KR20210001058A - Cast-in-place pile and construction method thereof - Google Patents

Abstract

The present invention relates to a cast-in-place pile capable of reusing a tendon, and a construction method using the same. More specifically, the cast-in-place pile capable of reducing a tendon comprises a steel pipe casing (100), a slime introduction prevention means (200), and a rebar net member (300). The present invention increases durability of the pile.

Description

Cast-in-place pile and construction method thereof, and construction method using the same

The present invention relates to an on-site cast pile capable of recycling tension materials and a construction method using the same, and more specifically, a means for preventing slime inflow into the steel pipe casing so that impurities and slime do not flow into the steel pipe casing during pile construction. It relates to an on-site casting pile capable of recycling tension materials to maximize the strength and durability of the pile by ensuring the ease of fastening, concrete pouring work, and the strength of the concrete after curing, and a construction method using the same.

Pile refers to a structure used to deliver insufficient support to deep ground with high strength when mounting a structure on a soft ground.

In other words, it is a columnar structural member used to support a structure in soft ground.

As described above, piles are the basis of the construction industry, and various technologies related to conventional piles have been proposed,

In common, during pile construction, a perfect solution for treating impurities and slime that interferes with the strength of concrete has not been proposed.

Impurities and slime,

For example, when constructing a pile, water or a stabilizer solution is used to withstand the horizontal earth pressure acting in the drilling hole and into the drilling hole by the external underground water level.In this situation, water or a stabilizer solution, soil particles generated during excavation It is a thing that floats or is laid on the floor, or a stabilizer (polymer, bentonite) is aggregated and settled, and the soil particles contain clay particles, sand, silt, rock debris, etc. (When using the all-casing method) Edo, the hole must be filled with water above the level of the surrounding underground water level.)

Cast-in-place piles,

It refers to a concrete pile that is cured in the ground by first excavating the ground and then pouring concrete at the site.

It has a variety of diameters ranging from small diameter to large diameter (750mm~3000mm), and can be used in both unreinforced and reinforced concrete.

In addition, depending on the site conditions, a casing or lagging may be used to prevent the soil around the excavation hole from collapsing during construction.

In other words, when the depth of the support layer is deep and the scale of the upper structure is large, it is a high-strength pile construction method in which rebar net and concrete are poured after excavation on site

It refers to the construction through the process of drilling, casing installation, rebar net insertion, and concrete pouring.

However, during this process, it is necessary to remove impurities and slime generated,

Separately equipped wastewater treatment facility for the treatment of impurities, slime and stabilizer,

Be careful of ground contamination caused by the use of stabilizer,

Pay attention to the occurrence of rebar fantasy, etc.

In the conventional pile construction, various problems (cumbersome work, high difficulty of work, risk of work) occur due to impurities and slime.

Accordingly, an object of the present invention is to provide a cast-in-place pile and a construction method using the same for solving problems caused by impurities and slime.

Thus, as a prior art for the on-site casting pile that can recycle the tension material and the construction method using the same,

As shown in Fig. 7 (a), the "construction method of cast-in-place concrete piles using a mold case" (hereinafter referred to as'prior art 1') of Korean Patent Publication No. 10-1105853,

After inserting the reinforced reinforcing mesh into the mold case made in advance on the ground, filling the concrete, inserting it into the perforated hole of the pre-built ground and drawing out only the mold case to form a cast-in-place concrete pile. The present invention relates to a method of constructing a cast-in-place concrete pile using a mold case in which the cast-in-place concrete pile is formed by pulling out only the mold case after securing the tip support by placing it to the ground by squeezing or removing the remaining slime before drawing. .

In other words, by protecting the reinforcing bar network with a mold case and pouring concrete, the assembled reinforcing bar network does not deform by inserting the concrete-placed mold case into the pile drilling hole, and the concrete is poured and inserted into the mold case. By pulling out the mold case while giving vibration afterwards, it is easy to pour concrete, no material separation occurs, and the shape of the concrete pile is kept intact. In addition, after inserting the mold case, the lower base plate is removed. This is a technology for the construction method of concrete piles that easily treat the slime at the tip by drawing only the mold case later.

