Visual reinforcement cage pile top elevation control device

Abstract

The utility model discloses a visual reinforcement cage pile top elevation control device, and relates to the technical field of building construction measuring appliances, a reinforcement cage is vertically suspended in a vertical hole in a soil body, and the top of the reinforcement cage is provided with a threaded sleeve; the threaded sleeve is in threaded connection with a pile top elevation measurer, the pile top elevation measurer comprises a rod body of which the lower end is in threaded connection with the threaded sleeve, and a distance measuring instrument, a positioning mechanism and a limiting plate which are sequentially arranged on the rod body at intervals from top to bottom, and the measuring direction of the distance measuring instrument is parallel to the central axis of the rod body; the upper surface of the limiting plate is perpendicular to the measuring direction of the range finder. The pile top elevation measurer is used in cooperation with a threaded sleeve installed on the top of the reinforcement cage, the actual vertical distance between the upper end face of the current reinforcement cage and the ground plane can be accurately measured, and the actual distance value is compared with the pile top elevation value in a design drawing to judge whether the reinforcement cage is installed in place or not. And after the measurement work is completed, the pile top elevation measurer is detached for reuse.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction measuring instruments, in particular to a visual reinforcement cage pile top elevation control device. Background Art

[0002] The vertical distance between the top surface of a rebar cage installed vertically in a vertical hole and the ground is the pile top elevation. This value is fixed in the design drawings. After installation, the actual vertical distance between the top surface of the rebar cage and the ground is greater or less than the pile top elevation specified in the design drawings.

[0003] During the construction of cast-in-place piles, ground-anchored walls and other components, if the pile top elevation of the reinforcement cage is not accurately controlled, it will have a significant impact on the quality of the pile head.

[0004] The reason for this situation is mostly due to the gravity of the concrete carrying the steel cage down, which directly results in the steel cage not meeting the pile top elevation after the pile head is broken. The insufficient length of the steel cage anchorage section requires measures such as pile connection to compensate, which brings defects to the project quality, increases construction costs, and greatly affects the quality of pile construction, thereby affecting the proportion of Class A piles, and thus further affecting the project's excellence. This type of situation is very likely to occur in cast-in-place components with large negative void sections, such as cast-in-place components in elevator pits. The key is that once this situation occurs, it is often impossible to effectively and visually inspect and control it, which brings great inconvenience to construction.

[0005] The conventional method for measuring the actual vertical distance between the upper end surface of a rebar cage and the ground plane after installation is generally to install a measuring ruler vertically on the top of the rebar cage and read the value on the measuring ruler directly after the cage is installed. However, this method can result in inaccurate readings.

[0006] Therefore, a visual reinforcement cage pile top elevation control device is proposed. Utility Model Content

[0007] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a visual reinforcement cage pile top elevation control device.

[0008] The purpose of this utility model is achieved through the following technical solutions:

[0009] A visual steel cage pile top elevation control device, wherein the steel cage is vertically suspended and installed in a vertical hole in the soil. A threaded sleeve is provided on the top of the steel cage, and the upper end surface of the threaded sleeve is coplanar with the upper end surface of the steel cage; the threaded sleeve is threadedly connected to a pile top elevation meter, and the pile top elevation meter includes a rod body whose lower end is threadedly connected to the threaded sleeve, and a rangefinder, a positioning mechanism and a limit plate that are sequentially arranged on the rod body from top to bottom. The measuring direction of the rangefinder is parallel to the central axis of the rod body, and the upper surface of the limit plate is perpendicular to the measuring direction of the rangefinder.

[0010] Furthermore, in the present invention, the positioning mechanism includes a sliding disk slidably arranged on the rod body and at least one ruler hinged to the sliding disk, and when the ruler is in one of its extreme positions, its extension direction is perpendicular to the central axis of the rod body; the cross-section of the ruler is a regular polygon with an even number of sides, and the side of the ruler close to the rangefinder is parallel to the upper surface of the limit plate.

[0011] Furthermore, in the present invention, a mounting ring is provided at the upper end of the rod body, the mounting ring is located between the rangefinder and the sliding disk, and the sliding disk is connected to the mounting ring via a spring.

[0012] Furthermore, in the present invention, the number of the above-mentioned rulers is four, and the four above-mentioned rulers are distributed in a ring array around the central axis of the above-mentioned rod body.

[0013] Furthermore, in the present invention, the edge ring array of the sliding disk is provided with four limit blocks, and the four limit blocks correspond to the four rulers one by one.

[0014] Furthermore, in the present invention, a binding rope is provided at the top end of the rod.

