Device for measuring pile top height of cast-in-situ bored pile

Abstract

The utility model discloses a device for measuring the pile top height of a cast-in-situ bored pile. The device comprises a check valve and more than one section of measuring device which is hermetically connected end to end, the measuring device is of a tubular structure, a check valve is fixed to the end of the first section of the measuring device, and a valve clack of the check valve is obliquely arranged relative to the center axis of the measuring device. The side wall of the measuring device comprises a transparent part arranged in the axial direction. The measuring device has the advantages that the measuring device is used for extracting the bored pile top concrete, and the color and appearance of the concrete in the measuring device are observed through the transparent parts on the two sides to judge whether quality defects exist or not, so that whether continuous pouring is needed or not is determined, the pile top quality is guaranteed, namely, the bored pile top concrete height and concrete quality are guaranteed; the cost of later maintenance due to the quality of the pile foundation is greatly reduced, the waste of cast-in-place pile concrete is also reduced, and the cost is saved.

Description

Technical field:

[0001] The utility model relates to the technical field of bored pile casting equipment, in particular to a device for measuring the top height of a bored pile. Background technology:

[0002] Underwater bored pile grouting is a common pile foundation construction method in bridge engineering. Over-grouting on the pile top is to ensure the quality of the pile foundation. Traditionally, the height of the concrete on the top of the bored pile is measured using the "rope-suspended weight method". Since the rope is made of soft material, although the height of the pile top can be measured, the height measured is not accurate because the weight will stop falling when it touches debris on the pile top (mud sediment, pile top sediment). The over-grouting height can only be controlled or determined by hand feel and experience, which can easily lead to measurement errors. When the measured height is lower than the qualified value, it will cause engineering quality defects, and when the measured height is higher than the qualified value, it will cause project cost waste.

[0003] Moreover, this method cannot determine whether the quality of the concrete on the top of the pile is qualified, because it is impossible to determine whether over-pouring or other impurities in the concrete on the top of the pile cause engineering quality defects. Therefore, traditional measurement methods can no longer meet the requirements of refined project management and control.

[0004] Based on the above-mentioned construction drawbacks of traditional cast-in-place pile construction, a device for measuring the top height of bored cast-in-place piles is proposed. Utility model content:

[0005] The utility model aims to provide a device for measuring the pile top height of bored piles, so as to solve the problems of insufficient or excessive overfilling of pile heads and loose concrete on pile tops in engineering practice.

[0006] The utility model is implemented by the following technical scheme: a device for measuring the top height of a bored pile, comprising a check valve and more than one section of measuring devices sealed and connected at the head and tail; the measuring device is a tubular structure, the end of the first section of the measuring device is fixed with the check valve, the valve flap of the check valve is arranged obliquely relative to the central axis of the measuring device; the side wall of the measuring device comprises a transparent part arranged along the axial direction.

[0007] Furthermore, the inclination angle of the valve flap of the check valve relative to the central axis of the measuring device is 45°.

[0008] Furthermore, the measuring device includes two arc-shaped transparent parts and two arc-shaped reinforcement parts arranged alternately with the two transparent parts. The two transparent parts and the two reinforcement parts form a tubular structure of the measuring device, and a connecting part that is in contact with the outer wall of the transparent part is fixed between the two reinforcement parts.

[0009] Furthermore, the transparent part is made of transparent glass, and the reinforcing part and the connecting part are both made of stainless steel.

[0010] Furthermore, an external thread is provided at the end of the measuring device, and two adjacent sections of the measuring device are connected by a connecting nut.

[0011] Furthermore, a sealing ring is provided at the threaded connection between the connecting nut and each section of the measuring device.

[0012] Furthermore, it also includes an auxiliary descender mounted on the measuring device; the auxiliary descender includes an annular base plate and a support plate fixed to the outer edge of the annular base plate, and two baffles with movably fitted end faces are provided at the hole opening of the annular base plate, and the other end face of the baffle is hinged to the plate surface of the annular base plate; semicircular holes are respectively opened on the sides where the two baffles are fitted, and when the two baffles are fitted, the end of the connecting nut abuts against the baffle.

[0013] The advantages of the utility model are as follows: 1. The auxiliary descender is fixed on the original ground of the pile foundation hole, and the measuring device is extended into the water through the auxiliary descender. During the descent, the measuring device is gradually extended through the cooperation of the baffle and the connecting nut to meet the sampling length requirement. No additional staff is required to hold the measuring device of the front section to connect the measuring device of the rear section, thereby reducing labor intensity.

[0014] 2. When the check valve at the end of the first section of the measuring device contacts and extends into the concrete on the top of the bored pile, the valve disc of the check valve is forced to open inwards. As it continues to go deeper, the concrete will gradually enter the measuring device. After the sampling is completed, the measuring device begins to be lifted upward. The check valve will return to its original position and close under the action of the spring recovery force and the gravity of the concrete extracted from the measuring device. The height of the concrete on the top of the underwater bored pile extracted from the measuring device can be clearly seen through the transparent part, which can be converted into the height of the pile top. Therefore, the method of combining sampling to observe the quality of the concrete on the top of the pile and measuring the height of the concrete on the top of the pile can better solve the problems of insufficient or excessive over-injection of the pile head and loose concrete on the top of the pile in engineering practice.

