CN110907152A - Rotary cable clamp test device and test method - Google Patents
Rotary cable clamp test device and test method Download PDFInfo
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- CN110907152A CN110907152A CN201911121026.0A CN201911121026A CN110907152A CN 110907152 A CN110907152 A CN 110907152A CN 201911121026 A CN201911121026 A CN 201911121026A CN 110907152 A CN110907152 A CN 110907152A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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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
- G01N3/02—Details
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive 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
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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Abstract
A rotary cable clamp test device and a test method relate to the field of bridge construction and are used for performing a tension test on a test assembly; the test device comprises: the right-angle frame is in a right-angle triangle and comprises a main cable anchoring seat, a suspender anchoring seat, an inclined strut anchoring seat and a plurality of connecting pipes for connecting the three anchoring seats; the tensioning tool comprises a main cable tensioning device and a suspender tensioning device, the main cable tensioning device is used for tensioning the main cable and comprises two tensioning parts which are oppositely arranged, and the two tensioning parts are respectively fixed on a main cable anchoring seat and an inclined strut anchoring seat and are respectively penetrated through by two ends of the main cable; the suspender tensioning device is used for tensioning the suspender, one end of the suspender tensioning device is fixed on the suspender anchoring seat, and the other end of the suspender tensioning device is connected with one end of the suspender. The invention can truly simulate the stress condition of the rotary cable clamp applied to the self-anchored suspension bridge, and carry out the test of the rotary cable clamp.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a rotary cable clamp test device and a test method.
Background
The cable system of self-anchored suspension bridge is the main force-transferring component of suspension bridge, and is formed from main cable, cable clamp, sling and anchor plate, etc. the anchor plate on the beam and cable clamp are connected by means of sling, and the load can be transferred into main cable. The main cable has large span and more angle changes, is a space main cable, and designs a novel rotatable cable clamp in order to reduce radial torque caused by the angle changes (see Chinese invention patent CN 201910578533.0). Before the rotary cable clamp is applied to the self-anchored suspension bridge, whether various performances of the rotary cable clamp meet working requirements needs to be verified, namely, a test on the self-adaptive rotation performance of the rotary cable clamp in an operating state, a test on the anti-sliding performance of the rotary cable clamp, a test on the cold casting anchor performance of a main cable and a tension test of a suspender are needed, so that a set of test device for testing whether the rotary cable clamp can normally work needs to be designed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a rotary cable clamp test device and a test method, which can truly simulate the stress condition of a rotary cable clamp applied to a self-anchored suspension bridge and carry out test on the rotary cable clamp.
In order to achieve the above purposes, the technical scheme is as follows: a rotary cable clamp test device is used for simulating a main cable and a sling of a self-anchored suspension bridge and performing a tension test on a test assembly; the test assembly contains fixed cable clamp, rotatory cable clamp, main push-towing rope and jib, the test device contains: the right-angle frame is in a right-angle triangle and comprises a main cable anchoring seat, a suspender anchoring seat and an inclined strut anchoring seat which are respectively positioned at the vertex of the right-angle triangle, and a plurality of connecting pipes for connecting the three anchoring seats; the suspender anchoring seat and the inclined strut anchoring seat are respectively positioned at two ends of the inclined edge of the right-angled triangle; the tensioning tool comprises a main cable tensioning device and a suspender tensioning device, the main cable tensioning device is used for tensioning the main cable and comprises two tensioning parts which are oppositely arranged, and the two tensioning parts are respectively fixed on a main cable anchoring seat and an inclined strut anchoring seat and are respectively penetrated through by two ends of the main cable; the suspender tensioning device is used for tensioning the suspender, one end of the suspender tensioning device is fixed on the suspender anchoring seat, and the other end of the suspender tensioning device is connected with one end of the suspender.
On the basis of the technical scheme, each connecting pipe comprises a pipe body, two end plates and a plurality of reinforcing ribs, the pipe body is a round steel pipe, and each end of the pipe body is provided with the reinforcing ribs and the end plates; the end plates are vertically welded to the side end faces of the pipe body, and each end plate is provided with a plurality of mounting holes; the reinforcing ribs are uniformly distributed on the outer surface of the circumference of the pipe body at equal angles, and each reinforcing rib is welded and fixed on the pipe body and the end plate respectively.
