KR100422216B1 - The method of construction prevening a waterflow of cassion basis for a bridge - Google Patents

Abstract

The present invention relates to a grouting method of the water-stop film for the dry construction of the lower part of the well basin foundation of the bridge, more specifically to the quality of concrete by pouring dry concrete to solve the problem of underwater concrete used in the well basin foundation The grouting method is a watertight foundation of the well basin foundation of a bridge which can secure the construction and allow the safety construction of the foundation of the bridge.

According to the present invention, a method of constructing a well base of a bridge for placing a plurality of barges adjacent to a well base and placing a crane, a pump car, and a ready-mixed concrete on the barge and placing concrete inside the well base In the well, the base of the well is formed a plurality of upper and lower grouting holes in the steel shoe formed at the bottom and the upper and lower grouting holes are respectively coupled to the grouting pipe, the steel shoe side wall steel shoe side At the same time as fastening the bolts to the grouting pipe located in the grouting pipe is inserted into the grouting pipe, and the grouting pipe is inserted into the barge adjacent to the base of the well, the mixer and grouting machine is loaded and then grouting nozzle pipe combined with the grouting machine To the upper and lower grouting holes to grout the outer bottom of the well After reinforcement, the water in the inside of the well base is discharged to the outside through the drainage pipe by using a submersible pump.The well base is placed on the bottom surface of the bottom of the well base by pouring dry concrete after arranging the arm bottom. The watershed foundation of the well of the bridge provides a grouting method, characterized by constructing discarded concrete and laying the foundation concrete and bridge foundation finishing concrete on the bottom surface thereof.

Description

The method of construction prevening a waterflow of cassion basis for a bridge}

The present invention relates to a grouting method of the water-stop film for the dry construction of the lower part of the well basin foundation of the bridge, more specifically to the quality of concrete by pouring dry concrete to solve the problem of underwater concrete used in the well basin foundation The grouting method is a watertight foundation of the well basin foundation of a bridge which can secure the construction and allow the safety construction of the foundation of the bridge.

In general, in the case of installing the bridge at sea or river, etc., a well basin foundation is installed in water so as to support the pier, and a pier is installed on the upper part of the well basin, and a slab is provided on the upper part of the pier. To build the bridge.

In the case of forming the well base, the concrete can be poured using the opening bucket connected to the crane inside the well base, and the filling process of the well base is carried out, or the tremi tube is used. The concrete is poured and the filling process of the well foundation is carried out.

1 is a view showing a conventional method for installing a well base, in which a plurality of barges 22 are positioned adjacent to the well base 20 and a crane 24 is placed on the barge 22. And the pump car 26 and ready-mixed concrete 28 are placed on top thereof.

The opening bucket (32) is coupled to the wire rope (30) to the crane (24), while the mixed concrete being fed from the pump car (26) is loaded on the opening bucket (32) to form a well basin ( 20) Concrete is laid on the inner bottom surface to build the foundation of the well.

In the construction method for forming the well base by the conventional method described above, the underwater concrete is dropped in the construction method, which causes frequent material separation of the concrete, thereby making the internal rock bottom and the solid compaction work on the well base. In particular, the above construction method is impossible to completely adhere the concrete to the bottom rock bottom of the well base, so there is a case where scour occurs on the bottom of the well base. Due to the enormous cost of maintenance and the safety problem, it could cause a large accident.

The present invention has been made in order to solve the above problems, the present invention, by forming a grouting hole in the steel shoe that is installed in the lower part of the well basin base and grouting through the grouting hole was introduced into the water through the bottom surface It is possible to prevent the leakage as much as possible, and when concrete is poured into the inside of the well basin, dry concrete can be poured to smoothly perform the compaction without material separation. In the case of pouring dry concrete, the work can be carried out while visually checking to reduce the maintenance costs that may occur in the future, or to provide a grouting method for the foundation of the wells of bridges with a reinforced structure in terms of safety. For that purpose.

