CN214150153U

CN214150153U - Horizontal non-uniform foundation support pavement structure deflection testing device

Info

Publication number: CN214150153U
Application number: CN202120044236.0U
Authority: CN
Inventors: 黄信; 孙林; 陈然; 李正凯; 杨清尧; 汪旭
Original assignee: Civil Aviation University of China
Current assignee: Civil Aviation University of China
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-09-07
Anticipated expiration: 2031-01-08

Abstract

A deflection testing device for a horizontal non-uniform foundation support pavement structure. The test box comprises a box body and a test bracket; the upper end of the box body is open; the test support comprises a lower upright rod, an upper upright rod, a cross beam, a slideway and a fixing device; the utility model provides a complex operation during the inhomogeneous ground loading test of level, and the inhomogeneous stable problem of measured data. The test bracket is connected with the box body through the slide way, and the test bracket can slide on the slide way, so that the problems of complexity, uneven measurement positions and the like of the traditional measurement method are solved; the device which has the fixing function between the box body and the test support ensures the stability of the instrument during measurement, so that the measurement result is more accurate; the test support is provided with a plurality of equidistant limiting holes, and when a plurality of dial indicators are simultaneously installed for measurement, the influence of other variables on the experiment can be controlled while a plurality of data can be obtained within a certain time.

Description

Horizontal non-uniform foundation support pavement structure deflection testing device

Technical Field

The utility model belongs to the technical field of airport pavement structure atress performance experiment among the road engineering, especially, relate to a horizontal inhomogeneous ground supports pavement structure deflection testing arrangement.

Background

When the filling construction is carried out on the airport pavement, due to different soil body characteristics, the horizontal uneven distribution exists, so that the uneven settlement of the pavement structure is caused, and the pavement structure is damaged, therefore, the experimental research needs to be carried out on the stress influence of the horizontal uneven filling foundation on the airport pavement. The existing deflection test for the non-uniform foundation support pavement structure has the following problems:

1. although the deflection of the pavement structure can be tested by measuring the displacement change through the dial indicator, then the dial indicator cannot accurately position and fix the initial measuring point because the dial indicator bracket is not arranged above the pavement structure.

2. Because the deflection of pavement structure is plane distribution, and the amesdial only can fix in a position, can not remove, leads to the experiment to test the increase of point to it is big more to arrange the degree of difficulty to the test instrument of experiment, consequently can not satisfy the measurement requirement of experiment well.

Disclosure of Invention

In order to solve the problem, the utility model aims to provide a horizontal inhomogeneous ground supports pavement structure deflection testing arrangement.

In order to achieve the aim, the utility model provides a horizontal non-uniform foundation support pavement structure deflection testing device, which comprises a box body and a testing bracket; wherein, the upper end of the box body is open, a layer of non-uniform foundation material is laid on the inner bottom surface, and a pavement slab is placed on the non-uniform foundation material; the test support comprises a lower upright rod, an upper upright rod, a cross beam, a slideway and a fixing device; the slideways are of inverted U-shaped structures, openings on the two slideways are respectively clamped at the upper parts of two opposite side surfaces on the box body and are clamped by the fixing device; the lower vertical rods are hollow rods, the lower ends of the two lower vertical rods are respectively fixed on the top surfaces of the two slideways, and a pair of fixing holes are symmetrically formed on the circumferential surface of the upper part; the lower parts of the two upper vertical rods are respectively inserted into the lower vertical rod, a plurality of pairs of symmetrical connecting holes are formed in the circumferential surface of the lower part of each upper vertical rod at intervals along the vertical direction, and the lower vertical rod and the upper vertical rod are fixed in position in a mode that a fixing bolt penetrates through a fixing hole in the lower vertical rod and a pair of connecting holes in the upper vertical rod; the two ends of the cross beam are respectively fixed at the upper ends of the two upper vertical rods, and a plurality of limiting holes which are communicated up and down are formed in the middle of the cross beam at intervals and used for installing a dial indicator.

