CN211453191U - Shield segment joint direct shear test device - Google Patents
Shield segment joint direct shear test device Download PDFInfo
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- CN211453191U CN211453191U CN201922079602.1U CN201922079602U CN211453191U CN 211453191 U CN211453191 U CN 211453191U CN 201922079602 U CN201922079602 U CN 201922079602U CN 211453191 U CN211453191 U CN 211453191U
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Abstract
The utility model relates to a shield constructs section of jurisdiction joint direct shear test device, including the frame, be equipped with section of jurisdiction axial spacing unit, the vertical spacing unit of section of jurisdiction and shear force loading unit in the frame, the relative position relation between the vertical spacing unit of section of jurisdiction and the shear force loading unit satisfies: after the test segment is axially limited by the segment axial limiting unit, the segment vertical limiting unit and the shear force loading unit are respectively arranged on two sides of the segment joint. Axially limiting the test duct piece through a duct piece axial limiting unit; vertically limiting a duct piece plate on one side of a duct piece joint through a duct piece vertical limiting unit; and loading the shear force on the segment plate on the other side of the segment joint through the shear force loading unit, and acquiring the performance data of the segment joint when the segment joint bears the shear force in the corresponding direction. The utility model provides a test device can simulate section of jurisdiction tip restraint condition betterly to make the test condition be close section of jurisdiction direct shear test's ideal condition state more, improve the accuracy and the reliability of experimental structure.
Description
Technical Field
The utility model belongs to the technical field of tunnel engineering, concretely relates to shield constructs section of jurisdiction joint direct shear test device.
Background
The shield method plays an important role in the current tunnel construction method, particularly in municipal and large-scale underwater tunnels and other projects. The shield segment is used as a lining structure of a shield tunnel, once the shield segment is damaged, the construction and operation of a project are seriously influenced, and the repair is very difficult, so that the research on the stress characteristic is very important; the segment joint is used as a connecting device and a weak link of the segment and is an object of important research. Under such a background, the research on the segment joint test is increasing in recent years, the research range is also increasing, and as the general segment joint loading test continues deeper, the segment joint direct shear test begins to become a new research point.
The existing joint test loading device simulates axial force of a duct piece by using horizontal thrust, vertical load is applied to two sides of the duct piece joint through a jack, bending moment of the duct piece joint is simulated, and bearing capacity and bending resistance of the duct piece joint are further measured. Such devices are generally used for joint bending tests and are not directly suitable for joint direct shear tests. Part is the loading device of direct shear test design, though has changed to direct shear test's characteristic, still is difficult to satisfy the test piece constraint condition under the ideal state.
The loading device has the following defects in a direct shear test:
(1) the simulation of boundary conditions by the conventional direct shear test loading device and the conventional duct piece joint bending moment loading device is generally inconsistent with an ideal state. Because the restraint of the two ends of the duct piece and the stress state of the duct piece cannot be well simulated, the test piece is influenced by additional bending moment or displacement more or less and is not consistent with a stress model of 'only being subjected to axial force and shearing force' in expectation, so that the deviation of an experimental result is large;
(2) the loading device applies shearing force through a jack in a certain specific direction, only the shearing force can be applied to the segment from one direction, if the shearing force in the other direction needs to be applied, the segment must be disassembled firstly, then the segment is turned over and then the segment is installed again, and the alternating bending moment cannot be applied to the segment without gaps. Under the action of earthquake, the shearing directions of the joints of the segment joints under the action of earthquake waves are dynamically and alternately changed, so that the existing test device can not carry out the anti-seismic (direct shear) performance test of the segment joints under the action of the earthquake.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a shield constructs section of jurisdiction joint direct shear test device can solve prior art's part defect at least.
The utility model relates to a shield constructs section of jurisdiction joint direct shear test device, which comprises a frame, be equipped with section of jurisdiction axial spacing unit, the vertical spacing unit of section of jurisdiction and shear force loading unit in the frame, the vertical spacing unit of section of jurisdiction with relative position relation between the shear force loading unit satisfies: after the test segment is axially limited by the segment axial limiting unit, the segment vertical limiting unit and the shear force loading unit are respectively arranged on two sides of the segment joint.
As one of the implementation modes, the segment vertical limiting unit comprises a reaction frame, the reaction frame comprises a frame seat installed on the frame, a lower bearing platform used for abutting against the bottom end of the segment and an upper bearing platform used for abutting against the top end of the segment, and the upper bearing platform and the lower bearing platform are both arranged on the frame seat.
