation detection device according to claim 1, characterized in that: The top of the penetration head (100) has a spherical surface (220), and the bottom of the sampling tube (140) has a contact surface (230) that matches the spherical surface (220).

5. A pile top elevation detection device according to claim 1, characterized in that: The bottom of the penetration head (100) has an inlet and outlet communicating with the first sealed cavity (110), and a plugging member (240) for sealing the inlet and outlet, and the inlet and outlet accommodate the counterweight (120) to pass through.

6. A pile top elevation detection device according to claim 1, characterized in that: The connecting frame (130) has a vertical rod (250) located in the sampling tube (140), the bottom end of the vertical rod (250) is coaxially connected to the penetration head (100), and the top end of the vertical rod (250) is connected to the measuring rope (170).

7. A pile top elevation detection device according to claim 6, characterized in that: The connecting frame (130) has at least two horizontal rods (260), at least two of the horizontal rods (260) are distributed along the horizontal periphery of the vertical rod (250), the horizontal rods (260) are connected to the vertical rod (250), at least two of the horizontal rods (260) are connected to a support rod (270), and the fixed pulley (180) is arranged on the support rod (270).

8. A pile top elevation detection device according to claim 7, characterized in that: A guide groove (280) for sliding and a sliding portion are provided between the horizontal rod (260) and the inner wall of the sampling tube (140), and the guide groove (280) extends in the up-down direction.

9. A pile top elevation detection device according to claim 1, characterized in that: It also comprises a bracket (290), and a winding drum (300) rotatably arranged on the bracket (290), the measuring rope (170) being wound around the winding drum (300), the winding drum (300) having a rotating shaft (310), and a counter (320) being mounted on the rotating shaft (310).

10. A detection method, comprising a pile top elevation detection device according to any one of claims 1 to 9, characterized in that: The detection method comprises the following steps: Concrete density test, test the density of prefabricated concrete at the construction site to obtain accurate data. The actual measured density of concrete is ; A sampling mechanism (380) is manufactured. A sampling mechanism (380) having the same density as concrete is manufactured. The sampling mechanism (380) is composed of a penetration component (370) and a sampling tube (140). The penetration component (370) is composed of the penetration head (100), the connecting frame (130), the counterweight (120), and the fixed pulley (180). First, the penetration head (100), the sampling tube (140), a single counterweight (120), the fixed pulley (180), and the connecting frame (130) are weighed respectively to obtain corresponding masses. The volumes of the penetration head (100), the sampling tube (140), the single counterweight (120), the fixed pulley (180), and the connecting frame (130) are calculated respectively to obtain corresponding volumes. According to the density calculation formula , is density, m is mass, V is volume, and the density of the sampling tube (140) is , the density of the through-head (100) is , the density of a single weight is , the density of the fixed pulley (180) is , the density of the connecting frame (130) is , the density of the penetration component (370) is , the density of the sampling mechanism (380) is , n is the number of the weights, where , , ; Find the number n of the counterweights, according to , we can construct the equation: , and the solution is , assembling the penetration head (100), the fixed pulley (180), the connecting frame (130) and n counterweights to form a penetration assembly (370), and assembling the penetration assembly (370) and the sampling tube (140) to form the sampling mechanism (380); The measuring rope (170) and the lifting rope are prepared, the bracket (290) is installed above the pile hole, a winding drum (300) is arranged on the bracket (290), a counter (320) is installed on the rotating shaft (310) of the winding drum (300), the measuring rope (170) is wound around the winding drum (300), the measuring rope (170) is connected to the connecting frame (130), the display value of the counter (320) is reset to zero, the lifting rope (190) is connected to the top of the sampling tube (140), and is wound around the fixed pulley (180); To sample concrete, the winding drum (300) is rotated to release the measuring rope (170), and the sampling mechanism (380) is placed in the pile hole. The state of the measuring rope (170) is observed at the pile hole mouth. The measuring rope (170) is in a tensioned state under the gravity of the penetration assembly (370), indicating that the penetration head (100) is in the process of sinking. The penetration head (100) can sink into the concrete layer (360). When the penetration head (100) enters the concrete layer (360), due to The sampling tube (140) floats up under the buoyancy of the concrete, the sampling tube (140) and the connecting frame (130) slide relative to each other, and then the sampling tube (140) abuts against the connecting frame (130) through the limiting portion (160) to prevent the penetration head (100) from sinking. The measuring rope (170) is in a relaxed state, indicating that the sampling mechanism (380) is suspended in the concrete layer (360). The sampling mechanism (380) is at the elevation of the concrete layer (360) in the pile hole. The number of revolutions a of the winding drum (300) displayed by the counter (320) can be recorded. According to the circumference c of the winding drum (300), the length of the measuring rope (170) released by the winding drum (300) can be obtained. ; Concrete lifting, the lifting rope (190) is pulled up on the pile hole, and after the lifting rope (190) is turned by the fixed pulley (180), it can drive the sampling tube (140) to move downward, so that a receiving cavity (200) is formed between the inner wall of the sampling tube (140) and the top of the penetration head (100), and the receiving cavity (200) is loaded with concrete, so that the sampling tube (140) and the penetration head (100) are lifted upward synchronously to complete the sampling work; Concrete testing, checking the obtained concrete sample, if the concrete sample exists in the sampling assembly, it indicates that the sampling is completed, otherwise, re-measure the density of the concrete, and adjust the number of the counterweights (120) in the first sealed cavity (110) so that the density of the sampling mechanism (380) matches the density of the concrete, and then re-sample the concrete; Concrete calculation, based on the initial elevation of the sampling mechanism (380) at the pile opening , the length of the measuring rope (170) released by the winding drum (300) , the elevation of the concrete layer (360) in the pile hole can be calculated .

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