Device for eliminating side friction resistance of invalid section pile

Abstract

The utility model relates to a device for eliminating side frictional resistance of an ineffective section pile, which belongs to the field of geotechnical engineering pile foundation detection and comprises a sleeve mechanism, an in-hole imaging mechanism is arranged in the sleeve mechanism, and a sleeve bottom plugging mechanism is arranged at the bottom of the sleeve mechanism. According to the device for eliminating the pile side frictional resistance of the ineffective section, the operation efficiency is greatly improved through bolt mounting and dismounting, it can be effectively guaranteed that the annular bag is not burnt without electric welding cutting, the dismounted fixed connecting assembly can be circularly applied to the next device, materials are saved, and the cost is reduced. Whether the annular bag is well sealed or not is monitored in real time in the concrete pouring process after the double sleeves are put into a hole, if the slurry leakage phenomenon exists, the air pressure of the bag can be increased in an air supply mode to achieve the purpose of complete sealing, and a remedial measure for poor sealing of the bag is added and is the key for obtaining accurate data in the follow-up static load test. And the double-sleeve separation condition can be monitored in real time in the static load test process.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation detection in geotechnical engineering, and particularly relates to a device for eliminating the side friction resistance of the ineffective section of a pile. Background Technique

[0002] Before pile foundation construction, in order to provide pile foundation bearing capacity parameters and the situation of pile tip bearing stratum for designers, an on-site pre-construction static load test of test piles is required. The side friction resistance of the pile from the ground to the designed pile top section is the key to affecting the accuracy of static load test data.

[0003] The prior art adopts the principle of double casing. The double casing is fixed by welding rib plates and the lower end is sealed. This technology has the following disadvantages: First, the rib plates need to be cut off before the double casing is lowered into the pile hole, and the operation time is long, and it is dangerous for workers to operate at the lower end of the casing for a long time; Second, after the rib plates are cut off, a sealing device is installed. Since the casing is in a vertically suspended state, the installation quality cannot be guaranteed; Third, after the double casing is lowered into the hole, the sealing effect of the lower end of the double casing is uncertain during the concrete pouring process; Fourth, during the static load test, it is uncertain whether the bottom end of the double casing is separated, which directly affects the static load test results. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a device for eliminating the side friction resistance of the ineffective section of a pile, which has the advantages of improving the operation efficiency, etc., and solves the problems such as long operation time.

[0005] To achieve the above object, the utility model provides the following technical solution: A device for eliminating the side friction resistance of the ineffective section of a pile, including a sleeve mechanism, an in-hole imaging mechanism is arranged inside the sleeve mechanism, and a bottom sealing mechanism of the sleeve is arranged at the bottom of the sleeve mechanism;

[0006] The sleeve mechanism includes an inner sleeve, an outer sleeve, a top annular sealing device of the sleeve, an annular bladder limiting plate, a fixed connection component and a fixed rib plate. The top annular sealing device of the sleeve is arranged between the inner sleeve and the outer sleeve in a sealing manner. The fixed connection component is arranged between the inner sleeve and the outer sleeve to connect the inner sleeve and the outer sleeve to each other. The fixed rib plate is welded and fixed between the inner sleeve and the outer sleeve.

[0007] The in-hole imaging mechanism includes a mobile terminal, a transmission wire and an imaging probe arranged inside the inner sleeve and the outer sleeve;

[0008] The bottom sealing mechanism of the sleeve includes a pipe cap, a gas stop valve, an air pipe, a connection port and an annular waterproof bladder arranged at the bottom of the inner sleeve and the outer sleeve. The connection port is opened between the air pipe and the annular waterproof bladder.

[0009] Furthermore, the number of the fixed ribs is two groups, and every two fixed ribs form a group, and the two groups of fixed ribs are evenly distributed between the inner sleeve and the outer sleeve.

[0010] Furthermore, the annular sealing device on the top of the cylinder is composed of a wing plate, a web plate, a slot, a wire threading hole, and a pipe threading hole. The slot is opened on the fixed rib plate and the thickness of the slot is less than the thickness of the fixed rib plate. The wing plate is fixed on the top of the web plate, and the wire threading hole and the pipe threading hole are both opened on the upper surface of the wing plate.

