CN102392540B - High-precision method and structure for positioning high-precision precast beam - Google Patents

Abstract

The invention belongs to the field of construction engineering, and in particular relates to a high-precision prefabricated beam positioning method and a positioning structure. The method includes the steps of: installing at least one positioning pin on the bottom surface of the end of the prefabricated beam; installing a positioning frame on the side of at least one beam column opposite to the other beam column, the positioning frame has a horizontally extending positioning plate, A positioning hole is opened on the positioning plate; the prefabricated beam is hoisted above the beam column, and its horizontal position is adjusted so that the positioning pin corresponds to the positioning hole; the prefabricated beam is dropped to rest on the beam The upper end of the column, and insert the positioning pin into the positioning hole. The invention has the advantages of high positioning accuracy during installation and stable structure; simple and convenient construction, which greatly saves construction period and manpower and material resources; the positioning tool is simple in structure, reusable and low in cost.

Description

High precision prefabricated beam positioning method and positioning structure

technical field

The invention belongs to the field of construction engineering, and in particular relates to a high-precision prefabricated beam positioning method and a positioning structure.

Background technique

More and more prefabricated beam structures are used in the current building structure. Most of this prefabricated beams are pre-cast in the beam factory as structural parts of the beam body, and then transferred to the construction site for assembly. Therefore, the construction time can be greatly saved. After the prefabricated beam is transported from the beam factory to the construction site, it needs to be hoisted in place with the allowable erection accuracy. However, due to the limited accuracy of the equipment and the influence of surrounding environmental factors, it is basically impossible for the prefabricated beam to be hoisted in place at the scheduled time. Erection precision placement, which requires fine adjustments to the position of the prefabricated beams after placement. The usual practice is to place the prefabricated beams in roughly coincident positions, and then make minor adjustments with tools such as jacks. The above-mentioned construction method has the following disadvantages: first, it increases the construction steps, wastes a lot of manpower and material resources, and prolongs the construction period; After the prefabricated beam is in place, the contact surface with the beam column is small, but the precast beam has a large self-weight, and the prefabricated beam and beam column are all made of reinforced concrete structure, so it is easy to damage the local surface of the precast beam and beam column during the adjustment process.

Contents of the invention

The purpose of the present invention is to propose a high-precision prefabricated beam positioning structure and positioning method according to the shortcomings of the above-mentioned prior art. The positioning method fixes the positioning frame on the beam column and the positioning pin on the precast beam. The cooperation between the positioning frame and the positioning pin can realize fast and high-precision positioning, thereby forming a high-precision prefabricated beam positioning structure.

The object of the present invention is accomplished by the following technical solutions:

A high-precision prefabricated beam positioning method, involving two beams and columns and a prefabricated beam, is characterized in that it includes the following steps:

At least one positioning pin is installed on the bottom surface of the end of the prefabricated beam; a positioning frame is installed on the side of at least one beam column opposite to the other beam column, and the positioning frame has a positioning plate extending horizontally. There is a positioning hole;

hoisting the prefabricated beam above the beam column, and adjusting its horizontal position so that the positioning pin corresponds to the positioning hole;

The prefabricated beam is dropped to rest on the upper end of the beam column, and the positioning pin is inserted into the positioning hole.

The number of the positioning pin and the positioning frame is one, and the method further includes the following step: using the positioning pin as a rotating shaft to adjust the relative position of the other end of the prefabricated beam and the beam column.

The number of the positioning pins and the positioning frames is two, and the two positioning frames are respectively arranged on the opposite sides of the two beams, and the two positioning pins are respectively arranged on the bottom surfaces of the two ends of the prefabricated beam. .

The method includes the following steps: after the positioning of the prefabricated beam is completed, the positioning frame and the positioning pin are disassembled.

The positioning pin includes a conical portion and a cylindrical portion connected coaxially, the end surface of the cylindrical portion is bolted to the bottom surface of the prefabricated beam, the positioning hole is a circular hole, and its diameter is the same as that of the cylindrical portion same diameter.

A high-precision prefabricated beam positioning structure, including two beams and columns and a prefabricated beam, is characterized in that it also includes at least one positioning device composed of a positioning frame and a positioning pin, and the positioning frame is detachably fixed on a beam column opposite The side of another beam column has a positioning plate extending horizontally, and a positioning hole is opened on the positioning plate. The positioning pin is detachably fixed on the bottom surface of the end of the prefabricated beam and can be inserted into/from the positioning hole.

The number of the positioning structures is two, and the positioning frames in the two positioning structures are respectively arranged on the opposite sides of the two beams, and the positioning pins in the two positioning structures are respectively arranged on the two ends of the prefabricated beams. bottom surface.

