阅读说明：本技术 高速公路道面抗冻融能力检测装置及方法 (Device and method for detecting freeze-thaw resistance of highway pavement ) 是由 孙大成 马卫东 高华 孟小宏 宋磊 柳宇 高赫 王东彦 张佰振 王瑞强 沈建伟 于 2021-08-09 设计创作，主要内容包括：本发明涉及道路技术领域,具体涉及高速公路道面抗冻融能力检测装置及方法。高速公路道面抗冻融能力检测装置包括支撑底座、安装轴、摆杆、砸击锤、触发机构、检测盘,安装轴固定且沿前后方向延伸；摆杆左右对称,且从上往下宽度依次递增,摆杆下端可转动地安装于安装轴,且摆杆与安装轴铰接位置的下方设置有使摆杆趋于竖直重锤；砸击锤有两个,对称设置于摆杆左右两侧,两个砸击锤的滑移轮在锤头的重力作用下分别承靠于摆杆的左右两侧面；两个砸击锤通过前后延伸的连接柱铰接,且连接柱在沿摆杆长度方向向下滑动时砸击锤作用于摆杆使摆杆趋于竖直；检测盘与道面接触,以在连接柱滑至底端使支撑底座受到撞击时检测道面变化情况。(The invention relates to the technical field of roads, in particular to a device and a method for detecting the freeze-thaw resistance of a highway pavement. The device for detecting the freeze-thaw resistance of the highway pavement comprises a supporting base, an installation shaft, a swing rod, a smashing hammer, a trigger mechanism and a detection plate, wherein the installation shaft is fixed and extends in the front-back direction; the swing rods are bilaterally symmetrical, the widths of the swing rods are sequentially increased from top to bottom, the lower ends of the swing rods are rotatably arranged on the mounting shaft, and a heavy hammer which enables the swing rods to tend to be vertical is arranged below the hinged position of the swing rods and the mounting shaft; the two smashing hammers are symmetrically arranged on the left side and the right side of the swing rod, and sliding wheels of the two smashing hammers respectively lean against the left side surface and the right side surface of the swing rod under the action of the gravity of the hammer heads; the two smashing hammers are hinged through connecting columns extending forwards and backwards, and the smashing hammers act on the oscillating bar when the connecting columns slide downwards along the length direction of the oscillating bar so that the oscillating bar tends to be vertical; the detection disc is in contact with the road surface to detect the change condition of the road surface when the connecting column slides to the bottom end to enable the supporting base to be impacted.)

1. The utility model provides an anti freeze thawing ability detection device of highway pavement which characterized in that: the device comprises a supporting base, an installation shaft, a swing rod, a hitting hammer, a trigger mechanism and a detection disc, wherein the installation shaft is fixedly installed on the supporting base and extends along the front-back direction; the swing rods are bilaterally symmetrical, the widths of the swing rods are sequentially increased from top to bottom, the lower ends of the swing rods are rotatably arranged on the mounting shaft, a heavy hammer is arranged below the hinged position of the swing rods and the mounting shaft, and the heavy hammer has a certain weight so that the swing rods tend to be vertical; the pounding hammer comprises a hammer head, a first supporting rod, a second supporting rod and a sliding wheel, wherein the hammer head is positioned at the upper end of the first supporting rod, the lower end of the first supporting rod is fixedly connected with the upper end of the second supporting rod, a hinge ring which is through from front to back is arranged at the connecting position, and the sliding wheel can be rotatably arranged at the lower end of the second supporting rod around a rotating shaft which extends from front to back; the two smashing hammers are symmetrically arranged on the left side and the right side of the swing rod, the hammer head and the sliding wheel of each smashing hammer are positioned on one side of the hinge ring, which is far away from the swing rod, and the included angle between one side of the first supporting rod and one side of the second supporting rod, which is far away from the swing rod, of each smashing hammer is an obtuse angle, so that the sliding wheels of the two smashing hammers respectively lean against the left side surface and the right side surface of the swing rod under the action of the gravity of the hammer heads; the hinged rings of the two smashing hammers are hinged through connecting columns extending forwards and backwards, and the connecting columns can be arranged on the swing rod in a sliding manner along the length direction of the swing rod; the trigger mechanism is configured to enable the connecting column to be positioned at the upper end of the swing rod in an initial state and enable the connecting column to fall relative to the swing rod when triggered; the detection plate is arranged at the bottom of the support base and is in contact with the road surface so as to detect the change condition of the road surface when the support base is impacted.

