Pavement base structure compactness measuring device

Abstract

The utility model discloses a pavement base structure compactness measuring device which comprises a container, a plurality of strip-shaped piezoelectric sensors are arranged on the side face of the inner wall of the container, a round piezoelectric sensor is arranged on the bottom face in the container, and the container is made of iron wires and is a cylinder without a top face. By arranging the strip-shaped piezoelectric sensor on the side surface, more accurate gravel quality data can be obtained by calculating the lateral surrounding rock pressure and the gravel quality, and interference caused by the lateral surrounding rock pressure is avoided. The device can be pre-buried in a road, can obtain the piezoelectric response characteristics of the large-particle-size macadam base layer closest to the actual working condition in a short time, calculates the compaction degree of the pavement base layer on the basis of the piezoelectric response characteristics, and can accurately represent the compaction degree characteristics of the large-particle-size macadam base layer under different conditions. And the compaction degree change process of the large-particle-size macadam base can be observed through an on-site pavement test, so that more accurate data can be provided for various aspects of road construction.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring devices, and in particular relates to a device for measuring the compaction degree of a road base structure. Background Art

[0002] In road engineering, the compaction of large-size crushed stone base is directly related to the long-term performance and disease formation of the pavement structure. However, there is currently a lack of complete testing equipment for the compaction study of such roadbed materials.

[0003] The patent publication number is CN117127575A, and the name is a patent application for a compaction measurement method and a non-destructive compaction measurement device for a road surface. The non-destructive compaction measurement device for a road surface includes a center hammer and a ring hammer. The bottom of the center hammer has a center impact part for contacting and impacting with the road surface. The bottom of the ring hammer has a peripheral impact part for contacting and impacting with the road surface. The peripheral impact part is an annular structure located outside the center impact part. The non-destructive compaction measurement device for a road surface also includes an impact drive mechanism for driving the center impact part and the peripheral impact part to impact the road surface at the same time. Although this patent application can also test the compaction of a road, it is not suitable for compaction measurement of large-diameter gravel roads. Utility Model Content

[0004] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the utility model is to provide a pavement base structure compaction measuring device. By pre-burying the device in the road base, the mass of crushed stone can be read by a sensor and the container volume of the device is known, so the compaction characteristics of the large-size crushed stone base under different conditions can be accurately characterized.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A device for measuring the compaction degree of a road base structure comprises a container, a plurality of strip-shaped piezoelectric sensors are arranged on the inner wall side of the container, a circular piezoelectric sensor is arranged on the inner bottom surface of the container, the container is made of iron wire, and the container is a cylinder without a top surface.

[0007] Optionally, the number of the strip piezoelectric sensors is four, and they are arranged equidistantly in the annular direction.

[0008] Optionally, the four strip-shaped piezoelectric sensors are arranged at the same plane height.

[0009] Optionally, the container is a cylinder without a top surface.

[0010] Optionally, the diameter of the circular piezoelectric sensor is smaller than the bottom diameter of the container.

[0011] Optionally, the outer side of the strip-shaped piezoelectric sensor is a curved surface and matches the inner wall of the container.

[0012] Optionally, the pavement base structure compaction measuring device also includes a Bluetooth sensor module.

[0013] Optionally, the container is buried in the base layer of the road.

[0014] Optionally, the circular piezoelectric sensor and the strip piezoelectric sensor are both charge-type piezoelectric sensors.

[0015] Optionally, the container includes a mesh bottom surface, a plurality of vertical members are arranged on the top of the outer edge of the mesh bottom surface, the plurality of vertical members have the same height, a top frame is arranged on the top of the vertical members, and the tops of the plurality of vertical members are all connected to the bottom of the top frame; a plurality of ring members are wound around the plurality of vertical members in an annular direction, and the plurality of ring members are arranged along the axial direction of the vertical members.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model can be pre-buried in the road, and can obtain the piezoelectric response characteristics of the large-size crushed stone base closest to the actual working conditions in a short time, and calculate the compaction degree of the road base based on this, and can accurately characterize the compaction degree characteristics of the large-size crushed stone base under different conditions, and can observe the compaction degree change process of the large-size crushed stone base through field road tests, providing more accurate data for many aspects of road construction. The measurement device based on piezoelectric technology can realize real-time monitoring and data collection, ensuring the acquisition of comprehensive and reliable information.

[0018] The utility model has a simple structure, reasonable composition, and easy operation, and can realize the rapid measurement and calculation of the compaction degree of large-size crushed stone road base with different thicknesses and different gradations. The utility model can calculate the lateral surrounding rock pressure and the crushed stone quality by setting a strip piezoelectric sensor on the side, so as to obtain more accurate crushed stone quality data and avoid the interference caused by the lateral pressure of the surrounding rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 It is a top view of the utility model;

[0022] Figure 3 It is a side view of the utility model;

[0023] Figure 4 This is a schematic diagram of the strip piezoelectric sensor of the utility model;

[0024] Figure 5 This is a schematic diagram of the circular piezoelectric sensor of the utility model;

[0025] Among them, 1. container; 2. strip piezoelectric sensor; 3. circular piezoelectric sensor. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] The utility model is described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1 As shown, a pavement base structure compaction measurement device of the utility model comprises a container 1, a strip piezoelectric sensor 2, a circular piezoelectric sensor 3 and a Bluetooth sensor module. A pavement base structure compaction measurement device of the utility model is buried in the base of a road.

