JP2735871B2 - Hollow body drilling method and drilling equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for excavating an existing culvert of an aged sewer pipe, that is, a hollow body excavation method for replacing an existing hollow body underground, and an excavating apparatus therefor. is there.

(Conventional technology) Explaining a conventional example of excavation accompanying the replacement of an existing culvert, the existing culvert has already been drilled.
It is necessary to form a closed chamber in front of the excavator to prevent collapse of the excavation part and its surroundings. As shown in FIG. 3, a sealing material (rubber or the like) (5) is provided in front of the excavator (1). The existing culvert (10) is hermetically sealed with a sealing material (5), and a digging closed chamber (a) is formed in front of the digging machine (1), and a cutter head (2) with a cutter (3) is formed. The existing culvert (10) and its surroundings are excavated and removed and excavated by the rotation of the shaft, and a hollow culvert excavation method and apparatus for laying a new culvert behind the excavator (1). Sealing material (5)
Is propelled in the existing culvert (10) together with the excavator (1).

(Problems to be Solved by the Invention) In the conventional existing culvert, that is, in the excavation and removal of the existing hollow body and the laying of a new hollow body, the inner surface of the existing hollow body is deteriorated due to aging of the existing hollow body, adhesion of sludge, and the like. Due to the uneven shape on the side, the sealing performance of the sealing material (rubber, etc.) is reduced, the pressure in the excavation closed chamber at the front of the excavator becomes unstable, and the excavation area and its surroundings are liable to collapse, reducing the efficiency of excavation. There are problems such as adversely affecting the laying of a new hollow body.

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the above-described problem. The object of the present invention is to provide a seal arrangement by advancing a pair of front and rear sealing walls in an existing hollow body, and providing the sealing wall. Filling the stabilizing material in between to form a sealed chamber, enhances the sealing performance of the excavated closed chamber in front of the excavator, stabilizes the pressure, improves excavation and excavation, and facilitates the laying of a new hollow body. An object of the present invention is to provide a hollow body excavation method and an excavation device thereof with improved efficiency.

(Means for Solving the Problems) The present invention relates to a hollow body excavation method in which an existing hollow body underground is excavated by an excavator and removed, and a new hollow body is laid on the rear side of the excavator. In the existing hollow body, a pair of front and rear sealing walls are advanced and arranged in a sealed manner, a stabilizer is filled between the sealing walls to form a sealed sealed chamber, and a sealed closed chamber is provided by the sealed sealed chamber in front of the excavator. A hollow body excavation method characterized by the configuration of forming and excavating, a pair of front and rear sealing walls are advanced in the existing hollow body and a seal is provided,
By filling the space between the sealing walls with a stabilizer to form a sealed chamber, the sealing performance of the excavated chamber at the front of the excavator is improved,
It stabilizes pressure, making drilling, drilling and laying new hollow bodies easy and smooth.

In addition, while excavating and removing the existing hollow body underground by an excavator and laying a new hollow body behind the excavator, in the hollow body excavator, in front of the excavator, in the existing hollow body A pair of front and rear sealing walls that are moved forward and arranged to form a sealed chamber are disposed via a forward mechanism, and a hollow body excavating apparatus characterized in that a stabilizing material filling mechanism is attached to the closed wall, Advancing the pair of front and rear sealing walls by the advancing mechanism, disposing the seal, and injecting and filling the stabilizing material between the sealing walls by the stabilizing material filling mechanism facilitates formation of the advancing sealing chamber and increases reliability. I have.

(Operation) In the existing hollow body, a pair of front and rear sealing walls are advanced and disposed in a seal, and a sealant is filled between the sealing walls to form a sealing chamber, which is filled together with the seals of both sealing walls. Excellent sealing performance is obtained by the stabilizing material, and the excavation sealed room formed at the front of the excavator by the sealed sealing room has improved sealing performance, stabilizes the pressure in the same room, and effectively prevents collapse The excavation by the excavator, excavation and the laying of a new hollow body are smoothly performed, and the use of a pair of front and rear sealing walls allows advance formation of the sealed chamber during excavation as needed. Excavation and hollow body laying are performed continuously.

The advancing mechanism facilitates and reliably advances and disposes the pair of front and rear sealing walls, and the stabilizer filling mechanism injects and fills the stabilizing material from the sealing wall to the sealing wall. It is freely adjusted according to the pressure in the room, and the advancing arrangement of the sealing wall and the filling of the stabilizer are easy.