As one embodiment, the segment axial limiting unit comprises a first force transmission seat and a second force transmission seat, the first force transmission seat, the segment vertical limiting unit, the shear force loading unit and the second force transmission seat are sequentially arranged along the horizontal direction, the second force transmission seat is provided with a plurality of rolling members which are in rolling friction type contact with the end part of the test segment, and the axial direction of each rolling member is the horizontal direction and is perpendicular to the horizontal arrangement direction between the first force transmission seat and the second force transmission seat.
In one embodiment, the horizontal distance between the first force transmission seat and the second force transmission seat is adjustable.
In one embodiment, one of the force transmission seats is a fixed force transmission seat, and the other force transmission seat is a movable force transmission seat, and the movable force transmission seat is connected with an axial force loading unit;
or both the two force transmission seats are movable force transmission seats, one movable force transmission seat is connected with an axial force loading unit, and the other movable force transmission seat is correspondingly provided with a stroke end limiting baffle;
or the two force transmission seats are movable force transmission seats, and the two movable force transmission seats are connected with axial force loading units;
the movable force transmission seat is arranged on the rack in a sliding mode, and the sliding direction of the movable force transmission seat is parallel to the horizontal arrangement direction between the first force transmission seat and the second force transmission seat.
In one embodiment, the axial force loading unit includes a horizontal driving hydraulic cylinder in which the output shaft is in a horizontal direction.
In one embodiment, the shear loading unit comprises one or two sets of shear loading mechanisms,
when the shear force loading mechanisms are in one group, the shear force loading direction is a vertical upward direction or a vertical downward direction;
when the two groups of shear force loading mechanisms are arranged, the two groups of shear force loading mechanisms are respectively arranged at the upper side and the lower side of the segment mounting position on the rack.
As one embodiment, each group of shear loading mechanisms comprises a shear beam for contacting with the test segment to transfer shear force and a shear output structure arranged on one side of the shear beam away from the segment installation position, wherein the shear beam is slidably arranged on the rack and connected with the shear output structure.
In one embodiment, the shear loading mechanism includes a vertical driving hydraulic cylinder with an output shaft vertical to the axial direction.
The utility model discloses following beneficial effect has at least:
the utility model provides a test device, through the cooperation of section of jurisdiction axial spacing unit and the vertical spacing unit of section of jurisdiction, can simulate the required section of jurisdiction constraint condition of section of jurisdiction direct shear test better, reduce or avoid experimental section of jurisdiction to receive the circumstances such as additional moment of flexure, make the test result more accurate, true, reliable.
The utility model discloses further following beneficial effect has:
the utility model provides a test device, through set up the rolling component on the second passes power seat, the relative frictional resistance between the corresponding side tip of experimental section of jurisdiction and the second passes power seat is less, and this experimental section of jurisdiction possesses the condition of taking place free vertical displacement for the second passes power seat, simulates section of jurisdiction tip restraint condition betterly to make the test condition be close/simulate section of jurisdiction staight scissors experimental ideal condition state more, improve the accuracy and the reliability of experimental structure.
The utility model discloses further following beneficial effect has:
the utility model provides a test device adopts two sets of shear force loading mechanisms can realize the dynamic load in turn to the positive and negative shear force of experimental section of jurisdiction joint, realizes the test of working conditions such as shield structure section of jurisdiction joint anti-seismic performance, and the analog architecture is accurate reliable, provides more comprehensive, accurate, economy, safety, reliable test data for design, construction, operation in shield tunnel.
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, 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 the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a direct shear test device (employing a set of shear loading mechanisms) for a shield segment joint provided in an embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural diagram of a direct shear test device (using two sets of shear force loading mechanisms) for a shield segment joint provided by an embodiment of the present invention;
fig. 4 is a schematic structural view of a reaction frame according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-fig. 3, the embodiment of the utility model provides a shield constructs section of jurisdiction joint direct shear test device, which comprises a frame 1, be equipped with section of jurisdiction axial spacing unit, the vertical spacing unit of section of jurisdiction and shear force loading unit in the frame 1, the vertical spacing unit of section of jurisdiction with relative position relation between the shear force loading unit satisfies: after the test segment 2 is axially limited by the segment axial limiting unit, the segment vertical limiting unit and the shear force loading unit are respectively arranged on two sides of the segment joint.
