WO2012138058A1

WO2012138058A1 - Method for forming a cast-in-place concrete pile using a mold case

Info

Publication number: WO2012138058A1
Application number: PCT/KR2012/001477
Authority: WO
Inventors: 이승수
Original assignee: (주)하경엔지니어링
Priority date: 2011-04-04
Filing date: 2012-02-28
Publication date: 2012-10-11
Also published as: KR101105853B1

Abstract

The present invention relates to a method for forming a cast-in-place concrete pile using a mold case. According to the method, after a rebar net is protected by a mold case, the mold case in which the concrete is poured is inserted into a pile bore hole to prevent the assembled rebar net from being deformed. Also, since the mold case is vibrated while being pulled out after the concrete has been poured and formed into the mold case, the concrete may be easily formed, material separation does not occur, and the shape of the concrete pile may be wholly maintained. Also, since light impacts are applied after the mold case is inserted and only the mold case is pulled out after a lower base plate is separated, slime on the front end may be easily addressed.

Description

丄

【Specification】

[Name of invention]

Construction method of cast-in-place concrete pile using mold case

Technical Field

The present invention relates to cast-in-place concrete piles, and more specifically, construction of cast-in-place concrete piles using a mold case inserted into a pile drilling hole after concrete is poured. It is about a method. Background Art

Typically, piles refer to structures that are used to transfer insufficient support to deep grounds of high strength when mounting structures in soft grounds. These piles can be divided into steel piles, ready-made concrete piles and cast-in-place concrete piles, depending on the material of the body.

Specifically, the steel pile is to use a steel pipe or H-shaped steel produced in the factory as a pile, it is constructed by the purchase after driving or pre-excavation. In addition, ready-made concrete piles are made of RCX Reinforced Concrete piles made in the field or Prestressed Concrete piles or Prestressed Spun High strength Concrete piles produced in the factory. Most of them are high strength PHC piles. In the same way, it is constructed by purchase after driving or digging. In addition, cast-in-place concrete pile refers to a method of inserting reinforcing steel mesh after excavating the inside, and then pouring concrete to form a pile.

The use of ready-made product piles and cast-in-place concrete piles, such as steel piles and ready-made concrete piles, is determined by the size of large sections. Particularly, since the cast concrete and cast-in-place concrete piles are to be placed in the ground after drilling the ground, As there is a problem that quality control and reinforcing steel reinforcement and concrete casting are difficult, for example, small and medium diameters under Φ700ηιηι are made of ready-made piles, but steel piles and ready-made concrete piles are Since it is expensive or difficult to produce, most of them are constructed with cast-in-place piles.

In the case of such a ready-made pile, it is possible to drive or final strike, easy to secure quality, easy to construct, and the end slime treatment by the final strike. However, these ready-made product piles cause civil complaints due to vibration / noise at the time of driving or final hitting, and there is a problem in that waste materials are generated due to the occurrence of excess parts by tofu clearance. In addition, such a ready-made pile is a joint when the pile length is more than 15m Necessary, there is a risk of deformation or breakage during pile transportation and hitting. In addition, it is necessary to inject cement milk between the pile and the excavation surface to secure the frictional force of the main surface during the construction of the embedded pile.

The cast-in-place concrete pile is a concrete made by drilling a pile hole to a predetermined depth by using an excavator at a predetermined position of the ground at the site instead of drilling a pre-made concrete pile, and then placing reinforcing bars into the concrete. Say the stakes.

In the case of the cast-in-place concrete piles, there is little vibration / noise during construction, so there is little cause of complaints, no need to clean up the head, no waste materials are generated, and no pile joining process and no head reinforcing process are needed. In addition, since the cast-in-place concrete pile is directly formed on the site, there is no deformation and damage caused by transportation, and also, it is easy to cope with the load by changing the concrete strength, the amount and strength of the reinforcing bar.

However, when the cast-in-place concrete pile according to the prior art, when inserting the reinforcing bar directly into the drilling hole and pours concrete, the following construction problems occur. For example, since the drilling diameter is large, the construction cost is expensive because a large drilling equipment is required, and quality control is difficult and construction cost is increased when the rebar network is manufactured on site. In addition, it is necessary to pay attention to easy deformation when the rebar network is inserted, there is a disadvantage that if the amount of the reinforcement is large amount of material interference may occur when placing concrete. In addition, there is a disadvantage that the tip portion slime treatment is difficult, and the effect on the tip bearing capacity is large depending on the degree of treatment.