The height of the box body is larger than the sum of the thicknesses of the non-uniform foundation material and the road surface plate.

The fixing device is two bolts, the middle parts of two side surfaces of the slide way are respectively provided with a through hole, one end of each bolt penetrates through the through hole in the slide way and then abuts against the side surface of the box body, and therefore the slide way is firmly fixed on the box body.

The utility model provides a horizontal inhomogeneous ground supports pavement structure deflection testing arrangement complex operation when having solved horizontal inhomogeneous ground loading test, and the inhomogeneous stable problem of measured data. The test bracket is connected with the box body through the slide way, and the test bracket can slide on the slide way, so that the problems of complexity, uneven measurement positions and the like of the traditional measurement method are solved; the device which has the fixing function between the box body and the test support ensures the stability of the instrument during measurement, so that the measurement result is more accurate; the test support is provided with a plurality of equidistant limiting holes, and when a plurality of dial indicators are simultaneously installed for measurement, the influence of other variables on the experiment can be controlled while a plurality of data can be obtained within a certain time. In addition, the limiting holes horizontally aligned on the upper vertical rod of the test support ensure that all dial indicators are in the same horizontal position during measurement, and unnecessary errors in the test process are eliminated. The device realizes assembly, has simple structure, convenient experimental construction and high economic benefit.

Drawings

FIG. 1 is a sectional view of the horizontal non-uniform foundation support pavement structure deflection test device provided by the present invention;

FIG. 2 is a perspective view of the horizontal non-uniform foundation support pavement structure deflection test device provided by the present invention;

Detailed Description

The following describes the deflection test device for the horizontal uneven foundation support pavement structure provided by the present invention in detail with reference to the following embodiments and accompanying drawings.

As shown in fig. 1-2, the present invention provides a horizontal uneven foundation support pavement structure deflection testing device, which comprises a box body 1 and a testing support 2; wherein, the upper end of the box body 1 is open, a layer of non-uniform foundation material 3 is laid on the inner bottom surface, and a pavement slab 4 is placed on the non-uniform foundation material 3; the test support 2 comprises a lower upright 21, an upper upright 22, a cross beam 23, a slideway 24 and a fixing device 25; the slideways 24 are of inverted U-shaped structures, openings on the two slideways 24 are respectively clamped on the upper parts of two opposite side surfaces on the box body 1 and are clamped by the fixing device 25; the lower upright posts 21 are hollow posts, the lower ends of the two lower upright posts 21 are respectively fixed on the top surfaces of the two slide ways 24, and a pair of fixing holes are symmetrically formed on the circumferential surface of the upper part; the lower parts of the two upper vertical rods 22 are respectively inserted into the inner part of one lower vertical rod 21, a plurality of pairs of symmetrical connecting holes are arranged on the circumferential surface of the lower part of each upper vertical rod 22 at intervals along the vertical direction, and the positions of the lower vertical rod 21 and the upper vertical rod 22 are fixed by a mode that a fixing bolt penetrates through a fixing hole on the lower vertical rod 21 and a pair of connecting holes on the upper vertical rod 22; the two ends of the cross beam 23 are respectively fixed at the upper ends of the two upper vertical rods 22, and a plurality of vertically through limiting holes 26 are formed in the middle of the cross beam at intervals and used for installing a dial indicator 27.

The height of the box body 1 is larger than the sum of the thicknesses of the non-uniform foundation material 3 and the pavement slab 4.

The fixing device 25 is two bolts, the middle parts of two side surfaces of the slide way 24 are respectively provided with a through hole, one end of each bolt passes through the through hole on the slide way 24 and then abuts against the side surface of the box body 1, and therefore the slide way 24 is firmly fixed on the box body 1.

