JP2001146747A - Earth-retaining method for deep, long ditch for embedding underground pipe or the like, and sheet pile wall retaining tower to be used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth-retaining method for embedding underground pipes or the like in a deep, long ditch with which noise and vibration from the work can be eliminated, the execution of the work can be carried out extremely safely and further the work can be completed in a short period of time and efficiently at a low cost, as well as sheet pile wall retaining towers used for the method. SOLUTION: Inside a deep, long ditch 1 for embedding pipes, sheet pile wall retaining towers 2A.2B... comprising inverted-U-shaped concrete block bodies as tower element bodies 10, which can be stacked and combined together, are erected and arranged to the form of bridge piers, sheet pile stiles 3 are set to the bridge piers in a multi- stage shape, and sheet pile wall retaining frame bodies 7 are erected and built, thereafter, the sheet piles 8 are inserted from the above to a space between the outer side of the sheet pile 3 and an earth wall 6 of the deep, long ditch and the sheet pile wall 9 is erected and set in this earth-retaining method in addition to the sheet pile wall retaining towers 2 made by the tower element bodies 10 collected and united as the features of this method and the towers in the configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing underground plumbing pipes from falling into the trenches of the earth wall when long pipes such as underground plumbing pipes and underground gas pipes are buried underground. The present invention relates to "a method of retaining a deep groove for burying underground pipes and a sheet pile holding tower used for the method."

[0002]

2. Description of the Related Art Conventionally, when the above-mentioned long pipes are buried underground, a solid sheet pile having excellent mechanical strength is driven into the ground in a required chain width interval, and then driven into the ground. Remove the earth and sand between the driven sheet piles to form a deep groove.After that, workers enter the deep groove and apply `` reinforcement work with stay material '' to the unstable sheet pile wall to withstand the soil retention load. The sheet pile wall which secures the obtained pressure-resistant strength is constructed, and measures are taken to retain the pile with the sheet pile wall.

[0003]

In the above-mentioned conventional method of retaining a deep trench for burying underground pipes, the above-mentioned method of retaining a deep trench, which may reach a depth of 4 meters or more, is formed by a sheet pile into which a retaining wall is inserted. Therefore, it is necessary to drive deep into the hard soil with a special machine (if the groove depth is 4 meters, drive it to about 5 meters or more). Vibration causes pollution and worsens the construction environment. In addition, it requires a lot of trouble and lengthens the construction period.

[0004] Since the sheet piles are forcibly driven by strong hitting, expensive piles having excellent mechanical strength are required, which increases the construction cost. In addition, after the underground pipes are buried, the sheet piles are extracted by a special machine. The complicated work of removing is indispensable, and furthermore, the reinforcement work of the sheet pile wall that enters the groove is performed in an unstable state of the sheet pile wall, so there is a danger that it will be potentially fatal to humans. There is a drawback in that the series of construction processes leading to removal is complicated and dangerous.

The present invention provides a "method of retaining a deep trench for burying underground pipes and a sheet pile holding tower used therefor" which solves the above-mentioned drawbacks of the prior art.

[0006]

SUMMARY OF THE INVENTION The present invention for solving the above-mentioned technical problem is disclosed in "In the case of embedding a deep trench for burying underground pipes with a sheet pile wall, the inside of the deep trench is dug and formed to have a wide groove width. In addition, a sheet pile wall holding tower having a buried work space is erected in the form of a pier, and a sheet pile crosspiece is bridged between the side walls of the sheet pile wall holding tower in a multi-step manner to construct a sheet pile wall holding frame. Afterwards, a group of sheet piles is inserted into a space between the outside of the sheet pile and the earth wall of the deep groove to set up a sheet pile wall along the sheet pile, thereby setting a depth for burying underground pipes. Long-groove soil retaining method "

[0007] An inverted U-shaped concrete block body in which leg plates are integrally provided on both sides of an upper surface portion, and an interconnecting portion in which an edge portion of the upper surface portion and a lower end of the leg plate mesh with each other is laminated. A sheet pile wall retainer for use in the earth retaining method according to the present invention, characterized by a structure comprising a set of tower bodies that are capable of being assembled and further provided with a sheet pile receiving portion that supports an end of the sheet pile outside the leg plate. Tower ".

That is, according to the earth retaining method of the present invention, the sheet pile wall holding skeleton is assembled and constructed in a deep groove previously dug and formed with a wide groove width, and the sheet pile group is moved upward to the outside of the sheet pile bar of the skeleton. It is characterized by a method of setting a sheet pile wall to prevent earth and sand intrusion due to the collapse of the soil wall in the deep trench where the underground pipes are buried by inserting them in parallel in a chain.

The sheet pile wall holding tower, which is a main part of the sheet pile wall holding frame, is a concrete block or a steel frame which can sufficiently withstand the earth retaining load. A form or a stand-alone form is used. The underground pipes in the present invention include those including water supply pipes and drain pipes buried underground and other long objects.

