CN219284719U - Highway road surface engineering compactness test detection device - Google Patents

Abstract

The utility model discloses a highway pavement engineering compactness test detection device which comprises a ring cutter, a ring cover, a guide rod and a guide seat, wherein the bottom of the ring cover is provided with an annular clamping groove for clamping the ring cutter, the upper surface of the ring cover is provided with a counter bore, a detection rod is inserted into the counter bore in a vertically movable manner, the detection rod is of a T-shaped structure, and when the detection rod is completely immersed into the counter bore, the bottom of the detection rod is flush with the upper end surface of the annular clamping groove. This road surface engineering compactness test detection device can directly place the cutting ring on the road bed road surface and take a sample according to the step, need not to level the road bed road surface earlier and take a sample again, has simplified the operation step, can save time to improve work efficiency, and can make the uneven part expose the upside to the cutting ring when taking a sample, can avoid the inside sample of cutting ring to appear the condition of few, thereby guarantee follow-up measuring result's accuracy.

Description

Highway road surface engineering compactness test detection device

Technical Field

The utility model relates to the technical field of pavement detection, in particular to a road pavement engineering compactness test detection device.

Background

The determination of compaction mainly comprises indoor standard density (maximum dry density) determination and in-situ density test. The compactness of the roadbed reflects the compact strength of each compacted layer of the roadbed, and the whole strength, stability and durability of the roadbed can meet the requirements only by enabling the compact strength of each compacted layer to meet the regulations. The compactness detection method of the roadbed pavement comprises the following steps: core sampling, ring cutting, sand filling, water bag, nuclear densitometer, etc. Roadbed is usually manufactured by ring knife method, sand filling method, water bag method, nuclear densitometer method, etc.

The ring cutter method is mainly suitable for measuring the density of the fine-grained soil and the stable fine-grained soil of the inorganic binder. At present, the geotome that the experimental inspection device of cutting ring method adopted mainly includes: the device comprises a cutting ring, a ring cover, a directional cylinder, a guide rod, a drop hammer and a handle; the soil sampling experiment steps comprise: 1. cleaning the ground with the area of about 30cm multiplied by 30cm, and shoveling off the part with floating unevenness on the surface of the compacted layer; 2. fixing the orientation cylinder on the shoveled ground, and sequentially placing the cutting ring and the ring cover into the orientation cylinder to be vertical to the ground; 3. the guide rod is kept in a vertical state, and a drop hammer is used for driving the ring cutter into the compacting layer until the top surface of the ring cover is flush with the upper opening of the orientation cylinder; 4. removing the drop hammer and the orientation cylinder, digging out the ring cutter and the sample, scraping off the residual soil at the two ends of the ring cutter by using a soil-trimming cutter, and detecting by using a ruler until trimming; 5. and finally, weighing and detecting the material.

The problems in the sampling and detection by the conventional ring method are as follows: when the ground is uneven, the ring cutter cannot be directly placed, the ground is leveled firstly, then the ring cutter is placed and is put down for sampling, and the operation steps are complex; if the cutting ring is directly placed on uneven ground for downward pressure sampling, uneven sample at the upper end inside the cutting ring (the sample is recessed towards the inside of the cutting ring) can be caused, so that the sample in the cutting ring has less mass, the measured roadbed density is lower than the actual roadbed density, and the error of the measured result is large.

Disclosure of Invention

The utility model aims to overcome the existing defects, and provides the road surface engineering compactness test detection device which can directly place the ring cutter on the road surface of the roadbed for sampling according to steps, and the road surface of the roadbed is not required to be leveled first and then sampled, so that the operation steps are simplified, the time can be saved, the working efficiency is improved, the uneven part can be exposed to the upper side of the ring cutter during sampling, the condition that the number of samples in the ring cutter is small can be avoided, the accuracy of the subsequent measurement results is ensured, and the problems in the background art can be effectively solved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a road surface engineering compactness test detection device, includes ring cutter, the open ring lid, guide arm and the guide holder that set up in bottom, the annular draw-in groove that is used for the joint ring cutter has been seted up to the inside lower extreme of ring lid, the counter bore has been seted up to the upper surface of ring lid, the inside activity of counter bore is alternated from top to bottom has the measuring rod.

As a preferable technical scheme of the utility model, the diameter of the annular clamping groove is equal to the diameter of the outer circle of the cutting ring.

As a preferable technical scheme of the utility model, the inner diameter of the upper end of the inner part of the ring cover is larger than that of the ring cutter.

