JPH0790824A - Temporary construction of formwork for concrete deposition to both wall surfaces of continuous steel pipe sheet pile structure - Google Patents

Abstract

PURPOSE:To rationalize work to temporarily construct a formwork for concrete lining execution on both of front and back wall surfaces of a continuous steel pipe sheet pile structure and to reduce construction cost. CONSTITUTION:A formwork 11 consisting of a reversal L latter member installing a permanent formwork 15 on the inside of a longitudinal burr 13 free to connect and disconnect is horizontally placed on a continuous steel pipe sheet pile 100 through a jack 16. By inserting and fixing an upper part 31 of a vertical burr formwork 31 installing the permanent formwork 15 and a reused formwork 15 on the inside free to connect and disconnect into and on a forked member 18 on the head end of an upper bracket 12 of the formwork 11, a gate type formwork is formed and temporarily constructed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork for constructing concrete linings on both wall surfaces for the purpose of anticorrosion and reinforcement of splash zones and tidal zones of waterside steel structures such as breakwaters made of continuous steel pipe sheet piles. The present invention relates to a method for temporarily installing concrete-casting formwork on both wall surfaces of a continuous steel pipe sheet pile structure capable of rationalizing temporary construction and reducing construction cost.

[0002]

2. Description of the Related Art In a continuous steel pipe sheet pile structure installed near the water such as in a harbor, there is occurrence of severe local corrosion called concentrated corrosion, especially in a splash zone or a tidal zone such as seawater.
Conventionally, concrete lining has been applied to the part for the purpose of corrosion prevention and reinforcement.

Therefore, the continuous steel pipe sheet pile structure as described above is subjected to concrete lining for the purpose of anticorrosion and reinforcement for the splash zone and tidal zone on both the front and rear wall surfaces of the breakwater and the underwater portion. After a formwork for concrete placement is temporarily installed on the wall surface, concrete is placed in the formwork. In this case, the bottom plate support materials are attached to both underwater wall surfaces of the steel pipe sheet pile by underwater welding, while at the temporary land yard near the site, the large-scale formwork that suits the condition of the site is lifted with a crane to move the bottom plate. Underwater assembly work by a diver will be carried out for a long time, such as by installing and fixing it on a support material.

However, this underwater working environment has a bad field of view and becomes difficult work under adverse conditions such as waves, and temporary construction of the formwork has many problems in terms of work efficiency, construction cost and work safety. It was working. As mentioned above,
In order to improve work efficiency and safety at the time of temporary construction of a concrete placing formwork for applying concrete lining to both front and rear wall surfaces such as a breakwater made of a continuous steel pipe sheet pile structure, the present inventors have various methods. As a result of the examination,
In order to rationalize the temporary work of the formwork for concrete pouring on both side wall surfaces, paying attention to the fact that a gate-shaped formwork parallel to both wall surfaces is effective, and further The present invention has been achieved as a result of repeated studies on whether a portal form can be economically temporarily installed on a continuous steel pipe sheet pile and is easy to remove.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to apply concrete lining to both wall surfaces of a continuous steel pipe sheet pile structure. In order to rationalize the temporary work of the formwork for concrete pouring, to reduce the construction cost and to facilitate the work of removing the formwork.

[0006]

In order to achieve the above object, a method for temporarily placing a concrete casting formwork on both walls of a continuous steel pipe sheet pile structure according to the present invention is a reverse method comprising an upper bracket and a vertical burr. The L-shaped members are connected by a horizontal burr, and a discard form or a diversion form is attached to the inside of the vertical burr, and placed horizontally on the upper bracket above the continuous steel pipe sheet pile via a jack or the like, After fixing the vertical burr in parallel to one wall surface of the continuous steel pipe sheet pile via the lower separator, a forked member or the like extending to the tip of the upper bracket is attached with a discarding form or a diversion form inside. The upper part of the burr formwork is inserted and fixed, and the vertical burr formwork is fixed in parallel to the other wall surface of the continuous steel pipe sheet pile through the lower separator, and the inverted L-shaped member is formed on the continuous steel pipe sheet pile. Place the formwork consisting of By inserting and fixing a vertical burr form at the tip of the upper bracket of the inverted L-shaped member, and fixing the form and the vertical burr form in parallel to both wall surfaces of the continuous steel pipe sheet pile via lower separators, respectively, A formwork for concrete pouring can be easily formed and temporarily installed.