[Detailed Description of the Invention]

[Technical problem]

The technical problem to be solved by the present invention for solving the above-mentioned problems, by inserting the reinforcing bar in the mold case on the ground and cast concrete concrete mold case that can be easily applied on-site casting concrete pile even under medium diameter It is to provide a method of constructing a cast-in-place concrete pile.

Another technical problem to be achieved by the present invention is to prevent the deformation of the assembled reinforcing bars by inserting a mold case in which the hardened concrete is poured into the pile hole after protecting the reinforcing nets with a mold case. The purpose is to provide a method for constructing cast-in-place concrete piles using a case.

Another technical problem to be achieved by the present invention, by placing and inserting the hardened concrete into the mold case and drawing the mold case while giving a vibration, It is to provide a method for constructing concrete piles by using a mold case, which is easy to cast and does not cause material separation and keeps the shape of the concrete pile intact.

Another technical problem to be achieved by the present invention is to cast concrete mold, and put the mold case after removing the lower base plate to remove the mold case, the cast-in-place concrete pile using the mold case to easily handle the slime of the end of the line It is to provide a construction method.

Technical Solution

As a means for achieving the above-described technical problem, the site-casting concrete pile construction method using a mold case according to the present invention, the reinforcing bar network and the concrete is inserted into the pre-fabricated mold case on the ground to fill the reinforcing bar and The mold case formed of hard concrete is inserted into the perforated hole of the ground, and the mold casing is drawn to form the cast-in-place concrete pile by the integrated reinforcing bar and concrete.

In this case, before drawing the inserted mold case, the remaining slim is pressed or removed to be seated to the support ground to secure tip support, and then the mold case is drawn to form a cast-in-place concrete pile. . On the other hand, as another means for achieving the above-described technical problem, the construction method of cast-in-place concrete pile using a mold case according to the present invention, a) inserting the assembled reinforcing bar in the mold case; b) connecting a base plate to the mold case tip; c) pouring concrete into the mold case to form a mold case in which concrete is not cast; d) drilling a pile drilling hole in the ground, and inserting the mold case in which the concrete is poured into the pile drilling hole; e) fixing the concrete case in which the concrete is poured into the support ground by a hit using a pile driving; _g ) separating the mold case and the base plate; And h) drawing only the mold case while vibrating using the pile driving and forming a concrete pile.

Here, in step e), the mold case may be squeezed and removed by slicing the mold case, and the tip support force may be secured by entering the support ground. Here, the step b) may be connected to the base plate is integrated with the mold case front end using a tension member.

Here, the step b) is the base plate is the mole using a shear key It can be connected in one piece with the case end.

On the other hand, as another means for achieving the above-described technical problem, in-site casting concrete pile construction method using the mold case and the tension material according to the present invention, a) preparing a mold case formed with the tension member fixing part carried in to the site ; b) assembling a reinforcing bar network and inserting the assembled reinforcing bar network into the mold case; c) connecting a base plate to the mold case tip and inserting a tension member; d) tensioning and fixing the tension member inserted from the base plate to the tension fixing unit; e) pouring concrete not hardened on the mold case to form a mold case in which concrete is poured; f) drilling a pile drilling hole in the ground, and inserting the concrete-casting mold case into the pile drilling hole; g) seating the mold case on which the concrete is poured by the hitting using pile driving to the support ground; h) dismounting the tension member to separate the mold case and the base plate; And i) drawing concrete mold by drawing only the mold case while vibrating using the pile driving.

The method of constructing the cast-in-place concrete pile using the mold case and the tension member according to the present invention may further include the step of cutting the elongated protruding portion of the ground to complete the cast-in-place concrete pile.

Here, the tension member of step d) is fixed to the tension member fixing unit formed on the upper part of the mold case, the mold case, the base plate and the tension member are integrated to support the load of the concrete until the tension member fixing unit is dismantled. You can do it.

Here, the step g) may be mounted on the support ground the front end of the mold case in which the concrete is poured while pressing and removing the slime remaining in the pile hole.

Here, the mold case of step a) is characterized in that the concrete inlet, the reinforcement spacer and the tension fixing unit in the steel pipe case.

Here, the reinforcing bar network is located in the center by the concrete spacer attached to the inside of the steel pipe case in step b). .

Here, in step c), the base plate is aligned with the lower groove of the mold case, a steel rod or steel wire tension member is inserted, and in step c), the base plate and the mold case are separated seamlessly. It is done. Here, the step e) is concrete installed at a predetermined interval in the mold case Injecting concrete into the inlet, the concrete inlet is characterized by finishing with an inlet cover.

