JP3282978B2 - Manhole, manhole frame, manhole construction method and underground structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole, a manhole skeleton block, a manhole construction method, and an underground structure for swiveling a cylindrical member such as a manhole into the ground.

[0002]

2. Description of the Related Art Conventionally, in general, when a manhole is constructed, a shaft is provided, and a soil pile is constructed by a steel sheet pile method, a lightweight steel sheet pile method, a wood sheet pile method, an H steel horizontal sheet pile method, a liner plate method, or the like. After excavation, the foundation concrete is cast, small-diameter propulsion work is performed, and sewer pipes are laid. Then, manholes are installed. Examples of those that do not require small-diameter propulsion work include paragraphs [0018] to [00] of JP-A-6-346683.
23], and basically excavate a shaft protected by the earth retaining body while stacking and press-fitting the earth retaining elements 1, 3, 5, 7 in order every time the earth is excavated by a predetermined depth. And
After inserting the manhole 45 into the shaft,
In some cases, the retaining element is extracted.

[0003]

However [0005] In the above manhole construction method or the like, once, on that construction of earth retaining, by shall be installed manhole or the like or the like therein, a private range to be used in construction However, the existing houses and facilities will be damaged, traffic will be hindered, and nearby residents will be inconvenienced. In addition, construction and removal of earth retaining members, installation of manholes, etc.
Since various complicated steps must be taken, the construction period is long and the construction cost is high. Even when performing small-diameter propulsion work, inflow of earth and sand is a problem because the vehicle starts from the earth retaining member.

[0004]

The most important feature of the present invention is to solve the above-mentioned problems by a technical idea that the manhole frame itself is swirled and pressed directly into the ground .

[0005] The above problem can be appropriately solved by a method of swiveling and press-fitting the manhole body itself into the ground. That is, the invention of 請 Motomeko 1 includes a step of performing initial drilling with the drilling machine, the lower portion of cylindrical shape having a step of installing the turning press-machine having a swivel actuator and the lifting actuator on its center, the digging edge at the lower end Tightening the manhole body with the holding member of the swivel press-in machine, turning the holding member with the swivel actuator, and pressing down the holding member with the elevating actuator to perform swiveling press-fitting to the excavation depth; and excavating with the excavator And after the excavation, on the lower manhole frame,
At least an appropriate number of cylindrical intermediate manhole bodies are connected, the holding member is released, the holding member is raised by the elevation actuator, the intermediate manhole body is tightened by the holding member of the swivel press machine, and swivel to the excavation depth. The step of performing press-fitting, the step of performing excavation with the excavator, and after the excavation is completed, a cylindrical connecting casing is detachably connected to the intermediate manhole frame, the holding member is released, and the lifting / lowering actuator is used. Raising a holding member, tightening the connecting casing with the holding member of the swivel press machine, performing a swirl press fit to an arbitrary excavation depth, a step of excavating with the excavator, and after the excavation to a predetermined depth,
A method of constructing a manhole, comprising: a step of connecting an upper manhole body to the intermediate manhole body; and a step of removing the connecting casing from the intermediate manhole body. In addition, as a matter of course, the number of connected intermediate manhole frames is appropriately selected depending on the construction scale.

There is also a construction method which does not require an intermediate manhole unlike the invention described in claim 1 . That is, claim 2
The described invention is a step of performing initial digging with an excavator, a step of installing a slewing press having a slewing actuator and a lifting actuator on the center thereof, and a cylindrical lower manhole body having a digging blade at a lower end, Tightening with the holding member of the swivel press machine, turning the holding member with the swivel actuator, pushing down the holding member with the elevating actuator to perform swiveling press to the excavation depth, excavating with the excavator, After completion, a cylindrical connecting casing is detachably connected to the lower manhole body, the holding member is released, and the holding member is raised by the elevating actuator, and the connecting casing is held by the holding member of the swivel press-fitting machine. Tightening and swiveling press-fitting to an arbitrary excavation depth; excavating with the excavator; After the end of excavation, the step of connecting the upper manhole precursor to the lower manhole skeleton, a manhole construction method, characterized in that it and a step of removing the coupling casing from the lower manhole precursor.