Another prior art is,

As shown in (b) of FIG. 7, in the "Construction method of cast-in-place concrete piles using a mold case and tremi pipe" (hereinafter referred to as'prior technology 2') of Korean Patent Publication No. 10-1314080. ,

By inserting the mold case produced by protecting the reinforcing bar with a case into the perforation hole, the assembled reinforcing bar network is not deformed, and after the concrete is poured and inserted into the mold case using a tremi tube installed on the rebar net. By pulling out the case while giving vibration, it is easy to pour concrete, no material separation occurs, and the shape of the concrete pile is kept intact. Also, after inserting the mold case, the precast lower base plate is removed. It relates to a method for constructing a cast-in-place concrete pile using a mold case and a tremi pipe, which facilitates treatment of the slime at the tip end by drawing the case later.

As described above, the prior art 1 to 2 are the same technical fields as the present invention, but the technical features related to the cast-in-place pile, in contrast to the present invention, the problem to be solved by the invention and the solution have.

For example, the prior art 1 to the prior art 2 related to the conventional poured pile-related technology,

Most of them are techniques for a construction method or a pouring method, and the problem of preventing the introduction of impurities and slime, which is a problem to be solved by the present invention, cannot be completely solved.

That is, prior art 1 to prior art 2 is a pile construction method, which does not completely prevent impurities and slime from flowing into the mold case in the first place, but minimizes the amount of inflow of impurities and slime It is only a description of a method for easy processing.

Accordingly, the present invention, in which the inflow of impurities and slime is prevented in advance, so that the treatment of impurities and slime is omitted, is a problem to be solved by the present invention only (object of the invention), It is intended to provide an on-site cast pile composed of technical features different from the prior art, including the prior art 1 to the prior art 2, with a solution means (element) for solving and the effect exhibited by solving the same.

Republic of Korea Patent Publication No. 10-1105853 (2012.01.06.) Republic of Korea Patent Publication No. 10-1314080 (2013.09.26.)

Accordingly, the present invention was conceived to solve the above-described conventional problem,

The purpose of the pile construction is to provide a cast-in-place pile that does not allow impurities and slime to flow into the steel pipe casing.

Another object of the present invention is to ensure that a part of the means for preventing the inflow of impurities and slime into the steel pipe casing is recycled, so that the effect of the durability of the pile and the economical efficiency of the construction cost is maximized, Its purpose is to provide cast-in-place piles.

The present invention for achieving the above object is conceived to achieve the problem to be solved,

In the on-site casting pile that can recycle the tension material and the construction method using the same,

On-site cast piles capable of recycling tension materials,

A steel pipe casing inserted into the excavated perforated hole;

Slime inflow prevention means for preventing the inflow of impurities and slime into the steel pipe casing which is in close contact with and bonded to the upper and lower ends of the steel pipe casing and inserted into the excavated perforated holes;

Consisting of; a reinforcing bar mesh member that is inserted into the steel pipe casing to improve the durability of the pile,

Slime inflow prevention means,

A lower plate part positioned and coupled to the lower end of the steel pipe casing to prevent impurities and slime from flowing into the steel pipe casing;

It is located and coupled to the upper end of the steel pipe casing facing the lower plate part based on the steel pipe casing, so that the lower plate part and the lower part of the steel pipe casing are in close contact with the operation of the tension member by the operator, and at the same time, the steel pipe casing An upper plate portion preventing impurities and slime from flowing into the interior;

An end portion is coupled to the lower plate portion, and the other end portion is coupled to the upper plate portion, and the lower plate portion rises with respect to the lower end portion of the steel pipe casing by an operator's operation, and a tension member portion to be in close contact with it;

During pile construction, impurities and slime are prevented from flowing into the steel pipe casing, so that the strength of the concrete poured into the steel pipe casing is secured, and the durability of the pile is maximized.

At this time, the tension member is detached from the lower plate portion to be recycled.

