JP4761386B2 - Construction method of impermeable walls - Google Patents

Description

  The present invention relates to a waste sea surface disposal site for landfill disposal of industrial waste and general waste by building a revetment with a sheet pile wall so as to partition a part of the sea, and a sheet pile wall itself constructed as a partition revetment It is related with the construction method of the water-impervious wall which makes it possible to maintain the water-imperviousness of water more reliably and prevents the waste stored in the compartment from contacting the outside seawater.

  In order to dispose of industrial waste and general waste, building a landfill site in a remote mountainous area is something that many local governments and companies are doing. In addition, in local governments located along the sea, the coast is used as one side of the partition, a revetment is constructed so as to surround the sea part, and waste is put inside the section that partitions the sea. The method of depositing (disposal) is used. As the partition revetment, it is known to construct a revetment with piled steel (pipe) sheet piles, caissons, or rubble. In this way, a new land surrounded by the revetment is constructed and used effectively. Many have been proposed to do. In the partition revetment that separates the landfill disposal site for waste, the water that touches or exudes from the waste in the disposal site is water that contains a lot of harmful components and should be discharged as it is. Is not possible.

  Therefore, in order to prevent such contaminated water from leaching into the open sea, the surrounding area is partitioned by a partition revetment, and the contaminated water is partitioned by a wall portion provided on the revetment main body or independently. It has been sealed in, and after being detoxified, it is subjected to water shielding treatment that flows to the open ocean. In addition to partitioning with the partition revetment, the wastewater is completely separated from the seawater outside by performing water-impervious treatment on the seabed in the area where the disposal site is constructed. It is demanded to store in the state.

  In order to construct a revetment that has been subjected to the water-impervious treatment as described above, steel sheet piles such as steel pipe sheet piles and other arbitrary cross-sectional sheet piles are conventionally placed in a single row, and the sheet pile row shields. Building water walls is being done. In addition, a caisson made of concrete or the like is set up in combination with the water-impervious wall by the sheet pile, and a double partition is provided between the outside sea, or constructed as a revetment using only the rows of the structure. Means are used. And with construction of the partition revetment which has the above-mentioned various structures, processing which gives impermeable property to the seabed ground which has permeability, and water flows out from the gap of the wall of the standing structure In order to prevent pollution, even if waste is stored in the compartment for a long period of time, it is treated so as not to cause pollution.

For example, when constructing a water shielding wall by placing sheet piles in a row, an example of constructing a water shielding wall with only a sheet pile is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-162353 (Patent Document 1). As described above, it is known to construct a steel sheet pile having an arbitrary cross-sectional structure. And the process which adds a water-impervious material to the connection part of the said steel sheet pile, and has a water-impervious effect so that water may not distribute | circulate through the clearance gap between joints (joint part) is added. As the water shielding material, it is common to use a mixture mainly composed of asphalt as a material that can satisfy conditions such as water shielding performance, handleability, cost, and durability. By filling such a water shielding material in the space of the joint portion of the sheet pile, it is supposed that the water shielding and durability are satisfactorily exhibited at the connection portion of the steel (pipe) sheet pile constituting the water shielding wall. . In addition to the impermeable wall made only of sheet piles constructed by placing in a row, a composite impermeable structure provided by combining a caisson standing and constructed in one row with a sheet pile wall, What was built by standing up a sheet pile wall in 2 rows etc. is suitably selected according to the location conditions.
JP 2004-162353 A

  As shown in the conventional example, by providing female and male joint members on both sides of the steel sheet pile, and combining the joint members, constructing a sheet pile wall, Consists of walls that have been given. Furthermore, when using a method of filling a water shielding material such as an asphalt mixture inside the space portion of the connection portion, the space portion provided in the joint portion of the sheet pile is formed as having a sufficiently large cross-sectional area. Then, a sealing process is performed by pouring a water shielding material into the space so that no gap is formed inside the space. And in the season when the water temperature is high, even if the temperature for heating the asphalt mixture is set at about 160 ° C., the asphalt mixture does not solidify or the flowability is not affected. It becomes possible to seal the internal space of the joint portion with a water shielding material without a gap.

  However, when the temperature is low, the temperature of the seawater is greatly reduced, and even if the temperature for heating the water shielding material is heated to a high temperature of about 180 ° C, There is a problem in that the properties are greatly reduced and become a lump. Therefore, the water shielding material to be injected into the joint portion of the steel sheet pile is immediately in contact with the low-temperature water and becomes a mass, and further cooled as it falls in water, as shown in FIG. When reaching the lower part of the water barrier layer, a layer of a water shielding material is formed in a state in which a gap is formed in the upper and lower directions as a lump. Therefore, when the impermeable wall is constructed without noticing the above-mentioned state, the contaminated water always flows out through the gap from the waste disposal site partitioned by the impermeable wall. Therefore, it is inevitable that environmental pollution will become a major problem.

  In the present invention, when building a management-type revetment that divides a waste sea surface disposal site with a sheet pile wall, the joint portion of the steel sheet pile can be filled with a water shielding material without any gap, and the water shielding performance can be extended for a long time. The purpose is to provide a construction method that can easily and inexpensively construct a water-proof structure for a management-type revetment that can be maintained throughout.

This application constructs a water-impervious wall along the coast or to divide any part of the sea, and uses the inside of a section surrounded by the water-impervious wall as a waste disposal site for impermeable It relates to the wall construction method.
In invention of Claim 1, connecting the connection part which provided the said water shielding wall in the edge part of a steel sheet pile, and standing and constructing in a line form, the connection of the both ends of the steel sheet pile of the said water shielding wall The interior space of the part is filled with a water shielding material using an asphalt mixture to ensure water shielding at the connection part of the steel sheet pile of the water shielding wall,
Using the method of injecting the water shielding material from the upper part of the internal space of the connecting portion of the steel sheet pile and filling the water shielding material upward from the bottom of the internal space of the connecting portion, the steel When filling the inner space of the connection portion of the sheet pile with the water shielding material, while preventing the impurities such as water and mud in the inner space of the connection portion from being mixed into the water shielding material, With a filling
In order to assist the injection of the water shielding material in the internal space of the connection portion of the steel sheet pile, a lower end portion is opened and a pipe having a hole in the side wall portion is erected in the internal space of the connection portion. And
When the water shielding material is injected from the upper part of the internal space of the connection portion of the steel sheet pile and the water shielding material is filled into the internal space of the connection portion, the water shielding material filled in the space portion. By the pressing action, impurities such as water and mud remaining in the internal space are moved upwardly through the pipe and filled while being removed.

