WO2013026302A1 - Framework corner positioning device and method - Google Patents

Abstract

A framework corner positioning device comprises a framework (5). Wailings (8, 10) are disposed outside the framework (5). A brace screw (2) is mounted at a corner of the framework (5). One end of the brace screw (2) is connected to the framework (5) through a gasket (6) and a nut (7), and the other end of the brace screw (2) is connected to a weldable sleeve (1) through threads. The weldable sleeve (1) is connected to rebar (9) through a brace (3) in a welding manner. A casing pipe (4) is disposed outside the brace screw (2). One end of the casing pipe (4) penetrates out of the framework (5), and the other end of the casing pipe (4) is close to the weldable sleeve (1). The brace (3) is made of common rebar, and the brace screw (2) is made of manganese steel with high strength. The weldable sleeve (1) is welded to the brace (3), and the weldable sleeve (1) is also connected to the brace screw (2), thereby satisfying the requirement for counter bracing reinforcement of the framework and the brace at the corner, and being applicable to various kinds of framework reinforcement construction in the case that the framework using the brace at the corner fails to achieve counter bracing.

Description

 Template corner positioning device and method Technical field

The invention relates to a device and a method for positioning a template corner in concrete pouring, in particular to a template corner positioning device and method.

Background technique

In the construction of the lift of the hydropower station, the design accuracy of the concrete of the tower column structure is particularly high, and the hydraulic self-lifting formwork is generally used for the vertical mold construction. Since the panel of the hydraulic self-lifting stencil is imported Finnish plate material, the price is expensive, and the overall stencil is heavy, and a brace hole for reinforcing the stencil is reserved on the panel. The strength is far from the requirement, so the set of templates is equipped with a special high-strength manganese steel pair of pull-tabs. This special type of strip can not be welded with ordinary steel bars, and its price is 6-8 times that of ordinary brace. In the hydraulic self-lifting formwork construction, because the opposite side of the outer template of the corner (or “T” type) is in the empty state (no template), the form of tie-bar reinforcement cannot be formed, resulting in the reinforcement and adjustment process of the template. It is difficult to meet the accuracy requirements.

Summary of the invention

The technical problem to be solved by the present invention is to provide a template corner positioning device and method, which can meet the needs of the tensioning (or "T" type) part template strip pulling reinforcement, and ensure the hydraulic pressure of the corner (or "T" type) portion. The reinforcement positioning of the self-lifting template meets the construction quality requirements.

In order to solve the above technical problem, the technical solution adopted by the present invention is: a template corner positioning device, which comprises a template and a cofferdam, and a pulling rod screw is installed at a position of a corner of the template, and one end of the pulling rod is passed through a gasket and a nut. The template is connected and the other end is screwed to the solderable sleeve;

The weldable sleeve is welded to the steel bar in the warehouse by a brace.

The sleeve of the pull rod is provided with a sleeve, one end of the sleeve passes through the template, and the other end is close to the weldable sleeve.

The sleeve and the solderable sleeve are also covered with a waterproof tape.

The plurality of brace bars are a plurality of strips, one end of the brace is welded on the main reinforcing bar in the bin, and the other end is welded to the weldable sleeve.

The pull rod screw is a manganese alloy steel double-head threaded rod.

A method of applying the apparatus described above, comprising the steps of:

First, the pull rod screw is horizontally penetrated into the transverse baffle and the corresponding reserved brace hole in the template and protrude into the bin, and then threadedly connected with the weldable sleeve in the bin;

2. Welding and connecting two strips to the weldable sleeve in the warehouse;

3. Adjust the weldable sleeve to the proper position and weld the other end of the brace on the main steel bars on both sides of the bin;

4. Preliminary positioning of the gasket and nut on the puller screw on the outside of the transverse cofferdam;

5. Use the measuring instrument to check the template and adjust the position of the template by the tightness of the nuts on all the strip screws to achieve the precision required by the design;

Through the above steps, the template corner positioning is realized.

