KR200261320Y1 - A Dry F.R.Pstruture center of bridge pier mould construction repair - Google Patents

Abstract

The present invention relates to the FRP special frame for repair to the middle part of bridge dry foundation wells. The bridge dry foundation can reduce the cost of construction and reduce the cost of construction while preventing water pollution and premature corrosion of concrete. It relates to a repair frame to the middle part of a well.

The FRP special frame for repairing to the intermediate point of the dry foundation well container of the present invention has an inner frame having a linear or nonlinear curvature on the inner surface determined according to the shape and the circumference of the foundation well and an angle therebetween. FRP frame body consisting of an outer frame forming a concrete pouring space and forming an outer wall of the foundation well and having a flange at each node, and inclined downward between the inner frame and the inner frame. An external flange for connection between the frame and the outer frame to block the discharge of concrete, located in the lower space of the concrete placing space and the concrete placing space constructed through several angles horizontally opposite to the photograph angle. Joining When the bottom frame and the outer frame is placed on the middle bottom plate on the water, it is attached to the mounting facility so that the heavy load can be received, the bottom plate is supported at the bottom, and the support system is placed between the mounting facility and the FRP frame to float by buoyancy. It refers to the FRP special frame for repair as a repair structure to the middle point of the foundation well.

Description

A Dry F.R.Pstruture center of bridge pier mold construction repair}

The present invention relates to the repair frame to the middle part of bridge dry foundation wells, and more specifically, it replaces the well repair method by steel sheet formwork and underwater concrete pouring to prevent river water pollution and premature corrosion of concrete, It relates to a repair frame down to the middle of a bridge dry foundation well, which can significantly reduce costs and processes and reduce economic and maintenance costs.

Bridge construction is known by filling wells using wells to build bridges in bridge construction.

In general, the form of the well used in the well filling method is to use the iron sheet formwork as shown in FIG. The base well formwork formwork is divided into an internal griddle formwork (1) and an external griddle formwork (2) to make a metal grid, and an angle is maintained between the internal griddle formwork (1) and the external griddle formwork (2) to maintain a constant gap. It is designed to function as a tension member and structurally designed to be safe from lateral pressure.

When the piers are constructed by the filling method in the wells, the inner steel sheet formwork (1) is completely buried in the concrete because the bridge structure is made by filling concrete between the inner steel formwork (1) and the outer steel formwork (2).

In the case of using a metal sheet formwork, the external sheet metal formwork (2) is oxidized little by little (approximately 0.9 mm) in water each year, and the thickness erosion phenomenon becomes intensified, and there is a disadvantage of accelerating concrete corrosion over time.

In particular, the iron formwork in the water source water is oxidized to release a large amount of harmful substances containing iron to become a pollution source of the water source, and as the corrosion progresses, the strength of the pier structure gradually decreases, reducing the safety of the bridge. If the safety of the structure is reduced due to oxidation or concrete erosion or scour, the underwater structure is repaired.

In general, the repair of bridge foundation underwater structures has been dependent on sheet metal formwork and underwater concrete placement.

In the case of bridge foundation wells, in the initial stage of construction, steel sheet formwork is used to pour the filled concrete and make the structure through curing process.In the case of local damage or cracking, the structure is made of steel plate around the relevant part. It is repaired by placing the formwork and pouring underwater concrete again.

As a method for repairing the foundation well and the underwater structure made using the iron sheet formwork, there is a dry operation method and an underwater operation method.

In the dry working method, as shown in FIG. 2, a random barrier is installed at the periphery of the foundation well (S1), and after removing the concrete of the corroded portion of the foundation well (S2), the bottom of the foundation well is Compacting and pouring concrete (S3). And reinforce the reinforcement around the foundation well (S4), and again install the iron sheet formwork by electrical welding (S5), and the concrete is placed between the curing and curing (S6), when the concrete curing is finished dismantle the iron sheet formwork In step (S7) of removing the temporary barrier, which was removed and installed, a method of forming a concrete deposition film on a corresponding portion and the remaining part of the newly damaged foundation well bucket.

