JP2006299780A - Temporary protector for end of buried pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that there is the danger of giving damages to the pipes buried by an excavation machine in pipe laying works done to repair old pipes, that the surroundings of repaired pipes must be manually dug, that sand bags have to be piled up to prevent the collapse of excavated earth walls in case of much springs, that inappropriate connection of the buried pipes is unavoidable in case of much springs, that the efforts to increase the effects of water replacement using a drain pump is expected, etc. <P>SOLUTION: The temporary protector for the end of a buried pipe is provided with a hollow skeleton open at its upper and lower parts, a buried pipe end inlet opened by notching the lower side wall edge of the skeleton, another connecting pipe end inlet opened by notching the opposite lower side wall edge of the skeleton, a connecting pipe inlet cover which can open and be removed, and a removable skeleton cover covering its top surface. Such a temporary protector or multiple such protectors are installed, and then the subsequent work to burying pipes is done. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In this invention, when burying buried pipes such as sewage pipes and water pipes, backfilling is performed once in the middle of the entire construction extension, and excavation is performed again following the previous construction at the time of the next construction. This is related to a temporary protective material to be installed at the end of the pipe that has been buried before backfilling when the next pipe is connected to the next pipe and the construction is successively carried out.

  Conventionally, as one of the construction methods of burying sewer pipes and water pipes, every day of work, a series of work of excavation by machine, pipe laying, pipe end protection, backfilling, pavement restoration, There is a construction method in which a series of operations are sequentially repeated to complete the entire target pipeline. In this construction method, after the pipe is laid, the end of the pipe is covered with a plastic bag to protect the surrounding area, and at the next construction, the part following the previous construction is excavated and gradually removed. Drilled down, took out the end of the pipe laid last time, connected the next pipe to this, and proceeded with the construction.

  In this case, the end of the tube is covered and protected with a plastic bag, etc., because the soil or sand as the backfill material comes into contact with the end of the tube and becomes dirty, and fine particles of soil or sand adhere to the end of the tube. In order to prevent the adverse effect that the degree of adhesion required for the joint portion with the pipe to be connected at the next construction is impaired.

  If there is a possibility that the excavation wall surface may collapse due to the deep excavation depth, the presence of easily crushed strata, spring water, etc., install a retaining material in conjunction with the excavation to collapse the excavation wall surface. After the pipes are laid, the work of removing the earth retaining material is added to the backfill.

  Here, as to the type of earth retaining, every day of work, a series of operations such as excavation by machine, pipe laying, pipe end protection, backfilling, and pavement restoration were performed, and this series of work was repeated in sequence. In the case of a construction method that completes the entire target pipe line, use wooden sheet piles, lightweight steel sheet piles, or built-in simple earth retaining. This is because the construction of these earth retainings does not require preparation of large heavy machinery and special equipment, and is easy to install and remove, and is suitable for a construction method in which a series of operations are repeated every day.

  Further, when the amount of spring water is large, the sandbag is piled up around the upper and lower ends of the installed pipe and then backfilled. The reason for this is that while the earth retaining method has been established for the retaining wall installed on the side wall of the pipeline, the construction method has not been established for the retaining wall installed on the transverse wall in the middle of the pipeline. When there is a large amount of spring water, a sandbag is placed in advance at the time of backfilling to prevent collapse of the excavation wall surface of the upper part and the side of the buried pipe.

  However, this method has the following problems.

  First, when performing machine excavation following the previous construction, there is a risk of damaging the pipes already buried in the excavator bucket. If the pipe is damaged, it will be necessary to go back and restart the construction. Therefore, in order to avoid such disadvantages, when digging to the vicinity of the top end of the pipe installed last time, reduce the construction speed so as not to damage the pipe, while searching for the position where the pipe is installed It must be constructed slowly and carefully.

  Secondly, the area around the pipe must be drilled manually. There is a limit to the range of work that can be performed without damaging the pipe using a drilling machine, and inevitably the area around the pipe must be drilled manually, which is much more laborious than mechanical drilling. It takes.

