KR101071184B1 - Drilling Method For Piling At Height Restricted Area - Google Patents

Abstract

The present invention is a perforated construction for pile construction of height-limited space difficult to secure the work space is closed the top,

(a) preparatory step of selecting a drilling position to clean and organize the drilling work possible; (b) Shortening the length of the existing boom 410 and the rod 420, etc. of the hydraulic crawler drill 400 so as to secure a predetermined working space to match the height of the height restriction space, the hydraulic crawler drill Hydraulic crawler drill preparing step for installing; (c) a hammer bit attachment step of installing a conical drilling hammer bit 100 in the prepared hydraulic crawler drill 400; (d) drilling and drilling the rod by connecting the rod to the rooting depth using a hydraulic crawler drill 400 having the conical drilling hammer bit 100 attached thereto at the same time as the stabilizer injection; And (e) a drawing step of drawing out a combination of the conical drilling hammer bit 100 and the rod 420 after the drilling step; providing a drilling method for pile construction in a height-limited space, characterized in that consisting of. do.

In addition, (f) after the drawing step, the file installation step of inserting the file, such as H-pile up to the depth of insertion and install the file through the process of the final stroke and grouting; It provides a drilling method for pile construction in a height-limited space characterized in that.

Height limited space, perforated, pile

Description

Drilling Method For Piling At Height Restricted Area

The present invention relates to a drilling method for pile construction in the drilling work occupying an important part of the pile construction, pile construction in a height limited space that can be easily drilled without removing the existing facilities in the height limited space, such as under the overpass Perforation method for.

Recently, due to the expansion of the transportation network, a lot of subway works have been performed in the same basement under the above-mentioned overpasses along the same overpass or bridge.

It also encourages reconstruction or remodeling, rather than dismantling existing buildings and building new ones in terms of environmental and resource protection. In the reconstruction or remodeling, such as a basement reinforcement for the basement reinforcement of the existing building is made a lot.

In the subway construction and foundation reinforcement construction, it can be said that pile construction for ground reinforcement is essential.

Conventional methods for pile construction are commonly used for (1) pile root approach using large excavators, (2) pile root approach using auto pilers, and (3) T4 augers. Pile rooting method;

(1) The pile root approach method using a large excavator is a method of constructing by driving or pressing a pile from the ground by mounting a vibro hammer or a hydraulic device on the tip of the arm of the excavator.

(2) The pile rooting method using an auto piler is a method in which the pile is press-fitted using hydraulic pressure using an auto piler.

(3) The pile rooting method using the T4 auger is a method of inserting a pile by holding a hollow wall after inserting a casing using an auger and drilling the inside of the casing.

However, when the upper space for the pile installation work, such as the above-mentioned subway construction and foundation reinforcement construction is extremely limited, the conventional method is difficult to apply for the following reasons.

(1) The pile root access method using a large excavator should be secured with an upper space of 5M or more, and can be used only on soft ground with an N value of 30 or less. In addition, there is a disadvantage that it is difficult to secure the vertical degree (1/75 ~ 1/200) on the specification because the pile is press-installed.

(2) The pile rooting method using an auto piler should be secured with an upper space of 5M or more like the pile rooting method using a large excavator, and can be mainly used only on a soft ground having an N value of 30 or less. In addition, there is a disadvantage that it is difficult to secure the vertical degree (1/75 ~ 1/200) on the specification because the pile is press-installed. In addition, a large amount of water and water jet equipment are required because the water jet must be parallel. In addition, the mobility of the auto piler (auto piler) itself is not secured there is a disadvantage that must be moved to install using other equipment.

(3) The pile rooting method using the T4 auger is a method of drilling using the conventional drilling hammer bit 10 shown in FIG. 1 and is applicable to most lipids regardless of the N value. Although there is an advantage that can be maintained, the upper space of 8M or more must be secured, and after the installation of the casing for the maintenance of the wall wall is difficult to draw the installed casing has a disadvantage of being unsuitable for drilling the depth.

Figure 1 is a perspective view showing a conventional drilling hammer bit 10 mainly used in the pile rooting method using a T4 auger (auger).

