Tool for measuring thickness of sediment at hole bottom of hole-forming pile
By designing a drilling pile bottom sediment thickness measurement tool including limit sleeves, measuring hammers, spring keys and pull ropes, the misjudgment problem of subjective judgments based on hand feeling and experience in the prior art is solved, and the problem of "unresponsible judgment" is realized. More accurate and reliable sediment thickness measurements.
Patent Information
- Application Number
- CN202420985615.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-08
AI Technical Summary
The existing drilling pile bottom sediment thickness measurement tools rely on the engineer's experience and feel to make subjective judgments, and there is a high possibility of misjudgment.
A tool for measuring thickness of the bottom sediment of holes in the hole is designed, including a limit sleeve, a measuring hammer, a spring key and a pull rope. The measuring hammer is movably arranged in the limit sleeve, and the conical head structure allows it to sink by its own weight. The spring key is in contact with the inner wall of the limit sleeve for elastic contact. When the sediment thickness exceeds the specification requirements, the spring key is released and ejected, hindering measurement. The hammer retracts into the limit sleeve. The engineer recycles the measurement hammer by pulling ropes and observes whether the spring keys pop up to determine whether the sediment thickness is qualified.
By observing whether the spring key on the measurement hammer pops up, we can objectively judge whether the sediment thickness meets the specifications, avoid subjective judgments that rely on hand feel and experience, and improve the accuracy and reliability of the measurement.
Smart Images
Figure CN222460534U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a tool for measuring the thickness of sediment at the bottom of a bored pile hole, belonging to the field of building measuring tools. Background Art
[0002] The sediment at the bottom of bored piles is a loose structure. The presence of sediment or loose soil at the bottom of the hole is an important factor affecting the bearing capacity and foundation consistency of bored piles. When thick sediment remains at the bottom of the hole, the stiffness of the bottom of the pile will decrease, and the allowable bearing capacity will decrease. Therefore, the quality of hole cleaning and the measurement of the thickness of sediment at the bottom of the hole are indispensable links in the construction of bored piles. The Technical Specifications for Building Pile Foundations in the construction specifications clearly stipulate the sediment thickness h after boring pile hole cleaning, that is, the sediment thickness for end bearing piles should not be greater than 50mm, and the sediment thickness for friction piles should not be greater than 100mm.
[0003] The existing tools for measuring the thickness of the sediment at the bottom of the bored pile hole generally use a 50-meter measuring rope with a measuring hammer tied at the lower end. The measuring hammer is in the shape of a short strip, and generally uses 2-4 short steel bars with a diameter of about 2 cm that are welded together. When measuring, the engineer who measures the sediment repeatedly lowers and raises the measuring rope by hand, so that the measuring hammer repeatedly penetrates and then pulls out the sediment layer vertically, and feels the resistance of the sediment layer in this process, and thus judges the thickness of the sediment layer by feel and experience.
[0004] However, due to various geological conditions, the particle size, viscosity and composition of the sediment at the bottom of each pile hole vary greatly, and the resistance of the sediment at the bottom of each hole to the short steel bar hammer is not the same.
[0005] Therefore, the existing bored pile bottom sediment thickness measurement tools can only be used for subjective judgment based on the engineer's feel and experience, but cannot be used for objective measurement and judgment, which has a great possibility of misjudgment. Utility Model Content
[0006] In order to solve the above problems existing in the prior art, the utility model provides a tool for measuring the thickness of sediment at the bottom of a bored pile hole.
[0007] The technical solution of the utility model is as follows:
[0008] A tool for measuring the thickness of sediment at the bottom of a bored pile, comprising:
[0009] A limiting sleeve, wherein the top end of the limiting sleeve is closed and provided with a rope hole, the bottom end of the limiting sleeve is open and the outer wall is provided with a limiting baffle;
[0010] A measuring hammer, which is movably disposed in a limiting sleeve, and has a cone head structure at its bottom;
[0011] A spring key, the spring key being arranged on the side wall of the measuring hammer and being in elastic contact with the inner wall of the limiting sleeve; when the measuring hammer moves downward relative to the limiting sleeve until the spring key and the limiting sleeve are out of elastic contact, the spring key is released and pops out, preventing the measuring hammer from retracting into the limiting sleeve;
[0012] A pulling rope, one end of which passes downward through the rope hole and is connected to the top end of the measuring hammer.
[0013] Preferably, a lifting ring is fixedly provided on the top of the measuring hammer, and the connecting end of the pulling rope is tied and connected to the lifting ring.
[0014] Preferably, the spring key is a wedge-shaped structure, with the narrow end arranged downward.
[0015] Preferably, the distance between the cone head structure at the bottom of the measuring hammer and the top of the spring key is the maximum standard thickness of the sediment required to be measured.
[0016] Preferably, at least two rollers which are spaced apart and arranged in parallel are rotatably provided on the outer wall of the measuring hammer on the other side relative to the spring key.
[0017] The utility model has the following beneficial effects: during the use of the device, it is only necessary to observe whether the spring key of the measuring hammer pops out to judge whether the sediment thickness is qualified or not, and it is not necessary to rely on the experience and feel of engineers to make subjective judgments on whether it is qualified or not. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a front view of a tool for measuring the thickness of sediment at the bottom of a bored pile hole according to the utility model;
[0019] Figure 2 The utility model is a schematic diagram of the use status of a tool for measuring the thickness of sediment at the bottom of a bored pile. DETAILED DESCRIPTION
[0020] 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 of 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.
