KR101510453B1 - Method for constructing steel house bridge footing using steel plate - Google Patents

Abstract

The present invention relates to a method for constructing a steel house bridge footing using a steel floor plate. The present invention is to quickly construct a footing on a site without using large equipment such as a large barge, a hoist, and the like through both an underwater operation and a marine operation. According to the present invention, the method for constructing a steel house bridge footing using a steel floor plate comprises: a first step of constructing multiple stakes under the sea, and making head portions of the stakes protrude more than the sea floor; a second step of installing lower support brackets under a mean water level as circumference portions of the stakes constructed through the first step; a third step of installing the steel floor plate by fixing the upper portion of the steel floor plate to the stakes to prevent the steel floor plate from floating; a fourth step of constructing a floor structure composed of a steel and concrete by casting antiwashout underwater concrete under water in a casting space of the steel floor plate installed in the third step; a fifth step of installing a wall body mold of the steel; and a sixth step of constructing the footing by casting the concrete.

Description

METHOD FOR CONSTRUCTION STEEL HOUSE BRIDGE FOOTING USING STEEL PLATE BACKGROUND OF THE INVENTION Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a pitched footwork, and more particularly, to a method of constructing a concrete steel house pitched footwork using a steel bottom plate installed in water to construct a footing supporting the pier.

Generally, bridge piers are installed on the footings supported by piles fixed to the seabed to support the top plate.

Patent Document 1 (registered patent No. 10-0744693) is a construction method of footing.

Patent Literature 1 discloses a method for manufacturing a precast panel and a deodorant film, which comprises a step of producing a precast panel and a deodorant mold together with a preform panel and a deodorant mold, A step of fixing a pedestal on which a watertight member is installed on an upper part of a pile base firmly fixed to a support layer, fixing the pedestal balance to the concrete steel house, connecting the wires to the concrete steel house, A step of lifting with a lifting crane and moving to a work site and then inserting a ring watertight member on a pedestal and placing a concrete steel house; and a step of pressing the watertight member and the ring watertight member by self weight of the concrete steel house, Buoyancy to prevent the concrete steel house from floating buoyancy And installed in the safety workbench, the concrete inside the concrete steel house

A step of draining the water, a step of reinforcing the reinforcing bars projected to the upper part of the precast panel and the reinforcing bars inserted into the foundation of the bridge piers, and then the concrete is poured and cured using the concrete pump placed on the working line to construct the footing A step of constructing a bridge pier foundation by pouring and curing the concrete after the pier construction is completed, and separating the preexisting bridge form, the pedestal and the floor pier, It is possible to construct the footing and pier foundation easily by joining the molds together, and it is possible to construct the footing straight without installing separately the gutter film and the formwork, thus it is possible to reduce the construction period and construction cost, There is an advantage that the form can be separated and reused. However, A large barge and a lifting machine are required for manufacturing or transporting a cast panel and for lifting, and thus the construction cost is increased and the air is lengthened.

Patent Document 2 (Registration No. 10-1117927) discloses a method for installing a structure on the sea, comprising: a file installation step of installing a plurality of support files on the seabed ground; A bracket mounting step of providing a lower bracket on a lower portion of the support pile and an upper bracket on an upper side of the lower bracket; Installing a structure on the upper side of the upper bracket so that the structure is exposed to the sea; And lifting the structure and lifting the upper bracket to seat the upper part of the structure on the lower bracket in a state that the upper end of the structure is exposed to the sea, and repeatedly lifting and lowering the structure, The operation is very cumbersome, the air is long, and the lifting equipment must be used for a long time, which increases the construction cost.

Registration No. 10-0744693 Patent No. 10-1117927

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a concrete construction method of a concrete using a steel bottom plate for quickly applying a footing in a field without using large equipment such as a barge and a hoisting machine, Steel house piers foot construction method.