On the basis of the technical scheme, the connecting pipe is divided into a first connecting pipe, a second connecting pipe and a third connecting pipe, and two ends of the first connecting pipe are respectively fixed on the main cable anchoring seat and the inclined strut anchoring seat through high-strength bolt groups; two ends of the second connecting pipe are respectively fixed on the main cable anchoring seat and the suspender anchoring seat through high-strength bolt groups; and two ends of the third connecting pipe are respectively fixed on the inclined strut anchoring seat and the suspender anchoring seat through high-strength bolt groups.
On the basis of the technical scheme, the test device further comprises a first pipe hoop and a second pipe hoop, wherein the first pipe hoop and the second pipe hoop are both rectangular with one side opened; the number of the first connecting pipe, the second connecting pipe and the third connecting pipe is four; the first pipe hoop is welded and fixed with the four first connecting pipes respectively, and the second pipe hoop is welded and fixed with the four second connecting pipes respectively.
On the basis of the technical scheme, the main cable anchoring seat is a cuboid and is provided with two perpendicular mounting surfaces; the main cable anchoring seat comprises an anchoring bottom plate, an anchoring seat tube, a mounting base and connecting plates, wherein a plurality of mutually perpendicular connecting plates are welded into a cuboid frame, the anchoring seat tube is welded and fixed at the center, and the axis of the anchoring seat tube is superposed with the central line of the cuboid; the two anchoring bottom plates are respectively arranged on the two installation surfaces, and each anchoring bottom plate is provided with a plurality of installation bases used for connecting the first connecting pipe and the second connecting pipe.
On the basis of the technical scheme, jib anchorage seat contains jib seat and otic placode connecting portion, the jib seat becomes right angle trapezoidal body, otic placode connecting portion slope install in the top surface of right angle trapezoidal body, the one end of second connecting pipe install in the top surface of right angle trapezoidal body, the one end of third connecting pipe install in the oblique waist face of right angle trapezoidal body, jib tensioning device install in otic placode connecting portion.
On the basis of the technical scheme, the lug plate connecting part comprises a lug plate cushion block, a lug plate rib plate and a lug plate bottom plate, one end of the lug plate is fixedly arranged on the lug plate bottom plate, and the plane of the lug plate is vertical to the top surface of the lug plate bottom plate; two sides of the other end of the ear plate are respectively provided with an ear plate cushion block; a plurality of ear panel ribs for reinforcing the ear panels; the hanger rod seat is formed by welding a plurality of steel plates and is integrally in a right-angle trapezoidal body, the top surface of the right-angle trapezoidal body is provided with an ear plate bottom plate, and the oblique waist surface of the right-angle trapezoidal body is also provided with a hanger rod bottom plate; the hanger rod bottom plate and the lug plate bottom plate are both provided with a plurality of installation bases for matching connection of the end plates.
On the basis of the technical scheme, the inclined strut anchoring seat comprises an inclined strut base, a first installation panel and a second installation panel, the inclined strut base is an inverted right-angle trapezoidal body, the first installation panel is installed on the top surface of the inverted right-angle trapezoidal body, and the second installation panel is installed on the inclined waist surface of the right-angle trapezoidal body; the first mounting panel and the second mounting panel are respectively provided with four mounting bases; two ends of the first connecting pipe are respectively installed on the installation base of the main cable anchoring seat and the installation base of the first installation panel; and two ends of the third connecting pipe are respectively installed on the installation base 4c on the suspender bottom plate 9g and the installation base of the second installation panel.
The invention also discloses a test method based on the rotary cable clamp test device, which comprises the following steps:
s1: welding and processing the main cable anchoring seat, the suspender anchoring seat and the diagonal bracing anchoring seat, and connecting the main cable anchoring seat, the suspender anchoring seat and the diagonal bracing anchoring seat by a plurality of connecting pipes to form a right-angle frame;
s2: installing a main cable, installing a main cable tensioning device and a suspender tensioning device, and tensioning and straining the main cable;
s3: installing a fixed cable clamp and a rotary cable clamp, wherein the fixed cable clamp is sleeved and fixed on the main cable, and the rotary cable clamp is rotatably sleeved on the fixed cable clamp;
s6: tensioning and tightening the main cable by using the main cable force, and marking two ends of the rotary cable clamp; the main cable force is obtained according to engineering experience;
s7: installing a suspender, stretching the suspender in a grading way by using gradually increased force until the stretching force is the force of the suspender, and observing whether the rotary cable clamp displaces relative to the fixed cable clamp or not; if not, judging that the rotary cable clamp is qualified; the sling force is obtained according to engineering experience.
