KR102546771B1 - Construction method for cofferdam using waterproof member - Google Patents

Abstract

The present invention relates to a waterproof member (A) for a cofferdam structure, which is formed as multiple steel pipes (10) having a round transverse section enclosing a working area in a row. The waterproof member (A) includes: a main body (100) including an outer plate (110) installed to close the outside of an area between the steel pipes (10), an inner plate (120) installed by being separated from the outer plate (110) to the inner side to close the outside of the area between the steel pipes (10), and a middle plate (130) installed as a vertical structure on the outer plate (110) and the inner plate (120) so that a gap between the outer plate (110) and the inner plate (120) is maintained; a flexible plate (200) connected to both side edges of the outer surface of the outer plate (110) to cover the outer surface of the steel pipe (10); and a filling pack (300) having a filler injection hole (301) to fill a hollow unit (131) formed between the main body (100) and the steel pipe (10) and having an accommodation space for a filler therein, wherein the filler pack (300) is connected to the middle plate (130) in a bending state. Therefore, the waterproof member (A) enables rapid construction while having excellent waterproof performance.

Description

Construction method of water barrier structure using water blocking member {CONSTRUCTION METHOD FOR COFFERDAM USING WATERPROOF MEMBER}

The present invention relates to the field of construction, and more particularly, to a water blocking member and a construction method of a water barrier structure using the same.

In order to construct an underwater structure such as an intake tower of a water source, a temporary water barrier structure is first constructed around the work area.

For safe and rapid construction within the above working area, it is required that the water barrier structure has excellent water-blocking performance and enables rapid construction.

Korean Patent Registration No. 10-0665563 (pier repair device and repair method using the same) discloses a work table made of foam, a plurality of buoyancy parts on the outer side of the lower part supporting the work table, and a pier support and winding to move the work table up and down on the upper part. Disclosed is a pier repair device equipped with rolls and a repair method using hydraulic, pneumatic, and buoyancy sealed air tubes.

Korean Patent Registration No. 10-0641605 (caisson for working with underwater structures) discloses a caisson for working with underwater structures consisting of a slab and a steel pipe pile supporting a lower part of the slab, which is a body composed of a divided bottom and a divided wall, and a junction between the divided bodies It is made by devices such as water order packing at the junction of the floor body and the steel pipe pile, a buoyancy control pump consisting of a buoyancy tank in the mother body, and a hydraulic cylinder.

However, these conventional technologies have a problem in that the water barrier performance is insufficient or rapid construction is difficult even if the water barrier performance is excellent.

Korea Patent Registration No. 10-0665563 Korean Patent Registration No. 10-0641605

The present invention was derived to solve the above problems, and an object of the present invention is to present a water blocking member capable of rapid construction while having excellent water blocking performance and a construction method of a water barrier structure using the same.

In order to solve the above problems, the present invention is a water blocking member (A) of a water barrier structure formed by installing a plurality of steel pipes 10 having circular cross sections in a row to surround a work area, and the area between the steel pipes 10 An outer plate 110 installed to close the outer side of the steel pipe 10, an inner plate 120 spaced apart from the outer plate 110 to the inside to close the outer region between the steel pipe 10, and the outer plate A body 100 having a middle plate 130 installed in a vertical structure with respect to the outer plate 110 and the inner plate 120 so that a distance between the 110 and the inner plate 120 is maintained; A flexible plate member 200 coupled to both edges of the outer surface of the outer plate 110 so as to cover the outer surface of the steel pipe 10; A filler injection hole 301 is formed on the upper portion to fill the hollow portion 131 formed between the main body 100 and the steel pipe 10, and a filler receiving space is formed therein, and the intermediate plate A charge pack 300 coupled to (130) in a folded state;

The main body 100 is formed in an "L"-shaped cross-sectional structure so as to close between the inner plate 120 and the steel pipe 10, and the inner closure formed on both edges of the outer surface of the inner plate 120. It is preferable to further include a water expansion resistant material 141 filled in the inner closure part 140.

It is preferable that a plurality of intermediate plates 130 are installed at intervals from each other so that the hollow part 131 is narrowed.