In order to assist the injection of the water shielding material in the internal space of the connection portion of the steel sheet pile, the invention of claim 2 is arranged by standing up a hollow pipe with both upper and lower ends opened,
Impurities such as water from the lower part of the internal space of the connection part, and the upper part of the internal space through the pipe, depending on the space where the water in the lower part is pressurized by the water shielding material injected from the upper part of the connection part To discharge
The water shielding layer is constructed so that impurities such as water and mud are not mixed in the water shielding material filled so as to close the internal space of the connecting portion from above.

In the invention of claim 3, the pipe used as an auxiliary means for filling work when filling the space of the connecting portion of the steel sheet pile with the water shielding material has a circular, square or other arbitrary cross-sectional shape. Use things
In the middle of the operation | work which inject | pours the said water shielding material into the internal space of the connection part of steel sheet piles, it constructs | assembles as a water shielding layer which removed the said pipe, pulling up the said pipe at arbitrary timings.

According to a fourth aspect of the present invention, when the connecting portion of the steel sheet pile is filled with the water shielding material, the pipe used as an auxiliary means for filling work is circular or has a square or other arbitrary cross-sectional shape. Use
In the case where the performance of the water shielding layer is not hindered, the water shielding layer is formed by leaving the pipe embedded in the water shielding material.

Invention of Claim 5 includes the connection part comprised so that the connection part provided in the both sides of the width direction of the steel sheet pile etc. which adjoin and stand may be combined with the connection part of the said steel sheet pile. With
A water-impervious layer in which the space portion of the connection portion is filled with the water-impervious material is provided so that water does not leak out of the section from the inside of the section partitioned by the revetment through the space.

  In the invention of claim 6, in the sheet pile wall constructed by standing the steel sheet pile, when the space cross-sectional area of the connection portion of the steel sheet pile is large, a large stone is put in the space cross section in advance. The solid water shielding layer is constructed by filling the water shielding material so as to fill the space.

  As mentioned above, by constructing the impermeable wall on the disposal site side of the management-type revetment as an upright impermeable wall that can fully demonstrate the impermeable performance, the contaminated water on the disposal site side flows into the open sea. Can be prevented. In the revetment main body, it is possible to construct a sheet pile wall in which sheet piles are erected in combination with a caisson dam body, and steel sheet piles are erected in one or two rows, and the steel sheet pile joint portion Or it becomes possible to comprise the water-proof wall of a strong management type revetment by performing a water-proof process with respect to a side surface.

  In addition, by constructing the water shielding wall by combining a sheet pile wall and a water shielding material, a water shielding treatment was performed at the joint portion of the steel sheet pile, which was said to have been a weak point in the conventional construction method, The reliability of the construction method of the impermeable wall can be improved. Furthermore, as a sheet pile used for the said water-impervious wall, it is possible to use H-section steel and other sheet piles of arbitrary cross-sectional shapes, such as leaving a sheet pile along with a water shielding layer. It is also possible to use.

  In addition, the water-impervious wall can be constructed only by sheet piles that stand up in a self-supporting manner by driving the lower end into the seabed ground, such as steel sheet piles, steel pipe sheet piles, or concrete, or It is also possible to use a material that exhibits properties as a partition member such as wooden, in any combination with the steel sheet pile. In addition, after the sheet piles are erected to construct a row of sheet pile walls, water shielding is provided for filling the space between the sheet pile walls and the space between the sheet pile main body or the joint part, respectively. The material may be filled with either an asphalt mixture or a soil-based water-blocking material, a concrete-based water-blocking material, or another substance capable of exerting water-blocking properties, and processed so as not to create a gap in the space. Is possible. And it becomes possible to improve the reliability of the constructed water-impervious layer by using means for flowing the water-impervious material using auxiliary means in a narrow space of the joint part.

(General structure of partition revetment)
The construction method of the water-impervious revetment with good water-imperviousness according to the present invention will be described according to the illustrated example. In the embodiment described below, the seabed ground 1 for constructing the impermeable wall is a ground layer having water permeability such as sand at a predetermined depth from the bottom of the sea, and an impermeable hard ground 2 is formed in the lower part thereof. Assume that it exists. When constructing the partition revetment 10 on the submarine ground 1, the support layer is first used with respect to a predetermined range of the sand layer requiring water shielding, centering on the portion where the structure is erected. The treatment is constructed and constructed as an improved soil layer 3.

  In describing the embodiments, the terms of the land side and the sea side or the open sea side are used, but this is not necessarily limited to one side of the section of the disposal site being the coast. And even if the whole of the partition revetment is constructed in a part away from the coast, the surface that is greatly affected by the waves is referred to as the open ocean side, and the part that is less affected by the waves is referred to as the land side. .

  In the area where the disposal site is constructed, on the improved soil layer 3, a large crushed stone is piled up to a predetermined height and width to construct a basic rubble layer 5, which is leveled so that the unevenness on the upper surface is reduced. The caisson 12 is erected and the revetment main body 11 is constructed. In addition, an asphalt mat or the like is laid on the upper surface of the basic rubble layer 5, and a caisson or the like standing thereon is used as a member for preventing sliding on the stone layer. In addition, as with the conventional example, with regard to means such as sliding sledge used as an auxiliary when installing the caisson on the foundation, it depends on the wave pressure received by the revetment body and other location conditions of the revetment. Are appropriately selected. Further, a means for protecting the surface of the rubble layer 5 from the wave pressure is constructed on the surface portion of the rubble layer 5 on the ocean side by constructing a covering stone layer 6 covered with a large stone if necessary. Provided.