The present invention has been made in order to achieve the above object, the present invention, a plurality of barges are placed adjacent to the base of the well and the crane, pump car and ready-mixed concrete on the barges above the right after the concrete In the construction method of the well basin of the bridge to be poured into the base of the bucket, a plurality of upper and lower grouting holes are formed in the steel shoe formed on the bottom of the well basin, and grouting in the upper and lower grouting holes, respectively. The pipe is coupled to the steel shoe, and the fastening bolt is closed to the grouting pipe located on the inner wall of the steel shoe, and at the same time, an index rubber ring is inserted into the grouting pipe, and a mixer is provided on the barge adjacent to the well base. Grouting nozzle pipe for grouting combined with upper and lower grouting After grouting and reinforcing the outer bottom of the well basin foundation, drain the water inside the well basin foundation to the outside through the drainage pipe using a submersible pump. Provide the grouting method for the foundation of the wells of bridges, which is characterized by placing dry concrete on the bottom surface of the well base and laying the ground concrete on the bottom surface and placing the foundation concrete and bridge foundation finishing concrete on the bottom surface. do.

In addition, in the present invention, the steel shoe is constructed by welding the inner wall steel shoe and the outer wall steel shoe, while the inner wall steel shoe and the outer wall steel shoe have a plurality of upper grouting holes and lower grouting holes formed horizontally on the same horizontal plane. Each of the upper grouting hole and the lower grouting hole is horizontally coupled to the grouting pipes having hole contact portions formed on both sides thereof. The grouting pipes have circular contact portions formed on the side where the hole contact parts are formed, respectively. It is in close contact with the lower grouting hole, the index rubber ring is inserted into the grouting pipe, and the fastening bolt is formed in the hole close contact with the inner wall steel shoe in the grouting pipe to open and close the penetrating part of the grouting pipe. Structure.

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the construction method of providing the conventional well base.

2 is a view showing a method for installing a well base of the present invention.

Figure 3a is a side view for explaining the grouting hole used in the well base of the present invention, Figure 3b is a plan view for explaining the grouting hole used in the well base of the present invention.

Figure 4a is a view showing the state of the inner surface of the steel shoe used in the well base of the present invention, Figure 4b is a view showing the state of the outer surface of the steel shoe used in the well base of the present invention, Figure 4c Sectional drawing which shows the cross-sectional state of the side surface of the steel shoe used for the well base of this invention.

5 is a view showing an exploded state of the steel shoe used in the well basin base of the present invention.

Figure 6 is a view showing a construction state grouting on the well base of the present invention.

<Description of Symbols for Main Parts of Drawings>

50: well base 52: steel shoe

54: inner wall steel shoe 56: outer wall steel shoe

58: upper grouting hole 60: lower grouting hole

62: grouting pipe 64: hole contact portion

66: round contact 68: index rubber ring

70: fastening bolt 72: hole protector

76: barge 78: blender

80: grouting machine 82: nozzle pipe

84: submersible pump 86: piping for drainage

88: ready-mixed concrete 90: pump car

92: concrete discarded 94: foundation concrete

96: Bridge foundation finishing concrete

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, the structure and working state of this invention are demonstrated.

Fig. 2 is a view showing a method for installing a well base of the present invention, in which the steel shoe 52 is provided at the bottom of the vertical length in the well base 50, and the steel shoe 52 is attached to the well. The grouting pipe 62 is installed on the inner side.

A barge 76 is positioned adjacent to the well basin base 50, and a blender 78 and a grouting machine 80 are loaded on the barge 76, and a nozzle pipe 82 is provided to the grouting machine 80. ) Is connected.

Watering operation for the well basin base 50 is carried out using a water pump 84, the water extraction operation is performed after the excavation of the arm nozzle pipe 82 connected to the grouting machine (80) The grouting is completed by injecting the grouting agent through the grouting hole, and when the grouting operation is completed, the watering operation is performed.

At this time, the flushing operation is ejected to the outside through the drain pipe (86) connected to the water pump (84).

