JP6317943B2 - Pipe-in-pipe construction and in-pipe scaffolding - Google Patents
Pipe-in-pipe construction and in-pipe scaffolding Download PDFInfo
- Publication number
- JP6317943B2 JP6317943B2 JP2014025426A JP2014025426A JP6317943B2 JP 6317943 B2 JP6317943 B2 JP 6317943B2 JP 2014025426 A JP2014025426 A JP 2014025426A JP 2014025426 A JP2014025426 A JP 2014025426A JP 6317943 B2 JP6317943 B2 JP 6317943B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- scaffold
- new
- existing
- vertical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims description 43
- 239000000463 material Substances 0.000 claims description 114
- 238000000034 method Methods 0.000 claims description 49
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 125000002066 L-histidyl group Chemical group [H]N1C([H])=NC(C([H])([H])[C@](C(=O)[*])([H])N([H])[H])=C1[H] 0.000 description 6
- 239000002440 industrial waste Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002627 tracheal intubation Methods 0.000 description 1
Landscapes
- Sewage (AREA)
Description
本発明は、既設埋設管の内部に新設管を挿入して新たな管路を構築するパイプインパイプ工法およびこのパイプインパイプ工法を実施する際に用いる管内足場に関するものである。 The present invention relates to a pipe-in-pipe method for constructing a new pipe line by inserting a new pipe into an existing buried pipe, and an in-pipe scaffold used for carrying out this pipe-in-pipe method.
従来、上下水道管路や農業用水道管路等の既設管路が老朽化した場合、既設管路内に新設管を挿入配置して新たな管路を形成するパイプインパイプ工法が知られている（下記特許文献１参照）。 Conventionally, when existing pipes such as water and sewage pipes and agricultural water pipes have become obsolete, a pipe-in-pipe method has been known in which new pipes are inserted into existing pipes to form new pipes. (See Patent Document 1 below).
パイプインパイプ工法を行なう上で、既設管路中に鉛直方向に延びる既設縦管を有する場合には、一般に、図２１〜図２４に示す工法が採用されていた。
すなわち、既設縦管１００を含めるように立坑１０１を築造する。立坑１０１は既設縦管に１００の上端部１００ａにつながる上側の既設横管１０２の一部を含むように築造する（図２１参照）。
次いで、既設縦管１００及びこの既設縦管１００につながる既設横管１０２の一部をそれぞれ撤去する。これら管の撤去に伴い、上側の既設横管１０２並びに下側の既設横管１０３にそれぞれ管開口１０２ａ、１０３ａが形成される。その後、図示せぬ管材料投入箇所から新設管材料を投入し、下側の既設横管１０３内に新たな横管路１０５を構築する（図２２参照）。
In carrying out the pipe-in-pipe method, in the case where an existing vertical pipe extending in the vertical direction is included in the existing pipe line, the method shown in FIGS. 21 to 24 is generally employed.
That is, the shaft 101 is constructed so as to include the existing vertical pipe 100. The vertical shaft 101 is constructed so as to include a part of the upper existing horizontal pipe 102 connected to the upper end portion 100a of the existing vertical pipe (see FIG. 21).
Next, the existing vertical pipe 100 and a part of the existing horizontal pipe 102 connected to the existing vertical pipe 100 are removed. As these pipes are removed, pipe openings 102a and 103a are formed in the upper existing horizontal pipe 102 and the lower existing horizontal pipe 103, respectively. Thereafter, a new pipe material is introduced from a pipe material input portion (not shown), and a new horizontal pipe path 105 is constructed in the existing horizontal pipe 103 on the lower side (see FIG. 22).
一方、立坑１０１とは別の場所例えば工場等で、新設管材料１０４を鉛直方向につなげて立ち上がり管１０６を構築する。この立ち上がり管１０６を立坑１０１内に吊り込み、下側の新たな横管路１０５と接続する（図２３参照）。この接続が完了した時点で、立ち上がり管１０６の上端開口から、作業員が新設管内に入り、接続部の内面塗装を行なう。
その後、あるいは前述の立ち上がり管１０６の内面塗装作業に並行して、立坑１０１を立ち上がり管１０６の上端近傍まで埋め戻す（図２４参照）。
On the other hand, the rising pipe 106 is constructed by connecting the new pipe material 104 in the vertical direction at a place different from the vertical shaft 101, such as a factory. The rising pipe 106 is suspended in the shaft 101 and connected to a new lower horizontal pipe 105 (see FIG. 23). When this connection is completed, an operator enters the new pipe from the upper end opening of the riser pipe 106 and paints the inner surface of the connection portion.
Thereafter, or in parallel with the above-described inner surface painting operation of the riser pipe 106, the shaft 101 is backfilled to the vicinity of the upper end of the riser pipe 106 (see FIG. 24).
上側の既設横管１０２に形成された管開口１０２ａから、新設管材料１０４を投入し、既設横管１０２内に新たな横管路１０５を構築するとともに、この新たに構築した横管路１０５と前記立ち上がり管１０６の上端部とを、挿し管を用いて接続する。
その後、残りの立坑部分１０１ａの埋め戻しを行なう。
A new pipe material 104 is introduced from a pipe opening 102 a formed in the upper existing horizontal pipe 102, and a new horizontal pipe path 105 is constructed in the existing horizontal pipe 102, and the newly constructed horizontal pipe path 105 and The upper end of the rising pipe 106 is connected using an intubation pipe.
Thereafter, the remaining shaft portion 101a is backfilled.
上述したように従来のパイプインパイプ工法では、既設管路中に鉛直方向に延びる既設縦管１００を有する場合、既設縦管１００が存する箇所並びにその近傍に既設縦管１００全体を露出するための大型の立坑１０１を築造することが前提であり、例えば既設縦管１００の上方に構築物が存する場合等、立坑１０１を築造することができない状況下では、実施することができない問題があった。
また、従来のパイプインパイプ工法では、廃土や既設縦管材料等の多量の産業廃棄物が生じてしまい、これら産業廃棄物を処理しなければならず、不経済であった。
As described above, in the conventional pipe-in-pipe method, in the case where the existing vertical pipe 100 extending in the vertical direction is provided in the existing pipe line, the entire existing vertical pipe 100 is exposed at a location where the existing vertical pipe 100 exists and in the vicinity thereof. It is premised on the construction of a large shaft 101. For example, when there is a structure above the existing vertical pipe 100, there is a problem that the shaft 101 cannot be constructed.
Moreover, in the conventional pipe-in-pipe construction method, a large amount of industrial waste such as waste soil and existing vertical pipe material is generated, and these industrial wastes must be processed, which is uneconomical.
一方、特許文献２，３には、縦管につながる横管部分に縦管内に支持・吊り下げ用の装置を配置し、この装置に吊り支持される作業用足場に作業員が乗って縦管内のメンテナンスを行なう技術が提案されている。
このように縦管内で吊り支持される支持・吊り下げ用の装置を利用して、既設縦管内に新設縦管を構築することも考えられるが、支持・吊り下げ装置が既設管路内で大きなスペースを占めるため、既設管路内で新設管材料を運搬するに支障が出る。このため、前述した縦管内で吊り支持される、支持・吊り下げ用の装置を利用したパイプインパイプ工法は、実施することができなかった。
On the other hand, in Patent Documents 2 and 3, a device for supporting and suspending is arranged in a vertical tube portion in a horizontal tube portion connected to the vertical tube, and an operator rides on a work scaffold suspended and supported by this device. A technique for performing maintenance has been proposed.