  In the example of the partition revetment 1 illustrated in FIG. 1, a sheet pile wall 15 is constructed at a predetermined interval on the land side of the revetment main body 11 where the caisson 12 is erected, and the revetment main body 11 and the sheet pile wall 15 are The backside stone layer 7 is constructed between them to protect the back side of the caisson 12. In addition to providing a protective layer 8 made of sand or the like on the backside stone layer 7, an upper structure is constructed above the revetment main body and the protective layer, and a groove is provided to provide rainwater or the like. And facilities and structures for using the upper surface as a passage are provided. A sandproof sheet 17a is laid between the protective layer and the lining stone layer 7 and used as a means for separating and draining water accumulated on the upper part of the partition revetment 10.

  In the example illustrated in FIG. 1, waste is dumped and deposited on the land side partitioned by the sheet pile wall 15, and if necessary, the land side surface of the sheet pile wall is water-impervious. A water shielding layer by the sheet 17 is constructed and constructed as a water shielding layer in which the steel sheet pile wall 15 and the sheet 17 are combined. It should be noted that the seabed ground in contact with the waste accumulation layer 9 is contaminated by contact with the waste by performing a treatment such as laying a water shielding sheet or constructing an improved soil layer as necessary. The water should be sealed to prevent adverse effects such as water flowing out to the open sea through the seabed and permeating into groundwater.

  In the example illustrated in FIG. 2, the partition revetment 10 a is constructed by standing up two layers of sheet piles at predetermined intervals. In the partition revetment 10a, sheet pile walls 15 and 16 are provided, and as the sheet pile wall, a steel sheet pile having an arbitrary type / cross-sectional structure as described later can be used. . And, when the steel sheet pile is erected, the caisson is installed by driving the impermeable layer 2 of the seabed ground to reach a predetermined depth so that each sheet pile wall can stand independently. In the same way, the sheet pile wall can work as a partition revetment for a long time. In the sheet pile walls 15 and 16 erected in the two rows, a water-impervious sheet is disposed on one or both surfaces of the wall, and the water-impervious wall is provided by the two water-impervious walls of the wall and the sheet. It is also possible to perform well.

  In the example of the partition revetment 10a shown in FIG. 2, between the sheet pile walls 15 and 16 erected in two rows, the permeable layer on the impervious ground 2 is improved, and the improved soil layer 3 is not improved. A water permeable layer is provided, and a filling layer 8 is provided thereon. Further, the upper surface of the filling layer 8 is constructed as a top protective layer 18 or an upper structure having the same structure as in FIG. 1 by constructing a concrete or asphalt layer with a predetermined thickness. And by using the land side of the sheet pile wall 16 as the waste accumulation layer 9, it is possible to construct and use a disposal site cut off from the open ocean.

  In the example of the partition revetment described in FIGS. 1 and 2, a steel sheet pile having a structure as shown in FIG. 3 is used. The steel sheet pile shown in this example has a shape in which a flange member is added to a normal H-shaped steel, and is connected between side plate members (web members) 32 provided on both sides (front and back surfaces) via a predetermined interval. An intermediate plate member 33 is arranged as a plate member (flange member). And the joint member is provided in the state which extended each side plate in the both ends of the box-shaped member. As the special box-shaped sheet pile 31..., For example, a steel sheet pile (trade name NS-BOX box type) sold by Nippon Steel Corporation is used. In the box-shaped sheet pile, joint members are integrally provided at both ends of the side plate, and the joint members are combined and combined as the connection portions 34 and 34a. In the following description of steel sheet piles used in the present invention, all types of sheet piles having different structures are also referred to as “steel sheet piles” without using terms indicating their specific structures. explain.

  Using a steel sheet pile (special box-shaped sheet pile) 31 having a configuration similar to that of the H-shaped steel as illustrated in FIG. 3 and connecting to an adjacent sheet pile using two parallel side plates. The sheet pile wall 30 is constructed. In that case, the wall in which a clearance gap is not formed can be constructed | assembled between adjacent steel sheet piles by combining the sheet piles which are made to adjoin and a joint member. The steel sheet piles 31, 31 a... Are combined at the connection portions 34, 34 a... And placed on the seabed ground while being sequentially connected, and then the water shielding material 36 against the space 35 of the connection portion of the steel sheet piles. We perform construction to fill up.

  And it can seal so that water may not leak from the small clearance gap in the combination part of the connection parts 34, 34a ... of the said sheet pile. The water shielding material will be described by taking as an example the case of using an asphalt mixture that can satisfy the handling properties and other conditions and is most frequently used in practice. In addition, even when using a water shielding material mainly composed of other clay other than asphalt or a water shielding material using other materials, the shape of the member constituting the connecting portion as in the example described below The function and the like can be applied as they are.

  However, when constructing the sheet pile wall 30, when the space 35 of the connecting portion 34 between the steel sheet piles is filled with the water shielding material 36 to construct the water shielding layer, the water shielding material is filled without a gap. A problem may arise in the performance as a water-impervious wall with the inconvenient state of not being performed. In other words, when a water shielding material is injected from above into the space of the connection part of the sheet pile, when the cross-sectional area of the space is narrow or when the water temperature is low, the environmental conditions of other filling workplaces are asphalt mixture. In the case of a state that is not suitable for handling, there is a concern that a gap may remain in the water shielding material filled in the connecting portion, causing a problem in the water shielding performance.

  When constructing the sheet pile wall as described above, a case where the water shielding material may be difficult to be filled will be described with reference to FIG. In the example illustrated in FIG. 7 and FIGS. 4 to 6 which will be described later as an embodiment of the present invention, only the joint portion of the steel sheet pile is shown in an independent state, and reference numeral 15 is attached to the sheet pile wall. The steel sheet pile 20 and the internal space 21 of the connecting portion are respectively described with reference numerals.

  As illustrated in FIG. 7, an asphalt mixture serving as a water shielding material is injected into the internal space 21 of the connection portion of the sheet pile 20 of the sheet pile wall 15 from above to fill the space portion 21. It is dropped while removing water and filled so that there is no gap in the layer of water shielding material. For example, when the water shielding material is an asphalt mixture, in an environment where the water temperature is 20 ° C. or higher, the water shielding material can be filled without gaps and the internal space can be closed without gaps.