When the head of the continuous steel pipe sheet pile is provided with a superstructure, the upper bracket of the inverted L-shaped member is placed on the superstructure through a jack or the like, and then A formwork for concrete pouring can be temporarily installed by the same procedure.

[0008]

Embodiments Embodiments in which concrete lining construction is performed on both front and rear wall surfaces of a continuous steel pipe sheet pile structure by applying the method for temporarily placing a concrete formwork of the present invention with reference to the drawings As will be described, FIG. 1 is a concrete breaker for constructing concrete on both the front and rear wall surfaces of a breakwater using a continuous steel pipe sheet pile without a superstructure on the head or a structure such as a seawall according to the first embodiment of the present invention. FIG. 2 is a side sectional view showing a state in which a mold is temporarily installed, and FIG. 2 is a view showing an end portion of the upper bracket in FIG.
3 is a plan view in the A direction, FIG. 3 is a side view of the left vertical burr form in FIG. 1 in a suspended state, and FIG. 4 is a front view of a main part in the BB direction in FIG.

First, this formwork is shown by an arrow F of a structure such as a breakwater or a seawall, which is composed of a continuous steel pipe sheet pile 100 formed by joining a plurality of steel pipe sheet piles 101 with joints 102 as shown in FIG. The front L and the rear wall shown by R are temporarily installed to apply concrete lining to the area from the water to underwater for the purpose of anticorrosion and reinforcement, and the inverted L-shaped member 11 itself and concrete at the time of placing the concrete. 20 is the weight of the inverted L-shaped member consisting of the upper bracket 12 and the vertical burr 13 and the horizontal burr 14
1 attached to the upper bracket 12 by connecting with
I am going to receive it via 6.

Inside the vertical burr 13 of the form 11, the precast concrete panel facing the front face F of the continuous steel pipe sheet pile 100, a discard form 15 such as a resin panel or a GRC panel, and a diversion form such as a metal foam plate. 15 is detachably attached by the mounting bolt. In addition, in the case of the waste formwork 15 of the precast concrete panel, it is possible to directly attach it to the vertical burr 13 for building, but in the case of the waste formwork 15 of the resin panel, it withstands the lateral pressure of the concrete 20 to be placed. Since it is necessary to have a strong and thick wall, a thin resin panel can be used as the discarding mold 15 by attaching a metal foam to the vertical burr 13 and attaching a resin panel inside thereof.

A bifurcated member 18 is extended by welding at the tip of the upper bracket 12 of the inverted L-shaped member 11 as shown in FIG. 2, and a vertical burr connected to the bifurcated member 18 by a horizontal burr 14. A hanging bracket 32 as shown in FIG. 4 is fixedly installed on the upper portion of the vertical burr mold 31 so as to fix the upper portion of the mold 31. Further, the horizontal position of the vertical burr member 31 is fixed. Therefore, the wedge-shaped gold arrow 35 is inserted into the gold arrow insertion fixing hole of the bifurcated member 18 and fixed by the pin 34.

Further, inside the vertical burr form 31 is disposed the same as the aforesaid form 1 facing the rear surface R of the continuous steel pipe sheet pile 100.
5 is detachably attached. The formwork 11 and the vertical burr formwork 31 having the above-mentioned configurations are assembled in advance in a factory or the like, and they are transported to a structure to be subjected to concrete lining using a crane or the like. The character-shaped member 11 is a continuous steel pipe sheet pile 100.
1 or directly on the steel pipe sheet pile head through pedestal 40 as shown in FIG. 1 and placed horizontally on the upper bracket 12 via the jack 16 to attach the jack 16 and the steel pipe sheet pile head through pedestal 40. It is fixed with the connecting fixing pin 41.

