CN110132759B - Shearing test device for pre-buried channel on shield segment and detection method thereof - Google Patents
Shearing test device for pre-buried channel on shield segment and detection method thereof Download PDFInfo
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- CN110132759B CN110132759B CN201910454268.5A CN201910454268A CN110132759B CN 110132759 B CN110132759 B CN 110132759B CN 201910454268 A CN201910454268 A CN 201910454268A CN 110132759 B CN110132759 B CN 110132759B
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- 238000010008 shearing Methods 0.000 title claims abstract description 69
- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 238000012546 transfer Methods 0.000 description 6
- 230000001066 destructive effect Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- General Physics & Mathematics (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a shearing test device and a detection method for a pre-buried channel on a shield segment, wherein the device comprises the following components: the device comprises a first plate body, a second plate body, a third plate body and a shear force detection device, wherein a first mounting hole is formed in the first plate body, and the first plate body is perpendicular to an embedded channel; the second plate body is vertically arranged on the first plate body and extends along the first plate body, a first shearing preformed hole is formed in the second plate body, and the first shearing preformed hole is used for the shearing force detection device to penetrate so as to detect the longitudinal shearing force of the bolt to be detected; the third plate body is vertically arranged at one end of the second plate body, the third plate body is vertically arranged with the second plate body, a second shearing reserved hole is formed in the third plate body, and the second shearing reserved hole is used for the shearing force detection device to penetrate through to detect transverse shearing force of a bolt to be detected. The utility model can truly reflect the longitudinal and transverse shearing force of the embedded chute without frequent switching devices.
Description
Technical Field
The utility model relates to the technical field of building construction, in particular to a shearing test device for a pre-buried channel on a shield segment and a detection method thereof.
Background
The embedded channel and the T-shaped bolt fixed by the embedded channel can meet the requirements of various equipment to be installed on a subway section tunnel and vibration friction between a running train and a contact net, so that the T-shaped bolt fastened in the embedded channel is subjected to the action of longitudinal and transverse shearing loads, and the channel is free from obvious plastic deformation or failure damage, and the safety of later use of engineering is ensured. Therefore, how to accurately evaluate the T-shaped screw stress problem of the embedded channel becomes one of important indexes for evaluating the performance of the embedded channel.
The utility model patent (CN 208171764U) provides a device for a pre-buried channel shearing test, but the device pre-buried a chute sample in concrete in a laboratory, and only simulates the actual use condition of the pre-buried channel, and the shearing force measured by the device can not represent the shearing force actually applied to the pre-buried chute of the field shield segment.
The utility model patent (CN 207779832U) also provides a multifunctional embedded channel shearing force test tool, which only simulates the shearing force between the T-shaped bolt and the chute when the T-shaped bolt is fastened in the chute, and does not embed the chute in concrete.
In the prior art, two steel plates are arranged on two sides of the width of the pipe piece, and pass through the gaps of the steel plates through the dowel bars to be used as counter force, but the method is low in success rate and efficiency because the section of the jack is positioned at the edge of the pipe piece and the steel plates tilt to squeeze the edge of the pipe piece during loading, so that the concrete at the edge of the pipe piece is easily stressed to collapse.
Disclosure of Invention
In view of the above, the utility model provides a shear test device for a pre-buried channel on a shield segment and a detection method thereof, wherein a bolt to be detected is arranged in the pre-buried channel of the shield segment to better represent the actual shearing force of the pre-buried channel of the shield segment, and the shear test device for the pre-buried channel on the shield segment is convenient to install and detach without a frequent switching device by combining a longitudinal shearing force device with a transverse shearing force device, so that the defect that the conventional shear test device for the pre-buried channel on the shield segment cannot express the actual shearing force of the pre-buried channel of the shield segment when the bolt shearing force is detected and is easy to cause segment damage when the shearing force is detected is overcome.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a pre-buried spout shear test device, include:
the first plate body is provided with a first mounting hole for fixing the first plate body on the embedded channel, and the first plate body is perpendicular to the embedded channel;
the second plate body is vertically arranged on the first plate body and extends along the first plate body, a first shearing reserved hole is formed in the second plate body and is used for allowing the shearing force detection device to penetrate through so as to detect the longitudinal shearing force of a bolt to be detected, and the bolt to be detected is slidably arranged in the embedded channel;
the third plate body is vertically arranged at one end of the second plate body, the third plate body is vertically arranged with the second plate body, a second shearing preformed hole is formed in the third plate body, and the second shearing preformed hole is used for the shearing force detection device to penetrate to detect the transverse shearing force of the bolt to be detected;
the shear force detection device comprises a jack, a dowel bar and a digital display dial indicator, wherein the end part of the jack is propped against the second plate body or the third plate body, the dowel bar is in driving connection with the jack, the dowel bar penetrates through the first shearing reserved hole or the second shearing reserved hole and then is fastened with a bolt to be detected, the jack is driven, the jack applies longitudinal shear force or transverse shear force to the bolt to be detected through the dowel bar, and the digital display dial indicator is in contact connection with the dowel bar to display the deformation amount of the deformation of the embedded channel caused by the stressed bolt to be detected.