Underwater operation method first puts a sheet pile (Sheet Pill) around the foundation well (S1), and removes the water between the foundation well and the sheet pile to remove the water (S2). Then squeeze around the foundation well and pour concrete and reinforce the reinforcement around the foundation well (S3). Then, by electro-welding the iron sheet formwork is installed around the base well, the concrete is poured into the iron formwork and cured (S4). When the concrete curing is finished, the iron sheet formwork is dismantled and the sheet pile is drawn (S5) to finish the repair work.

This dry / underwater repair work method has been practiced for a long time, so there is a lot of experience and know-how, so it is easy to apply the method. Due to the difficulty in handling and functionally, the steel formwork exhibits structural defects that are oxidized in water, which cannot be guaranteed for a long time, and have the disadvantage of accelerating concrete corrosion. Showed problems that cause cracks or defects, and in case of post-management, steel plates are welded into a structure, so cracks and cracks are frequent, which increases the amount of underwater welding repair work, which leads to difficulty in maintenance and Structure caused by fish and shellfish There is a problem that is difficult to maintain due to a lot of influence on the environment, such as being exposed to the synergy of corrosion.

It is therefore an object of the present invention to provide a new repair frame suitable for repairing up to the middle of a dry foundation well.

A feature of the present invention is an inner frame having a linear or nonlinear curvature on the inner surface determined according to the shape and circumference of the foundation well, and an arbitrary space with the inner frame to be combined at an angle to form a concrete pouring space. An FRP frame body consisting of an outer frame forming an outer wall of the bucket and having a flange at each node,

Between the inner frame and the outer frame concrete inclined space constructed through the inclined angle inclined downward and several angles horizontally laid,

Located in the lower space of the concrete pouring space is to connect the outer flange for the connection between the bottom frame and the outer frame to block the discharge of concrete.

When the bottom frame and the outer frame is placed on the middle bottom plate on the water, it is attached to the mounting facility so that the heavy load can be received, the bottom plate is supported at the bottom, and the support system is placed between the mounting facility and the FRP frame to float by buoyancy. It is characterized by a structure for repairing the foundation well.

1 shows a bridge foundation well

Figure 2 is a flow chart for explaining the conventional dry foundation well repair method

Figure 3 is a flow chart for explaining the conventional underwater basin well repair method

Figure 4 is a flow chart for explaining the repair frame to the middle portion of the underwater basal well according to the present invention

Figure 5 is a flow chart for explaining the repair method up to the middle of the basin wells underwater using the FRP special frame for repair to the middle of the well according to the present invention

6 is to show a dry repair frame according to the present invention

(a) a plan view

(b) front view

Figure 7 shows an example of the repair work for repairing the dry basic well bucket using the FRP special frame for repair to the middle of the well according to the present invention (a) ~ (f) is a view showing the maintenance work progress state

8 is to show a repair frame according to the present invention

(a) is an external flange joint frame,

(b) is a perspective view showing an internal flange joint frame

FIG. 8C is a sectional view of the flange joint enlarged in part (b) of FIG. 8. FIG.

9 (a) to (g) is a view showing the state of underwater repair work using a special FRP frame for repair to the middle of the well according to the present invention

10 is to show a repair frame according to the present invention

(a) a plan view

(b) is a sectional view taken along the line C-C 'of (a)

※ Explanation of code about main part of drawing ※

3: foundation well 4: cloak

7: FRP special frame 9: flange

10: FRP bottom plate 11: grooved steel

12: wire rope 15: coupling

16: inner frame 17: outer frame

18: pouring space 19: angle

20: Strut 21: Water Bag

22: support 23: pump

24: water expansion index 25: underwater concrete

26: wire rope 27: anchor bolt

In order to repair dry foundation wells by applying a pre-planned framework based on FRP, it eliminates the corrosion of concrete and the release of iron, thereby reducing the safety and water pollution of the structure, improving the reliability of the foundation wells and reducing the amount of work. It is possible to reduce the cost and increase the durability while reducing the maintenance air, and to improve the overall safety of the bridge by reducing the burden on after-care.