Will now the utility model provides a horizontal inhomogeneous ground supports pavement structure deflection testing arrangement's application method explains as follows:

during assembly, a tester firstly lays a layer of non-uniform foundation material 3 on the inner bottom surface of the box body 1, and then places a pavement slab 4 on the non-uniform foundation material 3; then clamping the openings on the two slide ways 24 on the upper parts of two opposite side surfaces of the box body 1 respectively, and clamping and fixing the openings by using a fixing device 25 after adjusting the positions; then, the lower portions of the two upper vertical rods 22 are inserted into the respective lower vertical rods 21, appropriate connection holes are selected, and the lower vertical rods 21 and the upper vertical rods 22 are fixed in position by fastening bolts inserted through a pair of connection holes in the lower vertical rods 21 and a pair of connection holes in the upper vertical rods 22. The measurement can be started, and the tester can insert the upper parts of a plurality of dial indicators 27 into the plurality of limiting holes 26 on the cross beam 23 respectively, make the lower ends of the dial indicators 27 contact the surface of the pavement slab 4, and if the dial indicators are not suitable, adjust the relative position between the upper vertical rod 22 and the lower vertical rod 21 until the dial indicators are suitable. The deflection values at different positions laterally of the pavement slab 4 can now be tested by means of the dial indicator 27. After one test, the fixing device 25 is loosened, the slide rail 24 is slid to another place along the box body 1, the fixing device 25 is tightened again, and the test is performed again.

In building foundation engineering, especially when horizontal ground is inhomogeneous, adopt the utility model discloses a horizontal inhomogeneous ground supports pavement structure deflection testing arrangement can carry out the loading test to horizontal inhomogeneous ground support pavement structure comparatively conveniently, avoids horizontal inhomogeneous ground to cause the influence to the guidance tape board to improve the pavement structural design on inhomogeneous ground effectively. Additionally, the utility model discloses a loading and testing arrangement preparation convenience of horizontal inhomogeneous ground support pavement structure, equipment is used simply, has better result of use.

Claims

1. The utility model provides a horizontal inhomogeneous ground supports pavement structure deflection testing arrangement which characterized in that: the horizontal non-uniform foundation support pavement structure deflection testing device comprises a box body (1) and a testing support (2); wherein the upper end of the box body (1) is open, a layer of non-uniform foundation material (3) is laid on the inner bottom surface, and a pavement slab (4) is placed on the non-uniform foundation material (3); the test support (2) comprises a lower upright (21), an upper upright (22), a cross beam (23), a slideway (24) and a fixing device (25); the slideways (24) are of an inverted U-shaped structure, openings on the two slideways (24) are respectively clamped at the upper parts of two opposite side surfaces on the box body (1) and are clamped by a fixing device (25); the lower upright posts (21) are hollow rods, the lower ends of the two lower upright posts (21) are respectively fixed on the top surfaces of the two slideways (24), and a pair of fixing holes are symmetrically formed on the circumferential surface of the upper part; the lower parts of the two upper vertical rods (22) are respectively inserted into the interior of one lower vertical rod (21), a plurality of pairs of symmetrical connecting holes are formed in the circumferential surface of the lower part of each upper vertical rod (22) at intervals along the vertical direction, and the lower vertical rod (21) and the upper vertical rod (22) are fixed in position in a mode that a fixing bolt penetrates through a fixing hole in the lower vertical rod (21) and a pair of connecting holes in the upper vertical rod (22); the two ends of the cross beam (23) are respectively fixed at the upper ends of the two upper vertical rods (22), and a plurality of limiting holes (26) which are communicated up and down are formed in the middle at intervals and used for installing a dial indicator (27).

2. The horizontal non-uniform foundation support pavement structure deflection testing device of claim 1, wherein: the height of the box body (1) is larger than the sum of the thicknesses of the non-uniform foundation material (3) and the pavement slab (4).

3. The horizontal non-uniform foundation support pavement structure deflection testing device of claim 1, wherein: the fixing device (25) is two bolts, the middle parts of two side surfaces of the slide way (24) are respectively provided with a through hole, one end of each bolt penetrates through the through hole in the slide way (24) and then abuts against the side surface of the box body (1), and therefore the slide way (24) is firmly fixed on the box body (1).