Conventional drilling hammer bit 10 as shown in Figure 1, the overall shape is a column (圓柱, column) form.

Therefore, when drilling and drilling the ground, a lot of friction with the drilling wall (1) occurs, not only the poor drilling ability to dig into the ground, but also has the disadvantage of poor compaction performance of the drilling wall (1). Therefore, in order to achieve the desired desired performance, a large-scale and large-capacity hydraulic drill is required at the time of drilling, and vibration and noise are generated beyond the allowable range, causing a lot of complaints.

In the above-mentioned conventional high-altitude boring for pile construction in a height-restricted space such as a basement or a basement, the conventional hydraulic crawler drill 400 and the hammer bit 10 cannot be used without improvement.

Because the length of the existing boom 410 and the rod 420, etc. of the hydraulic crawler drill 400 is longer than necessary to secure a height for drilling, the above-described conventional drilling hammer bit 10 This is because the size and capacity of the hydraulic crawler drill is so much larger than necessary that a large horizontal and vertical workspace is required.

Therefore, in the related art, in order to perform the drilling work under the overpass, the overpass was demolished or the overpass was carried out to perform the perforation work. Basic reinforcement was performed.

However, such a conventional construction method has caused enormous economic time loss such as dismantling existing facilities, and requires a wide working space, thus causing problems such as damage to adjacent roads and adjacent buildings.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the related art.

The object of the present invention relates to a drilling method for the construction of piles in a height-restricted space in the drilling work occupying an important part of the pile construction, can be easily drilled without removing the existing facilities in the height-restricted space, such as under the elevated road The present invention provides a drilling method for pile construction in a height-limited space.

In order to solve the above technical problem, the present invention is closed in the drilling work for the construction of the pile height limit space difficult to secure the work space,

(a) preparatory step of selecting a drilling position to clean and organize the drilling work possible; (b) Shortening the length of the existing boom 410 and the rod 420, etc. of the hydraulic crawler drill 400 so as to secure a predetermined working space to match the height of the height restriction space, the hydraulic crawler drill Hydraulic crawler drill preparing step for installing; (c) a hammer bit attachment step of installing a conical drilling hammer bit 100 in the prepared hydraulic crawler drill 400; (d) drilling and drilling the rod by connecting the rod to the rooting depth using a hydraulic crawler drill 400 having the conical drilling hammer bit 100 attached thereto at the same time as the stabilizer injection; And (e) a drawing step of drawing out a combination of the conical drilling hammer bit 100 and the rod 420 after the drilling step; providing a drilling method for pile construction in a height-limited space, characterized in that consisting of. do.

In addition, (f) after the drawing step, the file installation step of inserting the file, such as H-pile up to the depth of insertion and install the file through the process of the final stroke and grouting; It provides a drilling method for pile construction in a height-limited space characterized in that.

According to the present invention, the following effects are expected.

First, the possibility of civil complaints is lowered due to less vibration and noise, and the construction of piles in a height-restricted space that can be applied directly under the existing facilities without having to remove existing traffic or control traffic in height-restricted spaces such as under a bridge or basement Provide drilling methods.

Second, it can be applied if only about 4M of upper space is secured, and the self-moving of drilling equipment is possible, and it provides a drilling method for pile construction in height limited space that can reduce construction cost and air.

Third, when drilling and drilling the ground by using the conical drilling hammer bit, the friction with the perforated wall (1) is less generated and the ability to dig into the ground is excellent, so that it can be applied regardless of the geology of the strata. The vertical degree can be secured, and the compaction ability of the perforated wall 1 is also excellent, thus providing a perforation method for pile construction in a height-limited space that does not require a separate casing installation.

Fourth, by reducing the length of the boom 410 and the rod 420 and the like of the conventional hydraulic crawler drill 400 and using the conical drilling hammer bit 100, in the height limit space, such as overpass or under the bridge or basement Provides a drilling method for pile construction in a height-limited space available for drilling.

The present invention relates to a drilling method for the construction of piles in a height-restricted space in the drilling work occupying an important part of the pile construction, height-restricted space that can be easily perforated without removing the existing facilities in the height-restricted space, such as under the elevated road Perforations for pile construction in

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

4 is a conceptual diagram illustrating an implementation process of a drilling method for pile construction in a height limitation space of the present invention, Figure 5 is a flow chart showing a process of a drilling method for pile construction in a height limitation space of the present invention.