[0010]

According to the soil retaining method of the present invention having the above-described structure, the sheet pile wall is supported and held by the sheet pile wall holding frame constructed in the groove, so that the soil retaining function of preventing the collapsed soil of the groove soil wall from entering the groove can be sufficiently achieved. Can be secured. Then, it is not necessary to strongly press and insert the sheet pile deep into the ground, and the sheet pile is set by inserting the sheet pile into the space existing along the sheet pile bar of the sheet pile wall holding frame set in the deep groove formed in advance, and setting the sheet pile wall for retaining. Since it can be done, the soil retention measures by the sheet pile wall are silent and can be performed without vibration.

The sheet pile wall holding frame can be constructed by piercing a sheet pile cross into a sheet pile wall holding tower inserted and installed in a deep groove by a crane truck or the like. There is no necessity, and a series of construction processes from setting of the pile sheet wall for retaining to removal are safer and more efficient than the conventional method.

Further, a group of sheet piles constituting the sheet pile wall includes:
Since the underground press-fitting by the conventional banging becomes unnecessary, a lightweight and inexpensive material made of, for example, a "composite material reinforced with a long glass fiber mat" can be used. And the sheet pile wall holding tower having the above configuration used for the earth retaining method of the present invention,
Since it consists of a set of unit tower bodies that can be sequentially laminated and polymerized,
The sheet pile wall holding tower having the required height can be set arbitrarily by matching the standardized mass-produced one with the depth of the deep groove, and after use, the stacking-stacked one can be sequentially removed to allow easy and quick removal.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description will be given based on embodiments. First, an embodiment of a sheet pile holding tower (hereinafter simply referred to as a holding tower) used in the earth retaining method of the present invention is shown in FIG.
This will be described with reference to FIG. That is, the holding tower 2 is formed by stacking a multi-staged tower element body 10 of an inverted U-shaped concrete reinforced block in which plate-like legs 12 are integrally provided at both ends of a flat rectangular surface portion 11. To the required height, and place the side surface of the plate leg 12 on the earth wall 6 of the deep groove 1 in which the underground pipes (the sewer pipe 5 in this embodiment) are buried. And is a main member constituting the sheet pile wall holding frame 7 described later.

More specifically, the tower body 10 has a width B (approximately 1....) That matches the average groove width of the deep groove 1 for burying underground pipes.
4 meters), a unit height H (approximately 1.0 meters) and a length L (approximately 0.6 meters). It has a penetrating working space. A notch 13 at both corners of the surface portion 11 and a ridge 14 provided at an outer lower end of the plate-like leg 12 are provided.
Are mutually engaged so that the tower body 10 of the same size has an interconnecting portion that can be vertically connected in a stable posture against external force. Reference numeral 16 in the figure is a hanging hook.

The plate-like legs 12 of the tower body 10
At the outer periphery of the sheet pile 12, a sheet pile support 15 for carrying an end of a sheet pile 3 to be described later and combining and connecting the both ends to the both sides of the holding tower 2 is substantially at the middle of the height H of the plate-like leg 12, and both ends in the longitudinal direction. It is provided in the part. Then, a sheet pile wall 9 for preventing earth and sand from entering the groove by the collapse of the earth wall 6 of the deep groove 1 is constructed by the following construction method by using the holding tower 2 composed of the tower element body 10.

That is, with reference to FIG. 1 showing an embodiment of a sheet pile wall retaining method according to an embodiment of the present invention applied to the burial work of a sewer pipe 5, first, a deep groove 1 having a burial depth of the sewer pipe 5 will be described.
Are slightly dug and formed, and the tower element 10 of FIG. 2 is inserted into the groove of the deep groove 1 with an interval of a span S as an insertion set. Holding towers 2A and 2 in which 10 are stacked two by two
B ... is set up in the form of a pier in the trench.

Subsequently, a straight bar type sheet pile 3 made of I-shaped steel and channel steel is bridged between adjacent holding towers 2A, 2B,.
2B are interconnected to form a “sheet pile wall holding frame 7 composed of a combination of the holding towers 2A and 2B and the sheet pile 3” into the deep groove 1.
Set to build within.

Thereafter, the sheet piles 8 are sequentially inserted from above the deep groove 1 into the space between the outside of the sheet pile bar 3 of the sheet pile wall holding frame 7 and the earth wall 6 of the deep groove 1 so as to be connected in a row. The sheet pile wall 9 is set upright along the outside of the sheet pile 3.
Thus, the sheet pile wall 9 erected facing the inside of the earth wall 6 prevents earth and sand from entering the groove due to the collapse of the earth wall 6. The sheet pile 8 forming the sheet pile wall 9 is, for example, a lightweight simple sheet pile manufactured by Idemitsu NS Co., Ltd. (having a structure in which expanded metal is incorporated into a composite material in which a thermoplastic resin is reinforced with a long glass fiber mat). In order to stabilize the orientation of the sheet pile walls 9, the upper end is lightly tapped and a little of the lower end is inserted into the soil to set the sheet pile wall 9 that is supported along the sheet pile 3.

