Measuring hammer for measuring thickness of sediment at bottom of bored pile

Abstract

The utility model discloses a measuring hammer for measuring the thickness of sediment at the bottom of a bored pile, which comprises a conical measuring hammer, a cavity is arranged in the measuring hammer, a balancing weight is arranged in the cavity, a partition plate is arranged at the upper part of the balancing weight, a fixing plate is arranged at the top of the measuring hammer, and the top of the measuring hammer is provided with a fixing plate. A circular hole is formed in the middle of the fixing plate and located on the upper portion of the cavity, a connecting ring is installed on the upper portion of the partition plate and corresponds to the circular hole, a rope is installed on the upper portion of the connecting ring, the middle of the rope is installed in the middle of the circular hole in a penetrating mode, and a balancing weight in the cavity is used for increasing the overall weight of the measuring hammer. The rope of which the joint is arranged in the measuring hammer can enable the gravity center to be more stable when the measuring hammer falls down; through cooperation of the built-in balancing weight at the rope joint, direct contact between the rope joint and the external environment is avoided, shaking caused by the influence of external reasons on the measuring hammer can be effectively reduced, the relative stability of the measuring hammer is maintained, and the measuring accuracy of the measuring hammer is ensured.

Description

Technical Field

[0001] This utility model relates to the field of measuring hammer technology, specifically a measuring hammer for measuring the thickness of sediment at the base of a drilled pile. Background Technology

[0002] A measuring hammer, used to measure the thickness of sediment at the base of a bored pile, is a specialized tool for detecting the thickness of sediment at the bottom of the pile. It typically consists of a hammer body and a measuring rope. The hammer body is generally conical or cylindrical, usually made of metal, and has sufficient weight to allow it to sink smoothly to the bottom of the hole. The measuring rope is usually a high-strength rope with graduations to measure the depth to which the hammer is lowered. Accurately measuring the thickness of sediment at the base of a bored pile is crucial for ensuring the pile's bearing capacity and stability. Excessive sediment thickness reduces the contact area between the pile tip and the foundation soil, hindering the effective exertion of end resistance and thus affecting the pile's bearing capacity. This can potentially lead to uneven settlement and other problems during the building's operation.

[0003] By lowering the measuring hammer to the bottom of the bored pile under its own weight, the depth from the borehole opening to the bottom can be accurately measured using the markings on the measuring rope. Comparing this depth with the designed borehole depth, the difference represents the thickness of the sediment, providing accurate data for determining whether the sediment meets construction requirements. During the lowering of the measuring hammer and its contact with the bottom of the borehole, operators can roughly judge the softness and distribution of the sediment at the bottom of the borehole based on feel and feedback from the hammer, thus helping to understand the geological conditions at the bottom of the borehole.

[0004] According to authorization announcement number CN 210342019 U, a device for measuring the thickness of sediment at the base of bored cast-in-place piles is disclosed, belonging to the field of building construction. It includes a measuring rope, a lifting ring, a helical rod, a measuring plate, and a measuring needle. The measuring rope has graduations, and the lifting ring is connected to the bottom of the rope. The helical rod is connected to the bottom of the lifting ring and has external threads. A support frame is connected to the upper surface of the measuring plate, and an adjusting ring is connected to the top of the support frame. The adjusting ring is threadedly connected to the helical rod. The measuring needle is connected to the bottom of the helical rod.

[0005] Existing measuring hammers are prone to shaking during use, which may cause them to fail to accurately reach the target position and result in large errors in the measurement results. Therefore, there is a need for a measuring hammer for measuring the thickness of sediment at the base of bored piles. Utility Model Content

[0006] The purpose of this utility model is to provide a measuring hammer for measuring the thickness of sediment at the base of a bored pile. By using a counterweight and a rope connected inside the measuring hammer, the hammer falls more stably, thus solving the technical problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A measuring hammer for measuring the thickness of sediment at the base of a bored pile includes a conical measuring hammer body, the inside of which is provided with a cavity, a counterweight is installed inside the cavity, and a partition is installed on the upper part of the counterweight.

[0009] A fixing plate is installed on the top of the measuring hammer body. A circular hole is opened in the middle of the fixing plate at the upper part of the cavity. A connecting ring is installed on the upper part of the partition corresponding to the circular hole. A rope is installed on the upper part of the connecting ring. The middle part of the rope passes through the middle of the circular hole.

[0010] Preferably, the top of the measuring hammer body is provided with a mounting groove, and the fixing plate is installed inside the mounting groove.

[0011] Preferably, the outer arc surface of the measuring hammer body is provided with several sets of grooves at equal intervals, and the openings of the several sets of grooves are all facing downwards.

[0012] Preferably, the fixing plate has two sets of threaded holes symmetrically opened on both sides of the circular hole in the middle of the fixing plate. Each set of threaded holes has a fixing bolt installed through the middle of the measuring hammer body, and the bottom of both sets of fixing bolts extends into the cavity.