6 and 7 illustrate the process of the drilling step and the pile installation step of the drilling method for the pile construction in the height limit space of the present invention, respectively.

The drilling method for pile construction in the height limit space of the present invention,

In the drilling work for the pile construction of the height-restricted space where the upper part is closed and difficult to secure the working space,

(a) preparatory step of selecting a drilling position to clean and organize the drilling work possible; (b) Shortening the length of the existing boom 410 and the rod 420, etc. of the hydraulic crawler drill 400 so as to secure a predetermined working space to match the height of the height restriction space, the hydraulic crawler drill Hydraulic crawler drill preparing step for installing; (c) a hammer bit attachment step of installing a conical drilling hammer bit 100 in the prepared hydraulic crawler drill 400; (d) drilling and drilling the rod by connecting the rod to the rooting depth using a hydraulic crawler drill 400 having the conical drilling hammer bit 100 attached thereto at the same time as the stabilizer injection; And (e) a drawing step of drawing out a combination of the conical drilling hammer bit 100 and the rod 420 after the drilling step.

In addition, (f) after the drawing step, the file installation step of connecting the file, such as H-pile up to the depth of insertion and install the file through the process of the final stroke and grouting; may be further added. .

The preparation step (a) refers to the step of cleaning and arranging to select a punching position to enable drilling. That is, the measurement operation for drilling in the height-restricted space, such as under the overpass and the hydraulic crawler drill 400 is placed in a predetermined place and refers to the overall preliminary preparation process for drilling. In addition, in order to secure the height for construction, the periphery of the periphery of the ground is excavated to a certain depth to secure the construction height and position the equipment.

In the preparation of the hydraulic crawler drill, the length of the existing boom 410 and the rod 420 of the hydraulic crawler drill 400 is adjusted to the height of the limited space so as to secure a predetermined working space vertically. To make so short, it refers to the step of installing in the hydraulic crawler drill (400).

In a conventional construction site, the ready-made boom 410 and the rod 420, etc., which are manufactured and manufactured without attempting to reduce the length of the existing boom 410 and the rod 420, etc. of the hydraulic crawler drill 400, are used as they are. It was. Therefore, the demolition of the existing facility was inevitably performed, but in the case of the present invention, the boom 410 and the rod 420 are made short in accordance with the height of the existing facility, so that the demolition of the existing facility is unnecessary and the conventional hydraulic crawl The drilling capability possessed by the ludrill 400 is maintained as it is, and there is an advantage of ensuring verticality in the specification.

The (c) hammer bit attachment step refers to a step of installing a conical drilling hammer bit 100 to the prepared hydraulic crawler drill 400.

The conical drilling hammer bit 100, as shown in Figure 2, the main body bit 200 is formed with a plurality of body ball tips 210 of the projection shape on the surface in a conical shape of the radius is reduced from the top to the bottom as a whole; And a lower bit 300 which is fastened to a lower end of the main body bit 200 and has a plurality of lower ball tips 310 having a protrusion shape on a surface thereof. In addition, a plurality of body bit discharge grooves 220 and lower bit discharge grooves 320 may be further added to the surfaces of the body bits 200 and the lower bits 300, respectively, and the lower bits 300 may be added. The lower bit discharge groove 320 of the stabilizer discharge port 330 may be further added.

The main body bit 200 and the lower bit 300 is made of a material having excellent durability, such as conventional carbon steel mainly used in the conventional drilling hammer bit 10, the wear resistance on the surface of the main body bit 200 Excellent high manganese-based coating material can be used.

The drilling step (d) refers to the step of drilling and connecting the rod to the root depth using the hydraulic crawler drill 400 is attached to the predetermined position at the same time as the injection of the stabilizer.

As shown in FIG. 3, the operation of the conical drilling hammer bit 100 used in the drilling method for pile construction in the height limitation space of the present invention is as follows.

