Adjustable excitation hammer based on foundation pile low strain detection

Abstract

The adjustable excitation hammer comprises a hammer head, a rod body and a hammer tail, the rod body comprises a connecting part, an outer pipe part and an inner pipe part, one end of the outer pipe part is fixedly connected with the connecting part, the inner pipe part is arranged in a pipe body in a sleeved mode, the inner pipe part and the outer pipe part form a containing pipe body, and the hammer tail is arranged in the containing pipe body. A connecting rod is arranged at the end, connected with the outer pipe part, of the connecting part, and a threaded connecting groove is formed in the other end of the connecting part. According to specific use requirements, the corresponding hammerheads can be taken out and installed on the connecting part, then the remaining hammerheads are stored in the storage pipe body, the test requirements of the hammerheads made of different materials can be met, the inner pipe part can slide in the outer pipe part in a telescopic mode, so that the overall length of the storage pipe body is adjusted, and the corresponding hammerheads in the storage pipe body are taken out; and the inner pipe part is fixed through the hammer tail, so that the overall length and weight of the excitation hammer are adjusted, and the excitation hammer is flexible and convenient to use and suitable for large-scale application and popularization.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of exciting hammer, especially a adjustable exciting hammer for low strain detection of foundation pile. BACKGROUND

[0002] The annual pile amount in China is huge. In recent years, there are many cases involving pile foundation engineering quality problems that directly affect the normal use and safety of building structures. Improving the quality of foundation pile detection work and the reliability of detection evaluation results is of great significance to ensure the quality and safety of the entire pile foundation engineering. As one of the commonly used detection methods, low strain reflection wave method has important degree without saying, and the correct selection of exciting equipment is an important link of the test. The most commonly used transient exciting equipment in engineering detection is force rod and hand hammer. Using force rods and hand hammers with different hardness and weight, the pulse width and pulse frequency obtained by exciting the pile head are different. Therefore, in order to obtain the waveform that can clearly reflect the impedance change of pile body and pile bottom reflection, different force rods and hand hammers should be used for foundation piles with different pile lengths and diameters.

[0003] The waveform collected on site must clearly reflect the impedance change of pile body and pile bottom reflection in low strain method detection of the integrity of foundation pile, otherwise it will cause errors in the analysis results of pile bottom and defect position, and even some defects are covered up and cannot be reflected in the waveform. In order to avoid the above problems, the collected waveform must be correctly selected, and the pulse with appropriate width and frequency must be obtained. There is no specific selection standard for exciting rod equipment in the current low strain method detection of the integrity of foundation pile. The detection units use the exciting equipment attached to the instrument or other self-made exciting equipment such as simple steel head, and the level is uneven. The exciting equipment is various. When the owned exciting equipment cannot obtain satisfactory waveform, it often causes deviation of the analysis results, seriously affects the accuracy of the report, and even directly affects the construction progress, causing huge economic loss. UTILITY MODEL CONTENTS

[0004] (I) Technical problem to be solved

[0005] In order to solve the above problems in the prior art, the utility model provides a adjustable exciting hammer for low strain detection of foundation pile.

[0006] (II) Technical scheme

[0007] In order to achieve the above purpose, the utility model adopts the main technical scheme including:

[0008] A adjustable exciting hammer for low strain detection of foundation pile, comprising a hammer head, a rod body and a hammer tail.

[0009] The rod body comprises a connecting part, an outer pipe part and an inner pipe part.

[0010] One end of the outer tube part is fixedly connected to the connecting part;

[0011] The inner tube part is sleeved in the outer tube part, and the inner tube part and the outer tube part form a storage tube body;

[0012] One end of the outer tube part is fixedly connected to the connecting part;

[0013] The hammer heads are provided in plurality, the tail portions of the hammer heads are provided with threaded connecting rods corresponding to the threaded connecting grooves, and first connecting holes corresponding to the connecting rods are provided through the hammer heads, one of the hammer heads is threadedly connected to the end portion of the connecting part, and the remaining hammer heads are stacked and stored in the storage tube body;

[0014] Second connecting holes corresponding to the connecting rods are provided through the hammer tail, the hammer tail is threadedly connected to the tail portion of the inner tube part, and the hammer tail is fixed to the connecting rod by a fixing member.

[0015] Preferably, protruding blocks are arranged on both sides of the outer wall of the inner tube part, and sliding rails corresponding to the protruding blocks are arranged on the inner wall of the outer tube part.

[0016] Preferably, an outer thread is arranged at one end of the hammer tail, and an inner thread corresponding to the outer thread is arranged on the inner wall of the opening at the end of the inner tube part away from the outer tube part.

[0017] Preferably, a compression spring is arranged at the end of the hammer tail provided with the outer thread, and the compression spring is coaxial with the hammer tail.