On the basis of the technical proposal, the device comprises a shell,
in step S2, the tension force of the main tension cable is 300 kN;
in step S3, when installing the fixing cable clamp, it is necessary to ensure that the cylindricity error between the fixing cable clamp and the main cable is less than ± 6%;
in step S4, filling and corrosion prevention are also required to be performed on the gap of the fixing cable clamp;
in step S6, the main cable force of the tension main cable 2 is 200 kN;
at step S7, the hoist rope force is 400kN, and the step tension is 30%, 50%, 75% and 100% of 400kN respectively.
The invention has the beneficial effects that:
1. the test device can truly simulate the main cable and the sling of the self-anchored suspension bridge, carry out a tensioning test on the test assembly, simulate different stress conditions of the rotary cable clamp, the main cable and the suspender, ensure that the tensile force borne by the main cable tensioning device and the suspender tensioning device can meet the requirement of the tensile force of the test (namely the tensile force is greater than the main cable force and the sling force of the actual engineering), accurately carry out the test and solve the problem of the novel rotary cable clamp tensioning test detection.
2. The device can truly simulate various stress conditions from the installation construction process of the rotary cable clamp on the main cable of the bridge to the actual working process, is suitable for testing the self-adaptive rotation performance of the rotary cable clamp and the anti-sliding performance of the rotary cable clamp in the operating state, is also suitable for testing the main cable cold casting anchor performance of all self-anchored suspension bridges and the tension force of the suspender, and has wide application prospect.
Drawings
Fig. 1 is a general view of a rotating cable clamp test according to an embodiment of the present invention.
FIG. 2 is a schematic view of a right angle frame according to an embodiment of the present invention.
FIG. 3 is an X-direction view of the main cable anchor mount of FIG. 2.
Fig. 4 is a cross-sectional view taken along line Y-Y of fig. 3.
Fig. 5 is a sectional view a-a of fig. 4.
FIG. 6 is a schematic view of a connection tube according to an embodiment of the present invention
Fig. 7 is a sectional view B-B of fig. 6.
Fig. 8 is a schematic view of a first pipe clamp and a second pipe clamp according to an embodiment of the present invention.
FIG. 9 is a front view of a boom anchorage of an embodiment of the invention.
FIG. 10 is a left side view of a boom anchorage of an embodiment of the invention.
Fig. 11 is a cross-sectional view taken along line D-D of fig. 9.
FIG. 12 is a schematic view of a sprag anchor according to an embodiment of the invention.
Fig. 13 is a view of fig. 12, partially in direction E.
Fig. 14 is a view partially in the direction F of fig. 12.
Reference numerals: 1-rotary cable clamp, 2-main cable, 3-suspender, 4-main cable anchoring seat, 5-first connecting pipe, 6-first pipe hoop, 7-second connecting pipe, 8-second pipe hoop, 9-suspender anchoring seat, 10-third connecting pipe, 11-diagonal bracing anchoring seat, 12-high-strength bolt group, 13-main cable tensioning device, 14-suspender tensioning device, 15-fixing cable clamp, 4 a-anchoring base plate, 4 b-anchoring base pipe, 4 c-mounting base, 4 d-connecting plate, 5 a-pipe body, 5 c-end plate, 5 b-reinforcing rib, 9 a-lug plate cushion block, 9 b-lug plate, 9 c-lug plate rib plate, 9 e-lug plate base plate, 9 f-suspender seat, 9 g-suspender base plate, 9 g-diagonal bracing anchoring seat, 11 a-first mounting panel, 11 b-diagonal brace base, 11 c-second mounting panel, 110-rectangular portion, 111-triangular portion.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in figure 1, the rotary cable clamp test device is used for simulating a main cable and a sling of a self-anchored suspension bridge. The test device can carry out a tension test on the test assembly, truly simulate different stress conditions of the rotary cable clamp 1, and judge whether the rotary cable clamp 1 is qualified or not by observing whether the rotary cable clamp 1 displaces or not.
The test assembly comprises a fixed cable clamp 15, a rotary cable clamp 1, a main cable 2 and a suspender 3, the fixed cable clamp 15 is sleeved and fixed on the main cable 2, the rotary cable clamp 1 is rotatably sleeved on the fixed cable clamp 15, and one end of the suspender 3 is obliquely fixed on the rotary cable clamp 1.
The test device comprises a right-angle frame and a tensioning tool.