(Embodiment) Figs. 1 and 2 show an embodiment of a hollow body excavation method and an excavation device thereof according to the present invention, wherein (1) is an excavator,
(2) is a cutter head provided with a cutter (3) which is disposed in front of the excavator and is driven to rotate. (11) is an existing hollow body through which the cutter head (2) is inserted from the center of the excavator (1). (Ten)
A drain pipe protruding from the center axis of the drain pipe (11)
A plurality of fixing jacks (18
a) a slide cylinder (12), a slide cylinder (13) with a plurality of fixing jacks (18b) slidably fitted to the slide cylinder (12) via a seal ring (13a), and a slide cylinder ( It consists of a moving jack (18c), etc., connected between the 12) and the sealing wall (15a).
And sealing walls (15b) and (15a) at the rear end of (13),
Forward and backward pair of closed walls (15a, 15b) (11,12,1
3,18a, b, c), and a stabilizer injection port (19) connected to a stabilizer supply mechanism (not shown) is disposed on the closed wall (15a) to provide a stabilizer filling mechanism (19). Etc.) and a closed wall (15a) (1
Peripheral seals (16) and (16) are provided on the outer periphery of 5b), and the existing underground hollow body (10) is excavated and removed by the excavator (1), and a new one is installed on the rear side of the excavator (1). In a hollow body excavation method for laying a hollow body (not shown), a pair of front and rear sealing walls (15a) and (15b) are advanced and sealed in the existing hollow body (1), and the sealing wall (15a) ( 15) Filling a stabilizer between them to form a sealed closed chamber (b), and forming a closed closed chamber (a) in front of the excavator (1) by the sealed closed wall (b) to excavate a hollow body It is a construction method.

In addition, an existing hollow body (10) underground is excavated and removed by an excavator (1), and a new hollow body is laid on the rear side of the excavator (1). ), A pair of front and rear sealing walls (15a) and (15b) which are advanced and sealed in the existing hollow body (10) to form a sealing chamber (b) are formed by a forward mechanism (11,12,13,13). 18a, b, c), and is a hollow body excavator in which a stabilizing material filling mechanism (19 etc.) is attached to a sealing wall (15a).

The hollow body excavator is described in more detail below.
As shown in the figure, the excavator (1) is provided with a thrust by means such as a shield jack (not shown) and rotates a cutter head (2) with a cutter (3) disposed at a front portion thereof by a rotating mechanism (not shown). To excavate the existing hollow body (10) and also appropriately excavate the ground (30) around the outside of the hollow body (10). As a result, it is discharged to the rear of the excavator (1) and excavates.

Furthermore, a drain pipe (11) is largely protruded forward from the center of the excavator (1) by an appropriate support mechanism, and the drain pipe (11) is arranged coaxially with the existing hollow body (10). The slide pipe (12) slidably fitted to the drain pipe (11) has a plurality of fixing jacks (18a) that abut against the inner surface of the existing hollow body (10) and radiate forward. The sealing wall (15b) is fixed to the rear end. The slide cylinder (12) has a seal ring (13a)
A slide cylinder (13) with (13b) is slidably fitted, and a plurality of slide cylinders (13) are fixed to the slide cylinder (13) by abutting against a sealing material (20) provided on the inner surface of the existing hollow body (10). A fixing jack (18b) is radially disposed on the front side, a sealing wall (15a) is fixed at the rear end, and an inlet (19) for a stabilizer is attached to the jack (18b). 19) is connected to an appropriate stabilizer supply mechanism (not shown) to form a stabilizer filling mechanism (19 or the like). The stabilizer is filled between the sealing walls (15a) and (15b) to seal the sealed chamber ( b). A moving jack (1) connected between the slide cylinder (12) and the sealing wall (15a)
According to 8c), the sealing walls (15a) and (15b) are advanced alternately.

The sealing walls (15a) and (15b) each have a peripheral seal (16) provided in a peripheral portion, and the peripheral seal (16)
Is a mechanism which is largely expanded and contracted in the radial direction by an appropriate means, and has a mechanism having elasticity and flexibility by rubber or the like, and a seal material (20) provided at an appropriate interval on the inner surface side of the existing hollow body (10). ) Adhering to the inner surface of) and exhibiting excellent sealing properties.

The hollow body excavation method according to the embodiment of the present invention and the operation of the excavator will be described in detail. As shown in FIG. 2 (A), the inner surface side of the existing hollow body (10) has an uneven shape. The sealing material (20) is intermittently applied to the inner surface of the existing hollow body (10) by an appropriate material means, so that the sealing property is improved.

Extend the fixing jack (18a) to the existing hollow body (10)
When the slide cylinder (12) is fixed to the inner surface of the cylinder and the moving jack (18c) is shortened, the sealing wall (15a) is moved forward together with the sliding cylinder (13) and the fixing jack (18b). (15a) is disposed in the front of the seal material (20), and is fixed by the extension of the fixing jack (18b). The fixing jack (18a) is shortened to allow the slide cylinder (12) to slide. And the jack for moving (18
When c) is extended, the sealing cylinder (13) fixed by the fixing jack (18b) advances the sealing wall (15b) together with the sliding cylinder (12) and the fixing jack (18a), and the sealing wall (15b) Is disposed in the rear part of the sealing member (20), is provided at an appropriate distance from the sealing wall (15a) to form a desired sealing chamber (b), and is provided with a fixing jack (18).
It is fixed by the extension of a). Next, a stabilizer is supplied and filled into the seal closed chamber (b) from the injection port (19). The sealing chamber (b) has excellent sealing performance by filling with a stabilizing material, as well as sealing by the sealing material (20) and the peripheral seal (16). The sealing machine (1), that is, the cutter head (2) A digging closed chamber (a) having a desired volume is formed on the front side (see FIG. 2A).