  However, during the season when the outside air temperature is low, the seawater temperature may be lowered to 15 ° C. or lower, and it may be necessary to perform the work of filling the water shielding material in an environment where the fluidity of the asphalt mixture is likely to be hindered. . In such a low temperature environment, it is conceivable to perform the operation of injecting the water shielding material by using a water shielding material heated to a high temperature so that the water shielding material is not easily solidified even in contact with low temperature water. However, when the internal space of the connection portion is long, that is, when a wall is constructed by placing a sheet pile on the deep sea floor, the internal space of the connection portion is configured to be very long (high). The Therefore, even if the water shielding material injected from the upper part of the sheet pile wall, that is, the upper part of the space of the connection part is hot, the fluidity of the asphalt mixture is lost while dropping a long distance while pushing away the cold water. Thus, it is assumed that the lumps 36a may fall without being deformed by falling in the state of the lumps 36a and sandwiching water in the bottom portion of the internal space.

  As described above, in a work site in a low temperature environment, a gap may remain in the water shielding material filled in the sheet pile connection portion, thereby causing a problem that the water shielding in the water shielding layer is hindered. As described with reference to FIG. 7, the present invention remains in a state where a water mass is sandwiched between the water shielding material mass 36a whose surface is hard and loses its fluidity. 4 to FIG. 6 show examples of the solution. FIG. 4 to FIG. 6 show an example of the solution.

  In order to solve the above-described problem, for example, a countermeasure as illustrated in FIG. 4 may be used. In this embodiment, the pipe 22 is provided in the interior space of the connection portion of the sheet pile, and the pipe 22 is provided with a large number of holes 23. Even if it falls, the mass acts to push the water and remove it through the pipe. Then, the water shielding material descends while removing the water in the lower part, and the water is naturally removed from the lower part of the internal space, so that the water is finally sandwiched between the water shielding materials. It is made not to remain in the state. Further, since the perforated pipe 22 provided in a suspended manner bears only the action of passing water at the lower part of the hole, a relatively thin pipe can be used. There is no obstacle to the action.

  In the example shown in FIG. 5, the pipe 22 that hangs down in the space 21 between the sheet piles is provided so as to eliminate the water accumulated at the bottom of the hole by providing an opening only at the lower end without providing a hole. . In this example, the upper part of the pipe 22 is curved and positioned in the drainage groove 24, and a water shielding material is injected from the upper part of the space of the connecting portion, and the pressure of the water shielding material is applied to the water accumulated inside. The water removed from the bottom of the space as it is pushed out is guided through the pipe towards the top. In addition, in this way, by causing the pipe 22 to act to remove water from the bottom portion of the space portion, small lumps of soil and mud-like mixture (impurities) that are likely to accumulate in the bottom portion are removed together with water. As a result, the water shielding layer can be constructed so that impurities are not included in the water shielding material.

  In the example shown in FIG. 6, a drainage pump is installed on the upper part of the pipe 22 that hangs down in the connection part space, and the water filled in the connection part space 21 is sucked by the pump 25, Build a water barrier while letting it drain. In the example shown in FIG. 6, it is also effective to lower the water level by draining the stagnant water in the space of the connecting portion by removing the water from the beginning by the pump 25. As another method, there is a method in which water corresponding to the injection amount of the water shielding material is sucked from the lower end portion while injecting the water shielding material from the upper part of the space of the connection portion. According to this method, it is possible to prevent the water from remaining in the lower portion of the connection portion of the sheet pile by simultaneously performing the operation of injecting the water shielding material from the upper portion of the space and the operation of removing water from the lower portion. It helps to form a water-blocking layer by preventing impurities such as water, mud, and fine soil masses from mixing in the water layer.

  As described above, when constructing the sheet pile wall, a pipe for assisting injecting the water shielding material is inserted into the space of the connecting part of the steel sheet pile, and water is passed through the pipe from the bottom of the vertical hole. It is possible to prevent water and the like from remaining in the water shielding layer formed sequentially from the bottom portion. The pipe hanging down in the space of the connecting portion may be extracted and removed at an arbitrary timing, and the pipe is left for use for any purpose after filling (filling) the water shielding material. In other cases, the injection auxiliary pipe may be extracted and the holes remaining in the traces may be naturally blocked using the fluidity of the water shielding material.

Further, regarding the work of inserting the pipe into the space of the connecting portion and filling the water-impervious material, what is illustrated as the pipe 26 in the example described in FIG. 3 is used.
Separately from the example of FIG. 3, also in the example of the water shielding wall described in FIG. 8 and the subsequent drawings, the space portion of the sheet pile connection portion is filled with a water shielding material, and the steel sheet pile connection portion of the water shielding wall, A pipe having various structures similar to that described in FIG. 3 is used as an auxiliary means as a means for satisfactorily setting the water shielding action at that portion. Moreover, as the water shielding material to be filled in the connecting portion of the steel sheet pile, any water shielding material that is often used at the construction site of the water shielding layer can be targeted, and the asphalt mixture It is not limited.

Separately from FIG. 3, the examples of the water-impervious walls described in FIG. 8 and subsequent figures illustrate examples of different steel sheet pile structures, and are actually used to construct a partition revetment. The example which water-proofs to the connection part is demonstrated with respect to the steel sheet pile.
As described in FIG. 3, in addition to the landfill partition revetment constructed using the box-shaped steel sheet pile (special box-shaped sheet pile), as the landfill partition revetment, there are various types as described in FIG. By using sheet piles having a cross-sectional shape, a water-impervious wall can be constructed, and a water-impervious treatment in which a water-impervious material is filled can be performed on the connection portion between the sheet pile walls. Then, as the cross-sectional area of the connecting portion is smaller, the water inside the connecting portion, as described in FIG. The material can be packed without gaps.