[0015] 3. The utility model can effectively solve the construction drawbacks of the traditional bored pile construction process, including reducing the construction cost and construction difficulty, and can generate considerable economic benefits as a whole, and solve the defects of the quality of the concrete on the top of the traditional bored pile and the concrete height. Description of the drawings:

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is an exploded view of the utility model.

[0018] Figure 3 It is a schematic diagram of the structure of the first section of the measuring device with an oblique angle.

[0019] Figure 4 This is a schematic diagram of the auxiliary descender in use when the baffle is open.

[0020] Figure 5 This is a schematic diagram of the auxiliary descender in use when the baffle is closed.

[0021] Figure 6 It is a schematic diagram of the utility model when measuring the height of the pile top.

[0022] The components in the accompanying drawings are marked as follows: reinforcement part 1, bevel 2, check valve 3, transparent part 4, connecting part 5, sealing ring 6, connecting nut 7, measuring device 8, external thread 9, auxiliary descender 10, baffle 101, annular bottom plate 102, support plate 103, pile foundation concrete 11. Specific implementation method:

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figures 1 to 5 As shown, this embodiment provides a device for measuring the top height of bored piles, which includes a check valve 3 and more than one section of measuring devices 8 sealed at both ends. In this embodiment, the check valve 3 uses a single-flap check valve, and the number of measuring devices 8 is connected according to on-site requirements; the length of each section of the measuring device 8 is 1 meter, and its pipe diameter specification is DN65.

[0026] An external thread 9 is provided at the end of the measuring device 8, and two adjacent measuring devices 8 are connected by a connecting nut 7, so as to firmly connect multiple measuring devices 8 to meet the sampling length requirements and ensure the tensile strength of the connection; a sealing ring 6 is provided at the threaded connection between the connecting nut 7 and each measuring device 8 to ensure the sealing between the two connected measuring devices 8 and avoid water seepage.

[0027] An angle 2 is provided at the end of the first section of the measuring device 8, and a check valve 3 is fixed at the angle 2. The valve flap of the check valve 3 is inclined relative to the central axis of the measuring device 8. In this embodiment, the valve flap of the check valve 3 is inclined at a 45° angle relative to the central axis of the measuring device 8; it is not only conducive to inserting into the concrete, but also the valve flap of the check valve 3 opens inward after being stressed, which is convenient for sampling; starting from the end of the first section of the measuring device 8 where the check valve 3 is installed, the pile foundation concrete 11 is gradually penetrated. At the initial stage when the check valve 3 extends below the liquid surface, the valve flap is in a closed state under the action of the spring to prevent mud from entering. When the check valve 3 continues to descend until it contacts the bored pile foundation concrete, the end of the measuring device 8 inclined at 45° will be easily inserted into the interior of the pile foundation concrete 11, and the bored pile foundation concrete will open the check valve 3 inward by 5-6 cm to extract the concrete sample.

[0028] The measuring device 8 is a tubular structure, and includes two arc-shaped transparent parts 4 and two arc-shaped reinforcement parts 1 arranged alternately with the two transparent parts 4. The two transparent parts 4 and the two reinforcement parts 1 form a tubular structure measuring device 8, and a scale is provided on the transparent part 4; through the transparent part 4, it is convenient to observe the appearance of the sampled concrete and measure and calculate the height of the pile top; a connecting part 5 that is in contact with the outer wall of the transparent part 4 is fixed between the two reinforcement parts 1; the edge of the reinforcement part 1 and the transparent part 4 are overlapped with each other, and the transparent part 4 is limited between the two reinforcement parts 1 by the connecting part 5.

[0029] The transparent part 4 is made of high-strength transparent glass, and the reinforcing part 1 and the connecting part 5 are made of stainless steel. The color and appearance of the sampled concrete can be observed through the two transparent parts 4, that is, whether it is mixed with mud, sediment or other impurities, so as to judge whether there is a quality defect. At the same time, by observing the height of the sampled concrete in the measuring device 8, the height of the pile top can be converted, such as Figure 6 As shown, △h=H-h1+h2, △h represents the height of the pile top, H is the original ground elevation, h1 is the total height of the measuring device 8, and h2 is the height of the concrete inside the measuring device 8; thereby, it is determined whether it is necessary to continue pouring to ensure the concrete height and concrete quality of the bored pile top, which greatly reduces the cost of pile foundation quality maintenance in the later stage, reduces the waste of bored pile concrete, and saves costs.

