KR20110107888A

KR20110107888A - Construction method of the pier without the temporary dam in the sea or the river

Info

Publication number: KR20110107888A
Application number: KR1020100027026A
Authority: KR
Inventors: 홍문표
Original assignee: 홍문표
Priority date: 2010-03-26
Filing date: 2010-03-26
Publication date: 2011-10-05
Also published as: KR101256265B1

Abstract

The present invention relates to an underwater bridge construction method that omits a wide range of temporary barrier construction, and in order to save construction costs and shorten the construction period, a file placed at a precise point using a GPS in a barge equipped with pile placing equipment and a crane, etc. Insert the core pile space of the piers designed and prepared from geological survey data on the ground, remove the soft ground of the foundation space through the access space, sit on the rock ground, fill the space with reinforced concrete, and fix the piers to the rock. As the remaining work is completed at the water level, most of the on-site work from temporary water barrier construction to dismantling construction is omitted or reduced, which reduces investment costs and shortens the construction period, and keeps tidal flows and river flows during construction. It is characterized in that to minimize.

Description

Underwater pier construction method to omit temporary barrier construction. {Construction method of the pier without the temporary dam in the sea or the river}

The present invention relates to an underwater pier construction method that omits a wide range of temporary barrier construction, and more particularly, to assemble the pier made to a certain standard on the ground to the pile placed at the correct point using GPS, and the softness of the foundation space After the ground is removed and settled on the rock ground, it is filled with reinforced concrete, the pier is fixed to the rock, and the remaining work is about the underwater bridge construction method.

When constructing bridges or tidal power plants in rivers and deep waters where there is a lot of water, the most expensive investment and time is required. In order to seamlessly connect the rock and the foundation of the bridge, this project cannot be carried out unless a large area of tens of times the foundation area is revealed by the construction of a water barrier. Especially, the tidal power plant depends on the depth of the construction area, the depth of the soft ground, and the height of the structure. This is because extensive excavation work should be started from several tens of meters below sea level.

The Sihwa Tidal Power Plant, which builds hundreds of meters of tidal power plants, was constructed with water barriers and artificial islands of 2km in length, even though a seawall was used on one side, and the construction was suspended for more than six months. In addition, the earth and sand that pulled the soft ground to reveal the rock ground can produce thousands of flat man-made islands with tens of thousands of trucks.

Therefore, there is a need for a construction method that can accurately expose the pier to the designed position and expose the surface of the water without the need for water barrier construction. If only the top of the bridge is placed on the surface of the water, the remaining work can be carried out smoothly on the water.

It is to combine the pier on the ground with the underground rock at the correct location, or to combine the pile and the foundation of the piling into the rock, and several technical construction processes must be met. In other words,

First, the piers are fixed with piles so that they can stand vertically even on a sloped floor,

Second, the foundation of the bridge should be able to easily dig the soft ground,

Third, to remove the soil supporting the foundation space of the piers to descend to the rock ground. Fourth, to combine the empty foundation space with rock or pile, excavators and pile placing equipment with diameter of 1m or more using a GPS tracking device such as oil drilling ship Barges with large cranes and dredging pumps are needed.

Document 1 KR 10-2009-0088811. September 21, 2009, p. 7, drawing 3. Document 2 KR 10-2009-0088810. Sept. 21, 2009, p. 9, drawing 5. Document 3 KR 10-2009-0088807. September 21, 2009, p. 8, Drawing 1.

Therefore, the purpose is to save construction costs and shorten the construction period by combining the piers perfectly on the rock ground without going through the temporary barrier construction depending on the water depth, velocity, wave, structure of the structure and finishing the rest on the water.

In order to achieve the above object, when assembling the outer wall formwork 152b of the piers integrally from the base space 151 to the top according to the design made by the geological survey data on the installation site, the interior of the piers a plurality of central pile space And an entrance space 149 for removing the soft ground of the foundation space 151, and make the thickness of the foundation space wall 151a constant or narrow at the bottom and wide at the bottom. Attach a steel bit 154 having a right triangle in cross section to protect it.

The central pile 148 has a diameter of 1/2 to 2/3 of the width of the piers, and has a thickness that can pass through the central pile space 148a with almost no play, and the upper end of the pile is embedded in a rock. The length of the piers (95) can rise up to two-thirds of the height.