On the other hand, as another means for achieving the above-described technical problem, the method of building a cast-in-place concrete pile using a mold case and a shear key according to the present invention, a) preparing a mold case and bringing it to the site; b) assembling a reinforcing bar network and inserting the assembled reinforcing bar network into the mold case; c) connecting a base plate provided with a shear key to a distal end of the mold case; d) pouring concrete not hardened on the mold case to form a mold case in which concrete is poured; e) drilling a pile drilling hole in the ground, and inserting the mold case in which the concrete is poured into the pile drilling hole; f) seating the concrete casted concrete case on the support ground by smashing using pile driving; g) separating the mold case and the base plate by destroying the shear key by the hit using the pile driving; And h) drawing only the mold case while vibrating using the pile driving to form a cast-in-place concrete pile.

Here, in step c), the shear key is manufactured together with the base plate, and the mold case and the base plate are integrated by making a groove for supporting the shear key at the bottom of the mold case. It is characterized by preventing the pouring of concrete inside the mold case.

Here, in step g), the shear key formed on the base plate is destroyed by beating at a load more than the shear key can resist, and the mold case is separated from the base plate.

Advantageous Effects

According to the present invention, since the reinforcing bar is inserted into the mold case on the ground and the concrete is poured, the problem of reinforcing the reinforcing bar network due to the mold case is protected even in the small and medium diameter of Φ700 or less, and the concrete hole can be solved. Even under light conditions, cast-in-place concrete piles can be easily applied.

According to the present invention, by placing the concrete by protecting the reinforcing bar with a mold case, and then inserting the molded case in which the concrete is poured into the pile hole, the deformation of the assembled reinforcing bar does not occur.

According to the present invention, it is easy to maintain the shape of the intact concrete piles because the material separation of the concrete does not occur because it simply draws the mold case while placing and inserting the concrete into the mold case on the ground and giving vibration. According to the present invention, since the mold case is drawn after the mold case is inserted and the lower base plate is separated, only the mold case is drawn out, and thus it is easy to process the slicing of the tip portion like the embedded pile.

[Brief Description of Drawings]

1 is a flowchart illustrating a method of constructing a cast-in-place concrete pile using a mold case and a tension member according to a first embodiment of the present invention.

2A to 2K are views illustrating a process of constructing a cast-in-place concrete pile using a mold case and a tension member according to the first embodiment of the present invention.

3 is a view showing a mold case of a cast-in-place concrete pile using a mold case and a tension member according to the first embodiment of the present invention.

4 is a view showing a fixing state after the tension of the cast-in-place concrete pile using the mold case and the tension material according to the first embodiment of the present invention.

5 is a flowchart illustrating a method of constructing a concrete pouring site using a mold case and a shear key according to a second embodiment of the present invention.

6 is a view showing a mold case of the cast-in-place concrete pile using a mold case and a shear key according to a second embodiment of the present invention.

7 is a view showing a fixing state of the cast-in-place concrete pile using a mold case and a shear key according to a second embodiment of the present invention.

8 is a view for explaining the removal of the shear key of the cast-in-place concrete pile using the mold case and the shear key according to the second embodiment of the present invention.

Explanation of Reference Codes

110, 210 ： Mold Case

111: Steel Pipe Case

112 ： Concrete spacer

113 ： Concrete Inlet

114 ： tension member fixing part

115: inlet cover

116 ： welding

120, 220 ： Assembled rebar network

121: cast iron

122 ： Band rebar

130, 230 ： Base plate 140 ： Tension material (steel bar or steel wire)

240 ： Shear key

150, 250 ： Poured concrete

160, 260 ： Drive Bracket

300 ： Pile driving

400: ground

410 ： Pile drilling hole

[Best form for implementation of the invention]

In-site casting concrete pile construction method using a mold case according to an embodiment of the present invention, inserting reinforcing steel mesh into the steel pipe or other similar mold case from the ground, and casts the solid concrete, thereafter, the whole hole through the mold case After inserting it in, the mold case is pulled out to form a concrete pile.

Specifically, in-situ concrete pile construction method using a mold case according to an embodiment of the present invention, inserting the reinforcing bar network assembled in the mold case, connecting the base plate to the mold case front end, in the mold case By casting concrete that is not solid, forming a mold case in which concrete is poured, perforating pile drilling holes in the ground, inserting the mold case in which the concrete is poured into pile drilling holes, A mold case in which concrete is poured is seated on the ground, and the mold case and the base plate are separated, and then the mold case is drawn out while vibrating using the pile driving. Here, the mold case is to squeeze and remove the slime (slime), to secure the tip support by seating on the support ground.