It is conceivable to construct a new vertical pipe in an existing vertical pipe by using a support / hanging device suspended and supported in the vertical pipe as described above, but the support / hanging device is large in the existing pipe. Occupying space will hinder the transportation of new pipe materials in existing pipe lines. For this reason, the pipe-in-pipe method using the supporting / suspending device that is suspended and supported in the vertical pipe described above cannot be implemented.
本発明は、上述した事情に鑑みてなされたものであって、既設縦管全体を露出するための大型の立坑を築造する必要がなく、既設縦管の近傍に小型の立坑を築造するだけで足り、加えて、廃土、撤去管材料等の産業廃棄物の排出量を低減することができ、しかも、立坑築造位置にとらわれることなく既設縦管内に新設縦管を構築することが可能なパイプインパイプ工法およびこのパイプインパイプ工法を実施する際に用いる管内足場を提供することを課題とする。 The present invention has been made in view of the above-described circumstances, and it is not necessary to build a large shaft for exposing the entire existing vertical pipe, but only by building a small shaft near the existing vertical pipe. In addition, it is possible to reduce the amount of industrial waste, such as waste soil and removed pipe material, and to construct a new vertical pipe within an existing vertical pipe without being limited to the vertical shaft construction position It is an object of the present invention to provide an in-pipe method and an in-pipe scaffold used when the pipe-in-pipe method is carried out.
本発明は、上記課題を解決するために、以下の手段を採用する。
請求項１の発明に係るパイプインパイプ工法は、横方向に伸びて埋設された既設横管と該既設横管に接続されるとともに縦方向に伸びて埋設された既設縦管とを備える既設埋設管の内部に新設管材料を挿入して新たな管路を構築するパイプインパイプ工法であって、前記既設横管の一部を取り込むように立坑を築造する立坑築造工程と、前記既設横管の一部を切断して開口を形成する既設横管切断工程と、前記開口から新設管材料及び足場材料を挿入する新設管材料等挿入工程と、前記新設管材料等挿入工程で挿入された新設管材料を前記既設縦管の内部で底部から順に上方へ積み上げるとともに、積み上げた新設管材料の端部どうしを接合して新設縦管を構築する新設縦管構築工程と、前記新設管材料等挿入工程で挿入された新設管材料を前記既設横管の内部で順に横方向につなげて配置するとともに配置した新設管材料の端部どうしを接合して新設横管を構築するとともに、構築した前記新設横管と前記新設縦管構築工程で構築した前記新設縦管とを接続する新設横管構築工程とを備え、前記新設縦管構築工程において、前記足場材料により作られる管内足場を、前記新設管材料の内面に取り付けた突起に固定し、前記管内足場を利用して前記既設縦管内での前記新設管材料の積み上げ作業並びに前記新設管材料の端部どうしの接合作業を行なうことを特徴とする。
The present invention employs the following means in order to solve the above problems.
The pipe-in-pipe construction method according to the invention of claim 1 includes an existing horizontal pipe extending in the horizontal direction and an existing vertical pipe connected to the existing horizontal pipe and extending in the vertical direction and embedded in the vertical pipe. A pipe-in-pipe method for constructing a new pipe line by inserting a new pipe material into a pipe, and a vertical shaft construction process for constructing a vertical shaft so as to capture a part of the existing horizontal pipe, and the existing horizontal pipe An existing horizontal pipe cutting step that cuts a part of the tube to form an opening, a new pipe material insertion step that inserts a new pipe material and a scaffold material from the opening, and a new installation that is inserted in the new pipe material insertion step A new vertical pipe construction process for constructing a new vertical pipe by joining the ends of the new pipe material stacked in order from the bottom inside the existing vertical pipe, and inserting the new pipe material, etc. New pipe material inserted in the process The newly installed horizontal pipe and the newly installed vertical pipe are constructed by connecting the ends of the newly installed pipe materials in the horizontal direction in the existing horizontal pipe in order and constructing the newly installed horizontal pipe. And a new horizontal pipe construction process for connecting the new vertical pipe constructed in step 1. In the new vertical pipe construction process, a pipe scaffold made of the scaffold material is fixed to a protrusion attached to the inner surface of the new pipe material Then, using the in-pipe scaffolding, the new pipe material is stacked in the existing vertical pipe and the end parts of the new pipe material are joined to each other.
請求項１の発明に係るパイプインパイプ工法によれば、新設縦管構築工程において、新設管材料等挿入工程で挿入された新設管材料を既設縦管の底部から順に上方へ積み上げるとともに、積み上げた新設管材料の端部どうしを接合して新設縦管を構築するものである。このように、既設縦管を利用して、その内部で新設縦管を構築するから、既設縦管全体を露出するための大型の立坑を築造することなく、新設縦管を構築することができる。
また、この新設縦管構築工程において、足場材料により作られる管内足場を、新設管材料の内面に取り付けた突起に固定し、既設縦管内での新設管材料の積み上げ作業並びに新設管材料の端部どうしの接合作業を行なうものであるから、管内足場が新設縦管の外周より外方へ出っ張ることがなく、しかも、積み上げてセットされた新設管材料に管内足場が固定されるので、この管内足場と、積み上げてセットされた新設管材料の上に新たに積み上げられる新設管材料とが干渉するおそれがなく、このため、積み上げてセットされた新設管材料の上に新たに積み上げられる新設管材料の運搬に何ら支障が出ない。
According to the pipe-in-pipe construction method according to the invention of claim 1, in the new vertical pipe construction process, the new pipe material inserted in the new pipe material insertion process is piled up in order from the bottom of the existing vertical pipe. A new vertical pipe is constructed by joining the ends of the new pipe material. Thus, since the existing vertical pipe is constructed using the existing vertical pipe, the new vertical pipe can be constructed without building a large shaft for exposing the entire existing vertical pipe. .
In addition, in this new vertical pipe construction process, the pipe scaffold made of the scaffold material is fixed to the protrusions attached to the inner surface of the new pipe material, the stacking work of the new pipe material in the existing vertical pipe and the end of the new pipe material Since the pipe scaffolds do not protrude outward from the outer periphery of the newly installed vertical pipe, and the pipe scaffolds are fixed to the new pipe material that is stacked and set, the pipe scaffolds are fixed together. Therefore, there is no risk of interference with the new pipe material that is newly stacked on the new pipe material that has been stacked and set. Therefore, the new pipe material that is newly stacked on the new pipe material that has been stacked and set is not There is no obstacle to transportation.
請求項２の発明に係るパイプインパイプ工法は、前記新設管材料の内面に取り付けた突起は、当該新設管材料を前記既設縦管内に挿入するとき、当該新設管材料を吊り下げるための長尺部材を係止する係止部であることを特徴とする。
これにより、新設管材料を吊り下げるための長尺部材を係止する係止部と管内足場を固定するための突起とを兼用することができ、新設管材料の内部構造の簡素化が図れ、かつ設置後それら突起あるいは係止部の撤去作業が容易になる。
In the pipe-in-pipe construction method according to the invention of claim 2, the protrusion attached to the inner surface of the new pipe material is a long length for hanging the new pipe material when the new pipe material is inserted into the existing vertical pipe. It is a locking part which locks a member, It is characterized by the above-mentioned.
Thereby, it is possible to use both the locking portion for locking the long member for suspending the new pipe material and the projection for fixing the pipe scaffold, simplifying the internal structure of the new pipe material, And the removal operation | work of these protrusions or a latching | locking part becomes easy after installation.
