Suspension bridge rotation cable horizontal rotation cable saddle entering construction method and construction device

Abstract

The invention belongs to the field of suspension bridge construction, and particularly relates to a suspension bridge rotation cable horizontal rotation cable saddle entering construction method and device. The construction method comprises the steps of S1, cable strand sequence design and S2, cable strand saddle entering, specifically, 1 #-4 # cable strands are saddled according to the sequence from large-number cable strands to small-number cable strands, 5 #-121 # cable strands are grouped according to inclined 45-degree faces in the cable strand sequence design, the cable strands in the same group are put into a horizontal main cable saddle and a horizontal rotating cable saddle according to the sequence from large number to small number, and the cable strands in the same group are saddled according to the sequence from large number to small number. And then entering the vertical main cable saddle according to a sequence from small numbering to large numbering. The construction device comprises a back pressure device, the top surface elevation of the cable strand is lower than the bottom surface elevation of the same-layer partition plate at the outlet end of the rotating cable saddle through a back pressure lead screw, and pressure on the two sides of the partition plate is balanced. According to the construction method, by adjusting the saddle entering sequence of the cable strands, the maximum difference value of the number of the installation strands between the adjacent groove paths on the two sides of the main cable saddle partition plate is 1, the deflection of the horizontal side bulging force of the cable strands on the partition plate is minimum, and deformation of the partition plate is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of suspension bridge construction, and in particular relates to a suspension bridge revolving cable horizontal revolving cable saddle insertion construction method and a construction device. Background Art

[0002] The main cable saddles and loose cable saddles of the main cable of a conventional suspension bridge are both arranged vertically, using a regular hexagonal symmetrical arrangement. The cables are stacked one by one from bottom to top, and steel partitions are set between each row of cables. For the revolving cable suspension bridge in patent CN118145433A, the two main cable saddles of the bridge tower are arranged vertically, and the anchorage of the revolving bank is set with a horizontal main cable saddle and two horizontal revolving cable saddles. If the conventional cable strand arrangement of a suspension bridge is still adopted, the cable strands between the main cable saddle of the bridge tower and the anchor main cable saddle / revolving cable saddle will be misaligned, resulting in greater stress and affecting the safety of the main cable.

[0003] In response to this situation, patent CN114059451A proposes a method for arranging the strands of a suspension bridge revolving main cable, in which the strand numbers are arranged asymmetrically, the strands of adjacent grooves are arranged at equal heights, the strands are arranged in a 45° inclined plane, and the maximum difference in the number of installed strands between adjacent grooves does not exceed 2.

[0004] Although this patent solves the problem of cable strand arrangement, when entering the saddle, the horizontal cable saddle cable strand has one back pressure beam, and the vertical cable saddle cable strand has two back pressure beams. There is radial pressure caused by tension in the circular curve section of the steel wire section in the saddle groove. After entering the saddle, the single cable strand steel wire has a certain horizontal lateral bulging force. If the horizontal lateral bulging force of the two back pressure beams causes disturbance to the partition, it is 8 times the disturbance caused by the horizontal lateral bulging force of the one back pressure beam. Although the patent CN114059451A uses a 10mm thick toothed partition to claim that it can solve the problem of partition side bulging in the asymmetric cable strand arrangement. However, this partition is actually also used in the vertical main cable saddle in the construction of conventional suspension bridges. It is suitable for the case where the partition joint depth is one cable strand height, and it cannot guarantee that the partition deformation will be reduced during the saddle construction of the main cable strand of the rotary cable suspension bridge of the present invention.

[0005] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a suspension bridge revolving cable horizontal revolving cable saddle installation construction method and construction device, which greatly reduces the degree of partition deformation during the revolving cable suspension bridge main cable strand installation construction.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A suspension bridge revolving cable horizontal revolving cable saddle installation construction method, comprising the following steps:

[0009] S1. Cable sequence design: The main cable strands are arranged asymmetrically in a 45° inclined plane. The 121 main cable strands are numbered 1# to 121# and arranged in 13×13. The cable strand rows are numbered from one row to thirteen rows, and the cable strand columns are numbered from one column to thirteen columns. The number of cable strands in one row to thirteen rows is 3, 7, 9, 11, 11, 13, 13, 13, 11, 11, 9, 7, 3, and the number of cable strands in one column to thirteen columns is 3, 7, 9, 11, 11, 13, 13, 13, 11, 11, 9, 7, 3.

[0010] S2, rope into the saddle:

[0011] The order of cable strands entering the saddle is: first the horizontal main cable saddle → then the horizontal rotation cable saddle → then the vertical main cable saddle at the top of the bridge tower → finally the loose cable saddle; when the cable strands enter the saddle, they exert a reverse pressure on the cable strands at the outlet end of the horizontal rotation cable saddle, so that the elevation of the top surface of the cable strand is lower than the bottom surface elevation of the partition at the same level of the outlet of the horizontal rotation cable saddle;

[0012] The saddle of 1#~121# cables includes the following steps:

[0013] S21, 1#~4# cables are placed in the horizontal main cable saddle and horizontal transfer cable saddle in the order of cable with larger number → cable with smaller number; and after each cable is placed in the horizontal transfer cable saddle, the vertical main cable saddle is placed in sequence;

[0014] S22. For 5#~121# cables, the cables are grouped according to the inclined 45° plane in the cable sequence design, and the cables in the same group are placed in the horizontal main cable saddles and horizontal transfer cable saddles in the order of large-numbered cables → small-numbered cables, ensuring that the maximum difference in the number of cables on both sides of the same partition does not exceed 1; during the saddle placement of the horizontal transfer cable saddles, the vertical main cable saddles and loose cable saddles are not formally placed in the saddles temporarily; after all the cables in the inclined 45° plane of one layer of the horizontal transfer cable saddles are placed in the saddles, the vertical main cable saddles are placed in the order of small-numbered cables → large-numbered cables, ensuring that the maximum difference in the number of cables on both sides of the same partition does not exceed 1 when placing the cables in the saddles.