As shown in fig. 2, the right-angle frame is a right-angle triangle having three vertexes, and includes a main cable anchoring seat 4, a boom anchoring seat 9, and a sprag anchoring seat 11 respectively located at the three vertexes, and a plurality of connection pipes connecting the three anchoring seats. The suspender anchoring seat 9 and the inclined strut anchoring seat 11 are respectively positioned at two ends of the hypotenuse of the right triangle.
As shown in fig. 1, the tensioning tool includes a main cable tensioning device 13 and a boom tensioning device 14. The main cable tensioning device 13 is used for tensioning the main cable 2 and comprises two tensioning portions which are oppositely arranged, the two tensioning portions are respectively fixed on the main cable anchoring seat 4 and the inclined strut anchoring seat 11 and are respectively penetrated through two ends of the main cable 2. Specifically, the central axes of the two tension portions are coaxial with the central axis of the main cable 2. Two tensioning parts are located the outside of right angle frame, and during operation, two tensioning parts strain main push-towing rope 2 who is located between two tensioning parts. Preferably, the main cable tensioning device 13 and the boom tensioning device 14 both use a jack with a hollow middle part, and the main cable tensioning device 13 is formed by combining two jacks arranged oppositely.
The boom tensioning device 14 is used for tensioning the boom 3, and has one end fixed to the boom anchorage base 9 and the other end connected to one end of the boom 3. In particular, a boom tensioning device 14 is connected end to end with the boom 3 between the boom anchorage 9 and the swivel cable clamp 1.
As shown in fig. 6, each connecting tube comprises a tube body 5a, two end plates 5c, and a plurality of reinforcing ribs 5 b. The pipe body 5a is a circular steel pipe, and each end thereof is provided with a reinforcing rib 5b and an end plate 5 c. The end plates 5c are vertically welded to the side end faces of the pipe body 5a, and each end plate 5c is provided with a plurality of mounting holes, so that the pipe body 5a is conveniently connected with the anchoring seat. The reinforcing ribs 5b are uniformly distributed on the outer circumferential surface of the pipe body 5a at equal angles, each reinforcing rib 5b is welded and fixed on the pipe body 5a and the end plate 5c respectively, and the connection strength between the end plate 5c and the pipe body 5a is further enhanced.
Preferably, the reinforcing ribs 5b are four, the four reinforcing ribs 5b being at 90 degrees to each other. The plurality of mounting holes of each end plate 5c are the same in size, and the centers of the circles are located on a circle.
As shown in fig. 1, the connection pipe is divided into a first connection pipe 5, a second connection pipe 7 and a third connection pipe 10, and the three connection pipes are mainly distinguished by different lengths and different connection positions. Two ends of the first connecting pipe 5 are respectively fixed on the main cable anchoring seat 4 and the inclined strut anchoring seat 11 through high-strength bolt groups 12. Two ends of the second connecting pipe 7 are respectively fixed on the main cable anchoring seat 4 and the suspender anchoring seat 9 through high-strength bolt groups 12. Both ends of the third connecting pipe 10 are respectively fixed to the inclined strut anchorage seat 11 and the suspender anchorage seat 9 through high-strength bolt groups 12. The three types of connecting pipes form a right-angle frame, forming a foundation for the oblique arrangement of the suspender 3 relative to the main cable 2.
As shown in fig. 2 and 8, the testing apparatus further includes a first pipe clamp 6 and a second pipe clamp 8, wherein the first pipe clamp 6 and the second pipe clamp 8 are both rectangular with an opening at one side, and the two pipe clamps are mainly different in opening size. The number of the first connecting pipe 5, the second connecting pipe 7 and the third connecting pipe 10 is four; the four first connecting pipes 5, the four second connecting pipes 7 and the four third connecting pipes 10 are all arranged in a 2x2 mode, the first pipe hoop 6 is fixedly welded with the four first connecting pipes 5 respectively, and the second pipe hoop 8 is fixedly welded with the four second connecting pipes 7 respectively, so that the stability of the testing device is further enhanced.
Preferably, the first pipe clamp 6 and the second pipe clamp 8 are of the specification
The round steel of (1). In other embodiments, thicker steel plates may be used for the first and second pipe clamps 6 and 8.
As shown in fig. 3, 4 and 5, the main cable anchor 4 is a rectangular parallelepiped having two perpendicular installation surfaces (as shown in fig. 2), and the main cable anchor 4 includes an anchor base plate 4a, an anchor base tube 4b, an installation base 4c and a connection plate 4 d.