2. The device for detecting the freezing and thawing resistance of the pavement of the expressway of claim 1, wherein: the trigger mechanism comprises two hooks, a tension spring and an unlocking sleeve, the two hooks are symmetrically arranged on the front side and the rear side of the connecting column, each hook comprises a trigger part, a connecting part and a claw part, the trigger part is fixedly connected with the connecting part, and the connecting position is hinged to the upper end of the swing rod; the claw parts are positioned at the lower end of the connecting part, the claw parts of the two claw hooks are respectively hooked on the lower side surfaces of the front end and the rear end of the connecting column, and the claw parts are positioned on one side, far away from the swing rod, of the connecting position of the triggering part and the connecting part; the upper end of the swing rod is provided with a guide post extending along the length direction of the swing rod, the tension spring and the unlocking sleeve are both sleeved on the guide post and positioned above the hook claw, the upper end of the tension spring is fixed on the guide post, and the lower end of the tension spring is connected with the unlocking sleeve, so that the unlocking sleeve is suspended above the hook claw.

3. The device for detecting the freezing and thawing resistance of the pavement of the expressway of claim 2, wherein: the trigger mechanism further comprises a pressure spring, the upper end of the swing rod is provided with a mounting hole communicated with the sliding groove, the pressure spring is mounted in the mounting hole and tightly pushes the connecting column in an initial state, and the connecting column is enabled to move downwards when the claw parts of the two hooks are opened outwards.

4. The device for detecting the freezing and thawing resistance of the pavement of the expressway of claim 1, wherein: the swing rod is provided with a sliding chute extending along the length direction of the swing rod, and the connecting column is slidably arranged in the sliding chute; the trigger mechanism is configured to position the connecting post at the upper end of the chute in an initial state and to drop the connecting post along the chute upon triggering.

5. The device for detecting the freezing and thawing resistance of the pavement of the expressway of claim 2, wherein: the left end and the right end of the connecting column are respectively provided with a clamping table extending forwards and backwards, and the claw parts of the two hooks are respectively hooked on the lower side surfaces of the two clamping tables.

6. A method for detecting the freeze-thaw resistance of a highway pavement is characterized by comprising the following steps: the device for detecting the freezing and thawing resistance of the highway pavement according to any one of claims 1 to 5, comprising: placing the supporting base on the pavement, triggering the trigger mechanism to enable the smashing hammer to fall down, and detecting and recording pavement deformation information by the detection disc; and repeatedly lifting the smashing hammer to the upper end of the swing rod to enable the smashing hammer to fall down again, and recording the information of the pavement after each impact by the detection disc.

Technical Field

The invention relates to the technical field of roads, in particular to a device and a method for detecting the freeze-thaw resistance of a highway pavement.

Background

The anti-freezing and thawing capacity refers to the capacity of keeping the original property of the pavement after multiple freezing and thawing cycles or not reducing the original property, the highway is paved by adopting concrete mostly, in order to ensure the strength of the pavement, the anti-freezing and thawing capacity of the pavement needs to be detected, the existing detection device detects the strength of the pavement by adopting a mode of impacting the pavement after the pavement undergoes multiple freezing and thawing cycles, and the direction of impacting the pavement cannot be ensured, and the pavement is always vertically impacted by vehicles in the actual use process, so the pavement strength detected by the existing detection device is always deviated from the actual condition, and the detection device capable of vertically impacting the pavement to detect the strength is needed to improve the accuracy of detection data.

Disclosure of Invention

The invention provides a device and a method for detecting the freeze-thaw resistance of a highway pavement, which aim to solve the problem that the existing detection device cannot ensure the direction of impacting the pavement.

The invention discloses a device and a method for detecting freeze-thaw resistance of a highway pavement, which adopt the following technical scheme:

a freeze-thaw resistance detection device for a highway pavement comprises a supporting base, an installation shaft, a swing rod, a smashing hammer, a trigger mechanism and a detection plate, wherein the installation shaft is fixedly installed on the supporting base and extends along the front-back direction; the swing rods are bilaterally symmetrical, the widths of the swing rods are sequentially increased from top to bottom, the lower ends of the swing rods are rotatably arranged on the mounting shaft, a heavy hammer is arranged below the hinged position of the swing rods and the mounting shaft, and the heavy hammer has a certain weight so that the swing rods tend to be vertical; the pounding hammer comprises a hammer head, a first supporting rod, a second supporting rod and a sliding wheel, wherein the hammer head is positioned at the upper end of the first supporting rod, the lower end of the first supporting rod is fixedly connected with the upper end of the second supporting rod, a hinge ring which is through from front to back is arranged at the connecting position, and the sliding wheel can be rotatably arranged at the lower end of the second supporting rod around a rotating shaft which extends from front to back; the two smashing hammers are symmetrically arranged on the left side and the right side of the swing rod, the hammer head and the sliding wheel of each smashing hammer are positioned on one side of the hinge ring, which is far away from the swing rod, and the included angle between one side of the first supporting rod and one side of the second supporting rod, which is far away from the swing rod, of each smashing hammer is an obtuse angle, so that the sliding wheels of the two smashing hammers respectively lean against the left side surface and the right side surface of the swing rod under the action of the gravity of the hammer heads; the hinged rings of the two smashing hammers are hinged through connecting columns extending forwards and backwards, and the connecting columns can be arranged on the swing rod in a sliding manner along the length direction of the swing rod; the trigger mechanism is configured to enable the connecting column to be positioned at the upper end of the swing rod in an initial state and enable the connecting column to fall relative to the swing rod when triggered; the detection plate is arranged at the bottom of the support base and is in contact with the road surface so as to detect the change condition of the road surface when the support base is impacted.

