JP2015057527A - Water cutoff steel sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a water cutoff steel sheet pile for closing the outflow of underground water by complete sealing of a joint part of the steel sheet pile.SOLUTION: A bottom-sealed irregular-shaped steel pipe 3 is integrally joined to a vertical end part of the steel sheet pile 1, and the underground water and sediment are prevented from intruding into this irregular-shaped steel pipe 3 when driving this steel sheet pile 1 in the ground. A deep groove 5 in the longitudinal direction is provided on an outer surface of this irregular-shaped steel pipe 3, a thickness of its part is formed in an extremely thin thickness 6, and another one longitudinal directional shallow groove 7 is provided in parallel to it. After the thickness of its part is formed in an intermediate thin thickness 8, an extremely thin thickness part 6 is cut-opened by driving the lower end of a U-shaped part 9 of an end part of the next steel sheet pile in the vertical direction in the middle between the deep groove 5 and the shallow groove 7 of the irregular-shaped steel pipe 3 of the former steel sheet pile 1, the intermediate thin thickness part 8 is bent in the pipe, a pipe thickness is cut opened in the longitudinal direction, the U-shaped part 9 of the next steel sheet pile 8 bites in and descends here, both steel sheet piles are joined, a filling liquid is injected into the irregular-shaped steel pipe 3, and the clearance-sealed water cutoff steel sheet pile is formed.

Description

  It is intended to completely close the groundwater outflow with steel sheet piles.

  It is currently impossible to completely stop the outflow of groundwater by connecting a normal steel sheet pile, so it is possible to stop the water with a frozen soil wall. And the problem remains due to the installation cost.

  The outflow of groundwater is closed by sealing the seam of the steel sheet pile.

  A shaped steel pipe 3 having a bottom 4 sealed is joined to the vertical end portion of the water-stopping steel sheet pile 1 so as to be integrated, and when this steel sheet pile 1 is driven into the ground, groundwater and earth and sand enter the shaped steel pipe 3. And a deep groove 5 in the longitudinal direction is provided on the outer surface of the deformed steel pipe 3, and the thickness of the portion is made to be an extremely thin wall 6, and another shallow groove 7 in the longitudinal direction is provided in parallel therewith, After the steel sheet pile 1 is driven into the ground to a predetermined depth, the thickness of the portion is set to the middle thin wall 8 and then the next steel sheet pile 2 having the same shape is started to be driven.

  At this time, the ultrathin wall portion 6 is formed by driving the lower end 10 of the U-shaped portion 9 at the end of the next steel sheet pile 2 in the longitudinal direction between the deep groove 5 and the shallow groove 7 of the deformed steel pipe 3 of the previous steel sheet pile 1. The thin-walled portion 8 is bent into the tube, and the tube-wall is cut open in the longitudinal direction, where the U-shaped portion 9 of the next steel sheet pile 2 bites and descends. During this time, the steel sheet piles 1 and 2 are joined together with the groundwater and earth and sand intrusion into the space 12 inside the deformed steel pipe being substantially blocked, and the L-shaped part 11 of the U-shaped part 9 is located inside the deformed steel pipe. It is combined in a state in which it cannot escape from the space 12.

  Next, a filling liquid that hardens with time is injected into the space 12 inside the deformed steel pipe 3, and the space between the deformed steel pipe 3 and the U-shaped portion 9 of the steel sheet pile is completely sealed so that the inflow of groundwater can be blocked. To do.

  The outflow of groundwater can be prevented with the steel sheet pile for water stop of the present invention, and since a long steel sheet pile can be used, deep water veins can also be prevented.

As an example of an embodiment of the present invention, a cross-sectional view of a steel sheet pile for water stop Sectional view when the same-shaped steel sheet pile for water stop is connected to both ends of the steel sheet pile for water stop of FIG. As an example of the embodiment of the present invention, after the first steel sheet pile is driven and embedded, the front view when the next steel sheet pile is to be driven Front view when the steel pipe for filling liquid pumping is inserted after the next steel sheet pile of FIG.

  The deformed steel pipe 3 is attached integrally to the vertical end of the water-stopping steel sheet pile 1 by welding or the like. The bottom 4 of the deformed pipe 3 is sealed, so even when the steel sheet pile 1 is driven into the ground. Ground water and earth and sand do not enter the space 12 inside the deformed steel pipe, and a deep groove 5 in the longitudinal direction is provided on the outer surface of the deformed steel pipe 3 so that the thickness of the portion is an ultrathin wall 6. Another shallow groove 7 in the longitudinal direction is provided, and the thickness of the portion is set to a medium thin wall 8. After the steel sheet pile 1 is driven into the ground to a predetermined depth, the next steel sheet pile 2 of the same shape is provided. Start driving.

