KR20090001890U - Concrete mould for concrete piles cast in position and its construction method - Google Patents

Abstract

The present invention relates to a field casting method, and more particularly to a formwork for the field placing pile and a field placing method using the same. The present invention includes an inner casing 21 formed of a hollow tube and an auxiliary casing 23 provided on an outer surface of the inner casing 21 and forming a connection portion with an adjacent pile. According to the present invention, even after performing a number of on-site casting methods, only the auxiliary casing can be replaced and the inner casing can be recycled, thereby reducing construction costs, and since the inner casing has a circular cross section, concrete site pouring can be performed smoothly. There is an advantage that can form a durable and made pile.

Description

Concrete mold for concrete piles cast in position and its construction method

The present invention relates to a field casting method, and more particularly to a formwork for the field placing pile and a field placing method using the same.

The CIP method is to install reinforced concrete columns in the field, install casings through the pillar installation holes, install reinforcing bars inside the casing, and fill the mortar with cement, gravel, sand, etc., and solidify the casing. It releases, but it inserts H file into pillar which is located at predetermined intervals. However, the CIP method has a problem in that leakage occurs because the pillar and the pillar are not sealed.

Recently, in order to solve the above problem, as shown in FIGS. 1A to 1D, one side of each casing 11 is cut in the longitudinal direction, and both sides of the edge surface are welded while the inner and outer surfaces of the incision surface 13 are inverted. By inserting the casing with the internal contact surface (17) formed in the casing installation hole, the installation method has been developed so that the internal contact surface 17 is directed in the direction of travel.

However, the prior art as described above has the following problems.

That is, when using a casing in which both inner edge surfaces are welded and the inner contact surface 17 is formed by inverting the inner and outer surfaces of the cut surface 13, the welding part 15 may be worn. There was a problem that the entire casing could not be used.

In addition, in the process of releasing the casing, there is a problem in that durability between the concrete pile pillar and the pillar is not good because concrete is not attached to the welded portion and the inner circumferential surface of the casing.

The present invention is devised to solve the conventional problems as described above, the object of the present invention is that the site of the internal casing can be recycled even if the welded portion of the auxiliary casing wears after performing a number of times the field casting method It is to provide a formwork for pouring piles and a site casting method using the same.

Another object of the present invention, for the cast-in-place pile that can solve the problem of poor durability of the concrete piles that may occur due to the concrete is not attached to the inner surface of the casing in the process of releasing the casing using a cylindrical casing It is to provide a formwork and a method of pouring the site using the same.

According to a feature of the present invention for achieving the object as described above, the present invention includes an inner casing formed of a hollow tube, and an auxiliary casing provided on one outer side of the inner casing and forming a connection portion with adjacent piles. It is configured by.

In this case, the auxiliary casing may be configured to include a pair of side portions extending to the side of the inner casing, and a connecting portion formed in a curved surface to connect the end of the side portion and contact the adjacent pile.

The pair of side portions may be formed such that a distance between the inner end portions in contact with the inner casing is longer than a distance between the outer ends.

On the other hand, the present invention is formed of an inner casing formed of a hollow tube, an auxiliary casing provided on an outer surface of the inner casing and forming a connection portion with an adjacent pile, and a hollow tube in which the inner casing and the auxiliary casing are inscribed. It may be configured to include an outer casing.

In this case, the auxiliary casing may be configured to include a pair of side portions extending to the side of the inner casing, the connection portion is formed in a curved surface to connect the end of the side portion, and to contact the adjacent pile.

In addition, the junction of the auxiliary casing may be formed to have the same radius of curvature as the curvature of the outer casing.

The side portion may be formed to have a length such that the inner surface of the junction portion is in contact with the outer circumference of the inner casing.

In this case, the pair of side portions may be formed such that the distance between the inner ends in contact with the inner casing is longer than the distance between the outer ends.

On the other hand, the present invention (a) drilling the ground using a perforator, inserting the outer casing, (b) installing the formwork for the site-placed piles in the interior of the installed outer casing, (c) the outer casing It may include the steps of drawing out, (d) pouring concrete into the inner casing, (e) retracting the formwork for the field-pouring pile, and replenishing the concrete in the inner casing.

At this time, before the step of placing concrete in the inner casing, it may include a step of compacting the ground around the formwork for the site-placement pile.

After the step (e), the steps (a) to (e) may be repeatedly performed on the ground connected to the concrete pile.