  Third, when the amount of spring water is large, it is necessary to backfill the sandbags after the sandbags have been piled up around and above the installed pipe ends. Sandbag making and sandbag stacking are manual work, so it takes too much time and time, and it tends to be avoided at the construction site. Also, even if you want to install it, you may not be able to install it due to the time limitation that you have to restore it during the day.

  These three issues are particularly prominent when the amount of spring water is large at the construction site, and in this case, the workability is significantly reduced, and even one pipe cannot be laid and it is even backfilled. This will be described in detail below.

  When there is a lot of spring water, the construction is designed to prevent the inflow of spring water and the collapse of the earth and sand by installing earth retaining or pre-installing sandbags around buried pipes.

  However, it is impossible to install a soil retaining at the same time as excavation at an actual construction site, and it is necessary to install the soil retaining after excavation to some extent. Therefore, it is impossible to prevent the inflow of spring water and the collapse of the earth and sand before the earth retaining is installed, and as a result, mud mixed with earth and sand accumulates on the bottom of the excavation.

  In addition, the drilling wall in the cross-pipe direction on the side where the excavation is advanced is the surface where the excavation proceeds sequentially, so there is no need to install earth retaining, spring water continues to flow in, sediment collapse occurs, and mud mixed with earth and sand. Continues to accumulate on the bottom of the excavation.

  Furthermore, as described above, sandbags that are installed in advance around the buried pipe are often not installed. In this case, the backfill material is generally pile sand, crushed stone, etc., which is not stable unlike the natural ground, so if the spring water permeates, the drilling wall will collapse, and the top of the pipe where soil and mud are buried is excavated. It accumulates on the bottom.

  The accumulated muddy water may be discharged by the drainage pump. However, if the muddy water mixed with earth and sand is to be discharged, the drainage pump is likely to break down. The water change may not be performed as expected.

  As a result, the excavation work is performed under bad conditions in which the end of the pipe and the excavation bottom surface previously laid in the muddy water accumulated on the excavation bottom surface cannot be visually observed. Excavation work in such a situation is very difficult, and in order not to damage the pipe, it must be constructed slowly and carefully so as not to compare with normal, and there is a range that depends on human power for drilling around the pipe It increases, construction speed falls extremely, and work is stagnated remarkably.

  And this work is the first work on the day of construction, and if the work is stagnant at this point, the work cannot be advanced, and depending on the situation, even one pipe cannot be laid and it is even backfilled. is there.

  Fourthly, when the amount of spring water is large, if the muddy water cannot be drained, the construction of the pipes must be performed inappropriately. When the amount of spring water is large and the mud cannot be drained, if the pipe is joined in the muddy water after excavation, fine particles of soil and sand adhere to the joint, and the adhesion required for the joint As a result, the construction of the pipes is damaged, and the construction of the pipes is inevitably inappropriate.

  Fifth, the water change by the drainage pump, which is common as a countermeasure for spring water, may not be effective to make the construction work without accumulating muddy water. It is a point expected to develop an additional device or a device for performing.

  Here, the Kamaba drainage method is one of the methods for more effectively performing the water change by the drainage pump. This is a method of deeply digging a part of the area to be excavated, holding the inner wall with a wooden board, etc., pouring spring water intensively into the inside, putting a drain pump here, and draining it. Has been demonstrated. Therefore, if the Kamaba drainage method can be adopted, improvement in workability can be expected.However, in order to adopt this method, there is room in the excavation area to install the Kamaba, and as the drilling depth increases In particular, it must be possible to lower the height of Kamaba. However, in the case of pipe embedding work in which a series of operations are repeated every day, it is necessary to proceed sequentially while finishing a short distance to the bottom surface with a narrow excavation width. Is difficult to install

  Therefore, according to the first invention of the present application, a hollow structure (2) having a hollow top and bottom, a buried pipe insertion port (3) formed by cutting out at a lower edge of a side surface of the structure (2), A connection pipe insertion port (4) formed by cutting out at the lower edge of the side surface opposite to the side surface, a connection pipe insertion port lid (6) that can open and close the connection pipe insertion port (4), and the housing (2) By installing a buried pipe end temporary protective material characterized by having a removable casing lid (8) covering the top, on the end of the installed pipe, the first, second, This is a means to solve the third and fourth problems.

