CN105586832A - Suspension type catwalk surface net mounting system - Google Patents

Abstract

The invention provides a suspension type catwalk surface net mounting system, which relates to the field of building equipment. The suspension type catwalk surface net mounting system comprises two winches, two towing devices, a plurality of catwalk bearing cables and a plurality of transverse passages, wherein the plurality of transverse passages are connected with the plurality of catwalk bearing cables in a sliding way above the plurality of catwalk bearing cables; one side of each transverse passage is connected with a plurality of transverse beams through catwalk surface nets; the plurality of transverse beams are arranged in parallel; the plurality of transverse beams are connected with the plurality of catwalk bearing cables in a sliding way; the catwalk surface nets are connected with the plurality of catwalk bearing cables in a sliding way; a crane load inspection bag is suspended under each transverse beam; the two towing devices are used for reversely pulling the plurality of transverse passages; and the two winches are connected with the plurality of transverse passages through steel wire ropes. Through adoption of the suspension type catwalk surface net mounting system provided by the invention, technical problems of long working hours, high cost and low efficiency during laying the catwalk surface nets in the prior art are solved.

Description

Suspended Catwalk Mesh Installation System

technical field

The invention relates to the field of construction equipment, in particular to a hanging catwalk surface net installation system.

Background technique

Suspension bridge, also known as suspension bridge, refers to a bridge with cables (or steel chains) suspended through towers and anchored on both banks (or both ends of the bridge) as the main load-bearing member of the upper structure. Its cable geometry is determined by the balance of forces and is generally close to a parabola. Many suspenders hang from the cables to hang the bridge deck. Stiffening beams are often set between the bridge deck and the suspenders to form a combined system with the cables to reduce the deflection deformation caused by the live load.

Suspension bridges are mainly composed of suspension cables, cable towers, anchorages, suspenders, bridge deck systems and other parts. The main load-bearing component of the suspension bridge is the suspension cable, which mainly bears the tensile force, and is generally made of steel with high tensile strength (steel wire, steel cable, etc.). Generally, a cable is set on both sides of the bridge, and the two ends are fixed on the anchors on the bank. The two main cables bear the weight, and two towering cable towers are set on the river surface at a certain distance to support the main cable. . The distance between the two cable towers is generally called the main span, and the distance between the two cable towers and the shore is generally called the side span.

The catwalk is a linear temporary construction access road that is erected under the main cable and parallel to the main cable during the construction of the suspension bridge. It is a high-altitude scaffold for construction workers to carry out construction work, and a construction platform for the main cable system and even the entire upper structure of the suspension bridge. On it, construction personnel complete important tasks such as cable strand traction, strand adjustment, saddle shaping, cable tightening, cable clamp and sling installation, box girder hoisting and site connection, main cable winding, protective coating and other important tasks. There is one upstream and one downstream, and the cross-section is usually U-shaped, long and narrow with some wobbling, so it is called "catway", and the English is catway. It is an extremely important temporary facility in the construction of the suspension bridge and will be demolished after the bridge is completed.

The catwalk system is generally composed of load-bearing cables (including cable end length adjustment devices), surface layers, railings and handrails, transverse passages, and wind resistance systems.

The load-bearing cable is the main force-bearing member of the catwalk structure, and it is usually made of twisted steel wire rope. According to construction requirements and foreign design and construction experience, it is generally set that the centerline of the load-bearing cable after the catwalk is formed is about 1.5m lower than the centerline of the main cable erection. In the selection of this distance, in addition to fully considering the convenience of the construction personnel during the erection of the main cable, more importantly, the traction of the strands, the tightening of the main cable and the use of special machinery (such as: cable tightening machine, Winding machine) operating space requirements.

The catwalk surface layer includes a steel mesh structure, which is divided into upper and lower layers, one thick and one thin, and becomes the catwalk surface mesh. The layout of the catwalk surface should not only have a structural structure that is convenient for safe operation, but also should be considered to meet the overall rigidity of the catwalk when selecting materials. For the requirements of the working space, the design width of the catwalk is generally about 4.0m. At the same time, the centerline of the catwalk is designed to be vertically consistent with the centerline of the main cable, so that after a series of operations such as forming the main cable and loosening the load-bearing cables of the catwalk, it is easy to maintain balance when hanging the catwalk on the main cable.