It is preferable that a spacing plate 132 is installed at the central portion between the plurality of intermediate plates 130 to maintain a distance between the plurality of intermediate plates 130 .

It is preferable that reinforcing plates 111 and 121 are respectively installed on the central portion of the outer surface of the outer plate 110 and the central portion of the inner surface of the inner plate 120 along the vertical direction.

The filling pack 300, the filling material injection hole 301 is formed on the top, the filling material accommodation space is formed therein, as well as a bag formed of a woven or non-woven fabric made of polyester or polypropylene; It is preferable to include; an injection hose inserted to reach the bottom of the bag through the filler injection hole 301 so as to inject the filler.

It is preferable that the water barrier structure is formed to have a circular cross section as a whole, and the width of the outer plate 110 of the body 100 is greater than that of the inner plate 120.

The present invention is a method of constructing a water barrier structure using the water blocking member (A), wherein a plurality of steel pipes (10) are opened and installed to surround a work area, but the lower ends of the steel pipes (10) are buried in the underwater ground. installation step; Installing the ordering member (A) to close the area between the steel pipes 10, but installing the ordering member so that the inner surface of the flexible plate 200 covers the outer surface of the steel pipe 10; A hollow filling step of injecting and expanding the filling material into the charging pack 300 installed in the hollow part 131;

The filler is preferably formed from a mixture of bentonite and cement.

The steel pipe installation step includes a preparation step of preparing an inclinometer 20 having a probe 21, a sensor 22, a wheel 23, and a cable 24; An external protective pipe installation step of installing an external protective pipe 11 along the outer surface of the steel pipe 10 in a vertical direction so that the inclinometer 20 is inserted and driven; An excavation preparation step of positioning the steel pipe 10 in an upright position at an excavation position in the ground and installing an excavation device inside the steel pipe 10; A pre-excavation measuring step of inserting and driving the inclinometer 20 through the external protective pipe 11 to measure the inclination of the steel pipe 10 in the standing state; A first excavation step of excavating the ground by the first excavation depth (D1) by the excavation device and allowing the steel pipe 10 to be inserted; It is preferable to include; a first excavation and measuring step of measuring the inclination of the steel pipe 10 inserted by inserting and driving the inclinometer 20 through the external protective pipe 11.

In the measuring step before excavation and the measuring step after first excavation, if the error of the measured slope of the steel pipe 10 is greater than the allowable range, the correction of correcting the slope of the steel pipe 10 so that the error is within the allowable range. It is preferable to further include a; step.

After the first excavation and measuring step, a second excavation step of excavating the ground by the excavation device by a second excavation depth (D2) and allowing the steel pipe 10 to be inserted; It is preferable to further include a secondary excavation and measuring step of measuring the inclination of the steel pipe 10 inserted by inserting and driving the inclinometer 20 through the external protective pipe 11.

The outer protective tube 11 is made of steel, and it is preferable that the lower end of the outer protective tube 11 has a sealed attachment 12 inclined downward toward the inside.

The present invention is a method of constructing a water barrier structure using the water blocking member (A), wherein a plurality of steel pipes (10) are opened and installed to surround a work area, but the lower ends of the steel pipes (10) are buried in the underwater ground. installation step; Installing the main body 100 to close the area between the steel pipes 10, but installing a blocking member such that the inner surface of the flexible plate 200 covers the outer surface of the steel pipe 10; a hollow filling step of injecting and expanding the filling pack 300 installed in the hollow part 131; and an inner hollow portion filling step of filling the inner hollow portion of the inner closing portion 140 by the expansion of the water expansion resistant material 141 installed in the inner hollow portion of the inner closing portion 140. The construction method of the water barrier structure is proposed.

The present invention proposes a water blocking member with excellent water blocking performance and capable of rapid construction, and a construction method of a water barrier structure using the same.