  Further, in the second invention which is one form of the first invention, that is, on the hollow housing (2), the upper portion of the housing (2) is cut in the lateral direction to insert the embedded pipe insertion port (3) and the connecting pipe. Embedding with a structure in which a side wall (32) having a shape cut off from the mouth (4) and a water permeable side wall (34) formed so as to have a water permeable function on part or all of the side surface of the side wall (32) are stacked. In addition to the first, second, third, and fourth problems, the pipe end temporary protector was installed at the end of the installed pipe, thereby providing a means for solving the fifth problem.

  By using the buried pipe end temporary protector according to the first invention, the following effects are produced.

  First, if the buried pipe end temporary protective material is installed, the end of the pipe will be protected by the temporary protective material when the machine is excavated in the next construction, and the bucket of the excavating machine has been directly buried. Since there is no possibility of hitting the pipe and damaging the pipe, it is possible to avoid re-execution of construction, and the degree of prudence required for mechanical excavation work around the pipe is reduced, so that construction can be performed more quickly and construction costs can be reduced.

  Secondly, if a temporary protective material for the buried pipe is installed, a space is secured around the pipe inside the temporary protective material, so that the end of the pipe without performing manual excavation around the pipe. Can be taken out and the construction cost can be reduced more quickly.

  Third, if a temporary protective material for the buried pipe end is installed, there is an effect of retaining soil on the excavation wall surface of the upper part of the buried pipe, compared with a sandbag that is installed in advance when the amount of spring water is large. Since the temporary protective material can be easily installed, the installation is not avoided and the time and labor required for the work can be greatly reduced.

  These three effects are particularly noticeable when the amount of spring water is large at the construction site. If temporary protection material for the buried pipe end is installed, there is an effect of retaining soil on the excavation wall surface of the upper part of the buried pipe, so that the backfill material containing water can be prevented from collapsing, and mud Even if the bad condition is such that the end of the buried pipe cannot be visually observed, the end of the pipe is protected by the temporary protective material, and the bucket of the excavating machine does not directly hit the buried pipe. In addition, since a space is secured around the pipe inside the temporary protective material, it is not necessary to manually drill around the pipe. As a result, even if the amount of spring water is large, the excavation work can be performed smoothly and the work can proceed in sequence without significant stagnation.

  Fourth, if a temporary protective material for buried pipe ends is installed, even if there is a lot of spring water and muddy water accumulates on the bottom of the excavation, a space is secured around the pipe inside the temporary protective material. Since only the water that oozes out from the bottom surface enters the temporary protective material, it is possible to prevent the end of the tube from becoming dirty. In addition, even if muddy water enters when the connection pipe insertion port is opened and the connection pipe is inserted, drainage inside the temporary protective material is easy, and a margin of time can be secured until water that oozes from the bottom surface is accumulated. In the meantime, the connecting portion is cleaned, and the pipes can be connected in an appropriate state.

  Fifth, the second invention which is one form of the first invention, that is, if the buried pipe end temporary protective material having a water permeability function as a stacking type is installed, the next construction is started. Until then, the amount of water in the surrounding area can be reduced. Furthermore, since the temporary protective material can be used as a pot during excavation, the effect of water replacement by the drainage pump is improved. These drainage effects are very good compared to the case where water is replaced by a drainage pump without installing the temporary protective material.

  Next, although it is a form of an embedding pipe end part temporary protection material, an example is shown and demonstrated below to an accompanying drawing.