Figure 3a is a side view for explaining the grouting hole used in the well base of the present invention, Figure 3b is a plan view for explaining the grouting hole used in the well base of the present invention.

The well base 50 is provided with a steel shoe 52 at the bottom thereof. The steel shoe 52 has a grouting pipe 62 at the upper end and the lower end in the inner height direction of the steel shoe 52, respectively. Is installed. That is, the grouting pipe 62 is horizontally coupled and fixed to the inside of the steel shoe 52 so as to form two stages inside the steel shoe 52.

The steel shoe 52 is provided with a hole guard 72 at the upper and lower portions, respectively, on which the grouting pipe 62 is installed. That is, the hole protector 72 is installed on the inner surface of the steel shoe 52 and is installed above and below the grouting hole in which the grouting pipe 62 is installed so that the grouting pipe 62 does not receive external interference.

Figure 4a is a view showing the state of the inner surface of the steel shoe used for the well base of the present invention, Figure 4b is a view showing the state of the outer surface of the steel shoe used for the well base of the present invention, Figure 4c Is sectional drawing which shows the cross-sectional state of the side surface of the steel shoe used for the well base of this invention.

As can be seen in Figure 4a, the steel shoe 52 is formed with a plurality of upper grouting hole 58 and the lower grouting hole 60 on the inner wall and the outer wall where the grouting pipe 62 is installed, wherein The steel shoe 52 of the grouting pipe 62 is installed between the inner wall and the outer wall formed at regular intervals, the upper grouting hole 58 and the lower grouting hole 60, the upper grouting hole 58 on the inner wall surface ) And the hole protector 72 is installed above and below to protect the lower grouting hole 60).

That is, the hole guard 72 is formed in two stages at the upper and lower positions of the upper grouting hole 58 and the lower grouting hole 60 is installed.

The upper grouting hole 58 is installed in the plurality of the same height at the upper end of the inner surface of the steel shoe 52, the lower grouting hole 60 is installed in the plurality of the same height at the lower end of the inner surface of the steel shoe (52) do.

As can be seen in Figure 4b, the steel shoe 52 is provided with a plurality of upper grouting hole 58 and the lower grouting hole 60 on the outer wall surface.

As can be seen in Figure 4c, the above-mentioned steel shoe 52 is provided with a grouting pipe 62 between the inner wall and the outer wall, and the water resistant rubber on the inner surface of the grouting pipe 62 of the steel shoe 52 is installed. The ring 68 is installed, and the portion of the above-mentioned rubber ring 68 is installed by the fastening bolt 70 and is provided with a hole protector 72 for protecting the upper grouting hole and the lower grouting hole.

5 is a view showing an exploded state of the steel shoe used for the well basin base of the present invention, wherein the steel shoe 52 is composed of an inner wall steel shoe 54 and an outer wall steel shoe 56, wherein the inner wall The steel shoe 54 and the outer wall steel shoe 56 are provided with a plurality of upper grouting holes 58 and lower grouting holes 60 at the same height.

The upper grouting hole 58 and the lower grouting hole 60 are coupled to the hole-adhesive portion 64 of the grouting pipe 62, wherein the grouting pipe 62 is in close contact with both holes 64 in the longitudinal direction. Circular contact portion 66 is formed on each side of the) is formed to be in close contact with the upper grouting hole 58 and the lower grouting hole (60).

The grouting pipe 62 has an index rubber ring 68 inserted therein, and in particular, the grouting pipe 62 has a fastening bolt 70 in a hole contact portion 64 in close contact with the inner wall steel shoe 54. Is formed to close the penetrating portion on the inner wall side of the grouting pipe 62.

The steel shoe 52 is closed using a fastening bolt 70 on the inner surface of which the grouting pipe 62 is installed.

6 is a view showing a construction state grouting on the well base of the present invention.

The first step is to perform underwater grouting at the bottom of the well basin foundation.