In addition, as the mold case and the base plate fixing and detaching method, since the mold case and the base plate must be removed after the mold case is inserted into the ground by placing the mold case, the mold case and the base plate must be removed. According to the method of fixing and separating, two methods of using tension material and using shear key are applied. That is, the base plate may be connected to be integrated with the mold case tip by using the tension member. Alternatively, the base plate may be connected to the mold case front end portion by using the shear key.

[Form for implementation of invention]

Hereinafter, with reference to the accompanying drawings, those of ordinary skill in the art Embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

^• Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

Hereinafter, referring to FIGS. 1 to 4, a method of constructing a cast-in-place concrete pile using a mold case and a tension member according to a first embodiment of the present invention will be described. Referring to FIGS. 5 to 8, the present invention It will be described for the construction method of the cast-in-place concrete pile using the mold case and the shear key according to the second embodiment.

1 is a flowchart illustrating a method of constructing a concrete pouring site using a mold case and a tension member according to a first embodiment of the present invention, and FIGS. 2A to 2K illustrate a mold case and a tension member according to a first embodiment of the present invention. Drawings showing the construction process of cast-in-place concrete piles.

1, 2A to 2K, the cast-in-place concrete pile construction method using the mold case and the tension material according to an embodiment of the present invention, first, prepare a mold case 110 and bring it to the site (S101). Specifically, as shown in Figure 2a, the construction site after processing the concrete inlet 113, the reinforcing spacer 112 and the tension fixing unit 114, etc. in the case 111 of the steel pipe or similar material Bring in The mold case 110 may include a steel pipe case 111, a reinforcing spacer 112, a concrete inlet 113, a tension member fixing part 114, an inlet cover 115, a welding part 116, and the like. This will be described later with reference to FIG. 4.

Next, the reinforcing bar 120 is assembled (S102). Specifically, as shown in Figure 2b, after confirming the drilling depth of the cast-in-place concrete piles, the reinforcing bar 121 and the band reinforcing bars 122 are assembled to prepare a rebar network.

Next, the assembled reinforcing bar 120 is inserted into the mold case 110 (S103). Specifically, as shown in FIG. 2C, the reinforcing steel mesh 120 is inserted into the prepared mold case 110. In this case, the reinforcing steel mesh is mounted by the concrete spacer 112 attached to the inside of the steel pipe case 111. 120 is centered.

Next, the base folate 130 is connected and the tension member 140 is inserted. (S104). Specifically, as shown in Figure 2d ^' , the base plate 130 to be installed on the tip portion of the cast-in-place concrete pile is aligned with the lower groove of the mold case 110, and the tension member 140 of the steel rod or steel wire is inserted . At this time, the base plate 130 and the mold case 110 is in a separated state without a separate seamless.

Next, the tension member 140 inserted from the base plate 130 to the tension member fixing unit 114 is tensioned (S105). Specifically, as shown in Figure 2e, by tensioning the tension member 140, which is a steel rod, the tip base plate 130 and the mold case 110 of the cast-in-place concrete pile is pressed, the tension member 140 is the mold By fixing the tension member fixing unit 114 formed on the upper part of the case 110, the mold case 110, the base folate 130 and the tension member 140 are integrally formed until the tension member fixing unit 114 is dismantled. By doing so, it supports the load of the subsequently poured internal concrete 150. Next, the concrete 150 is poured into the mold case 110, and the mold case 110 in which the concrete is poured is prepared to be inserted into the pile drilling hole (S106). Specifically, as shown in FIG. 2F, the concrete 150 is introduced into the concrete inlet 113 installed at a predetermined interval in the mold case 110, and the concrete inlet 113 is the inlet cover 115. By finishing, the mold case 110 in which the concrete is poured is ready to be inserted into the pile drilling hole.

Next, the pile drilling hole 410 is drilled to remove slime (S107). Specifically, as shown in Figure 2g, by using the pile driving 300 to drill the pile hole 410 on the ground 400, to remove the slime generated during the drilling.

Next, the mold case 110 in which the concrete is poured is inserted into the pile drilling hole 410 (S108). Specifically, as shown in FIG. 2H, some slime remains in the pile boring hole 410 formed in the ground 400, and the mold case 110 in which concrete is poured using the pile driving machine 300 is formed. Insert into the pile drilling hole (410).

Next, the mold case 110 in which the concrete inserted into the ground 400 is poured is put on the supporting ground (S109). Specifically, as shown in FIG. 2i, by hitting the mold case 110 in which concrete is poured using the pile driving machine 300, while pressing and removing the remaining slime, the ground 400 is pressed into the ground 400. The front end of the mold case 110 in which the concrete is not cast is seated on the supporting ground. That is, the mold case 110 may be squeezed and removed by squeezing the mold case, and the tip support may be secured by entering the support ground. Here, the rudder is also called a direct rudder by hitting concrete piles, and the rudder is lightly after drilling with the pile rudder. Tell how you are hitting.

