JPS5862217A - Pile construction work - Google Patents

Abstract

PURPOSE:To prevent the breakage of a pile by a method in which a pile and a steel pipe are brought down while turning a spiral auger provided to the steel pipe inside the hollow of the pile for excavation and soil discharging and the pile is penetrated into the excavated pit and fixed. CONSTITUTION:A soil discharge-guiding steel pipe 2 of a hollow cylindrical form is inserted into the hollow 1a of a pile 1 to cover the inner face of the hollow and also a spiral auger 3 is inserted into the steel pipe 2. Then, the spiral auger 3 is brought down while turning, excavation is made by means of an auger head 3a to form an excavated pit 4, and at the same time the steep pipe 2 is brought down to discharge the excavated soil to the upside. When the tip of the pile 1 reaches a support layer 5, the soil discharge guide steel pipe 2 and spiral auger 3 are pulled up, and then the head of the pile is struck by a hammer, etc., to drive the pile for fixation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for inserting piles, or a method for digging in the pile.

In the conventional hollow excavation method, a spiral auger is inserted into the hollow hole of the pile, rotated and lowered for one excavation and seven excavated soil discharges (discharge), and the pile is inserted into the excavated hole formed here. However, at this time, pressure from the excavated soil acts on the inner surface of the piles, and this pressure may cause vertical cracks in each pile, and if the cobbles are lost in the excavated soil, a1 this cobble. However, the problem was that the inner surface of the pile could be damaged, resulting in damage to the pile.

The present invention was developed in the 1st century with the aim of providing a pile that would not be damaged even if there were boulders in the excavated soil without applying pressure from the excavated soil inside the pile. Ruri, its JI!, the meaning is earth removal guide in the hollow hole of the pile - lightning t1
Insert a spiral auger into each of the soil removal guide steel pipes,
The spiral auger rotates seven times and descends nine times, and I! ij
At the same time, the earth removal guide IF is also lowered to carry out excavation and earth removal, and a pile is placed in the excavation hole formed here, and a blow is applied or a bamboo lever is used to secure the pile. In particular, the present invention will be explained in detail based on the illustrated example of the construction method for piles, which is based on the construction method of piles. In the main map, first the same figure 0
), a hollow cylindrical soil removal guide pipe 2 is inserted into the hollow hole 1a of the pile 1, and the inner surface 2c of the hollow hole 1& of the pile 1 is inserted.
At the same time, a spiral auger 3t# is inserted into this soil removal guide-lighter 2.

In this state, the spiral auger is rotated and lowered, and the auger and head 3a at the tip of the spiral auger are used to perform excavation to form the excavation hole 4, and at the same time, the tilled soil guide steel pipe 2 is removed by the excavation ±1r caused by the excavation of the soil guide steel pipe 2. Earth removal guide-Snow 2
At this time, the excavated soil is passed between the hollow hole 1aQ17'3 of the pile 1 and the soil auger 3, and is discharged to the top.
Since it does not come into contact with the surface, no pressure is applied by the excavated soil, and the 1% soil removal guide prevents cobbles from being trapped in the excavated soil.
Since the pile 1 is guarded by the pipe 2 and does not collide with the inner surface of the hollow hole 1a of the pile 1, the pile 1 will not be damaged by pressure from excavated soil, boulders, etc.

Note that the spiral auger 3 can be rotated by rotating the earth removal guide tube 2t in the opposite direction to the rotation direction of the spiral auger 3.
As the rotational speed increases relative to the soil removal guide-tube 2, the soil efficiency can be recited.

Then, in the above-mentioned excavation hole 4, 1 ton of piles are inserted into the excavated hole 4, and the platform, which does not sink due to mechanical force and does not sink by itself, is penetrated by press-fitting with a pressure jack or the like or by applying a percussion ζ. Ruru.

In addition, by sending water from the tip 4 of the auger head 3a, the soil resistance of the pile can be felt and at the same time the soil removal effect can be increased by 4ct.
″＾You can also stop.

Then, when the tip of the pile l reaches the support layer 5vc, it is pulled up to the earth removal guide f2 and the spiral auger 3 (see the same figure).
(b)) Then, the head of the pile 1 was hit with a hammer 6, etc., and a shock force of ``LI9r constant'' was applied. Type in until you confirm (same figure (c)) This nine kit! Add d to make a complete support pile.

Figure 2 rx J: = c Shows the case where root support #) is performed instead of blowing with hammer 6. Ruri, stake l
Inject mortar (my father used cement milk) 71 into the bottom of the pile and let it harden. In addition, the mortar 7 may be injected from the tip of the auger head 3& (Q destination
When excavating while sending more water a, it is necessary to inject mortar 7 from the base of the auger head 3 act when pulling it out. The present invention provides an earth removal guide steel pipe in the hollow hole la of the pile l as described above. 2t1 Insert the spiral augers 3 into each of the earth removal guides t2, rotate the spiral augers 3 and lower them, and at the same time lower the earth removal guide tube 2 to perform excavation and earth removal. Pile 1 was inserted into the excavated hole 4 circles, and the pressure was applied to the circular surface of the hollow hole 1a of pile 1 by the excavated soil. Also, since there is no collision with the cobblestones, damage to the pile l due to this pressure and cobbles can be completely prevented.
If the spiral auger 3 is rotated in the opposite direction to the rotation direction of the spiral auger 3, the soil removal efficiency can be improved by #I! The rice is effective.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the invention sequence [shown in FIG.
Pile, la... hollow hole, 2@... earth removal guide pipe, 3
1111 Spiral auger, 3a...Auger head, 4...Drilling hole, 5...Support layer, 6...Hammer, 7e...Mortar (cement milk).

Claims (1)

[Claims] (1) Insert a spiral auger into the soil removal guide tubes t and aJ into the hollow hole of the pile, respectively, lower the spiral auger while rotating, and simultaneously lower the RC soil removal guide detonator. Then excavate and remove the soil, insert a table into the excavated hole, and apply hammering or rock hardening [to set the soil] Pile embedding method O Q ) Soil removal guide - The pipe is rotated in the opposite direction to the rotation direction of the spiral auger to improve soil removal efficiency.
FF Claims Paragraph 1: Construction method with zero piles for construction.