[0031] A plurality of strip-shaped piezoelectric sensors 2 are arranged on the inner wall side of the container 1 , and a circular piezoelectric sensor 3 is arranged on the inner bottom surface of the container 1 .

[0032] The container 1 is made of iron wire, so that the side wall of the container 1 has toughness, can be bent and shaped at will, is not easy to break or rust, and can adapt to various irregular test pits. Specifically, the container 1 is made of No. 10 iron wire or No. 3 iron wire.

[0033] The container 1 is a cylinder without a top surface. The container 1 can be filled with road base material.

[0034] The diameter of the circular piezoelectric sensor 3 is smaller than the bottom diameter of the container 1. Specifically, the container 1 is a cylinder without a top surface, and the container 1 includes a mesh bottom surface, and a plurality of vertical members are arranged at the top of the outer edge of the mesh bottom surface, and the heights of the plurality of vertical members are the same, and a top frame is arranged at the top of the vertical members, and the tops of the plurality of vertical members are connected to the bottom of the top frame; a plurality of ring members are wound around the plurality of vertical members in the circumferential direction, and the plurality of ring members are arranged along the axial direction of the vertical members.

[0035] Specifically, there are four strip-shaped piezoelectric sensors 2 , which are arranged at the same plane height and equidistantly in the circumferential direction. The outer side of the strip-shaped piezoelectric sensor 2 is a curved surface and matches the inner wall of the container 1 .

[0036] Optionally, the circular piezoelectric sensor 3 and the strip piezoelectric sensor 2 are both charge-type piezoelectric sensors.

[0037] Under the gravity of the base material, the bottom circular piezoelectric sensor 3 can generate an electrical signal, and under the lateral confining pressure of the base material, the strip piezoelectric sensor 2 can generate an electrical signal. The electrical signals generated by the circular piezoelectric sensor 3 and the strip piezoelectric sensor 2 are both sent to the Bluetooth sensor module, which inputs the signals into the computer and finally calculates the compaction degree of the road surface through analysis.

[0038] The degree of compaction refers to the ratio of the dry density of soil or other road construction materials after compaction to the standard maximum dry density. Based on this definition, the mass of large-size crushed stone in container 3 can be calculated, and the volume of container 3 is known, so the dry density after compaction can be calculated. The standard maximum dry density is also known. The ratio of the two is the degree of compaction.

[0039] The device can solve the problems of inconvenient and inaccurate compaction measurement in large-grained base layers and irregular excavated measuring pits, and is helpful to utilize the on-site environment to quickly and accurately measure the compaction measurement required for large-grained gravel base layers.

[0040] Unless otherwise specified, the device elements involved in the above embodiments are all conventional device elements, and the structural settings, working modes or control modes involved are all conventional settings, working modes or control modes in the art unless otherwise specified.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A device for measuring the compaction of a road base structure, characterized in that: The invention comprises a container (1), wherein a plurality of strip-shaped piezoelectric sensors (2) are arranged on the inner wall side of the container (1), and a circular piezoelectric sensor (3) is arranged on the inner bottom surface of the container (1). The container (1) is made of iron wire and is a cylinder without a top surface.

2. A pavement base structure compaction measurement device according to claim 1, characterized in that: The number of the strip-shaped piezoelectric sensors (2) is four, and they are arranged equidistantly in the annular direction.

3. A pavement base structure compaction measurement device according to claim 2, characterized in that: The four strip-shaped piezoelectric sensors (2) are arranged at the same plane height.

4. A pavement base structure compaction measurement device according to claim 1, characterized in that: The container (1) is a cylinder without a top surface.

5. A pavement base structure compaction measurement device according to claim 4, characterized in that: The diameter of the circular piezoelectric sensor (3) is smaller than the bottom diameter of the container (1).

6. A pavement base structure compaction measurement device according to claim 4, characterized in that: The outer side of the strip-shaped piezoelectric sensor (2) is a curved surface and matches the inner wall of the container (1).

7. A pavement base structure compaction measurement device according to claim 1, characterized in that: The pavement base structure compaction degree measuring device also includes a Bluetooth sensor module.

8. A pavement base structure compaction measurement device according to claim 1, characterized in that: The container (1) is buried in the base layer of the road.

9. A pavement base structure compaction measurement device according to claim 1, characterized in that: The circular piezoelectric sensor (3) and the strip-shaped piezoelectric sensor (2) are both charge-type piezoelectric sensors.

10. A pavement base structure compaction measurement device according to claim 1, characterized in that: The container (1) comprises a mesh bottom surface, a plurality of vertical members are arranged at the top of the outer edge of the mesh bottom surface, the plurality of vertical members have the same height, a top frame is arranged at the top of the vertical members, and the tops of the plurality of vertical members are all connected to the bottom of the top frame; a plurality of ring members are wound around the plurality of vertical members in an annular direction, and the plurality of ring members are arranged along the axial direction of the vertical members.

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