[0015] Further, in step S22, the 5# to 121# cables are grouped into: the first group of 5# to 9# cables, the second group of 10# to 16# cables, the third group of 17# to 24# cables, the fourth group of 25# to 31# cables, the fifth group of 32# to 39# cables, the sixth group of 40# to 48# cables, the seventh group of 49# to 56# cables, the eighth group of 57# to 65# cables, the ninth group of 66# to 73# cables, the tenth group of 74# to 82# cables, the eleventh group of 83# to 90# cables, the twelfth group of 91# to 97# cables, the thirteenth group of 98# to 105# cables, the fourteenth group of 106# to 112# cables, the fifteenth group of 113# to 118# cables, and the sixteenth group of 119# to 121# cables.

[0016] Further, in step S22, the eighth group of 57#-65# cables are placed in the horizontal main cable saddle and the horizontal rotation cable saddle in the order of 65#→64#→63#→62#→61#→60#→59#→58#→57#; during the process of placing the horizontal rotation cable saddle, the vertical main cable saddle and the south anchor loose cable saddle are temporarily not placed, and multiple cables and / or fillers among the 57#-65# cables are temporarily placed in two rows of grooves adjacent to the vertical main cable saddle so that the cables in the saddle grooves form an inclined 45° surface, and the remaining cables among the 57#-65# cables are temporarily placed in a temporary placement device provided on the vertical main cable saddle; after all cables in the inclined 45° surface of one layer of the horizontal rotation cable saddle are placed, the vertical main cable saddle is started to be placed in the order of 57#→58#→59#→60#→61#→62#→63#→64#→65#.

[0017] Furthermore, in step S2, square timber is stuffed before and after the cable strands are inserted into the saddle for compaction; when it is necessary to insert into the saddle, a support and tensioning tool is installed in advance in the groove for inserting into the saddle, and the support and tensioning tool presses the pressure rod on the side wall of the partition, and the pressure rod is used to balance the side drum force of the cable strands.

[0018] Furthermore, the supporting and pulling tooling includes a first screw rod and a second screw rod installed on the pressure rod, the end of the first screw rod away from the pressure rod is threadedly fixed in the base, and the end of the base away from the pressure rod is pressed against the inner wall of the saddle groove; the second screw rod passes through the pull rod through-hole of the saddle body and is locked and fixed by nuts arranged on both sides of the pressure rod and on the outside of the pull rod through-hole.

[0019] Furthermore, the partition used in step S2 is composed of three layers of toothed sub-partitions, and the height of the teeth of the sub-partitions is 2 or 3 times the thickness of the cable strands.

[0020] Furthermore, in step S2, two back-pressure devices are used to alternately back-pressure the rope strands at the outlet end of the horizontal turning saddle; the 1# back-pressure device is located 50 cm from the outlet end of the horizontal turning saddle, and the 2# back-pressure device is located 3 m away from the first back-pressure device.

[0021] Furthermore, after the cable strand enters the horizontal rotation saddle, two counter-pressure devices are used to counter-pressure the cable strand. The elevations of the two counter-pressure devices at the same cable strand are measured by a level meter to ensure that the top surface of the cable strand at the 2# counter-pressure device is lower than the top surface of the cable strand at the 1# counter-pressure device before proceeding to the next step of the construction of the new cable strand entering the saddle.

[0022] The present invention also proposes a horizontal saddle installation construction device for a suspension bridge revolving cable, which is applied to the aforementioned horizontal saddle installation construction method for a suspension bridge revolving cable, and includes a back-pressure device. The back-pressure device includes a back-pressure beam arranged directly above the cable strand path, and a plurality of back-pressure screw rods are threadedly installed on the back-pressure beam. The lower ends of the back-pressure screw rods are pressed against the top surface of each row of cable strands at the outlet end of the horizontal revolving cable saddle, so that the elevation of the top surface of the cable strand is lower than the elevation of the bottom surface of the same-layer partition at the outlet end of the revolving cable saddle, thereby balancing the pressure on both sides of the partition.

[0023] Furthermore, a 600mm×60mm×60mm square wood transition protection steel wire is arranged between the back-pressure screw rod and the cable strand steel wire to avoid hard contact.

[0024] The beneficial effects of the present invention are:

[0025] The construction method of the present invention adjusts the order of cable strands entering the saddle to avoid interlacing of the cables and twisting of the steel wires during the process of arranging the cables and entering the saddle, and at the same time makes the maximum difference in the number of installed cables between adjacent grooves on both sides of the main cable saddle partition to be 1, so that the disturbance of the horizontal side drum force of the cables on the partition is minimized, and the deformation degree of the partition is greatly reduced; at the same time, the partition joint depth is adjusted to the height of 3 cable strands, and the base of the partition is firmly positioned and stabilized by the side drum force of the 3 cable strands pressing the partition, which can reduce the deformation degree of the partition;

[0026] The construction device of the present invention applies reverse pressure to the strands of the air cable to change the horizontal saddle from an upwardly inclined state to a downwardly inclined state, thereby reducing the vertical component of the strands acting on the horizontal saddle partition and reducing the deformation of the partition. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0028] Figure 1 This is the cable strand arrangement of the horizontal saddle according to an embodiment of the present invention.

