CN218067481U - Full-scale shield constructs section of jurisdiction test device that bends - Google Patents
Full-scale shield constructs section of jurisdiction test device that bends Download PDFInfo
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- CN218067481U CN218067481U CN202222203274.3U CN202222203274U CN218067481U CN 218067481 U CN218067481 U CN 218067481U CN 202222203274 U CN202222203274 U CN 202222203274U CN 218067481 U CN218067481 U CN 218067481U
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Abstract
The utility model discloses a full-scale shield segment bending test device, which comprises a vertical force loading device and a horizontal force loading device; the vertical direction force loading device includes: the device comprises a portal frame anchored on the ground, and a jack which is arranged on a portal frame beam and applies vertical downward pressure to the shield segment; the horizontal direction force loading device includes: the connecting device comprises a left horizontal moving support and a right horizontal moving support which are correspondingly positioned on the radial left side and the radial right side of the shield segment, and a connecting device which is used for connecting the left horizontal moving support and the right horizontal moving support and applying horizontal force to the shield segment in opposite directions. The utility model discloses simple structure simplifies existing bending test device by a wide margin; the test device is convenient to detach, and the test field is convenient to manage. The slip surface of the force transfer block A and the arrangement of the horizontal moving support can release the angular displacement and the horizontal displacement of the segment at the end part, so that the error caused by the hyperstatic setting of the device is effectively reduced, and the stress state and the loading path of the bending test segment are easier to accurately control.
Description
Technical Field
The utility model relates to a relate to tunnel engineering equipment technical field, in particular to full-scale shield constructs section of jurisdiction test device that bends.
Background
At present, with the acceleration of the urbanization process and the dramatic increase of ground traffic, pressure is urgently needed to be shared by underground rail transit, and the construction of a shield tunnel is a key link. The lining of the shield tunnel is formed by combining prefabricated segments, the quality of the shield tunnel is closely related to the bearing capacity of the segments, and the segments need to be evaluated based on the actual bearing state in the design link.
The problem that the existing shield segment bending bearing capacity test exists has: the existing duct piece test is mainly a reduced scale test or is replaced by a straight beam test, so that the damage limit of the duct piece in the engineering cannot be really reduced; for shield segments with different sizes, a matched loading support needs to be manufactured, and the processing process is complicated and uneconomical; most of the loading devices for the segment bending experiment are heavy and difficult to transport and place. Therefore, a testing device with simple structure, strong applicability and reliable loading result is needed.
Disclosure of Invention
The utility model provides a full-scale shield constructs section of jurisdiction test device that bends for the technical problem who exists among the solution well-known technology.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a full-scale shield segment bending test device comprises a vertical force loading device and a horizontal force loading device; the vertical direction force loading device includes: the device comprises a portal frame anchored on the ground, and a jack which is arranged on a portal frame beam and applies vertical downward pressure to the shield segment; the horizontal direction force loading device includes: the shield segment comprises a left horizontal moving support and a right horizontal moving support which are correspondingly positioned at the radial left side and the radial right side of the shield segment, and a connecting device which is used for connecting the left horizontal moving support and the right horizontal moving support and applying horizontal force to the shield segment oppositely.
Furthermore, the horizontal force loading device also comprises a slide rail, and the left horizontal moving support and the right horizontal moving support are in sliding fit with the slide rail.
Furthermore, the horizontal force loading device also comprises a force transmission block A; the force transfer block A is positioned between the left horizontal moving support and the right horizontal moving support and the shield segment; one side of the shield segment is attached to the side face of the left or right horizontal moving support, and the other side of the shield segment is attached to the end face of the shield segment.
Furthermore, the force transfer block A comprises an inner force transfer block and an outer force transfer block, the inner force transfer block is in sliding fit with the outer force transfer block, and the combined surface of the inner force transfer block and the outer force transfer block is an arc-shaped surface; the inner force transfer block is attached to the end face of the shield segment; the outer force transfer block is attached to the side face of the left or right horizontal movable support.
Furthermore, the left horizontal moving support and the right horizontal moving support are provided with horizontal through holes; the connecting device includes: the connecting rod penetrates through the horizontal through holes of the left horizontal moving support and the right horizontal moving support, one end or two ends of the connecting rod are provided with threads, the hollow jack A is sleeved on the outer side of one end or two ends of the connecting rod, and the nut is in threaded connection with the connecting rod; and applying horizontal force to the shield segment by the hollow jack A.