[0013] Preferably, a deformation groove is provided at the bottom of the measuring hammer body, and a buffer component is installed in the middle of the deformation groove.

[0014] Preferably, the buffer assembly includes a buffer plate installed inside the deformation groove, a spring installed at the bottom of the buffer plate, and a buffer head installed at the bottom end of the spring.

[0015] Preferably, a rubber pad is installed at the bottom of the buffer head, and the bottom end of the buffer head extends to the lower part of the measuring hammer body.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The counterweight inside the cavity increases the overall weight of the measuring hammer. The rope, with its connection point inside the measuring hammer, makes the center of gravity more stable and the verticality better when the measuring hammer falls. By cooperating with the counterweight inside the rope connection point, the rope connection point is prevented from directly contacting the external environment, which can effectively reduce the shaking caused by external factors, maintain the relative stability of the measuring hammer, and ensure the accuracy of the measuring hammer measurement. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the measuring hammer body of this utility model;

[0020] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is a schematic diagram of the fixing plate structure of this utility model.

[0022] In the diagram: 1. Measuring hammer body; 2. Cavity; 3. Counterweight; 4. Partition plate; 5. Mounting groove; 6. Fixing plate; 7. Circular hole; 8. Connecting ring; 9. Rope; 10. Groove; 11. Threaded hole; 12. Fixing bolt; 13. Deformation groove; 14. Buffer assembly; 141. Buffer plate; 142. Spring; 143. Buffer head; 144. Rubber pad. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides: a measuring hammer for measuring the thickness of sediment at the base of a bored pile, such as... Figures 1-4 As shown, the measuring hammer includes a conical measuring hammer body 1, with a cavity 2 inside. A counterweight 3 is installed inside the cavity 2, and a baffle 4 is installed on the upper part of the counterweight 3. When measuring the thickness of sediment at the base of a drilled pile, the conical measuring hammer body 1, due to its shape advantage, can more easily maintain a vertical position in the borehole, making the measurement more accurate. The internal counterweight 3 increases the overall weight and stability of the measuring hammer, allowing it to stabilize more quickly and reduce swaying even when affected by factors such as water flow or uneven borehole walls during the insertion into the borehole, thereby improving the accuracy of the sediment thickness measurement data. The baffle 4 installed on the upper part of the counterweight 3 serves to fix the counterweight 3.

[0025] A fixing plate 6 is installed on the top of the measuring hammer body 1. A circular hole 7 is opened in the middle of the fixing plate 6 at the upper part of the cavity 2. A connecting ring 8 is installed on the upper part of the partition plate 4 corresponding to the circular hole 7. A rope 9 is installed on the upper part of the connecting ring 8. The middle part of the rope 9 is installed through the middle of the circular hole 7. The circular hole 7 in the middle of the fixing plate 6 at the upper part of the cavity 2 cooperates with the connecting ring 8 installed on the upper part of the partition plate 4, making the installation and positioning of the rope 9 precise and easy. The circular hole 7 provides a precise path for the rope 9 to pass through, allowing construction personnel to quickly and accurately pass the rope 9 through the circular hole 7 and connect it to the connecting ring 8, greatly improving the efficiency of measuring hammer assembly. The connection method of the rope 9 through the circular hole 7 and the connecting ring 8 ensures the stability of the measuring hammer during the vertical lowering process, preventing the rope 9 from shifting or shaking at the top of the measuring hammer body 1, thereby ensuring the accuracy of the measurement data.

[0026] Preferably, the top of the measuring hammer body 1 is provided with a mounting groove 5, and the fixing plate 6 is installed inside the mounting groove 5. The mounting groove 5 on the top of the measuring hammer body 1 provides precise positioning for the installation of the fixing plate 6. This precise positioning and installation method ensures that the fixing plate 6 is accurately fixed in the top position of the measuring hammer body 1, avoiding structural instability caused by installation deviation.

[0027] Furthermore, the outer arc surface of the measuring hammer body 1 is provided with several sets of grooves 10 at equal intervals, all with their openings facing downwards. These grooves 10 efficiently retain the sediment as the measuring hammer is lowered to the bottom of the pile and enters the pile bottom sediment. Because the openings face downwards, the stone debris trapped in the grooves 10 will not easily fall out when the measuring hammer is lifted. When the construction personnel remove the measuring hammer from the hole, they can directly and accurately determine the thickness of the pile bottom sediment by observing the position of the stone debris in the grooves 10, providing a clear and reliable basis for the measurement work and greatly improving the accuracy of the measurement results.