The further optimized solution also includes the following steps:

After step three, a sleeve is inserted from the strip hole into the chamber from the outside of the transverse cofferdam, and the sleeve is sleeved on the rod screw until the sleeve is in close contact with the weldable sleeve, in the sleeve and the weldable sleeve The gap between the two is covered with a waterproof tape. When the concrete is poured, the puller screw removed by the tool can continue to be used for turnover.

The difficulty of the present invention is that since the overall weight of the template is heavy and the structure is complicated, it is difficult to ensure that the template is not deformed during the casting by the connection card in the corner (or "T" type), and the ordinary drawing screw can not be used. The tension of the template is easily deformed, and the cost of the template is high. Increasing the diameter of the pull rod screw will damage the reserved strip hole, causing damage to the template, and the special high-strength manganese steel can not be used for the pull-tab screw. The welding connection, and the cost of the pull rod screw is high, and the connection by welding can not continue to use. The invention overcomes the technical difficulties in the prior art and can meet the needs of the reinforcement of the corner (or "T" type) portion of the self-weighting template or other heavy weight template.

BRIEF abstract

The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

Figure 1 is a partial plan view of the overall structure of the present invention.

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1;

Implementation

As shown in FIG. 1 and FIG. 2, a template corner positioning device comprises a template 5, and a longitudinal cofferdam 10 and a transverse cofferdam 8 are arranged outside the template 5, and a pull rod screw 2 is installed at a corner of the template 5, and the pulling rod screw is installed. One end of 2 is connected to the template 5 through the gasket 6 and the nut 7, and the other end is connected to the weldable sleeve 1; the corner portion described here also includes The part where the pull bar is pulled cannot be realized in the "T" type part.

The weldable sleeve 1 is welded to the inner steel bar 9 by a brace 3 .

The weldable sleeve 1 is made of a weldable material having an outer diameter of 24 mm and a length of 12 to 15 cm, such as 45 gauge steel, and the weldable sleeve 1 is internally threaded with the puller screw 2.

A sleeve 4 is disposed outside the pull rod screw 2, and one end of the sleeve 4 passes through the template 5 and the transverse cofferdam 8, and the other end is adjacent to the weldable sleeve 1. The sleeve 4 is made of PVC and has an inner diameter of 18 mm.

The sleeve 4 and the solderable sleeve 1 are also covered with a waterproof tape. The coated waterproof tape can prevent the concrete from entering the sleeve 4, so that the pull rod screw 2 can be easily taken out after pouring.

The plurality of brace bars 3 are plural, one end of the brace 3 is welded to the main reinforcing bar in the bin, and the other end is welded to the weldable sleeve 1.

The drawbar screw 2 is a manganese alloy steel double-head threaded rod with a diameter of 15 mm.

First install the template (the first time to install, from the second position to take the hydraulic lifting method in place), after initial preparation, start to adjust and check the template position of the position according to the design requirements, and use the pull strip The screw 2 is tensioned and reinforced to achieve the function of the fixed template.

When pulling and reinforcing, the PVC sleeve 4 is first horizontally penetrated into the corresponding reserved strip holes on the inner and outer stencils, and then the strip screw 2 is inserted into the sleeve 4 and then worn on the outside of the stencil. The gasket 6 made of upper channel steel is initially tightened with a nut 7.

Finally, the template at the corner is reinforced with the apparatus of the present invention. Since the steel bars at the corners are very dense and the construction disturbance is large, the device of the present invention needs to be used as follows:

First, the pull rod screw 2 is horizontally penetrated into the corresponding retaining strip hole of the transverse cofferdam 8 and the template 5 and protrudes into the bin, the penetrating direction is perpendicular to the outer template face, and the piercing length exceeds the inner template. It is preferable to extend the line by about 15 cm to ensure that the elastic deformation of each of the stranded rods 2 is uniform, and the occurrence of excessive force of the single strip screw 2 is avoided. Then the threaded rod 2 and the weldable sleeve 1 are screwed in the chamber;

2. In the warehouse, two round steel bars 3 with a diameter of 16 mm are symmetrically welded to the weldable sleeve 1 in a horizontal direction. The two braces 3 after welding are in an "eight" shape, and the angle between the braces is usually It is suitable to use 120°, and it can also be determined according to the specific conditions of the steel bar arrangement in the warehouse;

3. Adjust the weldable sleeve 1 to the appropriate position, and firmly weld the other end of the brace 3 to the main reinforcing bars on both sides of the bin;

4. Install the gasket 6 and the nut 7 on the puller screw 2 on the outer side of the transverse cofferdam 8 to initially tighten and position;

5. Using the measuring instrument to check the template 5 and adjust the position of the template 5 through the tightness of the nut 7 on all the pulling rod screws to achieve the precision required by the design;

Through the above steps, the template corner positioning is realized.

