Pile-forming elevation detection device for cast-in-situ bored pile

Abstract

The utility model relates to the technical field of elevation detection devices, in particular to a cast-in-situ bored pile forming elevation detection device which comprises a supporting frame, a cantilever assembly is arranged on the supporting frame and comprises a cantilever rod, the cantilever rod is horizontally arranged, one end of the cantilever rod is installed on the supporting frame, and a sleeve is fixed to the end, away from the supporting frame, of the cantilever rod. A floating rod is arranged at the end, close to the sleeve, of the cantilever rod and movably inserted into the containing cavity of the sleeve, scale strips are arranged on the outer wall of the floating rod, a floating ball is fixed to the bottom of the floating rod, the density of the floating rod is larger than that of slurry and that of scum, and the density of the floating ball is larger than that of the slurry and that of the scum. The density of the floating rod and the floating ball is smaller than that of concrete, and the accuracy of measuring the pile-forming concrete elevation can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of elevation detection devices, and in particular to an elevation detection device for bored cast-in-place piles. Background Art

[0002] When pouring concrete into the casing of bored cast-in-place piles, the liquid in the casing is mud, scum and concrete from top to bottom. The mud and scum have low strength after solidification and need to be chiseled off later. Therefore, during the concrete pouring construction, it is necessary to over-pour to a certain height to ensure that the concrete reaches the designed elevation of the pile top.

[0003] Since the height of concrete cannot be directly observed during concrete pouring, bamboo poles or steel bars are usually inserted into the concrete at the hole for inspection during construction. When the lower end of the bamboo pole or steel bar contacts the coarse aggregate in the concrete, the length of the bamboo pole or steel bar inserted into the concrete is measured to determine whether the concrete has reached the designed elevation. However, this method mainly relies on the experience and feeling of the surveyor and cannot accurately measure the elevation of the pile concrete, which can easily lead to insufficient over-pouring of concrete and affect the quality of the pile, or excessive over-pouring height causing concrete waste. Summary of the invention

[0004] In order to improve the accuracy of measuring the elevation of pile concrete, the present application provides a bored cast-in-place pile elevation detection device.

[0005] The present application provides a bored pile elevation detection device, which adopts the following technical solution:

[0006] A bored cast-in-place pile elevation detection device comprises a support frame, a cantilever assembly is arranged on the support frame, the cantilever assembly comprises a cantilever rod, the cantilever rod is arranged horizontally, one end of the cantilever rod is installed on the support frame, a casing is fixed to the end of the cantilever rod away from the support frame, the casing has a vertical through cavity, a float rod is arranged near one end of the cantilever rod near the casing, the float rod is movably inserted into the casing cavity, a scale bar is arranged on the outer wall of the float rod, a float ball is fixed to the bottom of the float rod, the density of the float rod is greater than the density of mud and the density of scum, the density of the float ball is greater than the density of mud and the density of scum, and the density of the float rod and the float ball is less than the density of concrete.

[0007] By adopting the above technical solution, when pouring concrete, the support frame is fixed to the outer periphery of the casing, and then the float rod and the float ball are placed in the casing. The density of the float rod and the float ball is greater than the density of the mud and the density of the scum, and the density of the float rod and the float ball is less than the density of the concrete. Therefore, the float ball will sink into the mud layer and the scum layer, and the float ball will float on the top surface of the concrete layer. Therefore, as the concrete is poured, the float ball and the float rod will move upward with the increase of concrete, and the position of the float ball can reflect the position of the top surface of the concrete layer.

[0008] During the concrete pouring process, it is necessary to continuously pay attention to the changes of the floating rod. Construction personnel can know the elevation of the concrete by observing the scale bar. During the concrete pouring process, the floating ball and the floating rod will show different changes in the lifting rate as the density of different media such as mud, slag and concrete changes. The floating rod has a slower floating rate in the mud medium and a faster floating rate in the slag medium. The rising rate in the concrete medium is consistent with the concrete pouring. When the control elevation is 200mm lower than the casing top elevation, the pouring must be stopped. Wait until the three different media are static and stable with clear and thick boundaries. Pull out the floating rod to the top of the mud and let it sink naturally. After the concrete medium elevation is confirmed, continue to add concrete pouring, thereby effectively controlling the pile top elevation to meet the design elevation and avoid material loss and waste caused by over-pouring of concrete, thereby improving the accuracy of measuring the pile concrete elevation.

[0009] Preferably, the outer wall of the floating rod is sleeved with a rubber ring.