[0030] It also includes an auxiliary descender 10 sleeved on the measuring device 8, the auxiliary descender 10 includes an annular bottom plate 102 and a support plate 103 integrally formed with the outer edge of the annular bottom plate 102, and when in use, it is installed and fixed on the original ground at the hole of the pile foundation; two baffles 101 with movable end faces are symmetrically arranged at the hole of the annular bottom plate 102, and the other end face of the baffle 101 is hinged to the plate surface of the annular bottom plate 102, and the two baffles 101 can be opened or closed; the two baffles 101 can be opened or closed; the two baffles 101 can be opened or closed. Semicircular holes are respectively provided on the sides where the two baffles 101 are in contact with each other. When the two baffles 101 are in contact with each other, the end of the connecting nut 7 abuts against the baffle 101. When the two baffles 101 are closed, the whole circle formed by the two semicircular holes is not smaller than the diameter of the measuring device 8, which is convenient for the measuring device 8 to pass through, and the diameter of the whole circle is smaller than the outer diameter of the connecting nut 7, so that the connecting nut 7 between the two connected measuring devices 8 can be clamped on the closed baffle 101, which is convenient for connecting other measuring devices 8 again.

[0031] Usage process: fix the auxiliary descender 10 in a firm position on the original ground at the hole of the pile foundation, open the two baffles 101, pass the connected measuring device 8 through the hole of the annular bottom plate 102, and extend it underwater. When it is necessary to continue to connect a new measuring device 8, close the two baffles 101 so that the connecting nut 7 is clamped on the edge of the whole circle surrounded by the semicircular holes of the two baffles 101, which is convenient for connection, reduces the labor intensity, and prevents the measuring device 8 from falling during the connection process; after the connection is completed, open the two baffles 101 again and continue to descend section by section.

[0032] As the connected measuring device 8 descends section by section, when the check valve 3 at the end of the first section of the measuring device 8 contacts and extends into the bored pile foundation concrete, the valve disc of the check valve 3 is forced to open inward, and as it continues to go deeper, the concrete will gradually enter the measuring device 8. The depth of the bored pile foundation concrete inserted and extracted by the measuring device 8 is 1-2 meters. At this time, the descent is stopped and the measuring device 8 is lifted upward. The check valve 3 will return to its original position and close under the action of the spring recovery force and the gravity of the concrete extracted in the measuring device 8, thereby retaining the concrete sample inside the measuring device 8. The connecting nut 7, the measuring device 8, and the sealing ring 6 are continuously lifted and removed section by section until they are completely taken to the ground, and then the outside of the measuring device 8 is rinsed with water. The mud on the wall is exposed to expose the transparent parts 4 on both sides of the measuring device 8. Through the transparent parts 4, the height of the underwater bored pile concrete extracted from the measuring device 8 can be clearly seen, which can be converted into the height of the pile top (that is, △h=H-h1+h2, △h is the height of the pile top, H is the original ground elevation, h1 is the total height of the measuring device 8, and h2 is the height of the concrete inside the measuring device 8); at the same time, it can be observed whether the mixture is uniform and whether it is mixed with mud, sediment or other impurities; repeat the above process 2-3 times to determine whether over-pouring is needed; thereby, the defects of the quality and height of the concrete on the top of the traditional cast-in-place pile are solved, and the construction cost and difficulty are reduced, which can generate considerable economic benefits as a whole.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for measuring the top height of bored piles, characterized in that: It includes a check valve and more than one section of measuring devices sealed at the ends; The measuring device is a tubular structure, the check valve is fixed to the end of the first section of the measuring device, and the valve flap of the check valve is inclined relative to the central axis of the measuring device; The side wall of the measuring device includes a transparent portion arranged along the axial direction.

2. The device for measuring the top height of bored piles according to claim 1, characterized in that: The inclination angle of the valve flap of the check valve relative to the central axis of the measuring device is 45°.

3. The device for measuring the top height of bored piles according to claim 1, characterized in that: The measuring device comprises two arc-shaped transparent parts and two arc-shaped reinforcement parts arranged alternately with the two transparent parts. The two transparent parts and the two reinforcement parts form a tubular structure of the measuring device, and a connecting part that fits the outer wall of the transparent part is fixed between the two reinforcement parts.

4. The device for measuring the top height of bored piles according to claim 3, characterized in that: The transparent part is made of transparent glass, and the reinforcing part and the connecting part are both made of stainless steel.

5. The device for measuring the top height of bored piles according to any one of claims 1 to 4, characterized in that: The end of the measuring device is provided with an external thread, and two adjacent measuring devices are connected by a connecting nut.

6. The device for measuring the top height of bored piles according to claim 5, characterized in that: A sealing ring is provided at the threaded connection between the connecting nut and each section of the measuring device.

7. The device for measuring the top height of bored piles according to claim 5, characterized in that: It also includes an auxiliary descender mounted on the measuring device; the auxiliary descender includes an annular bottom plate and a support plate fixed to the outer edge of the annular bottom plate, two baffles with movably fitted end faces are provided at the hole opening of the annular bottom plate, and the other end face of the baffle is hinged to the plate surface of the annular bottom plate; semicircular holes are respectively opened on the sides where the two baffles are fitted, and when the two baffles are fitted, the end of the connecting nut abuts against the baffle.

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