Optionally, the triggering mechanism comprises two hooks, a tension spring and an unlocking sleeve, the two hooks are symmetrically arranged on the front side and the rear side of the connecting column, each hook comprises a triggering part, a connecting part and a claw part, the triggering part is fixedly connected with the connecting part, and the connecting position is hinged to the upper end of the swing rod; the claw parts are positioned at the lower end of the connecting part, the claw parts of the two claw hooks are respectively hooked on the lower side surfaces of the front end and the rear end of the connecting column, and the claw parts are positioned on one side, far away from the swing rod, of the connecting position of the triggering part and the connecting part; the upper end of the swing rod is provided with a guide post extending along the length direction of the swing rod, the tension spring and the unlocking sleeve are both sleeved on the guide post and positioned above the hook claw, the upper end of the tension spring is fixed on the guide post, and the lower end of the tension spring is connected with the unlocking sleeve, so that the unlocking sleeve is suspended above the hook claw.

Optionally, the trigger mechanism further includes a pressure spring, a mounting hole communicated with the chute is formed in the upper end of the swing rod, the pressure spring is mounted in the mounting hole and tightly pushes the connecting column in an initial state, and the connecting column is made to move downwards when the claw portions of the two hooks are opened outwards.

Optionally, a sliding groove extending along the length direction of the swing rod is formed in the swing rod, and the connecting column is slidably mounted in the sliding groove; the trigger mechanism is configured to position the connecting post at the upper end of the chute in an initial state and to drop the connecting post along the chute upon triggering.

Optionally, the front end and the rear end of the connecting column are provided with clamping tables extending from front to rear, and the claw parts of the two hooks are respectively hooked on the lower side surfaces of the two clamping tables.

A method for detecting the freeze-thaw resistance of a highway pavement utilizes the freeze-thaw resistance detection device of the highway pavement, and comprises the following steps: placing the supporting base on the pavement, triggering the trigger mechanism to enable the smashing hammer to fall down, and detecting and recording pavement deformation information by the detection disc; and repeatedly lifting the smashing hammer to the upper end of the swing rod to enable the smashing hammer to fall down again, and recording the information of the pavement after each impact by the detection disc.

The invention has the beneficial effects that: the device for detecting the freeze-thaw resistance of the highway pavement enables the smashing hammer to impact the pavement in the direction which can be vertical as much as possible, accords with the impact condition of an actual vehicle on the pavement during running, and further enables the detection data to be more accurate.

Furthermore, when the pounding hammer begins to fall down, the swinging rod is pushed to swing to be vertical to the maximum force, so that the swinging rod quickly tends to be vertical, the pounding hammer impacts the bottom of the sliding groove along the closest vertical state and then impacts the road surface through the supporting base, the deviation of the force caused by the inclination of the swinging rod is reduced, and the accuracy of data is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of an embodiment of the device for detecting the freezing and thawing resistance of the pavement of the highway according to the invention;

FIG. 2 is a left side sectional view of the overall structure of an embodiment of the device for detecting the freezing and thawing resistance of the pavement of the expressway of the present invention;

FIG. 3 is an enlarged view of the point A in FIG. 2;

FIG. 4 is a schematic diagram of an initial state of a pounding hammer in an embodiment of the device for detecting the freezing and thawing resistance of the pavement of the expressway of the present invention;

FIG. 5 is a schematic view of the falling state of a pounding hammer in an embodiment of the device for detecting the freezing and thawing resistance of the pavement of the expressway of the present invention;

FIG. 6 is a schematic view of a state in which a pounding hammer falls to the bottom end of a chute in an embodiment of the device for detecting freezing and thawing resistance of a pavement of an expressway of the present invention;