The segment axial limiting unit is used for axially limiting the test segment 2; the vertical spacing unit of above-mentioned section of jurisdiction's effect lies in carrying out spacing on vertical side to experimental section of jurisdiction 2, avoids the section of jurisdiction of relevant position department to take place vertical displacement, and the shear force loading unit is used for loading the shear force to experimental section of jurisdiction 2 promptly.
In this embodiment, the segment joint is preferably a shield segment longitudinal joint, that is, the connecting position between two segment plates corresponding to the shield segment longitudinal joint can be understood, the segment structure after splicing two adjacent segment plates is the test segment 2, the segment vertical limiting unit acts on one of the segment plates, the shear force loading unit acts on the other segment plate, and the two segments are respectively arranged on two sides of the segment joint along the axial direction of the test segment 2. Those skilled in the art know that the axial force/axial force applied to the test segment 2 corresponds to the extrusion force between two segment plates in the actual segment ring, which is perpendicular to the longitudinal seam of the segment, such as the extrusion force between the capping block and the adjacent block; if a straight-plate type segment plate is used as the segment plate for the test (which is set as a conventional test condition), the axial direction of the segment plate is parallel to the longitudinal direction thereof and perpendicular to the width direction thereof.
The test device that this embodiment provided, through the spacing unit cooperation of section of jurisdiction axial and the vertical spacing unit of section of jurisdiction, can simulate the required section of jurisdiction constraint condition of section of jurisdiction direct shear test better, reduce or avoid experimental section of jurisdiction 2 to receive the circumstances such as additional moment of flexure, make the test result more accurate, true, reliable.
Further optimizing the above embodiment, as shown in fig. 1 to 3, the segment axial limiting unit includes a first force transmission seat 31 and a second force transmission seat 32, the first force transmission seat 31, the segment vertical limiting unit, the shear force loading unit and the second force transmission seat 32 are sequentially arranged along a horizontal direction, the second force transmission seat 32 is provided with a plurality of rolling members 321 for rolling friction type contact with the end of the test segment 2, and the axial direction of each rolling member 321 is a horizontal direction and is perpendicular to the horizontal arrangement direction between the first force transmission seat 31 and the second force transmission seat 32. Based on this structure, the relative frictional resistance between the corresponding side end of experimental section of jurisdiction 2 and the second biography power seat 32 is less, and this experimental section of jurisdiction 2 possesses the condition of taking place free vertical displacement for the second passes power seat 32, better simulation section of jurisdiction tip restraint condition to make experimental condition be close/simulate section of jurisdiction direct shear test's ideal condition state more, improve the accuracy and the reliability of experimental structure.
It should be noted that, due to the effect of the segment vertical limiting unit, a rolling friction type contact condition may also be set between the corresponding side end portions of the first force transmission seat 31 and the test segment 2, but more preferably, a conventional contact friction manner is adopted between the first force transmission seat 31 and the test segment 2, for example, the corresponding end portion of the first force transmission seat 31 (i.e., the end portion thereof close to the second force transmission seat 32) is a steel plate, and the constraint state of the test segment 2 can be better achieved through the synergistic effect of the first force transmission seat 31 and the segment vertical limiting unit.
As for the rolling member 321, it can be a roller, in this embodiment, it is preferable to use a roller structure, for example, a row of steel rollers is arranged on the corresponding end of the second force transmission seat 32 from top to bottom, and the distance between two adjacent steel rollers is obviously smaller than the thickness of the test tube piece 2.
Further preferably, the horizontal distance between the first force transmission seat 31 and the second force transmission seat 32 is adjustable, so that the testing device can be suitable for direct shear tests of segment joints of shield segments with various specifications, and has good universality. The horizontal distance between the two can be manually adjusted, for example, a plurality of bolt installation positions are correspondingly arranged on the frame 1, and the distance adjustment is realized by the way that a bolt hole at the bottom of one force transmission seat is opposite to different bolt installation positions; obviously, the more preferable scheme is to adopt the mode of automatically regulated, and the remote control of being convenient for is high in security. Among them, there may be the following feasible design schemes: (1) one force transmission seat is a fixed force transmission seat, the other force transmission seat is a movable force transmission seat, and the movable force transmission seat is connected with an axial force loading unit; (2) the two force transmission seats are movable force transmission seats, one movable force transmission seat is connected with an axial force loading unit, and the other movable force transmission seat is correspondingly provided with a stroke end limiting baffle; (3) the two force transmission seats are movable force transmission seats, and the two movable force transmission seats are connected with axial force loading units. The movable force-transmitting seat is preferably slidably disposed on the frame 1 and has a sliding direction parallel to the horizontal arrangement direction between the first force-transmitting seat 31 and the second force-transmitting seat 32, for example, a roller or a traveling roller row (provided with corresponding track constraint) is disposed at the bottom of the movable force-transmitting seat.