1 below shows an embodiment of the present invention,
1 is a plan view of a water barrier structure;
Figure 2 is a plan view of the order member.
Figure 3 is a perspective view of a first embodiment of the order member.
4 and 5 are perspective views of the insertion process of the ordering member.
5 is a plan view of a first embodiment of a water order structure;
6 is a plan view of a second embodiment of a water order structure;
7 is a plan view of a third embodiment of a water order structure;
8 is a plan view of a fourth embodiment of a water order structure;
9 is a plan view of a fifth embodiment of a water order structure;
10 is a perspective view of a second embodiment of the order member.
Fig. 11 is a plan view of a sixth embodiment of a water order structure;
12 is a process chart of a measurement method by an inclinometer in the ground.
13 is a partial perspective view of a steel pipe in which a protective pipe is installed.
14 to 16 are process charts of steel pipe installation steps.
17 is a side view of a steel pipe in which a protective pipe is installed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention basically relates to a water blocking member (A) of a water barrier structure formed by installing a plurality of steel pipes (10) having circular cross sections in a row to surround a work area. (FIG. 1)

The blocking member (A) is composed of the body 100, the flexible plate 200, the charging pack 300, and the inner closing part 140. (FIG. 2)

The main body 100 is spaced apart from the outer plate 110 installed to close the outside of the region between the steel pipes 10 and the outer plate 110 to close the outside of the region between the steel pipes 10. The inner plate 120 and the middle plate 130 installed in a vertical structure with respect to the outer plate 110 and the inner plate 120 are provided so that a distance between the outer plate 110 and the inner plate 120 is maintained.

The flexible plate 200 is coupled to both edges of the outer surface of the outer plate 110 so as to cover the outer surface of the steel pipe 10, and is formed of a rubber material or the like.

In the charging pack 300, a filler injection hole 301 is formed at the top so as to fill the hollow portion 131 formed between the main body 100 and the steel pipe 10, and an accommodation space for the filler is formed therein, It is coupled to the intermediate plate 130 in a folded state.

The inner closing portion 140 is formed in an "a"-shaped cross-sectional structure to close between the inner plate 120 and the steel pipe 10, and is formed on both edges of the outer surface of the inner plate 120, and is closed inside. A water expansion resistant material 141 is filled in the portion 140.

The construction method of the water barrier structure using the above water blocking member (A) is made by the following process.

A plurality of steel pipes 10 are opened and installed to surround the work area, but the lower ends of the steel pipes 10 are buried in the underwater ground. (FIG. 1)

The body 100 is installed to close the area between the steel pipes 10 located in the water, but the inner surface of the flexible plate 200 covers the outer surface of the steel pipe 10. (FIG. 3, 4, 5)

Since the flexible plate 200 made of rubber or the like naturally comes into surface contact with the edges of the steel pipe 10 on both sides by water pressure, it forms an external water-blocking structure of the water barrier structure.

A filling material such as a mixture of bentonite and cement is injected into the filling pack 300 installed in the hollow part 131 to expand it (FIG. 9).

Since the expanded charging pack 300 fills the hollow part 131 formed between the body 100 and the steel pipe 10, it forms a water barrier structure in the center of the water barrier structure.

The inner hollow of the inner closure 140 is filled by the expansion of the water expansion resistant material 141 installed in the inner hollow of the inner closure 140 .

The water expansion resistant material 141 filled in the inner hollow of the inner closure 140 and expanded forms an internal water-blocking structure of the water barrier structure.

For a more perfect order structure, both edges of the inner surface of the inner plate 120 of the body 100 and the contact portion of the steel pipe 10 may be joined by welding (W).

As such, the construction method of the water blocking member (A) and the water barrier structure using the same according to the present invention is a water blocking operation by inserting the water blocking member (A) between the steel pipes 10 and injecting the filler into the charging pack 300 Since this is completed, there are effects such as that rapid construction is possible, and that the order performance is excellent because the multi-order structure is formed by the external order structure, the central part order structure, and the internal order structure.

For quick and easy insertion of the order member (A) between the steel pipes (10), guides are provided on the front (outer surface of the outer plate 110) and rear surface (the outer surface of the inner plate (120)) of the main body 100. Part 410 may be installed. (FIGS. 3, 4, 5, 7)

The guide portion 410 includes a coupling portion 411 coupled to the outer surface of the outer surface of the outer plate 110 and the outer surface of the inner plate 120 of the main body 100; Inclined wing parts 412 extending from both sides of the coupling part 411 so as to be inclined outwardly; are configured to include.