A method for constructing a concrete steel house bridge footwork using a steel bottom plate according to the present invention comprises the steps of: constructing piles on a plurality of seabed so that the pile head protrudes from the bottom of the seabed; A second step of installing a lower bearing bracket on the bottom of the average level of the pile installed through the first step; The bottom plate of the steel having a space for installation is mounted on the lower support bracket provided on the pile in the second step and the upper part of the bottom plate of the steel is fixed to the pile so that the bottom plate of the steel does not float, A third step of installing a bottom plate of the main body; A fourth step of constructing a bottom structure synthesized from steel and concrete by placing underwater depleted concrete in water in the installation space of the bottom plate of the steel installed in the third step; A wall formwork of steel having a predetermined height is installed at the periphery of the floor structure constructed through the fourth step, a wall formwork having an upper portion disposed above the average water level is placed on the periphery of the floor structure, A fifth step of fixing the bottom of the wall formwork to the floor structure to install the wall formwork of the steel; The fifth step is to pump the water inside the box made of the floor structure and the wall formwork, to pile up the head of the pile projected to the upper part of the floor structure, The method of claim 1 or 2, wherein the third step includes: a bottom having a pile hole through which the pile passes; a sidewall portion that is erected at an end of the bottom portion and has an insert on an inner surface thereof; The bottom plate of the steel comprising a ceiling portion extending from the bottom of the steel to prevent leakage of underwaterly insoluble concrete is installed on the pile, the bottom plate of the steel is lifted, the pile is inserted into the pile by inserting and lowering the pile, And is fixed to the pile.

According to the concrete steel house bridge footwork construction method using the steel bottom plate according to the present invention, the bottom plate of steel is manufactured and assembled at a factory or site, and the bottom plate of the steel is mounted on a pile using a small hoisting machine and installed It is possible to construct the footing by simple work of installing the floor structure through underwater work and installing the wall formwork on this floor structure, thus reducing the cost of using large equipment (barge, hoisting machine, etc.) .

1 is a view showing a construction state of a pile by means of a method of constructing a concrete steel house bridge footing using a steel bottom plate according to the present invention.
FIG. 2 is a view showing an installation state of a lower pedestal bracket by a concrete steel house pierching method using a steel bottom plate according to the present invention. FIG.
3 is a view showing a state in which a bottom plate of a steel is mounted by a method of applying a concrete steel house bridge footwork using a steel bottom plate according to the present invention.
4 is a perspective view showing a bottom plate of a steel used in a method of constructing a concrete steel house bridge footwork using a steel bottom plate according to the present invention.
FIG. 5 is a view illustrating a state in which a bottom plate of a steel is fixed by a bottom plate fixing bracket by a method of applying a concrete steel house bridge footwork using a steel bottom plate according to the present invention. FIG.
6 is a state in which an injury prevention bracket is installed by a concrete steel house pierching method using a steel bottom plate according to the present invention.
FIG. 7 is a view showing a state in which a wall formwork of steel is installed by a method of applying a concrete steel house bridge footwork using a steel bottom plate according to the present invention. FIG.
FIG. 8 is a view showing a state in which concrete is poured into a floor structure and a wall formwork by a method of constructing a concrete steel house bridge footing using a steel bottom plate according to the present invention.
9 is a view showing another example of a stopper applied to a method of constructing a concrete steel foot bridge footwork using a steel bottom plate according to the present invention.

A method of constructing a concrete steel house bridge footing using a steel bottom plate according to the present invention is as follows.

1. Construction of piles.

As shown in Fig. 1, the pile 1 supporting the footing is installed in the water. The pile 1 is made of, for example, a steel pipe pile 1a and concrete 1b placed in the steel pipe pile 1a. First, the steel pipe pile 1a is inserted into the water, and the bottom of the steel pipe pile 1a is settled And then the concrete is placed in the steel pipe pile 1a.

The footing is supported by a plurality of piles 1 to provide a plurality of piles 1, and for example, six piles 1 are installed at regular intervals to support a square footing.