Then, foretell activity passes power seat not only lies in can realizing above-mentioned interval regulatory function in order to be suitable for the shield structure section of jurisdiction of different specifications, still lies in contacting spacing and transmitting the effort of axial force loading unit to experimental section of jurisdiction 2, guarantees the effective restraint to experimental section of jurisdiction 2. And, based on above-mentioned structure, this test device not only can carry out section of jurisdiction joint direct shear test, has still possessed the experimental function of shield segment axial bearing capacity.
For the first force transmission seat 31 and the second force transmission seat 32, the following structures are preferably adopted: as shown in fig. 1 and 3, the force transmission seat comprises a base 301 and a force transmission table 302, the base 301 is L-shaped, the force transmission table 302 is arranged at the L-shaped groove of the base 301 and horizontally extends out of the base 301, so that one end of the force transmission table 302 extending out of the base 301 is used for contacting with the end part of the test segment 2, and the force transmission table 302 is in a substantially suspended state, in particular, the second force transmission seat 32 provided with a rolling member 321 is provided, and the rolling member 321 is arranged on the suspended force transmission table 302, so that the test segment 2 is guaranteed to have the purity of the condition of free vertical displacement relative to the second force transmission seat 32, and the accuracy of the test condition is guaranteed.
For the connection between the power transmission platform 302 and the base 301, detachable connection modes such as bolt assembly (for example, high-strength bolt fixing) can be adopted, so that the specification of the power transmission platform 302 can be adjusted as required, and the condition requirements of shield segments with different specifications can be met.
In one embodiment, the axial force loading unit comprises a horizontal driving hydraulic cylinder 5 with an output shaft in a horizontal direction; of course, linear driving devices such as air cylinders are also applicable to the present embodiment, and satisfy: the loading force can be conveniently adjusted, and the operation of detaching the duct piece, reinstalling the duct piece and the like can be realized without opening or stopping the duct piece immediately according to the working condition.
As a preferred embodiment of this embodiment, as shown in fig. 1, fig. 3 and fig. 4, the segment vertical limiting unit includes a reaction frame 4, the reaction frame 4 includes a frame seat 41 installed on the frame 1, a lower bearing platform 43 for abutting against the bottom end of the segment, and an upper bearing platform 42 for abutting against the top end of the segment, and both the upper bearing platform 42 and the lower bearing platform 43 are disposed on the frame seat 41. Wherein, the interval between last bearing platform 42 and the lower bearing platform 43 is preferred adjustable, so as to satisfy the experimental requirement of the shield section of jurisdiction of different specifications, for example, set up vertical guide bar 44 on frame seat 41, it sets up the guiding hole to go up bearing platform 42 correspondence, vertical guide bar 44 passes and passes through the spacing fixed of bolt after last bearing platform 42, thereby, last bearing platform 42 by the dead weight and fall to with the contact of 2 tops of experimental section of jurisdiction after, can guarantee through the bolt on the vertical guide bar 44 that this goes up bearing platform 42 and bearing platform 43 down all with experimental section of jurisdiction 2 in close contact with, guaranteed the vertical spacing effect to experimental section of jurisdiction 2 corresponding position department promptly. In addition, if the axial direction of the test tube piece 2 is taken as the X direction (i.e. the horizontal arrangement direction of the two force transmission seats), in an alternative embodiment, the test tube piece 2 can be limited in the Y direction by two vertical guide rods 44, which will not be described in detail herein. In the configuration shown in fig. 4, the bottom surface of the upper outrigger 42 and the top surface of the lower outrigger 43 are both planar.
The structure of the testing device is further optimized, the shear loading unit comprises one or two groups of shear loading mechanisms, and the shear loading mechanisms are used for loading shear force on the testing segment 2. As shown in fig. 1, when the shear loading mechanisms are in one group, the shear loading direction is a vertical upward direction or a vertical downward direction; as shown in fig. 3, when the two shear loading mechanisms are provided, the two shear loading mechanisms are respectively arranged at the upper side and the lower side of the segment mounting position on the rack 1. When a group of shear loading mechanisms are adopted, only the joint of the test segment 2 is subjected to test simulation of positive shear or negative shear at one time, and the test simulation in the other direction can be carried out by adopting the traditional way of detaching the segment, turning the segment and then reinstalling the segment; when two groups of shear force loading mechanisms are adopted, dynamic alternate loading of positive and negative shear forces of a joint of a test segment 2 can be realized, tests of working conditions such as the anti-seismic performance of a shield segment joint are realized, the simulation structure is accurate and reliable, and more comprehensive, accurate, economic, safe and reliable test data are provided for design, construction and operation of a shield tunnel.