A plurality of plate support parts 420 may be installed on both sides of the outer edge of the outer plate 110 of the main body 100 along the vertical direction so that the flexible plate 200 stably contacts the outer surface of the steel pipe 10. .(Figs. 5 and 8)

The plate support part 420 includes a fixing part 421 coupled to the outer surface of the outer plate 110 of the main body 100; It is configured to include; an inclination extension part 422 extending so as to be inclined toward the outside of the fixing part 421.

Since the plate support 420 is formed of a flexible material, in order to prevent damage due to contact with the plate support 420, it is preferably formed of a flexible steel material such as the plate support 420 or a thin aluminum plate. .

The charging pack 300 is installed to fill the hollow part 131 formed between the main body 100 and the steel pipe 10. If the hollow part 131 is too wide, the size of the charging pack 300 and the filling material must be increased.

In order to prevent this, it is preferable that a plurality of intermediate plates 130 are installed at intervals from each other so that the hollow part 131 is narrowed to an appropriate size. (FIGS. 2 and 3)

In order to prevent the intermediate plate 130 from being deformed by the expansion of the charging pack 300, the spacer plate for maintaining the distance between the plurality of intermediate plates 130 in the central portion between the plurality of intermediate plates 130 ( 132) is preferably installed. (FIG. 10)

It is preferable to reinforce by installing reinforcing plates 111 and 121 along the vertical direction at the center of the outer surface of the outer plate 110 and the center of the inner surface of the inner plate 120, where stress concentration can occur (FIG. 10).

The filling pack 300 has a filler injection hole 301 formed therein, a filler receiving space formed therein, and a pouch formed of woven or non-woven fabric made of polyester or polypropylene; It is preferable to include; an injection hose (not shown) inserted to the bottom of the bag through the filler injection hole 301 so as to inject the filler.

Since the charging pack 300 is coupled to the intermediate plate 130 in a folded state, it does not interfere with the insertion operation of the ordering member A into the area between the steel pipes 10 located in the water, and after completion of the insertion operation, Since it is expanded by the injection of the filler through the injection hose, efficient water-repellent work is possible.

When the water barrier structure is formed to have a circular cross section as a whole (FIG. 1), the width of the outer plate 110 of the main body 100 is slightly larger than the width of the inner plate 120 of the water blocking member (A). It is desirable for a stable bonding structure.

Hereinafter, an embodiment of an excavation method for securing high verticality of the steel pipe 10 will be described.

Basically, a plurality of steel pipes 10 are installed in rows to surround the work area, but the lower ends of the steel pipes 10 are buried in the underwater ground. (FIG. 1)

As shown below in FIG. 12, this embodiment uses the already developed inclinometer 20.

12 is a block diagram of a method for measuring an inclination in the ground using an inclinometer 20 in the ground.

This takes a method of installing a guide tube 30 in a drilled hole in the ground, inserting a probe 21 therein, and then measuring the inclination by depth while pulling up the measuring cable 24.

A displacement sensor 22 and a spring wheel 23 are installed in the probe 21, and a connection part 25 for connection with the probe 21 is installed in the cable 24.

The probe 21 is moved by a cable 24, and the length of the cable 24 is wound or unwound around the drum 26 by human or mechanical force, thereby changing the position of the probe 21. .

A wire through which power and data can move is installed inside the cable 24 to supply power to the probe 21 from the outside and transmit measured data to an external output device 27.

For the use of the inclinometer 20, the cable 24 is supported by the cable support device 28 and is wound or unwound on the drum 26 repeatedly.

This embodiment uses such an inclinometer 20, and is made by the following process.

An inclinometer 20 equipped with a probe 21, a sensor 22, a wheel 23, and a cable 24 is prepared.

An external protective pipe 11 is installed along the vertical direction on the outer surface of the steel pipe 10 so that the inclinometer 20 is inserted and driven. (FIG. 13)

Place the steel pipe 10 in an upright position at the ground excavation position, and install an excavation device such as an auger or drill bit inside the steel pipe 10 (FIG. 14).

