JPS60258311A - Construction of high structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a construction method for constructing an elevated structure directly above a conventional railway line.

(Prior art and its problems) Conventionally, the construction method for constructing elevated structures directly above commercial lines, etc. has been to set up a movable work platform that straddles the conventional line, and then install shoring and formwork on top of this. Construction is carried out by pouring concrete in place, or pre-cast members manufactured at a work base remote from the construction site are transported to the construction site on an already constructed elevated structure or along the roadside, and then transported using a large crane. Methods such as lifting and assembling are known. However, when using cast-in-place concrete, these construction methods involve assembling and dismantling shoring and roof frames directly above the service line, assembling reinforcing bars, and pouring concrete. As this is a series of repeated operations, there are many dangers to the operating vehicles, making it difficult to ensure safety.Furthermore, the 'FC construction method using precast members requires long-distance transportation of precast members and lifting of heavy materials at the construction site. This method has the disadvantage that the scope of ensuring safety during operations such as transportation is broader, and the cost is higher than that of cast-in-place concrete methods.

(Object of the invention) The present invention solves the drawbacks of conventional construction methods, and involves assembling a floor slab using an existing structure directly above a conventional railway line.
The present invention provides a construction method for constructing an elevated structure that is safe and efficient in construction by sequentially sending out the bridges and constructing the structure using a gate-shaped frame.

(Structure of the Invention) The present invention uses a gate-shaped frame that straddles a conventional business route and runs on a rail that is installed parallel to the route and is equipped with a floor slab lifting device and a floor slab moving girder elevating and retracting device. First, a first block structure consisting of a floor slab supported by a group of pillars erected in parallel on both sides of the line was constructed, and then an adjacent second block structure was constructed on top of the structure. At the same time, a group of pillars for the second block is erected, a girder for moving the floor slab to be connected to the first block is placed on the group of pillars, and the floor slab is moved on the girder. After moving the girder to a predetermined position on the column group and hoisting the deck using the gate-shaped frame, move the girder using the elevating and retracting device to a position where there is no problem with hanging the deck, and then hang the deck and place it on the column group. Place the second one on top.
This method of constructing an elevated structure is characterized in that the elevated structure is constructed by sequentially repeating the steps of building a block structure.

(Example of the invention) An embodiment of the present invention will be described with reference to the drawings.

Figures 1 and 3 are side views for explaining the construction method, and Figures 2 (A) and (B) are A-A and B of Figure 1.
- Front view of B construction, Figures 4 (A) and (B).

(C) is a front view seen from FIG. 3 CC, and is a drawing for explaining the construction order.

First, in Fig. 1, Fig. 2 (A), and (B), 5 is a business route in the United States, either a railroad or a motorway. 1,1'
is a gate-shaped frame, and two sets are used in this example.
The gate-shaped frames 1 and 1' are placed on a rail 2 which is laid parallel to the outside of the line 5 and straddles the line 5. Gate type mount 1,
1', a floor slab (a) lifting device 4 operated by a plurality of hydraulic cylinders is mounted on the crossbeam 3, and a girder 17 for moving the floor slab, which will be described later, is stored on the bracket 6' on the one-leg pillar 3'. It is equipped with an elevating and lowering retracting device 6. Note that the lifting/lowering retracting device 6
is composed of an elevating jack 7 for supporting and adjusting the floor slab moving girder 17 on the pillar 15, and a retracting jack 8 for moving it toward the pillar 3'.

First, the structure 11 of the first block is constructed at the starting point of the construction of the elevated structure using gate-shaped frames 1, 1' and other cranes. This first block structure 11
The road l1li! is located between the gate-shaped frames l and 1'. It consists of a group of columns 12 erected parallel to both sides of the column 5 at one-foot intervals, and a floor slab 13 placed on the upper surface of the column group 12.

Using the structure 11 of the first block as a base point, the column group 15 of the adjacent structure 14 of the second block is then erected along the route 5, and in parallel, a second column is placed on the structure 11 of the first block. A block structure 140 and a floor slab 16 are constructed.