請求項３の発明に係る管内足場は、新設管材料の内面に設けられた突起に固定される管内足場であって、前記突起に固定されて中央部分に開口が形成された足場フレームと、前記足場フレーム上に配置されて折り畳み可能とされ、折り畳まれた際に開放される前記開口を通して人を上下方向に通過させることが可能な足場本体と、を備え、前記足場本体は、相互の間に間隔をあけて左右両側にそれぞれ配置される側方固定足場部材と、前記側方固定足場部材の間に配置されて折り畳み可能な中央可動足場部材とを備えることを特徴とする。
これにより、足場本体を折り畳むことで、人（作業員）が当該管内足場を上下方向に移動することが可能となり、また、足場本体を広げてフラットにすることで、広い足場を確保することができ、作業性の向上が図れる。
また、作業員が側方固定足場部材に足を乗せた状態で、中央可動足場部材の折り畳み作業や逆に折り畳まれた中央可動足場部材を広げてフラットにする作業を行なうことができる。また、中央可動足場部材を折り畳んで、作業員が当該管内足場を上下方向に移動する際に、作業員が側方固定足場部材に足を乗せることができる。
An in-pipe scaffold according to the invention of claim 3 is an in-pipe scaffold fixed to a protrusion provided on the inner surface of a new pipe material, the scaffold frame being fixed to the protrusion and having an opening formed in a central portion thereof, A scaffold body disposed on the scaffold frame and configured to be foldable and capable of allowing a person to pass vertically through the opening that is opened when folded , wherein the scaffold body is between and side fixing scaffold members disposed respectively on the left and right sides at an interval, and wherein the Rukoto a central movable scaffold member foldable disposed between said lateral fixing scaffold member.
Thereby, by folding the scaffold main body, it becomes possible for a person (worker) to move the pipe scaffold in the vertical direction, and by widening the scaffold main body and flattening, a wide scaffold can be secured. And workability can be improved.
In addition, in a state where the worker puts his / her foot on the side fixed scaffold member, the center movable scaffold member can be folded or the center movable scaffold member folded in reverse can be expanded and flattened. Further, when the center movable scaffold member is folded and the worker moves the intra-pipe scaffold in the vertical direction, the worker can put his / her foot on the side fixed scaffold member.
請求項４に係る管内足場は、前記側方固定足場部材および前記中央可動足場部材が、網目状部材を備えることを特徴とする。
これにより、当該管内足場の通気性を確保することができ、作業中に新設縦管内で空気が淀むのを防止できる。
The intra-tube scaffold according to claim 4 is characterized in that the side fixed scaffold member and the central movable scaffold member include a mesh member.
Thereby, the air permeability of the said pipe | tube scaffold can be ensured, and it can prevent that air stagnates in a newly installed vertical pipe | tube during an operation | work.
請求項５に係る管内足場は、前記中央可動足場部材が折り畳まれて起立状態とされた際に、該起立状態の上端部が前記新設管材料の内面に当接するのを規制する角度規制ストッパが設けられていることを特徴とする。
これにより、起立状態の中央可動足場部材が不用意に倒れて、新設縦管の内面に突き当たり同内面が損傷される事態を未然に防止できる。
In the pipe scaffold according to claim 5, when the central movable scaffold member is folded to be in an upright state, an angle restriction stopper for restricting the upper end portion of the upright state from coming into contact with the inner surface of the new pipe material is provided. It is provided.
Accordingly, it is possible to prevent a situation in which the central movable scaffold member standing up inadvertently falls down and hits the inner surface of the newly installed vertical pipe and damages the inner surface.
請求項６に係る管内足場は、前記足場フレームが、多分割構造であることを特徴とする。 これにより、足場フレームを構成する個々の構成部材の軽量化並びに小型化を図ることができ、既設管路内でそれら足場フレームの構成部材を運搬する際、あるいはそれら構成部材を新設縦管に固定する際に有利になる。 An intraductal scaffold according to a sixth aspect is characterized in that the scaffold frame has a multi-partition structure. As a result, it is possible to reduce the weight and size of the individual structural members constituting the scaffold frame, and when transporting the structural members of the scaffold frame in the existing pipeline, or fix these structural members to the newly installed vertical pipe. It becomes advantageous when doing.
請求項１の発明によれば、既設縦管全体を露出するための大型の立坑を築造する必要がなく、既設縦管の近傍に小型の立坑を築造すれば足り、廃土、撤去管材料等の産業廃棄物の排出量を低減することができる。また、立坑築造位置にとらわれることなく既設縦管内に新設縦管を構築することが可能になる。 According to the invention of claim 1, it is not necessary to build a large shaft for exposing the entire existing vertical pipe, it is sufficient to build a small shaft near the existing vertical pipe, waste soil, removed pipe material, etc. The amount of industrial waste discharged can be reduced. Moreover, it becomes possible to construct a new vertical pipe within an existing vertical pipe without being restricted by the vertical shaft construction position.
請求項２の発明によれば、新設管材料を吊り下げるための長尺部材を係止する係止部と足場を固定するための突起とを兼用することができ、新設管材料の構成の簡素化が図れ、かつ設置後のそれら突起あるいは係止部の撤去作業が容易になる。 According to the invention of claim 2, it is possible to use both the locking portion for locking the long member for suspending the new pipe material and the projection for fixing the scaffold, and the configuration of the new pipe material is simple. And the removal of these protrusions or locking portions after installation is facilitated.
請求項３の発明によれば、足場本体を折り畳むことで、作業員が当該管内足場を上下方向に移動することが可能となる。また、足場本体を広げてフラットにすることで、広い足場を確保することができ、作業性の向上が図れる。 According to the invention of claim 3, the operator can move the scaffold in the pipe in the vertical direction by folding the scaffold main body. Further, by widening the scaffold main body and making it flat, a wide scaffold can be secured and workability can be improved.
請求項４の発明によれば、作業員が側方固定足場部材に足を乗せた状態で、中央可動足場部材の折り畳み作業や逆に折り畳んである中央可動足場部材を広げてフラットにする作業を行なうことができ、また、中央可動足場部材を折り畳んで、作業員が当該管内足場を上下方向に移動する際に、作業員が側方固定足場部材に足を乗せることができる。つまり、中央可動足場部材を折り畳んだ際にも足場を確保することができる。 According to the invention of claim 4, in a state in which the worker puts his / her foot on the side fixed scaffold member, the central movable scaffold member is folded or the central movable scaffold member is folded and flattened. In addition, the center movable scaffold member can be folded and the worker can put his / her foot on the side fixed scaffold member when the worker moves the scaffold in the pipe in the vertical direction. That is, the scaffold can be secured even when the central movable scaffold member is folded.
請求項５の発明によれば、当該管内足場の通気性を確保することができ、作業中に新設縦管内で空気が淀むのを防止できる。 According to the invention of claim 5, the air permeability of the in-pipe scaffold can be ensured, and air can be prevented from being trapped in the newly installed vertical pipe during the work.
請求項６の発明によれば、起立状態の中央可動足場部材が不用意に倒れて、新設縦管の内面に突き当たり同内面が損傷されるのを未然に防止できる。特に、新設管材料の内面に例えば耐食性塗装等が施されている場合に有用である。 According to the invention of claim 6, it is possible to prevent the standing central movable scaffold member from inadvertently falling down and hitting the inner surface of the new vertical pipe and damaging the inner surface. This is particularly useful when the inner surface of the new pipe material is provided with, for example, a corrosion-resistant coating.