Furthermore, the left horizontal moving support and the right horizontal moving support are provided with horizontal through holes; the connecting device includes: the steel strand penetrates through the through holes in the horizontal direction of the left horizontal moving support and the right horizontal moving support, the hollow jack B is sleeved at one end or the outer sides of two ends of the steel strand, and the anchorage device is fixedly connected with two ends of the steel strand; the hollow jack B is positioned between the anchorage device and the left or right horizontal moving support; and applying horizontal force to the shield segment by the hollow jack B.
Furthermore, the vertical force loading device also comprises an H-shaped distribution beam and a force transmission block B which are horizontally arranged, wherein the H-shaped distribution beam comprises a left wing beam, a right wing beam and a web beam; the length of the force transfer block B is matched with the width of the shield segment, the upper surface of the force transfer block B is a plane, and the lower surface of the force transfer block B is an arc-shaped surface matched with the outer surface of the shield segment; the jack is positioned between the portal frame cross beam and the web beam; the left and right wing spars are symmetrically positioned at the left and right sides of the top of the shield segment and transmit downward pressure to the shield segment through the force transmission block B.
Furthermore, solid steel bars are welded on the lower surfaces of the left and right wing spars.
Furthermore, the contact point of the solid steel bar and the force transmission block B is positioned above the circumferential trisection line of the outer surface of the shield segment.
Further, the left and right spars and the web beam are detachably assembled together; the length of the web beam is adjustable.
The utility model has the advantages and positive effects be: the utility model has simple structure, and greatly simplifies the existing bending test device; the test device is convenient to detach and manage a test field conveniently. The setting of the slip plane of biography power piece, horizontal migration support can release the section of jurisdiction in the angle displacement and the horizontal direction displacement of tip, effectively reduces because the device hyperstatic bringing error, changes the stress state and the loading path of accurate control bending test section of jurisdiction.
Drawings
Fig. 1 is the utility model discloses three-dimensional schematic diagram of section of jurisdiction bending test loading system.
Fig. 2 is the utility model discloses section of jurisdiction bending experiment loading system plane sketch map.
Fig. 3 is the schematic view of the horizontal moving support and the fixed slide rail of the present invention.
In the figure: 1, a portal frame; 2, horizontally moving the support; 3-steel strand; 4-H-shaped distribution beam; 5, a jack; 6, an anchorage device; 7-a pressure sensor; 8-hollow jack B; 9-a slide rail; 10-sliding rail cushion layer; 11-horizontal through holes; 12-rubber pad; 13-an inner force transfer block; 14-external force transmission block; 15-shield segment; 16-solid steel bar; 17-force transmission block B.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are listed and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 to 3, a full-scale shield segment bending test device includes a vertical force loading device and a horizontal force loading device; the vertical direction force loading device includes: the device comprises a portal frame 1 anchored on the ground, and a jack 5 which is arranged on a beam of the portal frame 1 and applies vertical downward pressure to a shield segment 15; the horizontal direction force loading device includes: the connecting device comprises a left horizontal moving support and a right horizontal moving support which are correspondingly positioned on the radial left side and the radial right side of the shield segment 15, and a connecting device which is used for connecting the left horizontal moving support and the right horizontal moving support and enabling the left horizontal moving support and the right horizontal moving support to apply horizontal force to the shield segment 15 in opposite directions. In fig. 1 and 2, the horizontal force loading device includes two horizontal moving supports 2, one is called a left horizontal moving support, and the other is called a right horizontal moving support, where the horizontal moving support 2 located at the radial left side of the shield segment 15 is called a left horizontal moving support, and the horizontal moving support 2 located at the radial right side of the shield segment 15 is called a right horizontal moving support.
Preferably, the horizontal force loading device further comprises a slide rail 9, and the left and right horizontal moving supports are in sliding fit with the slide rail 9. The left and right horizontal moving supports 2 and the slide rail 9 can adopt a sliding fit structure in the prior art, for example, the left and right horizontal moving supports and the slide rail 9 can adopt a linear guide rail pair to realize sliding fit, and the left and right horizontal moving supports can also be provided with a pulley which is in sliding fit with the slide rail 9.