[0028] Furthermore, the fixing plate 6 has two sets of threaded holes 11 symmetrically opened on both sides of the circular hole 7 in the middle. Each set of threaded holes 11 has a fixing bolt 12 installed inside the middle of the measuring hammer body 1. The bottom of both sets of fixing bolts 12 extends into the cavity 2. The fixing bolts 12 penetrate the middle of the measuring hammer body 1 and go deep into the cavity 2, further locking the connection between the fixing plate 6 and the measuring hammer body 1 from the inside. This ensures that the two are always tightly connected during the frequent lowering and raising of the measuring hammer, and there will be no relative displacement, thus ensuring the stability and accuracy of the measurement work.

[0029] It is worth noting that the bottom of the measuring hammer body 1 is provided with a deformation groove 13, and a buffer component 14 is installed in the middle of the deformation groove 13. The buffer component 14 inside the deformation groove 13 can effectively buffer the impact force generated when the measuring hammer contacts the borehole pile foundation. When the measuring hammer is lowered to the foundation and collides with the sediment or the bottom of the hole, the buffer component 14 is subjected to force first, thereby reducing the risk of damage to the measuring hammer caused by impact and extending the service life of the measuring hammer.

[0030] Specifically, the buffer assembly 14 includes a buffer plate 141 installed inside the deformation groove 13. A spring 142 is installed at the bottom of the buffer plate 141, and a buffer head 143 is installed at the bottom end of the spring 142. When the measuring hammer impacts the bored pile base, the buffer head 143 contacts the base first, initially dispersing the impact force. Then, the spring 142 exerts its elasticity, absorbing a large amount of energy through its own compression deformation, further weakening the impact force. Finally, the buffer plate 141 evenly transmits the remaining impact force to the deformation groove 13, avoiding local stress concentration and providing all-round protection for the measuring hammer body 1 from excessive impact, greatly reducing the possibility of damage to the measuring hammer and extending its service life. The stable buffering mechanism ensures that the measuring hammer is effectively protected every time it contacts the base, and can always maintain a good working condition even under frequent use.

[0031] More specifically, a rubber pad 144 is installed at the bottom of the buffer head 143, extending to the lower part of the measuring hammer body 1. The rubber pad 144 installed at the bottom of the buffer head 143 is soft and elastic. When the measuring hammer contacts the drilled pile base, the rubber pad 144 deforms first, acting as an additional buffer layer. Working in conjunction with the spring 142, it further absorbs and disperses the impact force, thus better protecting the measuring hammer. The extension of the bottom of the buffer head 143 to the lower part of the measuring hammer body 1 allows the rubber pad 144 to directly and quickly contact the base without worrying about interference from other structures below the measuring hammer body 1.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A measuring hammer for measuring the thickness of sediment at the base of a bored pile, comprising a conical measuring hammer body (1), characterized in that: The measuring hammer body (1) has a cavity (2) inside, a counterweight (3) is installed inside the cavity (2), and a partition (4) is installed on the upper part of the counterweight (3). A fixing plate (6) is installed on the top of the measuring hammer body (1). A circular hole (7) is opened in the middle of the fixing plate (6) at the upper part of the cavity (2). A connecting ring (8) is installed on the upper part of the partition plate (4) corresponding to the circular hole (7). A rope (9) is installed on the upper part of the connecting ring (8). The middle part of the rope (9) is installed through the middle of the circular hole (7).

2. The measuring hammer for measuring the thickness of sediment at the base of a bored pile according to claim 1, characterized in that: The top of the measuring hammer body (1) is provided with a mounting groove (5), and the fixing plate (6) is installed inside the mounting groove (5).

3. A measuring hammer for measuring the thickness of sediment at the base of a bored pile according to claim 2, characterized in that: The outer arc surface of the measuring hammer body (1) is provided with several sets of grooves (10) at equal intervals, and the openings of the several sets of grooves (10) are all downward.

4. A measuring hammer for measuring the thickness of sediment at the base of a bored pile according to claim 3, characterized in that: The fixing plate (6) has two sets of threaded holes (11) symmetrically opened on both sides of the circular hole (7) in the middle. Each set of threaded holes (11) has a fixing bolt (12) installed through the middle of the measuring hammer body (1). The bottom of both sets of fixing bolts (12) extends into the cavity (2).

5. A measuring hammer for measuring the thickness of sediment at the base of a bored pile according to claim 4, characterized in that: The bottom of the measuring hammer body (1) is provided with a deformation groove (13), and a buffer assembly (14) is installed in the middle of the deformation groove (13).

6. A measuring hammer for measuring the thickness of sediment at the base of a bored pile according to claim 5, characterized in that: The buffer assembly (14) includes a buffer plate (141) installed inside the deformation groove (13), a spring (142) is installed at the bottom of the buffer plate (141), and a buffer head (143) is installed at the bottom end of the spring (142).

7. A measuring hammer for measuring the thickness of sediment at the base of a bored pile according to claim 6, characterized in that: A rubber pad (144) is installed at the bottom of the buffer head (143), and the bottom end of the buffer head (143) extends to the lower part of the measuring hammer body (1).

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