In the embodiment of the utility model, a hanging plate is arranged at the other end of the second plate body opposite to the third plate body, and a second mounting hole is formed in the hanging plate.
In the embodiment of the utility model, a first stiffening plate is arranged between the first plate body and the second plate body.
In the embodiment of the utility model, a bottom plate is arranged at the bottom of the third plate body, one side of the bottom plate is fixed with the first plate body, and a second stiffening plate is arranged between the bottom plate and the third plate body.
In the embodiment of the utility model, the length of the second plate body is longer than that of the first plate body, and one end of the second plate body extends to be connected with the bottom plate and the third plate body.
The utility model further provides a detection method of the shearing test device utilizing the pre-buried channel on the shield segment, which comprises the following steps:
s1: the first mounting hole is penetrated through by a bolt, and the embedded channel test device is mounted on the embedded channel;
s2: installing a bolt to be detected in the embedded channel, connecting the bolt to be detected with a shear force detection device, wherein the shear force detection device is provided with a shear dowel bar, the shear dowel bar penetrates through the first shear preformed hole or the second shear preformed hole, a dowel bar connector is installed at the end part of the dowel bar, and the dowel bar connector is connected with the bolt to be detected;
s3: the shear force detection device is activated to detect either a longitudinal shear force or a transverse shear force of the bolt to be detected.
The utility model adopts the technical proposal, which has the following beneficial effects:
(1) The pre-buried chute shear test device adopts the shield pre-buried chute segment which is cured in situ to expire, and can truly reflect the longitudinal and transverse shear force of the pre-buried chute.
(2) The test device has reasonable design, can integrate the longitudinal shearing force device and the transverse shearing force device into a whole, is convenient to install and detach, and does not need frequent switching devices; and meanwhile, the position of the shear test device can be reasonably adjusted by selecting the most unfavorable position of the bolt to be tested, and the bolt to be tested is fastened and fixed.
(3) According to the utility model, the fixed embedded chute shear test device is fully utilized by utilizing the lifting hole and the chute channel of the duct piece, so that the stability of the device when providing counter force is ensured; meanwhile, the base can be used as a T-shaped bolt drawing force detector, and the device is high in applicability.
Drawings
Fig. 1 is a schematic structural diagram of a pre-buried chute shear test device of the present utility model.
Fig. 2 is a schematic diagram of a use state of the pre-buried chute shear test device for transverse shear force detection.
Fig. 3 is a schematic view of a use state of the pre-buried chute shear test device for detecting longitudinal shear force.
The correspondence of the reference numerals with the components is as follows:
a first plate body 1; a first mounting hole 11; a hanging plate 12; a second mounting hole 121; a first stiffener 13; a bottom plate 14; a second stiffening plate 15; a second plate body 2; a first shear prepared hole 21; a third plate 3; a second shear prepared hole 31; pre-buried channel 4; a bolt 5 to be detected; a shear force detection device 6; shearing the dowel bar 61; dowel bar connector 62; a digital display type hand-pressure oil pump 63; a jack 64; jack oil pipe 65; shearing the dowel bolt 66; shear force transfer sleeve 67; a magnetometer mount 68; a base 69; a digital display dial indicator 60; the head 7 is grasped.
Detailed Description
In order to facilitate the understanding of the present utility model, the following description is provided with reference to the drawings and examples.