  FIG. 1 is a perspective view showing an embodiment of the first invention. The embedded pipe insertion port 3 is formed by cutting out the lower edge of the side surface of the hollow structure 2 having a hollow top and bottom, and the connection pipe insertion port 4 is formed by cutting out the lower edge of the side surface opposite to the side surface. The connecting pipe insertion port 4 can be opened and closed, and a removable connecting pipe insertion port lid 6 and a removable casing lid 8 covering the casing 2 are provided.

  The connection pipe insertion port lid 6 is made removable by attaching slide rails 7A and 7B to the outside of the side surface of the housing 2 and inserting the slide rails 7A and 7B. A slip stopper 9 and a drop-type handle 10 are attached to the housing lid 8. In addition, hanging holes 38A and 38B are made in the side wall of the housing 2 or hanging metal fittings are attached, and a hook or the like is hung on this.

  The handle 10 is of a drop-in type because there is a risk that if the handle is extended and fixed on the upper surface of the lid 8, the handle is caught by the packet of the excavating machine and the temporary protective material and the pipe are damaged during excavation work. Because there is. Therefore, it does not matter that the handle is not attached, only the hole is made, and the lid is attached and detached by hooking the hole or the like to the hole.

  The opening size of the buried tube insertion port 3 and the connecting tube insertion port 4 is set so as to maintain a certain distance from the outer shape of the buried tube. The reason for this is to prevent the temporary protection member for the buried pipe end from moving against the buried pipe or sinking after being buried to hit the buried pipe.

  In FIG. 1, sinking prevention plates 5A and 5B are provided at the bottom of the housing 2, but these are members that are attached to prevent sinking in places where the ground is loose, and are not essential.

  In FIG. 1, the horizontal cross-sectional shape of the housing 2 is a square, but other shapes such as a circle and an ellipse may be used. In that case, the surface shape of the connecting pipe insertion port lid 6 is matched with the surface shape of the side surface of the casing 2, and the outer shape of the casing lid 8 is matched with the horizontal sectional shape of the casing 2.

  FIG. 2 is a supplementary explanatory diagram of the embodiment shown in FIG. 1 and shows a state in which the connecting pipe insertion port lid 6 is removed in order to clarify the location of the connecting pipe insertion port 4.

  FIG. 3 is a plan view of Example 2 of the connection tube insertion port lid provided in the connection tube insertion port 4, and FIG. 4 is a front view thereof. Example 2 of the connection tube insertion port lid provided in the connection tube insertion port 4 has a structure in which fitting metal fittings 12A, 12B, and 12C are attached to the connection tube insertion port cover plate 11 along the edge line 13 of the connection tube insertion port.

  About the material of the buried pipe end temporary protection material, it is necessary to have a strength sufficient to withstand the earth pressure at the place where the buried pipe is installed. There are pipes, manholes, and simple built-in earth retaining structures in the same places where the temporary protective material is used. Vinyl chloride, cast iron, steel, reinforced concrete, resin used as these materials Since all materials such as concrete, casting, and steel frame panels have been calculated for strength against earth pressure, the thickness of the member can be calculated based on this, and the buried pipe end temporary protective material can be manufactured. .

  Hereinafter, the method of using the buried pipe end temporary protector will be described with reference to FIGS.

  FIG. 5 shows that the buried pipe end temporary protective material 1 is installed at the end of the buried pipe 14, and the gap between the buried pipe insertion port and the buried pipe 14 is filled with the filling member 17 and then backfilled. FIG. 6 is a vertical sectional view taken along the center line of the pipe when the section 15 is restored with on-site generated soil, mountain sand, crushed stone, asphalt mixture, and the like, and FIG. 6 is a horizontal sectional view thereof.

  It is a feature of the present invention that the end of the buried tube 14 is isolated from the backfill portion 15 by the buried tube end temporary protection member 1 and the space 16 can be secured.

  As for the filling member 17, development of a dedicated product is expected as the buried pipe end temporary protective material is commercialized and spread, but until then, existing members used for other purposes are diverted.