Using the GPS input of the design drawing, the pier 95 is inserted into the central pile 148 in which the number (2 to 3) required for each pier is placed vertically and accurately at the design position. The core piles 148 are driven one by one, and the piers 95 are seated, and the remaining core piles 148 are driven to maintain the vertical state, and the waterproof curtain 158 attached to the outer wall of the piers 95 is provided with earth and sand. Press to block the inundation tunnel, remove the soft ground supporting the foundation space 151 with a dredging pump to sit the steel bit 154 on the rock and then assembled the reinforcing bar and the foundation space 151 and access space ( 151) filled with concrete.

After the pier installation is completed, the water gates are blocked by both gates 76 and the soft ground 157 is removed, and then the aberration foundation 103 is made of reinforced concrete, or the aberration foundation 103 manufactured on the ground is placed between the piers 95. It is assembled and fixed with a pile 32, and the road top plate 124a or the power plant structure top plate 160 is assembled to finish the remaining work on the top plate.

The deeper the water, the shorter the construction of the temporary barrier, which is inevitable, the construction period is shortened and construction costs are greatly reduced, and the tidal flow or the water flow is maintained normally during the construction period.

1 is a cross-sectional view of a formwork of a piers containing a central pile space and an access space
2 is a cross-sectional view of the inner and outer wall formwork of the base space portion of the piers
Figure 3, pier outer wall formwork elevation
4 is an upside down pier formwork longitudinal section view
5 is a bridge pier longitudinal cross-sectional view
Figure 6 is a bridge pier cross-sectional view
7 is a top cross-sectional view of the piers of tidal power plant
8 is a cross-sectional view of the basic space of the tidal bridge piers
9 is a plan view of the aberration of the tidal power plant
10 is a plan view of the tidal power plant road deck and power plant deck
11 is an elevational view of an tidal power plant equipped with a pumping device
12 is an elevation view of a tidal power plant piers

With reference to the drawings will be described in detail with respect to the underwater bridge construction method to omit the temporary water barrier construction.

According to the geological survey of the construction area, the length of the central pile 148 and the formwork as shown in FIGS. 1, 2, 3, and 4 according to the height from the seabed to the highest water surface, the thickness of the soft ground, and the strength of the rock ground. The height of the piers 95 and the foundation space 151 manufactured by the 152 is determined.

The piers 95 are divided into piers 95 exposed from the bottom of the sea floor and the base space 151 buried below the bottom of the sea as shown in FIGS. 5 and 6, but are integrally formed.

Inside the pier 95, two to three cylindrical central pile spaces 148a and one to a plurality of entrance spaces 149 are installed as shown in FIGS. 5 and 7 in consideration of load and rigidity. It can be manufactured in a cylindrical or square pillar shape.

The foundation space wall 151a is a structure in which the pier 95 is placed on the ground and serves as the formwork 152 of the pier foundation, and is connected to the pier 95 to increase safety by increasing the width of the outer wall. 5 and 6 are made to be thick to withstand the pressure of the soft ground, such as the pier (95), and the inner wall is narrow the cross-section of the bottom and the top wide to facilitate the formwork (152) separation, The steel bit 154 is attached to the bottom surface of the foundation space wall 151a to penetrate the soft ground 157 as well as the weak rock by the load of the piers 95 and the impact of the hammer.

When manufacturing the piers 95, the upper part and the base space 151 to protrude some reinforcement to connect to the reinforced concrete work, and to put the concrete upright or to stand up as shown in Figure 4 to facilitate the separation of the foundation space formwork into concrete Forming, before moving to the installation site, the reinforcing bar to be entered into the base space 151 is temporarily fixed to the protruding reinforcing bars, and after the pier is completely settled to bind.

5 and 6, the diameter is 1/2 to 2/3 of the width of the piers so that two to three central piles 148 embedded in the rock can support the load of the piers 95 and maintain the vertical state And adjust the length to reach the height of 2/3 of the piers.

When the soft ground 157 is too deep and the foundation space wall 151a does not reach the rock, a small pile 32 is embedded around the central pile 148 as shown in FIG. 5 so that the upper part is buried in concrete filling the foundation space 151. When the soft ground 157 is thin or rocky, the pile cannot be driven so that the central pile 148 is embedded more than 3 to 4 meters deep.

Since there is almost no play between the central pile 148 and the central pile space 148a of the piers, if an error occurs because it is not perpendicular to the exact position, the base space 151 cannot be seated at the target position. If the file installation is difficult, you may choose to put one of the central pile 148 first, and then insert the pier 95 to settle the correct position on the ground, and then to put the remaining central pile 148.