The connecting plates 4d which are perpendicular to each other are welded into a frame of the cuboid and are fixedly welded at the center of the frame and the anchoring seat tube 4b, the axis of the anchoring seat tube 4b is coincident with the central line of the cuboid, the two anchoring bottom plates 4a are respectively installed on two installation surfaces (only one schematic diagram of the anchoring bottom plates in the figures 3 and 4), each anchoring bottom plate 4a is provided with a plurality of installation bases 4c, and the installation bases 4c are used for being connected with the end parts of the first connecting tube 5 and the second connecting tube 7. The length of the anchoring seat tube 4b is equal to that of the cuboid, and when the cable fixing device is used, the main cable 2 penetrates through the anchoring seat tube 4 b.
Preferably, in this embodiment, each anchoring base plate 4a has 2 × 2 mounting bases 4 c. One end of the first connecting pipe 5 arranged in a 2x2 manner is correspondingly mounted on 4 mounting bases 4c on one anchor base plate 4a, and one end of the second connecting pipe 7 arranged in a 2x2 manner is correspondingly mounted on 4 mounting bases 4c on the other anchor base plate 4 a.
As shown in fig. 9, the boom anchoring base 9 includes a boom base 9f and an ear plate connecting portion, the boom base 9f is a right-angle trapezoidal body, the ear plate connecting portion is obliquely installed on the top surface of the right-angle trapezoidal body, one end of the second connecting pipe 7 is installed on the top surface of the right-angle trapezoidal body, one end of the third connecting pipe 10 is installed on the oblique waist surface of the right-angle trapezoidal body, and the boom tensioning device 14 is installed on the ear plate connecting portion.
As shown in fig. 10 and 11, the ear plate connecting portion includes an ear plate cushion block 9a, an ear plate 9b, an ear plate rib plate 9c and an ear plate bottom plate 9e, one end of the ear plate 9b is fixedly mounted on the ear plate bottom plate 9e, and the plane of the ear plate 9b is perpendicular to the top surface of the ear plate bottom plate 9 e; two sides of the other end of the ear plate 9b are respectively provided with an ear plate cushion block 9 a. The two ear plate spacers 9a facilitate the attachment of the ear plate connection to the boom tensioning device 14. The plurality of ear plates 9b are mounted on the top surface of the ear plate bottom plate 9e for reinforcing the ear plates 9b and further strengthening the strength of the ear plate connecting portion.
The hanger rod seat 9f is formed by welding a plurality of steel plates, the whole body is a right-angle trapezoidal body, the lug plate bottom plate 9e is installed on the top surface of the right-angle trapezoidal body, and the hanger rod bottom plate 9g is also installed on the oblique waist surface of the right-angle trapezoidal body. The hanger bar base plate 9g and the ear plate base plate 9e are each mounted with a plurality of mounting bases 4 c.
Two end plates 5c of the second connecting pipe 7 are respectively connected to a mounting base 4c of the main cable anchoring seat 4 and a mounting base 4c mounted on an ear plate bottom plate 9e in a matching manner; one of the end plates 5c of the third connecting pipe 10 is fittingly connected to a mounting base 4c mounted to the boom base plate 9 g. The end plate 5c and the mounting base 4c are fixedly connected through screws.
As shown in fig. 12, 13 and 14, the bracing anchor seat 11 comprises a bracing base 11b, a first mounting panel 11a and a second mounting panel 11c, the bracing base 11b is an inverted right-angle trapezoidal body, the first mounting panel 11a is mounted on the top surface of the inverted right-angle trapezoidal body, and the second mounting panel 11c is mounted on the oblique waist surface of the right-angle trapezoidal body; the first mounting panel 11a and the second mounting panel 11c each mount four mounting bases 4 c. The four mounting bases 4c on the first mounting panel 11a correspond to the mounting base 4c of one anchor baseplate 4a of the main cable anchor 4; the four mounting bases 4c on the second mounting panel 11c correspond to the mounting bases 4c on the boom base plate 9 g.
Two ends of the first connecting pipe 5 are respectively installed on an installation base 4c of the main cable anchoring seat 4 and an installation base 4c on the first installation panel 11 a; both ends of the third connecting pipe 10 are attached to the attachment base 4c on the boom base plate 9g and the attachment base 4c on the second attachment panel 11c, respectively.
