TW202611370A - Construction methods for building piles - Google Patents

Abstract

A method for constructing a pile includes: (A) using a guide tube of a drilling machine to guide and position a casing, and connecting the upper end of the casing to a motor of the drilling machine; (B) using the motor to drive the casing and a auger of the drilling machine to rotate, causing the casing and the auger to drill into a soft soil base to a predetermined depth, wherein the auger... (C) The excavated soft soil can be discharged through one of the discharge holes of the casing; (D) the casing is separated from the motor; (D) cement grout is poured into the internal space of the casing through the internal conduit of the auger, and then the auger is pulled out; (E) a construction pile is inserted into the cement grout; (F) dry sand and gravel are backfilled on the cement grout; and (G) the casing is pulled out.

Description

Construction methods for building piles

This invention relates to a construction method, and more particularly to a construction method for erecting piles.

Referring to Figure 1, the conventional drilling machine 1 is used to install a construction pile (e.g., intermediate pile, platform pile, large-diameter foundation pile, etc.) on a construction site. The drilling machine 1 mainly includes a auger 11, a motor 12 for providing the rotational power required by the auger 11, and a guide cylinder 13 for guiding the auger 11. When the construction site is a hard soil base, the auger 11 can smoothly and safely drill the cylindrical borehole required for inserting the construction pile in the hard soil base. However, if the construction site is located on a soft soil layer, the loose soil could cause it to collapse into the cylindrical borehole when the auger 11 completes drilling and is pulled upwards, posing a significant danger to nearby vehicles, machinery, and personnel. Therefore, it is necessary to find a solution.

Therefore, the purpose of this invention is to provide a construction method for building piles.

Therefore, the construction method for erecting a pile according to the present invention is applicable to setting up a pile in a soft soil base using a drilling machine, the drilling machine including a auger, a motor, and a guide tube. The construction method for erecting a pile includes the following steps: (A) using the guide tube of the drilling machine to guide and position a casing including a plurality of saw teeth and at least one discharge hole, and connecting the upper end of the casing to the motor of the drilling machine; (B) using the motor to drive the casing and the auger to rotate, so that the casing and the auger drill to excavate the soft soil base to a predetermined depth, wherein (C) The soft soil excavated by the auger can be discharged through the discharge hole of the casing; (D) Separate the casing from the motor; (E) Use the internal pipe of the auger to pour cement grout into the internal space of the casing, and then pull out the auger; (F) Insert the construction pile into the cement grout; (G) Backfill dry sand and gravel on the cement grout; and (G) Pull out the casing.

Another object of the present invention is to provide an alternative method for constructing a pile, applicable to the use of a drilling rig to construct a pile in a soft soil base. The drilling rig includes a auger, a motor, and a guide tube. The method for constructing the pile comprises the following steps: (a) with the auger not engaged with the motor, guiding and positioning a casing comprising a plurality of serrations using the guide tube of the drilling rig, and engaging the upper end of the casing with the motor of the drilling rig; (b) using the motor to rotate the casing, causing the casing to drill into the soft soil base to a predetermined depth; (c) separating the casing from the motor, and connecting the auger to the motor. (d) Using the motor to rotate the auger, causing the auger to drill into the soft soil base to the predetermined depth; (e) Using the internal pipe of the auger, injecting cement grout into the internal space of the casing, and then pulling out the auger; (f) Inserting the construction pile into the cement grout; (g) Backfilling the cement grout with dry sand and gravel; and (h) Pulling out the casing.

The advantages of this invention are: through the coordinated operation of the casing and the drilling machine, it can be applied to the installation of the camp pile in the soft soil base. During the drilling process of the auger drill in the soft soil base, the casing can protect the soft soil around the casing from collapse, providing a high level of safety for nearby vehicles, equipment and personnel during construction.

Referring to Figures 2 to 7, a first embodiment of the construction method for erecting a pile according to the present invention is applicable to setting up a pile 7 (e.g., an H-beam) on a soft soil base 8 using a drilling rig 9. The drilling rig 9 includes a auger 91, a motor 92, and a guide tube 93. In this first embodiment, the construction method for erecting the pile includes the following steps: First, as shown in step S31 of Figure 2, a sleeve 2 including several saw teeth 21 and at least one discharge hole 22 is guided and positioned using the guide tube 93, and the upper end of the sleeve 2 is connected to the motor 92 of the drilling rig 9, as shown in Figure 3. The sleeve 2 is connected to the motor 92 by several bolts (not shown). In this first embodiment, the sleeve 2 is made of steel. The diameter of the sleeve 2 is 70 cm to 100 cm, and the length is 3 m to 15 m.

