Construction method of airship hauling pilot rope technology
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A construction method and technology of pilot ropes, applied to bridge parts, erection/assembly of bridges, bridges, etc., can solve problems such as high safety risks, closed waterways, high cost, etc., and achieve the goal of rich social resources, small site requirements, and low cost Effect
Active Publication Date: 2012-11-21
中交二公局第五工程有限公司
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Problems solved by technology
The construction of the pilot cable is mainly affected by factors such as bridge span, social resources, topography, shipping, weather, cost, and safety risks. At present, the construction of the pilot cable across the river mainly includes underwater traction, speedboat water surface traction, helicopter aerial traction, and artillery shell aerial traction. , manual dragging on land, etc. These methods have high safety risks and high costs, and they need to close the waterway during construction, which is inconvenient to implement
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Embodiment 1
[0030] Taking three bridge towers as an example, the two bridge towers are respectively bridge tower A, bridge tower B and bridge tower C.
[0031] The top of bridge tower A is equipped with hoists and cable racks wound with lightweight fiber ropes, the tops of bridge towers B and C are equipped with hoists and three-phase limit guide wheels, and the bottom anchorages of bridge towers A and C are respectively equipped with hoists. Each pylon is staffed with construction crews carrying walkie-talkies.
[0032] The light fiber rope is composed of 2mm Dyneema rope, 3mm Dyneema rope and 13mm Dyneema rope connected in sequence. The rope head is 2mm Dyneema rope, and the rope tail is 13mm Dyneema rope. The rope tail and the steel wire rope transition The rope and the tow rope are fixedly connected.
[0033] Each section of Dyneema rope is not less than the sum of the distances between towers A and B and between towers B and C.
[0034] Light airships are used, and the parameters o...
Embodiment 2
[0059] The equipment and construction process of this embodiment are basically the same as those of Embodiment 1, except for the single-span construction with only two bridge towers A and B.
[0060] The single-span construction process can be carried out in the following 5 steps:
[0061] Step 1, measure the wind direction and wind speed; use the anemometer and wind vane on the top of the bridge tower to determine the flight of the airship according to the measured wind speed;
[0062] Step 2, inserting flags; inserting flags at the airship take-off point, bridge tower A, bridge tower B and landing point respectively to clarify the flight path of the airship;
[0063] Step 3, pilot cable suspension; the airship operator controls the airship to take off from the take-off point. The rope head of the light fiber rope is fixedly connected with the tractor, that is, the 2mm Dyneema rope is fixedly connected with the tractor; the airship operator controls the airship to retract th...
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Abstract
The invention provides a construction method of an airship hauling pilot rope technology. A rope throwing hammer and a hauling device are arranged a light airship, a winch and a rope unwinding frame wound with a light fiber rope are arranged at the top of a bridge tower A, a winch and a three-phase limiting guide wheel are arranged at the top of a bridge tower B, winches are respectively arranged at the anchorage positions of the bottoms of the bridge tower A and the bridge tower B, and construction workers carrying interphones are allocated for the bridge towers. The construction method of the airship hauling pilot rope technology is characterized in that the light fiber rope is fixedly connected with a steel wire transition rope and a hauling rope, the light fiber rope is formed by sequentially connecting 2mm of Deenyma rope, 3mm of Deenyma rope and 13mm of Deenyma rope, and a connecting method comprises the steps of measuring wind direction and wind speed, placing a checkmark flag, hanging a pilot rope, hauling the pilot rope and displacing the pilot rope. The construction method has the advantages of being large in spanning capacity, quick in construction speed, free of influence on navigation, small in safety risk, low in cost and small in field requirement, is simple, convenient and flexible, requires few labors and devices and has wide popularization and application value.
Description
technical field [0001] The invention belongs to the technical field of suspension bridge construction, and relates to the construction technology of using an airship to pull a pilot cable across a river, in particular to the construction method of an airship pulling a pilot cable. Background technique [0002] With the continuous development of my country's national economic construction, especially the expansion of cities and the great development of the western economy, a new round of highway and railway construction climaxes have been set off, among which suspension bridges with large spans continue to emerge, which also gives bridge builders a proposal. higher requirements. [0003] The catwalk is the most important adjacent structure in the construction of the suspension bridge, and the lifeline of the entire upper structure construction, and the construction of the pilot cable is the first process of the construction of the catwalk, which is very important. The constru...
Claims
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