[0007] invention 請 Motomeko 3 wherein has established a pivot press fitting machine having a pivoting jacking and pressed jack manhole installation site, small a connecting member having a reinforcement of the blade-to upper end to the lower end Holding the first manhole frame block also serving as a swivel press shaft having a water stop to which a bore pipe can be connected, with a holding portion of the swivel press machine, and driving the press-in jack and the swirl jack to drive the first manhole block. Performing swivel press of the manhole skeleton block, excavating by an excavator, connecting the second manhole skeleton block also serving as a swivel press-in shaft having a connecting member with a reinforcing bar at least at the lower end with the first manhole skeleton block, The press-in jack and the slewing jack are driven to perform swivel-pressing of the manhole skeleton block, and a small-diameter pipe propulsion device is installed inside the manhole skeleton block. Fixed, propels while connecting the small diameter tube by said small diameter pipe propulsion device, then, a manhole construction method, characterized in that they have installed manhole launched to the surface portion. The invention according to claim 4 is characterized in that a reinforcing bar is fixed to a steel ring member, the reinforcing bar is buried in an upper end portion of an annular block, and a blade-like member is attached to a lower end portion of the block, and the block is attached. A through hole is drilled in the wall of the wall, and a water stop device capable of connecting a small-diameter pipe is fixed to the through hole. Buried ,
The reinforcing bar is a reinforcing bar, and the length of the reinforcing bar is the annular member.
The manhole frame is characterized by being longer than the vertical length of the manhole. The invention according to claim 5 is characterized in that a first reinforcing bar is fixed to a steel first annular member, the first reinforcing bar is buried in an upper end portion of an annular block, and a steel second annular member is provided. A second reinforcement is fixed to the lower end of the block, and the second reinforcement is buried at the lower end of the block. Further, a manhole / turning press-fitting shaft, wherein the reinforcement is vertically buried inside the block , serial reinforcement is rebar, is characteristic and to luma Nhoru building frame block is longer than the vertical length of the iron muscle length the annular member.

[0008]

Manhole 1 shown in FIG 1 DETAILED DESCRIPTION OF THE INVENTION, the lower manhole framework 2 (this is what is communicated and connected respectively with small propulsion tube 4 a, 4 b through the water stopping device 3) ,
An intermediate manhole frame 5 is connected to the lower manhole frame 2 by welding, and an upper manhole frame 6 is connected to the upper portion of the intermediate manhole frame 5 by welding. Underwater concrete 7 is cast at the bottom of the lower manhole frame 2, and an invert 8 is placed thereon.

In the lower manhole frame 2 shown in FIG. 2, a steel blade member 21 is fitted and fixed to the lower end of a cylindrical concrete 20, and a steel cylindrical member 22 is fitted and fixed to an upper edge. Is what it is. Reinforcing bars 28 as reinforcing bars are vertically fixed (welded) to the inner peripheral surface of the upper end of the cylindrical steel blade member 21 at predetermined intervals, and they are buried and integrated with the peripheral edge of the lower end of the cylindrical concrete 20. ing. Similarly, reinforcing rods 28 as reinforcing bars are vertically fixed (welded) to the inner peripheral surface of the steel cylindrical member 22 at predetermined intervals, and they are buried and integrated with the peripheral edge of the upper end of the concrete 20. At the lower end of the blade-shaped member 21, a plurality of saw teeth are arranged circumferentially. Concrete 2
The lower end of 0 has a tapered inner peripheral surface to reduce the resistance at the time of swivel press fitting. The above components are integrally manufactured in a manhole manufacturing process to form the lower manhole frame 2. In addition, two through holes are formed in the wall of the lower manhole frame 2, and the water stop 3 is fixed to the through holes. Since the water stopping unit 3 are crowded Kumi previously attached to the lower Buma Nhoru framework 2, when the mirror cutting at the start of the small-diameter jacking method,
Water and earth and sand do not penetrate into the manhole, enabling smooth small-diameter propulsion work.

In the intermediate manhole structure 5 shown in FIG. 3, steel cylindrical members 51, 5 are provided at the upper and lower ends of concrete 50.
2 are fitted and fixed, respectively, and the intermediate manhole frame 5 is composed of a lower manhole frame 2 and an upper manhole frame 6.
Are vertically connected by welding. The welding prevents separation of the frames, facilitates transmission of strong swiveling pressure, and enables stable swiveling press-fitting. Reinforcing bars 58 serving as reinforcing bars are vertically fixed (welded) at predetermined intervals to the inner peripheral surface of the lower end of the steel cylindrical member 51, and they are buried and integrated with the peripheral edge of the lower end of the cylindrical concrete 50. . Similarly, reinforcing bars 58 as reinforcing bars are vertically fixed at predetermined intervals to the inner peripheral surface of the steel cylindrical member 52 (welding), and they are embedded in the peripheral edge of the upper end of the cylindrical concrete 50. A male guide cotter 53,
The female guide cotters 55 and 56 are arranged alternately, are convenient for alignment, are hard to come off, and easily transmit a strong rocking pressure. Each is provided with a bolt mounting hole 57, and the shift of the guide cotter can be prevented by the bolt and the nut.

