阅读说明：本技术 一种跨越多股道运营线的铁路钢索塔施工方法 (Railway cable tower construction method for spanning multi-track operation line ) 是由 刘志锋 郭星亮 刘小青 张乃乐 员利军 陈锋 刘伟 刘志如 常乃超 祝慧娟 刘士 于 2021-05-24 设计创作，主要内容包括：本发明属于桥梁工程施工的技术领域,具体是一种跨越多股道运营线的铁路钢索塔施工方法。包括以下步骤,S100～支架搭设,首先安装设计要求施工基础,基础施工完成后,在基础上搭设若干组钢索塔拼装支架；S200～安装水平转体结构,将承台钢箱埋入下承台,在承台钢箱上依次安装水平转体球铰和索塔底部节段,索塔底部节段上部带有竖转球铰,索塔底部节段周边设置转盘钢箱；S300～索塔卧拼,以索塔底部节段为起点,依次拼装索塔,并焊接连接成整体；S400～竖转系统的安装；S500～竖转施工；S600～水平转体施工,在转盘钢箱上缠绕钢绞线,牵引钢铰线将索塔水平转体至设计位置；S700～进行合拢,利用钢板临时锁定索塔两端,利用天窗点进行索塔合龙施工。(The invention belongs to the technical field of bridge engineering construction, and particularly relates to a construction method of a railway cable tower spanning multiple railway operating lines. S100, erecting a support, namely, firstly installing a design requirement construction foundation, and after the foundation construction is finished, erecting a plurality of groups of steel cable tower splicing supports on the foundation; s200, installing a horizontal swivel structure, burying a bearing platform steel box into a lower bearing platform, sequentially installing a horizontal swivel spherical hinge and a cable tower bottom section on the bearing platform steel box, wherein the upper part of the cable tower bottom section is provided with a vertical swivel spherical hinge, and the periphery of the cable tower bottom section is provided with a turntable steel box; s300, horizontally splicing the cable towers, sequentially splicing the cable towers by taking sections at the bottoms of the cable towers as starting points, and welding the cable towers to form a whole; s400, mounting a vertical rotation system; s500, vertical rotation construction; s600, conducting horizontal rotation construction, winding steel strands on a turntable steel box, and drawing the steel strands to horizontally rotate the cable tower to a designed position; s700, folding, temporarily locking two ends of the cable tower by using steel plates, and performing cable tower closure construction by using skylight points.)

1. A railway wire rope tower construction method for spanning multi-track operation lines is characterized in that: comprises the following steps of (a) carrying out,

s100, erecting supports, namely, firstly installing a design requirement construction foundation (1), and after the foundation (1) is constructed, erecting a plurality of groups of steel cable tower assembly supports (2) on the foundation (1);

s200, installing a horizontal swivel structure, burying a bearing platform steel box (6) into a lower bearing platform (7), sequentially installing a horizontal swivel spherical hinge (8) and a cable tower bottom section (9) on the bearing platform steel box (6), wherein the upper part of the cable tower bottom section (9) is provided with a vertical swivel spherical hinge (10), and the periphery of the cable tower bottom section (9) is provided with a turntable steel box (11);

s300, horizontally splicing the cable towers, sequentially splicing the cable towers (12) by taking the cable tower bottom sections (9) as starting points, and welding the cable towers to form a whole;

s400, mounting a vertical rotation system;

s500, vertical rotation construction;

s600, conducting horizontal rotation construction, winding steel strands on a turntable steel box (11), and drawing the steel strands to horizontally rotate the cable tower to a designed position;

s700, folding, temporarily locking two ends of the cable tower by using a steel plate (30), and performing cable tower closure construction by using a skylight point.

2. A method of constructing a railway wire tower to span multiple haul lines as claimed in claim 1, wherein: in the step S400, the optimal pushing position of the cable tower (12) is determined according to stress analysis, a rotating node (13) is installed at the position, one end of a pushing rod (16) is hinged with the rotating node (13), the other end of the pushing rod is hinged with a sliding block (17), and the sliding block (17) is connected with a vertical rotation power device.