  In the example shown in FIG. 8, the impermeable wall 40 uses a sheet pile having a substantially U-shaped cross section, and is constructed so as to cover a connection portion between two sheet piles with a joint plate and cover as one connection portion. Yes. In this example, the inner space of the connecting portion is filled with a water shielding material, so that it is constructed as a wall that can satisfactorily exhibit water shielding. In the water-impervious wall 40 described in FIG. 8, the sheet pile members 41, 41a,... Are sequentially placed adjacent to each other by changing the direction of the U-shaped grooves so that the wall irregularities are alternately formed. A large cross-section surrounded by the sheet pile member and the intermediate plate by arranging the intermediate plate 45 so as to cover the two connecting portions 42 and 42a on both sides of the sheet pile member 41 to be placed from the inside of the recess. The connecting portion 44 is formed. Then, by filling the space of the connection portion 44 with a water shielding material, it is possible to perform a process that can satisfactorily exhibit the water shielding performance for the portion including the connection member.

  In the embodiment of the impermeable wall using the sheet pile members 41, 41a, the intermediate plate 45 is constituted by using a flat plate having an arbitrary thickness, and elongated plates are attached to both ends of the intermediate plate 45, etc. The processed insertion portions 46 and 46a are provided. And with respect to the sheet pile member 41 which exposed the groove | channel, the said insertion part is inserted and fixed to each of the to-be-inserted parts 47 and 47a provided in the outer surface part of the sheet pile member of the both sides, The recessed part of a sheet pile member And the connection part 44 as an enclosed space part can be formed by the intermediate plate.

  As the inserted portions 47 and 47a, by inserting both sides of a long and slender plate into a receiving portion configured in a shape provided with facing slits, the intermediate plate for the sheet pile member is fixed and held. The effect can be exhibited satisfactorily. In this embodiment, when the water shielding material is injected into the internal space of the connecting portion 44, the pipe member 26 is inserted first, so that the function of filling the water shielding material into the space can be easily performed. And it can be done reliably.

  In addition to the water-impervious wall described with reference to FIG. 8, as shown in FIG. 9, sheet pile members 51, 51 a.. There is also. In the embodiment shown in FIG. 9, for each connection portion of the sheet pile member 51..., A connection portion provided with a space filled with a water shielding material is formed on one side of the wall. A water-impervious material is filled in so that the water-impervious property can be satisfactorily exhibited. Each of the connecting members 52, 52 a, 52 b... Is provided with arc-shaped intermediate plates 55, 55 a... On both sides thereof, and both end portions of each said intermediate plate 55. Are fixedly attached with vertically elongated insertion portions 56... And inserted portions 57... Are arranged on both side portions of the connecting portion. Then, on both sides of the intermediate plate 55, the insertion portion is inserted into the insertion portion and fixed to form a connection portion 54, and each of the connection portions 54 ... is filled with a water shielding material. In addition, the water shielding performance can be exhibited well.

  In each of the water-impervious walls 40 and 50 described in FIGS. 8 and 9, in order to improve the efficiency of the work of filling the water-impervious material in the gap and to fill the water-impervious material without gaps, It is good to provide a pipe for drainage as explained in. A pipe is provided upright in the internal space surrounded by the intermediate plate, and the internal water and mud are discharged from the pipe 26, and a water shielding material is introduced from the upper part of the connecting portion. An operation is performed to form a water shielding layer so that the gap is not formed. Therefore, even if the connection portion formed in the connection portion of the sheet pile member has a relatively small cross-sectional area, or even if the fluidity of the water shielding material is not good, the connection portion It is possible to satisfactorily perform the filling operation of the water shielding material.

  In addition, when filling the water shielding material, injection of the water shielding material is performed by using a method of calculating the filling amount of the water shielding material with respect to the volume of the space formed between the intermediate plate and the sheet pile main city. The filled state can also be estimated by comparing the amount and the volume of the space. As described above, it is possible to easily confirm that the water shielding material is filled without any gaps, and it is possible to further improve the reliability of the work for forming the water shielding layer. In the example illustrated in FIG. 9, sheet pile members 51, 51 a... Having a substantially crank-shaped or L-shaped cross-section are driven into the seabed ground so as to be connected to each other via the connecting portions 52. This explains the construction of the impermeable wall 50.

  In addition to constructing a water shielding wall using the sheet piles, in recent years, a water shielding wall using a large-diameter steel pipe pile has also been constructed. In the example of the water shielding wall 60 illustrated in FIG. 10, an example is described in which large diameter steel pipe piles are erected in a row to construct a water shielding wall. The steel pipe piles 61, 61 a. The water shielding wall 60 is constructed so as to stand up sequentially. The steel pipe pile uses a pipe having a diameter of several meters. However, in the example shown in the present embodiment, a small diameter pipe 63 is used as a connecting member for the large diameter steel pipe piles 61, 61a. , 63a is fixedly attached to the side of the pile. Further, in order to fill the interior space of the connecting portion with the water shielding material and construct the water shielding layer, the connecting portions 66 and 65a are attached to the side portions of the connecting portion by the small-diameter pipe, and the connecting portion 66 is attached. There is also provided a connecting means for connecting and integrating them.

  In the example of the water-impervious wall 60 using the large-diameter steel pipe pile, the small-diameter pipes 63 and 64 are fixed to both side portions of the steel pipe pile 61 by means of welding or the like, respectively. Slits 63a, 64a,... Are provided at predetermined positions. When the connecting portion 62 is formed by combining the small-diameter pipes, as shown in the drawing, the small-diameter pipe is inserted into the slit provided in one small-diameter pipe so that the small-diameter pipe is opposed. Pipes can be combined with each other.

  Furthermore, in the side part of the connecting part 62, for each steel pipe pile 61, 61a, the joint plate 65, 65a is protruded and attached, and the connecting means provided at the end of the plate 65 ... are combined, A connecting member 66 is formed. As the connecting material provided on the intermediate plate, conventionally known connecting means such as a sheet pile connecting means can be provided, and a connecting part 62 in which small diameter pipes provided in the central part of the pipe body are combined with each other. At the same time, a space for filling the water shielding material is provided by combining the intermediate plates.