[0018] Preferably, a screw hole is arranged on the hammer tail, the screw hole is in communication with the second connecting hole, a locking screw is threadedly connected in the screw hole, and the hammer tail is fixed to the connecting rod by screwing the locking screw.

[0019] Preferably, six hammer heads are arranged, and the materials of the six hammer heads are steel, aluminum, nylon, hard plastic, polytetrafluoroethylene and hard rubber respectively.

[0020] Preferably, the first connecting holes of the hammer heads are coaxial with the threaded connecting rods.

[0021] Preferably, a counterweight is further arranged, a third connecting hole corresponding to the connecting rod is arranged on the counterweight, and the counterweight is arranged in the storage tube body.

[0022] (Three) beneficial effects

[0023] The utility model discloses the beneficial effect lies in:

[0024] The application can meet the test requirements of hammer heads of different materials according to the specific use requirements, the inner tube part can slide in and out of the outer tube part, so as to adjust the overall length of the storage tube body, and the corresponding hammer head in the storage tube body is taken out, and then the inner tube part is fixed through the hammer tail, so as to realize the adjustment of the overall length and weight of the excitation hammer, the application is flexible and convenient to use, and is suitable for large-scale popularization and use. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of an adjustable excitation hammer based on low strain detection of a foundation pile.

[0026] Figure 2 It is an internal structure schematic view of an adjustable excitation hammer based on low strain detection of a foundation pile. Figure One

[0027] Figure 3 It is an internal structure schematic view of an adjustable excitation hammer based on low strain detection of a foundation pile. Figure Two

[0028]

BRIEF DESCRIPTION OF DRAWINGS

[0029] 1, hammer head; 11, threaded connecting rod;

[0030] 2, rod body;

[0031] 21, connecting part; 22, outer tube part; 23, inner tube part; 24, connecting rod;

[0032] 3, hammer tail;

[0033] 31, external thread; 32, locking screw rod;

[0034] 4, compression spring. DETAILED DESCRIPTION

[0035] In order to better explain the utility model, so as to facilitate understanding, the utility model is described in detail in combination with the specific embodiments and the drawings.

[0036] Please refer to Figures 1 to 3 The utility model provides an adjustable excitation hammer based on low strain detection of a foundation pile, which comprises a hammer head 1, a rod body 2 and a hammer tail 3.

[0037] The rod body 2 comprises a connecting part 21, an outer tube part 22 and an inner tube part 23.

[0038] One end of the outer tube part 22 is fixedly connected with the connecting part 21.

[0039] The inner tube part 23 is sleeved in the outer tube part 22, and the inner tube part 23 and the outer tube part 22 form a storage tube body.​​

[0040] The connecting part 21 is provided with a connecting rod 24 at one end of the outer tube part 22, and is provided with a threaded connecting groove at the other end;

[0041] A plurality of hammer heads 1 are provided, the tail of the hammer head 1 is provided with a threaded connecting rod 11 corresponding to the threaded connecting groove, and a first connecting hole corresponding to the connecting rod 24 is provided through the hammer head 1, one of the hammer heads 1 is threaded at the end of the connecting part 21, and the remaining hammer heads 1 are stacked in the storage tube;

[0042] A second connecting hole corresponding to the connecting rod 24 is provided through the hammer tail 3, the hammer tail 3 is threaded at the tail of the inner tube part 23, and is fixed on the connecting rod 24 by a fixing part;

[0043] In use, except for the hammer head 1 installed on the connecting part 21, the remaining hammer heads 1 are installed in the storage tube, achieving portable carrying, and according to specific use requirements, the corresponding hammer head 1 can be taken out and installed on the connecting part 21, so as to meet different test requirements, the inner tube part 23 can slide in and out of the outer tube part 22, so as to adjust the overall length of the storage tube, and the corresponding hammer head 1 in the storage tube can be taken out, and the inner tube part 23 is fixed by the hammer tail 3, so as to adjust the overall length and weight of the excitation hammer, achieving flexible and convenient use, and being suitable for large-scale popularization and use.

[0044] In the embodiment, the outer wall of the inner tube part 23 is provided with protruding blocks on both sides, the inner wall of the outer tube part 22 is provided with sliding rails corresponding to the protruding blocks, and the inner tube part 23 moves in the sliding rails in the outer tube part 22 through the protruding blocks, so as to adjust the overall length of the storage tube.

[0045] In the embodiment, one end of the hammer tail 3 is provided with an external thread 31, the inner wall of the opening at the end of the inner tube part 23 away from the outer tube part 22 is provided with an internal thread corresponding to the external thread 31, and the detachable connection of the hammer tail 3 and the inner tube part 23 is achieved by the threaded connection.