[0011] Furthermore, the lower ends of the inner sleeve and the outer sleeve are fixed by a fixed connection assembly, and the fixed connection assembly is composed of a fixed connection bolt and a fixed block, and the thickness of the fixed block is slightly smaller than the gap between the inner sleeve and the outer sleeve.

[0012] Furthermore, small holes are formed at the lower ends of the inner sleeve and the outer sleeve and the small holes in the same group are coaxial, and the fixed connecting bolts pass through the small holes.

[0013] Furthermore, the fixed connection components are symmetrically distributed between the inner sleeve and the outer sleeve, and the transmission wires and the gas pipes pass through the wire holes and the pipe holes respectively.

[0014] Furthermore, the imaging probe includes a light emitting component and a camera component, and the camera component is connected to the mobile terminal via a transmission wire.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The device for eliminating the friction resistance of the invalid section pile side is installed and disassembled by bolts, which greatly improves the working efficiency. The device does not use electric welding and cutting to effectively ensure that the annular bag is not burned, and the disassembled fixed connection components can be recycled and applied to the next set of devices, which greatly saves the use of materials.

[0017] 2. The device for eliminating the friction resistance on the side of the invalid section pile can monitor in real time whether the annular bag is well sealed during the pouring of concrete after the double sleeves are lowered into the hole. If there is leakage, the air pressure of the bag can be increased by adding air to achieve complete sealing. More importantly, this technology adds remedial measures for poor sealing of the bag, which is the key to obtaining accurate data in the subsequent static load test, and the separation of the double sleeves can be monitored in real time during the static load test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 for Figure 1 A magnified image of the middle part;

[0020] Figure 3 is Figure 1 The enlarged view of part B in the

[0021] Figure 4 The schematic diagram of the distribution of the fixing rib plates at the upper end of the double sleeves of the present utility model;

[0022] Figure 5 The schematic diagram of the structure of the annular sealing device at the top of the cylinder of the present utility model;

[0023] Figure 6 The schematic diagram of the imaging mechanism inside the hole of the present utility model;

[0024] Figure 7 The schematic diagram of the bottom plugging mechanism of the cylinder of the present utility model.

[0025] In the figure: 1 sleeve mechanism, 110 inner sleeve, 120 outer sleeve, 130 annular sealing device at the top of the cylinder, 131 clamping groove, 132 wire passing hole, 133 pipe passing hole, 134 wing plate, 135 web plate, 140 annular bladder limiting plate, 150 fixed connection assembly, 151 fixed block, 152 fixed connection bolt, 160 fixed rib plate, 2 imaging mechanism inside the hole, 210 mobile terminal, 220 transmission wire, 230 imaging probe, 3 bottom plugging mechanism of the cylinder, 310 air stop valve, 320 pipe cap, 330 gas transmission pipe, 340 connection port, 350 annular waterproof bladder. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Please refer to Figure 1-7, a device for eliminating the side friction resistance of ineffective section piles in this embodiment, includes a sleeve mechanism 1. An in-hole imaging mechanism 2 is arranged inside the sleeve mechanism 1, and a bottom plugging mechanism 3 is arranged at the bottom of the sleeve mechanism 1. The sleeve mechanism 1 includes an inner sleeve 110, an outer sleeve 120, a top annular sealing device 130, an annular bladder limiting plate 140, a fixed connection assembly 150, and a fixed rib plate 160. The top annular sealing device 130 is arranged to plug between the inner sleeve 110 and the outer sleeve 120. During use, a double sleeve is fabricated according to the external designed pile diameter size and the distance from the ground to the designed pile top. The inner diameter of the inner sleeve 110 is equal to the external designed pile diameter. The fixed connection assembly 150 is arranged between the inner sleeve 110 and the outer sleeve 120 to connect the inner sleeve 110 and the outer sleeve 120 to each other. The fixed rib plate 160 is welded and fixed between the inner sleeve 110 and the outer sleeve 120. The inner sleeve 110 and the outer sleeve 120 are welded and connected by the fixed rib plate 160. The fixed rib plates 160 are symmetrically welded at equal intervals between the inner sleeve 110 and the outer sleeve 120. The in-hole imaging mechanism 2 includes a mobile terminal 210, a transmission wire 220, and an imaging probe 230 arranged inside the inner sleeve 110 and the outer sleeve 120. The bottom plugging mechanism 3 includes a pipe cap 320, an air stop valve 310, an air delivery pipe 330, a connection port 340, and an annular waterproof bladder 350 arranged at the bottoms of the inner sleeve 110 and the outer sleeve 120. The connection port 340 is opened between the air delivery pipe 330 and the annular waterproof bladder 350. The top annular sealing device 130 is installed at the gap at the upper end of the inner sleeve 110 and the outer sleeve 120, and a card slot 131 is provided at the position of the fixed rib plate 160, where the size of the card slot 131 should not be less than the thickness of the fixed rib plate 160. The distribution spacing of the fixed rib plates 160 is consistent with the distribution spacing of the card slots 131 on the top annular sealing device 130.