In addition, the construction method using cast-in-place piles capable of recycling tension materials,

Foundation excavation operation step of excavating a perforated hole into which the pile is to be inserted;

A pile insertion step of inserting the pile into the drilled hole;

A tension member separation step of separating the tension member coupled to the lower plate portion and removing it from the steel pipe casing;

A pouring step of pouring concrete into the steel pipe casing;

A curing step of maintaining adequate moisture until the concrete is completely hardened and protecting it from being impacted or frozen;

Consists of; a head trimming step of finishing the head of the pile inserted into the excavated perforated hole,

During pile construction, it is characterized in that the ease of work and safety are improved due to the simplification of field work.

On the other hand, prior to this specification, terms or words used in the claims for patent registration should not be construed as being limited to their usual or dictionary meanings, and the inventor has the concept of terms in order to explain his own invention in the best way. Based on the principle that can be appropriately defined, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, so various alternatives that can be substituted for them at the time of application It should be understood that there may be equivalents and variations.

According to the present invention as described above in the above configuration and operation,

During pile construction, impurities and slime do not flow into the steel pipe casing, maximizing the strength and durability of the pile.

In addition, a part of the means for preventing the inflow of impurities and slime into the steel pipe casing is recycled, thereby improving the economic efficiency of the pile construction.

More specifically,

The airtightness between the lower and lower plates of the steel pipe casing is improved through the upper and lower portions of the steel pipe casing, and the upper and lower plates are joined by the tension member to prevent the inflow of impurities and slime into the steel pipe casing. To prevent.

At this time, after inserting the steel pipe casing into the perforated hole, the tension member is separated from the lower plate and poured to ensure the pure strength of the concrete.

In other words, not only prevents impurities and slime flowing into the steel pipe casing through the slime inflow prevention means, but also impurities and slime, as well as any other substances other than the rebar network member The durability of the pile is maximized by making it purely cured without being mixed.

In addition, since the inflow of impurities and slime into the steel pipe casing is prevented in advance by the slime inflow prevention means, there is no need for a separate operation to remove impurities and slime. , Work efficiency, safety and stability are improved while the air is shortened.

In addition, due to the characteristics of the lower plate part, the contact area between the lower plate part and the ground is improved, and the lower play part and the steel pipe casing form a concentric circle, improving the positional stability and safety of the pile, and the pile that is the basis of the structure. It is a very effective invention to prevent the eccentric load of the pile due to the improvement of the durability of the pile.

In particular, in the field, after excavating the perforated hole, the pre-assembled pile is inserted, so that only the pouring work into the steel pipe casing is proceeded, so the ease of work is maximized due to the simplification of the field work.

This is directly connected to the improvement of the accuracy, safety and stability of the work.

In addition, by means of preventing the inflow of slime, design and construction are matched, so that perfect construction is achieved.

1 is a diagram showing the configuration of the present inventors cast piles that can recycle the tension material.
Figure 2 shows a schematic diagram of the present inventors can be recycled in situ cast piles.
Figure 3 is a schematic diagram of the slime inflow site means of the components of the present inventors in the site cast piles capable of recycling the tension material.
4 is a perspective view and a front view showing an embodiment of a lower plate portion and a tension member among the components of the present inventor's tension material recycling possible on-site pouring pile.
Figure 5 schematically shows a flow chart for the construction method using the present inventors can be recycled on-site piles of tension material.
Figure 6 is a simplified diagram showing an embodiment of the construction method using the present inventors cast-in-place piles capable of recycling the tension material.
Figure 7 shows a representative diagram of the prior art for the present inventors cast-in-place piles capable of recycling tension materials and a construction method using the same.

Hereinafter, with reference to the accompanying drawings will be described in detail the functions, configurations, and actions of the present inventors cast-in-place piles capable of recycling tension materials and a construction method using the same.

1 is a diagram showing the configuration of the present inventors on-site casting piles capable of recycling tension material, Figure 2 is a schematic diagram of the present inventors on-site casting piles capable of recycling tension materials, and Figure 3 is a view of the present inventors on-site casting piles capable of recycling tension materials Among the components, it shows a schematic diagram of the slime inflow prevention means.