Unlike the conventional cylindrical hammer bit (10) for drilling because it is manufactured in the overall conical shape, when using the conical drilling hammer bit 100 to drill the ground to excavate less friction with the perforated wall (1), Excellent crushing ability of rock and the like, and good performance of digging into the ground. In addition, it is easy to ensure the excavation verticality.

In addition, the conical drilling hammer bit 100 of the present invention helps the stabilizer such as bentonite to penetrate the perforated wall 1 well, and the crushed soil mixed with the stabilizer to compact the perforated wall (1). Therefore, even without the casing, the collapse is less likely to occur than the drilled wall 1 excavated using the conventional drilling hammer bit 10.

Figure 6 shows the process of the drilling step of the drilling method for the pile construction in the height limitation space of the present invention.

As shown in the drawing, a short rod made in accordance with the upper confined space may be continuously drilled at the same time while maintaining verticality at a desired depth regardless of the drilling depth.

The (e) drawing step is a step of drawing a combination of the conical drilling hammer bit 100 and the rod 420 after the drilling step. As described above, since there is little fear of collapse of the vacant wall, a combination of the conical drilling hammer bit 100 and the rod 420 can be drawn easily and safely in a short time.

7 is a view illustrating a process of a pile installation step of a drilling method for pile construction in a height limited space of the present invention, Figure 8 is a detailed view of the joint portion of the various piles.

The file installation step (f) refers to a step of installing a file through a process such as final hitting and grouting by inserting a file such as an H-pile up to the depth of induction after the drawing step. As already mentioned above, the perforated wall is formed. As described above, the perforated wall 1 is well compacted so that there is little risk of decay of the wall even without a casing. It is also possible to install, etc. In some cases, it is possible to construct a concrete pile.

(1) The joint of the H-pile may use a jointing method such as a conventional welding, but as shown in FIG. 8A, the connecting iron plate is formed so that the connecting steel sheet protrudes from the web and the flange of the lower end of the upper pile. Install by welding and install so that the connecting steel plate of the lower end of the upper pile is fitted to the web and the flange of the upper end of the lower pile and welds the remaining joints.

 (2) The joint of the steel pipe pile may use a jointing method such as conventional welding, but as shown in FIG. 8B, a plurality of connecting jigs are welded to the joint of the lower end of the upper pile to be welded and installed. The connecting jig at the bottom of the upper pile is installed to be fitted to the joint at the upper end of the lower pile and then welds the remaining joints.

(3) The joints of the ready-made concrete pile may use a jointing method such as a conventional decorative joint, but as shown in FIG. 8B, irregularities are formed in the center of the joint of the lower end of the upper pile and the upper end of the lower pile. The male connecting hardware and the female connecting hardware may be installed to be embedded when the concrete pile is manufactured, and the male connecting hardware at the bottom of the upper pile may be installed to be fitted to the female connecting hardware at the top of the lower pile. In addition, it is also possible to fasten by turning each other by forming a screw thread in the concave-convex engagement between the male connecting iron and the female connecting hardware.

9 is a detailed view of the pile base in the pile installation step of the drilling method for the pile construction in the height-restricted space of the present invention, Figure 10 is a pile installation step of the drilling method for pile construction in the height-restricted space of the present invention It is an embodiment in which various files are mounted on a file holder in.

The pile holder is used as a method for temporarily fixing the file being installed in the pile installation step, which is installed on a perforated hole, and has a hole through which a pile can be penetrated in the center and holes at both ends of the hole. 9 is formed with two L-shaped angles formed on the pile top plate and the steel rods or bolts and nuts installed through the holes of the L-angles. It consists of. In addition to the illustrated embodiment, it is possible to use conventional binding means in addition to the steel rods or bolts and nuts according to the shape and material of the various piles.

Drilling method for pile construction in the height-restricted space of the present invention because it reduces the length of the conventional boom 410 and the rod 420 of the hydraulic crawler drill 400, and uses a conical drilling hammer bit 100, vibration It is less likely to cause civil complaints due to less noise and noise, and it can be applied directly under the existing facilities without the traffic control or the removal of existing facilities in the height limit space such as under the bridge or basement. Can be.

In addition, since the hydraulic crawler drill 400 is used, the drilling equipment itself can be moved, and construction cost and air can be reduced.