[0028] In this example, the number of fixed rib plates 160 is two groups, and every two fixed rib plates 160 form a group. The two groups of fixed rib plates 160 are evenly distributed between the inner sleeve 110 and the outer sleeve 120. The inner diameter of the outer sleeve 120 is ten centimeters larger than the outer diameter of the inner sleeve 110. The upper and lower ends of the inner sleeve 110 are respectively fifty centimeters longer than the upper and lower ends of the outer sleeve 120. The barrel top annular sealing device 130 is composed of a wing plate 134, a web plate 135, a card slot 131, a wire threading hole 132, and a pipe threading hole 133. The card slot 131 is opened on the fixed rib plate 160 and the thickness of the card slot 131 is less than the thickness of the fixed rib plate 160. The wing plate 134 is fixed at the top end of the web plate 135. The wire threading hole 132 and the pipe threading hole 133 are both opened on the upper surface of the wing plate 134. The lower ends of the inner sleeve 110 and the outer sleeve 120 are fixed by a fixed connection assembly 150. The fixed connection assembly 150 is composed of a fixed connection bolt 152 and a fixed block 151. In order to facilitate the position matching between the card slot 131 and the fixed rib plate 160, and on the premise of meeting the fixing requirements, four are arranged at equal intervals in the gap at the upper end of the double sleeve. The lower ends of the inner sleeve 110 and the outer sleeve 120 are fixed by the fixed connection assembly 150. The thickness of the fixed block 151 is slightly less than the gap between the inner sleeve 110 and the outer sleeve 120. The fixed block 151 is made of a material that is not easily deformed. The double sleeve is made to fix the bottom of the double sleeve during the lifting process. The lower ends of the inner sleeve 110 and the outer sleeve 120 are provided with small holes and the small holes in the same group are coaxial. The fixed connection bolt 152 passes through the small holes. The thickness of the fixed block 151 is slightly less than the gap between the inner sleeve 110 and the outer sleeve 120, so that the fixed block 151 can be smoothly inserted and removed. The lower ends of the inner sleeve 110 and the outer sleeve 120 are provided with small holes. The small holes in the same group are coaxial and are large enough for the fixed connection bolt 152 to pass through. The fixed connection assembly 150 is symmetrically distributed between the inner sleeve 110 and the outer sleeve 120. The transmission wire 220 and the gas transmission pipe 330 respectively pass through the wire threading hole 132 and the pipe threading hole 133. The gas transmission pipe 330 passes through the pipe threading hole 133 on the barrel top annular sealing device 130 and the annular bladder limiting plate 140 from top to bottom. The lower end of the gas transmission pipe 330 is connected to the annular waterproof bladder 350 through a connection port 340. Install the fixed connection assembly 150 and lift the double sleeve device. The imaging probe 230 includes a light emitting component and a camera component. Before the sleeve mechanism 1 is put into the pile hole, the fixed connection assembly 150 is removed and recycled to other devices. The imaging probe 230 is put between the double sleeves through the wire threading hole 132 on the barrel top annular sealing device 130. The camera component is connected to the mobile terminal 210 through the transmission wire 220. The distance from the annular bladder limiting plate 140 is adjusted according to the imaging clarity and the ability to normally reflect the working state of the annular waterproof bladder 350. Subsequently, concrete is poured. The water and slurry inflow between the double sleeves are monitored in real time through the mobile terminal 210. When water or slurry inflow occurs, the annular waterproof bladder 350 is timely supplemented with air. After the concrete reaches the design strength,Discharge the gas in the annular waterproof bladder bag 350 and conduct a static load test.

