Cast-in-place pile hole depth measuring device

Abstract

The utility model discloses a cast-in-place pile hole depth measuring device, belonging to the highway engineering technology field, the cast-in-place pile hole depth measuring device comprises a support frame, a fixed frame and a roller rocking bar member, the support frame is n-shaped, the fixed frame is welded on the upper end of the support frame, the fixed frame is n-shaped, the inner part of the fixed frame is rotatably connected with the roller rocking bar member, and the roller rocking bar member is welded on the fixed frame. A measuring rope is bound outside the roller rocker member, and a measuring hammer is fixed at the end of the measuring rope away from the roller rocker member. The device can solve the problems of infirm fixation and inconvenience in use in hole depth measurement of the cast-in-place pile, and is convenient to move, firm and rapid to mount and dismount, convenient in material drawing and simple to manufacture.

Description

Technical Field

[0001] The utility model belongs to the technical field of highway engineering, and particularly relates to a measuring device for the hole depth of cast-in-place piles. Background Art

[0002] According to the "Quality Inspection and Evaluation Standards for Highway Engineering" JTG F80 / 1-2017, the measurement of the hole depth of bored cast-in-place piles is a key item, and its specified value or allowable deviation ≥ the design value, and it is necessary to measure each pile with a sounding rope.

[0003] At present, there are three types of measuring devices for the hole depth of cast-in-place piles. One is a sounding rope plus a sounding weight, and then a simple sounding rope fixing device is fabricated. Another is a handle, a sounding rope, a sounding weight, a transmission device and a roller to form the whole hole depth measuring device. There is also a digital display automatic hole depth reading device. The first simple fabricated device is inconvenient for measurement and placement, and manual operation is not convenient. The second one is relatively convenient during measurement, but there is no reliable fixing device. The third one also has no reliable fixing device and needs to be purchased at a high price. Content of the Utility Model

[0004] The purpose of the utility model is to provide a measuring device for the hole depth of cast-in-place piles, which solves the problems of unreliable fixing and inconvenient use in the measurement of the hole depth of cast-in-place piles. It is convenient to move, the installation and disassembly are firm and fast, the materials are easy to obtain, and the production is simple.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a measuring device for the hole depth of cast-in-place piles, including a support frame, a fixing frame and a drum rocking rod. The support frame is in a "several" shape, the fixing frame is welded to the upper end of the support frame, the fixing frame is in a "匚" shape, the drum rocking rod is rotatably connected inside the fixing frame, a sounding rope is tied outside the drum rocking rod, and a sounding weight is fixed at the end of the sounding rope away from the drum rocking rod.

[0006] In the utility model, the support frame, the fixing frame and the drum rocking rod are all made of φ12 threaded steel bars.

[0007] Further, the drum rocking rod includes circular hoops. There are two circular hoops, and several connecting rods are welded between the two circular hoops. Reinforcing ribs are welded inside the circular hoops, and a rocker is welded to the side of the reinforcing rib inside one of the circular hoops.

[0008] Further, a nut is welded to the side of the fixing frame, one of the circular hoops is rotatably connected inside the nut, and the other circular hoop rotates inside the nut through the rocker.

[0009] Further, the sounding rope is provided with scales on the side.

[0010] Further, a limit screw is threadedly connected to the side of the nut close to the rocker, and the screwing end of the limit screw abuts against the side of the rocker.

[0011] The beneficial effects of the utility model are as follows:

[0012] 1. The production materials adopted by the utility model are simple, only requiring threaded steel bars, nuts, and welding machinery, and the materials for processing this device are generally available at general construction sites.

[0013] 2. The utility model has the characteristics of simple processing, convenient movement, firm fixation, and the ability to measure the hole depth at any point of the pile foundation. The fixing frame can be used as a handle, with the characteristic of convenient lifting; when measuring, the support frame can be firmly clamped on the edge of the casing. After the measurement is completed, the support frame can act as a base and be stored on an open ground.

[0014] 3. During measurement, the roller rocker is used for rotation control. When the measuring rope is lowered, the measuring weight falls by gravity. When the weight is retracted, a rocker is used. The connecting rod is welded to the inner side of the hoop, which itself plays a role in restricting the measuring rope from slipping to the side. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the bored pile hole depth measuring device provided by the utility model;

[0016] Figure 2 is provided by the utility model Figure 1 The enlarged schematic diagram at position A in

[0017] In the figure: 1. Support frame; 2. Fixing frame; 3. Measuring rope; 4. Measuring weight; 5. Hoop; 6. Connecting rod; 7. Reinforcing rib; 8. Rocker; 9. Nut; 10. Limit screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To further understand the content, features, and effects of the utility model, the following embodiments are exemplified and described in detail in conjunction with the drawings.

[0019] Please refer to Figure 1 to Figure 2 simultaneously. The bored pile hole depth measuring device of the embodiment of the utility model will be described in detail below with reference to the drawings.

[0020] As Figure 1 shown, the bored pile hole depth measuring device includes a support frame 1, a fixing frame 2, and a roller rocker 8. The support frame 1 is in a "U" shape, the fixing frame 2 is welded to the upper end of the support frame 1, the fixing frame 2 is in a "匚" shape, the roller rocker 8 is rotatably connected inside the fixing frame 2, the measuring rope 3 is tied to the outside of the roller rocker 8, and the end of the measuring rope 3 away from the roller rocker 8 is fixed with a measuring weight 4.