[0015] The beneficial effects of the utility model are:

[0016] This utility model provides a visual rebar cage pile top elevation control device. The pile top elevation meter, used in conjunction with a threaded sleeve installed at the top of the rebar cage, accurately measures the actual vertical distance between the upper end face of the rebar cage and the ground plane. This actual distance is compared with the pile top elevation value in the design drawing to determine whether the rebar cage is properly installed. After the measurement is completed, the pile top elevation meter can be removed for reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the installation structure of the pile top elevation measuring device according to an embodiment of the present utility model;

[0018] Figure 2This is a structural schematic diagram of a pile top elevation measuring device according to an embodiment of the present utility model.

[0019] In the figure: 101 - steel cage; 201 - soil; 301 - vertical hole; 401 - threaded sleeve; 501 - rod; 502 - distance meter; 503 - limit plate; 504 - sliding plate; 505 - straightedge; 601 - mounting ring; 602 - spring; 701 - limit block; 801 - binding rope; 901 - steel casing; 1001 - clamping ring; 1101 - ground plane. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0021] See also Figure 1 and Figure 2 , the utility model provides a technical solution:

[0022] A visual reinforcement cage pile top elevation control device, the reinforcement cage 101 is vertically suspended and installed in a vertical hole 301 in the soil 201. During construction, the verticality of the reinforcement cage 101 in the vertical hole 301 must be ensured, and the following installation methods can be used: Figure 1 As shown, a steel casing 901 with an inner diameter larger than the outer diameter of the rebar cage 101 is first installed in the vertical hole 301, ensuring that the upper end surface of the steel casing 901 does not protrude above the ground plane 1101. Several retaining rings 1001 are then installed on the outer surface of the rebar cage 101, and the rebar cage 101 can then be placed in the vertical hole 301 (the steel casing 901). The presence of the retaining rings 1001 between the rebar cage 101 and the steel casing 901 allows the rebar cage 101 to remain in one position within the steel casing 901, maintaining a suspended position. The bottom of the rebar cage 101 does not contact the bottom of the vertical hole 301, facilitating subsequent adjustment of the rebar cage 101's position within the vertical hole 301.

[0023] A threaded sleeve 401 is installed at the top of the steel cage 101. The upper end surface of the threaded sleeve 401 is coplanar with the upper end surface of the steel cage 101. The threaded sleeve 401 is threadedly connected to a pile top elevation measuring device. The pile top elevation measuring device includes a rod 501, the lower end of which is threadedly connected to the threaded sleeve 401, and a rangefinder 502, a positioning mechanism, and a limit plate 503 installed on the rod 501 in order from top to bottom. The measuring direction of the rangefinder 502 is parallel to the central axis of the rod 501, and the upper surface of the limit plate 503 is perpendicular to the measuring direction of the rangefinder 502. The positioning mechanism is designed to facilitate the measurement of the vertical distance of the rod 501 protruding from the ground plane 1101.

[0024] Specifically, in this embodiment, the positioning mechanism includes a sliding plate 504 slidably mounted on the rod 501 and at least one ruler 505 hingedly connected to the sliding plate 504. When the ruler 505 is in one of its extreme positions, its extension direction is perpendicular to the central axis of the rod 501. The cross-section of the ruler 505 is a regular polygon with an even number of sides. The side of the ruler 505 proximal to the rangefinder 502 is parallel to the upper surface of the limit plate 503. This structure of the ruler 505 facilitates the rangefinder 502 in measuring the distance between itself and the ruler 505.

[0025] To ensure that the straightedge 505 remains firmly against the ground and to prevent the sliding plate 504 from sliding freely on the rod 501, a mounting ring 601 is mounted on the upper end of the rod 501. The mounting ring 601 is positioned between the distance meter 502 and the sliding plate 504. The sliding plate 504 and the mounting ring 601 are connected by a spring 602. Once the rod 501 is connected to the threaded sleeve 401, the straightedge 505 moves downward, driven by the sliding plate 504, until it contacts the ground 1101. Once the straightedge 505 contacts the ground 1101, the spring 602 maintains the straightedge 505 in contact with the ground.

[0026] In this embodiment, there are four rulers 505 , and the four rulers 505 are distributed in a ring array around the central axis of the rod body 501 .

[0027] To limit the rotation of the four rulers 505, four stoppers 701 are mounted in a circular array on the edge of the sliding plate 504. Each of the four stoppers 701 corresponds to a corresponding one-to-one relationship between the four rulers 505. When the four rulers 505 rotate to abut against the stoppers 701, they are unable to rotate further. At this point, the extension direction of any ruler 505 is perpendicular to the central axis of the rod 501.

