JP2640842B2 - Construction method of assembly manhole and skeleton block for assembly manhole - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for constructing an assembling manhole in the ground and a skeleton block used for the construction.

<Prior Art> Conventional examples of this type of assembling manhole include, for example, Japanese Utility Model Publication No. Sho 58-3885 developed by the present applicant and Japanese Patent Laid-Open Publication No.
The techniques disclosed in JP-A-150831 and JP-A-59-228536 are known.

In this conventional assembly manhole, a hole is formed by excavating deeply in the ground in order to install a manhole in advance, a bottom plate is constructed at the bottom of the hole, and then a skeleton block, a straight wall tube, a slope wall tube is formed on the bottom plate. These parts are stacked and connected to each other via a connecting plate to form an assembling manhole, and the earth is buried back around the assembling manhole.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional assembly manhole, a hole having an inner diameter considerably larger than the outer diameter of the assembly manhole must be excavated in advance, so that the amount of excavated soil increases and workability is poor. There was a problem that the hole around the assembly manhole had to be backfilled.

In addition, in order to construct the shaft for the assembly manhole, in the place where the ground is bad, it is necessary to fix the wall of the hole by using a sheet pile, a liner plate, or the like, so that workability is poor and safety is required. There was a problem.

The present invention relates to a completely new technique developed in view of the above conventional problems.

<Means for Solving the Problems> According to the present invention, a skeleton block having a blade-shaped shoe at the lower end is buried in the ground, and a straight-wall pipe,
The sloping wall pipes and the like are sequentially laminated and tied together via a tie plate. Further, the skeleton blocks and the soil in the pipes such as straight wall pipes and sloping wall pipes are excavated and discharged, and these skeleton blocks are grounded. TECHNICAL FIELD The present invention relates to a method for constructing an assembling manhole, wherein the assembling manhole is constructed by gradually sinking into the inside, and a skeleton block used for constructing the assembling manhole.

<Operation> In the present invention, a skeleton block having a blade-shaped shoe at the lower end is used, so that the skeleton block can be submerged in the ground by its own weight or an external force. Since pipes and sloping pipes are tied through a tie plate, they can be connected easily and securely. Further, the soil in the building block, straight wall pipe, and sloping pipe is gradually excavated and discharged. These excavated soils allow these building blocks, straight wall pipes, inclined wall pipes, etc. to sink down very smoothly. Also, when a binding plate with an anti-rotation plate is used, the assembly manhole is prevented from rotating when it sinks, thereby changing the position direction of the inlet, outlet, etc., previously drilled in the building block etc. Can be prevented.

<Embodiment> A specific example of a method for constructing an assembly manhole according to the present invention will be described with reference to the drawings. In FIGS.
Is a frame block buried in the underground G, and a lower end thereof is fitted with a ring-shaped blade-like shoe 2 having a sharpened lower edge, and is fixed via bolts 3. Reference numeral 4 denotes a straight wall tube having the same diameter as the skeleton block 1. The straight wall tube is laminated on the skeleton block 1. The straight wall tube 4 and the skeleton block 1 are mutually connected by a binding plate 5 on the outer peripheral surface. Are tied. The binding plate 5 is integrally provided with a vertical rotation preventing plate 6 so that when the skeleton block 1 and the straight wall pipe 4 sink into the underground G, they do not rotate freely. It is configured to sink vertically. Reference numeral 7 denotes a slanted wall pipe laminated on the straight wall pipe 4, which is fastened to the straight wall pipe 4 via the fastening plate 5. A height adjustment ring 8 and a lid receiving frame 9 are mounted and fixed on the inclined wall tube 7 in this order.

