Construction skills of beam-pressing formwork for structural column of infilled wall in frame engineering

The infilled wall of frame engineering is a post-built wall. In order to ensure the integrity and seismic requirements of the infilled wall, the seismic code requires that the length of the external wall of the infilled wall should be more than 4m(7 degrees less than 5m), and structural columns should be added at the junction of the internal and external walls with a clear distance of 4m(7 degrees less than 5m) within the wall length. Filling the interior wall When the wall length is more than twice the height or more than 8m, the constructional column should be set within the length of the wall according to the height not more than twice the height and 8m, and it should be set at the intersection of vertical and horizontal walls or the edge of the hole first. When the height exceeds 4m, add a pressure beam in the middle of the wall. Hollow blocks (hollow bricks, ceramsite hollow blocks), aerated concrete blocks and other light materials are generally used in the infilled wall during construction. These hollow blocks are very bulky. When laying, it is not advisable to leave reinforcing holes for constructional columns or pressure beams on both sides of the constructional columns or under the pressure beams. After the infilled wall is laid, the formwork reinforcement is difficult because the formwork reinforcement holes are not reserved first. In the construction practice, the construction skills of filling the wall with bricks first and then drilling holes to strengthen the structural column or beam formwork are gradually explored. The specific construction method is as follows.

(1) Masonry shall build lightweight infilled walls as required, so as to ensure that the position and cross-sectional dimensions of constructional columns are accurate, the design of horse teeth is correct, and the verticality and flatness of walls meet the requirements.

(2) When the woodworking joist presses the beam template, it is generally necessary to complete 3~5 layers of masonry in the lightweight wall. D. After the masonry mortar reaches a certain strength, the shuttering carpenter shall measure the punching position on both sides of the constructional column or the filling wall at the bottom of the pressure beam according to the spacing requirements of the formwork support and reinforcement scheme, and mark it with chalk or red and blue pencils.

(3) The electric drill is equipped with a drill bit, the diameter of which is 16mm (about 500mm in length), and the holes marked on the wall are drilled and drilled through the lightweight infilled wall.

(4) After the constructional column template is installed, drill the opposite bolt on the light wall, put the butterfly card on the opposite bolt, and fix the steel pipe reinforcement template with a diameter of 48 mm ..

(5) After the steel bar binding of the pressure beam is completed, after checking that the diameter, specification, model, root number and spacing of the steel bar meet the requirements, insert a stepping fastening fixture into the borehole of the filler wall at the bottom of the pressure beam, and install a fixed template on the fixture.

(6) After the formwork is supported, the concrete pouring can be carried out only after the geometric dimensions and reinforcement of the formwork meet the requirements.

This method of drilling holes in the light wall, threading opposite bolts or gradually tightening fixtures to reinforce the formwork is an ideal construction method with less materials such as bolts or fixtures, firm formwork reinforcement, fast construction speed, almost no damage to the wall surface of the light wall, and convenient and fast construction.

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