CN204644883U - The core of In Reinforced Concrete Box Girder - Google Patents

Abstract

The utility model gives a kind of core of In Reinforced Concrete Box Girder, comprises jack and the die body agreeing with In Reinforced Concrete Box Girder endoporus; Die body comprises left template and right template, and right template and left form assembly inside form die cavity jointly; Jack is vertically placed between left template and right template, on the epicoele wall that jack is supported on die cavity respectively and chamber, end wall.The core of this In Reinforced Concrete Box Girder has simple, with low cost, the on-deformable advantage of structure, and achieve installation, remove achieve mechanization, improve efficiency of construction, guarantee the presentation quality of engineering.

Description

Mandrel Form for Reinforced Concrete Box Girder

technical field

The utility model relates to a mold for shaping reinforced concrete engineering parts, in particular to a mold for shaping the inner hole of a reinforced concrete box girder.

Background technique

Reinforced concrete box girder 1 is generally used in highway and municipal professional bridge projects. Box girder 1 is mainly made by pouring. There are mainly two types of construction mandrels for the inner hole 11 of box girder 1. 1. Small section box girder 1 The core mold adopts the airbag filling method, which has the disadvantages of airbag floating, large deformation, and difficult control of geometric dimensions, which in turn affects the overall structural parameters of the box girder 1, and it is assembled with steel and wood materials, which is time-consuming and labor-intensive, and the turnover rate of the formwork is low; 2. The large-section box girder 1 mold uses a mobile formwork, but the one-time investment of the mobile formwork is large, the utilization rate is low, and the cost is high.

Utility model content

The technical problem to be solved by the utility model is to provide a mandrel for reinforced concrete box girder with simple structure and low cost.

In order to solve the above-mentioned technical problems, the utility model provides a mandrel form of a reinforced concrete box girder, which includes a jack and a formwork fitting the inner hole of the reinforced concrete box girder;

The mold body includes a left template and a right template, and the combination of the right template and the left template together forms a mold cavity;

The jack is vertically placed between the left template and the right template, and the jack is respectively supported on the upper cavity wall and the bottom cavity wall of the mold cavity.

After adopting such a structure, the mandrel mold of the reinforced concrete box girder has the advantages of simple structure, low cost, and not easily deformed, and realizes mechanization of installation and dismantling, improves construction efficiency, and ensures the appearance quality of the project.

In order to better understand the technical content of the present utility model, the mandrel of this reinforced concrete box girder is referred to as this mandrel for short below.

The left template and the right template of the mandrel are both composed of an upper mold and a lower mold, and the upper mold and the lower mold are hinged through a hinge; after adopting such a structure, the installation and removal of the left template and the right template are simpler and more convenient.

The lower mold of the left template of the mandrel and the lower mold of the right template are provided with several demoulding components, and the demoulding components at least include a demoulding nut and a demoulding bolt, and the demoulding nut is fixed on the bottom cavity of the mold cavity On the wall, the demoulding bolts cooperate with the demoulding nuts, and the lower ends of the demoulding bolts go through the bottom of the respective lower molds; after adopting such a structure, it is convenient for the left formwork and the right formwork to separate from the box girder after the reinforced concrete box girder is poured and formed. inner hole wall.

The demoulding component of the mandrel also includes a pressure plate, which is fixed to the lower end of the demoulding bolt; after adopting such a structure, the pressure plate can increase the contact area between the demoulding bolt and the inner hole wall of the formed reinforced concrete box girder, and avoid damage to the forming The inner hole wall of the rear reinforced concrete box girder was damaged.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing reinforced concrete box girder.

Fig. 2 is a structural schematic diagram of an embodiment of the mandrel.

Fig. 3 is an enlarged view of part A of Fig. 2 .

Fig. 4 is a diagram of the use state of the embodiment of the mandrel.

Detailed ways

As shown in Figure 2 to 4

The mandrel includes a jack 4 and a mold body matching the inner hole 11 of the reinforced concrete box girder 1;

Die body comprises left formwork 21 and right formwork 22, and the structure of left formwork and right formwork is identical, all is made of upper mold 21a, 22a and lower mold 21b, 22b, upper mold 21a, 22a and lower mold 21b, 22b are sheet-like, Upper mold 21a, 22a and lower mold 21b, 22b middle part all have 90 ° bending, the upper mold 21a of left template 21 is hinged with the lower mold 21b of left template 21 by a plurality of first hinges 31, the rotation of all first hinges 31 The axes are all on the same straight line, the upper mold 22a of the right template 22 is hinged with the lower mold 22b of the right template 22 through a plurality of second hinges 32, and the rotation axes of all the second hinges 32 are all on the same straight line, the right template 22 and the left template The combination of the templates 21 together constitutes the mold cavity 23 .