In the present embodiment, the diagonal brace anchor seat 11 includes a rectangular portion 110 and a triangular portion 111, and the rectangular portion 110 has substantially the same structure as the main cable anchor seat 4, except that the main cable anchor seat 4 has two anchor bases 4a, and the rectangular portion 110 has only one anchor base 4 a. The rectangular part 110 includes an anchoring seat tube 4b, an anchoring base plate 4a, and four mounting bases 4c, and the central axes of the anchoring seat tube 4b of the rectangular part 110 and the anchoring seat tube 4b of the main cable anchoring seat 4 are located on the same straight line. The mounting base 4c on the anchor base plate 4a of the rectangular portion 110 corresponds to the mounting base 4c on one of the anchor base plates 4a of the main cable anchor 4.
The triangular part 111 is a triangular prism having a right-angled triangle cross section, four mounting bases 4c are similarly mounted on the inclined surface of the triangular part 111, and the mounting bases 4c correspond to the mounting bases 4c on the boom base plate 9 g.
In the present embodiment, all the mounting bases 4c are the same. In other embodiments, the mounting bases at two ends of the first connecting pipe 5 may be of one type, the mounting bases at two ends of the second connecting pipe 7 may be of another type, and the mounting bases at two ends of the third connecting pipe 10 may be of a third type.
Preferably, the suspension rod 3 is the middle line of the right-angle side of the right-angle frame (right-angle triangle) when the test device is used for testing.
The invention also discloses a test method based on the rotary cable clamp test device, which comprises the following steps:
s1: the main cable anchoring seat 4, the suspender anchoring seat 9 and the inclined strut anchoring seat 11 are welded and processed and are connected by a plurality of connecting pipes to form a right-angle frame.
S2: and installing a main cable 2, installing a main cable tensioning device 13 and a suspender tensioning device 14, and tensioning the main cable 2. At the moment, the tensioning is preliminary tensioning, and the main cable 2 is straightened and tightened, so that the fixed cable clamp 15 and the rotating cable clamp 1 are convenient to mount in S3.
S3: the fixed cable clamp 15 and the rotary cable clamp 1 are installed, the fixed cable clamp 15 is sleeved and fixed on the main cable 2, and the rotary cable clamp 1 is rotatably sleeved on the fixed cable clamp 15.
S6: the main cable 2 is tensioned by the main cable force, and the two ends of the rotating cable clamp 1 are marked. The main cable force is the tensile force borne by the main cable 2 of the self-anchored suspension bridge when the main cable works actually, and the specific numerical value is obtained according to more engineering experience.
S7: installing the suspender 3, stretching the suspender 3 by gradually increasing force in a grading way until the stretching force is the sling force, and observing whether the rotary cable clamp 1 displaces relative to the fixed cable clamp 15 or not; if not, judging that the rotary cable clamp 1 is qualified; if the displacement occurs, the rotating cable clamp 1 is judged to be unqualified. The sling force is the tensile force borne by the sling of the self-anchored suspension bridge during actual work, and the specific numerical value is obtained according to more engineering experience.
Preferably, in the present embodiment, in step S2, the tension force of the tension main rope 2 is 300 kN.
In step S3, when installing the fixing cable clamp 15, the cylindricity error between the fixing cable clamp 15 and the main cable 2 needs to be ensured to be less than ± 6%, so as to prevent the main cable from sliding and ensure that the fixing cable clamp 15 is installed well.
In step S4, in order to truly simulate the installation situation of the fixing cable clamp 15, it is also necessary to fill the gap of the fixing cable clamp 15 with corrosion protection, so that the simulated situation is closer to the actual situation.
In step S6, the main cable force for tensioning the main cable 2 is 200kN, which is obtained from the actual engineering experience.
At step S7, the sling force was found to be 400kN from practical engineering experience, and 30%, 50%, 75% and 100% of 400kN were used for the graded tensioning, respectively.
The working principle of the test device is as follows:
as shown in fig. 1, after the installation of the test device is completed, the main cable 2 passes through one tension portion of the main cable tension device 13, the anchor seat tube 4b of the main cable anchor seat 4, the anchor seat tube 4b of the diagonal brace anchor seat 11, and the other tension portion of the main cable tension device 13 in this order.
Two stretching parts of the main cable stretching device 13 stretch and tighten the main cable 2 by main cable force.