When the foundation space 151 is empty, water may penetrate by water pressure. Therefore, the waterproof curtain 158 is attached to the outer wall of the pier 95 and the pier is lowered to the ground. To prevent them.

When the pier 95 is correctly assembled to the central pile 148, the steel bits 154 attached under the wall of the foundation space 151 dig into the soft ground 157, and the water and soil trapped in the foundation space 151 As it may come up and overflow into the access space 149 and the central pile space 148a, the dredging pump removes the soil from the foundation space 151 so that the pier 95 is placed on the rock and a part of the steel bit 154 is a rock. When hanging on to remove the seat and then assemble the reinforcement and fill the base space 151 and access space 149 with concrete.

When the aberration foundation 103 is constructed between the piers 95 at the tidal power plant construction, after closing and draining both hydrographs 76, the reinforced concrete is poured or the aberration foundation 103 produced on the ground is assembled to pile 32. Fill the space with the soil removed through the drilled holes at regular intervals and fill it with concrete.

As it is difficult to adjust the height of the pier by the installation work on the pier 95 as above, the pier 95 extends to the installation height of the top plates 124a and 160, and the road top plate 124a and the tidal power plant manufactured on the ground. In this case, after assembling the power plant top plate 160 composed of lifting ports, the remaining work is finished on the top plate.

In the construction of bridge construction as well as tidal power plant piers or floating buildings, all construction costs such as digging up to tens of times the foundation area with temporary barriers and excavating to rock are reduced and construction period is significantly shortened.

16; Aberration 24; Aberration 32; file
44; Salvaged 53; Bolt nut 76; water gate
82; Workspace 87; Tower crane orbit 95; pier
103; Aberration basis 116; Water frame 118; Assistant
120; Tower crane 121; Water pump 122; Pumping channel
122a; Vertical positive channel 123; Sluice groove 123a; Waterwheel home
124; Road 124a; Road tops 145; Stand
146; Crossbar 147; Inner circular frame 148; Central file
148a; Central filespace 149; Access space 150; Assembly line
151; Foundation space (pier foundation) 151a; Foundation space wall 152; Formwork
152a; Inner wall formwork 152b; Outer wall formwork 154; Steel bits
155; Handrail 156; Rock foundation 157; Soft ground
158; Waterproof curtain 159; Emergency exit 160; Power plant tops

Claims

According to the design completed by the geological survey data, the piers 95 are seated on the rock along the central pile 148 that is made from the ground to the rock beforehand to fix the rock. Underwater piers construction method characterized in that the work is assembled to the pier.
The method according to claim 1,
The outer wall formwork 152b of the pier 95 is integrally assembled from the base space 151 to the top of the pier to manufacture the pier 95, and the plurality of central pile spaces 148a are entered into and inside the pier 95. The pier upper part 95 which comprises the space 149,
The outer wall is widened to make the jaw or the same width as the pier 95, the cross section of the inner wall of the base space is narrow and the upper part is wide, and the steel bit 154 is attached to the bottom of the base wall 151a. Underwater pier construction method, characterized in that composed of a base space (151).
The method according to claim 1,
The diameter of the central pile 148 may pass through the central pile space 148a with almost no play, and the upper portion may rise more than two-thirds of the height of the piers 95 while the lower portion is embedded in the rock. Underwater pier construction method characterized in that the central pile (148) of a possible length.
Place all of the central pile 148 into the pier precisely perpendicularly to the design position using GPS and fit the central pile space 148a of the pier 95 into the central pile 148 to sit on the sea bed;
First, one center pile 148 is put into each pier and the pier 95 is fitted to sit on the ground, and the remaining center pile 148 is driven to maintain a vertical state.
After attaching the waterproof curtain 158 to the outer wall of the piers 95 and seating the piers 95 to the ground, the waterproof curtain 158 is pressed with earth and sand to form a waterproof membrane.
Remove the earth and sand in the foundation space 151 until the rock came out to sit down the steel bit 154 to the rock, and after assembling the foundation cushion reinforcement part of the access space 151 from the foundation space 151 or Underwater pier construction method characterized in that the filling to the upper part with concrete.
Close both hydrographs 76 to remove the soft ground 157 and build the aberration foundation 103 with reinforced concrete, or assemble the aberration foundation 103 made from the ground between the piers 95 to pile 32 Fixed,
Underwater pier construction method characterized in that the road top plate (124a) and the power plant structure top plate (160) manufactured on the ground is assembled on the top of the pier (95) to finish the remaining work on the top plate.