[0010] By adopting the above technical solution, the elevation of the top of the casing needs to be measured below the steel cage and before pouring concrete. The top of the casing needs to be 300mm higher than the normal site, and the deviation of the 800mm fine-level part around the casing shall not be greater than 20mm. The calculation result is fed back to the scale bar using a rubber ring to facilitate the control of the concrete pouring elevation. Before pouring concrete, the rubber ring on the float rod is adjusted to the corresponding numerical position of the calculated scale bar. During the process, it is necessary to continuously pay attention to the changes of the float rod, and it is advisable to control the red rubber ring to be flush with the elevation of the top of the casing. Under the action of the rubber ring, it is more convenient for construction personnel to observe.

[0011] Preferably, an end plate is installed on the top surface of the floating rod.

[0012] By adopting the above technical solution, under the action of the end plate, the situation where the floating rod falls off the casing can be reduced.

[0013] Preferably, the support frame includes a base and a support rod, the base includes three stabilizing rods, one end of the three stabilizing rods are fixed, the angle between two adjacent stabilizing rods is 120°, the support rod is fixed at the connection of the three stabilizing rods, the stabilizing rod is horizontally arranged, and the support rod is vertically arranged.

[0014] By adopting the above technical solution, the angle between two adjacent stabilizer bars is 120°, so the three stabilizer bars are evenly distributed around the circumference. When the top of the base is subjected to a force, the three stabilizer bars can be evenly distributed around the bottom surface, thereby more evenly distributing the load on the base. The three supporting points form an equilateral triangle, and the triangle has stability, thereby improving the stability of the entire support frame and reducing the vibration of the support frame.

[0015] Preferably, the cantilever assembly further includes a connecting rod, the connecting rod is fixed to the outer wall of the support rod, the connecting rod is horizontally arranged, and a horizontal through cavity is provided inside the connecting rod, and one end of the cantilever rod away from the sleeve passes through the connecting rod cavity.

[0016] By adopting the above technical solution, the cantilever rod passes through the connecting rod cavity, so that the length of the cantilever rod extending out of the connecting rod can be adjusted, and then the position of the float rod can be adjusted, so that the position of the float rod in the casing can be adjusted. The position of the float rod is adjusted to be away from the feeding conduit, the steel cage and the casing, so that the float rod can float up and down smoothly in the hole without obstruction.

[0017] Preferably, the cantilever assembly further includes a connecting piece, and the connecting rod and the supporting rod are detachably fixedly connected via the connecting piece.

[0018] By adopting the above technical solution, under the action of the connecting piece, the connection between the connecting rod and the supporting rod is made detachable, so that the position of the connecting rod can be adjusted conveniently, and the disassembly and installation of the connecting rod can also be facilitated.

[0019] Preferably, a limiting piece is provided at one end of the cantilever rod away from the sleeve, and a limiting column is provided at one end of the cantilever rod close to the limiting piece, and the limiting column and the cantilever rod are detachably fixedly connected via the limiting piece.

[0020] By adopting the above technical solution, under the action of the limiting member and the limiting column, the situation where the cantilever rod slides out of the connecting rod can be reduced.

[0021] Preferably, there are two cantilever assemblies, and the two cantilever assemblies are distributed along the vertical direction of the support rod.

[0022] By adopting the above technical solution, under the action of the two cantilever assemblies, the position of the float can be further limited, so that the float can move in the vertical direction when rising or falling, reducing the situation where the floating rod shakes when moving up and down, causing the floating rod direction to shift.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. When pouring concrete, fix the support frame on the outside of the casing, and then put the float rod and the float ball into the casing. The density of the float rod and the float ball is greater than the density of the mud and the scum, and the density of the float rod and the float ball is less than the density of the concrete. Therefore, the float ball will sink into the mud layer and the scum layer, and the float ball will float on the top surface of the concrete layer. Therefore, as the concrete is poured, the float ball and the float rod will move upward with the increase of concrete. The position of the float ball can reflect the position of the top surface of the concrete layer. Construction personnel can know the elevation of the concrete by observing the scale bar, thereby improving the accuracy of measuring the elevation of the pile concrete.

[0025] 2. The elevation of the top of the casing needs to be measured before pouring concrete under the steel cage. The top of the casing needs to be 300mm higher than the normal site, and the 800mm fine-level part around the casing should not exceed 20mm. The calculation result is fed back to the scale bar using a rubber ring to facilitate the control of the concrete pouring elevation. Before pouring concrete, adjust the rubber ring on the floating rod to the corresponding numerical position of the calculated scale bar. During the process, it is necessary to continuously pay attention to the changes of the floating rod. It is advisable to control the red rubber ring to be flush with the elevation of the top of the casing. Under the action of the rubber ring, it is more convenient for construction personnel to observe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 yes Figure 1 A is an enlarged view of the middle image.

[0028] Figure 3 yes Figure 1 Enlarged view of B.