The positioning frame includes a fixing plate, the fixing plate is attached to the side of the beam column and bolted, and the positioning plate is vertically fixed on the upper edge of the fixing plate.

The two side edges of the fixing plate and the positioning plate are provided with ribs.

At least one nut for bolting to the positioning pin is pre-embedded on the prefabricated beam, and several nuts for bolting to the positioning frame are embedded on at least one beam column.

The invention has the advantages of high positioning accuracy during installation and stable structure; simple and convenient construction, which greatly saves construction period and manpower and material resources; the positioning tool is simple in structure, reusable and low in cost.

Description of drawings

Fig. 1 is the overall schematic diagram of the positioning structure of embodiment 1;

Fig. 2 is a partly enlarged schematic diagram of the positioning device of Embodiment 1;

Fig. 3 is the right side view of embodiment 1 positioning device;

Fig. 4 is an overall schematic diagram of the positioning structure of Embodiment 2.

Detailed ways

The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

As shown in Figure 1-4, the marks 1-14 in the figure are: first beam column 1, second beam column 2, prefabricated beam 3, positioning device 4, positioning frame 5, fixing plate 6, positioning plate 7, positioning Hole 8, positioning pin 9, cone part 10, cylinder part 11, bolt 12, nut 13, rib 14.

The following is a detailed description of the high-precision prefabricated beam positioning structure in conjunction with the embodiments:

Example 1:

As shown in FIGS. 1-3 , the positioning structure involved in this embodiment is mainly composed of a first beam column 1 , a second beam column 2 , a prefabricated beam 3 and two positioning devices 4 . Wherein the first beam column 1 and the second beam column 2 are arranged perpendicular to the ground, and the two ends of the prefabricated beam 3 rest on the first beam column 1 and the second beam column 2 respectively. Wherein the upper ends of the opposite sides of the first beam column 1 and the second beam column 2 are pre-embedded with several nuts 13 , and the bottom surfaces of the two ends of the prefabricated beam 3 are respectively pre-embedded with a nut 13 .

The positioning device 4 is composed of a positioning frame 5 and a positioning pin 9 . The positioning frame 5 is composed of a fixed plate 6 and a positioning plate 7 vertically fixed on the upper edge of the fixed plate 6. The fixed plate 6 is attached to the first beam column 1 (or the second beam column 2) and is opposite to the second beam column. 2 (or the first beam column 1), and bolted to the two beam columns by bolts 12 and nuts 13. When the fixing is completed, the positioning plate 7 is arranged in a horizontally extending shape, and a circular positioning hole 8 is provided on the positioning plate 7 . In order to strengthen the structural strength of the positioning plate 7, the two side edges of the fixing plate 6 and the positioning plate 7 are welded with ribs 14 perpendicular to the two. The positioning pin 9 includes a conical portion 10 and a cylindrical portion 11 connected coaxially. A bolt 12 is arranged at the center of the end surface of the cylindrical portion 11 , and the bolt 12 is bolted to a nut 13 on the bottom surface of the prefabricated beam 3 . The diameter of the cylindrical portion 11 is the same as that of the positioning hole 8 .

Combined with the above-mentioned positioning structure, the following is a detailed description of the working method of this embodiment:

Before the prefabricated beam 3 is hoisted, two positioning pins 9 are bolted on the prefabricated beam 3; at the same time, the positioning frame 5 is installed on the first beam column 1 and the second beam column 2 .

Afterwards, the prefabricated beam 3 is hoisted to the top of the first beam column 1 and the second beam column 2, and its horizontal position is adjusted by tools such as a crane or a chain block so that the two positioning pins 9 correspond to the positioning holes on the two positioning frames 5 respectively. 8. When the prefabricated beam 3 is in the state of hoisting, the movement in the horizontal direction only needs to overcome its inertia. As can be seen from the above structure, the lower end of the positioning pin 9 has a cone portion 10, so when the cone portion 10 When the apex falls within the range of the positioning hole 8, when the prefabricated beam 3 falls, the side of the cone part 10 contacts and slides with the positioning hole 8 until the cylindrical part 11 enters the positioning hole 8 and fits loosely. Since the shape and size of the cylinder 11 match the positioning hole 8, it can be considered that the positioning of the prefabricated beam 3 is completed. The size of the above-mentioned conical part 10, cylindrical part 11 and positioning hole 8 should be determined according to the movement accuracy provided by the tools used for the horizontal movement of the prefabricated beam 3, such as a crane or a chain block. When the accuracy is low, The opening size of the positioning hole 8 should be increased to ensure that the apex of the cone portion 10 can fall therein.