Preferably, the horizontal force loading device can further comprise a force transmission block A; the force transfer block A can be positioned between the left horizontal moving support and the right horizontal moving support and the shield segment; one side of the shield segment can be attached to the side face of the left or right horizontal moving support, and the other side of the shield segment can be attached to the end face of the shield segment.
Preferably, the force transfer block A can comprise an inner force transfer block 13 and an outer force transfer block 14, the inner force transfer block 13 is in sliding fit with the outer force transfer block 14, the combined surface of the inner force transfer block 13 and the outer force transfer block 14 can be an arc-shaped surface, and the inner force transfer block 13 is attached to the outer surface of the shield segment 15; the external force transfer block 14 is jointed with the side surface of the left or right horizontal movable support 2. The joint surface of the force transfer block and the external force transfer block 14 is a sliding surface which keeps lubrication, and the mutual sliding at the sliding surface can release the angular displacement of the end part of the test piece segment. The force transfer block A is arranged to ensure that the force transfer block A is always attached to the end part of the test segment, and the stress points of the shield segment 15 are uniform.
Preferably, the left and right horizontal moving supports may be provided with horizontal through holes 11; the connection device may include: a connecting rod which penetrates through the horizontal through holes 11 of the left and right horizontal moving supports 2 and has threads at one end or two ends, a hollow jack A sleeved outside one end or two ends of the connecting rod, and a nut in threaded connection with the connecting rod; the horizontal force can be applied to the shield segment 15 by the hollow jack A.
Preferably, the left and right horizontal moving supports may be provided with horizontal through holes 11; the connection device may include: the steel strand 3 penetrates through a horizontal through hole 11 of the left and right horizontal moving supports 2, the hollow jack B8 sleeved on the outer side of one end or two ends of the steel strand 3, and the anchorage device 6 fixedly connected with two ends of the steel strand 3; the hollow jack B8 is positioned between the anchorage device 6 and the left or right horizontal moving support 2; the hollow jack B8 can apply horizontal force to the shield segment 15.
Preferably, the vertical force loading device can also comprise an H-shaped distribution beam 4 and a force transfer block B17 which are horizontally placed, wherein the H-shaped distribution beam 4 can comprise a left spar, a right spar and a web beam; the length of the force transfer block B17 can be matched with the width of the shield segment 15, the upper surface of the force transfer block B can be a plane, and the lower surface of the force transfer block B can be an arc-shaped surface matched with the outer surface of the shield segment 15; the jack 5 can be positioned between the cross beam and the web beam of the portal frame 1; the left and right wing spars can be symmetrically positioned at the left and right sides of the top of the shield segment 15 and transmit downward pressure to the shield segment 15 through the force transmission block B17.
Preferably, the lower surfaces of the left and right spars may be welded with solid steel bars 16. Solid steel bars 16 are welded below the wing spars on two sides of the H-shaped distribution beam 4, so that vertical pressure can be accurately distributed to the test tube sheets.
Preferably, the contact point of the solid steel bar 16 and the force transfer block B17 may be located above the circumferential trisection line of the outer surface of the shield segment 15. The stress point of the outer surface of the shield segment 15 can be adjusted by adjusting the length of the web beam.
Preferably, the left and right spars and web are detachably assembled together; the length of the web beam can be adjusted. A web member is provided which includes a set of webs of different lengths.
Preferably, the force transfer block B17 may be a force transfer block made of an elastic material.
Preferably, the jack 5 may be a hollow jack, named hollow jack C.
English letters A, B and C are added behind the hollow jacks for naming and distinguishing the hollow jacks at different positions.
Preferably, a pressure sensor 7 can be installed at the tail ends of the hollow jack A, the hollow jack B8, the hollow jack C, the jack and the like for monitoring the applied load in real time. A patch type pressure sensor 7 can also be arranged on the stress surface of the shield segment 15, such as a piezoelectric sensor and the like to detect the stress condition of the shield segment 15.
Preferably, the horizontal moving support 2 is made of steel, and two sides of the horizontal moving support can be provided with 4 horizontal through holes 11 with the diameter of 80mm.
Preferably, the horizontal movable support 2 is connected with the outer force transfer block 14 by welding.
Preferably, lubricating oil is coated on sliding surfaces of the inner force transfer block 13 and the outer force transfer block 14, so that the inner force transfer block 13 can freely slide along the sliding surfaces, and angular displacement of the test tube piece at the end part is released.