As a preferable embodiment of the present utility model, the lower end of the outer side of the ring cover is chamfered to be inclined in the axial direction.

As a preferable technical scheme of the utility model, the detection rod is of a T-shaped structure, and when the detection rod is completely immersed into the counter bore, the bottom of the detection rod is flush with the upper end face of the annular clamping groove.

As a preferable technical scheme of the utility model, the upper surface of the ring cover is provided with vent holes.

As a preferable technical scheme of the utility model, a detachable guide rod is arranged on the upper surface of the ring cover, and the guide rod is vertically movably inserted in the guide seat.

Compared with the prior art, the utility model has the beneficial effects that:

according to the road pavement engineering compactness test detection device, the ring cutter is placed on the ground to be sampled, and the annular clamping groove of the ring cover is clamped on the ring cutter, so that the detection rod corresponds to the road surface at the lower part in the ring cutter, and soil samples gradually enter the ring cutter and the ring cover in the vertical downward moving process of the ring cover and the ring cutter, so that the sampling operation is facilitated.

According to the road surface engineering compactness test detection device, the ring cutter can be directly placed on the road surface of the road bed to sample according to the steps, the road surface of the road bed is not required to be leveled first and then sampled, the operation steps are simplified, the time can be saved, the working efficiency is improved, the uneven part can be exposed to the upper side of the ring cutter during sampling, the condition that the number of samples in the ring cutter is small can be avoided, and the accuracy of the subsequent measurement results is guaranteed.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of a part of the structure of FIG. 1;

FIG. 3 is a schematic cross-sectional view of FIG. 2;

FIG. 4 is a schematic view of the bottom structure of the ring cover of the present utility model;

fig. 5 is a schematic structural view of the clamping connection between the ring cover and the ring cutter in the utility model.

In the figure: the device comprises a ring cutter 1, a ring cover 2, a ring clamping groove 21, a detection rod 22, a vent hole 23, a guide rod 3 and a guide seat 4.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present utility model provides a technical solution: the utility model provides a road surface engineering compactness test detection device, including ring cutter 1, the open ring lid 2 that sets up in bottom, guide arm 3 and guide holder 4, ring lid 2 inside lower extreme has been seted up and has been used for joint ring cutter 1's annular draw-in groove 21, the counter bore has been seted up to ring lid 2's upper surface, the inside activity of counter bore is interluded from top to bottom has measuring rod 22, place ring cutter 1 on waiting the sample ground, and with ring lid 2's annular draw-in groove 21 card on ring cutter 1, make measuring rod 22 correspond with the road surface of lower position in ring cutter 1, ring lid 2 and ring cutter 1 vertically move down in-process soil sample enter into ring cutter 1 and ring lid 2 gradually.

And in the process of continuously moving down the cutting ring 1 and the ring cover 2, soil moves out to the upper side of the cutting ring 1 to be in contact with the guide rod 3, and when the guide rod 3 is in contact with the ground and is jacked up by the ground, the height of the concave part is higher than the top height of the cutting ring 1.

Preferably, the diameter of the annular clamping groove 21 is equal to the outer circle diameter of the cutting ring 1, and the annular clamping groove 21 is clamped with the cutting ring 1.

Preferably, the inner diameter of the upper end inside the ring cover 2 is larger than that of the ring cutter 1, so that soil samples exposed on the upper side of the ring cutter 1 are prevented from being clamped into the ring cover 2, and the ring cover 2 is conveniently separated from the ring cutter 1.

Preferably, the lower end of the outer side of the ring cover 2 is subjected to chamfering treatment inclined towards the axial direction, so that when the ring cutter 1 and the ring cover 2 are inserted into soil, the ring cover 2 can squeeze the soil around the periphery of the ring cutter 1, and the ring cutter 1 can be conveniently excavated subsequently.

Preferably, the detecting rod 22 is of a T-shaped structure, and when the detecting rod 22 is completely immersed into the counter bore, the bottom of the detecting rod 22 is flush with the upper end surface of the annular clamping groove 21, so that the detecting rod 22 is prevented from falling into the cutting ring 1 through the counter bore.

Preferably, the upper surface of the ring cover 2 is provided with a vent hole 23, and after the ring cutter 1 is inserted into the soil, the air between the ring cutter 1 and the ring cover 2 can be discharged through the vent hole 23.