  FIG. 7 is a schematic view of a water stop flexible joint for human holes. This is a member installed at the connecting part between the human hole and the pipe. The embedded cylinder part 20 is fitted into the hole formed in a predetermined part of the human hole, the collar part 19 is attached to the outer surface of the human hole, and the pipe insertion cylinder part A tube is inserted from 21 and fixed for use. The material is a special synthetic rubber, which has been demonstrated to be flexible and strong enough to withstand the use of the part.

  If the water stop flexible joint 18 for manholes is used as a filling member as it is, since the collar portion and the cylindrical portion are closed, the joint cannot be removed after the next pipe is connected. Therefore, a processing method for using the joint as a filling member will be described with reference to FIG. The collar part 19 is cut at the collar part cutting part 22 to remove the lower part, and the tube insertion cylinder part 21 and the embedded cylinder part 20 are cut at the cylinder part cutting part 23 to create the filling member 17. The interlining member 17 is cut at the tube portion cutting portion 23 with respect to the collar portion and the tube portion, and thus has an open shape.

  FIG. 9 is a vertical cross-sectional view along the tube center line during excavation of the portion where the buried pipe end temporary protective material 1 is installed and backfilled in the next construction. The excavation of the 24 part is finished, and then the 25 part is excavated. Here, the end of the buried pipe 14 is isolated from the planned excavation part 25 by the buried pipe end temporary protection material 1.

  When there is no spring water and when the water is drained normally, after excavation is completed, the buried pipe end temporary protection member 1 and the interposing member 17 are removed, and the next pipe is connected to proceed with the construction.

  If there is spring water and muddy water is accumulated on the bottom of the excavation, remove the enclosure lid with the buried pipe end temporary protector 1 and the interlining member 17 installed, and connect the next pipe inside it. The buried pipe end temporary protective material 1 and the interstitial member 17 are removed and the construction is advanced.

  The detailed procedure will be described with reference to the drawings. FIG. 10 is a horizontal cross-sectional view at the tube center line in a state where the muddy water 26 is stored. After removing the housing lid, remove the connection tube insertion port lid, attach the padding member 17 in the vicinity of the tube end of the tube 29 to be connected next, insert it into the connection tube insertion port, and padded with the buried tube end temporary protective material 1 The sandbag 27 holds the member 17 so that the member 17 is in close contact. During this operation, the muddy water 26 flows into the inside of the buried pipe end temporary protective material 1, so that it is discharged, and after the joint portion of the pipe 29 connected next to the buried pipe 14 is cleaned, The pipe 29 to be connected is pushed in the direction of the arrow to connect the pipes. Although not shown in the drawing, the embedded pipe 14 and the end of the pipe 29 to be connected next are covered and protected in advance with a plastic bag or the like until the pipe is connected in order to prevent contamination. And good. When the connection of the pipes is completed, the buried pipe end temporary protective material 1 and the interstitial member 17 are removed and the construction is advanced.

  FIG. 11 is a block diagram showing an embodiment of the second invention. A side wall 32 formed by cutting the upper portion of the housing 2 in the horizontal direction and cutting off the embedded tube insertion port 3 and the connecting tube insertion port 4 and below, and a part or all of the side surfaces of the side wall 32 are provided with a water-permeable function. The water-permeable side walls 34 are stacked, and an intermediate lid 30 is further arranged. Although omitted in FIG. 11, the housing 2 is disposed under the intermediate lid 30. Hereinafter, in order to distinguish from the first invention, the second invention is referred to as a stacking type buried pipe end temporary protection material.

  The intermediate lid 30 is formed by attaching a shift stopper 31 to the upper surface of the housing lid 8 in FIG.

  The side wall 32 is prepared with a plurality of height members so that the overall height can be adjusted. In addition, as for the misalignment stopper 33, two types of members that are attached and members that are not attached are prepared. A member to which the displacement stopper 33 is not attached is used when the member is disposed on the intermediate lid 30.