[0021] Example:
[0022] See also Figure 1 A tool for measuring the sediment thickness at the bottom of a bored pile comprises a limiting sleeve 1, a measuring hammer 2, a roller 3, a spring key 4, and a pulling rope 5.
[0023] Among them, the top of the limiting sleeve 1 is closed and has a rope hole 101, the bottom of the limiting sleeve 1 is open and the outer wall is provided with a limiting baffle 102, the limiting baffle 102 is a horizontal plate structure, and the buoyancy generated by its area on the sediment plane needs to be sufficient to bear the gravity of other structures.
[0024] Among them, the measuring hammer 2 can be movably arranged in the limiting sleeve 1, and the bottom of the measuring hammer 2 is a cone head structure 201. The cone head structure 201 can facilitate the measuring hammer 2 to continue to sink in the sediment layer by relying on its own weight when there is no lifting effect of the pulling rope 5.
[0025] Among them, the spring key 4 is arranged on the side wall of the measuring hammer 2 and is elastically pressed against the inner wall of the limiting sleeve 1; the spring key 4 is a wedge-shaped structure, and the narrow end is arranged downward. The spring key 4 is similar to the spring limiting device structure on the umbrella pole, and its specific structure and installation method are not further described; when the measuring hammer 2 moves down relative to the limiting sleeve 1 until the spring key 4 and the limiting sleeve 1 are out of elastic contact, the spring key 4 releases the pressure and pops out, preventing the measuring hammer 2 from retracting into the limiting sleeve 1; the distance from the cone head structure 201 at the bottom of the measuring hammer 2 to the top of the spring key 4 is the maximum standard thickness of the sediment required to be measured.
[0026] In order to reduce the friction resistance between the measuring hammer 2 and the inner wall of the limiting sleeve 1, at least two rollers 3 distributed in parallel and at intervals are rotatably arranged on the outer wall on the other side of the measuring hammer 2 relative to the spring key 4, so as to reduce the resistance by rolling contact, which is beneficial to the sinking of the measuring hammer 2; the roller 3 is similar to the roller structure at the bottom of the sliding door, and its specific structure and installation method will not be further described.
[0027] Specifically, one end of the pulling rope 5 passes downward through the rope hole 101 and is connected to the top of the measuring hammer 2. A lifting ring 202 is fixedly provided on the top of the measuring hammer 2. The connecting end of the pulling rope 5 is tied and connected to the lifting ring 202 for releasing / lifting the device.
[0028] The working principle of this utility model:
[0029] like Figure 1-2 As shown, during use, the measuring tool is Figure 1 As shown in the prefabrication, it is put into the empty hole mud and the device is released by pulling the rope 5. When the measuring tool touches the sediment at the bottom of the hole, the limit baffle 102 of the limit sleeve 1 will be blocked by the sediment and cannot move, and the cone head structure 201 of the measuring hammer 2 will use the deadweight of the measuring hammer 2 to penetrate into the sediment layer and sink further, so that the measuring hammer 2 and the limit sleeve 1 move relative to each other. If the sediment thickness exceeds the specification requirements, the measuring hammer 2 moves down relative to the limit sleeve 1 until the spring key 4 is out of spring-pressed contact with the limit sleeve 1, and the spring key 4 releases the pressure and pops out, preventing the measuring hammer 2 from retracting into the limit sleeve 1. The engineer only needs to retrieve the device by pulling the rope 5 and observe whether the spring key 4 on the retrieved measuring hammer 2 pops out to determine whether the sediment thickness is qualified.
[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A tool for measuring the thickness of sediment at the bottom of a bored pile, characterized by: include A limiting sleeve (1), wherein the top end of the limiting sleeve (1) is closed and provided with a rope hole (101), and the bottom end of the limiting sleeve (1) is open and the outer wall is provided with a limiting baffle (102); A measuring hammer (2), the measuring hammer (2) being movably disposed in the limiting sleeve (1), and the bottom of the measuring hammer (2) being a cone head structure (201); A spring key (4), wherein the spring key (4) is arranged on the side wall of the measuring hammer (2) and is in elastic contact with the inner wall of the limiting sleeve (1); when the measuring hammer (2) moves downward relative to the limiting sleeve (1) until the spring key (4) and the limiting sleeve (1) are out of elastic contact, the spring key (4) releases pressure and pops out, preventing the measuring hammer (2) from retracting into the limiting sleeve (1); A pulling rope (5), one end of which passes downward through the rope hole (101) and is connected to the top end of the measuring hammer (2).
2. A bored pile bottom sediment thickness measuring tool according to claim 1, characterized in that: A lifting ring (202) is fixedly provided on the top end of the measuring hammer (2), and the connecting end of the pulling rope (5) is tied and connected to the lifting ring (202).
3. A tool for measuring the thickness of sediment at the bottom of a bored pile according to claim 1, characterized in that: The spring key (4) is a wedge-shaped structure, with the narrow end arranged downward.
4. A tool for measuring the thickness of sediment at the bottom of a bored pile according to claim 1, characterized in that: The distance between the cone head structure (201) at the bottom of the measuring hammer (2) and the top of the spring key (4) is the maximum standard thickness of the sediment required for measurement.
5. A tool for measuring the thickness of sediment at the bottom of a bored pile according to claim 1, characterized in that: At least two rollers (3) arranged in parallel and spaced relation are rotatably arranged on the outer wall of the measuring hammer (2) on the other side relative to the spring key (4).