Following the erection of the column group 15 and the construction of the floor slab 16, a pair of floor slab moving girders 17 are mounted. The girder 17
The rear end portion 1 is placed on the support group 15 via the lifting jack 7 of the lifting retraction device 6 placed on the support group 15.
8 is connected to the tip of the floor slab 13 of the structure 11 of the first block, and by adjusting the lifting jack 7, a girder 17 for moving the floor slab is connected.
The upper surface of the n1 pedestal 3' is kept on the same plane as the floor slab 1301 surface.
An overturn prevention device 9 is installed between the floor slab moving girder 17 to maintain the verticality of the floor slab moving girder 17. Next, the floor slab 16 is placed on a plurality of movable carts 19 and pulled to the n1 second block side A.

As shown in Fig. 3, the floor slab 16 is transported to the predetermined position of the column group 15 of the second block. Once the installation position of the floor slab 16 is confirmed, the floor slab 16 is moved to the floor slab lifting device 4 of the gate-shaped frame 1, 1'. Ekudan Suspended n, (
(See Figure 4 (A)) Next, the above-mentioned floor slab moving girder 1
7 is a gate where the fall prevention device 9 is removed n is removed from the column group 15 and the floor slab 13 by the retracting jack 8 of the elevating and retracting device 6 and is retracted to the pedestal 3' side f which does not hinder the hanging of the floor slab 16 It rests on the bracket 6' of the pedestal 3' of the mold stand 1, 1'. (See FIG. 4(B)) Subsequently, as shown in FIG. 4(C), the floor slab 16 is suspended on the column group 15 and joined together to complete the structure 14 of the second block.

Structures for the third block, fourth block, etc. were constructed in the same manner, and between the blocks of each elevated structure, Q connecting girders 20 were successively connected by gate-shaped frames 1 and 1'. (Effects of the Invention) As explained above, the construction method of the present invention utilizes adjacent existing structures to assemble floor slabs, and uses these to move the floor slabs. We use a girder to move and install the product to the specified location, so even though it is cast-in-place concrete, it can achieve the same effect as precast, and does not require a large crane etc. for installation. This is a construction method that allows for the construction of elevated structures safely and efficiently without any impact on vehicle traffic on conventional service lines. Note that this construction method is applicable not only to concrete structural deck slabs but also to deck slabs with steel structural longitudinal girders.

[Brief explanation of the drawing]

Figure 1 is a side view explaining the construction method of the present invention, Figure 2 (
A) and (B) are front views seen from A-A and B-B in Figure 1, Figure 3 is a side view explaining the construction method of the present invention, and Figures 4 (A-) and (B). , (C) is a front view seen from CC in FIG. 3, and is a drawing for explaining the construction order. 1.1'... Gate type mount 2... Rail 3... Cross beam of the gate type mount 3'... Pillar of the gate type mount 4... Floor slab lifting device 5... Line 6 ... Lifting retraction device'
Goose 6'... Bracket 7... Lifting jack 8...
- Retraction jack 9... Fall prevention device 11... Structure of the first block 12.15... Support column group 13.
16... Floor slab 14... 2nd floor. Lock structure 17...Garter for moving the floor slab-19
...Moving trolley 20...For connecting girder Applicant Hazama Co., Ltd. Agent Patent attorney Yujibe Taka j

Claims (1)

[Claims] Using a gate-shaped frame running on rails laid parallel to the route, which is equipped with a floor slab lifting device and a girder elevating and retracting device for moving the floor slab, straddling the conventional business route, first, the bridge was installed on both sides of the route. After constructing the structure of the first block, which is a floor slab supported by a group of columns erected in parallel, the floor slab of the adjacent second block is constructed on top of the structure, and the second block is constructed. A group of pillars of the block is erected, a girder for moving the floor slab to be connected to the first block is placed on the group of pillars, and the floor slab is moved to a predetermined position on the group of pillars on the girder. Then, after hoisting the floor slab using the gate-shaped frame, move the girder to a position where it does not interfere with the suspension of the floor slab by raising and lowering the girder in 5 positions.
A method of constructing an elevated structure, which comprises constructing the elevated structure by sequentially repeating the steps of mounting the floor slab on a group of hanging supports to construct a second block structure.