At this time, the lower stud 27 attached to the underwater stud 25 welded to the lower portion of the continuous steel pipe sheet pile 100 through the connecting metal 26 is passed through the horizontal burr gap C connected to the outside of the vertical burr 13. The separator end nut 28 is tightened and fixed, and the side pressure applied to the inverted L-shaped member 11 at the time of concrete pouring later can be supported by the vertical burr 13 and the horizontal burr 14 of the inverted L-shaped member 11.

Next, the upper part of the vertical burr form 31 is inserted into the bifurcated member 18 at the tip of the upper galleyet 12 of the inverted L-shaped member 11 by the crane via the hanger 37, and the hanging bracket 32 is attached to the bifurcated member 18. It is placed on the top and suspended, and is fixed by the gold arrow 35 and the pin 34. At that time, the reverse L
As with the letter-shaped member 11, in the case of this vertical burr form 31,
The continuous steel pipe sheet pile 100 is fixed in parallel to the wall surface of the rear surface R of the continuous steel pipe sheet 100 through the lower separator 27, whereby a portal form is temporarily installed as a whole.

Next, the vertical burrs 13 and the vertical burrs 13 and the vertical burr 13 are formed along the lower ends of the respective discarding forms 15 of the inverted L-shaped member 11 and the vertical burr form 31 in the gap formed by the lower ends and the channel members 17. A plurality of bottom plate forming rods 19, which are inserted side by side in a direction perpendicular to the burr mold 31 so as to be freely inserted, are pushed in the direction of arrow P until they come into contact with both wall surfaces of the continuous steel pipe sheet pile 100, and a portal form for concrete pouring. Forming the bottom of.

On the other hand, the left and right side surfaces of the portal form are also provided with side plates for concrete placing. In this case, the lateral burrs 14 are vertically staggered with a predetermined gap at both left and right ends thereof. A side plate is inserted into the gap between the three attached channel members, or a plurality of side plate forming rods are stacked and inserted into the gap between the channel members in the same manner as the bottom plate forming rod 19 and are inserted respectively. You may push it in until it touches the wall surface.

Using the portal form having the above structure, concrete 20 is cast on both wall surfaces of the continuous steel pipe arrow wall indicated by F and R, and after curing, the inverted L-shaped member 11 and the vertical length of each discard form 15 and the vertical direction. If the mounting bolts for the burr form 31 are removed, the connecting metal 26 of the lower separator 27 is removed, and the jack 16 of the upper bracket 12 is lowered, the portal form will descend due to its own weight. A surface of the discarding mold 15 and its bottom part that are in close contact with the cast concrete 20;
The gate formwork side is peeled off and the concrete lining construction is completed.

Incidentally, the metal arrow 35 and the pin 34 of the separated gate form are pulled out, and the inverted L-shaped member 11 and the vertical burr form 31 are
If a new discard form 15 is attached, it can be diverted to the next lining construction work again. Since the surface of the constructed concrete lining is the surface of the above-mentioned precast concrete panel or resin panel, the surface finish is clean, deaeration is not required, and the appearance of the lining surface is improved.

Next, FIG. 5 is a diagram for concrete placing when performing concrete lining construction on both front and rear wall surfaces of a structure such as a breakwater using a continuous steel pipe sheet pile with a superstructure on the head according to the second embodiment. FIG. 6 is a side sectional view showing a state in which a portal form is temporarily installed. FIG. 6 is a plan view in the DD direction showing the tip of the upper bracket in FIG. 5, and FIG. 7 is a state in which the vertical burr form on the left side of FIG. FIG. 8 is a front view of a main part of FIG.

The portal form of the second embodiment has substantially the same structure and function as the portal form of the first embodiment shown in FIGS. 1 to 4, and the same parts respectively have the same reference numerals. The difference is that the superstructure 2 made of concrete as shown in FIG. 5 is already installed on the head of a breakwater or the like made of the continuous steel pipe sheet pile 100 shown in FIG. It is that you are.