Wherein, the shear force loading mechanism of top can install on frame 1 and guarantee to be located the top of section of jurisdiction installation position through portal frame 7.
Further preferably, as shown in fig. 1 and 3, each set of shear loading mechanisms comprises a shear beam 62 for contacting the test segment 2 so as to transfer shear force, and a shear output structure arranged on one side of the shear beam 62 away from the segment installation site, wherein the shear beam 62 is slidably arranged on the rack 1 and connected with the shear output structure. The surface of the shear beam 62 for direct contact with the test segment 2 is preferably a smooth surface, ensuring the purity of the test conditions. Obviously, the sliding direction of the shear beam 62 is parallel to the vertical direction, and the output direction of the shear output structure is parallel to the vertical direction, which is used for driving the shear beam 62 to approach or depart from the test segment 2, i.e. whether the shear beam 62 is loaded or not is realized. The shear force is transmitted through the shear beam 62, and the accuracy of the test conditions is ensured by the surface contact mode of the shear beam 62 and the test segment 2. In one embodiment, the shear loading mechanism/shear output mechanism includes a vertical driving hydraulic cylinder 61 with a vertical output shaft; of course, linear driving devices such as air cylinders are also applicable to the present embodiment, and satisfy: the loading force can be conveniently adjusted, the loading device can be started and stopped immediately according to working conditions, gapless alternate loading of positive and negative shearing forces is realized, and operations such as duct piece disassembly, duct piece reinstallation and the like are not needed.
The use method of the shield segment joint direct shear test device (namely the method for carrying out the segment joint direct shear test by adopting the shield segment joint direct shear test device) comprises the following steps:
(1) axially limiting the test segment 2 through a segment axial limiting unit;
(2) vertically limiting a duct piece plate on one side of a duct piece joint through a duct piece vertical limiting unit;
(3) and loading the shear force on the segment plate on the other side of the segment joint through the shear force loading unit, and acquiring the performance data of the segment joint when the segment joint bears the shear force in the corresponding direction.
In the step (1), the method may specifically include: the piston of the horizontal driving hydraulic cylinder 5 extends out to apply horizontal thrust to the second force transmission seat 32, so that the rolling component 321 on the second force transmission seat 32 is contacted with the corresponding end of the test segment 2; the thrust is transmitted to the test segment 2 through the rolling member 321, and the test segment 2 is further horizontally displaced and the other end thereof abuts against the first force transmission seat 31. Therefore, the test segment 2 is restrained by the two force transmission seats in the horizontal direction and is subjected to the thrust from the horizontal driving hydraulic cylinder 5, so that the simulation of the axial force bearing of the test segment 2 is realized;
in the step (3), when the shear loading unit includes a group of shear loading mechanisms, the method may specifically include: after horizontal axial force loading is completed, the piston of the vertical driving hydraulic cylinder 61 extends out, the top is on the shearing beam 62, the force applied by the piston is transmitted to the test segment 2 through the shearing beam 62, at the moment, the segment plate of one part of the test segment 2 is restrained by the first force transmission seat 31 and the reaction frame 4 together, displacement or rotation cannot occur, the segment plate of the other part of the test segment 2 is contacted with the rolling component 321 on the second force transmission seat 32, vertical displacement can occur freely, so that the joint position of the test segment 2 is in a shear force direct shearing state (only bearing positive shear force and not bearing bending moment), and the simulation of bearing shear force on a segment joint is realized.