Preferably, a detachable guide rod 3 is mounted on the upper surface of the ring cover 2, the guide rod 3 is vertically movably inserted in the guide seat 4, a hammer is used for striking the guide rod 3, and the guide rod 3 drives the ring cutter 1 to move downwards through the ring cover 2, so that the ring cutter 1 is inserted into the ground for sampling.

The middle part of the upper surface of the ring cover 2 is provided with a sleeve, the lower end of the peripheral side surface of the guide rod 3 and the inner wall of the sleeve are provided with threads, and the guide rod 3 is in threaded connection with the sleeve, so that the guide rod 3 is convenient to detach.

The guide seat 4 is provided with a limiting ring which is arranged corresponding to the round hole in the middle of the upper surface of the guide seat, and the guide rod 3 is limited through the limiting ring and the round hole, so that the guide rod 3 keeps moving up and down.

When in use:

1. placing the cutting ring 1 on the ground of a place to be sampled;

2. the annular clamping groove 21 at the lower end of the ring cover 2 is clamped with the ring cutter 1, so that the guide rod 3 is aligned to a concave part on the ground, the guide seat 4 is contacted with the ground, and the guide seat 4 is stepped on by feet, thereby temporarily fixing the guide seat 4;

3. the hammer is used for striking the guide rod 3, and the guide rod 3 drives the cutting ring 1 to move downwards through the ring cover 2, so that the cutting ring 1 is inserted into the ground for sampling;

31. the cutting ring 1 and the ring cover 2 are sequentially inserted into the ground in the hammer striking process, and when the cutting ring 1 is completely immersed into the ground, the part of the ring cover 2 corresponding to the annular clamping groove 21 is inserted into the ground, and at the moment, the guide rod 3 is about to be contacted with the ground with a concave part;

32. in the process of continuously moving down the cutting ring 1 and the ring cover 2, the guide rod 3 is contacted with the ground and jacked up by the ground, which indicates that the height of the concave part is higher than the top of the cutting ring 1 at the moment;

4. digging and weighing a soil sample according to a geotechnical test method standard GB/T50123;

5. soil volume weight was calculated as follows.

d=g·100/[V·(100+W)]

Wherein: d-soil volume weight (g/cm 3)

g-wet soil weight in cutting ring (g)

V-cutting ring volume (cm 3)

W-moisture content (%) of sample.

According to the utility model, the ring cutter 1 can be directly placed on the roadbed pavement for sampling according to steps, the roadbed pavement is not required to be leveled first and then sampled, the operation steps are simplified, the time can be saved, the working efficiency is improved, the uneven part can be exposed to the upper side of the ring cutter 1 during sampling, the condition that the number of samples in the ring cutter 1 is small can be avoided, and the accuracy of the subsequent measurement results is ensured.

The non-disclosed parts of the utility model are all prior art, and the specific structure, materials and working principle thereof are not described in detail. Although embodiments of the present utility model 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 therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a road surface engineering compactness test detection device, includes ring cutter (1), the uncovered ring lid (2), guide arm (3) and guide holder (4) that set up in bottom, its characterized in that: the annular clamping groove (21) for clamping the annular cutter (1) is formed in the lower end of the inside of the annular cover (2), a counter bore is formed in the upper surface of the annular cover (2), and a detection rod (22) is inserted into the counter bore in an up-down moving mode.

2. The highway pavement engineering compactness test detection device of claim 1, characterized in that: the diameter of the annular clamping groove (21) is equal to the diameter of the outer circle of the cutting ring (1).

3. The highway pavement engineering compactness test detection device of claim 1, characterized in that: the inner diameter of the upper end of the inner part of the ring cover (2) is larger than that of the ring cutter (1).

4. The highway pavement engineering compactness test detection device of claim 1, characterized in that: the lower end of the outer side of the ring cover (2) is subjected to chamfering treatment inclined to the axial direction.

5. The highway pavement engineering compactness test detection device of claim 1, characterized in that: the detection rod (22) is of a T-shaped structure, and when the detection rod (22) is completely immersed into the counter bore, the bottom of the detection rod (22) is flush with the upper end face of the annular clamping groove (21).

6. The highway pavement engineering compactness test detection device of claim 1, characterized in that: the upper surface of the ring cover (2) is provided with a vent hole (23).

7. The highway pavement engineering compactness test detection device of claim 1, characterized in that: the upper surface of the ring cover (2) is provided with a detachable guide rod (3), and the guide rod (3) is vertically movably inserted in the guide seat (4).

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