2. Construction of floor structure.

The footing constructed according to the present invention includes a floor structure made of steel bottom plate and underwater non-separable concrete, a steel wall structure installed upright on the periphery of the floor structure, a concrete paved in the space of the floor structure and the wall molding And the floor structure is installed first.

The construction process of the floor structure consists of the installation of the bottom support bracket - the installation of the bottom plate of steel -

2-a. Install the bottom bracket.

As shown in FIG. 2, a lower bearing bracket 10 is installed at the periphery of the pile 1. As shown in FIG. The lower support bracket 10 is a structure for supporting the bottom plate 20 of the steel at the bottom and can have any structure capable of supporting the bottom plate 20 of steel such as one ring type and two semicircular joints Do.

The lower support bracket 10 includes a horizontal support portion, a vertical portion extending from the end portion of the support portion and closely or close to the pile 1, and a rib formed between the support portion and the vertical portion, It is possible.

The lower pedestal bracket 10 can be fixed directly to the pile 1, but is installed through the stopper 11 so as to be installed at the same leveling on the plurality of piles 1 and to facilitate installation work.

The installation work of the stopper 11 and the lower support bracket 10 is as follows.

The stopper 11 is composed of a plurality of pieces. For example, three or four stoppers 11 are fixed to the pile 1 by welding or the like through leveling, and the lower bearing bracket 10 is fixed to three or four stoppers 11, The lower support bracket 10 is stably mounted by fixing the plurality of stoppers 11 between the three or four fixed stoppers 11 by welding or the like.

A bottom plate 20 of steel is provided on the lower support bracket 10 and anchor is provided as an index member so that the concrete does not leak through the gap between the lower support bracket 10 and the bottom plate 20 of steel, O-rings above are applicable.

Although the stopper 11 has been described below to be provided below the lower support bracket 10, if the operator is unable to fix the stopper 11 because the position of the lower support bracket 10 is close to the bottom of the seabed, It is also possible to provide the upper bracket 10 on the lower bracket 10.

9, the stopper 11a is in the form of a band plate provided with a welding portion in which an upper part of the stopper 11a is repeatedly provided with a mountain and a valley, and the welded portion of the stopper 11a is made to cover the periphery of the pile 1, The lower bearing bracket 10 is installed by welding and fixing the mountain and trough portion of the periphery of the stopper 11a to the pile 1. [ That is, since the fixing of the stopper 11a and the fixing of the lower support bracket 10 are not performed below the stopper 11a, the installation is easy even if the height from the bottom of the sea floor is low.

3. Install the bottom plate of the steel.

A plurality of piles 1 may be provided with a bottom plate 20 of steel and the bottom plate 20 of steel may be fixedly fixed by fixing the bottom plate 20 of the steel-

3-a. Steel bottom plate mounting.

First, as shown in FIG. 3, the bottom plate 20 of steel is mounted on the lower support bracket 10 to mount it thereon.

4, the bottom plate 20 of steel is made of, for example, a rectangular shape and includes a bottom portion 21 provided with a pile hole 22, side wall portions 23 , And a ceiling portion (24) extending laterally from the end of the side wall portion (23) toward the inside to prevent leakage of underwaterly insulated concrete underwater.

The bottom part 21 can be made of a flat steel plate, the side wall part 23 and the ceiling part 24 can be made of a "C" type channel, 21, a side wall portion 23, and a ceiling portion 24 are formed.

The pile hole (22) is a hole into which the pile (1) is inserted by piercing the bottom portion (21).

As shown in the figure, the ceiling portion 24 can be configured to have a small width that covers only a portion of the bottom portion 21, and of course, can be configured larger than that shown in the drawings, Various configurations are possible under the premise of being able to do so.

Thus, the bottom plate 20 is a box structure having a pouring space formed therein.

A reinforcing material is additionally formed in the bottom plate 20 to increase the bending strength and the like.

The reinforcing member is formed of, for example, a lattice-shaped reinforcing wall 25 (plate, reinforcing bar, etc.) which is built up in the bottom plate 20, a reinforcing wall 25, Members 26 (reinforcing bars, bolts, etc.), and the like. These reinforcing members 25 and 26 can be implemented in various ways such as each or a combination of two.

