CN206438769U - It is a kind of to prevent that cast-in-situ concrete beam bottom from rising the structure of mould - Google Patents

Abstract

The utility model relates to the field of building construction, in particular to an anti-expansion formwork structure for cast-in-situ concrete beams. A structure to prevent the expansion of the cast-in-place concrete beam bottom mold is proposed, including the beam bottom formwork and the beam side formwork. The keel and the beam side vertical keel are fixed, and fastened with pull bolts or fine-tuning screws. The junction of the beam bottom formwork and the beam side formwork forms an external angle, and the gap between the beam side transverse keel and the beam side vertical keel at the external angle There is a wooden wedge in the inner wedge, and the wooden wedge and the side keel of the beam are fixed with nails. The utility model has simple structure, can improve work efficiency, avoids material waste and labor consumption caused by beam bottom formwork expansion or grout leakage in traditional technology, improves the efficiency of concrete beam construction, and ensures construction quality.

Description

A structure to prevent mold expansion at the bottom of cast-in-place concrete beams

technical field

The utility model relates to the field of building construction, in particular to an anti-expansion formwork structure for cast-in-situ concrete beams.

Background technique

With the rapid development of my country's economy and the acceleration of urbanization, concrete buildings are becoming more and more common in urban buildings. Concrete formwork structure construction technology, as one of the important technologies in concrete structure construction, has been paid more and more attention by people. In the construction of existing cast-in-place concrete beams, the side formwork of the beam is fastened and fixed by tension bolts or fine-tuning screw rods, which cannot fully ensure that the joints between the bottom formwork and the side formwork do not leak grout or expand the formwork. Quality problems such as grout leakage and mold expansion of cast-in-place concrete beams not only make the concrete structure poor in appearance after formwork removal, but also seriously affect the overall progress of the project and waste a lot of construction resources.

Contents of the invention

The purpose of this utility model is to overcome many deficiencies in the traditional technology and provide a structure that prevents the expansion of the mold at the bottom of the cast-in-place concrete beam. , is worth promoting.

The technical scheme adopted by the utility model to achieve the above purpose is: a structure for preventing the expansion of the cast-in-place concrete beam bottom is proposed, including the beam bottom formwork and the beam side formwork, and the beam bottom formwork is tightened by the beam bottom horizontal keel and the support frame. The beam side formwork on both sides of the concrete beam is fixed by the beam side transverse keel and the beam side vertical keel, and is fastened with pull bolts or fine-tuning screws. A wooden wedge is wedged in the gap between the beam side transverse keel and the beam side vertical keel, and the wooden wedge and the beam side transverse keel are fixed with nails.

Sponge strips are arranged at the seams of the beam bottom formwork and the beam side formwork.

The length of the bottom surface of the wooden wedge is 60mm, the width is 40mm, and the length of the right-angled side is 70mm.

The arrangement pitch of the wooden wedges is 350mm-450mm.

The utility model drives a wooden wedge between the horizontal keel of the beam side and the vertical keel of the beam side at the fixed place of each pull bolt or fine-tuning screw at the male corner of the concrete beam, and applies pre-pressure to the male corner in advance, and then pours concrete. , the external expansion force will not be greater than the preload, so the formwork will not be displaced. In order to prevent the wooden wedge from loosening, use nails to fix the wooden wedge and the beam side transverse keel, and in the support of the beam bottom and beam side formwork, ensure that the beam bottom formwork is on the beam side formwork, and the joint between the beam bottom formwork and the beam side formwork Attach sponge strips. The utility model has simple structure, can improve work efficiency, avoids material waste and labor consumption caused by beam bottom formwork expansion or grout leakage in traditional technology, improves the efficiency of concrete beam construction, and ensures construction quality.

Description of drawings

Fig. 1 is a schematic diagram of the beam formwork structure reinforced with tension bolts;

Fig. 2 is the structural schematic diagram of the beam formwork reinforced by the fine-tuning screw;

Fig. 3 is A-A sectional view among Fig. 1 and Fig. 2;

Fig. 4 is a node graph at I in Fig. 1 and Fig. 2;

In the figure: 1- beam side formwork, 2- beam side vertical keel, 3- beam side transverse keel, 4- wooden wedge, 5- nail, 6- sponge strip, 7- beam bottom formwork, 8- pull bolt, 9 - fine adjustment screw, 10 - support frame.

detailed description

The utility model is described in detail below in conjunction with accompanying drawing.

A structure for preventing mold expansion at the bottom of a cast-in-place concrete beam, including a beam bottom formwork 7 and a beam side formwork 1, the beam bottom formwork 7 is fastened by the beam bottom transverse keel 3 and a support frame 10, and the beam side formwork 1 on both sides of the concrete beam The beam side transverse keel 3 and the beam side vertical keel 2 are fixed, and the beam side formwork 1, the beam side transverse keel 3 and the beam side vertical keel 2 can be fastened with tension bolts 8, and the specific structure is shown in Figure 1; the beam side formwork 1. The horizontal keel 3 on the beam side and the vertical keel 2 on the beam side can also be fastened with the fine-tuning screw 9, and the specific structure is shown in Figure 2. The junction of the beam bottom formwork 7 and the beam side formwork forms an external angle, and a wooden wedge 4 is wedged in the gap between the beam side transverse keel 3 and the beam side vertical keel 2 at the external angle, as shown in Figure 3, so as to give the external angle part The pre-pressure is applied in advance. When pouring concrete, the external expansion force will not be greater than the pre-pressure, so the template will not be displaced. In order to prevent the wooden wedge 4 from loosening due to the action of the vibrating rod during the concrete pouring process, the After plugging, fix it on the beam side transverse keel 3 with nail 5, as shown in Figure 4. The bottom surface length of wooden wedge 4 is 60mm, and width is 40mm, and the right angle side length is 70mm. The placing pitch of wooden wedges 4 is 350mm～450mm. In order to prevent grout leakage, a sponge strip 6 is pasted at the joint between the beam bottom formwork 7 and the beam side formwork 1.

Claims (4)

1. A structure for preventing mold expansion at the bottom of a cast-in-place concrete beam, including a beam bottom formwork and a beam side formwork, the beam bottom formwork is fastened through the beam bottom transverse keel and the support frame, and the beam side formwork on both sides of the concrete beam passes through the beam side transverse The keel and the vertical keel on the side of the beam are fixed and fastened with pull bolts or fine-tuning screws. The junction of the formwork at the bottom of the beam and the formwork on the side of the beam forms an external angle, which is characterized in that the horizontal keel on the side of the beam and the vertical keel on the side of the beam at the external angle A wooden wedge is wedged in the gap between them, and the wooden wedge and the beam side keel are fixed with nails. 2. The structure for preventing mold expansion at the bottom of a cast-in-place concrete beam according to claim 1, characterized in that: a sponge strip is arranged at the joint between the bottom formwork of the beam and the formwork at the side of the beam. 3. The structure for preventing mold expansion at the bottom of cast-in-place concrete beams according to claim 1 or 2, characterized in that: the length of the bottom surface of the wooden wedge is 60mm, the width is 40mm, and the length of the right-angled side is 70mm. 4. The structure for preventing mold expansion at the bottom of cast-in-place concrete beams according to claim 1 or 2, characterized in that: the wooden wedges are arranged at a distance of 350 mm to 450 mm.