When the protective pipe is installed inside the steel pipe 10, the protective pipe 11 is installed outside the steel pipe 10 because there is a risk that the protective pipe may be damaged by the drilling rig driven therein.

When excavation work is performed by the drilling device inside the steel pipe 10, the steel pipe 10 does not rotate, so the outer protective pipe 11 installed on the outer surface of the steel pipe 10 is not damaged by contact with the ground.

In addition, during the insertion work of the steel pipe 10, the external protective pipe 11 is in contact with soil or weathering zones, so it is preferably formed of a strong steel material.

When a general steel pipe is applied as the external protection pipe 11, the guide pipe 30 of the existing inclinometer 20 can be inserted and used therein.

Alternatively, the outer protective tube 11 itself may be manufactured and used in the same structure as the guide tube 30 above.

When the attached attachment 12 is formed at the lower end of the outer protective pipe 11 and slopes downward toward the inside, the outer protective pipe 11 can be easily inserted into the ground together with the steel pipe 10 when the steel pipe 10 is inserted. There is, and there is an effect of preventing damage to the outer protective pipe 11 during the insertion work. (FIG. 17)

The inclinometer 20 is inserted and driven through the external protective pipe 11 to measure the inclination of the steel pipe 10 in a standing state.

If the error of the measured slope of the steel pipe 10 is greater than the allowable range, the slope of the steel pipe 10 is corrected so that the error is within the allowable range.

This correction work is carried out by pulling out the steel pipe 10 and reinserting it, or by slightly changing the support structure of the steel pipe 10 by a temporary facility (not shown) installed to temporarily support the steel pipe 10 in a standing state. can be performed by

The ground is excavated by the first excavation depth (D1) by the excavation device, and the steel pipe 10 is inserted. (FIG. 15)

In this state, the inclinometer 20 is inserted and driven through the external protective pipe 11 to measure the inclination of the inserted steel pipe 10.

Even in this case, if the error of the measured slope of the steel pipe 10 is greater than the allowable range, the slope of the steel pipe 10 is corrected so that the error is within the allowable range.

The ground is additionally excavated by the secondary excavation depth (D2) by the excavation device, and the steel pipe 10 is inserted. (FIG. 16)

In this state, the inclinometer 20 is inserted and driven through the external protective pipe 11 to measure the slope of the inserted steel pipe 10, and if the error of the measured slope of the steel pipe 10 is greater than the allowable range, the The inclination of the steel pipe 10 is corrected so that the error is within the allowable range.

In this way, while repeating some excavation work and measuring the inclination of the steel pipe 10, the drilling hole is excavated to a target depth.

It is known that the measurement method by the inclinometer 20 is extremely superior in precision compared to the conventional measurement method by the koden test.

Therefore, the excavation method according to the present embodiment ensures excellent verticality while repeating the measurement process by the underground inclinometer 20, so high verticality can be applied effectively if necessary.

Since the above has only been described with respect to some of the preferred embodiments that can be implemented by the present invention, as noted, the scope of the present invention should not be construed as being limited to the above embodiments, and the scope of the present invention described above It will be said that the technical idea and the technical idea together with the root are all included in the scope of the present invention.

A: order member 10: steel pipe
11: external protective tube 12: attachment
20: inclinometer 21: probe
22: sensor 23: wheel
100: main body 110: outer plate
111: reinforcement plate 120: inner plate
121: reinforcement plate 130: middle plate
131: hollow part 132: spacing plate
140: inner closure 141: water expansion index material
200: flexible plate 300: charging pack
301: filler injection hole

Claims (11)