Referring to fig. 1 to 3, the utility model provides a pre-buried chute shear test device, which comprises a first plate body 1, a second plate body 2, a third plate body 3 and a shear force detection device, wherein a first mounting hole 11 for fixing the first plate body 1 on a pre-buried channel 4 is arranged on the first plate body 1, and the first plate body 1 is vertically arranged with the pre-buried channel 4; the second plate body 2 is vertically arranged on the first plate body 1 and extends along the first plate body 1, a first shearing preformed hole 21 is formed in the second plate body 2, the first shearing preformed hole 21 is used for a shearing force detection device to penetrate to detect the longitudinal shearing force of the bolt 5 to be detected, and the bolt 5 to be detected is slidably arranged in the embedded channel 4; the third plate body 3 is vertically arranged at one end of the second plate body 2, the third plate body 3 is vertically arranged with the second plate body 2, a second shearing reserved hole 31 is formed in the third plate body 3, and the second shearing reserved hole 31 is used for the shearing force detection device to penetrate through to detect the transverse shearing force of the bolt 5 to be detected; the shear force testing device comprises a jack 64, a dowel bar 61 and a digital display dial indicator 60, wherein the end part of the jack 64 abuts against the second plate body 2 or the third plate body 3, the dowel bar 61 is in driving connection with the jack 64, the dowel bar 61 penetrates through the first shear preformed hole 21 or the second shear preformed hole 31 and then is fastened with the bolt 5 to be detected, the jack 64 is driven, the jack 64 applies longitudinal shear force or transverse shear force to the bolt 5 to be detected through the dowel bar 61, and the digital display dial indicator 60 is in contact connection with the dowel bar 61 to display deformation amount of deformation of the pre-buried channel 4 caused by stress of the bolt 5 to be detected.
In order to further fix the shearing test device of the pre-buried channel on the shield segment, the other end of the second plate body 2 opposite to the third plate body 3 is provided with a lifting plate 12, the lifting plate 12 is provided with a second mounting hole 121, and the second mounting hole 121 is used for being connected and fixed with a grabbing and lifting head. The jack 64 can be provided with a stable counter force by fixing the shear test device; the second plate 2 and the third plate 3 may be abutted against the jack 64, and may also provide a reaction force for the jack 64.
Preferably, in order to improve the connection strength between the first plate body 1 and the second plate body 2, a first stiffening plate 13 is disposed between the first plate body 1 and the second plate body 2; in the embodiment of the present utility model, the first stiffening plate 13 is a right-angle triangular plate, and two right-angle sides of the right-angle triangular plate are respectively fixed with the first plate body 1 and the second plate body 2; the number of the first stiffening plates 13 is a plurality, and the first stiffening plates are arranged between the first plate body 1 and the second plate body 2 at intervals; preferably, the first stiffening plates 13 are respectively arranged at two ends and in the middle of the corresponding structure.
Preferably, in order to improve the connection strength between the second plate body 2 and the third plate body 3, a bottom plate 14 is arranged at the bottom of the third plate body 3, one side of the bottom plate 14 is fixed with the first plate body 1, and a second stiffening plate 15 is further arranged between the bottom plate 14 and the third plate body 3; in the embodiment of the present utility model, the second stiffening plate 15 is a right-angle triangular plate, and two right-angle sides of the right-angle triangular plate are respectively fixed with the third plate body 3 and the bottom plate 14; the number of the second stiffening plates 15 is a plurality, and the second stiffening plates are arranged between the third plate body 3 and the bottom plate 14 at intervals so as to improve the structural stability of the test device; preferably, the second stiffening plates 15 are respectively arranged at two ends and in the middle of the corresponding structure.
Preferably, in order to improve the structural stability of the test device of the present utility model, the length of the second plate 2 is greater than that of the first plate 1, one end of the second plate 2 extends to abut against the third plate 3, and one end of the second plate 2 is fixed to the third plate 3; in this embodiment of the present utility model, the second plate 2 is fixed in the middle of the third plate 3, and the second shear preformed holes 31 are respectively formed on two sides of the third plate 3 in the second plate 2.
The structure of the pre-buried channel shear test device of the present utility model is specifically described above, and a method for detecting a longitudinal shear force and a transverse shear force by using the pre-buried channel shear test device will be described below with reference to fig. 2 and 3.