The upper manhole frame 6 shown in FIG. 1 includes an adjusting portion 61 vertically connected to the upper end of the intermediate manhole frame 5, a side mass 60 vertically connected to the upper end of the adjusting portion 61, and a side mass 60.
A receiving frame 62 is fixed to an upper end of the receiving frame 62 with bolts, nuts, and washers (not shown), and a lid 68 is detachably attached to the receiving frame 62. A step 69 is provided on the inner peripheral surface of the upper manhole frame 6. Step 69 is attached in the final step of the manhole construction work, and is attached only to the upper half.

The steel-made connecting casing 100 shown in FIG.
Male guide cotters 103 and 104 having bolt mounting holes 107 and female guide cotters 105 and 106 are provided at the lower end. The connection casing 100 is detachably connected to the intermediate manhole frame 5. That is, the two can be joined together in a dimensional manner, the male guide cotters 53 and 54 are fitted with the female guide cotters 105 and 106, and the female guide cotter 5 is fitted.
5 and 56 and the male guide cotters 103 and 104 are fitted , and are further fixed with bolts and nuts through the bolt mounting holes 57 and 107.

The swivel press-fitting machine 10 shown in FIGS. 5 to 7 will be described in detail by a base frame 12 provided with outriggers 11 at four corners, an elevating cylinder 13 provided on the base frame 12, and an elevating cylinder 13. As shown in FIG. 3, the lifting table 14 is connected horizontally so as to be driven up and down in the Y direction, is horizontally disposed, and is provided with a hole in the center capable of receiving the manhole frame.
As shown in FIG. 5, a holding ring 15, which is rotatably connected in the direction A as shown in FIG. 5 via a bearing, and which is turned by a gear mechanism or a gear mechanism (not shown), and a holding ring 1.
5 and a hydraulic motor 18 driven by a gear mechanism or a gear mechanism (not shown) via a speed reducer 17. Further, there is provided a rotational reaction force removing device 19 for preventing the press-fitting machine 10 from being laterally displaced or floating due to the turning of the holding ring 15. Note that a hydraulic source (not shown) for supplying power is provided. The lifting cylinder 13 raises and lowers the manhole body by operating a lifting switch of a control unit (not shown), and the hydraulic motor 18 rotates by operating a rotation switch. The chuck device 16 is operated by operating a chuck switch of a control unit (not shown). In the embodiment, the swivel press machine 10 is manufactured and used as a dedicated machine of the present invention. However, the present invention is not limited to this, and is not limited to a general swivel press machine used in a conventional method. By attaching the attachment inside the holding portion, swivel press-fitting can also be realized.

Next, the construction procedure of the embodiment will be described. Check for existing buried objects (gas pipes, water pipes, etc.)
1.2-in advance for the installation of the lower manhole frame 2
The initial excavation is about 1.5m. The position of the manhole 1 is determined, and the manhole 1 is installed so that the center of the turning press-fitting machine 10 coincides with the center.

FIG. 2 shows a small crane (not shown).
The lower manhole frame 2 shown in (a) to (c) is lifted and moved, and the lower manhole frame 2 is placed inside the holding ring 15.
Is set.

By holding and holding the lower manhole frame 2 with the holding ring 15 and operating the elevating switch and the swivel switch (not shown), the elevating cylinder 13 pushes down the elevating table 14 and the hydraulic motor 18 15 is swiveled and press-fitted to a predetermined depth. Excavation is performed by the excavator 40 (see FIG. 8) .

FIG. 3 shows a small crane (not shown).
The intermediate manhole frame 5 shown in (a) to (d) is lifted and moved, and placed on the lower manhole frame 2,
By welding the cylindrical member 22 and the cylindrical member 51,
The lower manhole frame 2 and the intermediate manhole frame 5 are fixed vertically.

The holding ring 1 is released by releasing the chuck device 16.
Then, the lifting table 14 and the holding ring 15 are raised by the lifting cylinder 13 and stopped. The intermediate manhole skeleton 5 is swirled and pressed in the same manner as described above. Excavation is performed by the excavator 40. Fig. 8 shows the construction status in this process.