1 to 3 the present invention,

In the cast-in-place pile (1) that can recycle the tension material,

Steel pipe casing 100 inserted into the excavated perforated hole;

Slime inflow prevention means 200 for preventing impurities and slime from flowing into the steel pipe casing 100, which is in close contact with and coupled to the upper and lower ends of the steel pipe casing 100 and inserted into the excavated perforated holes;

Consisting of; is inserted into the steel pipe casing 100, a reinforcing bar mesh member 300 to improve the durability of the pile,

Slime inflow prevention means 200,

A lower plate part 210 located at the lower end of the steel pipe casing 100 and coupled to prevent impurities and slime from flowing into the steel pipe casing 100;

Based on the steel pipe casing 100, the lower plate portion is positioned and coupled to the upper end of the steel pipe casing 100 that faces the lower plate portion 210, and the lower plate portion is operated by the operator of the tension member portion 300 An upper plate part 220 that prevents the inflow of impurities and slime into the inside of the steel pipe casing 100 while ensuring that 210 and the lower end of the steel pipe casing 100 are in close contact;

An end portion is coupled to the lower plate portion 210, the other end portion is coupled to the upper plate portion 220, and the lower plate portion 210 is raised based on the lower end of the steel pipe casing 100 by the operator's manipulation. Consisting of, the tension member 230 to be in close contact;

During pile construction, it is characterized by preventing impurities and slime from flowing into the steel pipe casing 100, securing the strength of concrete poured into the steel pipe casing 100, and maximizing the durability of the pile. .

That is, the present invention, as described above,

Through the slime inflow prevention means 200 that are respectively fastened and coupled to the lower and upper ends of the steel pipe casing 100, during pile construction (transfer and guarding of the piles at the work site, insertion process into the perforated hole), steel pipe casing 100 ) By preventing impurities and slime from flowing into the inside, by securing the strength of the concrete poured into the steel pipe casing 100, to improve and maintain the durability of the pile, in particular, impurities and sediment ( This is a technology for a slime inflow prevention means 200 that blocks the inflow of slime).

When explaining in more detail with reference to Figure 4 the slime inflow prevention means 200, which is a key component of the present invention,

The lower plate part 210,

A base plate 211 formed with a predetermined diameter and thickness so as to be in surface contact with the lower end of the steel pipe casing 100;

The base plate 211 is formed in a certain arrangement on one side with respect to the central axis, and a part of the assembled reinforcing bar network member 300 is inserted, the position of the reinforcing bar network member 300 is fixed, and the reinforcing bar network member due to concrete at the time of pouring Reinforcing bar network insertion hole 212 to prevent deformation of the 300;

A first tension recombination module 213 formed on the upper surface of the base plate 211 and protruding and formed on the same axis as the central axis of the base plate 211 so that the ends of the tension member 300 are coupled;

It is formed on the lower surface of the base plate 211, is formed in a certain arrangement based on the central axis of the base plate 211, when inserting the steel pipe casing 100 into the perforated hole, the lower surface of the base plate 211 and the ground By increasing the contact area of the ground position fixing bracket 214 to further improve the position fixing of the steel pipe casing 100;

It is formed on the upper surface of the base plate 211, is formed in a certain arrangement based on the central axis of the base plate 211, while facilitating the coupling of the base plate 211 and the lower end of the steel pipe casing 100, Consisting of; a steel pipe position auxiliary bracket 215 that assists so as not to shift the coupling position of the base plate 211 from the steel pipe casing 100,

To be easily positioned and coupled to the lower end of the steel pipe casing 100,

The upper plate part 220,

A tension stock information tank plate 221 formed with a predetermined diameter and thickness so as to be in surface contact with the upper end of the steel pipe casing 100, which is a position opposite to the lower plate part 210 based on the steel pipe casing 100;

A tension member insertion groove 222 formed on the central axis of the tension member plate 221 and penetrated so that the other end of the tension member 300 is inserted;

Doedoe formed on the upper surface of the tension stock information tank plate 221, protruding on the same axis as the central axis of the tension stock information tank plate 221, formed, the tension material portion 300 passing through the tension material insertion groove 222 Consists of; a second tension recombination module 223 to be coupled to the other end of the,

To be easily positioned and coupled to the upper end of the lower casing 100,

At this time, the second tension recombination module 223,

As a first embodiment ,

Either fixed to the upper surface of the tension stock information tank plate 221, (for example, formed in a completely fixed state by welding.)