S1: the shear test device of the embedded channel on the shield segment is arranged on the embedded channel 4 through the first mounting hole 11 in a penetrating way of a bolt, so that the embedded channel 4 is perpendicular to the first plate body 1;
in order to further improve the stability of the shearing test device of the embedded channel on the shield segment, the second mounting hole 121 is sleeved on the grabbing head so as to further fix the shearing test device;
s2: installing a bolt 5 to be detected in the embedded channel 4, connecting the bolt 5 to be detected with a shear force detection device 6, wherein the shear force detection device 6 is provided with a shear force transfer rod 61, the shear force transfer rod 61 passes through the first shear preformed hole 21 or the second shear preformed hole 31, a transfer rod connector 62 is installed at the end part of the shear force transfer rod 61, and the transfer rod connector 62 is connected with the bolt 5 to be detected to detect the longitudinal shear force or the transverse shear force of the bolt 5 to be detected;
in the embodiment of the utility model, in order to accurately measure the shearing force of the bolt 5 to be detected, the position of the bolt 5 to be detected is adjusted so that the bolt 5 to be detected is positioned at the position where the shearing force is least favorable, namely, between two chute bolts (not shown) on the embedded chute 4, one end of each chute bolt is fixed with the embedded chute 4, and the other end of each chute bolt is embedded in the duct piece concrete so as to increase the anchoring force of the embedded chute 4 in the duct piece concrete;
in the embodiment of the present utility model, the shear force detection device 6 further includes a digital display type hand oil pump 63, a jack oil pipe 65, a shear dowel bolt 66, a shear dowel sleeve 67, a shear dowel connector 62, a magnetometer stand 68, and a base 69, and the connection steps of the shear force detection device are as follows:
s21: after one end of the shear dowel bar 61 passes through the first shear preformed hole 21 or the second shear preformed hole 31, one end of the shear dowel bar 61 is connected with a shear dowel bar connector 62, and the bolt 5 to be detected, which is slidably arranged in the embedded channel 4, is fastened on the shear dowel bar connector 62, wherein the fastening force needs to reach the fastening force recommended by manufacturers;
then, the jack 64 is arranged on one side of the second plate body 2 or the third plate body 3, which is far away from the embedded channel 4, the jack 64 is sleeved outside the shearing dowel bar 61, two shearing dowel sleeves 67 are sleeved at two ends of the jack 64, one end of the jack 64 is propped against the second plate body 2 or the third plate body 3 to provide counter force, and the shearing dowel bar 61 is fixed with the jack 64 through a shearing dowel bar bolt 66;
s22: a jack oil pipe 65 and a digital display type hand-press oil pump 63 are installed, one end of the jack oil pipe 65 is connected with a jack 64, the other end of the jack oil pipe 65 is connected with the output end of the digital display type hand-press oil pump 63, the digital display type hand-press oil pump 63 drives the jack 64 to apply acting force to the shearing dowel bar 61 through the jack oil pipe 65, and the shearing dowel bar 61 generates shearing force to a bolt 5 to be detected, which is connected with the shearing dowel bar;
s23: the digital display dial indicator 60 is fixed at the top end of the shear dowel bar connector 62 through a magnetic meter seat 68, the magnetic meter seat 68 is fixed on a base 69 by means of magnetic force, the digital display dial indicator 60 is used for displaying deformation amount of deformation of an embedded channel opening caused by stress of a bolt to be detected, and the magnetic meter seat 68 is used for fixing the digital display dial indicator 60;
s24: adjusting the digital display dial indicator 60 to zero the data of the digital display dial indicator 60, opening the jack digital display indicator to zero the data of the jack digital display indicator;
the attachment step of the shear force sensing device may be in any other suitable order of installation and is not limited to the attachment step shown herein; the digital display type hand-pressure oil pump can be replaced by other suitable power mechanisms;
s3: activating the shear force detection device 6 to detect the longitudinal shear force or the transverse shear force of the bolt 5 to be detected, wherein the longitudinal shear force refers to the stress of the bolt 5 to be detected when the embedded channel 4 is parallel to the shear dowel 61; the transverse shearing force refers to the stress of the bolt 5 to be detected when the embedded channel 4 is perpendicular to the shearing dowel bar 61; in the embodiment of the present utility model, the shear force detection of the bolt 5 to be detected includes non-destructive shear force and destructive shear force detection; specifically:
non-destructive shear force: the oil valve is opened, the oil valve is loaded at a constant speed, the oil pump 63 is loaded to the designed load at a uniform speed within 2-3min, the load is stabilized for 2min, the load value is reduced by not more than 5% of the stable value, and the deformation is not more than 1mm through the actual measurement of the digital display dial indicator 60, namely the non-destructive shear force is qualified.