FIG. 7 is a schematic structural view of a pounding hammer in an embodiment of the device for detecting freezing and thawing resistance of a pavement of an expressway of the present invention;

in the figure: 11. a tension spring; 12. unlocking the sleeve; 13. smashing a hammer; 131. a hammer head; 132. a first support bar; 133. a slipping wheel; 134. A hinge ring; 135. a second support bar; 14. a swing rod; 141. a chute; 142. a weight; 15. installing a shaft; 16. a support base; 17. detecting a disc; 18. an installation table; 21. a hook claw; 22. connecting columns; 221. clamping a platform; 23. and (5) pressing a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the device and the method for detecting the freeze-thaw resistance of the highway pavement of the invention, as shown in fig. 1 to 7, comprises a supporting base 16, a mounting shaft 15, a swing rod 14, a pounding hammer 13, a triggering mechanism and a detection plate 17,

the mounting shaft 15 is fixedly mounted on the support base 16 and extends in the front-rear direction;

the swing rod 14 is symmetrical left and right, the widths of the swing rod 14 are sequentially increased from top to bottom, the lower end of the swing rod 14 is rotatably mounted on the mounting shaft 15, a heavy hammer 142 is arranged below the hinged position of the swing rod 14 and the mounting shaft 15, and the heavy hammer 142 has a certain weight so that the swing rod 14 tends to be vertical;

the pounding hammer 13 comprises a hammer head 131, a first supporting rod 132, a second supporting rod 135 and a sliding wheel 133, wherein the hammer head 131 is positioned at the upper end of the first supporting rod 132, the lower end of the first supporting rod 132 is fixedly connected with the upper end of the second supporting rod 135, a hinge ring 134 which is through from front to back is arranged at the connecting position, and the sliding wheel 133 can be rotatably installed at the lower end of the second supporting rod 135 around a rotating shaft which extends from front to back; the two smashing hammers 13 are symmetrically arranged on the left side and the right side of the swing rod 14, the hammer heads 131 and the sliding wheels 133 of the left smashing hammer 13 are both positioned on the left side of the hinge ring 134, the included angle between the first supporting rod 132 and the second supporting rod 135 of the left smashing hammer 13 far away from one side of the swing rod 14 is an obtuse angle, the hammer heads 131 and the sliding wheels 133 of the right smashing hammer 13 are positioned on the right side of the hinge ring 134, the included angle between the first supporting rod 132 and the second supporting rod 135 of the right smashing hammer 13 far away from one side of the swing rod 14 is an obtuse angle, so that the sliding wheels 133 of the left smashing hammer 13 are supported against the left side surface of the swing rod 14 under the action of the gravity of the hammer heads 131, and the sliding wheels 133 of the right smashing hammer 13 are supported against the right side surface of the swing rod 14 under the action of the gravity of the hammer heads 131; the hinge rings 134 of the two pounding hammers 13 are hinged through connecting columns 22 extending back and forth, and the connecting columns 22 can be slidably mounted on the swing rod 14 along the length direction of the swing rod 14;

the trigger mechanism is configured to enable the connecting column 22 to be positioned at the upper end of the swing rod 14 in an initial state, and enable the connecting column 22 to fall relative to the swing rod 14 when triggered;

the detection plate 17 is installed at the bottom of the support base 16 and contacts the road surface to detect the change of the road surface when the support base 16 is impacted.

In this embodiment, the triggering mechanism includes two hooks 21, a tension spring 11 and an unlocking sleeve 12, the two hooks 21 are symmetrically disposed on the front and rear sides of the connecting column 22, each hook 21 includes a triggering portion, a connecting portion and a claw portion, the triggering portion and the connecting portion are fixedly connected, and the connecting position is hinged to the upper end of the swing rod 14; the claw parts are positioned at the lower end of the connecting part, the claw parts of the two claw hooks 21 are respectively hooked on the lower side surfaces of the front end and the rear end of the connecting column 22, and the claw parts are positioned on one side, far away from the swing rod 14, of the connecting position of the triggering part and the connecting part; the upper end of the swing rod 14 is provided with a guide post extending along the length direction of the swing rod 14, the upper end of the guide post is provided with a mounting table 18, the tension spring 11 and the unlocking sleeve 12 are both sleeved on the guide post and positioned above the claw 21, the upper end of the tension spring 11 is fixed on the mounting table 18, the lower end of the tension spring is connected with the unlocking sleeve 12, and the unlocking sleeve 12 is suspended above the claw 21; the unlocking sleeve 12 is pulled to move downwards to press the triggering parts of the two hooks 21, so that the claw parts of the two hooks 21 are opened outwards, and the connecting column 22 can be triggered to slide downwards along the sliding groove 141.