[0029] Figure 2 This is the cable strand arrangement of the vertical main cable saddle according to an embodiment of the present invention.

[0030] Figure 3 The diagram is a schematic diagram of the sequence in which the 57# to 65# cable strands of an embodiment of the present invention enter the horizontal rotation cable saddle.

[0031] Figure 4 The figure shows the temporary placement of the 57# to 65# cable strands in the vertical main cable saddle when the 57# to 65# cable strands enter the horizontal transfer cable saddle according to the embodiment of the present invention.

[0032] Figure 5The diagram is a schematic diagram of the order in which the 57# to 65# cable strands of the embodiment of the present invention enter the vertical main cable saddle.

[0033] Figure 6 Schematic diagram of the partition structure of an embodiment of the present invention.

[0034] Figure 7 It is a schematic diagram of the installation of the supporting and pulling tooling in the horizontal rotating cable saddle according to an embodiment of the present invention.

[0035] Figure 8 It is a schematic diagram of the installation of the supporting and pulling tooling in the vertical main rotating cable saddle according to an embodiment of the present invention.

[0036] Fig. 9 Schematic diagram of the installation of the back pressure device according to an embodiment of the present invention.

[0037] Fig.10 This is a schematic diagram of the operation of the 1# back pressure device according to an embodiment of the present invention.

[0038] In the figure: 1-horizontal pommel, 2-vertical pommel, 3-partition, 4-filling block, 5-pressure rod, 6-rod hole, 7-top support, 8-first screw rod, 9-second screw rod, 10-base, 11-first nut, 12-second nut, 13-third nut, 20-column, 21-connecting plate, 22-support structure, 23-back pressure beam, 24-oblique pull arm, 25-back pressure screw rod, 26-first locking piece, 27-second locking piece, 28-pad. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0041] A suspension bridge revolving cable horizontal revolving cable saddle installation construction method, comprising the following steps:

[0042] S1. Cable sequence design: The main cable strands are arranged asymmetrically in a 45° inclined plane. The 121 main cable strands are numbered 1# to 121# and arranged in 13×13. The cable strand rows are numbered from one row to thirteen rows, and the cable strand columns are numbered from one column to thirteen columns. The number of cable strands in one row to thirteen rows is 3, 7, 9, 11, 11, 13, 13, 13, 11, 11, 9, 7, 3, and the number of cable strands in one column to thirteen columns is 3, 7, 9, 11, 11, 13, 13, 13, 11, 11, 9, 7, 3. Figure 1 The arrangement of the cables in the horizontal main cable saddle and the horizontal transfer cable saddle of the present invention is shown in FIG. Figure 1 The horizontal saddle head 1 of the horizontal main saddle and the horizontal rotating saddle is schematically drawn; Figure 2 The middle is the arrangement of the cables in the corresponding vertical main cable saddle. Figure 2 A vertical saddle head 2 of the vertical main cable saddle at the top of the tower is schematically drawn;

[0043] S2, rope into the saddle:

[0044] The order of cable strands entering the saddle is: first the horizontal main cable saddle → then the horizontal rotation cable saddle → then the vertical main cable saddle at the top of the bridge tower → finally the loose cable saddle; when the cable strands enter the saddle, they exert a reverse pressure on the cable strands at the outlet of the horizontal rotation cable saddle, so that the elevation of the top surface of the cable strands is lower than the elevation of the bottom surface of the diaphragm 3 at the same level of the outlet of the horizontal rotation cable saddle, so that the cable strands no longer tilt upward, and the cable strands do not have a tendency to deform the diaphragm 3;

[0045] The saddle of 1#~121# cables includes the following steps:

[0046] S21, 1#~4# cables are placed in the horizontal main cable saddle and horizontal transfer cable saddle in the order of large cable number → small cable number; and after each cable is placed in the horizontal transfer cable saddle, it is placed in the vertical main cable saddle of the bridge tower; the base of the diaphragm 3 is welded to the bottom of the saddle groove, and the 4 cables are at the root of the diaphragm 3, which has almost no deformation effect on the diaphragm 3 or causes very little deformation, so 1#~4# cables can be placed in the normal order

[0047] S22. For 5#~121# cables, the cables are grouped according to the inclined 45° plane in the cable sequence design, and the cables in the same group are placed in the horizontal main cable saddle and the horizontal transfer cable saddle in the order of large-numbered cables → small-numbered cables, to ensure that the maximum difference in the number of cables on both sides of the same partition 3 does not exceed 1; during the placement of the horizontal transfer cable saddle, the vertical main cable saddle and the loose cable saddle are temporarily not placed; and during the placement of the horizontal transfer cable saddle, the existing cables in the saddle groove of the vertical main cable saddle are arranged to form an inclined 45° plane. The "cable strands are arranged to form an inclined 45° plane" is the result of following the principle that the number of cantilevers of the space-limiting cables on the partition 3 does not exceed 1; after all cables in the inclined 45° plane of the horizontal transfer cable saddle layer are placed, the tower top cable saddle is placed in the order of small-numbered cables → large-numbered cables.