3. A method of constructing a railway wire tower to span multiple haul lines as claimed in claim 2, wherein: the vertical rotation power device comprises a vertical rotation dragging reaction frame (19) arranged on the turntable steel box (11), a continuous jack (20) is arranged on the vertical rotation dragging reaction frame (19), and the jack (20) is connected with the sliding block (17) through a steel hinge line (21).

4. A method of constructing a railway wire tower to span multiple haul lines as claimed in claim 2, wherein: the vertical rotation power device comprises a vertical rotation dragging reaction frame (19) arranged on a turntable steel box (11), a pushing jack (22) is arranged on a sliding block (17), one end of a steel strand (21) is fixed on the vertical rotation dragging reaction frame (19) on the turntable steel box (11), and the other end of the steel strand is connected with the pushing jack (22).

5. A method of constructing a railway wire tower to span multiple haul lines as claimed in claim 3 or claim 4, wherein: in the step S500, before vertical rotation, a balance weight (23) needs to be arranged in the top area of a turntable steel box (11), a dragging jack (20) or a pushing jack (22) is started to vertically rotate a cable tower (12), slow pushing or dragging is carried out after vertical rotation is about to reach the highest point, the vertical rotation position of the cable tower is monitored in real time by using a full-view-angle prism (24) installed at the top of the cable tower, after vertical rotation is carried out to the designed position, a sliding block is limited and fixed by using a horizontal limiting device, and vertical rotation hinge sealing is immediately carried out.

6. A method of constructing a railway wire tower to span multiple haul lines as claimed in claim 1, wherein: in the step S400, a vertical rotating steel tower frame (25) is arranged near the tower root of a turntable steel box (11), a jack (29) is arranged at the top of the vertical rotating steel tower frame (25), the jack (29) is fixedly connected with a cable tower (12) through a steel strand, a tension anchor beam (28) is arranged at the upper part of the vertical rotating steel tower frame (25), a fixed anchor beam (31) is arranged on a balance beam at the bottom of the turntable steel box (11), the tension anchor beam (28) is hinged with the vertical rotating steel tower frame (25), the fixed anchor beam (31) is hinged with the balance beam, steel strand wires between the tension anchor beam (28) and the fixed anchor beam (31) are arranged at the assembling side and the counterweight side of the cable tower, and the steel strand wires are synchronously pre-tensioned.

7. A method of constructing a railway wire tower to span multiple haul lines as in claim 6, wherein: in the step S500, a balance weight (23) is required to be arranged in the top area of the turntable steel box before vertical rotation, a jack (29) at the top of the steel tower frame is started, the steel cable tower is gradually pulled high, the jack is slowly tensioned after the vertical rotation is about to reach a designed position, the vertical rotation position of the cable tower is monitored in real time by using a full-view prism (24) at the top of the jacking cable tower, the jack is locked after the vertical rotation is about to reach the designed position, and finally, the vertical rotation hinge is sealed.

Technical Field

The invention belongs to the technical field of bridge engineering construction, and particularly relates to a construction method of a railway cable tower spanning multiple railway operating lines.

Background

In the bridge construction process, because the bridge spans deep valleys, rivers and existing lines, a swivel construction method is often needed, the bridge is rotated by the structure to be in place, hoisting equipment is not needed, the construction is safe and fast, and the problem that the site is limited in the construction process is effectively solved. At present, the main structure of the railway bridge turning construction is a main beam which mainly spans operating high-speed railways, passenger dedicated line railways, intercity railways and associated routes thereof, a motor train running line and other working conditions, and the turning construction method is mostly a horizontal turning method; in the construction of a steel pipe arch bridge, the height of a steel pipe arch is very high due to factors such as large span of a main girder and the like, if the construction is carried out by adopting an in-situ support assembly method, the height of the support is as high as 60 meters, on one hand, the stability and anti-inclination coefficient of the support are low, the construction safety risk is large, on the other hand, the consumption of steel pipes is large, the temporary measure cost is high, and at the moment, the construction method of the steel pipe arch rib is mainly a vertical rotation method; railway cable-stayed bridge cable towers generally adopt a concrete structure, a main tower is arranged on the side face of an existing line, when a line passes through a person gathering area, the narrow space does not meet the setting condition of the traditional cable-stayed bridge cable tower, the bridge tower needs to stretch over the existing line, at the moment, the cable-stayed bridge cable tower adopts a steel structure and an oval shape, and at the moment, if the construction of the arch tower structure is completed by adopting a single method, great manpower and material resources are required to be invested.

