CN103174093A - Mounting device and mounting method of steel box girder in support zone - Google Patents

Abstract

The invention discloses an installation device and an installation method for a steel box girder in a support area, belonging to the field of bridge construction. The width-type bridge deck crane also includes a sliding support platform arranged around the temporary support platform, and the top platform plane of the sliding support platform is laid and fixed with a connected transverse sliding track and two longitudinal sliding tracks. The installation method includes the following steps in turn: arranging the installation device; hoisting the steel box girder by the luffing deck crane; placing the segmented steel box girder on the sliding support platform; Move to the predetermined steel box girder installation location; repeat to complete the installation of the beam section in the support area. The object of the present invention is to propose a device and method for installing and constructing a frame-dividing-width steel box girder without the parking conditions of a large-scale lifting ship or a lifting crane.

Description

An installation device and installation method for a steel box girder in a support area

technical field

The invention belongs to the field of bridge construction, and in particular relates to the installation and construction of a support section-width steel box girder in the bridge construction process.

Background technique

1) Installation device and technology of steel box girder in traditional support area:

Steel box girder, as an important structure bearing bridge deck load in bridge structure, is widely used more and more. Integral or segmented steel box girders in the traditional support area often use large-scale lifting ships or cranes to hoist and lift the steel box girders transported to the site, and then place the steel box girders on the pre-set by rotating the lifting boom. erected on steel box girder supports.

2) Limitations of traditional construction techniques:

In the traditional method of construction, it is often necessary to use large cranes or cranes. When the on-site hydrological conditions are bad and there are no parking conditions for large-scale lifting ships or lifting cranes, steel box girders often cannot be hoisted. Traditional crafts are limited by conditions.

Contents of the invention

The object of the present invention is to propose a device and method for installing and constructing a frame-dividing-width steel box girder without the parking conditions of a large-scale lifting ship or a lifting crane.

The object of the invention is achieved through the following technical solutions:

An installation device for a steel box girder in a support area, comprising a temporary support platform erected on the longitudinal central axis of the bridge, and the temporary support platform is located in the middle space of the framing of the left and right steel box girders, and is anchored on the The luffing bridge deck crane on the temporary support platform, and the luffing bridge deck crane is also located on the longitudinal central axis of the bridge, and also includes a sliding support platform arranged around the temporary support platform, the A horizontal sliding track and two longitudinal sliding tracks connected to each other are laid and fixed on the top platform plane of the sliding support platform, and the positions of the two longitudinal sliding tracks correspond to the positions of the left and right steel box girders respectively.

An installation method for installing a steel box girder in a support area by using the aforementioned installation device, comprising the following steps in sequence:

1) arrange the installation device;

2) Transport the segmented steel box girder to the design position, and the luffing bridge deck crane lowers the hook and connects to lift the steel box girder;

3) Through the luffing function of the luffing deck crane, place the segmented steel box girder on the sliding support platform;

4) The segmented steel box girder slides horizontally to the longitudinal sliding track through the horizontal sliding track on the sliding support platform, and then slides longitudinally to the predetermined steel box girder installation position through the longitudinal sliding track;

5) Repeat steps 2-4 to complete the lifting and sliding work of multi-piece steel box girders;

6) Repeat step 5 to complete the installation of a symmetrical beam segment;

7) Repeat step 6 to complete the installation of the beam section in the support area.

As a preferred manner, the height of the anchoring position of the luffing deck crane exceeds the height of the steel box girder after installation.

In the above scheme, the steel box girder is prevented from being hindered during the sliding process.

The working process is as follows: After the single-piece steel box girder is hoisted by the luffing deck crane, it slides into place twice through the preset horizontal and vertical sliding tracks. This method is not only applicable to the steel box girder installation in the tower support area, but also suitable for the steel box girder installation in the side span support area.

The beneficial effect of the present invention is that the bridge deck crane can be installed in the mid-span at one time without displacement, and all the steel box girders in the support area can be installed. It is easy to install and does not require large lifting ships and cranes. After the steel box girder in the support area is installed by the luffing deck crane, it can be transferred to the cantilever steel box girder on the spot for installation, without additional purchase cost of the deck crane, and the construction cost is greatly reduced.