Breaking shear force: and loading the oil pump to the damage load by adopting a uniform rate in 2-3min or finishing the test when the deformation reaches 1mm by actually measuring the digital display dial indicator 60, wherein the peak value of the oil pressure gauge is not smaller than the load of the design value, namely the damage shear force is qualified.
The present utility model has been described in detail with reference to the drawings and embodiments, and one skilled in the art can make various modifications to the utility model based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the utility model, which is defined by the appended claims.
Claims (5)
1. The utility model provides a shear test device of pre-buried channel on shield constructs section of jurisdiction which characterized in that includes:
the first plate body is provided with a first mounting hole for fixing the first plate body on the embedded channel, and the first plate body is perpendicular to the embedded channel;
the second plate body is vertically arranged on the first plate body and extends along the first plate body, a first shearing reserved hole is formed in the second plate body and is used for allowing the shearing force detection device to penetrate through so as to detect the longitudinal shearing force of a bolt to be detected, and the bolt to be detected is slidably arranged in the embedded channel;
the third plate body is vertically arranged at one end of the second plate body, the third plate body is vertically arranged with the second plate body, a second shearing preformed hole is formed in the third plate body, and the second shearing preformed hole is used for the shearing force detection device to penetrate to detect the transverse shearing force of the bolt to be detected;
the shear force detection device comprises a jack, a dowel bar and a digital display dial indicator, wherein the end part of the jack is propped against the second plate body or the third plate body, the second plate body or the third plate body provides counter force for the jack, the dowel bar is in driving connection with the jack, the dowel bar penetrates through the first shear preformed hole or the second shear preformed hole and then is fastened with a bolt to be detected, the jack is driven, the jack applies longitudinal shear force or transverse shear force to the bolt to be detected through the dowel bar, and the digital display dial indicator is in contact connection with the dowel bar to display deformation amount of deformation of the embedded channel caused by the stress of the bolt to be detected;
the lifting jack is characterized in that a lifting plate is arranged at the other end of the second plate body, opposite to the third plate body, a second mounting hole is formed in the lifting plate and is used for being fixedly connected with the grabbing head to provide counter force for the lifting jack.
2. The shear test device for the pre-buried channel on the shield segment according to claim 1, wherein a first stiffening plate is arranged between the first plate body and the second plate body.
3. The shear test device for the pre-buried channel on the shield segment according to claim 1, wherein a bottom plate is arranged at the bottom of the third plate body, one side of the bottom plate is fixed with the first plate body, and a second stiffening plate is arranged between the bottom plate and the third plate body.
4. The shear test device for pre-buried channels on shield segments according to claim 3, wherein the length of the second plate body is greater than that of the first plate body, and one end of the second plate body extends to be connected with the bottom plate and the third plate body.
5. A detection method using the shear test device for pre-buried channels on shield segments according to any one of claims 1 to 4, comprising the steps of:
s1: the first mounting hole is penetrated through by a bolt, and the embedded channel test device is mounted on the embedded channel;
s2: installing a bolt to be detected in the embedded channel, connecting the bolt to be detected with a shear force detection device, wherein the shear force detection device is provided with a shear dowel bar, the shear dowel bar penetrates through the first shear preformed hole or the second shear preformed hole, a dowel bar connector is installed at the end part of the shear dowel bar, and the dowel bar connector is connected with the bolt to be detected;
s3: the shear force detection device is activated to detect either a longitudinal shear force or a transverse shear force of the bolt to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910454268.5A CN110132759B (en) | 2019-05-29 | 2019-05-29 | Shearing test device for pre-buried channel on shield segment and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910454268.5A CN110132759B (en) | 2019-05-29 | 2019-05-29 | Shearing test device for pre-buried channel on shield segment and detection method thereof |
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| CN110132759A CN110132759A (en) | 2019-08-16 |
| CN110132759B true CN110132759B (en) | 2024-02-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112710565B (en) * | 2020-12-16 | 2023-05-23 | 武汉材料保护研究所有限公司 | Channel on-site shear force experimental device and method for nondestructive concrete |
| CN113959616A (en) * | 2021-11-29 | 2022-01-21 | 华侨大学 | In-situ self-reaction force testing device and method for transverse shearing of embedded channel |
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