On the other hand, the present invention (a) drilling the ground using a perforator, inserting the outer casing, (b) installing the formwork for the site-placed piles in the interior of the installed outer casing, (c) the outer casing (D) inserting the outer casing while drilling the ground using a perforator to contact the junction of the auxiliary casing, and (e) installing the formwork for the site-placement pile inside the installed outer casing. Step, (f) withdrawing the outer casing, (g) repeating the steps (d) to (f) to continuously install the formwork for piles in the field, (h) inside the inner casing Comprising the step of pouring concrete, (i) while retrieving the plurality of pre-installed formwork pile piles, the step of replenishing the concrete inside the inner casing.

At this time, before the step of placing concrete in the inner casing, it may include a step of compacting the ground around the formwork for the site-placement pile.

And step (i) may be performed at the same time for a plurality of pre-installed piles for the field pile.

In addition, the step (i) may be performed sequentially with respect to the plurality of pre-installed pile piles.

According to the present invention formwork pile pile formwork and the field casting method using the same, the following effects can be expected.

That is, even after performing a number of on-site casting methods, only the auxiliary casing forming a connection portion with the adjacent pile can be replaced and the inner casing can be recycled, thereby reducing the construction cost than when the entire casing needs to be replaced.

In addition, according to the present invention, since the cross section of the inner casing is circular, it is possible to form a more durable pile by preventing the obstacle of the concrete site-pouring method that may occur due to the concrete not attached to the inner surface of the casing. have.

1a to 1c is a plan view showing the configuration of a formwork for a conventional cast-in-place pile.

Figure 2 is a perspective view showing the configuration of the formwork for the conventional site-pouring pile.

Figure 3 is a perspective view showing the configuration of the formwork for the field-pouring pile according to a specific embodiment of the present invention.

Figure 4a to 4c is a plan view showing the configuration of the formwork for the formwork pile pile according to a specific embodiment of the present invention.

5a to 5f are plan views sequentially illustrating the step of continuously installing the formwork for the field-pouring pile constituting a specific embodiment of the present invention.

Figure 6a to 6e is a perspective view sequentially showing the step of replenishing the auxiliary casing portion by drawing the formwork for the field-pouring pile forming a specific embodiment of the present invention by a predetermined height.

Figure 7 is a plan view showing a state in which the formwork for installing the pile in the field according to the embodiment of the present invention to construct a wall having an angle. Explanation of symbols on the main parts of the drawings

11: casing 13: incision side

15: welded part 17: internal crushed surface

21: inner casing 23: auxiliary casing

25: Formwork pile formwork 27: Joint of auxiliary casing

29: side portion of the auxiliary casing 31: outer casing

33: Formwork unit for cast-in-place piles

Hereinafter will be described in detail with reference to the accompanying drawings, preferred embodiments of the formwork for the field-pouring pile according to the present invention as described above and the site-pouring method using the same.

4a to 4c is an inner casing constituting a specific embodiment of the present invention, the auxiliary casing is provided on the outer surface of the inner casing and forms a connection portion with the adjacent pile, and the inner casing and the auxiliary casing are provided It is a top view showing the formwork for site-casting piles.

As shown in Fig. 4A, the inner casing 21 is formed of a hollow tube having a circular cross section. And as shown in Figure 4b the auxiliary casing 23 is provided in the longitudinal direction on the outer surface of the inner casing 21 to form a connection portion with the adjacent pile. In addition, as shown in FIG. 4c, the formwork pile formwork 25 according to the present invention includes the inner casing 21 and the auxiliary casing 23.

At this time, the auxiliary casing 23 is composed of a connecting portion 27 and a pair of side portions 29, as shown in Figure 4b. The junction 27 has the same radius of curvature as the outer casing 31 to be inserted in the adjacent position. Therefore, the connecting portion 27 of the auxiliary casing 23 can be formed by cutting the outer casing 31 in the longitudinal direction. On the other hand, the pair of side portion 29 is formed as part of the auxiliary casing 23 together with the connecting portion 27 extends to the side of the inner casing 21 and the inner casing 21 and It serves to connect the connection portion 27. At this time, the side portion 29 may be coupled to the inner casing 21 by various coupling methods, but is preferably connected by welding for easy field work. In addition, the pair of side portions may be formed such that the distance between the inner end portions in contact with the inner casing 21 is longer than the distance between the outer ends.

The outer casing 31 is formed of a hollow tube in which the inner casing 21 and the auxiliary casing 23 are inscribed. The site-pouring pile formwork 25 is composed of the inner casing 21 and the auxiliary casing 23, the site-casting pile formwork unit 33 is the inner casing 21 and the auxiliary casing 23. And the outer casing 31.

On the other hand, the auxiliary casing 23 may be provided so that the inner surface of the connecting portion 27 is in contact with the outer periphery of the inner casing (21). This is to pour concrete only in the inner casing 21, so that the concrete is easily filled in the empty space created by drawing the formwork pile 25 for pre-installed on-site placing piles. That is, by reducing the volume of the empty space generated by the portion of the auxiliary casing 23 of the drawn-in-place pile pile 25 to facilitate the on-site casting of concrete to the empty space, the pre-installed on-site pile This is to reduce the amount of concrete to be replenished while drawing the formwork (25).