The catwalk is equipped with railing posts every few meters, and a handrail cable and one or two protective cables are installed on each side of the railing in the full length range. The handrail cable is mainly used as a handrail for workers to walk, and the protective cable is mainly used to fix the side protection net. For safety. The side protective net adopts a large eye wire mesh with a height of about 1.0m.

The horizontal channel of the catwalk can meet the catwalk connection between the upstream and downstream, facilitate the transfer of construction personnel, equipment and materials, improve the overall stability of the catwalk itself, enhance its wind resistance, and be perpendicular to the main cable. In order to reduce the dead load mass, the horizontal overpass is considered to adopt a steel pipe or square steel truss structure, and the structural strength check calculation should be carried out. The surface layer and railing protection of the transverse passage can be arranged in the same way as the surface layer of the catwalk.

The wind resistance system of the catwalk, because the construction of the main cable is a high-altitude operation, and the construction of cross-sea bridges in strong wind areas is increasing, the impact of wind has become particularly prominent. In order to ensure the catwalk's wind resistance stability, sufficient rigidity and alignment adjustment during construction, a wind-resistant cable system and a horizontal overpass) are usually installed under the catwalk. If the wind-resistant cables cannot be installed due to various reasons, the density of the horizontal overpass can be increased or other measures can be used to enhance the stability and rigidity of the catwalk. The overall stiffness and stability of the catwalk are related to the span of the load-bearing cables, the pretension of the wind-resistant cables and the quality of the catwalk. Although the catwalk is a temporary structure during the construction process, it may also be attacked by strong winds and typhoons during use. In order to ensure the safety of the catwalk during use and verify the wind resistance of the catwalk, the catwalk structure of the general suspension bridge should also be subjected to wind tunnel tests and wind stability analysis and calculation. In addition, lighting and warning equipment should be installed on the catwalk, which should be arranged by the construction unit according to the needs of use and navigation.

In the prior art, the construction of catwalks generally adopts manual laying. The construction personnel step on the load-bearing cables of catwalks to lay catwalk surface nets and railing columns one by one. Working at high altitudes is very dangerous, and the laying efficiency is low. The time is long and the laying cost is high.

Based on this, the present invention provides a suspended catwalk surface net installation system to solve the above technical problems.

Contents of the invention

The purpose of the present invention is to provide a suspended catwalk surface net installation system to solve the technical problems of long man-hours, high cost and low efficiency in laying the catwalk surface in the prior art.

In an embodiment of the present invention, a suspended catwalk surface net installation system is provided, and the suspended catwalk surface net installation system includes two hoists, two pullers, multiple catwalk load-bearing cables and multiple horizontal channel;

The multiple catwalk load-bearing cables are placed in parallel with the main cable of the suspension bridge; the multiple catwalk load-bearing cables are located on the same plane;

A plurality of said transverse passages are slidingly connected with said plurality of catwalk load-bearing cables; above said plurality of catwalk load-bearing cables, one side of each said transverse passage is connected with a plurality of crossbeams through a catwalk surface net, and a plurality of The crossbeams are arranged in parallel and parallel to the transverse channel; multiple crossbeams are slidably connected to the multiple catwalk load-bearing cables, and the catwalk surface net is slidably connected to the multiple catwalk load-bearing cables;

A crane load inspection bag is hung below each beam;

The two pullers are respectively located at the top of the two cable towers of the suspension bridge, and are used to reversely pull a plurality of the transverse passages;

The two hoists are respectively located at the top of the two cable towers of the suspension bridge, and are connected to multiple transverse passages through steel wire ropes.

Optionally, pulleys are provided under each of the transverse passages and each of the beams.

Optionally, the plurality of beams and the catwalk surface net are clamped to the plurality of catwalk load-bearing cables through U-shaped bolts respectively.