[0028] In order to store the tool after the measurement is completed, a binding rope 801 is installed on the top of the rod body 501. After the measurement is completed, the four rulers 505 are respectively placed on the rod body 501, and then the binding rope 801 is used to fix the four rulers 505 on the rod body 501.

[0029] Working principle:

[0030] After the steel cage 101 is vertically installed in the vertical hole 301 (steel casing 901), the measurement work can begin.

[0031] like Figure 1 As shown, first, thread the lower end of the rod 501 into the threaded sleeve 401, and align the lower end of the stop plate 503 with the upper end of the threaded sleeve 401. Then, rotate the four rulers 505 on the sliding plate 504 until they are horizontally extended. Under the elastic force of the spring 602, the sliding plate 504 moves downward until the four rulers 505 abut the ground plane 1101. Then, use the distance meter 502 to begin measurement:

[0032] In the first step, the distance meter 502 measures the vertical distance between itself and the upper surface of the ruler 505, and this distance value is recorded as L1;

[0033] Step 2: Rotate the sliding plate 504 to a certain angle so that the ruler 505 does not interfere with the distance measurement between the distance meter 502 and the upper surface of the limit plate 503. The distance meter 502 then measures the vertical distance between itself and the upper surface of the limit plate 503, which is recorded as L2. Simultaneously, the thickness of the ruler 505 is recorded as L3 (a known value), and the thickness of the limit plate 503 is recorded as L4 (a known value).

[0034] Step 3: Calculate the actual vertical distance (L3) between the upper end surface of the steel cage 101 and the ground plane 1101: L3 = L2 - L1 - L3 + L4. This L3 value is the actual vertical distance between the upper end surface of the steel cage 101 and the ground plane 1101.

[0035] The L3 value is then compared with the pile top elevation in the design drawing. If the L3 value is greater than the indicated pile top elevation, the rebar cage 101 is pulled upward until the L3 value equals the indicated pile top elevation. If the L3 value is less than the indicated pile top elevation, the rebar cage 101 is pushed toward the bottom of the vertical hole 301 until the L3 value equals the indicated pile top elevation. Once the rebar cage 101 is positioned correctly, the pile top elevation measuring device can be removed.

[0036] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A visual reinforcement cage pile top elevation control device, wherein a reinforcement cage (101) is vertically suspended and installed in a vertical hole (301) in a soil body (201), a threaded sleeve (401) is provided on the top of the reinforcement cage (101), and the upper end surface of the threaded sleeve (401) is coplanar with the upper end surface of the reinforcement cage (101); characterized in that: The threaded sleeve (401) is threadedly connected to a pile top elevation measuring device, and the pile top elevation measuring device comprises a rod body (501) whose lower end is threadedly connected to the threaded sleeve (401), and a distance meter (502), a positioning mechanism, and a limit plate (503) which are sequentially arranged on the rod body (501) from top to bottom. The measuring direction of the distance meter (502) is parallel to the central axis of the rod body (501), and the upper surface of the limit plate (503) is perpendicular to the measuring direction of the distance meter (502).

2. A visual reinforcement cage pile top elevation control device according to claim 1, characterized in that: The positioning mechanism comprises a sliding disk (504) slidably arranged on the rod body (501) and at least one ruler (505) hinged to the sliding disk (504); when the ruler (505) is in one of its extreme positions, its extension direction is perpendicular to the central axis of the rod body (501); the cross section of the ruler (505) is a regular polygon with an even number of sides, and the side of the ruler (505) close to the rangefinder (502) is parallel to the upper surface of the limit plate (503).

3. A visual reinforcement cage pile top elevation control device according to claim 2, characterized in that: The upper end of the rod body (501) is provided with a mounting ring (601), the mounting ring (601) is located between the rangefinder (502) and the sliding disk (504), and the sliding disk (504) and the mounting ring (601) are connected via a spring (602).

4. A visual reinforcement cage pile top elevation control device according to claim 2, characterized in that: The number of the rulers (505) is four, and the four rulers (505) are distributed in a ring array around the central axis of the rod body (501).

5. A visual reinforcement cage pile top elevation control device according to claim 4, characterized in that: The edge ring array of the sliding disk (504) is provided with four limit blocks (701), and the four limit blocks (701) correspond one to one with the four rulers (505).

6. The visual reinforcement cage pile top elevation control device according to claim 1 is characterized in that: A binding rope (801) is provided at the top end of the rod body (501).

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