In addition, the auxiliary casing 23 is composed of the connecting portion 27 and a pair of side portions 29, the pair of side portions 29 has a distance between the inner end in contact with the inner casing 21 It may be formed to be longer than the distance between the outer ends. This is the concrete that is being poured inside the inner casing 21 to compensate for the empty space created by the secondary casing 23 portion of the pulled out formwork pile formwork 25, the site of concrete to the empty space This is to make it smooth. That is, because the distance between the inner end in contact with the inner casing 21 is formed to be longer than the distance between the outer end, it is because the replenishment of the concrete to the empty space can be made easily and quickly.

5A to 5F are plan views sequentially illustrating a step of continuously installing the formwork pile formwork pile 25 according to a specific embodiment of the present invention.

As shown in Figure 5a, the outer casing 31 is installed in the casing mounting hole. Next, as shown in Figure 5b, the formwork for the site-pouring piles 25 is installed in the outer casing (31). At this time, the formwork pile formwork 25 can be installed to be inscribed in the outer casing (31). This is so that when the outer casing 31 is pulled out, the volume of the empty space is made as small as possible so that the surrounding soil can be in close contact with the formwork pile 25 for site casting. However, the site-casting pile formwork 25 is installed in the outer casing 31 as much as possible internally, it is preferable to install a little space so that the outer casing 31 is drawn out in a later step. .

Subsequently, as illustrated in FIG. 5C, the pre-installed outer casing 31 is taken out. Next, as shown in FIG. 5D, the casing is installed to be in contact with the connection portion 27 of the auxiliary casing of the site-casting pile formwork 25, and the outer casing 31 is installed therein. . Subsequently, as shown in FIG. 5E, the formwork for the site placing pile 25 is installed in the outer casing 31. Next, as illustrated in FIG. 5F, the pre-installed outer casing 31 is taken out.

Hereinafter, the process of forming a pile by pouring concrete inside the inner casing will be described in detail.

6A to 6E sequentially take out the formwork pile pile according to a specific embodiment of the present invention to replenish the empty space generated by the withdrawal of the auxiliary casing portion of the concrete placed inside the inner casing; It is a perspective view shown.

First, although not shown in the drawings, the outer casing 31 is inserted while drilling the ground at the position where the pile is to be formed, and the formwork pile 25 for the site-pouring pile is installed inside the outer casing 31. Next, when the external casing 31 is removed, only the formwork pile formwork 25 is installed as illustrated in FIG. 6A. At this time, by digging the ground around the installed site-placed pile formwork 25, the earth and sand surrounding the supplementary empty space caused by the withdrawal of the outer casing 31 to replenish the earth and sand for the site-placed pile (25) It can be in close contact with the. Subsequently, although not shown in the drawings, concrete is poured into the inner casing 21 of the formwork pile 25 for site-installed piles.

In this case, various fillers such as plain concrete, reinforced concrete, solidified soil (soil cement), cement paste, sheet pile and H pile may be poured into the inner casing 21. At this time, the type of the filling is appropriately selected depending on the use of the pile, the supporting load. Hereinafter, for convenience of description, a case in which concrete is poured will be described as an example.

Next, as shown in Figure 6b, the concrete is poured and after the predetermined time the formwork pile formwork for the pile 25 is taken out by a predetermined height. FIG. 6B is a view showing a state immediately after drawing out the formwork pile formwork 25. Therefore, the concrete of a portion below a predetermined height from which the formwork pile formwork 25 is drawn out still shows the shape of a cylinder.

As shown in FIG. 6C, the empty space created by the part of the auxiliary casing 27 of the formwork pile formwork 25 is drawn out of concrete. Thus, the withdrawal of the formwork pile formwork 25 should be made before the cast concrete is completely solid.

Next, as shown in FIG. 6d, the formwork pile formwork 25 is withdrawn again by a predetermined height. FIG. 6D is a view showing a state immediately after drawing out the formwork pile formwork pile 25 again to a predetermined height as in FIG. 6B. Thus, the concrete just below the formwork pile formwork for the site 25 is still in the form of a cylinder.

Then, as shown in Fig. 6E, the concrete fills the empty space created by the auxiliary casing 27 withdrawn by the predetermined height. By repeating the above steps, the concrete placed inside the inner casing 21 fills not only the inner casing 21 portion but also the auxiliary casing 23 portion in which the concrete is not poured. Therefore, the pile can be made to have the same shape as the formwork pile 25 for the site-pouring pile.