Then drop the prefabricated beam 3 by operating the crane so that it rests on the upper ends of the first beam column 1 and the second beam column 2, and two positioning pins 9 are respectively inserted in the two positioning holes 8. Finish.

Finally, the positioning device 4 is disassembled for the installation and positioning operation of the next prefabricated beam.

Example 2:

Referring to Figure 4, the positioning structure described in this embodiment is substantially the same as that in Embodiment 1. The difference is that only one positioning device 4 is used, and only a number of nuts 13 are buried on the first beam column 1, and only the bottom surface of one end opposite to the first beam column 1 is pre-embedded with nuts 13 on the prefabricated beam 3 for installing the positioning device. 4. With this positioning structure, one end of the prefabricated beam 3 is positioned using the positioning pin 9, and the other end is the same as in the prior art, and the prefabricated beam is placed in a roughly coincident position, that is, after the prefabricated beam 3 is placed, one end is positioned and the other end is not. position. During the operation, compared with the steps of Embodiment 1, the following steps are added: after the prefabricated beam 3 is placed, use the positioning pin 9 as the rotating shaft to finely adjust the position of the other end of the prefabricated beam 3 by tools such as jacks. Compared with Embodiment 1, this kind of structure increases the steps of construction and increases the period of construction. The purpose of such setting is mainly that when the prefabricated beam 3 is hoisted, if the equipment accuracy is not high, it is difficult to make the two positioning pins 9 correspond to the positioning holes 8 at the same time according to the positioning structure in embodiment 1, and only control the position of the positioning pin 3 on one side. Location is relatively easy.

Claims (10)

1. a high-precision precast-beam localization method relates to two beam columns and a precast beam, it is characterized in that comprising the steps:

At least certain position pin is installed on the bottom surface of precast beam end; One locating rack is installed on the side of relative another beam column of at least one beam column, and described locating rack has the location-plate that a horizontal-extending arranges, and offers a locating hole on the described location-plate;

The extremely described beam column of hoisting prefabricated beam top, and adjust its horizontal level so that the corresponding described locating hole of described alignment pin;

Fall described precast beam so that it is held on described beam column upper end, and alignment pin is plugged in the described locating hole.

2. a kind of high-precision precast-beam localization method as claimed in claim 1, the quantity that it is characterized in that described alignment pin and locating rack is one, and described method also comprises the steps: to adjust take this alignment pin as rotating shaft the relative position of the described precast beam other end and beam column.

3. a kind of high-precision precast-beam localization method as claimed in claim 1, the quantity that it is characterized in that described alignment pin and locating rack is two, described two locating racks are located at respectively two sides that beam column is relative, and described two alignment pins are located at respectively the bottom surface at precast beam both ends.

4. such as claim 1,2 or 3 described a kind of high-precision precast-beam localization methods, it is characterized in that described method comprise the steps: described precast beam location finish after the described locating rack of dismounting and alignment pin.

5. such as claim 1,2 or 3 described a kind of high-precision precast-beam localization methods, it is characterized in that: described alignment pin comprises coaxial circular cone body and the cylinder part that joins, described cylinder part end face and described precast beam bottom surface bolt, described locating hole is circular hole, and its diameter is identical with described cylinder part diameter.

6. high-precision precast-beam positioning structure, comprise two beam columns and a precast beam, it is characterized in that: also comprise the positioner that at least one is made of locating rack and alignment pin, the detachable relatively side of another beam column of a beam column of being fixed in of described locating rack, and has a location-plate that a horizontal-extending arranges, offer a locating hole on the described location-plate, described alignment pin is detachable to be fixed on the bottom surface of described precast beam end, and can be plugged in the described locating hole/extract out from described locating hole.

7. a kind of high-precision precast-beam positioning structure as claimed in claim 6, it is characterized in that: the quantity of described location structure is two, locating rack in described two location structures is located at respectively two sides that beam column is relative, and the alignment pin in described two location structures is located at respectively the bottom surface at precast beam both ends.

8. such as claim 6 or 7 described a kind of high-precision precast-beam positioning structures, it is characterized in that: described locating rack comprises a fixed head, described fixed head fit described beam column side and bolt, and described location-plate vertically is fixed in this fixed head upper limb.

9. a kind of high-precision precast-beam positioning structure as claimed in claim 8, it is characterized in that: the both side edges of described fixed head and location-plate is provided with floor.

10. a kind of high-precision precast-beam positioning structure as claimed in claim 6, it is characterized in that: be embedded with at least one on the described precast beam and be used for and the nut of described alignment pin bolt, be embedded with at least one beam column some for the nut of described locating rack bolt.

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