Description of drawings

Fig. 1 is the structural representation of the installation device of the steel box girder in the support area of the embodiment of the present invention;

Fig. 2 is the schematic diagram of step 1 of the steel box girder installation method in the support area of the embodiment of the present invention;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is the schematic diagram of step 2 of the steel box girder installation method in the support area of the embodiment of the present invention;

Figure 5 is a top view of Figure 4;

Fig. 6 is a schematic diagram of step 3 of the installation method of the steel box girder in the support area of the embodiment of the present invention;

Figure 7 is a top view of Figure 6;

Fig. 8 is a schematic diagram of step 4 of the installation method of the steel box girder in the support area of the embodiment of the present invention;

Figure 9 is a top view of Figure 8;

Fig. 10 is a schematic diagram of step 5 of the method for installing a steel box girder in the support area according to an embodiment of the present invention;

Figure 11 is a top view of Figure 10;

Fig. 12 is a schematic diagram of step 6 of the method for installing a steel box girder in the support area according to an embodiment of the present invention;

Figure 13 is a top view of Figure 12;

Fig. 14 is a schematic diagram of step 7 of the method for installing a steel box girder in the bracket area according to an embodiment of the present invention;

Figure 15 is a top view of Figure 14;

Among them, 1 is the luffing bridge deck crane, 2 is the temporary support platform, 3 is the sliding support platform, 4 is the longitudinal sliding track, 5 is the horizontal sliding track, 6 is the longitudinal axis of the bridge, and 7 is the steel box beam.

Detailed ways

The following non-limiting examples illustrate the invention.

As shown in Figures 1 to 15, an installation device for a steel box girder in the support area includes a temporary support platform 2 erected on the longitudinal central axis 6 of the bridge, and the temporary support platform 2 is located at the framing of the left and right steel box girders 7 and the luffing deck crane 1 anchored on the temporary support platform 2, and the luffing deck crane 1 is also located on the longitudinal central axis 6 of the bridge, and also includes the temporary support platform 2 Arranged sliding support platform 3, the top platform of the sliding support platform 3 is laid and fixed with a connected horizontal sliding track 5 and two longitudinal sliding tracks 4, and the positions of the two longitudinal sliding tracks 4 correspond to the left and right steel boxes respectively Beam 7 position.

As shown in Figures 2 to 15, an installation method for installing the steel box girder in the bracket area using the aforementioned installation device includes the following steps in sequence:

1) Arrange the installation device, wherein the height of the anchorage position of the luffing deck crane 1 exceeds the height of the steel box girder 7 after installation, as shown in Figures 2 and 3;

2) Transport the segmented steel box girder 7 to the design position, hook and connect the luffing deck crane 1 to lift the steel box girder 7, as shown in Figures 4 and 5;

3) Through the luffing function of the luffing deck crane 1, the segmented steel box girder 7 is placed on the sliding support platform 3, as shown in Figures 6 and 7;

4) The segmented steel box girder 7 slides horizontally to the longitudinal sliding track 4 through the horizontal sliding track 5 on the sliding support platform 3, and then slides longitudinally to the predetermined steel box girder installation position through the longitudinal sliding track 4, As shown in Figures 8 and 9;

5) Repeat steps 2-4 to complete the lifting and sliding work of the multi-piece steel box girder 7, as shown in Figures 10 and 11;

6) Repeat step 5 to complete the installation of a symmetrical beam section, as shown in Figures 12 and 13;

7) Repeat step 6 to complete the installation of the beam section in the support area, as shown in Figures 14 and 15.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (3)

1. the erecting device of a rack area steel case beam, it is characterized in that: comprise the falsework platform of setting up on the longitudinal central axis line of bridge, and described falsework platform is positioned at the middle neutral gear of the framing of left and right width steel case beam, and be anchored at amplitude variation type erection crane on described falsework platform, and described amplitude variation type erection crane is also stayed and is positioned on the longitudinal central axis line of bridge, also comprise the slippage bracket platform of arranging around described falsework platform, lay on described slippage bracket table top platform plane and be fixed with horizontal sliding track and the two straight skidding tracks that are connected, and described two straight skidding orbital positions are width steel case beam position, corresponding left and right respectively.

2. a right to use requires the mounting method of 1 described erecting device mounting bracket district steel case beam, it is characterized in that comprising the following steps successively:

1) arrange described erecting device;

2) transportation piecemeal steel case beam to design attitude, hooks under amplitude variation type erection crane luffing, connects hoisting steel case beam;

3) by the luffing function of amplitude variation type erection crane, piecemeal steel case beam is placed on the slippage bracket platform;

4) piecemeal steel case beam by the horizontal sliding track horizontal sliding on the slippage bracket platform to the straight skidding track, then by straight skidding track straight skidding to predetermined steel pile equipment position;

5) repeat the 2-4 step, complete lifting and the slippage work of multi-disc piecemeal steel case beam;

6) repeated for the 5th step, complete the installation of symmetrical a slice beam section;

7) repeated for the 6th step, complete the installation of support beam section.

3. the mounting method of rack area steel case beam as claimed in claim 2, it is characterized in that: the height of described amplitude variation type erection crane anchorage point surpasses the steel case depth of beam after installation.

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