Next, the tension member 140 is dismantled and the mold case 110 is drawn out (S110). Specifically, as shown in Figure 2j, by dismantling the tension member fixing portion 114 of the upper portion of the tension member 140, after separating the mold case 110 and the base plate 130, the pile driving (300) Only the mold case 110 is drawn while giving a vibration.

Next, the protruding tension member 140 is cut (S111).

Specifically, as shown in Figure 2k, by cutting the tension member 140 protruding to the top of the ground 400, the cast-in-place concrete pile is completed by the integrated reinforcing bar mesh and concrete.

In-site casting concrete pile construction method using the mold case and the tension material according to the first embodiment of the present invention, when the mold case 110 is erected for insertion into the pile drilling hole 410 that the internal concrete 150 is poured out When the mold case 110 is inserted and struck, the base plate 130 is required under the mold case 110 in order to transfer the load to the ground to be seated to the support ground. . When the base plate 130 is struck, the mold case 110 is separated and the mold case 110 is drawn out so that the concrete 150 is poured into the pile drilling hole 410.

At this time, in the case of using the tension member, the tension member 140 of the steel rod or steel wire fixed to the base plate 130 slightly to the tension member fixing unit 114 of the upper part of the mold case 110 through the inside of the mold case 110. By tensioning and fixing, the mold case 110 and the base plate 130 which are separated independently are temporarily integrated.

Subsequently, the concrete case 150 is poured into the mold case 110 and inserted into the pile drilling hole 410, and then the batter is performed by using the pile driving machine 300. When it is seated on the supporting ground, the mold case 110 and the base plate 130 are separated from each other by dismantling the elongated fixing unit 114 of the upper part of the mold case 110. Then, the mold case By drawing only 110, the concrete pile can be formed.

3 is a view showing a mold case of a concrete pile using a mold case and a tension material according to a first embodiment of the present invention, Figure 4 is a site casting using a mold case and tension material according to a first embodiment of the present invention A diagram showing the settling state after the tension of the concrete pile. 3, the mold case 110 of the cast-in-place concrete pile using the mold case and the tension material according to the first embodiment of the present invention, the steel pipe case 111, reinforcing spacer 112, concrete inlet ( 113, tension fixing unit 114, inlet cover 115, and weld 116.

Steel pipe case 111 has a plurality of concrete inlet 113 is formed on the outer circumferential surface, the reinforcement spacer 112 is formed on the inside, the tension member fixing portion 114 is formed on the upper end.

In addition, as shown in the cross section taken along the AA line of Figure 3, the steel pipe case 111 is formed with a reinforcement spacer 112 to be welded, the concrete is introduced through the concrete penetration 113 After that, the concrete inlet 113 is finished through the inlet cover 115. Afterwards, a mold case in which concrete was poured

110 is inserted into the pile drilling hole.

On the other hand, Figure 4 is a view showing a fixing state after the tension of the cast-in-place concrete pile using the mold case and the tension material according to the first embodiment of the present invention.

Referring to FIG. 4, in the cast-in-place concrete pile using the mold case and the tension member according to the first embodiment, the mold case 110 in which the concrete is poured is inserted into the pile drilling hole.

Steel pipe case, as shown in the cross section taken along line A-A of FIG.

The concrete spacer 112 is coupled to the inside of the 111 by the welding part 116, and the reinforcing bar 120 is assembled with the main reinforcing bars 121 and the band reinforcing bars 122, and a steel rod, which is a tension member 140, is disposed at the center thereof. Inserted, and concrete 150 is poured into the mold case 110.

In addition, at the distal end of the mold case 110, as shown in the cross section taken along the line B—B of FIG. 4, a driving bracket 160 is formed on the side surface, and the driving bracket 160 is shown in FIG. It may be a shape as shown in the cross section which takes the FF line of 4 as an incision line. ^'

In addition, the base plate 130, as shown in the cross-sectional view of the OC line of Figure 4, the tension member fixing hole 131 is formed, wherein the base plate 130 is a steel plate or PC concrete Can be.

In addition, the tension member 140 is inserted from the base plate 130 to the tension member fixing unit 114 as shown in the cross section taken along the DD line of FIG. 4. In addition, the tension member 140 and the tension member fixing part 114 may be tightened in a tensioned state as shown in the cross-section of the EE line of FIG. 4, and subsequently the tension member. 140 is disassembled from the tension fixing unit 114, the base plate 130 and the mold case 110 can be separated.