In the construction of the assembling manhole of the present invention, a skeleton block 1 having an edged shoe 2 at the lower end is buried in the underground G, and a straight wall pipe 4 is placed on the skeleton block 1 on the surface of the ground via a binding plate 5. Tighten and excavate and excavate the soil in the skeleton block 1 and the straight wall pipe 4 to sink the skeleton block 1 and the straight wall pipe 4 into the underground G by their own weight or external force. When the block 1 and the straight-wall pipe 4 have settled to some extent, the sloping-wall pipe 7 is laminated on the straight-wall pipe 4 and the two are integrally fastened by the fastening plate 5. By discharging the soil in the sloping wall pipe 7, these are further submerged in the ground G. Subsequently, the adjusting ring 8 and the lid receiving frame 9 are sequentially mounted on the sloping wall pipe 7, and Fill the lower part with ready-mixed concrete and Forming a concrete base plate 10 provided integrally with the lower part of the building frame block 1 as shown in FIG. 2 by solidifying the discrete, can the entire assembly manhole for use in sewer or the like to assemble construction.

In the case where the assembly manhole according to the present invention is used as a shaft used for propulsion work and the assembly manhole is buried when used, the bottom
Of course, the inclined wall tube 7, the adjusting ring 8, the lid receiving frame 9, and the like can be omitted.

Further, in the above embodiment, the bottom plate 10 is formed by injecting and solidifying fresh concrete, but this bottom plate 10 is composed of a plurality of blocks of the bottom plate 10 previously divided into a plurality of blocks.
At the bottom of the is connected to each other and assembled,
Alternatively, it can be constituted by connecting and solidifying a chestnut stone, a block or the like at the bottom of the skeleton block 1 via concrete.

As described above, the skeleton block 1 used in the present invention is formed by fitting a separately manufactured ring-shaped blade-like shoe 2 to the lower end of the skeleton block 1 and integrally fixing the same with bolts 3. However, as shown in FIG. 3, an edge-shaped shoe 2a having an upright ring 11 on the upper inner peripheral surface is used, and the upright ring 11 of the edged shoe 2a is used to form the skeleton block 1 when the skeleton block 1 is formed.
It is also possible to embed in the lower part of this and to integrally mold with the skeleton block 1.

<Effect of the Invention> As described above, the method for constructing an assembly manhole according to the present invention submerges a skeleton block having an edged shoe at the lower end into the ground using this edged shoe, and within and between the skeleton block. Since the soil in the stacked straight wall pipes is configured to be excavated and discharged, these pipes can be gradually settled deeper and deeper into the ground by excavating and discharging the soil. The outer diameter of the assembled manhole is sufficient, the excavation diameter can be significantly reduced, and the amount of earth removal can be reduced. In addition, since the walls such as the skeleton block and the straight wall pipe have a soil retaining effect, as in the conventional case, There is no need to install sheet piles, liner plates, etc. around the holes for earth retaining,
As a result, the construction period can be remarkably shortened and highly economical construction can be carried out. Further, safe work can be performed even in extremely deep manholes. It is characterized by being less susceptible to the effects of

[Brief description of the drawings]

1 and 2 are partial explanatory views showing a construction method of the present invention, and FIG. 3 is an explanatory view of another example. 1 is a building block, 2 and 2a are bladed shoes, 4 is a straight wall pipe, 5 is a binding plate, 6 is a rotation prevention plate, 7 is a sloping wall pipe, 8 is an adjustment ring, 9 is a lid receiving frame, 10 is a bottom plate, 11 is a standing ring.

Claims (4)

(57) [Claims] 1. A skeleton block having a blade-shaped shoe at its lower end is buried in the ground, and a straight-wall pipe, an inclined-wall pipe, and the like are sequentially laminated on the skeleton block on the surface of the ground, and a binding plate is attached to the pipe. To form an assembling manhole by gradually sinking these building blocks, etc., into the ground while excavating and discharging soil inside the building blocks and pipes such as straight-wall pipes and sloped-wall pipes. Construction method of assembly manhole characterized by the following. 2. A bottom plate is formed at a lower portion of an assembling manhole by injecting and solidifying concrete or the like into a lower portion of the body block or assembling a plurality of divided bottom plates. The construction method of the assembling manhole described. 3. The straight wall pipe and the inclined wall pipe laminated on the skeleton block are fastened on their outer peripheral surfaces by a fastening plate having a rotation preventing plate. Construction method of assembly manhole. 4. A body block for an assembling manhole, wherein a ring-shaped blade-shaped shoe having a lower edge formed in a pointed blade shape is integrally attached to a lower edge of a cylindrical body.