  Then, the interior of the space 68 defined by using the two connecting members 62 and 66 of the small-diameter pipe and the plate member is filled with a water shielding material 67 containing an arbitrary component, and both are integrated. Built as a water-impervious treatment section. Since the cross-sectional area of the connecting portion 68 is very large, it is very easy to construct a water shielding layer filled with a water shielding material. On the other hand, in the connecting portion 62 in which small diameter pipes are combined, as shown in the figure, it is necessary to inject a water shielding material into each of the three sections. Injection is required without creating a gap.

  By the way, in the connecting part 62 combined with the small diameter pipe, in order to combine the small diameter pipe, a slit is provided and the other small diameter pipe is passed through. , There is a concern that the water shielding material overflows from the gap of the slit. However, if a water shielding material with appropriately adjusted fluidity is used, the water inside the connection part is discharged from the slit while the water shielding material flows down and the amount of leakage is reduced, so that the gap is relatively easy. And can be filled with a water shielding material.

  In the example illustrated in FIG. 11, similarly to the example of the water shielding wall 60 using the steel pipe pile in FIG. 10, an arcuate plate member 65 </ b> A is formed on the side of the connecting portion 62 combined with a small diameter pipe. The partition means using is provided. Both end portions of the intermediate plate 65A are attached via connecting means provided on the steel pipe piles 61, 61a. By holding the intermediate plate 65A by the connecting means 66A, 66B, A connecting portion 68 having a large cross-sectional area is formed therebetween. In addition, a water shielding material is injected into the connecting portion 68 and the connecting member 62 combined with a small-diameter pipe is also filled with a water shielding material so that the water shielding at the connecting portion can be satisfactorily exhibited. I have to.

  The example shown in FIG. 11 is similar to the example of FIG. 3 described above, with respect to the impermeable wall constructed by arranging sheet piles, the impermeable wall is filled with the impermeable material at the connection portion between the sheet piles. An application example of an example constructed as follows is described. As described in FIG. 3, the sheet piles 31, 31a are placed adjacent to each other in a row, and the connecting members 34 provided at the end portions of the box-shaped steel sheet piles 31 are sequentially connected. It is something that has been constructed. In the example of the water-impervious wall 30 constructed as described above, the space part 35 connected by the connection members 34... As described above, the processing is as described above. By the way, also in the example shown in the said FIG. 10 and FIG. 11, when constructing the impermeable wall which can exhibit more reliability by filling the space of a connection part with the impermeable material, it is as follows as needed. It explains that the method described can be adopted.

  As described in FIGS. 8 to 11, when constructing the water shielding wall by placing steel sheet piles in a row, a water shielding material such as an asphalt mixture is applied to the connection portion of the steel sheet pile. An additional means of filling is used. In order to fill the interior space with the water shielding material, the auxiliary pipe 26 is provided upright so as to reach the lower part of the space portion, and the water shielding material falls due to the relatively small cross-sectional area of the space. Even in a difficult state, auxiliary means is provided for filling the water shielding material without gaps while naturally or forcibly removing water from the lower part of the injected water shielding material. As the auxiliary pipe 26, it is considered that a pipe having a diameter as large as possible should be used, but a pipe having an appropriate diameter is selected and used in accordance with the size of the space of the connecting portion.

  And, for the reason that the cross-sectional shape of the connecting portion 35 is narrow or the fluidity of the injected water-blocking material is insufficient, the water-blocking material 36 is not sufficiently packed in the connecting portion 35. It is possible to prevent the occurrence of a state with many gaps. That is, the filling operation can be easily performed by inserting the auxiliary pipe and using the means for injecting the water shielding material while draining. In addition, as an auxiliary pipe used in the said filling, the thing of arbitrary structures as demonstrated to the said FIGS. 4-6 can be applied in consideration of the conditions on the spot. By the way, when the above-mentioned problems cannot be solved, the muddy water remaining in the connection portion may be taken into the water shielding material and remain inside the space to be filled with the water shielding material. If there is a foreign substance, the water shielding effect at the connecting portion cannot be exhibited satisfactorily, and there is a concern that a water shielding layer having defects will be formed.

  In order to fill a steel sheet pile connection portion in the sheet pile wall with a water shielding material such as an asphalt mixture, a gap is not formed in the water shielding material using the means described in the above embodiments. It is possible to obtain good results by using an auxiliary pipe and using a water shielding material with improved fluidity even in a narrow space of the connection part because it can be filled in a clean state. Become. In each of the above embodiments, the means for closing the gap of the connecting portion of the steel sheet pile with the water shielding material is described. In addition, in the special box-shaped sheet pile 31 described in FIG. Filling the space 37 surrounded by the four sides (surroundings) by the member 32 and the intermediate plate member 33 to a height of 1 to 2 m from the sea bottom or a predetermined height. Such processing may be required.

  In the space portion 37 present in the middle portion of the sheet pile, before the steel sheet pile is placed, a treatment is performed to close the lower portion of the space, and in the space surrounded by the iron plate on all sides Water does not enter from the surroundings or the lower part (underground). On the other hand, in order to improve the durability and reliability of the impervious wall, the inside of the part buried in the ground is closed with an asphalt mixture or the like, that is, the inner space of the sheet pile wall is impervious to water. It seems that it is effective for the durability of the constructed impermeable walls to contain the materials and make them solid.

  In addition, when using a large-diameter pipe like the sheet pile shown in FIGS. 10 and 11, using a device like a hammer like a steel sheet pile of a normal shape, A construction method such as driving is not adopted, and means such as inserting the base of the large-diameter pipe into a groove dug into the sea floor using an excavator is used. And when a large-diameter pipe is used like the sheet piles shown in FIGS. 10 and 11, the lower part of the hole is often not closed when the pipe is erected. It is. Therefore, in particular, in order not to leave the lower part of the main body of the pipe as a void, asphalt mixture or the like is poured into the lower part at a predetermined thickness so that seawater does not enter the pipe. It is possible to cope by sealing the part.