FIG. 4 shows a small crane (not shown).
The connecting casing 100 shown in (a) to (c) is lifted and moved to insert the male guide cotters 103 and 104 into the female guide cotters 55 and 56, and to fit the female guide cotters 105 and 106 with the male guide cotters 53. , 5
4 and fit. Bolt mounting holes 57, 10 7
Then, the intermediate manhole frame 5 and the connection casing 100 are vertically connected by fixing a bolt with a screw nut.

The swiveling press-fitting of the connecting casing 100 is performed in the same manner as described in the above.

The foundation underwater concrete 7 is poured while confirming the design depth of the excavation. A small propulsion machine (not shown) is set on the basic underwater concrete 7 and the main pipe is propelled while drilling a horizontal hole, and the small propulsion pipes 4a, 4
b. The small propulsion machine is removed, mortar for height adjustment is installed, and the invert 8 is installed.

The upper manhole frame 6 is mounted on the intermediate manhole frame 5. That is, the adjustment unit 61, the side mass 60, the receiving frame 62, the lid 68, and the step 69 are attached. The thus constructed construction is shown in FIGS. 9 and 10.

[0023] (10) connected to release a connection with the cock motor the casing 100 and the intermediate manhole skeleton 5, after construction backfill soil, and removed to separate the coupling casing 100 from the intermediate manhole skeleton 5, manhole construction Complete the construction.

Although the intermediate manhole frame 5 is employed as a component of the present embodiment, a construction method that does not use the intermediate manhole frame 5 is also possible. Instead, the adjusting section 61 is made to be long. It is also possible that one connecting casing 100 is added and connected. Since the structure and construction method of the manhole frame are the same as those in the above-described example, the description is omitted.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and may be implemented in many technical forms without departing from the technical spirit of the present invention. Of course, changes can be made.
As an example, the cylindrical members 22, 51, 52 may be provided not on the outer peripheral edge of the manhole frame but on the inner peripheral edge. Instead of drilling a bolt mounting hole in the guide cotter, it is also preferable to drill a bolt mounting hole in the cylindrical member 52 and connect them with a tightening bolt, a tightening nut, and a tightening plate. As a substitute for the bolt and nut, it is also preferable to fix the male guide cotter and the female guide cotter by welding.
Reinforcing bars may be attached only to the joint surface between the manhole frames. Further, the cylindrical members 22, 51, 52 may be configured to be continuous so as to cover the entire outer peripheral surface of the manhole frame. The manhole body itself is not limited to concrete, but may be other materials suitable for swivel press fitting, such as ductile, FRP, steel, etc., and is not limited to the materials of the embodiment. Further, the number of through holes is not limited to two, and any number of through holes can be employed.

[0026]

As described above, claims 1 to 5
The invention described in (1) has the effect that the manhole frame etc. can be directly pressed into the ground with a rotary press-in machine, shortening the construction period, shortening the period of suspension of traffic, reducing construction costs, providing an economical construction method, and reducing the area dedicated to construction. There is. Further, the joint strength of the manhole frame is increased, and there is an effect that the earthquake resistance and the like are improved. As described above, the industrial utility value of the present invention is great.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional perspective view of a manhole in a state after a manhole frame is connected and buried in the ground.

FIG. 2A is a plan view of a lower manhole frame, and FIG.
FIG. 3 is a front view of the lower manhole frame, and FIG. 3C is a partial longitudinal sectional view of the lower manhole frame.

FIG. 3A is a plan view of an intermediate manhole structure, and FIG.
3 is a front view of a male guide cotter, (c) is a front view of an intermediate manhole frame, and (d) is a partial longitudinal sectional view of the intermediate manhole frame.

4A is a plan view of a connecting casing, FIG. 4B is a front view of a male guide cotter, and FIG. 4C is a front view of the connecting casing.

FIG. 5 is a plan view of the swivel press-fitting machine.

FIG. 6 is a front view of the swivel press-fitting machine.

FIG. 7 is a right side view of the swivel press-fitting machine.

FIG. 8 is an explanatory front view of a construction state in which swivel press-fitting is performed by the swivel press-fitting machine.

FIG. 9 is a front view of the manhole frame before the connection casing is removed.