That is, the barge 76 is positioned adjacent to the well base 50 above, and the blender 78 and the grouting 80 are loaded on the barge 76 directly above the grout. One side of the nozzle pipe 82 is connected to the machine 80.

At this time, the nozzle pipe 80 is connected to the upper grouting hole and the lower grouting hole formed at the other side of the steel shoe 52 to grout the outer surface of the well base 50.

The second step is to pour dry concrete after watering the bottom inner surface of the well foundation.

That is, the above water well base 50 is located in the lower surface of the submersible pump 84 and the water existing in the inside of the well base 50 through the drainage pipe 86 to the outside and then Using the ready-mixed concrete 88 and the pump car 90 located on the upper part of the barge 76, the dry concrete is poured into the inside of the well base.

The third step is to finish the well basin.

That is, the bottom concrete (92) is primarily formed by pouring dry concrete on the inner bottom surface of the well base (50), and the base concrete (94) is formed on the top of the bottom concrete (92) It is the step of pouring the foundation concrete 94 in the upper portion of the foundation concrete 94 is the step of completing the construction of the well base.

Effects of the configuration and operation of the present invention described above will be described.

The ground film grouting method of the well basin foundation of the bridge of the present invention forms a grouting pipe and a top / bottom grouting hole in the steel shoe installed below the well foundation, so that grouting can be performed with a reinforcement structure for the well foundation. It is possible to provide a solid pier foundation, and also the water-proof grouting method of the well basin foundation of the bridge, in the case of pouring underwater concrete inside the well foundation, Separation does not occur to ensure the quality of the concrete.

In addition, the groundwater grouting method of the well basin of the bridge has the effect of reducing the enormous repair costs incurred in the bridge because it can safely construct the well foundation that forms the foundation of the bridge.

Claims (2)

In the construction method of the well base of the bridge in which a plurality of barges are placed adjacent to the well base and the crane, the pump car and the ready-mixed concrete are placed on the barge, and concrete is poured into the inside of the well base. On the base of the well 50, a plurality of upper and lower grouting holes 58 and 60 are formed in the steel shoe 52 formed at the bottom thereof, and the upper and lower grouting holes 58 and 60 are respectively grouted. The pipe 62 is coupled to the steel shoe 52 by fastening the bolt 70 to the grouting pipe 62 located on the inner wall of the steel shoe side to finish and at the same time the water rubber to the grouting pipe 62 The grouting nozzle pipe coupled with the grouting machine 80 is loaded with a mixer 78 and a grouting machine 80 in the barge 76 adjacent to the well base 50. 82) to the upper and lower grouting holes (58) (60). After grouting and reinforcing the outer bottom of the well base, the water in the inside of the well base 50 using the submersible pump 84 is discharged to the outside through the drainage pipe 86, and the well The foundation (50) is installed on the bottom surface of the well basin (50) after the bottom of the arm to clean up the bottom concrete (92) and the bottom surface of the concrete (94) and pier foundation concrete (96) The ground film grouting method of the foundation of the wells of the bridge, characterized in that the construction by pouring. The steel shoe 52 is composed of an inner wall steel shoe 54 and an outer wall steel shoe 56, and welded to the inner wall steel shoe 54 and the outer wall steel shoe 56. The top grouting holes 58 and the bottom grouting holes 60 are formed horizontally on the same horizontal plane, and each of the top grouting holes 58 and the bottom grouting holes 60 has a hole contact portion 64 on both sides thereof. The formed grouting pipe 62 is horizontally coupled, and the grouting pipe 62 has circular contact portions 66 formed on the side where the hole contact portion 64 is formed, so that the upper grouting hole 58 and the lower grouting are formed. In close contact with the hole 60, the rubber ring 68 is inserted into the grouting pipe 62 in the inner side, and the hole contact portion 64 in close contact with the inner wall steel shoe 54 in the grouting pipe 62. The fastening bolt 70 is formed in the) to open and close the through portion of the grouting pipe 62 The ground film grouting method of the well basin of the bridge, characterized in that the joining.