[0021] The roller rocker 8 includes a circular hoop 5, two of which are provided, a number of connecting rods 6 are welded between the two circular hoops 5, and reinforcing ribs 7 are welded inside the circular hoop 5. A rocker 8 is welded on the side of the reinforcing rib 7 inside one of the circular hoops 5, wherein the connecting rod 6, the circular hoop 5 and the reinforcing rib 7 form a roller.

[0022] In addition, a nut 9 is welded on the side of the fixing frame 2, wherein one of the circular hoops 5 is rotatably connected inside the nut 9, and the other circular hoop 5 is inserted into the nut 9 through the rocker 8 to rotate.

[0023] At the same time, a scale is provided on the side of the measuring rope 3 to facilitate intuitive reading of the measurement data.

[0024] A limit screw 10 is threadedly connected to the side of the nut 9 near the rocker 8, and the screw-in end of the limit screw 10 contacts the side of the rocker 8. The screwing in of the limit screw 10 can limit the rotation of the rocker 8, thereby limiting the rotation of the entire roller rocker 8.

[0025] Among them, the circular hoop 5 is bent into a circle with a diameter of 30 cm by φ12 threaded steel bars, and the ends of the circular hoop 5 are welded; two φ12 threaded steel bars are vertically welded at the inner diameter position of each circular hoop 5 as reinforcement ribs 7; 8 φ12 threaded steel bars with a length of 30 cm are welded on the inner side of the circular hoop 5 as connecting rods 6; the rocker 8 is bent into a specific shape with φ12 threaded steel bars and welded to the center of the reinforcement rib 7 of the circular hoop 5.

[0026] Example

[0027] The utility model discloses a bored pile hole depth measuring device for use in expressway bored pile hole depth measurement.

[0028] Xinfujiang Bridge is a new bridge project for the planned Quanguan Expressway. The starting and ending pile numbers of the bridge are: K71+12~K71+766, the number of holes and span are: 80+3*148+80+5*30, and the bridge is 754m long. The bridge has a total of 96 pile foundations. The pile foundation diameters are: Φ1.5m, Φ1.8m, Φ2.0m, Φ2.2m, Φ2.5m, etc.

[0029] The steps of installing and removing the bored pile hole depth measuring device of this embodiment are as follows:

[0030] ① Tie the end of the measuring rope with scale to the middle position of any connecting rod of the drum of the bored pile hole depth measuring device, connect the front end of the measuring rope to the hanging hammer, and calibrate it. The calibration is based on the 1m distance from the front end.

[0031] ② Stir the rocker to attach all the measuring ropes to the drum.

[0032] ③ Lift the entire device onto the casing, and clamp the opening of the support frame onto the edge of the casing. Once it is firmly fixed, you can start measuring.

[0033] ④ Release the measuring hammer, which will fall freely due to gravity and take the reading after it reaches the bottom of the hole.

[0034] ⑤ The reading is to tighten the measuring rope and hold it vertically. If the hole depth at other points of the pile foundation needs to be measured, a pile foundation inspection platform can be set up. The measuring rope can be moved arbitrarily by hand, and the bored pile hole depth measuring device remains fixed in place and does not need to be moved.

[0035] ⑥After the reading is completed, stir the rocker to retract the measuring rope and hammer.

[0036] ⑦ After the measuring rope and hammer are recovered, remove the bored pile hole depth measuring device from the edge of the casing and place it in an open area. Its support frame can also serve as a base, so that the device can be placed firmly on the flat ground.

[0037] After removing the bored pile hole depth measuring device, the hole depth results were tested. The test results are shown in Table 1:

[0038] Table 1 Results of hole depth test on pile foundation No. 2-8 of Xinfujiang Bridge on Quanguan Expressway

[0039] project Allowable deviation (m) Measured deviation(m) Measurement location Hole Depth ≥ Design value ﹢0.08 Pile Foundation Center Hole Depth ≥ Design value ﹢0.08 90 degree direction Hole Depth ≥ Design value ﹢0.06 90 degree direction Hole Depth ≥ Design value ﹢0.08 90 degree direction Hole Depth ≥ Design value ﹢0.07 90 degree direction

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bored pile hole depth measuring device, characterized in that: The bored pile hole depth measuring device includes a support frame (1), a fixing frame (2) and a roller rocker (8). The support frame (1) is in a "several" shape. The fixing frame (2) is welded to the upper end of the support frame (1). The fixing frame (2) is in a U shape. The roller rocker (8) is rotatably connected inside the fixing frame (2). A measuring rope (3) is tied to the outside of the roller rocker (8). A measuring weight (4) is fixed to the end of the measuring rope (3) away from the roller rocker (8).

2. The bored pile hole depth measuring device according to claim 1, characterized in that: The roller rocker (8) includes circular hoops (5). There are two circular hoops (5). A number of connecting rods (6) are welded between the two circular hoops (5). Reinforcing ribs (7) are welded inside the circular hoops (5). A rocker (8) is welded to the side of the reinforcing rib (7) inside one of the circular hoops (5).

3. The bored pile hole depth measuring device according to claim 2, characterized in that: A nut (9) is welded to the side of the fixing frame (2). One of the circular hoops (5) is rotatably connected inside the nut (9). The other circular hoop (5) rotates inside the nut (9) through the rocker (8).

4. The bored pile hole depth measuring device according to claim 1, characterized in that: The side of the measuring rope (3) is provided with scales.

5. The bored pile hole depth measuring device according to claim 3, characterized in that: A limit screw (10) is threadedly connected to the side of the nut (9) near the rocker (8). The screwing-in end of the limit screw (10) abuts against the side of the rocker (8).

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