  The water-permeable side wall 34 is formed by opening a hole 35 in the side surface of the side wall 32 to provide a water-permeable function.

  Next, a method of using the above-described stacked type buried pipe end temporary protective material will be described with reference to FIG. The stacking type buried pipe end temporary protective material is suitable for combining the intermediate lid 30, the side wall 32, and the water permeable side wall 34 on the housing 2 when it is desired to further increase the drainage efficiency by the drainage pump at a location where there is a lot of spring water. Stack and use lid 8 at the top.

  The combination is determined so that the water-permeable side wall 34 is at the height of the aquifer 37 that is the source of the spring water.

  The intermediate lid 30 is installed to protect the buried pipe, prevents inflow of water and muddy water, and when the drainage pump is inserted into the temporary protective material for the end of the buried buried pipe. This prevents the pipes already embedded in the pipe from being damaged. Therefore, it is not necessary to install it if it is not necessary.

  If the stacking type buried pipe end temporary protective material is installed in this way, the aquifer is formed from the hole 35 of the permeable side wall 34 until the next construction and while excavating above the aquifer. Since the water is soaked in and accumulates in the temporary protective material, the accumulated water is drained by a drain pump.

  Further, during excavation, each member is sequentially removed according to the progress of excavation, and the height is adjusted to use as a pot. .

The perspective view which shows the Example of 1st invention Supplementary explanatory diagram of the embodiment of the first invention Plan view of connection pipe insertion port lid example 2 Front view of connection pipe insertion port lid example 2 Vertical sectional view showing the installation status of the embodiment of the first invention Horizontal sectional view showing the installation status of the embodiment of the first invention Perspective view of waterproof joint for human hole Front view showing a method for processing a filling member Vertical sectional view showing the state of excavation at the place where the embodiment of the first invention is installed Horizontal sectional view showing the situation where muddy water has accumulated at the place where temporary protection material for buried pipe ends is installed The block diagram which shows the Example of 2nd invention Vertical sectional view showing the installation status of the embodiment of the second invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Buried pipe end part temporary protective material 2 Housing 3 Buried tube insertion port 4 Connection tube insertion port 5A Settlement prevention plate 5B Settlement prevention plate 6 Connection tube insertion port lid 7A Slide rail 7B Slide rail 8 Housing lid 9 Housing lid slip stopper 10 Housing lid Handle 11 Connection pipe insertion port cover plate 12A Fitting metal fitting 12B Fitting metal fitting 12C Fitting metal fitting 13 Connection pipe insertion port wire 14 Buried pipe 15 Refilling part 16 Space 17 Stuffing member 18 Human hole waterproof joint 19 Collar part 20 Embedded cylinder part 21 Tube insertion cylinder part 22 Cut part of rib part 23 Pipe part cut part 24 Excavated part 25 Excavated part 26 Mud water 27 Sandbag 28 Earth retaining 29 Next pipe 30 to be connected Intermediate cover 31 Displacement stop 32 Side wall 33 Displacement stop 34 Water permeable side wall 35 Hole 36 Displacement stop 37 Water retaining layer 38A Hanging hole 38B Hanging hole

Claims (2)

  A hollow structure (2) having a hollow top and bottom, a buried pipe insertion port (3) formed by cutting out at a lower edge of the side surface of the housing (2), and a lower edge of the side surface opposite to the side surface A connection pipe insertion port (4) formed by cutting out, a connection pipe insertion port lid (6) which can be opened and closed and which can be opened and closed, and a removable cover which covers the housing (2). A buried pipe end temporary protector characterized by having a housing lid (8).   A side wall (32) having a shape obtained by cutting the upper part of the casing (2) in the horizontal direction and cutting off the embedded pipe insertion port (3) and the connecting pipe insertion port (4) below the hollow structure casing (2). The buried pipe end temporary protection according to claim 1, characterized in that a water permeable side wall (34) formed by providing a water permeable function to part or all of the side surface of the side wall (32) is stacked. Wood.

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