The earth retaining method of the above embodiment has the above-mentioned effect, and the sheet pile wall 9 can be set only by inserting a lightweight sheet pile from above the groove and tapping the head lightly without the need for press-fitting the sheet pile 8 into the hard soil. Therefore, the setting work can be performed very efficiently with no noise and strong hitting vibrations, a quiet state, and a good working environment. The sheet pile wall holding frame 7 for supporting and holding the sheet pile wall 9 is lifted by a crane truck or the like to form the holding tower 2 by lifting and stacking the tower body 10 in the deep groove 1. Can be constructed only by hooking and connecting the sheet pile 3 to the groove, so that it can be constructed more efficiently and in a shorter time and at lower cost than the conventional earth retaining method, and the deep groove is used for setting and reinforcing the sheet pile wall 9. Since there is no need for an operator to enter the area 1, the safety of the construction is particularly improved. And
Since the light and inexpensive sheet pile 8 can be used, removal of the sheet pile wall 9 after completion of the embedding work is simplified, and transport of the group of sheet piles 8 is particularly easy compared with the conventional sheet pile heavy sheet pile.

Next, another embodiment of the holding tower 2 of the present invention will be described with reference to FIG. That is, the thing of FIG. 3 is a single-shaped tower body framed and surrounded by four steel main pillars 20 in a rectangular shape, and has a high height H (approximately 4 ５5 meters). Then, any two of the multi-staged sheet pile receiving portions 15 provided on the main pillar 20 are selected, the sheet pile beam 3 is bridged, and the sheet pile wall 9 is set by the method of the embodiment of FIG. . The holding tower 2 shown in FIG. 3 has a main material 20 in order to make it possible to adjust and set the tower width B on site by matching the groove width of the deep groove 1.
In some cases, the tower width beam 21 connecting the two may be configured to be exchangeable.

In the earth retaining method of the present invention, when the standing stability of the holding tower 2 is lacked due to the soil at the bottom of the groove, the holding tower 2 may be interconnected and fixed by a connecting rod other than the sheet pile 3. The sheet pile 3 may be detachably connected to the sheet pile receiving portion 15 of the holding tower 2 by mechanical fixing means such as bolting. Furthermore, sheet pile wall holding tower 2
May be made of a resin material such as "earth pressure resistant structure in which a reinforced plastic frame is erected on a concrete block base".

[0022]

As described above, the earth retaining method for deep trenches for burying underground pipes according to the present invention can perform earth retaining work in a favorable working environment without generating pollution due to construction noise and vibration. In addition, the safety is extremely good, and in addition, there is an effect that the efficiency of the soil retaining method is shorter than that of the conventional soil retaining method, and that it is possible to take measures against the soil at a low cost, and the practicality is excellent. And the sheet pile wall holding tower of the present invention can support the smooth achievement of the various effects of the present invention.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a soil retaining method for a deep trench for burying underground pipes of the present invention, (A) is an explanatory view of the method, and (B) is a retaining wall setting state by the method (A). Cross section of groove

FIGS. 2A and 2B show a sheet pile holding tower used in the earth retaining method of the embodiment shown in FIG. 1, wherein FIG. 2A is a perspective view and FIG.

FIG. 3 shows another embodiment of a sheet pile wall holding tower used in the earth retaining method of the present invention, wherein (A) is a front view and (B) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deep groove for embedding 2 Sheet pile wall holding tower 3 Sheet pile bar 5 Sewer pipe 6 Soil wall 7 Sheet pile wall holding frame 8 Sheet pile 9 Sheet pile wall 10 Tower body 11 Surface part 12 Leg plate part 13 Concave strip 14 Convex strip 15 Part 20 Main pillar

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Sadatsugu Wakabayashi 2856, Takachaya Komori Ueno-cho, Tsu-shi, Mie F-term in Toho Bussan Co., Ltd. 2D044 AA12

Claims (2)

[Claims] When a deep trench for burying underground pipes is buried by a sheet pile wall, a sheet pile wall holding tower provided with a burying work space is pierced in the deep trench having a wide trench width. At the same time, a sheet pile is laid in a multi-stage manner between side walls of the sheet pile holding tower to form a sheet pile holding frame, and thereafter, the outside of the sheet pile and the earth wall of the deep groove are formed. A group of sheet piles is inserted into a space between the piles, and a sheet pile wall is erected along the sheet pile cross-section so as to bury a deep groove for burying underground pipes. 2. An inverted U-shaped concrete block in which leg plates are integrally provided on both sides of an upper surface portion, and an interconnecting portion in which an edge portion of the upper surface portion and a lower end of the leg plate mesh with each other. 2. A sheet pile wall for use in an earth retaining method according to claim 1, wherein said sheet pile wall is formed by assembling a tower element body capable of being stacked and assembled, and further comprising a sheet pile receiving portion for supporting an end of the sheet pile outside said leg plate. Holding tower.