請求項７の発明によれば、足場フレームを構成する個々の構成部材の軽量化並びに小型化を図ることができ、既設管路内でそれら足場フレームの構成部材を運搬する際、あるいはそれら構成部材を新設縦管に固定する際に有利になる。 According to the seventh aspect of the present invention, the individual components constituting the scaffold frame can be reduced in weight and size, and when the components of the scaffold frame are transported in the existing pipe line, or these components. This is advantageous when fixing to a newly installed vertical pipe.
以下、本発明の実施形態を図面を参照して説明する。
図１〜図４は本発明の実施形態のパイプインパイプ工法の工程説明用の断面図である。
本発明の実施形態のパイプインパイプ工法は、横方向に伸びて埋設された上下の既設横管１、２とそれら上下の既設横管１、２に接続されるとともに縦方向に伸びて埋設された既設縦管３とを備える既設埋設管４の内部に新設管材料５を挿入して新たな管路６を構築するものである。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1-4 is sectional drawing for process description of the pipe in pipe construction method of embodiment of this invention.
The pipe-in-pipe method according to the embodiment of the present invention is connected to the upper and lower existing horizontal pipes 1 and 2 and the upper and lower existing horizontal pipes 1 and 2 that are embedded in the horizontal direction and are extended and embedded in the vertical direction. The new pipe material 5 is constructed by inserting the new pipe material 5 into the existing buried pipe 4 provided with the existing vertical pipe 3.
この実施形態のパイプインパイプ工法では、最初に、図１に示すように、上側の既設横管１の一部を取り込むように立坑１０を築造する（立坑築造工程）。立坑１０の直径は、新たな管路６を構築するための新設管材料５を吊り込んで挿入可能な大きさとする。
次いで、図２に示すように、上側の既設横管１の一部を切断し新設管材料等を挿入する開口１ａを形成する（既設横管切断工程）。
この既設横管切断工程の前後またはこの工程と並行して、図示せぬ管材料投入箇所から横管用の新設管材料５Ａを投入し、下側の既設横管２内に下側の新設横管１１を構築する。
In the pipe-in-pipe method of this embodiment, first, as shown in FIG. 1, the shaft 10 is constructed so as to take in a part of the upper existing horizontal pipe 1 (a shaft building process). The diameter of the shaft 10 is set to a size that allows the new pipe material 5 for constructing a new pipe line 6 to be suspended and inserted.
Next, as shown in FIG. 2, an opening 1 a for cutting a part of the upper existing horizontal pipe 1 and inserting a new pipe material or the like is formed (existing horizontal pipe cutting step).
Before or after the existing horizontal pipe cutting step, or in parallel with this step, a new pipe material 5A for the horizontal pipe is introduced from a pipe material input portion (not shown), and the lower new horizontal pipe is inserted into the lower existing horizontal pipe 2. 11 is built.
次いで、上側の既設横管１に形成された開口１ａから縦管用の新設管材料５Ｂ及び足場材料を挿入する（新設管材料等挿入工程）。縦管用の新設管材料５Ｂ及び足場材料については、後ほど詳しく説明する。
このとき、図５に示すように、新設管材料等挿入工程で挿入された縦管用の新設管材料５Ｂの内面に設けた係止部２０に吊り上げ用の長尺部材２１の先端を係止させて、既設縦管３の内部において縦管用の新設管材料５Ａを吊り下げて支持し、この支持した新設管材料５Ａを既設縦管３の底部から順に上方へ積み上げる。そして、積み上げた新設管材料５Ｂの端部どうしを、例えば溶接により接合して新設縦管１２を構築する（新設縦管構築工程）。
Next, the new pipe material 5B and the scaffold material for the vertical pipe are inserted from the opening 1a formed in the upper existing horizontal pipe 1 (new pipe material etc. insertion step). The new pipe material 5B and the scaffold material for the vertical pipe will be described in detail later.
At this time, as shown in FIG. 5, the tip of the elongate long member 21 is locked to the locking portion 20 provided on the inner surface of the new pipe material 5B for the vertical pipe inserted in the insertion process of the new pipe material and the like. Then, the new pipe material 5A for the vertical pipe is suspended and supported inside the existing vertical pipe 3, and the supported new pipe material 5A is stacked in order from the bottom of the existing vertical pipe 3. Then, the end portions of the stacked new pipe material 5B are joined together by welding, for example, to construct a new vertical pipe 12 (new vertical pipe construction process).
前記新設縦管構築工程の前後またはこの工程と並行して、上側の既設横管１に形成された開口１ａから横管用の新設管材料５Ａを既設横管１の内部に挿入する。挿入した新設管材料５Ｂを順に横方向につなげて配置するとともに、配置した新設管材料５Ｂの端部どうしを接合して上側の新設横管１３を構築する。そして、この構築した上側の新設横管１３と前記新設縦管構築工程で構築した前記新設縦管１２の上端部とを接続する（新設横管構築工程）。
その後、立坑１０の埋め戻しを行なう。
Before or after the new vertical pipe construction process or in parallel with this process, a new pipe material 5A for the horizontal pipe is inserted into the existing horizontal pipe 1 from the opening 1a formed in the existing horizontal pipe 1 on the upper side. The inserted new pipe material 5B is sequentially connected in the horizontal direction and arranged, and ends of the arranged new pipe material 5B are joined together to construct the upper new horizontal pipe 13. Then, the constructed upper horizontal pipe 13 is connected to the upper end of the new vertical pipe 12 constructed in the new vertical pipe construction process (new horizontal pipe construction process).
Thereafter, the shaft 10 is backfilled.
ここで、図６、図７に示すように、前記新設縦管構築工程においては、上側の既設横管１の開口１ａから挿入された足場材料により作られる管内足場３０を、新設管材料５Ｂの内面に設けた係止部２０に着脱可能に固定し、既設縦管３内での新設管材料５Ｂの積み上げ作業並びに新設管材料５Ｂの端部どうしの接合作業を行なう。
図６、図７に示すように、新設管材料５Ｂの内面には、必要に応じてタラップ２２を取り付けても良い。
なお、新設縦管１２の構築が完了した時点において、管内足場３０を撤去し、同時に係止部２０も取り外す。このとき、タラップ２２は、メンテナンス用としてそのまま残す。
Here, as shown in FIGS. 6 and 7, in the new vertical pipe construction step, the pipe scaffold 30 made of the scaffold material inserted from the opening 1a of the existing horizontal pipe 1 on the upper side is made of the new pipe material 5B. It fixes to the latching | locking part 20 provided in the inner surface so that attachment or detachment is possible, The stacking operation | work of the new pipe material 5B in the existing vertical pipe 3 and the joining operation | work of the edge parts of the new pipe material 5B are performed.
As shown in FIGS. 6 and 7, a trap 22 may be attached to the inner surface of the new pipe material 5 </ b> B as necessary.
When the construction of the new vertical pipe 12 is completed, the in-tube scaffold 30 is removed, and at the same time, the locking portion 20 is removed. At this time, the trap 22 is left as it is for maintenance.