When the space is partitioned by the reinforcing wall 25, the workability is lowered because it must be placed underwater in all the spaces. Therefore, the reinforcing wall 25 is spaced apart from the bottom portion 21 by a single operation so that the under- It is preferable that they are spaced apart from the upper portion or holes 25a (shown in Fig. 4) through which both sides are passed may be provided. The hole 25a is not limited to the shape shown in the drawings.

A plurality of nuts (27) for fixing the wall formwork are inserted into the side wall portion (23). The nut 27 is pre-fixed to the side wall 23 by welding and a filler material which is separated later can be inserted or clogged in order to prevent penetration of waterproof concrete in the nut hole.

In addition, a grid-like net may be installed on the ceiling of the bottom plate 20 of steel.

The bottom plate (20) of the steel is fixed by lifting equipment. Since only the lifting of the bottom plate (20) of the steel is carried out only once, the lifting equipment is used for a short time It is also possible to work with lifting equipment.

3-b. Fixed bottom plate of steel.

According to the previous process, the bottom plate 20 of the steel is placed on the upper part of the lower support bracket 10, and the bottom plate 20 is in a state of heavy loading. The bottom plate 20 is fixed to the pile 1 in order to prevent this.

As shown in FIG. 5, the bottom plate 20 is fixed to the pile 1 by using a plurality of bottom plate fixing brackets 30.

5, the bottom plate fixing bracket 30 is composed of a bottom portion and at least one protrusion protruded on the bottom portion. The bottom plate fixing bracket 30 is welded and fixed to the bottom plate 20 and the pile 1, To prevent injury and movement.

The bottom plate 20 is installed on the pile 1 through the above process.

4. Installation of underwater unbonded concrete.

The bottom plate 20 is submerged in water and the submersible is submerged in water to cure the submerged untreated concrete 40 in water by placing the submerged concrete 40 under water in the bottom plate 20.

The underwater unbonded concrete is characterized in that there is no gap between the pile 22 of the bottom plate 20 and the pile 1, that is, the watertightness is ensured so that the work can be easily performed later and the occurrence of defects due to penetration of water can be prevented have.

Thus, the floor structure 20, in which the steel bottom plate 20 and the underwater non-separable concrete are combined, is constructed.

5. Install an injury-prevention bracket.

The bottom structure (2) is a composite of steel and concrete, and is provided with an anti-float bracket (50) in order to prevent buoyancy from being injured.

6, a float prevention bracket 50, which is ring-shaped, divided into two or more (two or four), is placed on the floor structure 2, and the float prevention bracket 50 is connected to the pile 1 and the floor structure (2), preferably by welding or the like.

6. Installation of steel wall formwork.

7, the steel wall form 60 is placed on the periphery of the floor structure 2 and the bolts 61 are passed through the wall formwork 60 and screwed into the nuts 27 of the floor structure 2, Thereby providing a wall mold 60.

The wall mold 60 may be a steel plate for reinforcing the concrete of the footing, and a reinforcing material provided on the outer side of the steel plate, and is provided with a lifting ring for lifting.

The upper wall of the wall mold 60 is disposed higher than the average water level so that outside water is not introduced into the concrete pouring and curing.

When the wall mold 60 is installed, a box structure having a space opened at the top by the bottom structure 2 and the wall mold 60 is formed, which will serve as a mold for pouring concrete into the footing. The wall mold 60 will be demoulded after completion of the footing.

In this case, since the box structure 60 is opened at the upper part of the wall formwork 60, the structure may have a weak bending strength, so that the bending deformation may occur due to the concrete pouring pressure, so that a strut 70 may be used to reinforce it.

The strut 70 may be installed in any form for reinforcement of the box structure, for example, be inclined at four corners.