[0029] Explanation of the reference numerals in the accompanying drawings: 1. Support frame; 11. Base; 111. Stabilizing rod; 12. Support rod; 2. Cantilever assembly; 21. Cross double U-shaped pipe clamp; 22. Connecting rod; 23. Cantilever rod; 24. Limiting piece; 25. Sleeve; 26. Limiting column; 3. Floating assembly; 31. Floating rod; 32. Floating ball; 33. Scale bar; 34. Rubber ring; 35. End plate. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The embodiment of the present application discloses a bored cast-in-place pile elevation detection device.

[0032] Reference Figure 1A bored pile elevation detection device includes a support frame 1, the support frame 1 includes a base 11 and a support rod 12, the base 11 includes a stabilizing rod 111, in the embodiment of the present application, there are three stabilizing rods 111, one ends of the three stabilizing rods 111 are welded, and the angle between two adjacent stabilizing rods 111 is 120°, so the three stabilizing rods 111 are evenly distributed around the circumference, when the top of the base 11 is subjected to a force, the three stabilizing rods 111 can be evenly distributed around the bottom surface, so as to more evenly distribute the load on the base 11, the three support points form an equilateral triangle, the triangle has stability, thereby improving the stability of the entire support frame 1, and at the same time, it can also reduce the vibration of the support frame 1, the support rod 12 is welded to the top surface of the stabilizing rod 111, the support rod 12 is located at the connection of the three stabilizing rods 111, and the long side of the support rod 12 is perpendicular to the long side of the stabilizing rod 111.

[0033] Reference Figure 1 and Figure 2 A cantilever assembly 2 is provided on the outer wall of the support rod 12, and the cantilever assembly 2 includes a connecting piece, a connecting rod 22 and a cantilever rod 23. In the embodiment of the present application, the connecting piece is a cross double U-shaped pipe clamp 21, and the connecting rod 22 is horizontally arranged. The long side of the connecting rod 22 is perpendicular to the long side of the support rod 12, and the outer wall of the connecting rod 22 is abutted against the outer wall of the support rod 12, so that the connecting rod 22 and the support rod 12 form a "cross" shaped structure after being assembled. The connecting rod 22 and the support rod 12 are fixed by the cross double U-shaped pipe clamp 21, and the interior of the connecting pipe has a horizontal through cavity, and the cantilever rod 23 is adapted to pass through the cavity of the connecting rod 22.

[0034] Reference Figure 1 and Figure 3 A limiting member 24 is provided at one end of the cantilever rod 23. The structure of the limiting member 24 is consistent with the structure of the connecting member and is not described in detail in the embodiment of the present application. A limiting column 26 is provided on the bottom surface of the cantilever rod 23. The long side of the limiting column 26 is perpendicular to the long side of the cantilever rod 23. The limiting column 26 and the cantilever rod 23 are fixed by the limiting member 24. Under the action of the limiting member 24 and the limiting column 26, the situation where the cantilever rod 23 slides out of the connecting rod 22 from one end can be reduced. A sleeve 25 is welded on the end of the cantilever rod 23 away from the limiting member 24, and the sleeve 25 has a vertical through cavity inside.

[0035] A floating assembly 3 is provided at one end of the cantilever rod 23 near the casing 25. The floating assembly 3 includes a floating rod 31 and a floating ball 32. The floating rod 31 moves through the casing 25 cavity. The floating ball 32 is fixed on the bottom surface of the floating rod 31. A scale bar 33 is provided on the outer wall of the floating rod 31. A rubber ring 34 is sleeved on the outer wall of the floating rod 31. Construction personnel can adjust the position of the rubber ring 34 according to the design elevation of the pile concrete.

[0036] The number of cantilever assemblies 2 depends on the specific situation. In the embodiment of the present application, there are two cantilever assemblies 2, and the two cantilever assemblies 2 are distributed in the vertical direction along the support rod 12. Under the action of the two cantilever assemblies 2, the position of the float rod 31 can be further limited, so that the float rod 31 can move in the vertical direction when rising or falling, thereby reducing the shaking of the float rod 31 when moving up and down, causing the direction of the float rod 31 to shift.

[0037] Reference Figure 1 When pouring concrete, the support frame 1 is fixed to the outer periphery of the casing, and then the float rod 31 and the float ball 32 are placed in the casing. The density of the float rod 31 and the float ball 32 is greater than the density of the mud and the density of the scum, and the density of the float rod 31 and the float ball 32 is less than the density of the concrete. Therefore, the float ball 32 will sink into the mud layer and the scum layer, and the float ball 32 will float on the top surface of the concrete layer. Therefore, as the concrete is poured, the float ball 32 and the float rod 31 will move upward with the increase of concrete, and the position of the float ball 32 can reflect the position of the top surface of the concrete layer.