[0048] The cable strand arrangement and saddle insertion sequence proposed in the patent CN114059451A is from small to large numbers, which will result in the cable strand difference of 2 on both sides of the partition 3 when the cable strands enter the horizontal main cable saddle and the horizontal transfer cable saddle. Figure 1 and Figure 3 As shown, for example, before the 59# cable strand enters the saddle, the upper end of the channel is the 52# cable strand, the inner end of the channel is the 43# and 51# cable strands, and the lower end of the channel is the 34#, 42#, 50#, and 58# cable strands; 52#, 43#, and 34# are in the same row, and the cable strand differences between the channel and the adjacent channels are 1 and 2, respectively. After the 59# cable strand enters the saddle, the cable strand differences between the channel and the adjacent channels are 2 and 1, respectively. In this invention, when the maximum difference between the cables on both sides of the partition 3 is 2 (i.e., the number of cable strands cantilevering the partition 3 is 2), the disturbance caused by the horizontal side drum force of the 2nd cantilever to the partition 3 is 8 times the disturbance caused by the horizontal side drum force of the 1st cantilever to the partition 3, and the partition 3 has a greater tendency to deform.

[0049] In order to minimize the disturbance caused by the horizontal side drum force of the cable strands to the partition 3, the present invention places the cable strands in the horizontal main cable saddle and the horizontal transfer cable saddle in the order of large number to small number in each layer of the inclined 45° plane, and keeps the order of placing the vertical main cable saddle from small number to large number. In this way, the difference between the cable strands on both sides of the partition 3 is 1 at most, which can effectively reduce the disturbance caused by the cable strands to the partition 3. Figure 1 and Figure 3 As shown, for example, before the 59# cable strand enters the horizontal cable saddle, the 60# cable strand has already entered the saddle, the upper groove end of the 59# cable strand is the 60# cable strand, the inner end of the 59# cable strand entering the saddle groove is the 51# cable strand, and the lower groove end of the 59# cable strand groove is the 42#, 50#, and 58# cable strands; the 60#, 51#, and 42# cables are in the same row, and the cable strand difference between the groove and the adjacent groove is 0 and 1 respectively. After the 59# cable strand enters the saddle, the cable strand difference between the groove and the adjacent groove is 1 and 0 respectively. Therefore, in the present invention, the maximum difference between the cables on both sides of the partition 3 is 1, and compared with the case where the partition 3 cantilever has two cables, the disturbance generated on the partition 3 can be reduced by 7 times, thereby reducing the deformation of the partition 3.

[0050] Specifically, in step S22, the 5# to 121# cables are grouped according to the oblique 45° plane into the following groups: the first group of 5# to 9# cables, the second group of 10# to 16# cables, the third group of 17# to 24# cables, the fourth group of 25# to 31# cables, the fifth group of 32# to 39# cables, the sixth group of 40# to 48# cables, the seventh group of 49# to 56# cables, the eighth group of 57# to 65# cables, the ninth group of 66# to 73# cables, The tenth group has 74# to 82# cable strands, the eleventh group has 83# to 90# cable strands, the twelfth group has 91# to 97# cable strands, the thirteenth group has 98# to 105# cable strands, the fourteenth group has 106# to 112# cable strands, the fifteenth group has 113# to 118# cable strands, and the sixteenth group has 119# to 121# cable strands. The cables in each group are inserted into the saddle in the order from the largest number to the smallest number, so as to ensure that the cable strand difference on both sides of the partition 3 is 1 or 0.

[0051] Specifically, when the first group of 5# to 9# cables, the second group of 10# to 16# cables, and the third group of 17# to 24# cables are saddled, the horizontal main cable saddle and the horizontal transfer cable saddle saddle the cables of each group according to the numbers from large to small, and then the vertical main cable saddle saddles the cables according to the numbers from small to large;

[0052] The fourth group of 25#~31# cables, the horizontal main cable saddle and the horizontal transfer cable saddle are inserted into the saddle according to the number from large to small, and then the vertical main cable saddle is inserted into the saddle according to the number from small to large; after that, after the 31# cable is inserted into the saddle, the groove at the edge (i.e. Figure 4 A layer of zinc filling blocks 4 is filled in the rightmost groove (denoted as the first groove), so that the cable strands in the vertical main saddle and the filling blocks 4 are 45 degrees, and the difference between the cable strands on both sides of the partition 3 is 1.

[0053] When the cables of the fifth to sixteenth groups are put into the saddle, the horizontal main cable saddle and the horizontal transfer cable saddle are put into the saddle according to the numbers from large to small, and then the vertical main cable saddle is put into the saddle according to the numbers from small to large;

[0054] Note that when all groups of cables are horizontally inserted into the saddle, the cables at the vertical main cable saddle are first temporarily placed on the temporary saddle groove outside the channel or temporarily placed in individual channels to ensure that the difference in the number of cables between two cables in each partition 3 is not greater than 1 when the cables are formally inserted into the vertical main cable saddle. The filling blocks 4 of the vertical main cable saddle are filled with zinc filling blocks 4 after all cables in each row are installed; the horizontal main cable saddle and the rotating cable saddle are filled with zinc filling blocks 4 after all cables in each row are installed, or the zinc filling blocks 4 are filled after all cables are installed.