Disclosure of Invention

The invention provides a railway cable tower construction method for crossing a multi-strand operating line, aiming at solving the problems of avoiding high bracket arch height and high safety risk and reducing skylight point operation construction in the construction of an arch cable tower close to an existing line.

The invention adopts the following technical scheme: a railway cable tower construction method for spanning multiple track operation lines comprises the following steps of S100-support erection, firstly installing a design requirement construction foundation, and after the foundation construction is completed, erecting a plurality of groups of cable tower splicing supports on the foundation; s200, installing a horizontal swivel structure, burying a bearing platform steel box into a lower bearing platform, sequentially installing a horizontal swivel spherical hinge and a cable tower bottom section on the bearing platform steel box, wherein the upper part of the cable tower bottom section is provided with a vertical swivel spherical hinge, and the periphery of the cable tower bottom section is provided with a turntable steel box; s300, horizontally splicing the cable towers, sequentially splicing the cable towers by taking sections at the bottoms of the cable towers as starting points, and welding the cable towers to form a whole; s400, mounting a vertical rotation system; s500, vertical rotation construction; s600, conducting horizontal rotation construction, winding steel strands on a turntable steel box, and drawing the steel strands to horizontally rotate the cable tower to a designed position; s700, folding, temporarily locking two ends of the cable tower by using steel plates, and performing cable tower closure construction by using skylight points.

In step S400, the optimal pushing position of the cable tower is determined according to the stress analysis, a rotating node is installed at the position, one end of a pushing rod is hinged with the rotating node, the other end of the pushing rod is hinged with a sliding block, and the sliding block is connected with a vertical rotation power device.

The vertical rotation power device comprises a vertical rotation dragging counterforce frame arranged on the turntable steel box, a continuous jack is arranged on the vertical rotation dragging counterforce frame, and the jack is connected with the sliding block through a steel hinge line.

The vertical rotation power device comprises a vertical rotation dragging reaction frame arranged on the turntable steel box, a pushing jack is arranged on the sliding block, one end of the steel strand is fixed on the vertical rotation dragging reaction frame on the turntable steel box, and the other end of the steel strand is connected with the pushing jack.

In step S500, before vertical rotation, a counter weight needs to be arranged in the top area of the turntable steel box, a dragging jack or a pushing jack is started to vertically rotate the cable tower, slow pushing or dragging is performed after vertical rotation is about to reach the highest point, the vertical rotation position of the cable tower is monitored in real time by using a full-view prism installed at the top of the cable tower, after vertical rotation to a designed position, a horizontal limiting device is used for limiting and fixing the sliding block, and vertical rotation hinge sealing and hinging are immediately performed.

In another preferred case, in step S400, a vertical rotation steel tower is installed near the tower root of the turntable steel box, a jack is installed at the top of the vertical rotation steel tower, the jack is connected and fixed with the cable tower through a steel strand, a tension anchor beam is arranged at the upper part of the vertical rotation steel tower, a fixed anchor beam is arranged on the balance beam at the bottom of the turntable steel box, the tension anchor beam is hinged with the vertical rotation steel tower, the fixed anchor beam is hinged with the balance beam, steel hinge lines between the tension anchor beam and the fixed anchor beam are installed at the splicing side and the counterweight side of the cable tower, and the steel hinge lines are synchronously pre-tensioned.

In step S500, before vertical rotation, a counter weight needs to be arranged in the top area of the turntable steel box, a jack at the top of the steel tower frame is started, the steel cable tower is gradually pulled up, the jack is slowly tensioned after the vertical rotation is about to reach a designed position, the vertical rotation position of the cable tower is monitored in real time by using a full-view prism installed at the top of the cable tower, the jack is locked after the vertical rotation is reached to the designed position, and finally, the vertical rotation hinge is sealed and hinged.