Meanwhile, FIG. 5 is a flowchart illustrating a method of constructing a concrete pile using a mold case and a shear key according to a second embodiment of the present invention, and FIG. 6 illustrates a site using a mold case and a shear key according to a second embodiment of the present invention. FIG. 7 is a view illustrating a mold case of a cast concrete pile, and FIG. 7 is a view illustrating a fixing state of a cast-in-place concrete pile using a mold case and a shear key according to a second embodiment of the present invention.

5 to 7, the site casting concrete pile construction method using the mold case and the shear key according to the second embodiment of the present invention, the site using the mold case and the tension material according to the first embodiment of the present invention described above Since it is practically similar to the method of laying concrete piles, the description of the same parts will be omitted.

First, prepare a mold case 210 and bring it to the site (S201). That is, the concrete inlet 213, the reinforcement spacer 212, etc. in the steel pipe or similar case 211 is processed and brought into the construction site. Here, the mold case 210, as shown in Figs. 6 and 7, the steel pipe case 211, the reinforcing spacer 212, the concrete inlet 213, the inlet cover 215 and the weld 216 And the like. Compared with the first embodiment described above, the tension fixing unit 114 shown in FIG. 3 is not formed.

Next, assembling the reinforcing steel bar 220 consisting of cast steel and strip reinforcement (S202). In other words, after confirming the depth of drilling of the cast-in-place concrete pile, the reinforcing bar 221 and the band reinforcing bars 222 are assembled to prepare the reinforcing bar network.

Next, the assembled reinforcing bar 220 is inserted into the mold case 210 (S203).

That is, the reinforcing wire mesh 220 is inserted into the prepared mold case 210. At this time, the reinforcing steel mesh 220 is positioned at the center by the concrete spacer 212 attached to the inside of the steel pipe case 211. do .

Next, the base plate 230 provided with the shear key 240 is connected (S204). That is, the base plate 230 to be installed at the distal end of the site-cast concrete Malcook is connected to the mold case 210. At this time, the base plate 230 is provided with a shear key 240. Next, the concrete case 250 is poured into the mold case 210, and the mold case 210 in which the concrete is poured is prepared to be inserted into the pile drilling hole (S205). That is, the concrete case 250 is introduced into the concrete inlet 213 installed at predetermined intervals in the mold case 210, and the concrete inlet 213 is closed by the inlet cover 215, where the concrete case is poured into a mold case ( 210 is ready to be inserted into the pile drilling hole. Next, the pile drilling hole 410 is drilled and the slime is removed (S206). That is, using the pile driving machine 300 to drill the pile drilling hole 410 on the ground 400, and removes the slime generated during the drilling.

Next, the mold case 210 in which the hard concrete is poured is inserted into the pile drilling hole 410 (S207). That is, some of the slime remains in the Malkook hole 410 formed in the ground 400, and the mold case 210 in which concrete is poured is inserted into the pile hole 410 using the pile driving machine 300. .

Next, the concrete placing mold case 210 inserted into the ground 400 is struck and seated on the supporting ground (S208). That is, by hitting the mold case 210 in which the concrete is poured by using the pile driving machine 300, while pressing and removing the remaining slime, the tip portion of the mold case 210 in which the concrete is poured on the supporting ground is pressed. Settle down. At this time, the shear key 240 is broken by the load.

Next, the mold case 210 is pulled out (S209). Specifically, since the shear key 240 formed at the front end is broken by a smashing, and the mold case 210 and the base plate 230 are separated, the mold case 210 is vibrated using the pile driving device 300. ) Only the concrete casting is completed.

^In other words, in the cast-in-place concrete pile construction method using a mold case and a shear key according to the second embodiment of the present invention, the base plate 230 includes a shear key 240 using a brittle material such as concrete 7, the lower part of the mold case 210 forms a groove that can support the shear key 240 of the base plate 230, and the two materials are integrated together. Preventing the pouring of concrete 250 inside the mold case 210. Then, by inserting the concrete case in which the mold case 210 is poured into the punching hole, the bottom plate is transmitted to the ground 400 to squeeze or remove the slime so that the base plate is seated on the supporting ground. At this time, when the batting is performed using the pile driving machine 300, the shear key 240 is broken by the load while the base plate 230 and the mold case 210 are separated. As a result, only the mold case 210 can be pulled out, so that the cast-in-place concrete pile can be completed.

