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Two-way pre-tensioned prestressed concrete track plate and production method thereof
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A production method and technology of track slabs, which are applied in the field of rail transit to achieve the effect of overcoming corrosion of steel bars and high durability
Active Publication Date: 2015-01-07
CHINA RAILWAY 23RD BUREAU GRP RAILTRANSIT ENG CO LTD +3
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Preferable use of fixed-length prestressed steel bars
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example 1
[0080] According to the principle of tension force, the rectangular tension pit structure is made into a semi-horizontal structure, that is, one part is on the ground and the other part is underground, so that the installation and operation of steel bars are easier and the occupied area is smaller.
[0081] Purchasing initial tensioning equipment and final tensioning equipment according to technical requirements
[0082] According to the technical requirements, the movable end tension steel beams are produced.
[0083] Purchase temperature control equipment according to technical requirements.
[0084] The specific production process is as follows:
[0085] Step 1. Put the prepared steel skeleton and prestressed steel bars into the model together, and test its insulation performance to be greater than 2 megohms;
[0086] Step 2, connect the prestressed steel bar with the connecting rod, and adjust the position of the connecting rod in the model before the initial tension;
[...
example 2
[0106] in accordance with figure 1 The principle is to make the rectangular tension pit structure into a fully horizontal structure, that is, the structures are all below the ground, so that the appearance is relatively neat, and the concrete pouring machine can be installed with a mobile distribution machine.
[0107] According to technical requirements, the steel beam at the movable end can be made into a push structure or a pull structure, and the rest of the process and specific precautions are the same as Example 1.
example 3
[0109] in accordance with figure 1 The principle is to make the rectangular tension pit structure into an all-steel structure, so that the tension structure can be relocated, which is convenient for repeated use. The rest of the process and specific precautions are the same as in Example 1 or Example 2.
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Abstract
The invention provides a production method of a matrix pit type two-way pre-tensioned prestressed concrete track plate. The pre-tensioned process is different from a traditional pre-tensioned method that prestressed reinforcements are required to be exposed in air to generate rust; fixed-length reinforcements are adopted, and are additionally provided with anchor plates at the ends, so that the prestressed reinforcements can be closed through a seal anchoring mode, and the structural durability of the track plate is improved. The track plate adopts a matrix pit type tensioned pit structure. The invention discloses key equipment for production, technical parameters of key technological tools and structural principles or technical requirements of the key equipment.
Description
technical field [0001] The invention relates to the technical field of rail transit, in particular to a bidirectional pretensioned prestressed concrete track slab and a production method thereof. Background technique [0002] At present, known production methods for high-speed rail track slabs include post-tensioning prestressed concrete track slab production methods and pre-tensioning prestressed concrete track slab production methods. [0003] The post-tensioning prestressed track slab production method is to place the track slab model in the workshop according to a certain distance, put the steel skeleton, install and position the unbonded prestressed steel rod on the model, pour concrete, steam curing, and demoulding Finally, the pre-installed prestressed steel rods are symmetrically tensioned. Typical representatives are CRTSⅠ and CSTRⅢ post-tensioning track slabs. [0004] The production method of the pre-tensioned prestressed track slab is to build a long-line tensi...
Claims
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IPC IPC(8): E01B1/00B28B23/12
CPCB28B23/12E01B1/002
Inventor 林晓波钱振地税桌平李兵选李军宋宗波张长春李其恒王玉策
Owner CHINA RAILWAY 23RD BUREAU GRP RAILTRANSIT ENG CO LTD
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