Compared with the prior art, the invention does not need to build a vertical rotating cable tower of dozens of meters, reduces the use of large-scale hoisting equipment, and obviously improves the safety of construction close to the existing line; the construction process is novel, the vertical rotating body construction stress is clear, the working efficiency is greatly improved, the material for building the cable tower is saved, and better economic benefit is obtained.

Drawings

FIG. 1 is a schematic view of the installation of the foundation and the assembling bracket of the present invention;

FIG. 2 is a schematic view showing the installation of the pushing/vertical rotation system in embodiment 1;

FIG. 3 is a schematic view showing the installation of the drag vertical pivoting system in embodiment 1;

FIG. 4 is a schematic view showing the installation of the vertical pivoting system in embodiment 2;

FIG. 5 is a schematic view of the folding;

FIG. 6 is a schematic view of a slider installation;

FIG. 7 is a schematic view of a slide configuration;

FIG. 8 is a top view of the chute structure;

FIG. 9 is a schematic view of a slider structure;

FIG. 10 is a schematic view of a slide safety brake;

FIG. 11 is a top view of a slider carriage connection;

in the figure: 1-foundation, 2-assembly support, 3-upright column, 4-connection system, 5-adjusting block, 6-bearing platform steel box, 7-lower bearing platform, 8-horizontal swivel spherical hinge, 9-cable tower bottom section, 10-vertical swivel spherical hinge, 11-turntable steel box, 12-cable tower, 13-rotating node, 14-side plate, 15-rotating shaft, 16-push rod, 17-sliding block, 17.1-sliding track structure, 17.2-sliding block structure, 17.3-foundation layer, 17.4-filling layer, 17.5-track plate, 17.6-bolt I, 17.7-top plate, 17.8-bottom plate, 17.9-web plate, 17.10-transverse partition plate, 17.11-wear plate, 17.12-safety brake device, 17.13-pin shaft, 17.14-L-shaped steel plate, 17.15-compression spring structure, 17.16-supporting plate, 17.17-pin, 17.18-sliding frame connecting structure, 17.19-sliding frame connecting shaft, 17.20-anchoring structure supporting base plate, 17.21-bolt II, 18-limiting device, 19-reaction frame, 20-dragging jack, 21-steel hinge line, 22-pushing jack, 23-counterweight, 24-full-view prism, 25-vertical rotating steel tower, 26-steel upright post, 27-transverse connecting support, 28-anchoring beam, 29-jack, 30-closure temporary locking steel plate and 31-fixing anchoring beam.

Detailed Description

A construction method of a railway wire tower spanning multiple track service lines comprises the following steps.

S100, erecting supports, namely, firstly installing a design requirement construction foundation 1, and after the foundation 1 is constructed, erecting a plurality of groups of steel cable tower assembling supports 2 on the foundation 1;

s200, installing a horizontal swivel structure, burying a bearing platform steel box 6 into a lower bearing platform 7, sequentially installing a horizontal swivel spherical hinge 8 and a cable tower bottom section 9 on the bearing platform steel box 6, wherein the upper part of the cable tower bottom section 9 is provided with a vertical swivel spherical hinge 10, and the periphery of the cable tower bottom section 9 is provided with a turntable steel box 11;

s300, horizontally splicing the cable towers, sequentially splicing the cable towers 12 by taking the cable tower bottom sections 9 as starting points, and welding to form a whole;

s400, mounting a vertical rotation system;

s500, vertical rotation construction;

s600, conducting horizontal rotation construction, winding steel strands on the turntable steel box 11, and drawing the steel strands to horizontally rotate the cable tower to a designed position;

s700, folding, temporarily locking two ends of the cable tower by using the steel plates 30, and performing cable tower closure construction by using the skylight points.

In the embodiment 1, in step S400, the optimal pushing position of the cable tower 12 is determined according to the force analysis, the rotating node 13 is installed at the optimal pushing position, one end of the pushing rod 16 is hinged to the rotating node 13, the other end of the pushing rod is hinged to the sliding block 17, and the sliding block 17 is connected to the vertical rotation power device.

