Anchor rod capsule high-pressure jet grouting reaming diameter measuring device

Abstract

The utility model provides an anchor rod capsule high-pressure jet grouting reaming diameter measuring device, and belongs to the technical field of building construction, the anchor rod capsule high-pressure jet grouting reaming diameter measuring device comprises a main body structure, the main body structure is a slender tubular structure, the outer wall of the main body structure is provided with a ruler, the ruler can slide up and down in the axial direction of the main body structure, and scales are engraved on the ruler; two measuring arms are hinged to the lower end of the scale, the two measuring arms are two rigid rod pieces with the same length and are symmetrically arranged with the scale as the axis, and the fixed ends of the two measuring arms are hinged to the same position of the main body structure; the hole bottom diameter which is difficult to directly measure is converted into the ruler linear displacement which is easy to measure by utilizing a geometrical relationship and mechanical linkage, and the diameter of a reamed hole at the bottom of the anchor rod can be accurately measured on the ground, so that the reamed hole quality is evaluated, and whether the anchor rod needs to be lowered or not is judged; moreover, the measuring arm can be folded, so that the device is small in occupied space and convenient to carry.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a device for measuring the diameter of a high-pressure jet grouting bore in an anchor bolt bladder. Background Technology

[0002] In recent years, with the rapid development of the construction industry, the development of urban underground space has become more common. Many projects encounter areas with abundant groundwater, which can exert significant and harmful buoyancy on buildings. Anti-buoyancy anchors are one type of anti-buoyancy measure for underground structures in building engineering. Unlike ordinary foundation piles, anti-buoyancy anchors have unique properties. The biggest difference is that foundation piles are typically compressive, bearing the pressure of the building load, with the force transmitted from the top to the bottom of the pile, and the magnitude of the force changing with the building load; while anti-buoyancy anchors bear tensile force, and the magnitude of the force changes with the groundwater level. The force mechanisms of the two are exactly opposite. The key to the anchor's load-bearing capacity lies in the cement-filled slurry-containing capsule anchored in the bottom soil. This capsule expands by injecting cement slurry, forming an expansion body with a diameter much larger than the anchor rod itself to meet the anchoring requirements. If the high-pressure jet grouting hole expansion quality is substandard, the soil cannot be jetted out with sufficient space, thus the anchor bolt capsule cannot be fully expanded, resulting in insufficient anchoring force and failure of the anchor bolt.

[0003] Therefore, there is an urgent need for a method to determine the diameter of the jet grouting hole at the bottom of the anchor bolt in order to judge whether the hole quality is up to standard. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to address the shortcomings of existing technologies by providing a high-pressure jet grouting bore diameter measuring device for anchor bolt bodies. This device utilizes geometric relationships and mechanical linkage to transform the difficult-to-measure bore diameter into an easily measurable linear displacement of a scale. It can accurately measure the diameter of the bore at the bottom of the anchor bolt on the ground, thereby evaluating the bore diameter quality and determining whether the anchor bolt should be lowered. Furthermore, the device can retract its measuring arm, occupying little space and being easy to carry.

[0005] Technical solution: The present invention provides a high-pressure jet grouting bore diameter measuring device for anchor bolt bladders, comprising a main structure, which is a slender tubular structure. A scale is provided on the outer wall of the main structure, which can slide up and down along the axial direction of the main structure. The scale is engraved with graduations. Two measuring arms are hinged to the lower end of the scale. The two measuring arms are two rigid rods of equal length, symmetrically arranged about the scale axis. The fixed ends of the two measuring arms are hinged to the same position of the main structure.

[0006] The main structure is the skeleton and guide component of the entire device, and the bottom end is the reference point for lowering. The upper end of the measuring arm, that is, the end closest to the bottom end, is hinged to the same point on the main structure. The lower end of the measuring arm is the contact point for sensing the hole wall. The middle part of the measuring arm is hinged to the lower end of the scale. This hinge point is the key point for converting the movement of the scale into the rotation of the measuring arm.

[0007] Furthermore, the ruler slides on the main structure via a ruler guide mechanism, which ensures that the ruler can only slide up and down along the axial direction of the main structure.