On the other hand, Figure 8 is a view for explaining the removal of the shear key of the cast-in-place concrete pile using the mold case and the shear key according to the second embodiment of the present invention, Figure 8a) is a state before the warp to remove the shear key 8, b) shows a state after the strike for removing the shear key. Referring to FIG. 8, in the method of removing a shear key of a cast-in-place concrete pile using a mold case and a shear key according to a second embodiment of the present invention, a mold case 210 in which concrete is poured using a pile driving machine 300 is used. When the mold case 210 is struck after being inserted into the pile boring hole, the load is transmitted to the shear key 240. At this time, when the shear key 240 strikes more than the load that can withstand, the shear key 240 is destroyed. As a result, the mold case 210 and the base plate 230 coupled to the shear key 240 are separated. In addition, such a struck load is transmitted to the base plate 230 by the driving bracket 260 attached to the bottom of the mold case 210, thereby compressing or removing the remaining slime, and thus the base plate 230 Can be seated on the supporting ground.

In the cast-in-place concrete pile method according to an embodiment of the present invention, instead of inserting the reinforcing bar directly into the pile drilling hole and placing concrete, the reinforcing bar is inserted into the steel pipe or other similar mold case on the ground and poured concrete. After that, the mold case is inserted into the punched hole as a whole, and after that, similarly to the embedded pile, the mold is inserted into the ground, and then only the mold case is drawn to form a concrete pile. According to the embodiment of the present invention, the ready-made product pile and the site-cast concrete pile can be provided with many advantages. ^'

In addition, according to an embodiment of the present invention, since the reinforcing bar is inserted into the mold case on the ground and the concrete is placed, the reinforcing bar is protected due to the mold case even in the small and medium diameter of Φ700 or less, the problem of placing concrete with a narrow hole diameter Since the solution can be solved, it is easy to apply the cast-in-place concrete pile even under the medium diameter.

In addition, according to an embodiment of the present invention, by placing the concrete by protecting the reinforcing bar with a mold case, and then inserting the mold case in which concrete is poured into the drill hole, the deformation of the assembled reinforcing bar does not occur.

In addition, according to an embodiment of the present invention, since the mold case is pulled out while vibrating after inserting and inserting concrete into the mold case, the construction difficulties caused by placing directly in the perforation hole and material separation of concrete do not occur and are intact. It is easy to maintain the shape of the concrete pile.

In addition, according to an embodiment of the present invention, since the mold case is drawn after the mold case is inserted and the lower base plate is separated, only the mold case is drawn, so that the slime treatment of the tip portion is easy as the embedded pile.

The foregoing description of the invention is intended to be illustrative, and in the art to which the invention pertains. Those skilled in the art can understand that the present invention can be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the present invention. Should be.

Claims

[Range of request]

[Claim 11

Insert the reinforcing bar mesh assembled in the mold case pre-fabricated on the ground, and fill the concrete and insert the mold case formed of the reinforcing bar net and the hard concrete into the perforated hole of the ground.

A method of constructing a cast-in-place concrete pile using a mold case, characterized in that to form the cast-in-place concrete pile by the reinforcing steel mesh and concrete by drawing only the mold case.

[Claim 2]

The method of claim 1,

Mold case, characterized in that before pressing the inserted mold case by pressing or removing the remaining slime to be seated to the support ground to secure the tip support force to draw only the mold case to form a cast-in-place concrete pile Construction Method of Cast-In-Place Concrete Piles Using.

[Claim 3]

In the method of constructing cast-in-place concrete piles,

a) inserting the assembled reinforcing bar into the mold case;

b) connecting a base plate to the mold case tip;

c) pouring concrete into the mold case to form a mold case in which concrete is not cast;

d) drilling a pile drilling hole in the ground, and inserting the mold case in which the concrete is poured into the pile drilling hole;

e) seating the mold case on which the concrete is poured by the hit using a pile driving to the support ground;

g) separating the mold case and the base plate; And h) forming the cast-in-place concrete pile by the integrated reinforcing bar network and concrete by drawing only the mold case while vibrating using the pile driving.

[Claim 4]

The method of claim 3

In the step e) by pressing the mold case, the slime (Sl ime) is crimped and removed, and seated to the support ground to secure the tip support force Construction Method of Cast-In Place Concrete Pile Using Mold Case.

[Claim 5]

The method of claim 3,

The step b) is a cast-in-place concrete pile construction method using a mold case, characterized in that the base hulate is connected to the mold casing end portion using a tension member.

[Claim 6]

The method of claim 3,

The step b) is the site-cast concrete pile construction method using a mold case, characterized in that the base plate is connected to the mold case to the end by using a shear key integrally.