[0055] Next, the saddle construction method of a single cable group is described in detail using the eighth group of 57# to 65# cables:

[0056] like Figure 3As shown, the eighth group of 57# to 65# cables enter the horizontal main cable saddle and the horizontal transfer cable saddle in the order of 65# → 64# → 63# → 62# → 61# → 60# → 59# → 58# → 57#. Figure 3 The arrows in the figure indicate the order in which the cables of this group are put into the saddle. During the process of putting the horizontal cable saddle into the saddle, the vertical main cable saddle and the south anchor loose cable saddle are not put into the saddle temporarily. The 61# cable strand, 60# cable strand and 58# cable strand are temporarily placed in the first groove of the main cable saddle, the 59# cable strand is placed in the second groove, the 62# to 65# cable strands are temporarily placed in the temporary saddle groove, and the 57# cable strand is temporarily placed on the catwalk roller, the side roller of the main cable saddle on the tower top, and the side roller of the south anchor loose cable saddle. Note that when temporarily placing cables in temporary saddle grooves and channels, you must pay attention to the order of placement, because each layer of the horizontal cable saddle is inserted from large to small numbers, and at the main cable saddle at the top of the tower, the large-numbered cables are located on the bottom surface / outside, and the small-numbered cables are located on the top surface / inside. Therefore, for temporary placement, the cables with small numbers should be placed on the upper layer, so that the small-numbered cables on the top surface / inside of the vertical main cable saddle at the top of the tower will be installed first, and will not interfere with the large-numbered cables / bottom surface / outside. In this group of cables, since there is a filler block 4 in the first channel, after the cables temporarily placed in the first channel are correctly inserted into the saddle, there will not be a situation where the cables on both sides of the partition 3 of the first channel differ by 2 strands. Figure 4 As shown, after multiple cable strands are temporarily placed in the saddle groove, the cable strands in the saddle groove form an inclined 45° surface; the temporary placement device includes a temporary saddle groove set on the top of the vertical main cable saddle groove plate and the existing catwalk rollers, the tower top main cable saddle, and the south anchor cable saddle side rollers. Figure 4 A maximum of 4 cable strands can be placed in the temporary saddle groove. In practice, the number of cable strands that can be accommodated in the temporary saddle groove can be increased by increasing the size and structural stiffness of the temporary saddle groove or increasing the number of temporary saddle grooves. However, this will increase the number of temporary measures. Therefore, the present invention adopts the principle that some cable strands are temporarily placed in the saddle groove, and the number of cable strand cantilevers limited by the partition 3 does not exceed 1 strand).

[0057] After all the cables in the 45° oblique plane of the horizontal cable saddle are installed, start installing the vertical main cable saddle in the order of 57#→58#→59#→60#→61#→62#→63#→64#→65#; Figure 5 The saddle entry trajectory of each cable strand is schematically drawn in the figure.

[0058] The joint depth of the diaphragm 3 of the cable strands of a conventional suspension bridge is one cable strand height. The horizontal side drum force of one cable strand cannot balance the horizontal side drum force of two cable strands by pressing the diaphragm 3. In addition, the cables of the suspension bridge are basically in the air, and strong winds will generate horizontal loads on the cables, which will also aggravate the deformation of the diaphragm 3. In response to this, the present invention adjusts the joint depth of the diaphragm 3 to three cable strand heights, and the base of the diaphragm 3 is firmly positioned and stabilized by pressing the diaphragm 3 by the side drum force of three cable strands. Combined with the aforementioned adjusted cable strand entry sequence of the main saddle and the rotating saddle, the cable strand entering the saddle cantilever only one cable strand to the diaphragm 3, which greatly reduces the deformation of the diaphragm 3. The diaphragm 3 used in the step S2 is composed of three layers of toothed sub-diaphragms, and the height of the teeth of the sub-diaphragms is 2 or 3 times the thickness of the cable strands. The thickness of the sub-diaphragms is set to 10 mm; preferably, as Figure 6 As shown, the height of the teeth of the sub-spacer is three times the thickness of the cable strand.

[0059] However, after adjusting the order of cable strands entering the saddle, there is still a lateral force on one cable strand of the cantilever of the partition 3, and this lateral force will also cause deformation to the partition 3. In order to reduce the deformation caused by the lateral force on the partition 3, in step S2, the cable strands and partitions 3 are filled with square timbers to squeeze them before and after the cable strands are entered into the saddle. When saddle entry is required, a supporting and pulling tool is installed in advance in the saddle entry channel. The supporting and pulling tool presses the pressure rod 5 on the side wall of the partition 3. The pressure rod 5 is used to balance the lateral force of the cable strand, and then the square timber in the channel is removed. The pressure rod 5 is removed when the cable strand is entered into the saddle. After the current cable strand has been entered into the saddle, the pressure rod 5 is used to press onto the partition 3 to balance the lateral force of the cable strand and refill with square timber. Figure 7 and Figure 8 As shown, the support and pulling tool can be generally used for horizontal main cable saddles, horizontal rotation cable saddles and vertical main cable saddles; when used for horizontal main cable saddles and horizontal rotation cable saddles, the pressure rod 5 is used to press the partition 3 downward; when used for vertical main cable saddles, the pressure rod 5 is used to push the partition 3 in the direction of more cable strands (i.e. Figure 8 Press partition 3 to the right). Figure 7 and Figure 8 The middle shows the implementation method of inserting the 60# cable strand into the front support pulling tooling of the saddle.

