JPS5944421A - Method and apparatus for construction of foundation pile - Google Patents

Abstract

PURPOSE:To quickly and exactly construct a deformed pit by a method in which the ground is excavated by an excavating roller provided at the lower part of an auger casing, and an auger casing is operated while compacting the excavating soil with the wall of the pit. CONSTITUTION:When an excavator is operated, a tip excavating roller 7 and the excavating roller of an drill head 2 are turned in a fixed direction, and the ground is excavated by an excavating blade 4 and an auger casing 1 is penetrated. The excavated soil A is pressed on the wall of the excavated pit B by the large-diameter soil pressing face 9 of the auger casing 1 to form a deformed pit of a flat square or square type. The auger casing 1 is then pulled up, during which period cement mortar is jetted from a mortar jet nozzle 10 and packed into the excavated pit B to form a deformed cement mortar pillar, and a custom-made pile is penetrated into the cement mortar.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for constructing foundation piles that are completely silent and vibrationless 4 (Ih) in short Sabama without removing the foundation piles with VC chips before soil improvement. It is related to the device.

Conventionally, various construction methods have been developed for foundation piles depending on the purpose, but most of these methods involve digging holes in the ground with a screw auger, so they can be constructed without noise or vibration. On the other hand, when the shape of the hole is round and the shape of the hole is round, the shape of the hole is difficult to form. Vcp5 soil removal work required a considerable amount of labor, and there were major drawbacks in terms of drunkenness.

The present invention is aimed at solving the drawbacks of holes,
At the bottom of the auger casing, which forms a large-diameter soil surface at the bottom, there is an integrally connected drilling head consisting of several drilling rollers with drilling blades on the circumferential surface, which are rotatably arranged in each fixed direction. By means of the induced cutting device, the cutting roller is
At the same time, the O5 hole is made in the ground through auxiliary rotation, and the auger casing is dug while the soil from the hole is cultivated on the circumferential wall of the hole, and a different hole such as an elevated square or blade-shaped hole is made in the ground. r! By providing a construction method for foundation piles that is characterized by drilling holes, the main objective is to quickly and reliably construct any type of pile with complete silence, no vibration, and scorched earth removal.

To clarify the detailed structure of the concrete example structure below, a borehole head (2) is integrally connected to the lower part of the auger casing (11), and around the borehole head (2) there are Excavation roller (81mm mm).Excavation roller (31mm)
・The 9th fist is the rotary drilling blade (4) shown in the first diagram or the rotary excavation blade (4) shown in the second diagram (
/ I A spiral-shaped excavation N piece (51 units are installed, and each excavation blade (4)... is connected via ae tea (61) so that the fist rotates in the same direction in a certain direction. At the same time, an excavation roller (7) 1 or an excavation drill (81) is attached to the tip of the hole head (2).

Note that the diameter a of the auger casing (11 is at least the diameter of the borehole head (2.1K), and the diameter of the auger casing (11) is larger than the diameter of the bore hole (2.1K).
) is formed.

＋＞〈+Underwater, the code (10) is the auger casing (1
Jet water 1 mortar pipe (7, 11)
It is an injection port that can be communicated with.

The actual 1st j is ground level using ■4-hole device with Iki configuration! To explain all 11 examples of this, first, the device of the present invention is launched on a predetermined ground with heavy weight e, and then F (power (not shown) is applied) to drive the device. Tip drilling roller (γ1 and drilling head (2)
The excavation rollers (81... rotate in a certain direction, and the excavation blades (41...) attached to each roller excavate the ground and dig underground, but the Iq auger casing (1)
One power! As the excavated soil A increases, the auger casing (11
Is it necessary to expand the pressure on the 3rd circumferential wall of the borehole with the large-diameter compacted soil surface (9) that is formed on the surface? It is possible to easily make irregularly shaped holes such as oblate shaped holes or blade shaped holes in the ground.

It goes without saying that the work can be expected to be made easier by injecting air jets and jet water from the auger tip FfB through the mortar pike (11) in conjunction with the digging action.

It is also possible to rotate the auger casing (11) and the hole head (2) in the axial direction depending on the shape of the pouring hole with the eyes (5).

After digging the hole in the ground, the auger casing (11) was pulled up into the ground, and the mortar M'f was
In addition to creating a special-shaped mortar column in the ground by injection filling into the borehole B, a steel top plate, a special-shaped pile, etc. are inserted into the mortar to create a strong structure with a large diameter. It is possible to easily construct the base shaft in a neat manner.

As mentioned above, the construction method of the foundation pile according to the present invention is to excavate the entire underground hole like a mole by the excavation action of the excavation roller (TE) attached to the excavation roller (2!) and form the auger casing. Although (1) is intended to improve excavability, it is of course easy to construct a foundation even in hard and soft geological strata, but it has been done in the past with the utmost precision 7 + 2:
It is possible to quickly and reliably drill irregular holes such as sheet piles and irregular pits, and since the front rudder excavation hole is based on a rotating mechanism, it has features such as complete silence and no vibration.

Furthermore, during the drilling, as the auger casing (1) advances, the Cushing compaction surface (0) expands and compacts the circumferential wall of the excavation ± hole, forming a strong compaction wall. This method has the effect of being a constant watchdog, which eliminates the need for soil removal during work, significantly shortens the construction period, and eliminates concerns about soil being thrown away.

[Brief explanation of the drawing]

The drawings illustrate the actual cutting mode of the present invention. Figure 1 is an overall view of some parts of the foundation girder construction equipment r[11 Figure 2 is the same as above, but a front view of the head with another implementation structure. Figure 3 is a diagram of the excavated hole. Description (11 auger casing, (2) drilling head, (31 pressing roller, (4) drilling blade, (5) drilling wing piece. (61 interlocking mechanism% (a) tip drilling roller. (8) drilling drill , (9) Extrusion surface, (101 jet injection port. (11) Same pipe A, excavated soil, B, excavated hole 1M1 mortar Patent applicant 93

Claims (1)

[Claims] θ) An excavation roller formed by disposing a number of excavation rollers having excavation blades on the circumference at the lower part of an auger casing that forms a large-diameter earth surface downwardly at rotational intervals in each fixed direction. Integrated EFL hole head
Due to the continuous construction of K≠Gin, a hole is dug into the ground through the drive rotation of the front excavation roller, and at the same time the KITll excavation soil is compressed against the circumferential wall of the hole, while the auger casing is made to dig into the ground. A construction method for foundation piles that is characterized by drilling irregularly shaped holes such as oblate or square holes.■ A construction method that has a drilling blade on the circumference at the bottom of an auger casing that forms a large diameter excavated surface metal at the bottom. C) A construction device characterized in that a boring head is integrally arranged in series with the grounding roller.