Next, as shown in step S32, the motor 92 drives the casing 2 and the auger drill 91 to rotate, causing the casing 2 and the auger drill 91 to drill into the soft soil base 8 to a predetermined depth. The soft soil excavated by the auger drill 91 can be discharged through the discharge hole 22 of the casing 2, as shown in Figures 4 and 5. When the casing 2 has drilled into the soft soil base 8 to the predetermined depth, approximately 1.2 meters of the casing 2 remains above the ground surface 81.

Next, as shown in step S33, the sleeve 2 is separated from the motor 92.

Next, as shown in step S34, cement grout 6 is poured into the inner space of the sleeve 2 through the internal pipe 910 of the spiral drill rod 91, as shown in Figure 5. The strength of the cement grout 6 is between 140 kg/cm² and 210 kg/cm². Then, the spiral drill rod 91 is pulled out.

Next, as shown in step S35, the construction pile 7 is inserted into the cement grout 6 to the required design depth, as shown in Figure 6.

Next, as shown in step S36, after the cement slurry 6 has initially solidified for about one or two days, dry sand and gravel 5 are backfilled on the cement slurry 6, as shown in Figure 7. Finally, as shown in step S37, the sleeve 2 is pulled out, thus completing the first embodiment of the construction method for erecting piles according to the present invention.

Referring to Figures 8 to 14, a second embodiment of the construction method for pile erection of the present invention includes the following steps. First, as shown in step S41 of Figure 8, without the auger 91 being engaged with the motor 92, the guide tube 93 is used to guide and position the casing 2, and the upper end of the casing 2 is engaged with the motor 92 of the drilling machine 9, as shown in Figure 9. Then, the motor 92 is used to drive the casing 2 to rotate, so that the casing 2 drills into the soft soil base 8 to a predetermined depth, as shown in Figure 10.

Next, as shown in step S42, the sleeve 2 is separated from the motor 92, and the spiral drill rod 91 is engaged with the motor 92, as shown in Figure 11.

Next, as shown in step S43, the motor 92 drives the spiral drill 91 to rotate, so that the spiral drill 91 drills into the soft soil base 8 to the predetermined depth.

Next, as shown in step S45, cement grout 6 is poured into the internal space of the sleeve 2 through the internal pipe 910 of the spiral drill rod 91, as shown in Figure 12. The strength of the cement grout 6 is between 140 kg/cm² and 210 kg/cm². Then, the spiral drill rod 91 is pulled out.

Next, as shown in step S46, the construction pile 7 is inserted into the cement grout 6 to the required design depth, as shown in Figure 13.

Next, as shown in step S47, after the cement grout 6 has initially solidified for about one or two days, dry sand and gravel 5 are backfilled on the cement grout 6, as shown in Figure 14. Finally, as shown in step S48, the sleeve 2 is pulled out, thus completing the second embodiment of the construction method for erecting piles according to the present invention.

In summary, the advantages and benefits of this invention are that, through the coordinated operation of the casing 2 and the drilling machine 9, it can be applied to the installation of the foundation pile 7 in the soft soil base 8. During the drilling process of the auger drill 11 in the soft soil base 8, the casing 2 can protect the soft soil around the casing 2 from collapse, providing a high level of safety for nearby vehicles, equipment and personnel during construction; thus, it can indeed achieve the purpose of this invention.

However, the above description is merely an example of the present invention and should not be used to limit the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the patent specification shall still fall within the scope of the present invention.