  In order to inject the asphalt mixture into the gap portion 37, the mixture is allowed to flow down using a funnel positioned at the top of the space to be filled, and the mixture flowing down along the inner surface of the steel sheet of the sheet pile is So that it can be injected into the lower end of the part. In addition, as illustrated in FIG. 12, it is also conceivable to create a special elongate cylindrical bucket 38 and to store and handle a water shielding material in the bucket 38. In this example, the water shielding material accommodated in the bucket is lowered and inserted into the space 37 of the sheet pile, lowered to a position where the lower part of the bucket reaches the bottom of the hole, and then the valve is opened to discharge the mixture. Means can be used. Then, a method can be used in which the bucket is slowly raised while the valve 38a provided at the lower portion of the bucket is opened, so that the space is filled with the water shielding material without a gap.

  In the method for injecting a water shielding material described in FIG. 12, a valve 38a provided at the lower end portion of the bucket 38 is supported by suspending and supporting a bucket on a support member 39a of a cargo handling device such as a crane arm. Open the asphalt mixture so that it can be discharged. An operation wire 39b may be provided to open and close the valve 38a so that the crane operator can discharge the mixture. As a valve provided at the lower end portion of the bucket 38, a part of the end portion of the valve body plate is swingably supported by a support pin provided at the lower portion of the bucket body, and the other end is provided by an arbitrary locking means. The opening side of the part can be supported.

  Then, if the bucket containing the mixture (water shielding material) reaches the bottom of the hole and operates the operation wire 39b, the locking member is released and the valve is opened. When pulled up, the mixture inside flows down by its own weight. Therefore, as the bucket is pulled up, the water shielding material accommodated in the bucket 38 is filled in a state that fills the space created in the lower portion, and the inside of the sheet pile hole (inner space). It is possible to fill the water shielding material so as not to form a gap without containing water or earth and sand.

  In the example of the bucket described in FIG. 12, the bucket body that contains the asphalt mixture and is supplied from the lower part of the space portion is configured to have an arbitrary cross-sectional shape such as a square shape or a round shape. Can do. By the way, in the example to be filled with the water shielding material, the internal space of the steel sheet pile in FIG. 3 has a square cross section, so if a bucket with a round cross section is used therein, the bucket There will also be sufficient voids around. Further, the size of the bucket with respect to the space cross section into which the water shielding material is injected is not particularly limited. Furthermore, an auxiliary mechanism, such as forming the scale to be reduced so that the lower part of the bucket body is squeezed, and operating the crane so that it can be easily inserted into the space from the air, etc. Additional provisions can also be easily made as needed.

  Furthermore, regarding the valve provided at the lower end portion of the bucket, the end portion of the operation lever as the operation member may be provided so as to protrude from the lower end portion of the bucket without using the operation wire. And, when the bucket is inserted into the internal space of the sheet pile and the lower end reaches the bottom of the hole, the end of the operation lever comes into contact with the ground and the action of locking the valve is released. Good. By pulling up the bucket, the valve automatically opens, and as the bucket is raised, the water shielding material accommodated in the bucket is discharged.

  In order to supply the water shielding material to the internal space of the connecting portion in addition to the closed internal space of the sheet pile main body, the water shielding material is supplied using the bucket as illustrated in FIG. It is also possible to use it. For example, when it is desired to supply a water shielding material to a space portion having a narrow cross section with respect to the connection portion disclosed in each of the embodiments of FIGS. A special bucket may be constructed using this pipe and used for supplying the water shielding material. And if such specially thin buckets are used, fluidity is ensured with a water-impervious material such as asphalt mixture that is affected by outside air temperature, especially in the low water temperature of construction sites. In this state, it is possible to fill and fill the bottom of the hole.

  When constructing a water shielding layer by injecting a water shielding material to the space portion of the connecting portion of the steel sheet pile constructed by standing the steel sheet piles in a row, as described above, Using a method of constructing a layer of filling material by using a slender bucket that contains a water shielding material, discharging the water shielding material housed in the bucket from the lower part of the bucket and filling the connection space. Is considered a general publication. In addition, an empty bucket is inserted into the space of the connecting portion and lowered to a predetermined position, and a water blocking material is injected into the bucket in a state where water inside is excluded, and the bucket It is also possible to use a technique in which the bottom is opened, the water shielding material is discharged from the lower part of the opening, and the water shielding material is filled by pulling up the bucket to construct the water shielding layer.

  As described above, when a method of first inserting an empty bucket into the space portion of the connecting portion and removing water accumulated in the space is used, a valve provided at the bottom of the bucket is separately operated. A mechanism can be provided. And, when the empty bucket is lowered and inserted into the space portion of the connection portion of the steel sheet pile, the valve is closed so that water does not enter the bucket from below, and the water shielding material When injecting into the bucket, hold it, move it to the work place and place it at the position where the impermeable layer is constructed, open the valve and discharge the impermeable material to construct the impermeable layer To.

  In addition, when the sheet pile wall is configured using a large-diameter pipe, in order to prevent the lower part of the pipe from being left hollow when configured with a steel sheet pile as shown in FIGS. Is filled with a large amount of stone or concrete pieces, etc., in an increased state by mixing with a water shielding material. In addition, as the filler, rubble having a property that does not change even in a pipe over a long period of time can be used together with a water shielding material. For example, after putting crushed stone or concrete pieces, etc., into the lower part of the space of the large-diameter pipe up to a predetermined height, a water shielding material such as an asphalt mixture is injected, and a layer of the water shielding material is formed to an arbitrary height. It is possible to cope with this by using a method that is constructed.

  Furthermore, as the weight increasing material to be mixed with the water shielding material, it is preferable to use, for example, waste concrete that is generated when a building or the like is demolished as a low cost material. In addition, any material can be used as long as stability can be maintained with respect to the lower portion of the steel sheet pile made of a large-diameter pipe. And especially if there is no side effect, such as accelerating corrosion of steel sheet piles, it is also possible to construct a water shielding layer using a water shielding material with weak adhesion.

  Although it is also explained as the conventional example, when the construction environment is constructed, when the working environment is low in water temperature, in the space portion of the connection portion of the steel sheet pile, As with temperature, even if an asphalt mixture is cast, the water shielding layer may not be constructed in a good state. Therefore, when the working environment is too low, as shown in FIG. 5 or 6 above, hot water is injected from the ground to heat the inside of the connecting portion using pipes that are suspended in the connecting portion space. Perform the process. Then, with the temperature of the wall of the space for injecting the water shielding material being raised, the water shielding material heated to about 180 ° C., which is higher than the normal 160 ° C., is injected from above the connecting portion space. Thus, a means for forming a water shielding layer can be used.

