JP2865571B2 - Anchor construction equipment under pressurized water - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor construction apparatus under pressured water.

[0002]

2. Description of the Related Art Various construction methods for constructing an anchor for fixing a connecting wall to the ground have been provided. However, in the construction of the anchor, there are few effective construction methods under the ground with a lot of spring water, that is, under the pressurized water, and there is a problem in the strength of the anchor.

On the other hand, the applicant of the present invention has disclosed Japanese Patent Application No. 6-18 / 1994.
No. 4545 provides a casing handling device for building anchors under pressured water.

An apparatus according to the proposal is characterized in that a drive shaft of a drilling machine is connected to one end of an adapter housed in an outer case having a swivel socket and an air coupler, and a casing is connected to the other end. It is characterized in that the pressurizing hose of the packer is connected to the connecting rod.

[0005]

The above proposal is effective, however, in order to rotate the casing when the casing is pulled out, the pressurizing hose between the packer connecting rod and the packer has a rotational force ( However, there is a risk that the space inside the pressurized hose may be blocked, and the supply of pressurized air to the packer is not stable.

The present invention relates to an improvement of the above-mentioned prior application of the present applicant, and provides an anchor-building apparatus under pressurized water capable of smoothly supplying high-pressure air from a packer connecting rod to a packer. It is intended to be.

[0007]

According to the present invention, there is provided a swivel device comprising an adapter and an outer case, the drive unit of a drilling machine being screwed on one side of the adapter. On the other side, a screw hole into which the casing is screwed, and an inner hole are formed, and an inner swivel is fixed to the inner hole. A hole is provided with a packer connecting rod, a socket for water and grout material and an air coupler are fixed to the outer case, the socket is communicated with an inner hole of the adapter, and the air coupler is connected to the inner swivel. And a telescopic pipe between the packer connecting rod and the packer provided in the guide, wherein the telescopic pipe is connected to each rod. It is and rotatably configured telescopic mutually.

[0008]

In the anchor construction apparatus under the pressurized water configured as described above, it is possible to perform expansion and expansion and contraction by water, grout material injection, air supply and exhaust while the swivel is attached to the case sink, At this time, even if the casing is rotated with respect to the swivel, or the swivel is extended and contracted with respect to the casing, these relative movements are smoothly absorbed through the telescopic pipe.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

2 to 4, an adapter 10 is provided in an inner hole 2 of an outer case 1 of a swivel, generally indicated by a reference character A, with a pair of holding rings 12, 12 fitted into annular grooves 11 on both sides. And a Teflon bearing 9a and a slide ring 9 by bolts connecting the two rings 12, 12.
The outer case 1 is rotatably supported by being locked in the axial direction with respect to the outer case 1 via the b.

A screw hole 13 is provided on one side of the adapter 10.
Is formed, and a screw hole 14 and an inner hole 15 are formed on the other side. The inner swivel 15 has an inner swivel 2
0 is fixed.

A socket 3 and an air coupler 6 are mounted on the outer periphery of the outer case 1. The socket 3 communicates with the annular groove 5 formed in the inner hole 2 via the passage 4, and the air coupler 6 communicates with the annular groove 8 via the passage 7.

On the other hand, the adapter 10 has a plurality of passages 16 communicating the annular groove 5 and the inner hole 15, an annular groove 8 and the inner hole 1.
A plurality of passages 17 communicating with the small diameter portions 15a are formed.

An enlarged diameter portion 21a is formed in the passage 17 of the inner hole 21 of the inner swivel 20, and a Teflon bearing 22, a holding ring 23 and a plurality of bolts 2 are formed on the other side.
4, the packer connecting rod 25 is rotatably housed.

Next, an embodiment of anchor construction using a swivel A and a water stop board B, which is a premise of the present invention, will be described.

(1) Drilling machine set. Level the work floor flat and set the drilling machine C at a predetermined angle (Fig. 5).
Of the guide cell 40 is set.

(2) Steel pipe sheet pile cutting. The front surface of the steel pipe sheet pile D is cut using gas at an anchoring angle.

(3) Installation of a water stop plate. Water stop plate B for stopping water between guide pipe 43 and steel pipe sheet pile D
Is welded to the steel sheet pile D.

(4) Driving the guide tube. Guide tube 43 with metal crown 44 and check valve 45
Then, the steel pipe sheet pile D is cut, and the earth and sand portion E behind is further cut by 1.0.
It is driven in anhydrous for about m.

(5) Installation of a water stop box. The water stop box 46 is attached to the water stop plate and bolted. The water stop box 46 is for preventing earth and sand and groundwater from flowing out of the gap between the guide pipe 43 and the casing 47. The water stop box 46 and the casing 47 are stopped by a rubber packing (not shown). Water.

(6) Drilling. Pressurized air is sent from the pressurized hose 33 to expand the packer 32 and seal between the steel pipe sheet pile D and the guide pipe 43,
The drive shaft 42 of the drilling machine C is inserted into one screw hole 13 of the swivel A.
Then, a casing 47 is screwed into the other screw hole 14, and water is supplied from the socket 3, and a hole is drilled with a Cronen bit 48 with a check valve at the end of the casing. The prevention of the outflow of groundwater or earth and sand into the casing 47 is achieved by the kronen bit 48. In addition, drilling water and slime are removed at the time of drilling from the drain port 46 a of the water stop box 46.

(7) Kronen bit cutting. When drilling is completed, a cutting jig (not shown) is
7, and the fixing pin (not shown) of the Kronen bit 48 is cut.