2: Sleeve 21: Sawtooth 22: Drain Hole 5: Dry Sand and Gravel 6: Cement Slurry 7: Piling 8: Soft Soil Base 81: Ground 9: Drilling Machine 91: Spiral Drill Rod 910: Internal Pipeline 92: Motor 93: Guide Sleeve S31~S37: Steps S41~S48: Steps

Other features and benefits of this invention will be clearly shown in the embodiments with reference to the accompanying drawings, in which: Figure 1 is a schematic diagram illustrating a conventional drilling machine; Figure 2 is a flowchart illustrating a first embodiment of the pile erection method of this invention; Figure 3 is a partial sectional view illustrating the casing positioning step in the first embodiment; Figure 4 is a partial sectional view illustrating the soil excavation step in the first embodiment; Figure 5 is a partial sectional view illustrating the grouting step in the first embodiment; Figure 6 is a partial sectional view illustrating the pile insertion step in the first embodiment; Figure 7 is a sectional view illustrating the backfilling step in the first embodiment; Figure 8 is a flowchart illustrating a second embodiment of the pile erection method of this invention; Figure 9 is a partial cross-sectional view illustrating the casing positioning step in one of the second embodiments; Figure 10 is a partial cross-sectional view illustrating the casing being rotated and inserted to a predetermined depth in one of the second embodiments; Figure 11 is a partial cross-sectional view illustrating the separation of the casing from a motor of a drilling machine and the engagement of a auger rod of the drilling machine with the motor in one of the second embodiments; Figure 12 is a partial cross-sectional view illustrating the grouting step in one of the second embodiments; Figure 13 is a partial cross-sectional view illustrating the pile installation step in one of the second embodiments; and Figure 14 is a cross-sectional view illustrating the backfilling step in one of the second embodiments.

S31~S37: Steps

Claims (12)

A method for constructing a pile, applicable to setting up a pile in a soft soil base using a drilling rig, the drilling rig including a auger, a motor, and a guide tube, the method comprising the following steps: (A) Using the guide tube of the drilling rig to guide and position a casing including a plurality of saw teeth and at least one discharge hole, and connecting the upper end of the casing to the motor of the drilling rig; (B) Using the motor to drive the casing and the auger to rotate, causing the casing and the auger to drill into the soft soil base to a predetermined depth, wherein the soft soil excavated by the auger can be discharged through the discharge hole of the casing; (C) Separating the casing from the motor; (D) Using the internal conduit of the auger drill rod, pour cement grout into the internal space of the casing, then pull out the auger drill rod; (E) Insert the erection pile into the cement grout; (F) After the cement grout has initially solidified, backfill it with dry sand and gravel; and (G) Pull out the casing. The construction method for constructing piles as described in claim 1, wherein in step (A), the casing is made of steel. The construction method for constructing a pile as described in claim 1, wherein in step (A), the sleeve is connected to the motor by a number of bolts. The construction method for constructing piles as described in claim 1, wherein in step (A), the diameter of the casing is 70 cm to 100 cm and the length is 3 m to 15 m. The construction method for constructing piles as described in claim 1, wherein in step (B), when the casing is drilled into the soft soil base to the predetermined depth, the casing with a length of approximately 1.2 meters remains above the ground. The construction method for constructing a pile as described in claim 1, wherein in step (E), the pile is an H-beam. A method for constructing a pile, applicable to setting up a pile in a soft soil base using a drilling rig, wherein the drilling rig includes a auger, a motor, and a guide tube, and the method comprises the following steps: (a) With the auger not engaged with the motor, guiding and positioning a casing comprising a plurality of serrations using the guide tube of the drilling rig, and engaging the upper end of the casing with the motor of the drilling rig; (b) Rotating the casing using the motor, causing the casing to drill into the soft soil base to a predetermined depth; (c) Separating the casing from the motor and engaging the auger with the motor; (d) Using the motor to rotate the auger, the auger drills into the soft soil base to the predetermined depth; (e) Using the internal conduit of the auger, cement grout is poured into the internal space of the casing, and then the auger is pulled out; (f) The erection pile is inserted into the cement grout; (g) After the cement grout has initially solidified, dry sand and gravel are backfilled on top of the cement grout; and (h) The casing is pulled out. The construction method for constructing piles as described in claim 7, wherein in step (a), the casing is made of steel. The construction method for constructing a pile as described in claim 7, wherein in step (a), the sleeve is connected to the motor by a number of bolts. The construction method for constructing a pile as described in claim 7, wherein in step (a), the diameter of the casing is 70 cm to 100 cm and the length is 3 m to 15 m. The construction method for constructing a pile as described in claim 7, wherein in step (b), when the casing is drilled into the soft soil base to the predetermined depth, the casing with a length of approximately 1.2 meters remains above the ground. The construction method for constructing a pile as described in claim 7, wherein in step (f), the pile is an H-beam.