In the step (3), when the shear loading unit includes two sets of shear loading mechanisms, the method may specifically include:
firstly, the piston of the upper vertical driving hydraulic cylinder 61 retracts, the piston of the lower vertical driving hydraulic cylinder 61 extends out and is propped against the shearing beam 62, and the force applied by the piston is transmitted to the test segment 2 through the shearing beam 62, so that the simulation of the positive shearing force borne by the joint of the test segment 2 is realized; until the set positive shear loading time is reached, the piston of the lower vertical driving hydraulic cylinder 61 retracts;
a piston of the upper vertical driving hydraulic cylinder 61 extends out and is pressed against the test segment 2, and the force applied by the piston is directly transmitted to the test segment 2, so that the simulation of the negative shearing force borne by the segment joint is realized; until the set negative shear loading time is reached, the piston of the upper vertical driving hydraulic cylinder 61 retracts;
and thirdly, repeating the steps of the first step and the second step, and alternately performing the first step and the second step to simulate the alternating loading of the positive shearing force and the negative shearing force on the pipe joint until the test is finished.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a shield constructs section of jurisdiction joint direct shear test device, includes the frame, its characterized in that, be equipped with section of jurisdiction axial spacing unit, the vertical spacing unit of section of jurisdiction and shear force loading unit in the frame, the vertical spacing unit of section of jurisdiction with relative position relation between the shear force loading unit satisfies: after the test segment is axially limited by the segment axial limiting unit, the segment vertical limiting unit and the shear force loading unit are respectively arranged on two sides of the segment joint.
2. The shield segment joint direct shear test device of claim 1, wherein: the vertical spacing unit of section of jurisdiction includes the reaction frame, the reaction frame including install in frame seat in the frame, be used for supporting the lower bearing platform that leans on with the section of jurisdiction bottom and be used for supporting the last bearing platform that leans on with the section of jurisdiction top, go up the bearing platform with the lower bearing platform all locates on the frame seat.
3. The shield segment joint direct shear test device of claim 1, wherein: the spacing unit of section of jurisdiction axial includes first biography power seat and second biography power seat, first biography power seat the vertical spacing unit of section of jurisdiction shear force loading unit with the second passes power seat and arranges along the horizontal direction in proper order, the second passes to be equipped with on the power seat and is used for with the contact of experimental section of jurisdiction tip rolling friction formula a plurality of rolling component, each rolling component's axial be the level to and perpendicular to first biography power seat with the horizontal arrangement direction between the second biography power seat.
4. The shield segment joint direct shear test device of claim 3, wherein: the horizontal distance between the first force transmission seat and the second force transmission seat is adjustable.
5. The shield segment joint direct shear test device of claim 4, wherein:
one force transmission seat is a fixed force transmission seat, the other force transmission seat is a movable force transmission seat, and the movable force transmission seat is connected with an axial force loading unit;
or both the two force transmission seats are movable force transmission seats, one movable force transmission seat is connected with an axial force loading unit, and the other movable force transmission seat is correspondingly provided with a stroke end limiting baffle;
or the two force transmission seats are movable force transmission seats, and the two movable force transmission seats are connected with axial force loading units;
the movable force transmission seat is arranged on the rack in a sliding mode, and the sliding direction of the movable force transmission seat is parallel to the horizontal arrangement direction between the first force transmission seat and the second force transmission seat.
6. The shield segment joint direct shear test device of claim 5, wherein: the axial force loading unit comprises a horizontal driving hydraulic cylinder with an output shaft in the horizontal direction.
7. The shield segment joint direct shear test device of claim 1, wherein: the shear loading unit comprises one or two groups of shear loading mechanisms,
when the shear force loading mechanisms are in one group, the shear force loading direction is a vertical upward direction or a vertical downward direction;
when the two groups of shear force loading mechanisms are arranged, the two groups of shear force loading mechanisms are respectively arranged at the upper side and the lower side of the segment mounting position on the rack.
8. The shield segment joint direct shear test device of claim 7, wherein: each group of shear loading mechanisms comprises a shear beam used for contacting with a test segment to transfer shear force and a shear output structure arranged on one side, far away from a segment mounting position, of the shear beam, and the shear beam is slidably arranged on the rack and connected with the shear output structure.
9. The shield segment joint direct shear test device of claim 7 or 8, wherein: the shear force loading mechanism comprises a vertical driving hydraulic cylinder with an output shaft in the vertical axial direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922079602.1U CN211453191U (en) | 2019-11-27 | 2019-11-27 | Shield segment joint direct shear test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922079602.1U CN211453191U (en) | 2019-11-27 | 2019-11-27 | Shield segment joint direct shear test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129620A (en) * | 2020-09-29 | 2020-12-25 | 中铁工程装备集团有限公司 | Pipe joint loading test distribution beam, test device and test method |
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2019
- 2019-11-27 CN CN201922079602.1U patent/CN211453191U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129620A (en) * | 2020-09-29 | 2020-12-25 | 中铁工程装备集团有限公司 | Pipe joint loading test distribution beam, test device and test method |
| CN112129620B (en) * | 2020-09-29 | 2024-05-17 | 中铁工程装备集团有限公司 | Pipe joint loading test distribution beam, test device and test method |
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