[0029] It should be noted that through bolt installation and disassembly, the operation efficiency is greatly improved. Without electric welding and cutting, the device can effectively ensure that the annular bladder bag is not burned; moreover, the disassembled fixed connection component 150 can be recycled and applied to the next set of devices, greatly saving the use of materials. During the process of pouring concrete after the double sleeve is lowered into the hole, it is necessary to monitor in real time whether the annular bladder bag is well sealed. If there is slurry leakage, the air pressure in the bladder bag can be increased by adding air to achieve the purpose of complete sealing. More importantly, this technology adds a remedial measure for poor bladder bag sealing, which is the key to obtaining accurate data in subsequent static load tests; and during the static load test, the separation of the double sleeve can be monitored in real time.

[0030] It can be understood that the electrical components mentioned in the text are all electrically connected to the main controller and the power supply, and the electrical components mentioned in the text are all conventional known devices. This application will not go into too much detail. The main controller can be a conventional known device such as a computer for control. The control circuit of the main controller can be realized by simple programming by those skilled in the art. The provision of the power supply also belongs to the common knowledge in the art. And this utility model is mainly used to protect mechanical devices, so this utility model will not explain the control method and circuit connection in detail. At the same time, for the parts not described in detail in this utility model, they are all well-known technologies to those skilled in the art.

[0031] In the description of this utility model, it should be noted that unless otherwise clearly defined 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific situations.

[0032] The working principle of the above embodiment is as follows:

[0033] (1) During use, a double sleeve is fabricated according to the externally designed pile diameter size and the distance from the ground to the designed pile top. The inner sleeve 110 has an inner diameter equal to the externally designed pile diameter, and the outer sleeve 120 has an inner diameter that is ten centimeters larger than the outer diameter of the inner sleeve 110. The upper and lower ends of the inner sleeve 110 are respectively fifty centimeters longer than the upper and lower ends of the outer sleeve 120. The inner sleeve 110 and the outer sleeve 120 are welded and connected by fixing rib plates 160. The fixing rib plates 160 are symmetrically welded at equal intervals between the inner sleeve 110 and the outer sleeve 120. The barrel top annular sealing device 130 is installed at the gap between the upper ends of the inner sleeve 110 and the outer sleeve 120, and a slot 131 is provided at the position of the fixing rib plate 160. The size of the slot 131 should not be less than the thickness of the fixing rib plate 160. The distribution spacing of the fixing rib plates 160 is the same as the distribution spacing of the slots 131 on the barrel top annular sealing device 130. For the convenience of matching the position of the slot 131 and the fixing rib plate 160, under the premise of meeting the fixing requirements, four are arranged at equal intervals in the gap at the upper end of the double sleeve. The lower ends of the inner sleeve 110 and the outer sleeve 120 are fixed by a fixing connection assembly 150. The fixing connection assembly 150 is composed of a fixing connection bolt 152 and a fixing block 151. The thickness of the fixing block 151 is slightly less than the gap between the inner sleeve 110 and the outer sleeve 120 to facilitate the smooth insertion and removal of the fixing block 151. Small holes are opened at the lower ends of the inner sleeve 110 and the outer sleeve 120. The small holes in the same group are coaxial and are large enough for the fixing connection bolt 152 to pass through.

[0034] (2) The fixing block 151 is made of a material that is not easily deformed. Its function is to fix the bottom of the double sleeve during the fabrication and hoisting process of the double sleeve. Subsequently, it is necessary to install the bottom plugging mechanism 3. The gas transmission pipe 330 is passed through the pipe passing hole 133 on the barrel top annular sealing device 130 and the annular bladder limiting plate 140 from top to bottom. The lower end of the gas transmission pipe 330 is connected to the annular waterproof bladder 350 through a connection port 340. The fixing connection assembly 150 is installed, and the double sleeve device is hoisted. Before the sleeve mechanism 1 is placed into the pile hole, the fixing connection assembly 150 is removed and recycled for use on other devices. The imaging probe 230 is placed between the double sleeves through the wire passing hole 132 on the barrel top annular sealing device 130. The distance from the annular bladder limiting plate 140 is adjusted according to the imaging clarity and the ability to normally reflect the working state of the annular waterproof bladder 350. Subsequently, concrete is poured, and the water and slurry inflow conditions between the double sleeves are monitored in real time through the mobile terminal 210. When water or slurry inflow occurs, the annular waterproof bladder 350 is timely supplemented with air. After the concrete reaches the designed strength, the gas in the annular waterproof bladder 350 is discharged for the static load test.