As a construction method of a water-blocking structure using a water-blocking member (A) of a water-blocking structure formed by installing a plurality of steel pipes (10) having a circular cross section in a row to surround a work area,
The order member (A),
An outer plate 110 installed to close the outside of the area between the steel pipes 10 and an inner plate installed spaced apart from the outer plate 110 inward to close the outside of the area between the steel pipes 10 120 and a main body having a middle plate 130 installed in a vertical structure with respect to the outer plate 110 and the inner plate 120 so that the distance between the outer plate 110 and the inner plate 120 is maintained. (100);
A flexible plate member 200 coupled to both edges of the outer surface of the outer plate 110 so as to cover the outer surface of the steel pipe 10;
A filler injection hole 301 is formed on the upper portion to fill the hollow portion 131 formed between the main body 100 and the steel pipe 10, and a filler receiving space is formed therein, and the intermediate plate Including; charging pack 300 coupled to (130) in a folded state;
The construction method of the water barrier structure,
A steel pipe installation step of opening and installing a plurality of steel pipes 10 so as to surround the work area, so that the lower ends of the steel pipes 10 are buried in the underwater ground;
Installing the ordering member (A) to close the area between the steel pipes 10, but installing the ordering member so that the inner surface of the flexible plate 200 covers the outer surface of the steel pipe 10;
A hollow filling step of injecting and expanding the filling pack 300 installed in the hollow part 131; including,
The steel pipe installation step,
An inclinometer preparation step of preparing an inclinometer 20 equipped with a probe 21, a sensor 22, a wheel 23, and a cable 24;
An external protective pipe installation step of installing an external protective pipe 11 along the outer surface of the steel pipe 10 in a vertical direction so that the inclinometer 20 is inserted and driven;
An excavation preparation step of placing the steel pipe 10 in an upright position at an excavation position in the ground and installing an excavation device inside the steel pipe 10;
A pre-excavation measurement step of inserting and driving the inclinometer 20 through the external protective pipe 11 to measure the inclination of the steel pipe 10 in the standing state;
A first excavation step of excavating the ground by the first excavation depth (D1) by the excavation device and allowing the steel pipe 10 to be inserted;
A measurement step after the first excavation of measuring the inclination of the steel pipe 10 inserted by inserting and driving the inclinometer 20 through the external protective pipe 11;
A construction method of a water barrier structure, characterized in that it comprises. According to claim 1,
The main body 100,
To close between the inner plate 120 and the steel pipe 10, it is formed in an "A"-shaped cross-section structure, and the inner closing part 140 formed on both edges of the outer surface of the inner plate 120; do,
The water expansion resistant material 141 filled in the inner closure 140;
Construction method of the water barrier structure, characterized in that it further comprises. According to claim 1,
The construction method of the water barrier structure, characterized in that the plurality of intermediate plates 130 are installed at intervals from each other so that the hollow part 131 is narrowed. According to claim 3,
The construction method of the water barrier structure, characterized in that in the central portion between the plurality of intermediate plates (130) is installed a spacer plate (132) for maintaining a distance between the plurality of intermediate plates (130). According to claim 1,
The construction method of the water barrier structure, characterized in that the reinforcing plates 111 and 121 are respectively installed in the central portion of the outer surface of the outer plate 110 and the inner surface of the inner plate 120 along the vertical direction. According to claim 1,
The charging pack 300,
The filler injection hole 301 is formed at the top, the filler accommodation space is formed therein, and a bag formed of woven or non-woven fabric made of polyester or polypropylene;
An injection hose inserted through the filler injection hole 301 to reach the bottom of the bag to inject the filler;
A construction method of a water barrier structure, characterized in that it comprises. According to claim 1,
The water barrier structure is formed so that the cross section is circular as a whole,
The construction method of the water barrier structure, characterized in that the width of the outer plate 110 of the main body 100 is formed larger than the width of the inner plate 120. delete According to claim 1,
The filler is a construction method of a water barrier structure, characterized in that formed by a mixture of bentonite and cement. delete According to claim 2,
A steel pipe installation step of opening and installing a plurality of steel pipes 10 so as to surround the work area, so that the lower ends of the steel pipes 10 are buried in the underwater ground;
Installing the main body 100 to close the area between the steel pipes 10, but installing a blocking member such that the inner surface of the flexible plate 200 covers the outer surface of the steel pipe 10;
a hollow filling step of injecting and expanding the filling pack 300 installed in the hollow part 131;
An inner hollow part filling step of filling the inner hollow part of the inner closure part 140 by the expansion of the water expansion resistant material 141 installed in the inner hollow part of the inner closure part 140.
A construction method of a water barrier structure, characterized in that it comprises.

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