[0046] In the embodiment, the end of the hammer tail 3 provided with the external thread 31 is provided with a compression spring 4, the compression spring 4 is coaxially arranged with the hammer tail 3, and the arrangement of the compression spring 4 makes the hammer heads 1 in the storage tube in a state of being tightly pressed with each other, avoiding the shaking of the hammer heads 1 in the storage tube in use.

[0047] In the embodiment, a threaded hole is formed in the hammer tail 3, the threaded hole is in communication with the second connecting hole, a locking screw 32 is threaded in the threaded hole, and the hammer tail 3 is fixed on the connecting rod 24 by rotating the locking screw 32.

[0048] In the embodiment, the hammer head 1 is provided with six, and the materials of the six hammer heads 1 are steel, aluminum, nylon, hard plastic, polytetrafluoroethylene and hard rubber respectively.

[0049] In the embodiment, the first connecting hole on the hammer head 1 is coaxially arranged with the threaded connecting rod 11.

[0050] In the embodiment, the counterweight is also included, the counterweight is provided with a third connecting hole corresponding to the connecting rod 24, the counterweight is installed in the storage pipe body, and the overall weight of the excitation hammer is accurately controlled by replacing the counterweight.

[0051] The working principle of the utility model is as follows:

[0052] In addition to the hammer head 1 installed on the connecting part 21, the remaining hammer heads 1 are installed in the storage pipe body, portable carrying is realized, corresponding hammer heads 1 can be taken out and installed on the connecting part 21 according to specific use requirements, different test requirements are met, the inner pipe part 23 can slide in and out in the outer pipe part 22, the overall length of the storage pipe body is adjusted, corresponding hammer heads 1 in the storage pipe body are taken out, the inner pipe part 23 is fixed through the hammer tail 3, the overall length and weight of the excitation hammer are adjusted, flexible and convenient use is realized, and large-scale popularization and use are suitable.

[0053] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in the related technical field is also included in the patent protection range of the utility model.

[0054] In addition, it should be understood that, although the present specification is described according to the embodiments, not every embodiment only contains an independent technical scheme, the description mode of the specification is only for the sake of clarity, and the person skilled in the art should regard the specification as a whole, and the technical scheme in each embodiment can also be combined to form other embodiments that can be understood by the person skilled in the art.

Claims

1. An adjustable vibration hammer for low-strain testing of foundation piles, characterized in that, Includes the hammer head, the rod body, and the hammer tail; The rod body includes a connecting part, an outer tube part, and an inner tube part; One end of the outer tube is fixedly connected to the connecting part; The inner tube is fitted inside the outer tube, and the inner tube and the outer tube together form a receiving tube body; A connecting rod is provided at one end of the connecting part that connects to the outer tube part, and a threaded connecting groove is provided at the other end of the connecting part; The hammerhead is provided in multiple ways. The tail of the hammerhead is provided with a threaded connecting rod corresponding to the threaded connecting groove. The hammerhead is provided with a first connecting hole corresponding to the connecting rod. One of the hammerheads is threaded to the end of the connecting part, and the remaining hammerheads are stacked and stored in the storage tube. The hammer tail is provided with a second connecting hole corresponding to the connecting rod. The hammer tail is threaded to the tail of the inner tube and fixed to the connecting rod by a fastener.

2. The adjustable vibration hammer for low-strain testing of foundation piles according to claim 1, characterized in that, The inner tube has protrusions on both sides of its outer wall, and the outer tube has a slide rail corresponding to the protrusions on its inner wall.

3. The adjustable vibration hammer for low-strain testing of foundation piles according to claim 1, characterized in that, One end of the hammer tail is provided with an external thread, and the inner wall of the opening at the end of the inner tube that is away from the outer tube is provided with an internal thread corresponding to the external thread.

4. The adjustable vibration hammer for low strain testing of foundation piles according to claim 3, characterized in that, A compression spring is installed on one end of the hammer tail with external threads, and the compression spring is coaxial with the hammer tail.

5. The adjustable vibration hammer for low strain testing of foundation piles according to claim 1, characterized in that, The hammer tail is provided with a screw hole, which is connected to the second connecting hole. A locking screw is threaded into the screw hole. Tightening the locking screw fixes the hammer tail to the connecting rod.

6. The adjustable vibration hammer for low strain testing of foundation piles according to claim 1, characterized in that, The hammerhead is provided with 6 parts, and the materials of the 6 hammerheads are steel, aluminum, nylon, hard plastic, polytetrafluoroethylene and hard rubber, respectively.

7. The adjustable vibration hammer for low strain testing of foundation piles according to claim 1, characterized in that, The first connecting hole on the hammer head is coaxially arranged with the threaded connecting rod.

8. The adjustable vibration hammer for low strain testing of foundation piles according to claim 1, characterized in that, It also includes a counterweight, which has a third connecting hole corresponding to the connecting rod, and the counterweight is installed inside the storage tube.

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