Hereinafter, described with reference to the well container repair frame drawings of the present invention as follows.

The shape of the FRP special frame 7 is an inner frame 16 having a linear or nonlinear curvature on the inner surface determined according to the shape and circumference of the foundation well 3 as shown in FIG. 10, and the inner frame 16 and the existing right frame. FRP frame body and inner frame, which is composed of an outer frame (17) formed at random intervals between the buckets to form a concrete pouring space, and forms an outer wall of the foundation well and has a flange at each node. Between the inclined angle 19 inclined downward and several horizontally horizontal angles between the outer frame 17 and the lower space of the concrete pouring space. In order to block the discharge of concrete by applying a method of joining the FRP special frame (7) and the bottom plate frame (10) by the flange joint from the outside of the water to prevent water from hiding.

Repair frame of the present invention is to use the FRP frame (7) without the distinction between dry / underwater repair method. The FRP frame 7 forms a circular or oval frame intended only by vertical flange joints, and forms a multi-stage circular or oval frame with horizontal flange joints only, and then casts concrete dryly in this frame. To complete. The material applied here is FRP, a reinforced plastic. FRP is a composite structure material of unsaturated polyester resin and glass fiber, and most of the metal materials are used for elements that required corrosion resistance stronger than iron and lighter than aluminum. Corrosion-resistant resin is mainly used as lining material. In terms of corrosion resistance, FRP is far ahead of metal materials, and has a lower cost than metal materials and has good mobility due to installation and weight reduction, so that labor cost is low, there is no problem of rust in water, and it requires little maintenance. In addition, it has a high degree of freedom in design processing, excellent heat insulation, no ion dissolution, appearance appears in color, beautiful appearance, no painting, and strong adhesion to non-metals such as cement. These characteristics of FRP material can be used as a structural material to protect concrete structure or to cure concrete. Some of the problems of rust prevention and concrete corrosion seen in the foundation well, for example, are the outer wall of the foundation well. This can be solved simply by surface treatment with FRP material.Repairing dry foundation wells using the FRP well repair frame like the present invention is more convenient than simply attaching FRP material to the foundation wells to repair the foundation wells. Along with the reinforcement, various defects such as concrete corrosion, flood scour caused by rust, and rust generation can be eliminated, and there is little construction trouble or cost increase for the application of the FRP framework, and it is more advantageous for the follow-up management.

By using the FRP special frame for repair to the middle part of the well according to the present invention, it is possible to solve the problems of iron plate form underwater oxidation and corrosion of the underwater concrete at low cost and to repair only the middle part of the well. It can reduce the cost and easily apply to various repairing methods, so the construction reliability is high. With the relatively simple dry construction method, the outer wall structure of the foundation well can be repaired to semi-permanent structure, and various costs can be reduced to follow-up management. It works.

Claims (3)

Inner frame 16 having a linear or nonlinear curvature on the inner surface determined according to the shape and circumference of the foundation well and combined with an angle 19 at any interval with the inner frame to form a concrete pouring space FRP special frame (7) body consisting of an outer frame (17) forming the outer wall of the water tank and having a flange (9) at each node, and downward between the inner frame (16) and the outer frame (17) FRP special frame and FRP in order to block the discharge of concrete, located in the lower space of the concrete placing space and the concrete placing space (18) built through the inclined angle and several angles horizontally FRP special frame for repairing to the middle part of the bridge dry foundation well, characterized in that the bottom plate frame 10 is joined to the flange (9) from the outside of the water to prevent the water from hiding. delete delete