Generally, this type of superstructure 2 is accurately measured with respect to land and land and is concrete-molded. The upper surface line serves as a height reference, and the front and rear side surface lines are also made of concrete lining. It can be used as a reference for both wall lines. Therefore, in this second embodiment, when the gate formwork is placed and temporarily installed on the continuous steel pipe sheet pile 100 by the same procedure as in the first embodiment, the inverted L-shaped member 11 is
On top of the superstructure 2, jack 1 on the upper bracket 12.
6, or in the case of the stepped superstructure 2 as in the second embodiment of FIG. 5, it is mounted via the jack 16 using the jack pedestal 45.

[0022]

According to the method for temporarily constructing a portal formwork for concrete pouring of the present invention described above, the purpose of anticorrosion and reinforcement on the front and rear wall surfaces of a breakwater or a seawall made of a continuous steel pipe sheet pile structure. In the temporary work of the formwork for concrete placement when constructing the concrete lining with, difficult and dangerous work such as underwater work that was conventionally required on site can be significantly reduced, and the temporary work of the formwork can be facilitated. Work time can be significantly reduced.

As a result, the temporary work of the formwork can be rationalized and the construction cost can be reduced, and the work safety can be improved.
Moreover, the work of removing the formwork after the concrete is placed becomes much easier than in the past.

[Brief description of drawings]

FIG. 1 is a side cross-sectional view of a structure without a superstructure according to a first embodiment of the present invention in which a portal form for concrete placement on both front and rear walls is temporarily installed.

FIG. 2 is a plan view of the tip of the upper bracket in FIG. 1 in the AA direction.

FIG. 3 is a side view of the vertical burr form in FIG. 1 in a suspended state.

FIG. 4 is a front view of a main part in the BB direction of FIG.

FIG. 5 is a side cross-sectional view of a structure in which a portal formwork for placing concrete on the front and rear wall surfaces of a structure having a superstructure on the head thereof according to the second embodiment is temporarily installed.

6 is a plan view in the DD direction showing the tip of the upper bracket of FIG.

FIG. 7 is a side view of the vertical burr form in FIG. 5 in a suspended state.

8 is a front view of the main part in the EE direction of FIG.

FIG. 9 is a perspective view of a main part of a continuous steel pipe sheet pile structure to which the present invention is applied.

[Explanation of symbols]

2 Upper work 11 Reverse L-shaped member 12 Upper bracket 13 Vertical burr 14 Horizontal burr 15 Discarding form, conversion form 16 Jack 18 Bifurcated member 27 Lower separator 31 Vertical burr form 100 Continuous steel pipe sheet pile

Claims (2)

[Claims] 1. An inverted L-shaped member composed of an upper bracket and a vertical burr is connected by a horizontal burr, and a discarding form or a diversion form is attached to the inside of the vertical burr, and the inverted L-shaped member is connected to a continuous steel pipe sheet pile. On the upper bracket horizontally via a jack, etc., fix the vertical burr parallel to one wall of the continuous steel pipe sheet pile via the lower separator, and then extend it to the tip of the upper bracket. The upper part of a vertical burr form fitted with a discard form or a diversion form is engaged and fixed to the installed member, and the vertical burr form is fixed in parallel to the other wall surface of the continuous steel pipe sheet pile through the lower separator. Method of Temporary Placing Formwork for Placing Concrete on Both Walls of Continuous Steel Pipe Sheet Pile Structure. 2. An inverted L-shaped member composed of an upper bracket and a vertical burr is connected by a horizontal burr, and a discarding form or a diversion form is attached inside the vertical burr, and the inverted L-shaped member is connected to a continuous steel pipe sheet pile. After placing it on the upper bracket via a jack, etc. on the superstructure of, and fixing the vertical burr parallel to one wall surface of the continuous steel pipe sheet pile via the lower separator, at the tip of the upper bracket. Engage and fix the upper part of the vertical burr form fitted with the discard form or diversion form to the extended member, and make the vertical burr form parallel to the other wall surface of the continuous steel pipe sheet pile through the lower separator. Temporary installation method of concrete casting formwork on both walls of fixed steel pipe sheet pile structure to be fixed.