Preferably, four pulleys are arranged at the bottoms of the horizontal moving support 2 and the outer force transmission block 14, and can slide along the horizontal direction on the sliding rail 9 through the pulleys, so that the horizontal displacement of the test segment in loading is released.
Preferably, a slide rail cushion layer 10 is arranged below the slide rail 9, so that the position of the slide rail is convenient to fix and adjust.
Preferably, the slide rail 9 is made of solid steel.
Preferably, the slide rail 9 is connected with the slide rail cushion layer 10 through a steel fastener.
The hollow jack A, the hollow jack B8 and the hollow jack C can be hollow jacks with the same structure, and the components such as the H-shaped distribution beam 4, the pressure sensor 7, the patch type pressure sensor 7 and the like can adopt applicable components in the prior art.
The structure and operation of the present invention will be further described with reference to a preferred embodiment of the present invention:
a full-scale shield segment bending test device comprises a vertical force loading device and a horizontal force loading device; the vertical direction force loading device includes: the device comprises a portal frame 1 anchored on the ground, and a jack 5 which is arranged on a beam of the portal frame 1 and applies vertical downward pressure to a shield segment 15; the jack 5 is preferably a hollow jack C; the horizontal direction force loading device includes: the left and right horizontal moving supports correspondingly positioned at the left and right sides of the shield segment 15, and a connecting device which is used for connecting the left and right horizontal moving supports and enabling the left and right horizontal moving supports and the left and right horizontal moving supports to apply horizontal force to the shield segment 15 oppositely. The left horizontal moving support and the right horizontal moving support are provided with horizontal through holes 11; the connecting device includes: the steel strand 3 penetrates through a horizontal through hole 11 of the left and right horizontal moving supports, the hollow jack B8 sleeved on the outer side of one end or two ends of the steel strand 3, and the anchorage device 6 fixedly connected with two ends of the steel strand 3; the hollow jack B8 is positioned between the anchorage device 6 and the left or right horizontal moving support 2; and a horizontal force is applied to the shield segment 15 by the hollow jack B8.
The pressure required by loading the duct piece is respectively provided by a horizontal hollow jack and a vertical hollow jack, the vertical counter force is born by a portal frame 1, and the steel strand 3 is connected with two horizontal moving supports 2 to bear the horizontal counter force. The portal frame 1 is anchored on the ground and used for providing vertical counter force.
The left horizontal moving support 2 and the right horizontal moving support 2 are arranged at the center position under the portal frame 1, and each horizontal moving support 2 is provided with four horizontal through holes 11. The hollow jacks B8 are arranged on the horizontal moving support 2 on the same side, and the centers of the four hollow jacks are aligned with the center of the horizontal through hole 11. The diameter of the horizontal through hole 11 is 80mm.
The steel strand wires 3 are divided into 4 groups, penetrate through the horizontal through holes 11 and are fixed through the anchorage devices 6, the two horizontal moving supports 2 and the hollow jack are connected, and required horizontal pressure is provided for the test segment through the tensioning steel strand wires 3.
The specification of the steel strand 3 is a 1 multiplied by 7 structure, and the maximum bearing tension is 250kN. The loading system is provided with four groups of steel strands 3, wherein each group comprises 8 steel strands, the total bearing tension is 8000kN, and each steel strand is 6m long.
The test requires that the maximum 1000kN force can be applied to the horizontal direction of the test segment, the elongation of each steel strand 3 can be calculated to be 4.73mm, and the steel strand 3 is known to have small change and negligible influence on the test result.
The utility model discloses combine together portal frame 1 and horizontal migration support 2, realize horizontal direction effort and vertical direction effort, separately control, loading simultaneously. The pressure required by loading the duct piece is provided by a horizontal hollow jack B8 and a vertical hollow jack C, and the counter force in the vertical direction is borne by the portal frame 1. The hollow jack B8 tensions the steel strands 3 on two sides of the horizontal moving support 2 to apply horizontal force to the shield segment 15. The horizontal moving support 2 is connected with four groups of steel strands 3 and anchors 6 to form a horizontal force loading device.
The left-right and up-down directions are based on fig. 1 and 2, and only the relative positional relationship between the components and parts is shown.
The above embodiments are only used to illustrate the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and accordingly to implement the present invention, and the scope of the present invention should not be limited by the embodiments, i.e. all equivalent changes or modifications made by the spirit of the present invention still fall within the scope of the present invention.