[0060] like Figure 7 , Figure 8As shown, the supporting and pulling tooling includes a pressure rod 5, a first screw rod 8, a second screw rod 9 and a cylindrical base 10; a first nut 11 is fixed to one end of the base 10, and the first screw rod 8 is threaded through the first nut 11 and extends into the base 10; a top support 7 is welded and fixed to the other end of the first screw rod 8, and the top support 7 is a U-shaped groove for placing the pressure rod 5; a plurality of rod holes 6 are spaced apart on the pressure rod 5, one end of the second screw rod 9 passes through the rod hole 6 and is threadedly connected with a second nut 12, and the number of the second nuts 12 is 2, and the second nuts 12 are respectively pressed on both sides of the pressure rod 5; the other end of the second screw rod 9 passes through the pull rod through-hole of the saddle body and is locked and fixed by a third nut 13 arranged on both sides of the pressure rod 5 and outside the pull rod through-hole. That is, the two ends of the pressure rod 5 are supported by the pressure rod 5 and the partition 3 respectively, and the pressure rod 5 is counter-pressed by adjusting the second nut 12 and the third nut 13 to shorten the length of the second screw rod 9 in the slot; specifically, in this project, square steel with a specification of 50×40×5mm is used; the first screw rod 8 adopts a φ32 full screw rod, the base 10 adopts a φ48×3mm steel pipe, and the second screw rod 9 adopts a φ20mm full screw rod.

[0061] In addition, since the net spacing of 59 mm between the partitions 3 in this project is relatively small, the above-mentioned support and tensioning tooling cannot resist the vertical component of the cable strands due to the small cross-sectional size and limited rigidity of the pressure rod 5, thereby simultaneously affecting the cable strands from entering the saddle. Therefore, the present invention also adds two back-pressure devices to perform alternate back-pressure on the cable strands; the two back-pressure devices are 1# back-pressure device and 2# back-pressure device.

[0062] like Fig. 9 , Fig.10As shown, the back-pressure device includes a back-pressure beam 23 arranged just above the cable strand path, the back-pressure is welded and fixed on the column 20, the bottom of the column 20 is placed in the annular channel of the revolving saddle anchor of the suspension bridge, and the back of the column 20 is fixed by a supporting structure 22. Since the 1# back-pressure device and the 2# back-pressure device are arranged at different positions, the corresponding supporting structures 22 are slightly different; a plurality of back-pressure screw rods 25 are arranged through the back-pressure beam 23, and the back-pressure screw rods 25 are arranged on the back-pressure screw rods 25 through the first A locking piece 26 and a second locking piece 27 adjust the downward extension length of the back pressure screw 25. The first locking piece 26 and the second locking piece 27 are nuts. When used, the first locking piece 26 and the second locking piece 27 are respectively tightened on the top surface and the bottom surface of the back pressure beam 23 to fix the position of the back pressure screw 25. The lower end of the back pressure screw 25 is pressed against the top surface of each row of cable strands at the outlet end of the horizontal cable saddle, so that the elevation of the top surface of the cable strand is lower than the elevation of the bottom surface of the same layer of the partition 3 at the outlet end of the cable saddle, and the pressure on both sides of the partition 3 is balanced. Furthermore, a pad 28 (e.g., the pad 28 is a 600mm×60mm×60mm square wood) is arranged between the back pressure screw 25 and the cable strand steel wire to transitionally protect the steel wire and avoid hard contact. Specifically, a diagonal arm 24 is fixed between the column 20 and the back-pressure beam 23, and the column 20, the back-pressure beam 23, and the diagonal arm 24 are all made of a pair of I32a I-beams; the two I-beams of the column 20 and the back-pressure beam 23 are welded and fixed into a whole through a plurality of connecting pieces 21; the 1# back-pressure device is located 50 cm from the outlet end of the horizontal saddle, and the 2# back-pressure device is located 3 m from the maximum mileage of the first back-pressure device, and 3 m meets the minimum straight length of the cable strand after entering the saddle in this project.

[0063] Next, the steps of alternating back pressure of the back pressure device are described by taking the 58# to 65# cables in the above embodiment as an example of cables entering the horizontal rotation saddle:

[0064] 1. If Fig. 9 As shown, the 1# back-pressure device is set at 50 cm from the end of the horizontal turning cable saddle, and the back-pressure device is welded to the turning cable saddle limit block; the 2# back-pressure device is set at 3 m from the maximum mileage of the 1# back-pressure device, and is welded to the anchor body concrete embedded steel plate.

[0065] 2. All the cables that have been put into the saddle are back-pressed by the back-pressure screw rod 25. During the back-pressure, a 600×60×60mm square wood transition is set between the cable wire and the screw rod to protect the wire and avoid hard contact. The elevation of the two back-pressure devices of the same cable is measured by a level meter to ensure that the top surface of the cable at the 2# back-pressure device is lower than the top surface of the cable at the 1# back-pressure device before entering the next step of the construction of the new cable into the saddle.

[0066] 3. Reference Figures 2 to 3For example, if a new 60# cable strand needs to be inserted into the saddle, the back-pressure screw rod 25 above the 49#, 50#, and 51# cable strands needs to be loosened, and the back-pressure screw rod 25 is loosened by loosening the nut on the bottom surface of the back-pressure beam 23, and then the nut on the top surface of the back-pressure beam 23 is tightened to lift all the screw rods to reserve space for the 60# cable strand to enter. After the 60# cable strand is in place, the cross-section of the cable strand steel wire is shaped by tightening with square wood at the outlet of the rotating cable saddle, and then the cable strand is inserted under the screw rod of the 1# back-pressure beam 23. After the position of the 60# cable strand and the size of the steel wire are arranged, the nut on the top surface of the back-pressure beam 23 is loosened to lower the 60# back-pressure screw rod 25 and tighten the nut on the bottom surface of the back-pressure beam 23 to compress the cable strand. Check that the elevation of the top surface of the cable strand is lower than the elevation of the bottom surface of the partition 3 at the outlet of the rotating cable saddle, and then restore the back-pressure screw rod 25 above the 50# and 51# cable strands.