Optionally, cotter pins are inserted into the pin spaces outside the nuts of the U-shaped bolts.

Optionally, the multiple beams are all made of section steel.

Optionally, the crane load inspection bag is a water bag or a sandbag.

Optionally, the crane load inspection bag has a volume of 3-4m3.

Optionally, the transverse channel is a steel pipe or square rigid truss structure.

Optionally, the multiple catwalk load-bearing cables are made of steel.

Optionally, the number of the multiple catwalk load-bearing cables is set to 8.

The suspended catwalk surface net installation system provided by the present invention, when laying, first design the position to fix the two ends of a plurality of catwalk load-bearing cables on both banks, and fix the middle part on the top of the cable tower.

Firstly, on the ground, bind the various materials that make up the surface of the catwalk, such as non-slip wooden strips, surface mesh, angle steel, etc., according to the designed position, and use the tower crane to lift the surface to the temporary storage platform for the surface on the working platform on the top of the tower on the shelf. Then hoist the required beams etc. onto the working platform where the displacement pull-down system is installed on the face side. Assemble a plurality of the above-mentioned transverse channels on both sides of the bank, lift them up by the tower crane of the main tower, and lift them to the top of the two cable towers respectively, and then install them together with a plurality of catwalk load-bearing cables, and then pass a plurality of crossbeams through the catwalk surface net Connect together, hang the crane load inspection bag under the multiple beams as a counterweight, and then connect multiple beams and catwalk surface nets with multiple catwalk load-bearing cables. Under the weight of the transverse channel, the crane load inspection bag, and the plurality of beams, the slide begins. During the construction process, the horizontal channel can be simultaneously descended to both sides of the two cable towers. Due to the steep slope on both sides of the cable tower top, the surface net can slide down by its own weight. In order to prevent the surface net from falling too fast, a winch is installed on the top of the cable tower to control the sliding speed, and the steel ropes of the reverse pull hoist are connected in turn. On the surface mesh beams. The first two horizontal passages and surface nets in the midspan slide down to a gentle slope. When the self-weight cannot slide down, use the puller to pull the rope head to pull the horizontal passages, so that the two horizontal passages in the midspan are closed. Then slide down the horizontal channel one by one, and finally connect all the catwalk surface nets connected with the horizontal channel to form a connected channel, and then fix them one by one. After the lateral channel of the side span is slid down into place, the surface netting is manually laid piece by piece from the anchorage to connect with the transverse channel. When the catwalk surface net is laid down, the upper railing and the side net can be assembled at the same time, and turned inward on the surface net, slide down together with the surface net, and then erected and fixed on the surface net.

The suspended catwalk surface net installation system of the present application no longer needs to manually lay catwalk surface nets piece by piece, by adding beams that can slide relative to the catwalk load-bearing cables, and increasing the counterweight, the transverse passage is also set as Can slide. The catwalk surface net is driven to slide by its own weight until the entire catwalk is covered with load-bearing cables, which consumes less time, is more efficient, and lowers the laying cost.

Based on this, compared with the prior art, the present invention has the advantages of short consumption time, high efficiency and low laying cost.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is the structural representation of embodiment one;

Fig. 2 is a top view of Embodiment 1;

Fig. 3 is a front view of the transverse channel;

Figure 4 is a schematic diagram of the connection between the beam and the catwalk surface net.

Reference signs:

1- catwalk load-bearing cable; 2- horizontal passage; 3- catwalk surface net;

4- beam; 5- tower.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be mechanical connection or electric welding connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Embodiment one

As shown in Figures 1-4, a suspended catwalk surface net installation system is provided in this embodiment, and the suspended catway surface net installation system includes two hoists, two pullers, multiple catwalk A load-bearing cable 1 and a plurality of transverse passages 2;

The multiple catwalk load-bearing cables 1 are placed in parallel with the main cable of the suspension bridge; the multiple catwalk load-bearing cables 1 are located on the same plane;