At this time, the concrete consumed to replenish the portion of the auxiliary casing 27 can be replenished by further pouring concrete into the inner casing 21 during the repetition of the step.

Referring to Figure 5a to 6e, the method of placing the continuous concrete pile using the formwork 25 for the site-pouring pile is configured by the following steps.

First, the outer casing 31 is inserted while drilling the ground using a perforator. Subsequently, the formwork pile formwork 25 is installed in the outer casing 31. At this time, the auxiliary casing 23 may be installed so that the adjacent pile is in contact with the formwork for the field placing pile 25 so as to face the traveling direction of the pile construction.

Next, the outer casing 31 is taken out, and the outer casing 31 is installed in an adjacent ground through a casing installation hole having the same radius of curvature as the junction 27 of the auxiliary casing. Subsequently, the auxiliary casing 23 is installed in the external casing 31 so that the auxiliary casing 23 faces the traveling direction of the pile construction.

Next, by repeating the same method as described above to continuously install the formwork pile formwork for the site 25, and if the number of site-formation pile formwork 25 is installed a predetermined number, the concrete is placed inside the inner casing (21). do.

Finally, the concrete is additionally poured into the inner casing 21 while drawing out the plurality of site-casting pile forms 25 after a predetermined time. At this time, the reason for adding concrete is that the concrete inside the inner casing 21 to compensate for the empty space by the auxiliary casing (23).

On the other hand, while drawing out the plurality of site-casting pile formwork (25) to add concrete to the inner casing 21 and the concrete to replenish the empty space is the plurality of site-casting pile formwork (25) ) May be performed simultaneously or may be performed sequentially.

Figure 7 is a plan view showing a state in which the formwork for the field-pouring pile according to a specific embodiment of the present invention to install a wall having an angle.

Insert the outer casing 31 while drilling the ground, as described in the method of placing the continuous concrete pile using the formwork for the site (25) for the site-pouring pile, and for the field-pouring pile inside the outer casing (31) When the formwork 25 is installed so that the auxiliary casing 23 faces the traveling direction of the construction of the pile, and the drawing of the outer casing 31 is repeated, the formwork pile formwork 25 is illustrated in FIG. 7. As shown, it is possible to install the formwork for the field-pouring pile for the construction of a wall having an angle of the 'b' shape. At this time, the length of the junction portion should be appropriately determined according to the direction in which the pile is to be formed.

Hereinafter, the case in which the pile is formed to have a right angle will be described as an example.

If the length of the cross section of the connection part 27 is not less than 1/4 of the circumference of the inner casing 21 cross section, the formwork pile formwork 25 for the site-pouring pile has a '-' shape as shown in FIG. 7. Cannot be a vertically bent shape. Therefore, if the traveling direction of the pile construction is a vertically bent shape of the 'b' shape should be provided so that the length of the cross section of the connection portion 27 is less than 1/4 of the circumference of the inner casing 21 cross-section.

Similar to the salpin bar, it is necessary to determine that the length of the cross section of the connection part 27 is equal to or less than a predetermined ratio of the circumference of the cross section of the inner casing 21 in order to install the formwork for the site placing pile for constructing the wall bent at a specific angle. have.

The rights of the present invention are not limited to the embodiments described above, but are defined by what is stated in the claims, and those skilled in the art can make various modifications and adaptations within the scope of the rights described in the claims. It is self-evident.

The present invention relates to a field pouring method, and more particularly, to a formwork for the field pouring pile and a field pouring method using the same, according to the present invention, after only a number of times the field casting method is performed, only the auxiliary casing is replaced and the inner casing It can be recycled to reduce the construction cost, and since the inner casing has a circular cross section, the concrete site casting is made smoothly and has the advantage of forming a durable pile.

Claims (4)

An inner casing formed of a hollow tube; An auxiliary casing provided on an outer surface of the inner casing and forming a connection portion with an adjacent pile; And And an outer casing formed of a hollow tube of a size in which the inner casing and the auxiliary casing are inscribed: The auxiliary casing, A pair of side portions extending from a side of the inner casing; Forming unit for field-pouring piles, characterized in that it comprises a connecting portion which is connected to the end of the side portion, is formed in a curved surface in contact with the adjacent pile. The method of claim 1, The junction of the auxiliary casing, Forming unit for a site-pouring pile, characterized in that formed to have a radius of curvature equal to the curvature of the outer casing. The method of claim 2, The side portion, Forming unit for the site-pouring piles, characterized in that the inner surface of the junction portion is formed in a length to contact the outer periphery of the inner casing. The method of claim 3, wherein The pair of side parts, Forming unit for the site-pouring piles, characterized in that the distance between the inner end in contact with the inner casing is longer than the distance between the outer end.