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Method for installing large-span front fulcrum guyed hanging baskets

An installation method and front fulcrum technology, which is applied in the field of large-span front fulcrum drag cable hanging basket installation, can solve problems such as potential safety hazards, uneven height of hanging points, and large force on local hanging points, so as to improve safety and reduce being The probability of wear and the effect of uniform force

Inactive Publication Date: 2019-07-12
联建建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, during the lifting process of the existing lanyard hanging basket, since it is operated by multiple sets of lifting devices, it is easy to have uneven heights of the lifting points, which will cause too much force on the local lifting points and bury potential safety hazards.

Method used

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  • Method for installing large-span front fulcrum guyed hanging baskets
  • Method for installing large-span front fulcrum guyed hanging baskets
  • Method for installing large-span front fulcrum guyed hanging baskets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1. Install the lifting device

[0043] 1) For the installation of the lifting system, first install the Bailey plate and the rear anchor rebar, and then install 8 sets of lifting devices, and the lifting devices are all controlled by the same power supply;

[0044] 2) Pay attention to the reinforcement of the lifting device on the Bailey sheet during the installation process. The double 45 I-beam in the lifting device is used as the distribution beam and the Bailey sheet to be reinforced with steel plates and bolts;

[0045] 3) Note that the jack and the reserved lifting hole are on the same vertical line to avoid abrasion of the steel strand during the lifting process.

[0046] Step 2. Install the steel strand and the working anchor at the anchor end of the hanging basket

[0047] 1) Install the equal-length and numbered steel strands that have been cut in advance from the top of the main beam;

[0048] 2) After the steel strand is installed in place, tighten th...

Embodiment 2

[0061] On the basis of embodiment one, the preparation method of the main girder of the present application comprises the following steps:

[0062] S1. Add 250Kg cement, 75Kg mineral powder, 60Kg fly ash, and 43Kg bentonite to the mixer, and add 1 / 3 of the total amount of water, that is, 67Kg water, and stir at a speed of 500rpm for 20 minutes;

[0063] S2. After the stirring is completed, add 60Kg of vermiculite gravel, 56Kg of sand and 2 / 5 of the total amount of water, that is, 80Kg of water, into the agitator, and stir at a speed of 300rpm, and the stirring time lasts for 30min;

[0064] S3. Add 56g of grinding wheel ash, 8g of composite water reducer, 3g of air-entraining agent, 3g of accelerator and the remaining water, that is, 53kg of water, into the mixer, and stir at a speed of 500rpm until the mixture is uniform to obtain the finished product concrete;

[0065] S4. Build the template according to the requirements of the main beam, and pour concrete into the template...

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Abstract

The invention discloses a method for installing large-span front fulcrum guyed hanging baskets, and relates to the field of bridge construction. The method mainly comprises the following steps that step 1, beret pieces and rear anchor threaded steel are firstly installed, then a plurality of sets of lifting devices are installed, wherein the lifting devices are connected with a same power supply;step 2, equal length steel strands and work anchors at the anchoring end under the hanging baskets are installed; step 3, all lifting points are maintained at the same height, and the hanging basketsare simultaneously lifted; and step 4, after the hanging baskets are lifted in place, force system conversion operation is carried out. By adopting the technical scheme, the steel strands first selected are of equal length, so that after the steel strands are installed with the lifting points, the height of the lifting points can be ensured to be equal during initial lifting. In addition, the samepower supply is used for controlling the lifting devices, and guarantee of the synchronization of the lifting devices is facilitated.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a method for installing a large-span front fulcrum guy cable hanging basket. Background technique [0002] The stay cable hanging basket uses the cable-stayed cable of the beam section to be poured as the front fulcrum of the hanging basket to provide supporting force, and the rear end of the hanging basket is anchored to the poured beam section. It is used for the cantilever cast-in-place prestressed concrete cable-stayed bridge and bears the weight of the beam body. And the construction load and the construction equipment that can move forward section by section. [0003] The installation of the dragline hanging basket is divided into two construction methods: the first one is the construction method of erecting a simple bracket at the installation position of the dragline hanging basket and assembling the dragline hanging basket in situ on the top of the bracket; the second ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/10C04B28/00
CPCC04B28/00C04B2201/50E01D21/10C04B18/12C04B18/08C04B14/104C04B14/202C04B14/06C04B18/0481C04B2103/302C04B24/34C04B24/20C04B22/148C04B22/0093C04B22/10
Inventor 吴伯喜何英黄伟张伟涛
Owner 联建建设工程有限公司
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