[0008] Furthermore, the scale guiding mechanism includes an axial groove on the main structure and a slider on the scale. The slider is embedded in the axial groove to form a sliding pair, and the slider can only move within the axial groove and cannot rotate or move laterally. The core of the scale guiding mechanism is precise linear motion constraint. Through the sliding pair formed by the axial groove and the slider, the accuracy of the measurement structure and the smoothness of operation can be guaranteed.

[0009] Furthermore, the scale is reset via a reset mechanism, which can retract the measuring arm to reduce space occupation.

[0010] Furthermore, the reset mechanism includes a compression spring, which is sleeved on the outside of the scale. The upper end of the compression spring rests against the end cap inside the main structure, and the lower end rests against the retaining ring on the scale. Under normal conditions, the compression spring keeps the scale at its upper limit position in the main structure. When the scale moves downward, the lower end of the compression spring moves downward as well. When the external force is removed, the compressed spring moves upward, thereby resetting the scale. The upper limit is naturally limited by the fully extended compression spring, and the lower limit is limited by the limiting ring at the lower end of the scale. The spring force must be sufficient to overcome the frictional force when the measuring arm retracts, the frictional force between the scale and the guide mechanism, and gravity. The core of the reset mechanism is to use spring energy storage to achieve one-button reset. Its connection is essentially that the two ends of the spring are anchored to the main structure (fixed end) and the scale (moving end), respectively. Through the conversion from linear motion to rotational motion, the automatic retraction of the measuring arm and the zeroing of the scale are completed.

[0011] Furthermore, when the scale is at the upper limit position of the main mechanism, the measuring arm is parallel to the axis of the main structure; when the scale leaves the upper limit position of the main mechanism, the direction of movement of the scale is coaxial with the axis of the main structure.

[0012] Furthermore, the middle part of the measuring arm is hinged to the lower end of the scale via a connecting arm.

[0013] Furthermore, the scale is zeroed when the scale is at its initial position at the upper limit of the main mechanism, and the reading increases as the scale moves downward.

[0014] Beneficial effects: Compared with the prior art, the advantages of the present invention are as follows:

[0015] (1) The present invention, through the design of a retractable measuring arm and a built-in reset mechanism, forms a compact columnar structure in the non-working state, which significantly reduces the space occupied, facilitates downhole carrying and lifting in narrow anchor holes, and greatly improves detection efficiency.

[0016] (2) This invention utilizes geometric relationships and mechanical linkage to transform the hole bottom diameter, which is difficult to measure directly, into a linear displacement of a scale that is easy to measure. This allows for accurate determination of the diameter of the hole at the bottom of the anchor rod on the ground, thereby evaluating the hole enlargement quality and determining whether the anchor rod should be installed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is an exploded diagram of the measurement steps of the present invention. Detailed Implementation

[0019] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0020] like Figure 1 The device for measuring the diameter of a high-pressure jet grouting borehole in an anchor bolt bladder, as shown, includes a main structure 1, which is a slender tubular structure. A scale 2 is provided on the outer wall of the main structure 1. The scale 2 slides up and down in the axial direction of the main structure 1 via a scale guide mechanism. The scale guide mechanism includes an axial groove on the main structure 1 and a slider on the scale 2, with the slider embedded in the axial groove to form a sliding pair. The scale 2 is reset by a reset mechanism, which includes a compression spring. The compression spring is sleeved on the outside of the scale 2, with its upper end pressing against an end cap inside the main structure 1 and its lower end pressing against a retaining ring on the scale 2. Under normal conditions, the compression spring keeps the scale 2 at its upper limit position in the main structure 1. When the scale 2 moves downward, the lower end of the compression spring moves downward as well. When the external force is removed, the compressed spring moves upward, thereby resetting the scale 2.

[0021] The scale 2 is engraved with graduations, with the initial position of the scale 2 at the upper limit position of the main body mechanism 1 as the zero point. The reading increases as the scale 2 moves downward. Two measuring arms 3 are hinged to the lower end of the scale 2. The two measuring arms 3 are two rigid rods of equal length, symmetrically arranged about the scale 2 as the axis. The fixed ends of the two measuring arms 3 are hinged to the same position in the main body structure 1; the middle part of the measuring arms 3 is hinged to the lower end of the scale 2 via a connecting arm 4. When the scale 2 is at the upper limit position of the main body mechanism 1, the measuring arms 3 are parallel to the axis of the main body structure 1; when the scale 2 moves away from the upper limit position of the main body mechanism 1, the direction of movement of the scale 2 is coaxial with the axis of the main body structure 1.