As a second embodiment ,

Consisting of an element for lifting the other end of the tension member 300 protruding to the upper surface of the tension inventory information tank plate 221,

In the case of the first embodiment,

Rotating the tension member 230, the lower plate portion 210 is raised based on the lower end of the steel pipe casing 100,

In the case of the second embodiment,

The second tension recombination module 223 is rotated, and the lower plate part 210 is raised based on the lower end of the steel pipe casing 100.

In addition, the tension member 230,

A tension member 231 formed in a cylindrical shape of a predetermined length and rotated by an operator to be fastened to or separated from the lower plate portion 210 and the upper plate portion 220;

A first coupling module 232 formed from an end of the tension member 231 with a male screw for a predetermined section to be coupled with the first tension recombination module 213 of the lower plate part 210;

Consists of; a second coupling module 233 formed from the other end of the tension member 231 with a male screw for a certain section, and coupled with the second tension recombination module 223 of the upper plate part 220,

The end is fastened with one side of the lower plate part 210 located at the lower end of the steel pipe casing 100, and the other end is fastened with one side of the upper plate part 220 located at the upper end of the steel pipe casing 100. By rotation, the lower plate part 210 rises with respect to the lower end of the steel pipe casing 100, so that it is in close contact with the lower end of the steel pipe casing 100, so that between the lower end of the steel pipe casing 100 and the lower plate part 210 Airtightness is secured, and impurities and slime are prevented from entering.

At this time, the tension member 230 may be detached from the lower plate part 210 and recycled.

That is, the first tension recombination module 213, the second tension recombination module 223, and the first combination module 232 and the second combination module 233 are, for example, each of a DBDAC nut and a DBIDAC bolt. It is formed, so that assembly and disassembly are quick, and is configured to be easily reused several times, so that the tension member 230 can be recycled.

In addition, the tension member 230 itself is formed of a DBIDAC steel bar (tension material 231, the first coupling module 232, the second coupling module 233 is integrally formed as a single DBDAC steel rod), each lower It may be fastened to the first tension recombination module 213 of the plate part 210 and the second tension recombination module 223 of the upper plate part 220.

For reference, DBIDAC Kangbong,

Since the entire steel bar has a thread, it can be cut to the desired length, and the length of the steel bar can be extended using a coupler.

It is formed with a thick thread, so it is less deformed, and when used in the field, it has excellent applicability.

Because it is a relaxation steel bar, long-term loss is small,

The strength is high, so it is possible to manufacture a steel bar having a small diameter, which has the advantage of reducing the weight.

As described above, each of the components constituting the slime inflow prevention means 200 are organically combined with each other, and based on this, form an organic bonding relationship with the steel pipe casing 100, and impurities and impurities into the steel pipe casing 100 It prevents the inflow of slime.

In more detail, the method of fastening the slime inflow prevention means 200 and the steel pipe casing 100 will be described in more detail,

Using the steel pipe positioning auxiliary bracket 215, the base plate 211 is positioned at the correct position forming a concentric circle at the lower end of the steel pipe casing 100, and the first coupling module 232 to the first tension recombination module 213 After tightening, the tension stock information plate 221 is placed on the upper end of the steel pipe casing 100, and the other end of the tension member 231 passes through the tension member insertion groove 222 to the second tension recombination module 223 Is inserted, penetrated and protruded to the outside, and the base plate 211 is raised based on the lower end of the steel pipe casing 100 by rotating the tension member 231 or the second tension recombination module 223, and the steel pipe casing ( The airtightness is created between the lower end of 100) and the base plate 211.