Claims (10)
1. A full-scale shield segment bending test device is characterized by comprising a vertical force loading device and a horizontal force loading device; the vertical direction force loading device includes: the device comprises a portal frame anchored on the ground, and a jack which is arranged on a portal frame beam and applies vertical downward pressure to the shield segment; the horizontal direction force loading device includes: the connecting device comprises a left horizontal moving support and a right horizontal moving support which are correspondingly positioned on the radial left side and the radial right side of the shield segment, and a connecting device which is used for connecting the left horizontal moving support and the right horizontal moving support and applying horizontal force to the shield segment in opposite directions.
2. The full-scale shield segment bending test device according to claim 1, wherein the horizontal force loading device further comprises a slide rail, and the left and right horizontal moving supports are in sliding fit with the slide rail.
3. The full-scale shield segment bending test device according to claim 1, wherein the horizontal force loading device further comprises a force transfer block A; the force transfer block A is positioned between the left and right horizontal moving supports and the shield segment; one side of the shield segment is attached to the side face of the left or right horizontal moving support, and the other side of the shield segment is attached to the end face of the shield segment.
4. The full-scale shield segment bending test device according to claim 3, wherein the force transfer block A comprises an inner force transfer block and an outer force transfer block, the inner force transfer block is in sliding fit with the outer force transfer block, and the joint surface of the inner force transfer block and the outer force transfer block is an arc surface; the inner force transfer block is attached to the end face of the shield segment; the outer force transfer block is attached to the side face of the left or right horizontal moving support.
5. The full-scale shield segment bending test device according to claim 1, wherein the left and right horizontal moving supports are provided with horizontal through holes; the connecting device includes: a connecting rod which passes through the horizontal through holes of the left and right horizontal moving supports and is provided with threads at one end or two ends, a hollow jack A sleeved outside one end or two ends of the connecting rod, and a nut in threaded connection with the connecting rod; and applying horizontal force to the shield segment by using the hollow jack A.
6. The full-scale shield segment bending test device according to claim 1, wherein the left and right horizontal moving supports are provided with horizontal through holes; the connecting device includes: the steel strand penetrates through the through holes in the horizontal direction of the left horizontal moving support and the right horizontal moving support, the hollow jack B is sleeved at one end or the outer sides of two ends of the steel strand, and the anchorage device is fixedly connected with two ends of the steel strand; the hollow jack B is positioned between the anchorage device and the left or right horizontal moving support; and applying horizontal force to the shield segment by the hollow jack B.
7. The full-scale shield segment bending test device according to claim 1, wherein the vertical force loading device further comprises a horizontally arranged H-shaped distribution beam and a force transfer block B, wherein the H-shaped distribution beam comprises a left wing beam, a right wing beam and a web beam; the length of the force transfer block B is matched with the width of the shield segment, the upper surface of the force transfer block B is a plane, and the lower surface of the force transfer block B is an arc-shaped surface matched with the outer surface of the shield segment; the jack is positioned between the portal frame cross beam and the web beam; the left and right wing spars are symmetrically positioned at the left and right sides of the top of the shield segment and transmit downward pressure to the shield segment through the force transmission block B.
8. The full-scale shield segment bending test device according to claim 7, wherein solid steel bars are welded on the lower surfaces of the left and right spars.
9. The full-scale shield segment bending test device according to claim 7, wherein the contact point of the solid steel bar and the force transmission block B is located above the circumferential trisection line of the outer surface of the shield segment.
10. The full-scale shield segment bending test device according to claim 7, wherein the left and right spars and the web beam are detachably assembled together; the length of the web beam is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222203274.3U CN218067481U (en) | 2022-08-22 | 2022-08-22 | Full-scale shield constructs section of jurisdiction test device that bends |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222203274.3U CN218067481U (en) | 2022-08-22 | 2022-08-22 | Full-scale shield constructs section of jurisdiction test device that bends |
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| Publication Number | Publication Date |
|---|---|
| CN218067481U true CN218067481U (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222203274.3U Active CN218067481U (en) | 2022-08-22 | 2022-08-22 | Full-scale shield constructs section of jurisdiction test device that bends |
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| Country | Link |
|---|---|
| CN (1) | CN218067481U (en) |
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- 2022-08-22 CN CN202222203274.3U patent/CN218067481U/en active Active
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