A plurality of said transverse channels 2 are slidably connected with said plurality of catwalk load-bearing cables 1; above said plurality of catwalk load-bearing cables 1, one side of each said transverse channel 2 is connected to multiple catwalk surface nets 3 A crossbeam 4, a plurality of crossbeams 4 are arranged in parallel, and are parallel to the transverse channel 2; a plurality of crossbeams 4 are slidably connected with the plurality of catwalk load-bearing cables 1, and the catwalk surface net 3 is connected to the The multiple catwalk load-bearing cables 1 are slidingly connected;

A crane load inspection bag is suspended below each beam 4;

The two pullers are respectively located at the top of the two cable towers 5 of the suspension bridge, and are used to reversely pull a plurality of the transverse passages 2;

The two winches are respectively located at the tops of the two cable towers 5 of the suspension bridge, and are connected to a plurality of the transverse passages 2 by wire ropes.

The installation device of the suspended catwalk surface net 4 provided by the present invention, when laying, first design the position to fix the two ends of a plurality of catwalk load-bearing cables 1 on both sides, and the middle part is fixed on the cable tower top.

Firstly, on the ground, bind the various materials that make up the surface of the catwalk, such as non-slip wooden strips, surface mesh, angle steel, etc., according to the designed position, and use the tower crane to lift the surface to the temporary storage platform for the surface on the working platform on the top of the tower on the shelf. Then the required beams 4 etc. are hoisted onto the installation work platform on the face side of the displacement pull-down system. A plurality of said transverse passages 2 are assembled on both banks, lifted by the tower crane of the main tower, respectively lifted to the tops of the two cable towers 5, and then installed together with a plurality of catwalk load-bearing cables 1, and then a plurality of beams 4 are passed through The catwalk surface net 3 is connected together, and the load inspection bag of the crane is hung on the bottom of the plurality of crossbeams 4 as a counterweight, and then the plurality of crossbeams 4 and the catwalk surface net 3 are connected with a plurality of catwalk load-bearing cables 1 . Under the gravity of the transverse channel 2, the load inspection bag of the crane, and a plurality of beams 4, it begins to slide down. During the construction process, the transverse channel 2 can be slid down to both sides of the two cable towers 5 at the same time. Due to the steep slope on both sides of the top of the tower, the surface net can slide down by its own weight. In order to prevent the surface net from falling too fast, a hoist is installed on the tower top gantry to control the speed of the slide. The steel ropes of the reverse hoist are connected to the surface in turn Lay net beam 4 on. The two transverse passages 2 that slide down first in the midspan and the surface net slide down to a gentle slope. When the self-weight cannot slide down, use the puller to pull the rope to pull the transverse passage 2, so that the two transverse passages in the midspan 2 close. Then slide down the transverse channel 2 one by one, and finally connect all the catwalk surface nets 3 connected with the transverse channel 2 to form a connected channel, and then fix them one by one. After the lateral channel 2 of the side span slides into place, the surface netting is manually laid up piece by piece from the anchorage to connect with the lateral channel 2. When paving, the bottom net is first followed by the side net until the entire side span catwalk is paved. When the catwalk surface net 3 slides and lays, the upper railing and the side net can be assembled at the same time, and turned inward on the surface net, slide down together with the surface net, then erect and fix on the surface net.

The installation device of the suspended catwalk surface net 3 of the present application no longer needs to manually lay the catwalk surface net 3 one by one. Channel 2 is also set to slide. The catwalk surface net 3 is driven to slide by its own weight until the entire catwalk load-bearing cable 1 is covered, the time consumption is short, the efficiency is high, and the laying cost is low.

Based on this, compared with the prior art, the present invention has the advantages of short consumption time, high efficiency and low laying cost.

As shown in the figure..., in the optional solution of this embodiment, pulleys are arranged under each of the transverse passages 2 and each of the beams 4 .

The transverse channel 2 is slidably connected with the crossbeam 4 and the catwalk load-bearing cable 1 through a pulley, which has low cost, simple device and convenient use.

In an optional solution of this embodiment, the plurality of crossbeams 4 and the catwalk surface net 3 are clamped to the plurality of catwalk load-bearing cables 1 through U-shaped bolts, respectively.

