KR100859647B1 - Pre-trimming device and method for pile head of cast-in-place concrete pile - Google Patents

Abstract

A pre-trimming device for a head of a cast-in-place concrete pile and a method thereof are provided to remove concrete and foreign matter before curing by opening a lower plate. A pre-trimming device for a head of a cast-in-place concrete pile comprises an upper plate, a lower plate(12), and a body(13) of a pipe shape. Through holes(18) for main reinforcing bars are formed at the upper and lower plates. A trammy pipe passing pipe is formed at both upper and lower plates. An inlet is formed at the lower plate to let concrete and foreign matters enter when pouring the concrete. A shutoff valve is fixed to the bottom end of a shutoff valve rod(26) and opens and shuts off the inlet. A rod support cap(28) is fixed to the bottom of the upper plate to prevent the shutoff valve from moving out of the inlet. First and second fixing parts(23,24) are integrated with the shutoff valve to fix a lever(22). A level checking hole(16) and a check hole cap(17) are installed at the upper plate so that worker can check the level of the concrete or the foreign matters. A lower plate holder(30) is installed at the bottom of the lower plate to open the lower plate.

Description

Pre-trimming device and method for pile head of cast-in-place concrete pile}

1 is a perspective view of the head cleaning device of the poured concrete piles as an embodiment on the present invention

Figure 2 is a cross-sectional view showing the operating state of the head cleaning device of the cast-in-place concrete piles as an embodiment on the present invention

Figure 3 is an explanatory view of the excavation state schematically showing the underground excavation state by the hammer grab during the site-cast concrete pile construction

Figures 4a to 4c is a diagram illustrating the operation of the arrangement and method for arranging the head of the cast-in-place concrete pile as an embodiment of the present invention in order

<Brief description of symbols for the main parts of the drawings>

1. Casing 2. Rebar mesh

2'. Cast steel 3. Lowering fixing device

3 '. Climbing prevention device 10. Tofu cleaning device

11.Top Plate 12.Bottom Board

13. Body 14. Inlet

15. Tram tube through pipe 16. Concrete rise height check

17. Concrete Height Checking Hole Cap 18. Cast Steel Through Hole

19. Hinge 20. Opening and closing

21. Opening and Closing Case 22. Lever

23. 1st fixture 24. 2nd fixture

25. Slit groove 26. Valve valve rod

27. Opening and closing valve 28. Rod support cap

30. Bottom plate hanger 31. Bottom plate hanger

32. Bottom Plate Groove T. Tram tube

G. Concrete G '. Concrete and impurities

R. Lifting hook C. Crane
D. Lifting device E. Hammer grab
P. Concrete Piles

The present invention relates to an apparatus and method for arranging tofu of cast-in-place concrete piles.

In general, in the case of cast-in-place concrete piles, a casing oscillator or a casing rotator is used to press-install the casing in the ground by a conventional method and to use a hammer grab in the casing. Excavate soil excavation in the ground to form a space, insert casing to the required depth continuously, clean the inside of it, insert the reinforcing bar, and cast concrete using the tram tube.

However, after the concrete is cured by pouring concrete, it takes a lot of manpower, equipment and time to break the cured concrete and impurities up to the reference level by using the mechanical breaker to clean the tofu at the top of the concrete pile or by using manpower. This method was very difficult and uneconomical.

As described above, the present invention provides a tofu cleanup device and method for easily arranging the tofu cleanup of the cast-in-place concrete piles to a reference level in a short time and easily removing the concrete and impurities that rise from the device when the concrete is poured. There is a purpose.

Hereinafter, the present invention will be described as an embodiment with reference to the drawings in more detail.

1 is a perspective view of the head cleaning device of the cast-in-place concrete piles as an embodiment of the present invention, Figure 2 is a cross-sectional view showing the operating state of the head cleaning apparatus of the cast-in-place concrete piles as an embodiment of the present invention, Figure 3 Excavation state explanatory diagram schematically showing the state of underground excavation by the hammer grab (E) during the pouring concrete pile construction, Figure 4a to Figure 4c is the embodiment of the head to the concrete in the field cast concrete piles and method in order This is a job description shown in a book.