Later, when the steel pipe casing 100 is inserted into the excavated perforation hole, the upper plate part 220 is separated from the upper end of the steel pipe casing 100, and the tension member 231 is rotated to rotate the tension member 231 from the lower plate part 210. After separating and pouring, the pure strength of concrete is ensured by curing without impurities and slime.

At this time, the reinforcing bar network member 300 inserted and positioned inside the steel pipe casing 100 through the reinforcing bar network insertion hole 212 is after the steel pipe casing 100 is inserted into the perforated hole in response to various construction sites and situations, or It may be coupled to the inside of the steel pipe casing 100 before being inserted into the perforated hole.

On the other hand, the construction method (2) using a cast-in-place pile capable of recycling tension materials,

As shown in Figures 5 to 6,

Foundation excavation operation step (S100) of excavating a perforated hole into which the pile is to be inserted;

Pile insertion step (S200) of inserting the pile into the drilled hole;

The tension member separation step (S300) of separating the tension member 230 coupled to the lower plate portion 210 and removing it from the steel pipe casing 100;

A pouring step (S400) of pouring concrete into the steel pipe casing 100;

A curing step (S500) of maintaining adequate moisture until the concrete is completely hardened and protecting it from receiving impact or freezing;

Consists of; a head trimming step (S600) of finishing the head of the pile inserted into the excavated perforation hole,

During pile construction, ease and safety of work should be improved due to the simplification of field work.

At this time, the pile insertion step (S200),

It is a step of inserting a pile prepared in advance by the operator,

The stakes prepared in advance by the operator,

A lower plate portion position fixing step of placing the lower plate portion 210 at the lower end of the steel pipe casing 100 (S210);

The first tension member coupling step (S220) of coupling the end of the tension member portion 230 to the lower plate portion 210 (S220);

Inserting the reinforced mesh member 300 into the inside of the steel pipe casing 100, a reinforcing mesh member preparation step (S230) of fixing to the lower plate portion 210;

Consists of; a second tension member coupling step (S240) of coupling the other end of the tension member portion 230 to the upper plate portion 220;

It can be inserted directly into the drilled hole excavated in the field.

In this way, when the present inventor is constructed using the cast-in-place pile 1 capable of recycling the tension material, as well as the ease of work, the resulting shortening of the air (工期), the safety and stability of the work is improved.

That is, the present invention is to prevent impurities and slime flowing into the steel pipe casing 100 in advance during pile construction.

For reference, when impurities and deposits (slime) flow into and remain inside the steel pipe casing 100 and are poured or cured,

① The tip bearing capacity decreases,

In other words, if the slime remains, the concrete is not fixed to the tip by the slime, so the tip bearing capacity decreases, and the impact increases as the length of the pile is shorter.

② The slime is rolled up into the concrete, reducing the quality and strength

That is, when slime remains in the steel pipe casing 100, it is rolled up into the concrete to be poured and partially deteriorates the quality and strength of the concrete.

③ There is a problem that the reinforced network member 300 is injured.

That is, during concrete pouring, when the slime is pushed to the concrete and rises, the reinforcing bar network member 300 is caused to rise because the resistance with the reinforcing bar network member 300 is large.

In order to overcome such problems of impurities and slime, conventionally, only various methods for removing impurities and slime have been proposed.

The present invention is to provide a solution to prevent impurities and slime from flowing into the steel pipe casing 100 in the first place, rather than another construction method or an improved construction method as in the prior art.

In addition, as another problem, in the related art, a steel wire was generally used to fix the base plate 211 to the lower end of the steel pipe casing 100, but this must be cut according to the length of the reinforcing bar network member 300 before pouring. Therefore, there is a problem that not only the risk of work is high, but also the strength of the concrete after curing is affected, reducing the efficiency in the overall process of the pile construction.

Thus, in the present invention, the tension member 231 is completely separated from the lower plate portion 210 by the operator, so that the construction can be carried out regardless of the length of the reinforcing bar network member 300, so that the design and construction are consistent, Make perfect construction.