[0038] Reference Figure 1 and Figure 3 The top elevation of the casing must be measured below the steel cage and before concrete pouring. The top of the casing must be 300mm higher than the normal site, and the 800mm precision leveling part around the casing must not exceed 20mm. The calculation result is fed back to the scale bar 33 using a rubber ring 34 to facilitate the control of the concrete pouring elevation.

[0039] Before pouring concrete, adjust the rubber ring 34 on the float rod 31 to the calculated numerical position corresponding to the scale bar 33. During the process, it is necessary to continuously pay attention to the changes of the float rod 31, and it is advisable to control the rubber ring 34 to be flush with the top elevation of the casing. During the concrete pouring process, the float ball 32 and the float rod 31 will have different lifting rates as the density of different media such as mud, slag and concrete changes. The floating rate of the float rod 31 in the mud medium is relatively slow, and the floating rate in the slag medium is relatively fast. The rising rate in the concrete medium is consistent with the concrete pouring. When the control elevation is 200mm lower than the top elevation of the casing, the pouring needs to be stopped. After the three different media are statically stable and the boundary is clear and thick, the float rod 31 is pulled out to the top surface of the mud and then naturally sinks. After the concrete medium elevation is confirmed, the concrete is continued to be poured, so as to effectively control the pile top elevation, which can meet the design elevation and avoid material loss and waste caused by over-pouring of concrete, thereby improving the accuracy of measuring the concrete elevation of the pile.

[0040] An end plate 35 is fixed to the top surface of the floating rod 31 . The diameter of the end plate 35 is larger than the diameter of the housing cavity of the sleeve 25 . Under the action of the end plate 35 , the floating rod 31 can be prevented from falling off the sleeve 25 .

[0041] The above are all preferred embodiments of the present application. The embodiments are only explanations of the present application and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A bored pile elevation detection device, characterized in that: The invention comprises a support frame (1), a cantilever assembly (2) is arranged on the support frame (1), the cantilever assembly (2) comprises a cantilever rod (23), the cantilever rod (23) is arranged horizontally, one end of the cantilever rod (23) is mounted on the support frame (1), a sleeve (25) is fixed to one end of the cantilever rod (23) away from the support frame (1), the sleeve (25) has a through cavity, and the cantilever rod (23) is close to one end of the sleeve (25). A floating rod (31) is provided, and the floating rod (31) is movably inserted into the housing cavity of the sleeve (25). A scale bar (33) is provided on the outer wall of the floating rod (31). A floating ball (32) is fixed to the bottom of the floating rod (31). The density of the floating rod (31) is greater than the density of the mud and the density of the scum. The density of the floating ball (32) is greater than the density of the mud and the density of the scum. The density of the floating rod (31) and the floating ball (32) is less than the density of concrete.

2. A bored pile elevation detection device according to claim 1, characterized in that: The outer wall of the floating rod (31) is sleeved with a rubber ring (34).

3. A bored pile elevation detection device according to claim 1, characterized in that: An end plate (35) is installed on the top surface of the floating rod (31).

4. A bored pile elevation detection device according to claim 1, characterized in that: The support frame (1) comprises a base (11) and a support rod (12); the base (11) comprises three stabilizing rods (111); one end of the three stabilizing rods (111) is fixed to each other; the angle between two adjacent stabilizing rods (111) is 120°; the support rod (12) is fixed at the connection of the three stabilizing rods (111); the stabilizing rod (111) is arranged horizontally; and the support rod (12) is arranged vertically.

5. A bored pile elevation detection device according to claim 4, characterized in that: The cantilever assembly (2) also includes a connecting rod (22), the connecting rod (22) being fixed to the outer wall of the support rod (12), the connecting rod (22) being arranged horizontally, the connecting rod (22) having a horizontal through cavity inside, and the cantilever rod (23) having one end away from the sleeve (25) passing through the connecting rod (22) cavity.

6. A bored pile elevation detection device according to claim 5, characterized in that: The cantilever assembly (2) further comprises a connecting piece, and the connecting rod (22) and the supporting rod (12) are detachably fixedly connected via the connecting piece.

7. A bored pile elevation detection device according to claim 1, characterized in that: A limiting member (24) is arranged at one end of the cantilever rod (23) away from the sleeve (25), and a limiting column (26) is arranged at one end of the cantilever rod (23) close to the limiting member (24). The limiting column (26) and the cantilever rod (23) are detachably fixedly connected via the limiting member (24).

8. A bored pile elevation detection device according to claim 4, characterized in that: There are two cantilever assemblies (2), and the two cantilever assemblies (2) are distributed along the vertical direction of the support rod (12).

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