The further optimized solution also includes the following steps:

After step three, a sleeve 4 is inserted from the strip hole into the chamber from the outside of the transverse coaming 8. The sleeve 4 is placed on the strip screw 2 until the sleeve 4 is in close contact with the weldable sleeve 1, in the sleeve The gap between the tube 4 and the weldable sleeve 1 is covered with a waterproof tape, and the optimized step is adopted. After the concrete is poured, the pull rod screw 2 removed by the tool can continue to be used for turnover.

Industrial applicability

The template corner positioning device and method provided by the invention are welded by the weldable sleeve and the ordinary steel bar, and the weldable sleeve is connected with the pull rod screw to meet the corner (or "T" type) part template. The need for tensioning and reinforcement of the pulling rod screw ensures that the reinforcement positioning of the hydraulic lifting frame at the corner (or "T" type) meets the construction quality requirements. It is very suitable for the various corner parts of the hydropower station shiplift project tower structure concrete strips can not form the formwork reinforcement construction under the tension condition. Especially for such a complex and heavy weight template suitable for hydraulic lifting.

Claims (7)

1. One The template corner positioning device comprises a template and a cofferdam, characterized in that: a pull rod screw (2) is installed at a corner of the template (5), and one end of the pull rod screw (2) passes through the gasket (6) and the nut ( 7) connected to the template (5), and the other end is screwed to the solderable sleeve (1);

   The weldable sleeve (1) is welded to the steel bar (9) in the warehouse by a brace (3).
2. The template corner positioning device according to claim 1, wherein the pull rod screw (2) is provided with a sleeve (4), and one end of the sleeve (4) passes through the template (5). The other end is close to the solderable sleeve (1).
3. A template corner positioning device according to claim 1, characterized in that the sleeve (4) and the solderable sleeve (1) are also covered with a waterproof tape.
4. The template corner positioning device according to claim 1, wherein the plurality of brace bars (3) are plurality, and one end of the brace (3) is welded on the main reinforcing bar in the bin, and the other end is Welding sleeve (1) is welded.
5. The template corner positioning device according to claim 1, wherein the pull rod screw (2) is a manganese alloy steel double-head threaded rod.
6. A method of applying the apparatus of any of claims 1-5, comprising the steps of:

   First, the pull rod screw (2) is horizontally penetrated into the corresponding retaining strip hole on the transverse cofferdam (8) and the template (5) and protruded into the bin, and then in the bin and the weldable sleeve ( 1) by threaded connection;

   2. Weld and connect the two braces (3) with the weldable sleeve (1) in the warehouse;

   3. Adjust the weldable sleeve (1) to the appropriate position and weld the other end of the brace (3) to the main reinforcing bars on both sides of the bin;

   4. Preliminary positioning of the gasket (6) and the nut (7) on the pull rod screw (2) on the outer side of the transverse cofferdam (8);

   5. Use the measuring instrument to check the template (5) and adjust the position of the template (5) by the tightness of the nut (7) on all the pulling rod screws to achieve the precision required by the design;

   Through the above steps, the template corner positioning is realized.
7. A method according to claim 6 further comprising the steps of:

   After step three, a sleeve (4) is inserted into the chamber from the strip hole outside the transverse cofferdam (8), and the sleeve (4) is placed over the strip screw (2) until the sleeve (4) Close the weldable sleeve (1), wrap the gap between the sleeve (4) and the weldable sleeve (1) with a waterproof tape. When the concrete is poured, use the tool to remove the pull rod screw (2) You can continue to use it for your turnaround.

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