In this embodiment, the triggering mechanism further includes a compression spring 23, the upper end of the swing link 14 is provided with a mounting hole communicated with the sliding groove 141, the compression spring 23 is mounted in the mounting hole, and in an initial state, the compression spring tightly pushes the connecting column 22, and urges the connecting column 22 to move downward when the claw portions of the two hooks 21 are opened outward.

In this embodiment, the swing link 14 is provided with a sliding slot 141 extending along the length direction of the swing link 14, and the connecting column 22 is slidably mounted on the sliding slot 141; the trigger mechanism is configured to locate the connecting post 22 at the upper end of the slide groove 141 in an initial state and to drop the connecting post 22 along the slide groove 141 when triggered.

In this embodiment, the connecting column 22 is provided with two clamping bases 221 extending forward and backward at both front and rear ends, and the claw portions of the two hooks 21 are respectively hooked on the lower sides of the two clamping bases 221.

When in use, the supporting base 16 is placed on the road surface to be measured, the swing rod 14 tends to be vertical under the action of the gravity of the heavy hammer 142, but because friction exists between the lower end of the swing link 14 and the mounting shaft 15, the swing link 14 is finally in a state of swinging a certain angle leftwards or rightwards relative to the vertical line, for example, the swing link 14 is in a state of swinging to the right, at this time, the hammer head 131 of the left hammering hammer 13 is higher than the hammer head 131 of the right hammering hammer 13, the unlocking sleeve 12 is pulled downwards, so that the two hooks 21 are opened outwards to release the connecting column 22, the connecting column 22 moves downwards along the sliding groove 141 under the action of the gravity of the hammering hammer 13 and the elastic force of the compression spring 23, the component force of the gravity direction of the two hammer heads 131 acts on the connecting column 22 along the first supporting rod 132, and because the component force of the gravity of the left hammer 131 is larger, the connecting column 22 presses the right side surface of the chute 141 rightwards, but under the action of the elastic force of the pressure spring 23, the pressure of the connecting column 22 on the sliding chute 141 can be ignored; because the width of the swing link 14 is gradually increased from top to bottom, when the sliding wheels 133 of the two hammering hammers 13 move downwards along the left side and the right side of the swing link 14, the hammers 131 of the two hammering hammers 13 swing inwards, because the hammer 131 of the right hammering hammer 13 is lower than the hammer 131 of the left hammering hammer 13, and the right hammering hammer 13 needs a larger driving force when swinging inwards, the pressure of the sliding wheel 133 of the right hammering hammer 13 on the swing link 14 is larger than the pressure of the sliding wheel 133 of the left hammering hammer 13 on the swing link 14, and the swing link 14 swings towards the left and tends to be vertical when the hammering hammers 13 slide downwards; when the smashing hammer 13 just begins to fall, the distance between the lower end of the swing rod 14 and the hinged position of the mounting shaft 15 is the largest, the elastic force of the pressure spring 23 is the largest, the height difference between the two hammer heads 131 is the largest, so that the pressure of the sliding wheel 133 of the right smashing hammer 13 on the swing rod 14 is the largest when the smashing hammer 13 just begins to fall, the moment of swinging of the swing rod 14 around the mounting shaft 15 is the largest, the swing rod 14 is pushed to swing leftwards rapidly, the swing rod 14 gradually tends to be vertical along with the falling of the smashing hammer 13, the distance between the hinged position of the lower end of the swing rod 14 and the mounting shaft 15 and the sliding wheel 133 of the right smashing hammer 13 is gradually reduced, the elastic force of the pressure spring 23 is gradually reduced, the height difference between the two hammer heads 131 is reduced, the pressure of the sliding wheel 133 of the right smashing hammer 13 on the swing rod 14 is gradually reduced, and the moment of swinging of the swing rod 14 around the mounting shaft 15 is further gradually reduced, thereby make pound and hit pendulum rod 14 and be in the most near vertical state when hammering hammer 13 and move down to spout 141 bottom, pound hammer 13 and strike spout 141 bottom through spliced pole 22, and then transmit impact to the pavement through installation axle 15 and support base 16, detect the change of pavement deformation condition of plate 17 detection.

The embodiment of the detection method of the device for detecting the freeze-thaw resistance of the highway pavement comprises the following steps:

placing the supporting base 16 on the pavement, triggering the trigger mechanism to enable the smashing hammer 13 to fall down, and detecting and recording pavement deformation information by the detection disc 17; and repeatedly lifting the smashing hammer 13 to the upper end of the swing rod 14 to enable the smashing hammer 13 to fall down again, and recording the information of the back track surface after each impact by the detection disc 17.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.