The head cleaning device 10 of the site-pouring concrete pile P according to the present invention will be described as an embodiment with reference to FIGS. 2 and 4 below.

The head cleaning device 10 of the present invention cast concrete pile (P) is provided with an upper plate 11 and a lower plate 12 and a pipe-shaped body 13, the upper plate 11 and the lower plate 12 is cast iron A through hole 18 through which 2 ′ is allowed to pass is formed, and a tram tube through pipe 15 through which the tram tube T passes through the upper plate 11 and the lower plate 12 is provided. do. The lower plate 12 forms an inlet 14 through which concrete and impurities (G ′) can be introduced when placing concrete (G), and an on / off valve (27) for opening and closing the inlet (14) It is provided at the lower end of the rod 26, the rod support cap 28 through the on-off valve rod 26 so that the on-off valve 27 does not shift when opening and closing the inlet 14 from the top plate 11 to the arrangement device (10) 1, which can be fixed to the upper plate 11 by bolting toward the space portion, and the rod support cap 28 can fix the lever 22 integrally formed at the upper end of the opening / closing valve rod 26. Secondary fixing parts 23 and 24 are provided. In addition, the upper plate 11 is provided with a rising height checking sphere 16 to check the level of the concrete and impurities (G ') and a rising height checking sphere cap 17 covering the checking sphere 16, the The lower plate hanger 30 is formed at one end of the lower plate 12 to open the lower plate 12. A hinge 19 is formed at the other end of the lower plate hanger 30.
Hereinafter will be described step-by-step method for placing concrete pile head curd of the present invention.

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First, in order to construct the site-cast concrete pile (P), as shown in Fig. 4a (I) in the ground, press-installed the casing 1 in the ground and excavated and removed the soil inside the casing (1), this casing (1) to install the reinforcing bar (2), and at this time, after installing the reinforcing bar (2), after confirming the reference level to the head to lay the concrete (G), install the fixing device (3) to prevent falling (Fig. 4a (II)) );

Next, using the crane (C) in the position of the head clearance reference level to install the head clearance device (10) of the site-cast concrete pile (P) to match the upper tofu clearance reference level (2) (Fig. 4a (III)) Installing a plurality of anti-rise fixing devices 3 'in order to prevent the head cleaning device 10 from rising due to its buoyancy when placing concrete G (Fig. 4B (I));

Next, when the concrete (G) is poured continuously by using the throttle tube (T) in the casing (1), the concrete (G) rises, the concrete and impurities (to the inlet 14 of the lower end of the head cleaning device 10) G ') is introduced into the tofu clean device (10) (Fig. 4b (II));

Next, when a predetermined amount of concrete and impurities (G ′) is filled in the tofu cleanup device 10 (Fig. 4b (III)), the casing 1 and the trap tube (T) Drawing to complete the concrete (G) pouring (FIG. 4C (I));

Next, the plurality of anti-risk fixing device (3 ') is removed, and closed by the inlet (14) opening and closing valve (18) after the head (C) and the lifting linkage (R) to the head cleaning device (10) Lifting up vertically to disassemble (FIG. 4C (II));

Finally, after the concrete (G) casting is completed, after removing the head cleaning device 10, the concrete pile P head surface is chipped after a predetermined time so that it can be connected and attached to the upper structure of the next step. Finishing (Fig. 4C (III));

Is made of.

1 and 2 will be described in detail with respect to the inflow of concrete and impurities (G ′) and the drawing of the tofu cleanup device 10 to the inside of the tofu cleanup device 10 as described above.