[0022] like Figure 2 As shown, the diagram includes the initial state, the descending state, and the bottoming-out state. In the diagram, A represents the specified depth 6, points C and D are the hinge points of the connecting arm and the measuring arm, and E and F are the contact points between the measuring arm and the borehole wall 5. At this point, the scale moves downwards by a distance Δl. The specified depth 6 is the bottom of the borehole, the scale accuracy is set to millimeters, the length of the connecting arm is 500mm, and the length of the measuring arm is 1000mm.

[0023] Initial state: The measuring arm is close to the main structure and parallel to it. At this time, the scale is at the upper limit position of the main structure.

[0024] In use: Lower the bottom of the measuring device to the bottom of the enlarged hole to be measured. The compression scale guide mechanism forces the two measuring arms to unfold outward around the hinge point between them and the main structure. When the free ends of the two measuring arms simultaneously contact the wall of the enlarged hole, the measuring arms can no longer unfold. At this time, the scale also stops moving downward.

[0025] Reading and Calculation: Record the downward distance Δl that the scale has moved relative to its initial position; calculate the radius R of the enlarged hole using the following formula:

[0026]

[0027] Evaluation and Decision-Making: Based on the calculated diameter, assess whether the hole enlargement quality meets the design requirements and decide whether the anchor bolt can be lowered.

[0028] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A device for measuring the diameter of a high-pressure jet grouting bore in an anchor bolt capsule, characterized in that: Includes a main structure (1), which is a slender tubular structure. A scale (2) is provided on the outer wall of the main structure (1). The scale (2) can slide up and down along the axial direction of the main structure (1). The scale (2) is engraved with graduations. Two measuring arms (3) are hinged to the lower end of the scale (2). The two measuring arms (3) are two rigid rods of equal length, arranged symmetrically with the scale (2) as the axis. The fixed ends of the two measuring arms (3) are hinged to the same position of the main structure (1).

2. The device for measuring the diameter of a high-pressure jet grouting bore in an anchor bolt capsule according to claim 1, characterized in that: The scale (2) slides on the main structure (1) via the scale guide mechanism.

3. The device for measuring the diameter of a high-pressure jet grouting borehole in an anchor bolt capsule according to claim 2, characterized in that: The scale guide mechanism includes an axial long groove on the main structure (1) and a slider on the scale (2), wherein the slider is embedded in the axial long groove to form a sliding pair.

4. The device for measuring the diameter of a high-pressure jet grouting borehole in an anchor bolt capsule according to claim 1, characterized in that: The scale (2) is reset by a reset mechanism.

5. The device for measuring the diameter of a high-pressure jet grouting bore in an anchor bolt capsule according to claim 4, characterized in that: The reset mechanism includes a compression spring, which is sleeved on the outside of the scale (2). The upper end of the compression spring rests on the end cap inside the main structure (1), and the lower end of the compression spring rests on the retaining ring on the scale (2). Under normal conditions, the compression spring keeps the scale (2) at the upper limit position of the main structure (1). When the scale (2) moves down, the lower end of the compression spring moves down accordingly. When the external force is removed, the compressed spring moves up, thereby driving the scale (2) to reset.

6. The device for measuring the diameter of a high-pressure jet grouting borehole in an anchor bolt capsule according to claim 5, characterized in that: When the scale (2) is at the upper limit position of the main structure (1), the measuring arm (3) is parallel to the axis of the main structure (1); when the scale (2) leaves the upper limit position of the main structure (1), the moving direction of the scale (2) is coaxial with the axis of the main structure (1).

7. The device for measuring the diameter of a high-pressure jet grouting borehole in an anchor bolt capsule according to claim 1, characterized in that: The middle part of the measuring arm (3) is hinged to the lower end of the scale (2) via a connecting arm (4).

8. The device for measuring the diameter of a high-pressure jet grouting bore in an anchor bolt capsule according to claim 1, characterized in that: The scale is zeroed when the scale (2) is at the upper limit position of the main structure (1), and the reading increases when the scale (2) moves downward.

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