FIG. 10 is a longitudinal sectional view of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 2 Lower manhole frame 3 Water stop device 4a, 4b Forehead propulsion pipe 5 Intermediate manhole frame 6 Upper manhole frame 7 Underwater concrete 8 Invert 10 Swing press machine 21 Blade member 22, 51, 52 Cylindrical member 20, 50 Concrete 40 Excavator 53,54,103,104 Male guide cotter 55,56,105,106 Female guide cotter 57,107 Bolt mounting hole 28,58 Reinforcing bar

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 29/12 E21B 7/20

Claims (5)

(57) [Claims] A step of performing an initial excavation by an excavator; a step of installing a swivel press-fitting machine having a swivel actuator and an elevating actuator on the center thereof; and a cylindrical lower manhole body having an excavation blade at a lower end thereof. Tightening with a holding member of a turning press machine, turning the holding member with the turning actuator, and pressing down the holding member with a lifting actuator to perform swiveling press-fitting to an excavation depth; excavating with the excavator; After the end, at least an appropriate number of cylindrical intermediate manhole bodies are connected on the lower manhole body, the holding member is released, and the holding member is raised by the lifting / lowering actuator, and the intermediate manhole body is turned by the turning press machine. A step of performing press-fitting to the excavation depth by tightening with the holding member of When, after the end of excavation, the intermediate manhole skeleton connecting casing cylindrical and detachably connected to the body, to increase the holding member with the lift actuator to release the holding member,
Tightening the connection casing with a holding member of the swivel press-in machine, performing swivel press-in to an arbitrary excavation depth, excavating with the excavator, and after completion of the excavation to a predetermined depth, an upper manhole in the intermediate manhole frame. A method of constructing a manhole, comprising: a step of connecting a frame; and a step of removing the connection casing from the intermediate manhole frame. 2. A step of performing initial digging with an excavator, a step of installing a slewing press-fitting machine having a slewing actuator and a lifting / lowering actuator on the center thereof, and a cylindrical lower manhole body having a digging blade at a lower end thereof. Tightening with a holding member of a turning press machine, turning the holding member with the turning actuator, and pressing down the holding member with a lifting actuator to perform swiveling press-fitting to an excavation depth; excavating with the excavator; After the end, a cylindrical connecting casing is detachably connected to the lower manhole body, the holding member is released, and the holding member is raised by the lifting actuator,
Tightening the connection casing with a holding member of the swivel press machine, performing swivel press to an arbitrary excavation depth, excavating with the excavator, and after completion of the excavation to a predetermined depth, an upper manhole in the lower manhole frame. A step of connecting a skeleton, and a step of removing the connection casing from the lower manhole skeleton . 3. A swivel press machine having a press-in jack and a swivel jack is installed at a manhole installation location, and a small-diameter pipe is connected with a connecting member provided with a blade-shaped member at a lower end and a reinforcing bar at an upper end. A first manhole skeleton block which also serves as a swivel press shaft having a water stop can be held by a holding portion of the swivel press machine, and the press-in jack and the swirl jack are driven to swivel press the first manhole skeleton block. Then, excavation is performed by an excavator, and a second manhole skeleton block also serving as a turning press-fitting shaft having a connecting member provided with a reinforcing bar at least at a lower end portion is connected to the first manhole skeleton block, and the press-in jack and the turning jack are connected. The manhole body block is swiveled and press-fitted by driving, and a small-diameter pipe propulsion device is fixed inside the manhole body block. Propelled while connecting the small diameter tube by propulsion device, then manhole construction method, characterized in that they have installed manhole launched to the surface portion. 4. A reinforcing bar is fixed to an annular member made of steel, the reinforcing bar is buried at an upper end of an annular block, and a blade-shaped member is attached to a lower end of the block. A through hole is drilled, and a water stop which can connect a small-diameter pipe is fixed to the through hole, and further a manhole / swing press-fitting shaft, which is buried vertically inside the block , The reinforcing bar is a reinforcing bar, and the reinforcing bar is
A manhole skeleton block, wherein the length is longer than the vertical length of the annular member . 5. A first reinforcing member is fixed to a first annular member made of steel, the first reinforcing member is buried in an upper end of an annular block, and a second reinforcing member is fixed to a second annular member made of steel. Fix the reinforcement,
The second reinforcement is buried at the lower end of the block, and furthermore, a manhole combined swirl press-fitting shaft, wherein the reinforcement is buried vertically inside the block, and the reinforcement is
A reinforcing bar, and a length of the reinforcing bar in a vertical direction of the annular member.
Manhole skeleton block characterized by being longer than the length .