[0067] 4. Then, at the 2# counter-pressure device, loosen the top of the 49#, 50#, and 51# cables respectively. Similarly, loosen the nut on the bottom of the counter-pressure beam to loosen the counter-pressure screw rod. Then tighten the nut on the top of the counter-pressure beam to lift all the screw rods to reserve space for the 60# cable. After the 60# cable is in place under the screw rod of the 2# counter-pressure beam and the position and wire size of the 60# cable are arranged, loosen the nut on the top of the counter-pressure beam 23 to lower the 60# counter-pressure screw rod 25 and tighten the nut on the bottom of the counter-pressure beam 23 to tighten the cable strands. Check that the elevation of the top surface of the cable strand is lower than that of the top surface of the cable strand at the 1# counter-pressure device. Then restore the counter-pressure screw rod 25 on the top of the 50# and 51# cables.

[0068] 5. Repeat the above steps to carry out the saddle construction of the next cable strands 59#, 58#, and 57#.

[0069] 6. Before adjusting the cables erected during the day at night, the 2# back pressure device back pressure screw 25 needs to be loosened to keep all cables free. This is because the 1# back pressure device is 50cm away from the cable saddle outlet, and the 2# back pressure device is 3.5m away from the cable saddle outlet. Therefore, the 1# back pressure device does not affect the fine adjustment of the cables, while the 2# back pressure device affects the fine adjustment of the cables. Therefore, before fine adjustment at night, the cables back pressured by the 2# back pressure device need to be released.

[0070] The present invention also proposes a suspension bridge revolving cable horizontal rotation saddle installation construction device, which is applied to the aforementioned suspension bridge revolving cable horizontal rotation saddle installation construction method. The suspension bridge revolving main cable strand installation construction device includes the aforementioned back pressure device, supporting and pulling tooling and the partition 3 with a joint depth of 3 layers; the structures of these three have been described in the previous text and will not be repeated here.

[0071] In order to reduce the deformation of the partition 3 that may be caused by the cable strands entering the saddle, the present invention adopts four improvement methods:

[0072] Improvement 1: Adjust the order of cable strands entering the saddle. The cables of the horizontal main saddle and horizontal transfer saddle are arranged as follows: Figure 1 After the 45° inclined surface is grouped, the cables of each group are placed in the horizontal main cable saddle and the horizontal transfer cable saddle in the order of large-numbered cables → small-numbered cables; after all cables in the 45° inclined surface of the horizontal transfer cable saddle are placed in the tower top main cable saddle, the cables are placed in the saddle in the order of small to large cable numbers. In this way, the number of cantilever cables of the cables to the partition 3 in the horizontal cable saddle and the vertical main cable saddle is always 0 or 1.

[0073] Improvement 2: Adjust the joint depth of the partition 3. The conventional joint depth of one cable strand is adjusted to the joint depth of three cable strands with a deeper concave-convex depth, and the base of the partition 3 is firmly positioned and stabilized by the side drum force of the three cable strands; combined with Improvement 1, the order of cable strands entering the saddle is adjusted, which can greatly reduce the deformation of the partition 3.

[0074] Improvement 3: Add a support and pulling tool to counter-press / counter-pull the partition 3, so that the pressure rod 5 presses on the partition 3 to balance the side bulging force of the cable strand;

[0075] Improvement 4: The cable strands are alternately back-pressed by the 1# back-pressure device and the 2# back-pressure device double tooling, so that the cable strands with an empty cable line shape at the originally horizontal saddle are pressed down from an upward inclination to a position where the elevation of the top surface of the cable strand is lower than the elevation of the bottom surface of the saddle outlet partition 3.

[0076] By combining the four improvement methods, the deformation degree of the partition 3 can be greatly reduced, the construction quality can be guaranteed, and the construction efficiency can be improved.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A method for constructing a horizontal cable saddle for a suspension bridge, characterized in that: The following steps are involved: S1. Cable sequence design: The main cable strands are arranged asymmetrically in a 45° inclined plane. The 121 main cable strands are numbered 1# to 121# and arranged in 13×13. The cable strand rows are numbered from one row to thirteen rows, and the cable strand columns are numbered from one column to thirteen columns. The number of cable strands in one row to thirteen rows is 3, 7, 9, 11, 11, 13, 13, 13, 11, 11, 9, 7, 3, and the number of cable strands in one column to thirteen columns is 3, 7, 9, 11, 11, 13, 13, 13, 11, 11, 9, 7, 3. S2, rope into the saddle: The order of cable strands entering the saddle is: first the horizontal main cable saddle → then the horizontal rotation cable saddle → then the vertical main cable saddle at the top of the bridge tower → finally the loose cable saddle; when the cable strands enter the saddle, they exert a reverse pressure on the cable strands at the outlet end of the horizontal rotation cable saddle, so that the elevation of the top surface of the cable strands is lower than the elevation of the bottom surface of the partition (3) at the same level of the outlet of the horizontal rotation cable saddle; The saddle of 1#~121# cables includes the following steps: S21, 1#~4# cables are placed in the horizontal main cable saddle and horizontal transfer cable saddle in the order of cable with larger number → cable with smaller number; and after each cable is placed in the horizontal transfer cable saddle, the vertical main cable saddle is placed in sequence; S22. Cable strands 5# to 121# are grouped according to the 45° oblique surface in the cable strand sequence design, and the cables in the same group are placed in the horizontal main cable saddle and the horizontal transfer cable saddle in the order of large-numbered cables → small-numbered cables, ensuring that the maximum difference in the number of cables on both sides of the same partition (3) does not exceed 1; during the process of placing the horizontal transfer cable saddle, the vertical main cable saddle and the loose cable saddle are not formally placed; after all cables in the 45° oblique surface of the horizontal transfer cable saddle are placed, the vertical main cable saddle is placed in the order of small-numbered cables → large-numbered cables, ensuring that the maximum difference in the number of cables on both sides of the same partition (3) does not exceed 1.