The jack 4 is a hydraulic jack 4, the cylinder body 42 of the jack 4 is placed vertically on the lower mold 21b of the left template 21 and the lower mold 22b of the right template 22, and the upper end of the hydraulic push rod 41 of the jack 4 is supported on the upper mold of the left template 21 21a and the upper mold 22a of the right template 22, that is, the jack 4 is supported between the upper cavity wall and the bottom cavity wall of the cavity 23, and the first hinge 31 and the second hinge 32 are all in the cavity 23.

The lower mold 21b of the left template 21 and the lower mold 22b of the right template 22 are also provided with multiple groups of demoulding assemblies, and the described demoulding assemblies include a pressing plate 51, a demoulding nut 52 and a demoulding bolt 53, and the demoulding nut 52 is fixed on the bottom wall of the mold cavity 23, the demoulding bolt 53 cooperates with the demoulding nut 52, and the lower end of the demoulding bolt 53 runs through the lower mold 21b of the left template 21 or the lower mold 22b of the right template 22 respectively, and the pressing plate 51 is fixed with demoulding bolt 53 lower ends.

Before pouring reinforced concrete box girder 1, first fix reinforced concrete box girder 1 outer molding template 6, then this mandrel is fixed in the molding template 6, because the length of this mandrel is longer than molding template 6 lengths, so This mandrel stretches out the front and rear sides of molding formwork 6;

First adjust the demoulding bolt 53 of the demoulding assembly to the highest position, then adjust the left template 21 and the right template 22 respectively, so that the lower mold 21b of the left template 21 is in contact with the lower mold 22b of the right template 22, and start jack 4, jack 4 The hydraulic push rod 41 stretches up and leans against the upper mold 21a of the left formwork 21 and the upper mold 22a of the right formwork 22, so that the cross-sectional shape of the mold cavity 23 is fixed, and the core mold is built so far, and the reinforced concrete box girder 1 can be poured .

After the reinforced concrete box girder 1 is formed, the plastic template 6 on the outside of the poured reinforced concrete box girder 1 is removed first, and then the jack 4 is started to shrink the hydraulic push rod 41 of the jack 4, and the upper end of the hydraulic push rod 41 is separated from the left template 21 The upper die 21a of the left template 21 and the upper die 22a of the right template 22, the upper die 21a of the left template 21 and the upper die 22a of the right template 22 rotate along the axis of the first hinge 31 and the second hinge 32 respectively under the action of self gravity, and the left template The upper mold 21a of 21 and the upper mold 22a of the right template 22 are separated from the inner hole 11 of the reinforced concrete box girder 1, and then the demoulding bolt 53 of the demoulding assembly is adjusted to move downward along the axial direction of the demoulding bolt 53, and the demoulding bolt 53 drives the pressing plate 51 to move downward, driving the lower mold 21b of the left formwork 21 and the lower mold 22b of the right formwork 22 to break away from the inner hole 11 of the reinforced concrete box girder 1, and then make the inner hole 11 of the whole reinforced concrete box girder 1 of the mandrel wall for easy removal.

What has been described above is only an embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, some modifications and improvements can also be made without departing from the principle of the utility model, and these should also be Be deemed to belong to the protection scope of the present utility model.

Claims (4)

1. a core for In Reinforced Concrete Box Girder, is characterized by: comprise jack and the die body agreeing with In Reinforced Concrete Box Girder endoporus;

Die body comprises left template and right template, and right template and left form assembly inside form die cavity jointly;

Jack is vertically placed between left template and right template, on the epicoele wall that jack is supported on die cavity respectively and chamber, end wall.

2. the core of In Reinforced Concrete Box Girder according to claim 1, is characterized in that:

Left template and right template are all made up of upper die and lower die, pass through hinge between upper die and lower die.

3. the core of In Reinforced Concrete Box Girder according to claim 2, is characterized in that:

The counterdie of left template and the counterdie of right template are provided with some demoulding assemblies, described demoulding assembly at least comprises demoulding nut and stripper bolt, demoulding nut is fixed on chamber, the end wall of die cavity, stripper bolt and demoulding nut screw connection, and respective corresponding counterdie bottom surface is run through in the lower end of stripper bolt.

4. the core of In Reinforced Concrete Box Girder according to claim 3, is characterized in that: demoulding assembly also comprises pressing plate, and pressing plate and stripper bolt lower end are fixed.