JPH01322064A - Scaffold erection method for construction work performing temporary general grounding using scaffolding steel pipe - Google Patents

Abstract

PURPOSE:To enable the cost of construction to be saved while enhancing safety by using a scaffolding steel pipe building a necessary member in a construction work spot on the ground and collectively lifting the built up scaffold member to be mounted. CONSTITUTION:A scaffold main unit 2 corresponding to the length of a scaffold necessary for construction work, main members 3a, 3b for being linked between scaffold supports and diagonal members 3 of a truss beam are built up into a truss shape on the ground. While a handrail and/or a safety net 6 of the scaffold are also built up simultaneously. The built up scaffold is hoisted up to a predetermined position by winches 18a, 18b winding up a wire rope 13 and connected to scaffold supporting metal fixtures 17a, 17b by using bolts.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a scaffolding method for construction work used in bridge construction work and steel structure construction sites.

[Prior art and problems to be solved by this invention]
Traditionally, the construction methods used at bridge construction and steel structure construction sites include the one-shot construction method, in which the building frame is assembled and a cloth frame, handrails, etc. are attached on top of it; After constructing an FC or via, stretch a wire rope between its spans, then line up steel pipes for scaffolding in parallel on top of it, and secure them to the wire rope. This is a construction method in which scaffold boards, handrails, etc. are installed after construction, and all work involves work at heights, but the current situation is that fatal accidents sometimes occur during scaffolding work performed for safety purposes. Therefore, by eliminating this work at high places and completing all assembly on the ground, technical problems arise in order to improve safety and reduce construction costs.

[Means for solving problems]

This invention was proposed in view of the above-mentioned problems and as a solution to these problems.All the members necessary for scaffolding for construction work should be assembled on the ground. The present invention aims to provide a construction method for scaffolding for construction work, which uses scaffolding steel pipes and fastening fittings as its main components, and uses joints with sufficient allowable stress against axial force as joints. It is something.

[Effect]

Scaffolding beams corresponding to the length of scaffolding required for construction work are joined using joints with strong resistance in the axial direction. or,
The main beams are assembled into a truss shape depending on the length of the span. All members constituting the truss are assembled in a factory or on-site using scaffolding steel pipes and fastening fittings. All horizontal members will be assembled using scaffolding steel pipes and fastening fittings, and then scaffolding boards, handrails, safety nets, etc. will be assembled on the ground. Also, attach the scaffold body fixing fittings, ropes, and pulleys to both ends of the scaffold.

On the other hand, by using walls, vias or india at the height required for the construction work, install the fixing hardware necessary to support the scaffolding, as well as ropes and pulleys to lift the construction scaffolding all at once. Set it up. When all of the above assembly work is completed, - This method uses a hoisting machine such as a winch to lift the scaffold, but the wire ropes, ropes, and pulleys necessary for hoisting should be adjusted according to the total weight of the scaffold. The rope suspension and the number of ropes are determined by what the construction contractor has on hand and are appropriate for the force generated.One signaler, four workers securing the scaffolding, Since the temporary structure of the elevated structure can be constructed by the watchman, the work can be completed safely, easily, and at a reduced construction cost.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. (1) is a via (bridge abutment) for supporting the girder of the bridge, and (2) is the main body of the bridge. After the bridge main body is constructed between the vias, the scaffolding steel pipe of the present invention is used. Next, an example will be described in which the scaffolding method for construction work is used to temporarily construct a temporary elevated structure.

(3a) (ab) is the main material of the scaffolding span,
The upper and lower chords of the truss, where the span distance is L, and the upper chord -
Assuming that the height of the lower chord is H, the ratio of the height of H to the span distance is set to be greater than or equal to LAs. (3) is a diagonal member of a truss beam, and (3a) (a
b) Join. (3C) is a member that connects the truss beams on both sides, and (3) (3a) (3b) (3C) are all made of ≠4EL6 scaffolding steel pipes. (5) is a scaffold board at the work place, and (6) is a safety net. (7a)
(7b) is the ninth fixing bracket for fixing the lifting rope and pulley (pulley) to the top of the via, which is used when constructing the scaffolding method for construction work, which uses scaffolding steel pipes to temporarily construct the upper heel. (8) is a turnbuckle that can be expanded and contracted according to the size of the beer, and is used for tightening the fixing fitting to the beer. (9a) and (9b) are fixtures for fixing the scaffolding body, and (9a) is equipped with ropes and pulleys for climbing, and is installed at the upper chord end of the truss beam. (9
b) is a fixing fitting that is tied together with the wire rope (b), and is installed at both ends of the bottom chord.

By hoisting the wire rope in (2) to a predetermined position using the winch in (to) and connecting it to the scaffolding support fittings in (17a) and (17b) using bolts, perform bulk temporary construction using scaffolding steel pipes. Example 9 shows that the erection of scaffolding for construction work can be easily completed by the method of erecting scaffolding for construction work.

〔Effect of the invention〕

As described in the embodiment described below, this invention can be assembled on the ground without performing work at height, so it is an extremely safe construction method69, and it can be assembled using scaffolding steel pipes that each construction company has on hand, so the construction cost is low. It has a considerable effect on saving money1, and if it is made into tiles, it can be stored as a single pipe of the original scaffolding steel pipe, so it is an invention of practical value.

[Brief explanation of the drawing]

Fig. 2 is a front view showing the constituent parts of the overall construction method of this invention. FIG. 3 is a cross section of the present invention, and FIG. 4 shows a method of constructing a truss beam. FIG. 5 is a cross-sectional view of the upper chord member, showing a portion connected by a fastening fitting. 6th
The figure shows the lifting member and the state in which it is fixed to the beer, and Figure 1g7 is a plan view of Figure 6. Patent applicant: Kiyoshi Nagashima, director of Toki Engineering Yokohama Co., Ltd.

Claims (2)

[Claims] (1) A construction method that uses scaffolding steel pipes for all of the main components of the scaffold, assembles the necessary components, including most of the parts, on the ground at the construction site, and then erects the scaffold all at once. (2) The joints needed to join the members are steel pipe joints for scaffolding, which have strong resistance to external forces in the axial direction.