[Claim 7]

In the method of constructing cast-in-place concrete piles,

a) preparing a mold case in which the tension fixing unit is formed, and bringing it into the field; b) assembling a reinforcing bar network and inserting the assembled reinforcing bar network into the mold case; c) connecting a base plate to the mold case tip and inserting a tension member;

d) lengthening the tension member inserted from the base plate to the tension member fixing unit;

e) pouring concrete to the mold case to form a mold case in which concrete is not hardened;

f) perforating pile boring holes in the ground, and inserting the mold case in which the concrete is poured into the pile boring hole;

g) seating a mold case on which the concrete is poured on the support ground by a hit using a pile driving;

h) dismounting the tension member to separate the mold case and the base plate; And

i) a cast-in-place concrete concrete cook construction method using a mold case and a tension material, comprising the step of forming the cast-in-place concrete pile by the integrated reinforcing bar and concrete by vibrating only the mold case by vibrating the pile driving.

[Claim 8]

The method of claim 7, j) A method for constructing a concrete casting site using a mold case and a tension material, further comprising cutting a tension member protruding to the upper portion of the ground to complete the cast-in-place concrete pile.

[Claim 9]

The method of claim 7,

The tension member of step d) is fixed to the tension member fixing part formed on the upper part of the mold case, so that the mold case, the base plate and the tension member are integrated until the tension member fixing part is dismantled to load the concrete. Construction method of cast-in-place concrete piles using a mold case and tension material characterized in that it supports.

[Claim 10]

The method of claim 7, wherein

In step g), the mold case and the tension member may be seated on the support ground while pressing and removing the slime remaining in the pile hole by pressing the mold case. Construction Method of Cast-In-Place Concrete Piles Using.

[Claim 11]

According to claim 17,

The mold case of the step a) is a concrete inlet, reinforcing spacers and the tension member fixing part is characterized in that the cast-in-place concrete pile construction method using the tension member characterized in that the processed steel pipe case.

[Claim 12]

The method according to claim 7,

Method of constructing concrete piles using the cast case and the tension member, characterized in that the reinforcing bar is located in the center by the concrete spacer attached to the inside of the steel pipe case in step b).

[Claim 13]

The method of claim 7,

Wherein the step c) the base plate to the lower groove of the mold case, the cast-in-place concrete pile construction method using a mold case and a long mounting material, characterized in that to insert a tension material of the steel bar or steel wire.

[Claim 14] The method of claim 13,

In the step c), the base plate and the mold case is a cast-in-place concrete pile construction method using the mold case and the tension member, characterized in that the separated state without a seamless.

[Claim 15]

The method of claim 7,

The step e) is to put the concrete into the concrete inlet installed at a predetermined interval in the mold case, the concrete inlet is a cast-in-place concrete pile construction method using a mold case and the tension material characterized in that the closing with the inlet cover.

[Claim 16]

In the method of constructing cast-in-place concrete piles,

a) preparing a mold case and bringing it to the site;

b) assembling a reinforcing bar network and inserting the assembled reinforcing bar network into the mold case; c) connecting a base plate provided with a shear key to a distal end of the mold case;

(1) pouring concrete into the mold case to form a mold case in which concrete is not hardened;

e) drilling a pile drilling hole in the ground, and inserting the mold case in which the concrete is poured into the pile drilling hole;

f) seating the mold case on which the concrete is poured on the supporting ground by the hitting using pile driving;

g) separating the mold case and the base pull rate by breaking the shear key by the hit using the pile driving; And

h) the cast-in-place concrete pile construction method using the mold case and the shear key comprising the step of forming the cast-in-place concrete pile by the integrated reinforcing bar network and concrete by vibrating only the mold case using the pile driving.

[Claim 17]

The method of claim 16,

In the step c), the shear key is manufactured together with the base plate, and the mold case and the base pull rate are integrated by forming and inserting a groove for supporting the shear key in the lower portion of the mold case. The mold case and the shear key are characterized in that to prevent the concrete from spilling inside the mold case. Construction Method of Cast-In-Place Concrete Piles.

[Claim 18]

The method of claim 16,

In step g) the shear key formed on the base plate is broken by the struck, and the mold case and the cast-in-place concrete pile construction method characterized in that the mold case is separated from the base plate.

[Claim 19]

The method of claim 16,

In step d), the concrete case is put into the concrete inlet installed at predetermined intervals in the mold case, and the concrete inlet is a cast-in-place concrete pile construction method using a mold case and a shear key. [Claim 20]

The method of claim 16,

In step f), the mold case and the cast-in-place concrete pile using the shear case are characterized by seating the front end of the mold case in which the concrete is poured on the support ground while pressing and removing the remaining slime by hitting the mold case. Construction method.