2. The method for horizontally rotating cable saddles of a suspension bridge according to claim 1 is characterized in that: In step S22, the 5# to 121# cables are grouped into: the first group of 5# to 9# cables, the second group of 10# to 16# cables, the third group of 17# to 24# cables, the fourth group of 25# to 31# cables, the fifth group of 32# to 39# cables, the sixth group of 40# to 48# cables, the seventh group of 49# to 56# cables, the eighth group of 57# to 65# cables, the ninth group of 66# to 73# cables, the tenth group of 74# to 82# cables, the eleventh group of 83# to 90# cables, the twelfth group of 91# to 97# cables, the thirteenth group of 98# to 105# cables, the fourteenth group of 106# to 112# cables, the fifteenth group of 113# to 118# cables, and the sixteenth group of 119# to 121# cables.

3. The method for horizontally rotating cable saddles of a suspension bridge according to claim 2 is characterized in that: In step S22, the eighth group of 57#-65# cables are placed in the horizontal main cable saddle and the horizontal rotation cable saddle in the order of 65#→64#→63#→62#→61#→60#→59#→58#→57#; during the process of placing the horizontal rotation cable saddle, the vertical main cable saddle and the south anchor loose cable saddle are temporarily not placed, and multiple cables and / or fillers (4) of the 57#-65# cables are temporarily placed in two rows of grooves adjacent to the vertical main cable saddle so that the cables in the saddle grooves form an inclined 45° surface, and the remaining cables of the 57#-65# cables are temporarily placed in a temporary placement device provided on the vertical main cable saddle; after all cables in the inclined 45° surface of one layer of the horizontal rotation cable saddle are placed, the vertical main cable saddle is placed in the order of 57#→58#→59#→60#→61#→62#→63#→64#→65#.

4. The method for horizontally rotating cable saddles of a suspension bridge according to claim 1 is characterized in that: In step S2, square timber is filled in before and after the cable strands are inserted into the saddle for compaction; when it is necessary to insert the cable strands into the saddle, a support and tensioning tool is installed in advance in the channel for inserting the cable strands into the saddle, and the support and tensioning tool presses the pressure rod (5) on the side wall of the partition (3), and the pressure rod (5) is used to balance the side bulging force of the cable strands.

5. The method for horizontally rotating cable saddles of a suspension bridge according to claim 4 is characterized in that: The supporting and pulling tooling comprises a first screw rod (8) and a second screw rod (9) mounted on the pressure rod (5); the end of the first screw rod (8) away from the pressure rod (5) is threadedly fixed in the base (10); the end of the base (10) away from the pressure rod (5) is pressed against the inner wall of the saddle groove; the second screw rod (9) passes through the pull rod through hole of the saddle body and is locked and fixed by nuts arranged on both sides of the pressure rod (5) and on the outside of the pull rod through hole.

6. The method for horizontally rotating cable saddles of a suspension bridge according to claim 1 is characterized in that: The partition (3) used in step S2 is composed of three layers of toothed sub-partitions, and the height of the teeth of the sub-partitions is 2 or 3 times the thickness of the cable strands.

7. The method for horizontally rotating cable saddles of a suspension bridge according to claim 1 is characterized in that: In step S2, two back-pressure devices are used to alternately back-pressure the cable strands at the outlet end of the horizontal turning cable saddle; the 1# back-pressure device is located 50 cm from the outlet end of the horizontal turning cable saddle, and the 2# back-pressure device is located 3 m away from the first back-pressure device.

8. The method for constructing a suspension bridge revolving cable horizontally by saddle-saddle according to claim 7, characterized in that: After the cable strand enters the horizontal rotation saddle, two counter-pressure devices are used to counter-press the cable strand. The elevations of the two counter-pressure devices at the same cable strand are measured by a level meter to ensure that the top surface of the cable strand at the 2# counter-pressure device is lower than the top surface of the cable strand at the 1# counter-pressure device before proceeding to the next step of the new cable strand entering the saddle.

9. A suspension bridge revolving cable horizontal saddle installation construction device, applied to the suspension bridge revolving cable horizontal saddle installation construction method according to any one of claims 1 to 8, characterized in that: The invention comprises a back-pressure device, wherein the back-pressure device comprises a back-pressure beam (23) arranged just above the cable strand path, a plurality of back-pressure screw rods (25) are threadedly mounted on the back-pressure beam (23), and the lower ends of the back-pressure screw rods (25) are pressed against the top surface of each row of cable strands at the outlet end of the horizontal cable saddle, so that the elevation of the top surface of the cable strands is lower than the elevation of the bottom surface of the same-layer partition (3) at the outlet end of the cable saddle, thereby balancing the pressure on both sides of the partition (3).

10. The suspension bridge revolving cable horizontal revolving saddle installation construction device according to claim 9, characterized in that: A 600mm×60mm×60mm square wood transition protection steel wire is arranged between the back pressure screw rod (25) and the cable strand steel wire to avoid hard contact.

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