次に、管内足場３０を図８〜図１７を参照して説明する。図８は本発明の実施形態の管内足場を新設縦管に固定した状態を示す閉塞時の正面図、図９は本発明の実施形態の管内足場を新設縦管に固定した状態を示す閉塞時の平面図、図１０は本発明の実施形態の管内足場を新設縦管に固定した状態を示す閉塞時の底面図、図１１は本発明の実施形態の管内足場を新設縦管に固定した状態を示す閉塞時の右側面図である。なお、管内足場の左側面図は右側面図とほぼ同様であるので、ここでは省略する。図１２は本発明の実施形態の管内足場を新設縦管に固定した状態を示す閉塞時の背面図である。
また、図１３は本発明の実施形態の管内足場を新設縦管に固定した状態を示す開放時（足場本体を折り畳んだ状態）の平面図、図１４は本発明の実施形態の管内足場を新設縦管に固定した状態を示す開放時の正面図、図１５は本発明の実施形態の管内足場を新設縦管に固定した状態を示す開放時の底面図、図１６は本発明の実施形態の管内足場を新設縦管に固定した状態を示す開放時の右側面図である。
Next, the intravascular scaffold 30 will be described with reference to FIGS. FIG. 8 is a front view showing a state in which the in-tube scaffold according to the embodiment of the present invention is fixed to the newly installed vertical pipe, and FIG. 9 is a closed view illustrating a state in which the in-tube scaffold according to the embodiment of the present invention is fixed to the newly installed vertical pipe. FIG. 10 is a bottom view showing a state in which the in-tube scaffold of the embodiment of the present invention is fixed to the newly installed vertical pipe, and FIG. 11 is a state in which the in-tube scaffold of the embodiment of the present invention is fixed to the newly installed vertical pipe. It is a right view at the time of obstruction | occlusion which shows. Note that the left side view of the pipe scaffold is substantially the same as the right side view, and is omitted here. FIG. 12 is a back view at the time of occlusion showing a state in which the in-tube scaffold of the embodiment of the present invention is fixed to the newly installed vertical pipe.
FIG. 13 is a plan view showing the state in which the in-tube scaffold of the embodiment of the present invention is fixed to the newly installed vertical pipe when opened (the scaffold body is folded), and FIG. 14 is the newly installed in-tube scaffold of the embodiment of the present invention. FIG. 15 is a bottom view showing the state in which the scaffold in the pipe according to the embodiment of the present invention is fixed to the newly installed vertical pipe, and FIG. 16 is a bottom view in the embodiment showing the state of being fixed to the vertical pipe. It is a right view at the time of opening which shows the state where the pipe scaffold was fixed to the newly installed vertical pipe.
管内足場３０は、縦管用の新設管材料５Ｂの内面に設けられた係止部２０に、ボルト３０ａ等の固定手段によって着脱自在に固定される（図２０参照）。
管内足場３０は、係止部２０に固定されて中央部分に開口３１Ａが形成された足場フレーム３１と、足場フレーム３１上に配置されて折り畳み可能とされ、折り畳まれた際に開放される開口３１Ａを通して人を上下方向に通過させることが可能な足場本体３２とを備える（図１０、図１５参照）。
The in-pipe scaffold 30 is detachably fixed to a locking portion 20 provided on the inner surface of a new pipe material 5B for a vertical pipe by a fixing means such as a bolt 30a (see FIG. 20).
The in-tube scaffold 30 is fixed to the locking portion 20 and has a scaffold frame 31 having an opening 31A formed at the center thereof. The scaffold 31 is arranged on the scaffold frame 31 so that it can be folded and opened when folded. And a scaffold main body 32 through which a person can pass in the vertical direction (see FIGS. 10 and 15).
図１０に示すように、足場フレーム３１は、直線状の基部３３Ａと、この基部３３Ａの両端からそれぞれ４５度の開き角度を持って外方へ傾斜して延びるとともに、基部３３Ａの半分の長さに設定された傾斜部３３Ｂとからなる構成材３３を４個、傾斜部３３Ｂの端部同士を同軸状となるように接続して、全体として８角形をなすように構成したものである。つまり、足場フレーム３１は４分割構造になっており、中央には開口３１Ａが形成されている。 As shown in FIG. 10, the scaffold frame 31 extends linearly from the base 33A and both sides of the base 33A so as to incline outward with an opening angle of 45 degrees, and is half the length of the base 33A. In this configuration, four constituent members 33 each including the inclined portion 33B set to be connected to each other and end portions of the inclined portion 33B are connected so as to be coaxial with each other so as to form an octagon as a whole. That is, the scaffold frame 31 has a four-part structure, and an opening 31A is formed at the center.
構成材３３としては、この実施形態の場合、山形鋼を用いているが、これに限られることなく、他の形鋼、例えばＩ型鋼、あるいは溝形鋼を用いても、あるいは断面円状の棒部材を用いてもよい。また、この実施形態では、傾斜部３３Ｂ（連結部）の先端にボルト接続用の平板３３Ｃが取り付けられている。
なお、必要に応じて、図１０に示すように、隣接する構成材３３同士を補強部材３４によって接合補強しても良い。
In the case of this embodiment, angle steel is used as the component material 33. However, the shape material 33 is not limited to this, and other shape steels, for example, I-shaped steel, groove-shaped steel, or a circular cross section may be used. A bar member may be used. Moreover, in this embodiment, the flat plate 33C for bolt connection is attached to the front-end | tip of the inclination part 33B (connection part).
In addition, as shown in FIG. 10, you may join and reinforce the adjacent structural members 33 with the reinforcing member 34 as needed.
足場本体３２は、相互の間に間隔をあけて左右両側にそれぞれ配置される側方固定足場部材３５と、側方固定足場部材３５の間に配置されて折り畳み可能な中央可動足場部材３６とを備え、図９、図１０に示すように、中央可動足場部材３６がストレートに広げられたとき、全体として円状をなして、新設縦管１２の内周に対応するように形成されている（閉塞状態）。
側方固定足場部材３５と中央可動足場部材３６は、それぞれ番線等の適宜固定手段によって足場フレーム３１に固定される。
The scaffold main body 32 includes a lateral fixed scaffold member 35 disposed on both the left and right sides with a space between each other, and a central movable scaffold member 36 disposed between the lateral fixed scaffold members 35 and foldable. As shown in FIGS. 9 and 10, when the central movable scaffold member 36 is spread straight, it is formed in a circular shape as a whole so as to correspond to the inner periphery of the newly installed vertical pipe 12 ( Occlusion).
The side fixed scaffold member 35 and the central movable scaffold member 36 are fixed to the scaffold frame 31 by appropriate fixing means such as a number line.
図１７は本発明の実施形態の管内足場の側方固定足場部材を示す平面図、図１８は本発明の実施形態の管内足場の中央可動足場本体を示す平面図、図１９は本発明の実施形態の管内足場の中央可動足場部材を示す側面図、図２０は本発明の実施形態の管内足場を新設縦管に固定する部分の拡大平面図である。
図１７に示すように、左右の側方固定足場部材３５は、それぞれ平面視において略三日月状に形成されたものである。なお、図１７では片方の側方固定足場部材３５しか示していないが、他方の側方固定足場部材３５も同様な構成である。
FIG. 17 is a plan view showing a laterally fixed scaffold member of the in-tube scaffold according to the embodiment of the present invention, FIG. 18 is a plan view showing a central movable scaffold body of the in-tube scaffold of the embodiment of the present invention, and FIG. 19 is an embodiment of the present invention. FIG. 20 is an enlarged plan view of a portion for fixing the in-pipe scaffold of the embodiment of the present invention to a newly installed vertical pipe.