7. Pile head cleaning and concrete pouring.

As shown in FIG. 8, the head of the pile 1 protrudes inside the box structure, and the head of the pile 1 is cut off under the premise that the footing is not damaged. Therefore, the head portion of the pile 1 is not limited to the height of the float prevention bracket 50 as shown in the figure, but may be arranged higher than the float prevention bracket 50 and not higher than the wall formwork 60.

In addition, in order to pour concrete into the box structure, the water in the box structure is pumped to the outside.

After the positive water is completed, reinforcing bars are placed in the box structure in a dry state and concrete 3 is poured. The present invention relates to a footing for supporting a bridge pier, and therefore reinforcing bars integrally synthesized with a bridge pier when the reinforcing bars are installed are arranged together.

Through the curing of the concrete, the bottom structure 2, the steel wall form 60, and the concrete combined footing 100 are completed, where steel and concrete are combined.

After completion of the footing 100, a bridge is constructed on the footing 100.

The wall form 60 is demoulded through the completion of the footing 100 or through the removal of the bolts after the construction of the piers.

1: pile, 2: floor structure
3: Concrete, 10: Lower base bracket
11: stopper, 20: bottom plate
21: bottom portion, 22: pile ball
23: side wall portion, 24: ceiling portion
25: reinforcement wall, 26: stud member
30: bottom plate fixing bracket, 40: underwater unbonded concrete
50: Injury prevention bracket, 60: Wall mold
70: strut, 100: footing

Claims (5)

A first step of constructing piles on a plurality of seabed so that the head of the pile protrudes from the bottom of the seabed;
A second step of installing a lower bearing bracket on the bottom of the average level of the pile installed through the first step;
The bottom plate of the steel having a pouring space therein is mounted on the lower pedestal bracket provided on the pile in the second step and the upper part of the bottom plate of the steel is fixed to the pile so as to prevent the bottom plate of the steel from being floated A third step of installing a bottom plate of the steel;
A fourth step of constructing a bottom structure synthesized from steel and concrete by placing underwater depleted concrete in water in the installation space of the bottom plate of the steel installed in the third step;
A wall formwork of steel having a predetermined height is installed at the periphery of the floor structure constructed through the fourth step, a wall formwork having an upper portion disposed above the average water level is placed on the periphery of the floor structure, A fifth step of fixing the bottom of the wall formwork to the floor structure to install the wall formwork of the steel;
The fifth step is to pump the water inside the box made of the floor structure and the wall formwork, to pile up the head of the pile projected to the upper part of the floor structure, Step 6;
And a seventh step of demolding the wall formwork after finishing the footing through the sixth step,
The third step includes a bottom portion 21 provided with a pile hole 22 through which the pile passes, a side wall portion 23 which is erected on an end portion of the bottom portion 21 and has a nut inserted therein, A bottom plate of steel formed of a ceiling portion 24 extending inward in the direction from the end of the portion 23 to prevent leakage of the underwaterly insulated concrete is installed on the pile, The pile is fixed to the pile after the pile has been inserted into the pile by inserting and lowering the pile,
Characterized in that the bottom plate of the steel comprises a grid-like reinforcing wall (25), at least one stiffener including a stud member, said grid-like reinforcing wall (25) And a hole (25a) spaced apart from the bottom part (21) of the bottom plate of the steel so as to be installed in the entire section and spaced upward or through the both sides is provided. Way. delete [6] The method of claim 1, wherein the fourth step comprises installing a float prevention bracket on the periphery of the pile to support the bottom structure from the top to the bottom in order to prevent flooding of the floor structure after the curing of the under- A method of constructing concrete steel house bridge footwork using steel bottom plate. delete The method of claim 1, wherein the second step comprises: pre-assembling a stopper on the pile, fixing the bottom support bracket to the stopper, fixing the stopper to the periphery of the pile, A band type stopper 11a having a welded portion with repeated mountain and valley is wrapped around the periphery of the pile, and the welded portion and the pile are welded and fixed, and at the periphery of the stopper, the bottom support bracket Wherein the upper and lower support brackets are welded and fixed at the upper side of the lower support bracket.

Images