1 and 2, as described above, the concrete and impurities G ′ introduced into the inlet 14 below the head cleaning device 10 of the cast-in-place concrete pile P are disposed in the head cleaning device 10. After confirming that the filling level is filled to the predetermined level with the raising height confirming tool 17, the secondary fixing device is connected to the lever 22 supported by the primary fixing tool 23 of the rod support cap 28 through the slit groove 25. After moving to 24, the on / off valve rod 26 integrated with the lever 22 is lowered from the space in the head cleaning device 10 to move the inlet 14 into the on / off valve rod 26. By closing the opening and closing valve 27 is mounted on the bottom to prevent the concrete and impurities (G ') introduced into the inlet 14 when lifting the head cleaning device (10).
Then, the towing device 10 is lifted to the crane (C) by the lifting connection ring (R) out, the lower plate hanger device 31 of the lower plate hanger 30 attached to the lower plate hanger When rotated in accordance with the groove 32, the hinge 19 at the other end of the lower plate hanger 30 is rotated to open the lower plate 12, so that the concrete and impurities (G ') in the interior of the head cleaning device (10) ) To be removed.

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By removing the concrete and impurities flowing into the head cleaning device during the concrete pouring of the cast-in-place concrete pile before curing by the present invention, it is possible to reduce the air and expenses by immediately removing the curd after the concrete is cured. As well as the saving effect, there is an effect of preventing the reinforcement net from rising by the concrete buoyancy during the concrete placing by applying a weight of the head restraint device to the upper part of the reinforcement net during concrete placing.

Claims (2)

In the site-cast concrete pile tofu cleanup method, In order to install the predetermined site-cast concrete pile (P) by pressing and installing the casing (1) in the ground in a conventional manner and excavating and removing the soil inside the casing (1) to form an underground space portion; The reinforcing casing (1) is installed in the excavated casing (1), and at this time, after installing the reinforcing steel net (2), after confirming the reference level to lay the head to install the concrete (G) and installing the fixing device (3) for preventing falling ; When the tofu cleanup device 10 installs the tofu cleanup device 10 of the concrete pile in accordance with the upper reference level of the reinforcing steel network 2 using the crane (C) at the tofu cleanup reference level, Installing a lift preventing device (3 ') to prevent the head cleaning device (10) from rising due to its buoyancy; When the concrete G rises by continuously pouring concrete G into the casing 1, concrete and impurities G ′ are introduced into the inlet 14 of the tofu cleanup device 10. Entering into the interior; When a predetermined amount of concrete and impurities (G ') is filled in the tofu cleanup device 10, the casing (1) and the trap tube (T) is drawn to cast concrete (G). Completing; After removing the lift preventing device 3 'and closing the inlet 14 with the opening / closing valve 27, the head cleaning device 10 is vertically held by the crane C and the lifting linkage R. Lifting up and dismantling; Chipping the upper surface of the cured concrete pile (P) by the completion of the concrete (G) finishing to finish the connection with the upper structure of the next step to be well attached; Tofu cleaning method of large diameter cast-in-place concrete piles, characterized in that consisting of In the head cleaning device of the cast-in-place concrete pile, The head arranging device 10 is provided with an upper plate 11, a lower plate 12, and a pipe-shaped body 13, and the upper plate 11 and the lower plate 12 have a main reinforcing bar 2 'of the reinforcing bar network 2'. The cast iron through-hole 18 through which the through) is formed, and provided with a tram tube through pipe 15 through which the tram tube T can pass through the upper plate 11 and the lower plate 12. The lower plate 12 forms an inlet 14 through which concrete and impurities (G ′) can be introduced when placing concrete (G), and an on / off valve (27) for opening and closing the inlet (14) It is provided at the lower end of the rod 26, the rod support cap 28 through the on-off valve rod 26 so that the on-off valve 27 does not shift when opening and closing the inlet 14 from the top plate 11 to the arrangement device The lever 22 which is fixed to the upper plate 11 by bolting toward the space portion and is integral with the upper end of the on / off valve rod 26 is fixed to the rod support cap 28. The primary and secondary fixing parts 23 and 24 are provided, and the upper plate 11 has an ascending height confirming port 16 capable of confirming the position of the concrete impurity G 'and checking the ascending height. Elevation height confirmation sphere cap 17 is provided to cover the sphere 16, the lower plate hanger 30 is formed at one end of the lower plate 12 to open the lower plate 12, the lower plate hanger ( 30) The other end of the large-diameter on-site casting concrete pile tofu arrangement device, characterized in that the hinge (19) is formed.

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