As shown in FIG. 17, the left and right side fixed scaffold members 35 are each formed in a substantially crescent shape in plan view. In FIG. 17, only one side fixed scaffold member 35 is shown, but the other side fixed scaffold member 35 has the same configuration.
図１８に示すように、中央可動足場部材３６は、ストレートに広げられたとき、左右両側が円弧状となるよう外方に張り出してなる略長方形のものである。中央可動足場部材３６は、中央の平面視が長方形状とされた長方形部材３６Ａ、３６Ａと、図１８においてそれらの左右側方に設けられた、略三日月状の部材３６Ｂ、３６Ｂとからなり、それら部材が互いに蝶番３６Ｃで接続されて折り畳み可能になっている。なお、図１５、図１６には、中央可動足場部材３６が折り畳まれた状態（開放状態）を示す。
中央可動足場部材３６を構成する長方形部材３６Ａ、３６Ａおよび三日月状の部材３６Ｂ、３６Ｂ並びに側方固定足場部材３５は、外周のフレームに網目状部材３７が溶接等の固定手段によって取り付けられた構造になっている。
As shown in FIG. 18, the central movable scaffold member 36 is a substantially rectangular member that projects outwardly so that the left and right sides are arcuate when spread straight. The central movable scaffold member 36 includes rectangular members 36A and 36A whose central plan view is rectangular, and substantially crescent-shaped members 36B and 36B provided on the left and right sides thereof in FIG. The members are connected to each other by a hinge 36C and can be folded. 15 and 16 show a state where the central movable scaffold member 36 is folded (open state).
The rectangular members 36A and 36A, the crescent-shaped members 36B and 36B, and the side fixed scaffold member 35 constituting the central movable scaffold member 36 have a structure in which a mesh member 37 is attached to an outer peripheral frame by fixing means such as welding. It has become.
中央可動足場部材３６を構成する長方形部材３６Ａの一方には、図１５、図１６に示すように、当該中央可動足場部材３６が折り畳まれて起立状態とされた際に、該起立状態の傾斜角度を維持するストッパ３８が設けられている。これにより、折り畳まれて起立状態にある中央可動足場部材３６が不用意に倒れて、その上端部が新設管材料５Ｂの内面に当接するのを予め防止している。 As shown in FIGS. 15 and 16, one of the rectangular members 36 </ b> A constituting the central movable scaffold member 36 has an inclination angle of the standing state when the central movable scaffold member 36 is folded and brought up. A stopper 38 for maintaining the above is provided. As a result, the central movable scaffold member 36 that is folded and standing is inadvertently collapsed, and the upper end of the central movable scaffold member 36 is prevented in advance from coming into contact with the inner surface of the new pipe material 5B.
管内足場３０の使用方法について説明すると、図７の下側に示すように、中央可動足場部材３６を広げてフラットにすることで、広い足場を確保することができ、例えば作業員Ｓは、広げられた中央可動足場部材３６並びにこれと面一になる側方固定足場部材３５上を足場して自由に利用することができる。 The method of using the in-tube scaffold 30 will be described. As shown in the lower side of FIG. 7, a wide scaffold can be secured by expanding and flattening the central movable scaffold member 36. The center movable scaffold member 36 and the side fixed scaffold member 35 that is flush with the central movable scaffold member 36 can be used as scaffolds.
一方、中央可動足場部材３６を折り畳むことで、作業員Ｓは、足場フレーム３１に形成された開口３１Ａを通して上下方向へ自由に通過することができる。なお、中央可動足場部材３６が折り畳まれたときにも、側方固定足場部材３５は、足場フレーム３１上に載置された状態を維持されており、作業員Ｓは、この側方固定足場部材３５を足場として利用することができる。 On the other hand, by folding the central movable scaffold member 36, the worker S can freely pass in the vertical direction through the opening 31A formed in the scaffold frame 31. Even when the central movable scaffold member 36 is folded, the side fixed scaffold member 35 is maintained in a state of being placed on the scaffold frame 31, and the worker S can use this side fixed scaffold member. 35 can be used as a scaffold.
以上説明したように本発明に係るパイプインパイプ工法によれば、新設縦管構築工程において、新設管材料等挿入工程で挿入された新設管材料５Ｂを既設縦管３の底部から順に上方へ積み上げるとともに、積み上げた新設管材料５Ｂの端部どうしを接合して新設縦管を構築する。このように既設縦管３を利用して、その内部で新設縦管１２を構築するから、既設縦管３全体を露出するための大型の立坑を築造することなく、新設縦管を構築することができる。 As described above, according to the pipe-in-pipe construction method according to the present invention, in the new vertical pipe construction process, the new pipe material 5B inserted in the new pipe material insertion process is sequentially stacked upward from the bottom of the existing vertical pipe 3. At the same time, the end portions of the stacked new pipe material 5B are joined together to construct a new vertical pipe. Since the existing vertical pipe 12 is constructed using the existing vertical pipe 3 in this way, a new vertical pipe can be constructed without building a large shaft for exposing the entire existing vertical pipe 3. Can do.
既設縦管３全体を露出するための大型の立坑を築造することなく、既設縦管３の近傍に小型の立坑１０を築造すれば足り、加えて、既設縦管３は新設縦管１２の外側に配置したままであるので、廃土並びに撤去管材料等の産業廃棄物の排出量を大幅に低減することができる。
また、立坑築造位置にとらわれることなく既設縦管３内に新設縦管１２を構築することが可能であるので、既設縦管３の上方に構築物が存する場合等、既設縦管を含む立坑を築造することができない場合であっても、新設縦管１２を構築することができる。
It is only necessary to build a small shaft 10 in the vicinity of the existing vertical tube 3 without building a large shaft for exposing the entire existing vertical tube 3. In addition, the existing vertical tube 3 is located outside the new vertical tube 12. Therefore, the amount of industrial waste such as waste soil and removed pipe material can be greatly reduced.
In addition, since it is possible to construct the new vertical pipe 12 in the existing vertical pipe 3 without being limited to the vertical shaft construction position, when a structure exists above the existing vertical pipe 3, a vertical shaft including the existing vertical pipe is constructed. Even if this is not possible, the new vertical pipe 12 can be constructed.
また、この新設縦管構築工程において、足場材料により作られる管内足場３０を、新設管材料５Ｂの内面に取り付けた係止部２０に固定し、既設縦管３内での新設管材料５Ｂの積み上げ作業並びに新設管材料５Ｂの端部どうしの接合作業を行なうから、管内足場３０が新設縦管１２の外周より外方へ出っ張ることがなく、しかも、積み上げてセットされた新設管材料５Ｂに管内足場３０が固定されるので、この管内足場３０と、積み上げてセットされた新設管材料５Ｂの上に新たに積み上げられる新設管材料５Ｂとが干渉するおそれがない。このため、積み上げてセットされた新設管材料５Ｂの上に新たに積み上げられる新設管材料５Ｂの運搬に何ら支障が出ない。 In this new vertical pipe construction process, the pipe scaffold 30 made of the scaffold material is fixed to the locking portion 20 attached to the inner surface of the new pipe material 5B, and the new pipe material 5B is stacked in the existing vertical pipe 3. Since the work and the joining work of the ends of the new pipe material 5B are performed, the pipe scaffold 30 does not protrude outward from the outer periphery of the new vertical pipe 12, and the pipe scaffold is placed on the new pipe material 5B that is stacked and set. Since 30 is fixed, there is no possibility of interference between the in-pipe scaffold 30 and the newly installed pipe material 5B newly stacked on the newly set pipe material 5B. For this reason, there is no problem in the transportation of the new pipe material 5B newly stacked on the new pipe material 5B set by stacking.