  Prior to this, the ultrathin portion 6 of the deformed steel pipe 3 is cut open several times, the middle thin portion 8 is bent slightly to the inside 12 of the pipe, and the lower end 10 of the U-shaped portion 9 at the end of the next steel sheet pile 2 is moved first. When the steel sheet pile 1 of the steel sheet pile 1 is driven vertically between the deep groove 5 and the shallow groove 7, the ultrathin wall portion 6 is cut open, and the medium thin wall portion 8 is bent into the tube. The U-shaped portion 9 of the next steel sheet pile 2 is cut and opened in the longitudinal direction, and the intrusion of nearby groundwater and earth and sand into the space 12 inside the deformed steel pipe is substantially prevented during this time. In the state, the steel sheet piles 1 and 2 are joined together, and the L-shaped part 11 of the U-shaped part 9 is joined in a state in which it cannot escape from the space 12 inside the deformed steel pipe. Since part 9 descends to the part opened in the longitudinal direction of deformed steel pipe 3, it is driven stably and deeply. It can be.

  Next, a filling liquid that hardens with time is injected into the space 12 inside the deformed steel pipe 3 so that the gap between the U-shaped portions 9 of the steel sheet piles of the deformed steel pipe 3 is completely sealed so that intrusion of groundwater can be blocked. To do.

A steel pipe 13 for filling liquid pressure feeding is installed in the space 12 inside the deformed steel pipe, and the filling liquid in the tank 15 placed above is passed through the steel pipe 13 for pressure feeding by pressing by the piston 16, vibration pressing or compression air pressure, It blows out into the deformed steel pipe 3 from the opening 14 at the bottom, and fills the internal space 12 from below.
As the filling liquid, mortar includes a time-curable synthetic resin, a foamable time-curable synthetic resin, and the like. It is necessary to extrude more, and it is desirable to sequentially pull up the steel pipe 13 as the liquid level rises. In addition, since the steel pipe 13 and the deformed steel pipe 3 are kept in close contact with each other, the steel pipe 13 can be magnetized.

DESCRIPTION OF SYMBOLS 1 ... First steel sheet pile 2 ... Next steel sheet pile 3 ... Deformed steel pipe 4 ... Bottom of deformed steel pipe 5 ... Deep groove of deformed steel pipe 6 ... Ultra thin wall part of deformed steel pipe 7. ··· Shallow groove of deformed steel pipe 8 · Medium and thin wall portion of deformed steel tube 9 · U-shaped portion of steel sheet pile 10 · Lower end 11 of U-shaped portion of steel sheet pile · · · U-shaped steel sheet pile L-shaped part 12 ... Space inside deformed steel pipe 13 ... Steel pipe for pressure feeding 14 ... Opening 15 at bottom of steel pipe for pressure feeding ... Tank for filling liquid 16 ... Piston 17 in tank ... ·Ground

Claims (2)

  In the structure of the steel sheet pile for water stop, a deformed steel pipe (3) with the bottom (4) sealed is joined to the vertical end portion of the steel sheet pile (1), and the steel sheet pile (1) is driven into the ground. Sometimes, groundwater and earth and sand are prevented from entering the deformed steel pipe (3), and a deep groove (5) in the longitudinal direction is provided on the outer surface of the deformed steel pipe (3) so that the thickness of the portion is extremely thin (6 In parallel with this, another shallow groove (7) in the longitudinal direction is provided, and the thickness of the portion is made thin (8). This steel sheet pile (1) is inserted into the ground at a predetermined depth. After that, the next steel sheet pile (2) of the same shape is started to be driven. At this time, the lower end (10) of the U-shaped part (9) at the end of the next steel sheet pile (2) is used as the previous steel sheet pile The ultrathin wall part (6) is cut open by driving vertically between the deep groove (5) and the shallow groove (7) of the deformed steel pipe (3) in (1), and the medium thin wall (8) is bent into the pipe, and the tube flesh is cut open in the longitudinal direction, where the U-shaped part (9) of the next steel sheet pile (2) bites and descends. Both steel sheet piles (1) and (2) are joined in the state where the infiltration of the groundwater and earth and sand in the vicinity of the inner space (12) of the steel pipe is substantially blocked, and the L-shaped part of the U-shaped part (9) (11) is in a state in which it cannot be escaped from the space (12) inside the deformed steel pipe, and then injected into the space (12) inside the deformed steel pipe (3), and a filling solution that hardens with time is injected, The structure of the steel sheet pile for water stop which sealed completely to the clearance gap between a deformed steel pipe (3) and the U-shaped part (9) of a steel sheet pile, and could interrupt | block inflow of groundwater.   In the structure of the steel sheet pile for water stop, the steel pipe (13) for filling liquid pressurization is installed in the space (12) inside the deformed steel pipe, and the filling liquid in the tank (15) installed above is supplied by the piston (16). By pressing, vibration pressing or compressed air pressure, it passes through the steel pipe for pressure feeding (13) and is ejected into the deformed steel pipe (3) from the opening (14) at the bottom, so that the internal space (12) is filled from below. Structure of steel sheet pile for water stop.

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