The suspender tensioning device 14 is used for tensioning the suspender by using gradually increased force until the tensioning force is the sling force, and if the sling force is the sling force, whether the rotary cable clamp 1 displaces relative to the fixed cable clamp 15 is observed; if not, the rotating cable clamp 1 is applied to the self-anchored suspension bridge, no slippage occurs, and the anti-skidding performance of the rotating cable clamp 1 is good. At the same time, a certain external force is applied to the rotating cable clamp 1, and whether the rotating cable clamp 1 can rotate relative to the fixed cable clamp 15 is observed, if so, the rotating cable clamp 1 has good self-adaptive rotation performance.
In addition, the test device can also test the cold casting anchor performance of the main cable 2 and the tension force of the suspender 3 by adjusting different tension forces.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. A rotary cable clamp test device is used for simulating a main cable and a sling of a self-anchored suspension bridge and performing a tension test on a test assembly; the experimental subassembly contains fixed cable clip (15), rotatory cable clip (1), main push-towing rope (2) and jib (3), its characterized in that, the test device contains:
the right-angle framework is in a right-angle triangle and comprises a main cable anchoring seat (4), a suspender anchoring seat (9), an inclined strut anchoring seat (11) and a plurality of connecting pipes for connecting the three anchoring seats, wherein the main cable anchoring seats, the suspender anchoring seats and the inclined strut anchoring seats are respectively positioned at the vertexes of the right-angle triangle; the suspender anchoring seat (9) and the inclined strut anchoring seat (11) are respectively positioned at two ends of the hypotenuse of the right triangle;
the tensioning tool comprises a main cable tensioning device (13) and a suspender tensioning device (14), wherein the main cable tensioning device (13) is used for tensioning the main cable (2) and comprises two tensioning parts which are oppositely arranged, and the two tensioning parts are respectively fixed on a main cable anchoring seat (4) and an inclined strut anchoring seat (11) and are respectively penetrated through by two ends of the main cable (2); the suspender tensioning device (14) is used for tensioning the suspender (3), one end of the suspender tensioning device is fixed on the suspender anchoring seat (9), and the other end of the suspender tensioning device is connected with one end of the suspender (3).
2. A rotary cable clamp test apparatus according to claim 1, wherein: each connecting pipe comprises a pipe body (5a), two end plates (5c) and a plurality of reinforcing ribs (5b), the pipe body (5a) is a round steel pipe, and each end of the pipe body is provided with the reinforcing ribs (5b) and the end plates (5 c); the end plates (5c) are vertically welded to the side end faces of the pipe bodies (5a), and each end plate (5c) is provided with a plurality of mounting holes; the reinforcing ribs (5b) are uniformly distributed on the outer surface of the circumference of the pipe body (5a) at equal angles, and each reinforcing rib (5b) is welded and fixed on the pipe body (5a) and the end plate (5c) respectively.
3. A rotary cable clamp test apparatus according to claim 2, wherein: the connecting pipe is divided into a first connecting pipe (5), a second connecting pipe (7) and a third connecting pipe (10), and two ends of the first connecting pipe (5) are respectively fixed on the main cable anchoring seat (4) and the inclined strut anchoring seat (11) through high-strength bolt groups (12); two ends of the second connecting pipe (7) are respectively fixed on the main cable anchoring seat (4) and the suspender anchoring seat (9) through high-strength bolt groups (12); and two ends of the third connecting pipe (10) are respectively fixed on the inclined strut anchoring seat (11) and the suspender anchoring seat (9) through high-strength bolt groups (12).
4. A rotary cable clamp test apparatus according to claim 3, wherein: the testing device also comprises a first pipe clamp (6) and a second pipe clamp (8), wherein the first pipe clamp (6) and the second pipe clamp (8) are both rectangular with one side open; the number of the first connecting pipes (5), the second connecting pipes (7) and the third connecting pipes (10) is four; the first pipe hoop (6) is fixedly welded with the four first connecting pipes (5) respectively, and the second pipe hoop (8) is fixedly welded with the four second connecting pipes (7) respectively.
5. A rotary cable clamp test apparatus according to claim 3, wherein: the main cable anchoring seat (4) is a cuboid and is provided with two mounting surfaces which are perpendicular to each other; the main cable anchoring seat (4) comprises an anchoring bottom plate (4a), an anchoring seat pipe (4b), a mounting base (4c) and connecting plates (4d), a plurality of mutually perpendicular connecting plates (4d) are welded into a rectangular frame, the anchoring seat pipe (4b) is welded and fixed at the center, and the axis of the anchoring seat pipe (4b) is superposed with the central line of the rectangular frame;
the two anchoring bottom plates (4a) are respectively arranged on the two installation surfaces, and each anchoring bottom plate (4a) is provided with a plurality of installation bases (4c) used for connecting the first connecting pipe (5) and the second connecting pipe (7).