U-shaped bolts, that is, saddle bolts, are non-standard parts. They are U-shaped, so they are also called U-shaped bolts. There are threads at both ends that can be combined with nuts. They are mainly used to fix tubular objects such as water pipes or sheet objects such as automobile leaf springs. , because the way of fixing objects is like a person riding on a horse, so it is called a riding bolt. Use U-shaped bolts to clamp the catwalk surface net 3 and the beam 4 on the catwalk load-bearing cable 1. The bolts should not be too tight to ensure that the surface layer can slide freely on the load-bearing cable.

Further, cotter pins are inserted into the pin holes outside the nuts of the U-shaped bolts.

Insert a cotter pin into the pin hole outside the nut of the U-shaped bolt to prevent the nut from falling off during the sliding process of the surface layer

Further, the multiple beams 4 are all made of section steel.

Sectional steel is a bar-shaped steel with a certain cross-sectional shape and size. High strength, easy processing, and standard parts.

Further, the crane load inspection bag adopts a water bag or a sandbag.

Water bags or sandbags are easy to obtain materials, convenient to use, and save time.

Further, the volume of the crane load inspection bag is 3-4m ³ .

Overweight crane load inspection bags slide too fast and are difficult to control.

In an optional solution of this embodiment, the transverse channel 2 is a steel pipe or a square rigid truss structure.

Using the existing truss structure, the technology is mature and the cost is low.

In an optional solution of this embodiment, the multiple catwalk load-bearing cables 1 are made of steel.

The steel material has strong load-bearing capacity and can carry enough weight.

Further, the number of the multiple catwalk load-bearing cables 1 is set to 8.

Set 8 catwalk load-bearing cables 1 to ensure its bearing capacity and provide sufficient support.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. a suspension type cat road veil installation system, is characterized in that, comprises two elevatorsMachine, two pull device, Duo Tiaomao road track cable and many interconnections;

The main push-towing rope arranged parallel of described Duo Tiaomao road track cable and suspension bridge; Described Duo Tiaomao roadTrack cable in the same plane;

Many described interconnections and described Duo Tiaomao road track cable are slidably connected; Described manyTrack cable top, Tiao Mao road, a side of every described interconnection connects many by cat road veilBar crossbeam, many described crossbeam parallel arranged, and parallel with described interconnection; Many institutesState crossbeam and described Duo Tiaomao road track cable is slidably connected, described cat road veil and described manyCat road track cable is slidably connected;

Every described crossbeam below is hung with loop wheel machine load-checking bag;

Described in two, pull two Sarasota tops that device lays respectively at suspension bridge, for oppositely pullingMany described interconnections;

Two described hoist engines lay respectively at two Sarasotas tops of suspension bridge, by steel wire rope withMany described interconnection connects.

2. suspension type cat according to claim 1 road veil installation system, its feature existsIn, every described interconnection and every described crossbeam below all arrange pulley.

3. suspension type cat according to claim 1 road veil installation system, its feature existsIn, many described crossbeams and described cat road veil are respectively by U-bolt and described many catsRoad track cable clamping.

4. suspension type cat according to claim 3 road veil installation system, its feature existsIn, the pin sky in the nut outside of described U-bolt is fitted with split pin.

5. suspension type cat according to claim 3 road veil installation system, its feature existsIn, many described crossbeams all adopt shaped steel to make.

6. suspension type cat according to claim 5 road veil installation system, its feature existsIn, described loop wheel machine load-checking bag adopts water bag or sandbag.

7. want 6 arbitrary described suspension type cat road veil installation systems, its feature according to rightBe, the volume of described loop wheel machine load-checking bag is 3-4m³。

8. want 1 arbitrary described suspension type cat road veil installation system, its feature according to rightBe, described interconnection is the truss structure of steel pipe or Fang Gang.

9. according to the suspension type cat road veil installation system described in claim 1-8 any one,It is characterized in that the employing steel material of described Duo Tiaomao road track cable.

10. suspension type cat according to claim 9 road veil installation system, its featureBe, the quantity of described Duo Tiaomao road track cable is set to 8.