For reference, the terms used in the present invention,'safety' and'stability',

Each refers to a property that minimizes exposure from safety accidents that may occur at the pile construction site, and refers to a property that can support the load of a structure.

As described above, it is apparent to those of ordinary skill in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention.

Therefore, since it can be implemented in various forms without departing from the technical idea or main characteristics, the embodiments of the present invention are merely illustrative in all respects and should not be interpreted as limiting, and various modifications may be made.

The present invention relates to an on-site cast pile capable of recycling tension materials and a construction method using the same, which contributes to the improvement of industrial fields related to the foundation construction of structures, such as manufacturing work and sales business, in particular, the building industry and construction industry where the present invention is used It can be applied to.

1: On-site cast piles capable of recycling tension materials
2: Construction method using cast-in-place piles that can recycle tension materials
100: steel pipe casing 200: slime inflow prevention means
210: lower plate portion 211: base plate
212: rebar net insertion hole 213: first tension recombination module
214: ground position fixing bracket 215: steel pipe position auxiliary bracket
220: upper plate portion 221: tension inventory information tank plate
222: tension re-insertion groove 223: second tension recombination module
230: tension material 231: tension material
232: first coupling module 233: second coupling module
300: reinforcing bar network member
S100: foundation dug operation step S200: pile insertion step
S210: lower plate portion position fixing step S220: first tension re-engagement step
S230: reinforcing bar network member preparation step S240: second tension reassembly step
S300: tension material separation step S400: pouring step
S500: Curing step S600: Tofu cleaning step

Claims (3)

In the cast-in-place pile (1) that can recycle the tension material,
Steel pipe casing 100 inserted into the excavated perforated hole;
Slime inflow prevention means 200 for preventing impurities and slime from flowing into the steel pipe casing 100, which is in close contact with and coupled to the upper and lower ends of the steel pipe casing 100 and inserted into the excavated perforated holes;
Consisting of; is inserted into the steel pipe casing 100, a reinforcing bar mesh member 300 to improve the durability of the pile,
Slime inflow prevention means 200,
A lower plate part 210 located at the lower end of the steel pipe casing 100 and coupled to prevent impurities and slime from flowing into the steel pipe casing 100;
Based on the steel pipe casing 100, the lower plate portion is positioned and coupled to the upper end of the steel pipe casing 100 that faces the lower plate portion 210, and the lower plate portion is operated by the operator of the tension member portion 300 An upper plate part 220 that prevents the inflow of impurities and slime into the inside of the steel pipe casing 100 while ensuring that 210 and the lower end of the steel pipe casing 100 are in close contact;
An end portion is coupled to the lower plate portion 210, the other end portion is coupled to the upper plate portion 220, and the lower plate portion 210 is raised based on the lower end of the steel pipe casing 100 by the operator's manipulation. Consisting of, the tension member 230 to be in close contact;
During pile construction, it is characterized in that by preventing impurities and slime from flowing into the steel pipe casing 100, securing the strength of concrete poured into the steel pipe casing 100, and maximizing the durability of the pile. On-site cast piles capable of recycling tension materials. The method of claim 1,
The tension member 230 is detachable from the lower plate part 210 and is recycled. In the construction method (2) using on-site cast piles capable of recycling tension materials,
Foundation excavation operation step (S100) of excavating a perforated hole into which the pile is to be inserted;
Pile insertion step (S200) of inserting the pile into the drilled hole;
The tension member separation step (S300) of separating the tension member 230 coupled to the lower plate portion 210 and removing it from the steel pipe casing 100;
The pouring step of pouring concrete into the steel pipe casing 100 (S400);
A curing step (S500) of maintaining adequate moisture until the concrete is completely hardened and protecting it from being impacted or frozen;
Consists of; a head arrangement step (S600) of finishing the head of the pile inserted into the excavated perforation hole,
During pile construction, construction method using on-site cast piles capable of recycling tension materials, characterized in that the ease of work and safety are improved due to the simplification of field work.

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