また、本実施形態では、縦管用の新設管材料５Ｂの内面に取り付けた突起は、当該新設管材料５Ｂを既設縦管３内に挿入するとき、当該新設管材料５Ｂを吊り下げるための長尺部材２１を係止する係止部２０であり、このように新設管材料５Ｂを吊り下げるための長尺部材２１を係止する係止部２０と管内足場３０を固定するための突起とを兼用することができる。このため、縦管用の新設管材料５Ｂの内部構造の簡素化が図れ、かつ新設縦管１２構築後のそれら突起あるいは係止部２０の撤去作業が容易になる。 Moreover, in this embodiment, the protrusion attached to the inner surface of the new pipe material 5B for the vertical pipe is a long length for hanging the new pipe material 5B when the new pipe material 5B is inserted into the existing vertical pipe 3. It is the latching | locking part 20 which latches the member 21, and combines the latching | locking part 20 which latches the elongate member 21 for suspending the newly installed pipe material 5B in this way, and the protrusion for fixing the pipe | tube scaffold 30. can do. For this reason, simplification of the internal structure of the new pipe material 5B for the vertical pipe can be achieved, and removal of the protrusions or the locking portions 20 after the construction of the new vertical pipe 12 is facilitated.
また、本発明に係る管内足場３０によれば、足場本体３２が、相互の間に間隔をあけて左右両側にそれぞれ配置される側方固定足場部材３５と、側方固定足場部材３５の間に配置されて折り畳み可能な中央可動足場部材３６とを備える構成であるので、作業員Ｓが側方固定足場部材３５に足を乗せた状態で、中央可動足場部材３６の折り畳み作業や逆に折り畳まれた中央可動足場部材３６を広げてフラットにする作業を行なうことができる。また、中央可動足場部材３６を折り畳んで、作業員が当該管内足場３０を上下方向に移動する際に、作業員Ｓが側方固定足場部材３５上に足を乗せることができる。 Moreover, according to the intravascular scaffold 30 according to the present invention, the scaffold main body 32 is disposed between the lateral fixed scaffold member 35 and the lateral fixed scaffold member 35 that are respectively disposed on the left and right sides with a space between each other. Since the center movable scaffold member 36 is disposed and foldable, the center movable scaffold member 36 is folded or reversely folded while the worker S puts his / her foot on the side fixed scaffold member 35. The center movable scaffold member 36 can be expanded and flattened. Further, when the center movable scaffold member 36 is folded and the worker moves the in-tube scaffold 30 in the vertical direction, the worker S can put his / her feet on the side fixed scaffold member 35.
また、側方固定足場部材３５および中央可動足場部材３６の主要部分を、網目状部材３７によって構成しているので、管内足場３０の通気性を確保することができ、新設縦管１２の構築中に該新設縦管１２内で空気が淀むのを防止できる。 Further, since the main portions of the side fixed scaffold member 35 and the central movable scaffold member 36 are constituted by the mesh member 37, the air permeability of the in-pipe scaffold 30 can be secured, and the new vertical pipe 12 is being constructed. In addition, air can be prevented from being trapped in the newly installed vertical pipe 12.
また、中央可動足場部材３６が折り畳まれて起立状態とされた際に、該起立状態の傾斜角度を維持するストッパ３８を設けており、これにより、折り畳まれて起立状態の中央可動足場部材３６が不用意に倒れて、新設縦管１２の内面に突き当たり同内面が損傷される事態を未然に防止できる。これは、特に、新設管材料５Ｂの内面に例えば耐食性塗装等が施されている場合に有用である。 In addition, when the central movable scaffold member 36 is folded to be in the standing state, a stopper 38 is provided to maintain the tilt angle of the standing state, whereby the central movable scaffold member 36 in the folded and standing state is provided. It is possible to prevent inadvertently falling down and hitting the inner surface of the newly installed vertical pipe 12 and damaging the inner surface. This is particularly useful when, for example, a corrosion resistant coating is applied to the inner surface of the newly installed pipe material 5B.
また、足場フレーム３１を多分割構造としているので、足場フレーム３１を構成する個々の構成材３３の軽量化並びに小型化を図ることができ、既設縦管３内でそれら足場フレームの構成材３３を運搬する際、あるいはそれら構成材３３を新設縦管１２に固定する際に有利になる。 Further, since the scaffold frame 31 has a multi-partition structure, it is possible to reduce the weight and size of the individual constituent members 33 constituting the scaffold frame 31, and the constituent members 33 of the scaffold frames within the existing vertical pipe 3 can be reduced. This is advantageous when transporting or fixing the components 33 to the newly installed vertical pipe 12.
なお、本発明は、図面を参照して説明した上述の実施形態に限定されるものではなく、その技術的範囲において様々な変形例が考えられる。 The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
例えば、上記実施形態では、本発明にかかるパイプインパイプ工法を実施する上で、上側の既設横管１の一部を取り込むように立坑１０を築造し、この立坑１０を利用して既設縦管３内に新設縦管１２を構築したが、これに限られることなく、下側の既設横管２の一部を取り込むように立坑を築造し、この立坑を利用して既設縦管３内に新設縦管１２を構築してもよい。この場合、施工した新設縦管を上方へ持ち上げて、その下側に新設管材料を挿入する工法を採用すればよい。 For example, in the above embodiment, when carrying out the pipe-in-pipe method according to the present invention, the vertical shaft 10 is constructed so as to take in a part of the existing horizontal pipe 1 on the upper side, and the existing vertical pipe is utilized by using this vertical shaft 10. Although the new vertical pipe 12 was constructed in 3, the vertical shaft 12 is not limited to this, and a vertical shaft is constructed so as to capture a part of the existing horizontal tube 2 on the lower side. A new vertical pipe 12 may be constructed. In this case, a construction method may be employed in which the constructed new vertical pipe is lifted upward and the new pipe material is inserted below.
また、本発明に係る管内足場３０は、新設管材料５Ｂの内面に設けた長尺部材２１を係止するための係止部２０に固定しているが、これに限られることなく、係止部２０とは別に足場固定用の突起を設け、この突起に管内足場３０を固定しても良い。
また、本発明に係る管内足場３０は、足場本体３２を、側方固定足場部材３５と中央可動足場部材３６と備える構成にしているが、これに限られることなく、足場本体３２を全て折り畳み可能な構成にしてもよい。その場合、側方固定足場部材の機能は、足場フレームに持たしても良い。
Moreover, although the pipe scaffold 30 which concerns on this invention is being fixed to the latching | locking part 20 for latching the elongate member 21 provided in the inner surface of the newly installed pipe material 5B, it is not restricted to this, A projection for fixing the scaffold may be provided separately from the portion 20, and the intravascular scaffold 30 may be fixed to the projection.
In addition, the intravascular scaffold 30 according to the present invention has a structure in which the scaffold main body 32 includes the side fixed scaffold member 35 and the central movable scaffold member 36. However, the present invention is not limited to this, and the scaffold main body 32 can be entirely folded. Any configuration may be used. In that case, the function of the side fixed scaffold member may be provided to the scaffold frame.