In FIG. 2 (A), thrust is given by an appropriate means of the excavator (1), and the cutter head (2) is driven to rotate so that the existing hollow body (10) and the ground (30) around the outside thereof are also efficiently operated. When excavation and excavation are performed and the excavation proceeds as shown in FIG. 2 (B), the fixing jack (18b) is shortened to make the slide cylinder (13) and the sealing wall (15) slidable, and the moving jack ( 18c) is shortened and the sealing wall (15a), the slide cylinder (13), and the fixing jack (18b) are advanced and the sealing wall (1
5a) is placed in the front part of the front sealing material (20), and the fixing jack (18b) is extended and fixed (see FIG. 2C).

Next, as shown in FIG. 2 (D), when the fixing jack (18a) is shortened to make the slide cylinder (12) and the sealing wall (15b) slidable, and the moving jack (18c) is extended, The slide cylinder (12), the sealing wall (15b), and the fixing jack (18a) are advanced, and the sealing wall (15b) is arranged in the rear part of the front sealing material (20), and the fixing jack (18a) is removed. When extended and fixed, the sealing walls (15a) and (15b) are advanced by the pitch of the sealing material (20) as shown in FIG. 2 (E) to supply a stabilizing material into the sealing chamber (b). , And the process of advancing the closed walls (15a) (15b) is completed in one cycle.

The sealing walls (15a) and (15b) are alternately disposed and fixed alternately, and one of the sealing walls appropriately secures the sealing property of the excavation sealing chamber (a) even during the forward movement. Excavation of the existing hollow body (10), its outer periphery,
Excavation is performed continuously, and during the excavation, the construction of a new hollow body (not shown) is smoothly performed by appropriate means in the rear portion of the excavator (1).

The excavated closed chamber (a) supplies muddy water and the like by appropriate means to maintain a desired pressure to prevent collapse and the like, thereby facilitating excavation, and also supplies muddy water and the like as a stable material in the sealed closed chamber (b). , Filling (replacement with air), and making the pressure equal to that of the excavation closed chamber (a), the pressure in the excavation closed chamber (a) is stabilized, and the collapse is effectively prevented, so that the excavation and excavation can be performed smoothly. Is done.

When the sealing wall (15b) advances, the stabilizer in the sealing chamber (b) flows from the periphery into the excavation sealing chamber (a) and is effectively used as a face stabilizer. In addition, sealing wall (15a) (15b)
The peripheral seal (16) provided in the periphery of the seal can be largely expanded and contracted in the radial direction by a suitable fluid pressure supply means or the like, and is made of a flexible material or the like to enhance the sealing property. The sealing property is further enhanced by the filled stabilizer, and the object of the present invention can be achieved without applying the sealing material (20).

(Effects of the Invention) The present invention has the above-described configuration, and excavates and removes an existing hollow body underground by an excavator, and a new hollow body is laid on the rear side of the excavator, and the existing hollow body is constructed. In the body, a pair of front and rear sealing walls are advanced and arranged in a seal, and a sealing material is filled between the sealing walls to form a sealing chamber. A sealing chamber is formed by the sealing chamber in front of the excavator. The sealing performance of the excavated enclosure is greatly enhanced by the excavation and the sealing by the stabilizer filled together with the sealing of the pair of front and rear sealing walls themselves, and the stabilizer is also used as a face stabilizer, and The pressure is secured to a desired value and stabilized, and face collapse is effectively prevented.Advancing of both sealing walls and filling of stabilizers are performed at any time during excavation, and excavation and excavation performance are significantly improved. Making it easier to lay new hollow bodies Efficiency is enhanced.

[Brief description of the drawings]

1 is a longitudinal sectional view showing an embodiment of the present invention, FIGS. 2 (A) to 2 (E) are longitudinal sectional views showing respective excavation steps, and FIG. 3 is a longitudinal sectional view showing a conventional example. . 1: excavator, 10: existing hollow body, 15a, 15b: closed wall, 11, 12, 13, 18, a, b, c: forward mechanism, 19: stabilizer filling mechanism, a: excavated closed chamber, b: sealed closed Room.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Kazumi Shino 2-5-8 Kitaaoyama, Minato-ku, Tokyo, Japan Intra-company group (72) Inventor Yasuaki Takenouchi 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Co., Ltd. (56) References JP-A-62-264293 (JP, A) JP-A-61-79075 (JP, A) JP-A-55-43119 (JP, U)

Claims (2)

(57) [Claims] An excavation method for excavating an existing hollow body underground by an excavator and laying a new hollow body behind the excavator, wherein a pair of front and rear hollow bodies are installed in the existing hollow body. The sealing wall is advanced by placing the seal, the stabilizer is filled between the sealing walls to form a sealing chamber, and the sealing chamber is formed in the front of the excavator to excavate. Features a hollow body excavation method. 2. An excavator for excavating an existing hollow body underground by an excavator and laying a new hollow body on the rear side of the excavator.
A pair of front and rear sealing walls that are advanced and sealed in the existing hollow body to form a sealed chamber via a forward mechanism, and a stabilizer filling mechanism is attached to the closed wall; Body rig.