(8) Primary injection. The primary injection is performed by inserting an injection pipe (not shown) to the bottom of the hole.

(9) Tendon insertion (FIG. 6). After the primary injection, the assembled tendon 49 is put into the casing 4.
Insert into 7. The packer 50 is attached to the tendon 49 in advance so as to fit in the guide tube 43. This packer 50 is adapted to be able to cope with both the water stop in the gap between the casing 47 and the tendon and the gap between the guide tube 43 and the tendon 49.

In these apparatuses, a feature of the present technology is that the packer 50 and the packer connecting rod 25 of the swivel A are connected by a telescopic pipe 51 as shown in FIG. Numeral 51 indicates that the rods 51a, 51b and 51c constituting the telescopic pipe are rotatable and extendable with respect to each other as shown in FIGS.

(10) Pulling out the casing and injecting it under pressure (FIG. 7). As the next operation, the casing 47 is pulled out while the grout material is processed and injected from the socket 3 of the swivel A.

(11) Casing cutting (FIG. 8). The packer 50 is connected to the packer connection rod 25 of the inner swivel 20 by the telescopic pipe 51, and when the casing 47 is pulled up to the connection position, pressurized air is sent from the air coupler 6 of the swivel A to pressurize and expand the packer 50. In this state, the grout material F, water, and earth and sand flowing backward through the gap between the casing 47 and the tendon 49 when the casing is cut are shut off.

(12) Packer shrinkage (FIG. 9). After collecting the casing 47, the grout material F is removed from the socket 3.
And the pressure is reduced from the air coupler 6 to shrink the packer 50. Steps 11 and 12 are repeated until the casing 47 passes over the packer 50.

(13) Packer final pressure (FIG. 10). When the casing 47 passes over the packer 50, the packer 50 is pressurized and expanded. Thereby, the gap between the guide tube 43 and the tendon 49 is stopped, and the backflow of water and earth and sand from the hole is prevented.

(14) Mouth water treatment. The waterproof box B is removed, and a waterproof material is injected into the upper part of the packer 50.

(15) Curing. A curing period is provided until the grout material F has a predetermined strength.

(16) Tension fixation. After curing for a predetermined period, a known tension fixing is performed.

[0033]

Since the present invention is constructed as described above, the problem associated with the conventional pressure head can be solved and the casing can be pulled out with good workability.
In particular, the telescopic pipe communicates between the packer connecting rod and the packer provided in the guide, and since the telescopic pipe is configured such that the rods can extend and contract with each other and rotate freely, the packer connecting rod is formed. Even if a rotational force (twist) is generated between the and the packer, there is no danger that the space inside the telescopic pipe will be blocked by this, so that the supply of pressurized air to the packer is stable and smooth as a whole. An anchor construction device excellent in workability can be obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a telescopic pipe.

FIG. 2 is a side sectional view of a swivel showing one embodiment of the present invention.

FIG. 3 is a side sectional view showing a guide tube driving step.

FIG. 4 is a side sectional view showing a water stop box attaching step.

FIG. 5 is a side sectional view showing a drilling step.

FIG. 6 is a side sectional view showing a tendon insertion step.

FIG. 7 is a side sectional view showing a casing extraction and pressure injection step.

FIG. 8 is a side sectional view showing a casing cutting step.

FIG. 9 is a side sectional view showing a packer shrinking step.

FIG. 10 is a side sectional view showing a final step of the packer.

FIG. 11 is a side sectional view when the telescopic pipe is contracted.

FIG. 12 is a side view of a partial cross section when the telescopic pipe is extended.

[Explanation of symbols]

 A: Swivel B: Water stop plate C: Drilling machine D: Steel pipe sheet pile E: Earth and sand F: Ground material G: Water stop material 1: Outer case 2 ... inner hole 3 ... socket 4, 7, 16, 17 ... passage 5, 8, 11 ... annular groove 6 ... air coupler 9a, 22 ... Teflon bearing 9b ... slide Ring 10 ... Adapter 12 ... Retaining ring 13,14 ... Screw hole 15 ... Inner hole 20 ... Inner swivel 21 ... Inner hole 23 ... Holding ring 25 ... Packer connection Bolt 30 ・ ・ ・ Main body 31 ・ ・ ・ Large diameter part 32 ・ ・ ・ Packer 33 ・ ・ ・ Packer pressurizing hose 40 ・ ・ ・ Guide cell 41 ・ ・ ・ Drive unit 42 ・ ・ ・ Drive shaft 43 ・ ・ ・ Guide tube 44: Metal crown 45: Check valve 46: Water stoppage Box 47 ... casing 48 ... Kronenburg bits 49 ... tendon 50 ... packer 51 ... telescopic pipes 51a, 51b, 51c ... rod

Claims (1)

(57) [Claims] 1. A swivel comprising an adapter and an outer case, wherein a screw hole is formed on one side of the adapter for screwing a drive unit of a drilling machine, and a casing is screwed on the other side. A screw hole to be combined and an inner hole are formed, an inner swivel is fixed to the inner hole, a packer connecting rod is provided in the inner hole of the inner swivel, and the outer case has A socket for water and grout material and an air coupler are fixedly provided, the socket is connected to an inner hole of the adapter, and the air coupler is connected to an inner hole of the inner swivel. And a packer provided in the guide are communicated with a telescopic pipe, and the telescopic pipe is configured such that each rod is configured to be extensible and rotatable mutually. An anchor construction device under pressured water.