And when using the conical drilling hammer bit 100 to drill the ground to excavate, less friction with the perforated wall (1) occurs and the ability to dig into the ground has excellent performance can be applied irrespective of the geology of the strata. The vertical degree on the specification can be secured, and the compaction ability of the perforated wall 1 is also excellent, and no separate casing is required.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

Therefore, the claims of the present invention include modifications and variations that fall within the true scope of the invention.

1 is a perspective view showing a conventional drilling hammer bit 10.

Figure 2 is a perspective view showing a conical drilling hammer bit 100 used in the drilling method for pile construction in the height-limited space of the present invention.

Figure 3 is a cross-sectional view of the excavation surface during the implementation of the drilling method for the pile construction in the height limit space of the present invention.

4 is a conceptual diagram illustrating an implementation process of a drilling method for pile construction in a height limitation space of the present invention.

Figure 5 is a flow chart showing a process of the drilling method for pile construction in the height limit space of the present invention.

Figure 6 shows the process of the drilling step of the drilling method for the pile construction in the height limitation space of the present invention.

Figure 7 shows the process of the pile installation step of the drilling method for pile construction in the height limit space of the present invention.

8 is a detailed view of the joint portion of the various piles in the pile installation step of the drilling method for pile construction in the height-limited space of the present invention.

9 is a detailed view of the pile base in the pile installation step of the drilling method for pile construction in the height-limited space of the present invention.

10 is an embodiment in which various files are mounted on pile piles in the pile installation step of the drilling method for pile construction in the height limit space of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: perforated wall

10: Conventional Excavation Hammer Bits

100: conical drilling hammer bit of the present invention

200: body bit

210: body ball tip

220: body bit discharge groove

300: lower bit

310: lower ball tip

320: lower bit discharge groove

330: stabilizer outlet

400: Hydraulic Crawler Drill

410: boom

420: load

Claims (7)

delete delete delete delete delete delete In the drilling work for the pile construction of the height-restricted space where the upper part is closed and difficult to secure the working space, (a) preparatory step of selecting a drilling position to clean and organize the drilling work possible; (b) Shortening the length of the existing boom 410 and the rod 420, etc. of the hydraulic crawler drill 400 so as to secure a predetermined working space to match the height of the height restriction space, the hydraulic crawler drill Hydraulic crawler drill preparing step for installing; (c) a hammer bit attachment step of installing a conical drilling hammer bit 100 in the prepared hydraulic crawler drill 400; (d) drilling and drilling the rod by connecting the rod to the rooting depth using a hydraulic crawler drill 400 having the conical drilling hammer bit 100 attached thereto at the same time as the stabilizer injection; (e) a drawing step of drawing out a combination of the conical drilling hammer bit 100 and the rod 420 after the drilling step; And, (f) after the drawing step, the file installation step of connecting and inserting the file, such as H-pile to the rooting depth and installing the file through a process such as the final stroke and grouting; In the (f) file installation step of the file connection and joint method, (1) In the case of H-pile, the connecting steel plate is welded and installed so that the connecting steel plate protrudes from the web and the flange of the upper pile and the connecting steel plate of the upper pile is connected to the web and the flange of the upper pile of the lower pile. After installation so that the rest of the seam is welded,  (2) In the case of steel pipe piles, a plurality of connecting jigs are welded to the joints at the bottom of the upper pile to protrude, and the connecting jig at the bottom of the upper pile is fitted to the joints at the top of the lower pile. Weld seams, (3) In the case of ready-made concrete piles, male and female connecting irons are respectively formed to form interdigital concavities and convexities at the bottom of the upper pile and the upper end of the lower pile. It is characterized in that the installation to be fitted to the female connecting hardware at the top of the pile, As a method for temporarily fixing the file being installed in the (f) file installation step, It is installed on the perforated hole, the pile is formed in the center through which the pile can be penetrated, and two L-angle angles formed with holes at both ends of the hole are installed on the pile top plate and the hole of the L-angle angle Drilling method for pile construction in a height-restricted space, characterized in that using a pile rod consisting of a steel rod or bolt and nut installed through the.

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