6. A rotary cable clamp test apparatus according to claim 5, wherein: jib anchorage seat (9) contain jib seat (9f) and otic placode connecting portion, jib seat (9f) become right angle trapezoidal body, otic placode connecting portion slope install in the top surface of right angle trapezoidal body, the one end of second connecting pipe (7) install in the top surface of right angle trapezoidal body, the one end of third connecting pipe (10) install in the oblique waist face of right angle trapezoidal body, jib tensioning device (14) install in otic placode connecting portion.
7. A rotary cable clamp test apparatus according to claim 6, wherein: the ear plate connecting part comprises an ear plate cushion block (9a), an ear plate (9b), an ear plate rib plate (9c) and an ear plate bottom plate (9e), one end of the ear plate (9b) is fixedly arranged on the ear plate bottom plate (9e), and the plane where the ear plate (9b) is located is perpendicular to the top surface of the ear plate bottom plate (9 e); two sides of the other end of the ear plate (9b) are respectively provided with an ear plate cushion block (9 a); a plurality of ear panel ribs (9c) for reinforcing said ear panels (9 b);
the hanger rod seat (9f) is formed by welding a plurality of steel plates, the whole body is a right-angle trapezoidal body, the top surface of the right-angle trapezoidal body is provided with an ear plate bottom plate (9e), and the oblique waist surface of the right-angle trapezoidal body is also provided with a hanger rod bottom plate (9 g); the hanger rod bottom plate (9g) and the ear plate bottom plate (9e) are both provided with a plurality of mounting bases (4c) which are used for matching and connecting the end plates (5 c).
8. A rotary cable clamp test apparatus according to claim 7, wherein: the inclined strut anchoring seat (11) comprises an inclined strut base (11b), a first installation panel (11a) and a second installation panel (11c), the inclined strut base (11b) is an inverted right-angle trapezoidal body, the first installation panel (11a) is installed on the top surface of the inverted right-angle trapezoidal body, and the second installation panel (11c) is installed on the inclined waist surface of the right-angle trapezoidal body; the first mounting panel (11a) and the second mounting panel (11c) are provided with four mounting bases (4 c);
two ends of the first connecting pipe (5) are respectively installed on an installation base (4c) of the main cable anchoring seat (4) and an installation base (4c) of the first installation panel (11 a); and two ends of the third connecting pipe (10) are respectively installed on an installation base (4c) of the suspender bottom plate (9g) and an installation base (4c) of the second installation panel (11 c).
9. A test method based on the rotary cable clamp test device of claim 1 is characterized by comprising the following steps:
s1: the main cable anchoring seat (4), the suspender anchoring seat (9) and the inclined strut anchoring seat (11) are welded and processed, and are connected by a plurality of connecting pipes to form a right-angle frame;
s2: installing a main cable (2), installing a main cable tensioning device (13) and a suspender tensioning device (14), and tensioning and straining the main cable (2);
s3: installing a fixed cable clamp (15) and a rotary cable clamp (1), wherein the fixed cable clamp (15) is sleeved and fixed on the main cable (2), and the rotary cable clamp (1) is rotatably sleeved on the fixed cable clamp (15);
s6: tensioning and tightening the main cable (2) by using main cable force, and marking two ends of the rotary cable clamp (1); the main cable force is obtained according to engineering experience;
s7: installing the suspender (3), stretching the suspender (3) by gradually increasing force in a grading way until the stretching force is the cable-hanging force, and observing whether the rotary cable clamp (1) displaces relative to the fixed cable clamp (15); if not, judging that the rotary cable clamp (1) is qualified; the sling force is obtained according to engineering experience.
10. The assay of claim 9, wherein:
in step S2, the tension force of the main tension cable (2) is 300 kN;
in step S3, when the fixing cable clamp (15) is installed, the cylindricity error between the fixing cable clamp (15) and the main cable (2) needs to be ensured to be less than ± 6%;
in step S4, the gap of the fixing cable clamp (15) needs to be filled for corrosion prevention;
in step S6, the main cable force of the tension main cable 2 is 200 kN;
at step S7, the hoist rope force is 400kN, and the step tension is 30%, 50%, 75% and 100% of 400kN respectively.
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