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Pre-tensioning method hollow plate whole steel core mold pulling-out device and method

A technology of hollow slab and pretensioning method, which is applied in the direction of unloading device, mold, ceramic forming core, etc., can solve the problems of long steel wire rope, adverse effect on construction safety, and reduce the work efficiency of steel inner mold, so as to save time, save length, The effect of increasing the demoulding speed

Active Publication Date: 2020-04-17
中交二航局第一工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this construction method, the longer the pedestal, the more prefabricated hollow slabs in a single groove, and the more times the steel wire rope needs to pass through the inner cavity of the hollow slab, which not only greatly reduces the efficiency of pulling out the steel inner mold, but also requires a long The length and diameter of the wire rope on the hoist are inversely proportional, that is, the longer the wire rope, the smaller the diameter of the wire rope, which will also have an adverse effect on construction safety.

Method used

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  • Pre-tensioning method hollow plate whole steel core mold pulling-out device and method
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  • Pre-tensioning method hollow plate whole steel core mold pulling-out device and method

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Experimental program
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Effect test

Embodiment 1

[0042] Such as Figure 1~5Among them, a pre-tensioned hollow slab integral steel mandrel pull-out device, which includes a foldable inner mold device 9, said inner mold device 9 is divided into left and right two mutually independent structures, including a foldable right inner The mold 91 and the left inner mold 92 are provided with a plurality of vertical supports 2 axially inside the right inner mold 91 and the left inner mold 92. The vertical supports 2 are foldable structures, and each vertical support 2 is connected by a pull rod. 5, the pull rod 5 is used to connect with the hoist 3 through the wire rope 4, so as to pull out the two mutually independent structures of the inner mold device 9 after being folded. With this structure, the operations of demoulding and pulling out the inner mold device 9 can be completed simultaneously during the pulling process, thereby greatly improving the construction efficiency.

[0043] The preferred solution is as Figure 2~5 Among t...

Embodiment 2

[0053] Such as Image 6 Among them, a construction method using the above-mentioned pre-tensioned hollow slab integral steel mandrel pull-out device comprises the following steps:

[0054] S1. After the pouring structural part 12 reaches a certain strength, remove the steel cross brace 11, demould the inner mold with the inclined surface at the end of each inner mold first, and connect the pull rod 5 of the vertical traction support 2 of the inner mold with the steel wire rope 4 , and drag the inner model out;

[0055] S2. In addition to the tail end away from the hoist 3, each inner cavity of the pouring structure 12 has at least one set of inner molds. If there is a group of inner molds, connect the pull rod 5 of the vertical traction support 2 of the first demoulding inner mold to the inner mold of the inner cavity of the previous pouring structure 12, and only one group of inner molds are connected to each other through connecting wire ropes 7 ;

[0056] Not connected a...

Embodiment 3

[0062] On the basis of embodiment 2, more specifically as Image 6 Among them, a construction method using the above-mentioned pre-tensioned hollow slab integral steel mandrel pull-out device comprises the following steps:

[0063] S01. After the pouring structural part 12 reaches a certain strength, the steel cross brace 11 is removed, and the vertical traction support of the left inner mold 92 of the first inner mold device 9 of the upper inner mold and the lower inner mold end slope is on the inner side. Pull bar 5 is connected with steel wire rope 4, and this first left inner mold 92 is dragged out;

[0064] S02, connect the pull rod 5 of the vertical traction support 2 of the right inner mold 91 of the first pole to the vertical traction support 2 of the left interior mold 92 of the second pole by connecting the steel wire rope 7, the vertical traction support 2 of the right inner mold 91 of the first pole The pull rod 5 is connected with the steel wire rope 4, and the r...

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Abstract

The invention provides a pre-tensioning method hollow plate whole steel core mold pulling-out device and method. The device comprises an inner mold device capable of being folded, the inner mold device can be divided into a left structure and a right structure which can be independent, the inner mold device comprises a right inner mold and a left inner mold which are folded, multiple vertical supports are arranged on the inner side of the right inner mold and the inner side of the left inner mold in the axial direction, the vertical supports are of a foldable structure, the vertical supports are connected through pull rods, the pull rods are used for being connected with winches through steel wire ropes, and two independent structures of the inner mold device are folded and then are pulledout. Inner molds of products are connected, dragging out construction of the inner mold device without steel wire rope penetrating is achieved, through the foldable inner mold device, in cooperationwith the vertical traction supports which can be automatically folded through traction, the inner mold device can be conveniently dragged out, and the mold stripping speed of the inner mold device canbe greatly improved.

Description

technical field [0001] The invention relates to demoulding construction of a pre-tensioned steel mandrel, in particular to a device and method for pulling out a pre-tensioned hollow slab integral steel mandrel. Background technique [0002] Pretensioned hollow slabs are usually prefabricated by medium and long-line pedestal method. Generally, the pedestal length is between 50 and 150m. Taking 16m as an example, a single slot can prefabricate 3-8 hollow slabs at the same time. For example, CN106013810B is a kind of pre-tensioning method prestressed tensioning construction method, and CN103255718B is a kind of pre-tensioned method slab girder track movable type steel beam overall tensioning device and tensioning process. The existing method for pulling out the steel inner mold is as follows: a single hoist is used to pull out the steel inner mold, that is, after the support constraints of the steel inner mold at both ends of the first hollow plate are released, the steel wire ...

Claims

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Application Information

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IPC IPC(8): B28B7/22B28B7/28B28B13/06
CPCB28B7/22B28B7/285B28B13/06
Inventor 胡艺红桂佳杨君龙韩自敬纪彬熊君单晓东
Owner 中交二航局第一工程有限公司