  In addition, when a pretreatment is performed in which the temperature of the environment of the internal space is raised using a heating means, a method of heating the pump by circulating hot water may be used for the heating operation. There are two ways. And if the water etc. which remain | survived inside the space part are removed using the said pump after the heating operation | work, the water-impervious material injected after that is good in the favorable environment where impurities were reduced. Therefore, a water-impervious wall with high quality and improved reliability can be obtained. In addition, by injecting warm water etc. before injecting the water shielding material into the space, mud water containing a lot of impurities is replaced with water with less impurities, so impurities are mixed into the water shielding material. It will not be done.

  As a pretreatment for increasing the temperature of the connecting portion of the steel sheet pile, in addition to injecting the hot water or the like, a stage before injecting a water shielding material by installing a heater member in a pipe used for assisting the injection operation Thus, it is possible to perform a pretreatment in which the water accumulated inside is heated by the heater. By constructing the electric heater as the heater together with the pipe that holds it, and collecting it, it is possible to prevent the occurrence of inconveniences such as leaving excess in the water shielding material. .

It is explanatory drawing which shows the structure of a bank protection. It is another explanatory drawing which shows the structure of a revetment. It is explanatory drawing of the water shielding process in the connection part of a sheet pile. It is explanatory drawing of the auxiliary means of the water-shielding material injection | pouring in the connection part of a sheet pile. It is explanatory drawing of the revetment of the example different from FIG. It is explanatory drawing of the bank protection of another example different from FIG. It is explanatory drawing of the inconvenient state which arises at the time of injection | pouring of a water shielding material. It is explanatory drawing of the water-blocking process in the connection part of the sheet pile of the kind different from FIG. It is explanatory drawing of the connection part in an L-shaped sheet pile. It is explanatory drawing of a structure of the connection part of the sheet pile by a large diameter steel pipe. It is explanatory drawing of a structure of the connection part different from FIG. It is explanatory drawing of the operation | work which inject | pours a water shielding material using a bucket.

Explanation of symbols

1 submarine ground, 2 impermeable strata, 3 improved soil strata,
9 landfill, 10 partition revetment, 11 revetment main body, 12 caisson,
15 sheet pile wall, 20 sheet pile, 21 space inside sheet pile, 22 pipe,
25 Pump, 26 Auxiliary pipe, 30/40, 50 Impermeable wall,
31, 41, 51 Steel sheet pile, 32 Side plate member, 33 Middle plate member,
34 connection part, 35 connection part space, 36 water shielding material, 37 space part,
38 buckets, 39 cargo handling equipment, 61 steel pipe piles,
63/64 Small diameter pipe.

Claims (6)

In the management-type revetment that constructs a water-blocking wall along the coast or to divide any part of the sea, and uses the inside of the section surrounded by the water-blocking wall as a waste disposal site,
Connect the connection part provided at the end part of the steel sheet pile with the water shielding wall, and stand up in a row to construct the asphalt in the internal space of the connection part at both ends of the steel sheet pile of the water shielding wall Filled with a water shielding material using a mixture to ensure water shielding at the connecting part of the steel sheet pile of the water shielding wall,
By injecting the water shielding material from the upper part of the internal space of the connection part of the steel sheet pile, using a method of filling the water shielding material from the bottom of the internal space of the connection part upwards,
When filling the water shielding material in the internal space of the connection portion of the steel sheet pile, while preventing impurities such as water and mud in the internal space of the connection portion from being mixed, It is filled with a water shielding material,
In order to assist the injection of the water shielding material in the internal space of the connection portion of the steel sheet pile, a lower end portion is opened and a pipe having a hole in the side wall portion is erected in the internal space of the connection portion. And
When the water shielding material is injected from the upper part of the internal space of the connection portion of the steel sheet pile and the water shielding material is filled into the internal space of the connection portion, the water shielding material filled in the space portion. A method for constructing a water-impervious wall , wherein impurities such as water and mud remaining in the internal space are moved upwardly through the pipe and removed while being removed by the pressing action . In order to assist the injection of the water shielding material into the internal space of the connecting portion of the steel sheet pile, a hollow pipe with both upper and lower ends opened is arranged upright,
Impurities such as water from the lower part of the internal space of the connection part, and the upper part of the internal space through the pipe, depending on the space where the water in the lower part is pressurized by the water shielding material injected from the upper part of the connection part To discharge
The water-blocking layer is constructed so that impurities such as water and mud are not mixed in the water-blocking material filled so as to close the internal space of the connecting portion from above. To build a water barrier. When filling the space of the connection portion of the steel sheet pile with the water shielding material, the pipe used as an auxiliary means for filling work uses a circular, square or any other cross-sectional shape,
The water shielding layer is constructed by removing the pipe while pulling up the pipe at an arbitrary timing during the operation of injecting the water shielding material into the internal space of the connection portion of the steel sheet pile. The construction method of the impermeable wall of 1 or 2. When filling the water shielding material into the connection portion of the steel sheet pile, the pipe used as auxiliary means for filling work is circular, or using a square or any other cross-sectional shape,
3. The water shielding layer according to claim 1 , wherein when the performance of the water shielding layer is not affected, the water shielding layer is formed by leaving the pipe embedded in the water shielding material. How to build a wall. The connection portion of the steel sheet pile includes a connection portion configured to combine the connection members provided on both sides in the width direction of the steel sheet pile to be installed adjacent to each other,
A water-impervious layer in which the space portion of the connection portion is filled with the water-impervious material, and prevents water from leaking out of the section from the inside of the section partitioned by the revetment through the space. The construction method of the impermeable wall of claim | item 1. In the sheet pile wall constructed by standing the steel sheet pile, when the space cross-sectional area of the connection portion of the steel sheet pile is large, a large stone is put in the space cross section in advance and the space is filled so as to fill the space. The method for constructing a water shielding wall according to claim 1, wherein the water shielding material is filled to construct an integral water shielding layer .

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