[0035] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0036] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model.

Claims

1. A device for eliminating the side friction resistance of invalid segment piles, comprising a sleeve mechanism (1), characterized in that: An in-hole imaging mechanism (2) is provided inside the sleeve mechanism (1), and a bottom plugging mechanism (3) is provided at the bottom of the sleeve mechanism (1). The sleeve mechanism (1) includes an inner sleeve (110), an outer sleeve (120), a top annular sealing device (130), an annular bladder limiting plate (140), a fixed connection assembly (150), and a fixed rib plate (160). The top annular sealing device (130) is provided to block between the inner sleeve (110) and the outer sleeve (120). The fixed connection assembly (150) is provided between the inner sleeve (110) and the outer sleeve (120) to connect the inner sleeve (110) and the outer sleeve (120) to each other. The fixed rib plate (160) is welded and fixed between the inner sleeve (110) and the outer sleeve (120). The in-hole imaging mechanism (2) includes a mobile terminal (210), a transmission wire (220), and an imaging probe (230) provided inside the inner sleeve (110) and the outer sleeve (120). The bottom plugging mechanism (3) includes a pipe cap (320), an air stop valve (310), an air delivery pipe (330), a connection port (340), and an annular waterproof bladder (350) provided at the bottom of the inner sleeve (110) and the outer sleeve (120). The connection port (340) is opened between the air delivery pipe (330) and the annular waterproof bladder (350).

2. The device for eliminating the side friction resistance of ineffective segment piles according to claim 1, wherein: The number of the fixed rib plates (160) is two groups, and every two fixed rib plates (160) form a group. The two groups of fixed rib plates (160) are evenly distributed between the inner sleeve (110) and the outer sleeve (120).

3. An apparatus for eliminating the side friction resistance of ineffective segment piles according to claim 1, characterized in that: The top annular sealing device (130) is composed of a wing plate (134), a web plate (135), a clamping groove (131), a wire passing hole (132), and a pipe passing hole (133). The clamping groove (131) is opened on the fixed rib plate (160), and the thickness of the clamping groove (131) is less than the thickness of the fixed rib plate (160). The wing plate (134) is fixed at the top end of the web plate (135). The wire passing hole (132) and the pipe passing hole (133) are both opened on the upper surface of the wing plate (134).

4. An apparatus for eliminating the side friction resistance of ineffective segment piles according to claim 1, characterized in that: The lower ends of the inner sleeve (110) and the outer sleeve (120) are fixed by the fixed connection assembly (150). The fixed connection assembly (150) is composed of a fixed connection bolt (152) and a fixed block (151). The thickness of the fixed block (151) is slightly less than the gap between the inner sleeve 110 and the outer sleeve 120 (120).

5. An apparatus for eliminating the side friction resistance of ineffective segment piles according to claim 1, characterized in that: Small holes are opened at the lower ends of the inner sleeve (110) and the outer sleeve (120), and the small holes in the same group are coaxial. The fixed connection bolt (152) penetrates through the small holes.

6. The device for eliminating the side friction resistance of ineffective segment piles according to claim 3, characterized in that: The fixed connection assemblies (150) are symmetrically distributed between the inner sleeve (110) and the outer sleeve (120). The transmission wire (220) and the air delivery pipe (330) respectively penetrate through the wire passing hole (132) and the pipe passing hole (133).

7. An apparatus for eliminating the side friction of ineffective section piles according to claim 1, characterized in that: The imaging probe (230) includes a light emitting component and a camera component. The camera component is connected to the mobile terminal (210) through the transmission wire (220).

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