Assembly process of jq900a bridge erecting machine

Abstract

The invention discloses a JQ900A bridge erecting machine assembly technology and belongs to the technical field of bridge construction. The technology includes the following steps: assembling a load-carrying support; adjusting the height (on a girder transporting vehicle) of sleeves of the support; identifying drop point positions at the bottoms of girders and drop point positions on lugs of the support; hoisting the girder on one side, wherein the girder transporting vehicle enters from the rear side to drop down the girder; hoisting and dropping down the girder on the other side; retesting the girders; mounting flower stands and connection beams; mounting the upper column bodies of second columns, wherein sleepers at the bottom are stacked to perform supporting; mounting a jacklift; lifting the load-carrying support to the high level; mounting the column bodies of third columns; mounting the column bodies of first columns; mounting an electric appliance, a hydraulic system, a crawling ladder, railings and a walking board; mounting the lower column bodies of the second columns and performing debugging; performing type tests. Small-tonnage cranes are utilized, assembly of a JQ900A bridge erecting machine is achieved, while construction quality is ensured, assembly costs are reduced, and the assembly technology is simple and easy to perform.

Description

technical field

[0001] The invention relates to a bridge erecting machine assembly process, which belongs to the technical field of bridge construction. Background technique

[0002] Dedicated passenger line (high-speed railway) is the development direction of my country's railway construction and represents the development trend of China's railway technology. The prestressed concrete whole hole box girder has the advantages of high rigidity, good overall performance, fast construction speed, and easy quality assurance, so it has become the preferred bridge superstructure form for domestic high-speed railways and passenger dedicated lines.

[0003] At present, the domestic 900-ton box girder construction technology has been rapidly developed in recent years, but the domestic bridge erecting machine assembly construction technology has not been innovated. The technology currently used is that after the ground machine arm is assembled and formed, it is lifted to the carrying ...

Examples

Embodiment Construction

[0028] According to attached figure 1 It can be seen that the present invention specifically relates to a JQ900A bridge erecting machine assembly process, which belongs to the technical field of bridge construction.

[0029] The assembly process of JQ900A bridge erecting machine is as follows:

[0030] 1) According to the direction of the beam erection, first assemble the left and right main beams 8 and the supporting platform, and then install the carrying bracket 1 on the beam transporting vehicle and adjust the height through the bracket sleeve 2;

[0031] 2) Adjust the height of the support sleeve 2 so that the cross arm of the carrying support 1 is 2 meters away from the ground, that is, the lower position, and fix the support sleeve 2 with a pin;

[0032] 3) According to the structural shape and size of the main beam 8, mark the landing point position on the bottom surface of the main beam 8 and the bracket ear;

[0033] 4) Through the cooperation of two 70-ton cranes,...

technical field

[0001] The invention relates to a bridge erecting machine assembly process, which belongs to the technical field of bridge construction. Background technique

[0002] Dedicated passenger line (high-speed railway) is the development direction of my country's railway construction and represents the development trend of China's railway technology. The prestressed concrete whole hole box girder has the advantages of high rigidity, good overall performance, fast construction speed, and easy quality assurance, so it has become the preferred bridge superstructure form for domestic high-speed railways and passenger dedicated lines.

[0003] At present, the domestic 900-ton box girder construction technology has been rapidly developed in recent years, but the domestic bridge erecting machine assembly construction technology has not been innovated. The technology currently used is that after the ground machine arm is assembled and formed, it is lifted to the carrying ...

Examples

Embodiment Construction

[0028] According to attached figure 1 It can be seen that the present invention specifically relates to a JQ900A bridge erecting machine assembly process, which belongs to the technical field of bridge construction.

[0029] The assembly process of JQ900A bridge erecting machine is as follows:

[0030] 1) According to the direction of the beam erection, first assemble the left and right main beams 8 and the supporting platform, and then install the carrying bracket 1 on the beam transporting vehicle and adjust the height through the bracket sleeve 2;

[0031] 2) Adjust the height of the support sleeve 2 so that the cross arm of the carrying support 1 is 2 meters away from the ground, that is, the lower position, and fix the support sleeve 2 with a pin;

[0032] 3) According to the structural shape and size of the main beam 8, mark the landing point position on the bottom surface of the main beam 8 and the bracket ear;

[0033] 4) Through the cooperation of two 70-ton cranes,...

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