As shown in fig. 6-11, the slider 17 includes a slider structure 17.2 disposed on a slideway structure 17.1, the slideway structure 17.1 includes a base layer 17.3, a filling layer 17.4 and a track plate 17.5 sequentially disposed from bottom to top, a groove is reserved on the top of the base layer 17.3, the filling layer 17.4 is disposed in the groove, the track plate 17.5 is mounted on the filling layer 17.4, and the track plate 17.5 and the base layer 17.3 are connected into a whole through a bolt I17.6; the sliding block structure 17.2 comprises a top plate 17.7, a bottom plate 17.8, a web plate 17.9 and transverse partition plates 17.10, the web plate 17.9 and a plurality of transverse partition plates 17.10 are arranged between the top plate 17.7 and the bottom plate 17.8, a wear-resisting plate 17.11 is arranged at the bottom of the bottom plate 17.8, a sliding frame connecting structure 17.18 is arranged on the top plate 17.7 through a bolt II17.21, and a safety brake device 17.12 is arranged at the tail end of the sliding block structure 17.2.

The safety brake device 17.12 comprises an L-shaped steel plate 17.14, one end of the L-shaped steel plate 17.14 is hinged with a web 17.9 through a pin shaft 17.13, a pin 17.17 is fixed on the upper side of the other end of the L-shaped steel plate 17.14, the pin 17.17 penetrates through a support plate 17.16 fixed with the web 17.9, and a spring 17.15 is sleeved on the pin 17.17 on the upper side of the support plate 17.16.

The vertical rotation power device can select two modes of pushing and dragging.

The pushing mode is as follows: the vertical rotation power device comprises a vertical rotation dragging reaction frame 19 arranged on the turntable steel box 11, a continuous jack 20 is arranged on the vertical rotation dragging reaction frame 19, and the jack 20 is connected with the sliding block 17 through a steel hinge line 21.

A dragging mode: the vertical rotation power device comprises a vertical rotation dragging reaction frame 19 arranged on the turntable steel box 11, a pushing jack 22 is arranged on the sliding block 17, one end of a steel strand 21 is fixed on the vertical rotation dragging reaction frame 19 on the turntable steel box 11, and the other end of the steel strand is connected with the pushing jack 22.

In step S500, before vertical rotation, a counterweight 23 needs to be arranged in the top area of the turntable steel box 11, a dragging jack 20 or a pushing jack 22 is started to vertically rotate the cable tower 12, slow pushing or dragging is performed after vertical rotation is about to reach the highest point, the vertical rotation position of the cable tower is monitored in real time by using a full-view prism 24 installed at the top of the cable tower, after vertical rotation to a designed position, a horizontal limiting device is used for limiting and fixing a sliding block, and vertical rotation hinge sealing is immediately performed.

In embodiment 2, in step S400, a vertical rotation steel tower 25 is installed near the tower root of the turntable steel box 11, a jack 29 is installed on the top of the vertical rotation steel tower 25, the jack 29 is connected and fixed to the cable tower 12 through a steel strand, a tension anchor beam 28 is installed on the upper portion of the vertical rotation steel tower 25, a fixed anchor beam 31 is installed on the balance beam at the bottom of the turntable steel box 11, the tension anchor beam 28 is hinged to the vertical rotation steel tower 25, the fixed anchor beam 31 is hinged to the balance beam, steel strand wires between the tension anchor beam 28 and the fixed anchor beam 31 are installed on the splicing side and the counterweight side of the cable tower, and the steel strand wires are synchronously pre-tensioned.

In step S500, before vertical rotation, a counterweight 23 needs to be arranged in the top area of the turntable steel box, a jack 29 at the top of the steel tower frame is started, the steel cable tower is gradually pulled up, the jack is slowly tensioned after the vertical rotation is about to reach a designed position, the vertical rotation position of the cable tower is monitored in real time by using a full-view prism 24 installed at the top of the cable tower, the jack is locked after the vertical rotation is reached to the designed position, and finally, the vertical rotation hinge is sealed.