１、２ 既設横管
３ 既設縦管
５、５Ａ、５Ｂ 新設管材料
１０ 立坑
１ａ 開口
１１ 下側の新設横管
１２ 新設縦管
１３ 上側の新設横管
２０ 係止部（突起）
３０ 管内足場
３１Ａ 開口
３１ 足場フレーム
３２ 足場本体
３３ 構成材
３５ 側方固定足場部材
３６ 中央可動足場部材
３７ 網目状部材
３８ ストッパ
DESCRIPTION OF SYMBOLS 1, 2 Existing horizontal pipe 3 Existing vertical pipe 5, 5A, 5B New pipe material 10 Vertical shaft 1a Opening 11 Lower new horizontal pipe 12 New vertical pipe 13 Upper new horizontal pipe 20 Locking part (protrusion)
30 In-pipe scaffold 31A Opening 31 Scaffold frame 32 Scaffold body 33 Constituent material 35 Side fixed scaffold member 36 Central movable scaffold member 37 Mesh member 38 Stopper
Claims (6)
前記既設横管の一部を取り込むように立坑を築造する立坑築造工程と、
前記既設横管の一部を切断して開口を形成する既設横管切断工程と、
前記開口から新設管材料及び足場材料を挿入する新設管材料等挿入工程と、
前記新設管材料等挿入工程で挿入された新設管材料を前記既設縦管の内部で底部から順に上方へ積み上げるとともに、積み上げた新設管材料の端部どうしを接合して新設縦管を構築する新設縦管構築工程と、
前記新設管材料等挿入工程で挿入された新設管材料を前記既設横管の内部で順に横方向につなげて配置するとともに配置した新設管材料の端部どうしを接合して新設横管を構築するとともに、構築した前記新設横管と前記新設縦管構築工程で構築した前記新設縦管とを接続する新設横管構築工程とを備え、
前記新設縦管構築工程において、前記足場材料により作られる管内足場を、前記新設管材料の内面に取り付けた突起に固定し、前記管内足場を利用して前記既設縦管内での前記新設管材料の積み上げ作業並びに前記新設管材料の端部どうしの接合作業を行なうことを特徴とするパイプインパイプ工法。 A new pipe material is inserted into the existing buried pipe having an existing horizontal pipe extending in the horizontal direction and an existing vertical pipe connected to the existing horizontal pipe and extended in the vertical direction. A pipe-in-pipe construction method for constructing a pipeline,
A shaft construction process for constructing a shaft so as to capture a part of the existing horizontal pipe,
Cutting the existing horizontal pipe to form an opening by cutting a part of the existing horizontal pipe;
An insertion process such as a new pipe material and a new pipe material and a scaffold material inserted from the opening;
The new pipe material inserted in the process of inserting the new pipe material, etc., is piled upward from the bottom inside the existing vertical pipe, and the new pipe material is constructed by joining the ends of the new pipe material that has been piled up. Vertical pipe construction process,
The new pipe material inserted in the step of inserting the new pipe material, etc. is arranged in the horizontal direction in the existing horizontal pipe, and the ends of the arranged new pipe material are joined together to construct a new horizontal pipe. And a new horizontal pipe construction step for connecting the newly constructed horizontal pipe and the new vertical pipe constructed in the new vertical pipe construction process,
In the new vertical pipe construction step, an in-tube scaffold made of the scaffold material is fixed to a protrusion attached to the inner surface of the new pipe material, and the new pipe material in the existing vertical pipe is utilized using the in-tube scaffold. A pipe-in-pipe method characterized in that stacking work and joining work between the ends of the new pipe material are performed.
前記突起に固定されて中央部分に開口が形成された足場フレームと、
前記足場フレーム上に配置されて折り畳み可能とされ、折り畳まれた際に開放される前記開口を通して人を上下方向に通過させることが可能な足場本体と、を備え、
前記足場本体は、相互の間に間隔をあけて左右両側にそれぞれ配置される側方固定足場部材と、前記側方固定足場部材の間に配置されて折り畳み可能な中央可動足場部材とを備えることを特徴とする管内足場。 An in-pipe scaffold fixed to a protrusion provided on the inner surface of a new pipe material,
A scaffold frame fixed to the protrusion and having an opening formed in a central portion;
A scaffold body that is arranged on the scaffold frame and is foldable, and allows a person to pass vertically through the opening that is opened when folded ;
The scaffold body, Ru provided with lateral fixing scaffold members are respectively disposed on the left and right sides at an interval between each other, and a central movable scaffold member foldable disposed between said lateral fixing scaffold member Intraductal scaffold characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014025426A JP6317943B2 (en) | 2014-02-13 | 2014-02-13 | Pipe-in-pipe construction and in-pipe scaffolding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014025426A JP6317943B2 (en) | 2014-02-13 | 2014-02-13 | Pipe-in-pipe construction and in-pipe scaffolding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015151735A JP2015151735A (en) | 2015-08-24 |
| JP6317943B2 true JP6317943B2 (en) | 2018-04-25 |
Family
ID=53894295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014025426A Active JP6317943B2 (en) | 2014-02-13 | 2014-02-13 | Pipe-in-pipe construction and in-pipe scaffolding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6317943B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1033372A (en) * | 1976-06-09 | 1978-06-20 | Angus C. H. Martin | Foldable platform for raised drilling |
| JPH0687557U (en) * | 1993-05-31 | 1994-12-22 | 大成建設株式会社 | Scaffolding for deep foundation work |
| JP4416071B2 (en) * | 2003-01-28 | 2010-02-17 | クボタシーアイ株式会社 | Insertion tube and manufacturing method thereof |
| JP4484684B2 (en) * | 2004-12-08 | 2010-06-16 | 株式会社クボタ | Pipe laying method |
-
2014
- 2014-02-13 JP JP2014025426A patent/JP6317943B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015151735A (en) | 2015-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8845239B2 (en) | Shoring box and related methods | |
| JP6317943B2 (en) | Pipe-in-pipe construction and in-pipe scaffolding | |
| JP2005188275A (en) | Preceding handrail for temporary scaffold | |
| JP6648387B2 (en) | manhole | |
| KR101811001B1 (en) | Steel pipe strut with safty working plate | |
| JP3692293B2 (en) | Safety handrail for assembly and disassembly of frame scaffold | |
| JP2011074659A (en) | Scaffolding member for storage tank | |
| JP2021025246A (en) | Planer-type main rope support | |
| KR102022544B1 (en) | Invert construction apparatus in a manhole and invert construction method using the same | |
| JP5279108B2 (en) | Handrail for frame scaffolding | |
| JP4747757B2 (en) | Assembled water tank | |
| JP5762174B2 (en) | Stand for widened bucket | |
| JP2017197935A (en) | Work scaffold base | |
| JP5632758B2 (en) | Foldable L-shaped baseboard and temporary scaffold incorporating this L-shaped baseboard | |
| JP2009275355A (en) | Floor attaching/detaching structure of house and remodeling method for house | |
| JP3012858B2 (en) | Handrail for frame of scaffold | |
| AU2012245054B1 (en) | Scaffold System | |
| JP6499486B2 (en) | Pile rebar | |
| KR102712047B1 (en) | Scaffold | |
| JP4700949B2 (en) | Handrail frame of framework scaffold | |
| JP2006118193A (en) | Lifting auxiliary implement set to manhole opening | |
| JP5677110B2 (en) | Construction method of cryogenic liquid storage tank | |
| JP4652926B2 (en) | Building frame and framework scaffold | |
| JP6926741B2 (en) | Scaffolding board | |
| JP3924567B2 (en) | Leading handrail assembly set and leading handrail support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20161115 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20170814 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20170829 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20171013 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20180306 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20180402 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6317943 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |