Combined hammer for detecting low strain of foundation pile

Abstract

The utility model discloses a combination hammer used for foundation pile low strain detection, which comprises a hammer rod, at least two hammer bodies and a hammer head, the weight of each hammer body is different, the hammer head is made of nylon materials, and the hammer rod and the hammer head are directly and detachably connected. Or one or more hammer bodies are detachably connected between the hammer rod and the hammer head. The device is simple in structure, convenient to manufacture, capable of being used for detecting different piles, and high in applicability.

Description

Technical Field

[0001] The utility model relates to the technical field of pile foundation detection, in particular to a combination hammer for low-strain detection of pile foundations. Background Art

[0002] Low-strain testing requires vibrating hammers of varying weights depending on the pile diameter, length, and type. Existing vibrating hammers for low-strain testing on pile foundations are usually hand hammers or force bars provided by the manufacturer. These hammers have a fixed weight and cannot be adjusted. Furthermore, the rigid hammer head generates a high level of noise in the vibration signal, affecting signal acquisition quality. For on-site testing, it is sometimes necessary to carry several vibrating hammers of varying weights, which is inconvenient to carry and prone to loss. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a combination hammer for low-strain detection of foundation piles which has a simple structure, is easy to manufacture, can be used to meet the detection needs of different piles, and has high applicability.

[0004] The utility model is realized through the following technical solutions: a combination hammer for low-strain detection of foundation piles, comprising a hammer rod, a hammer body, and a hammer head, wherein at least two hammer bodies are provided, each of which has a different weight, and the hammer head is made of nylon material, and the hammer rod and the hammer head are directly detachably connected, or one or more hammer bodies are detachably connected between the hammer rod and the hammer head.

[0005] Furthermore: the hammer body is divided into hammer body I and hammer body II, and the hammer rod, hammer body I and hammer body II are respectively made of steel material in one piece.

[0006] Furthermore, the lower end of the hammer rod, the lower end of the hammer body I, and the lower end of the hammer body II are respectively provided with threaded columns, and the upper end of the hammer body I, the lower end of the hammer body I, and the upper end of the hammer head are respectively provided with threaded holes.

[0007] Furthermore: the hammer rod and the hammer head are connected through the threaded column and the threaded hole.

[0008] Furthermore, the hammer rod, hammer body I and hammer head are sequentially connected through the threaded column and the threaded hole and are coaxially arranged.

[0009] Furthermore, the hammer rod, hammer body II and hammer head are sequentially connected through the threaded column and the threaded hole and are coaxially arranged.

[0010] Furthermore, the hammer rod, hammer body I, hammer body II, and hammer head are sequentially connected through the threaded column and the threaded hole and are coaxially arranged.

[0011] Furthermore: it also includes a counterweight block, the upper end of the counterweight block is provided with the threaded hole, the lower end of the counterweight block is provided with the threaded column, and the counterweight block is connected between the hammer rod and the hammer head, or between the hammer rod and the hammer body I, or between the hammer rod and the hammer body II.

[0012] Furthermore: a pressure sensor is provided on the hammer head.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The hammer rod, hammer body and hammer head are detachably connected through threaded columns and threaded holes, which has a simple structure and is easy to manufacture. The nylon hammer head can be replaced as needed. When in use, the hammer rod, hammer body and hammer head can be freely combined and connected so that the hammer weight can be adjusted according to the detection needs. It can meet the different detection needs of various pile types and is easy to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model;

[0016] Figure 2 This is a schematic structural diagram of the second embodiment of the present utility model;

[0017] Figure 3 This is a schematic structural diagram of the third embodiment of the present invention;

[0018] Figure 4 This is a schematic structural diagram of the fourth embodiment of the present utility model;

[0019] Figure 5 and Figure 6 This is a schematic structural diagram of a fifth embodiment of the present invention;

[0020] Figure 7 This is a schematic diagram of the structural decomposition of Example 5 of the present utility model.

[0021] Explanation of the reference numerals: 1-hammer rod, 2-hammer head, 3-hammer body I, 4-hammer body II, 5-threaded column, 6-threaded hole, 7-counterweight block, 8-pressure sensor. DETAILED DESCRIPTION

[0022] Example 1: Reference Figure 1 , including a hammer rod 1, a hammer body, and a hammer head 2. There are at least two hammer bodies, each with a different weight. The hammer head 2 is made of nylon material. The hammer rod 1 and the hammer head 2 are directly detachably connected, or there is one or more hammer bodies detachably connected between the hammer rod 1 and the hammer head 2.

[0023] The hammer body is divided into a hammer body I3 and a hammer body II4, and the hammer rod 1, the hammer body I3 and the hammer body II4 are respectively made of steel material in one piece.

[0024] The lower end of the hammer rod 1, the lower end of the hammer body I3, and the lower end of the hammer body II4 are respectively provided with threaded columns 5, and the upper end of the hammer body I3, the lower end of the hammer body I3, and the upper end of the hammer head 2 are respectively provided with threaded holes 6.

[0025] In this embodiment, the hammer rod 1 and the hammer head 2 are connected via a threaded column 5 and a threaded hole 6 .

[0026] This embodiment can be used for low-strain detection of pipe piles.

[0027] A pressure sensor 8 is provided on the hammer head 2 .

[0028] The pressure sensor 8 is connected to a data acquisition device (not shown) via a signal line (not shown). The pressure sensor 8 converts the reaction pressure signal caused by the hammer strike into an electrical signal and transmits it to the data acquisition device.

[0029] Example 2: Reference Figure 2 The difference between this embodiment and embodiment 1 is that the hammer rod 1, hammer body I3 and hammer head 2 are connected in sequence through the threaded column 5 and the threaded hole 6 and are coaxially arranged.

[0030] This embodiment can be used for low-strain detection of longer pipe piles or small cast-in-place piles.

[0031] Example 3, refer to Figure 3 The difference between this embodiment and the first embodiment is that the hammer rod 1, the hammer body II 4 and the hammer head 2 are sequentially connected through the threaded column 5 and the threaded hole 6 and are coaxially arranged.

[0032] This embodiment can be used for low-strain detection of relatively large cast-in-place piles.

[0033] Example 4: Reference Figure 4 The difference between this embodiment and embodiment 1 is that the hammer rod 1, hammer body I3, hammer body II4, and hammer head 2 are connected in sequence through a threaded column 5 and a threaded hole 6 and are coaxially arranged.

[0034] This embodiment can be used for low-strain detection of large-diameter and ultra-long perfusions.

[0035] Example 5: Reference Figures 5 to 7 The difference between this embodiment and the embodiment is that it further includes a counterweight block 7, the upper end of the counterweight block 7 is provided with a threaded hole 6, the lower end of the counterweight block 7 is provided with a threaded column 5, and the counterweight block 7 is connected between the hammer rod 1 and the hammer head 2 (as shown in FIG. Figure 5 As shown), or connected between the hammer rod 1 and the hammer body Ⅰ3 (as shown Figure 6 and Figure 7 As shown), or connected between the hammer rod 1 and the hammer body II4.

[0036] The hammer weight can be further adjusted by the counterweight 7.

[0037] The utility model can adopt different combination modes according to the actual detection effect on site, and select the combination hammer with the best detection effect for detection.

[0038] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention should be included in the patent scope of this case.

Claims

1. A combination hammer for low-strain detection of pile foundations, characterized in that: It includes a hammer rod, a hammer body, and a hammer head. There are at least two hammer bodies, each of which has a different weight. The hammer head is made of nylon material. The hammer rod and the hammer head are directly detachably connected, or one or more hammer bodies are detachably connected between the hammer rod and the hammer head.

2. According to claim 1, a combination hammer for low-strain detection of foundation piles is characterized by: The hammer body is divided into a hammer body I and a hammer body II, and the hammer rod, the hammer body I and the hammer body II are respectively made of steel material in one piece.

3. The combination hammer for low-strain detection of pile foundation according to claim 2, characterized in that: The lower end of the hammer rod, the lower end of the hammer body I and the lower end of the hammer body II are respectively provided with threaded columns, and the upper end of the hammer body I, the lower end of the hammer body I and the upper end of the hammer head are respectively provided with threaded holes.

4. The combination hammer for low-strain detection of pile foundation according to claim 3, characterized in that: The hammer rod and the hammer head are connected through the threaded column and the threaded hole.

5. The combination hammer for low-strain detection of pile foundation according to claim 3, characterized in that: The hammer rod, hammer body I and hammer head are connected in sequence through the threaded column and the threaded hole and are coaxially arranged.

6. The combination hammer for low-strain detection of pile foundation according to claim 3, characterized in that: The hammer rod, hammer body II and hammer head are connected in sequence through the threaded column and the threaded hole and are coaxially arranged.

7. The combination hammer for low-strain detection of pile foundation according to claim 3, characterized in that: The hammer rod, hammer body I, hammer body II and hammer head are connected in sequence through the threaded column and the threaded hole and are coaxially arranged.

8. The combination hammer for low-strain detection of pile foundation according to claim 3, characterized in that: It also includes a counterweight block, the upper end of which is provided with the threaded hole, the lower end of which is provided with the threaded column, and the counterweight block is connected between the hammer rod and the hammer head, or between the hammer rod and the hammer body I, or between the hammer rod and the hammer body II.

9. The combination hammer for low-strain detection of pile foundation according to claim 4, characterized in that: A pressure sensor is arranged on the hammer head.

Images