JP4098186B2 - Housing mat and its use - Google Patents

Description

  The present invention relates to a frame mat excellent in economic efficiency, workability, durability, and the like that can be used for revetment or foundations for underwater or waterside structures. More specifically, the present invention relates to a frame mat that can be used for a large-scale construction in a short period of time by crane work and is extremely useful for reinforcing a coast, a river bank, an underwater structure, and the like, and its use.

  There are methods to make these parts concrete structures to prevent erosion due to waves on the shore and lake shores, and erosion due to water currents on river banks, but it is difficult to be economical and workable. For this reason, a method of laying an iron wire gabion filled with large stones is generally adopted, but the durability is poor and it cannot be said that the workability is excellent for construction in a wide range. In particular, when it is desired to perform construction in a place where it is submerged at high tide at the beach, a construction method capable of performing a wide range of work within a short time is required, but this is not possible with construction using iron wire gabions.

  Therefore, the object of the present invention is to store large quantities of fillers such as large stones useful for revetment, foundation reinforcement of underwater structures, etc., and have the strength that can be lifted by crane work, workability and durability It is in providing the frame mat excellent in the above. Another object of the present invention is to provide a method for safely filling a filler such as a large stone with good workability without substantially impairing the shape of the housing mat. Still another object of the present invention is to provide a method for laying the frame mat filled with large stones or the like safely and in a short time at a predetermined location.

  The present invention comprises two wide elongated mesh sheets that form opposing surfaces, and two narrow elongated mesh sheets that form opposing surfaces and are shorter than the wide elongated mesh sheets. The inside of the flat rectangular tubular structure formed by joining the sides in the width direction so that both ends of the wide elongated mesh sheet are left behind is partitioned at predetermined intervals by the partition mesh sheet, and a plurality of A plastic casing mat forming a small chamber to be connected, each mesh sheet is composed of a longitudinal mesh with a pitch of 25 cm or less which is a stretched thin portion and a lateral mesh of an unstretched thick portion, The small chamber is formed by curving the end mesh of the partition mesh sheet and inserting it between the meshes of the wide elongated mesh sheet, and connecting the support rod through the resulting cylindrical space, thereby connecting the wide elongated mesh mesh. Every 2-4 pitches in the longitudinal direction of the sheet The two opposite wide elongated mesh sheets are formed on both ends of the cylindrical space formed by bending one end mesh and inserting it between the other end meshes. It is related with the frame mat characterized by being connected.

  In order to secure the storage stability when the above-mentioned frame mat is filled with large stones and lifted with a crane, the suspension mat and the wide and long mesh sheet are connected in the case of one-side suspension. All parts should be provided in the vicinity of the upstream side of the horizontal mesh when viewed from one end that is the lifting end of the wide long mesh sheet, or in the case of both side lifting, the wide long mesh sheet As viewed from one end, it is preferably provided in the vicinity of the upstream side of the horizontal network up to the vicinity of the center, and thereafter provided in the vicinity of the downstream side of the horizontal network.

  In the above-mentioned case mat, in order to prevent swelling and breakage of the connecting portion due to the filler, the combination of the wide long mesh sheet and the narrow long mesh sheet is made by aligning the pitch of each longitudinal mesh, It is preferable to carry out a long thick string so as to form a knot at the contact part of the horizontal mesh part at least at intervals of 7 cm or less, and further, a polyethylene subjected to weathering prescription as a thick string It is preferable to use a string.

  The mesh sheet constituting the casing mat of the present invention is preferably a plastic perforated film, particularly a uniaxially stretched sheet of polyolefin perforated sheet, and in particular, a random copolymer of propylene and other α-olefins. A uniaxially stretched sheet is preferably a perforated sheet. In addition, it is preferable to use those having a tensile strength of 50 kN / m or more as the wide elongated mesh sheet and the narrow elongated mesh sheet, respectively.

As the cage body mat, it is preferable volume of the small chamber is 0.1-0.5 M ^3, also preferably their number is in the range of 4 to 40, also the overall length is about 2~20m .

  Moreover, it is preferable that the end part of a wide long mesh-like sheet | seat is comprised by the longitudinal direction mesh of 2-4 pitches.

  The above-mentioned frame mat is in a state where only one side is in an uncoupled state among four coupled sides of two opposed wide elongated mesh sheets and two opposed narrow elongated mesh sheets, and one narrow elongated mesh Carried to the construction site with the mesh sheet surface open or assembled at the construction site, where it is filled with a solid filler such as large stones, and then the unbonded portion is joined with a long thick string, and the housing mat of the present invention Is preferably completed. The filling of the solid filler is preferably carried out by standing the casing mat upright so that the narrow-width net-like sheet surface in the open state of the casing mat is at the top, with support walls on both sides of the casing mat. It is preferable to provide it.

  The frame mat filled with the solid filler as described above is preferably used for revetment work or for an underwater structure foundation. Laying the frame mat is performed by inserting a support rod into one end joint portion of the two wide elongated mesh sheets in the frame mat and lifting the one side bond portion, or by two sheets in the frame mat. It is preferable to carry out by inserting a support rod into the both-side end joint portion of the wide long mesh sheet and lifting the both-end joint portion.

  ADVANTAGE OF THE INVENTION According to this invention, the solid mat | matte, such as a large stone, can be accommodated in large quantities, and the frame mat which can be laid down in large scale and for a short time by the operation | work by heavy machines like a crane can be provided. A frame mat containing such a solid filler can flexibly follow various ground shapes, and can be easily laid and fixed even on steep slopes, for example. In addition, it has excellent water permeability and breathability, but also has excellent water pressure stability, corrosion resistance, weather resistance, etc., so it can be used in the sea, lakes, rivers, etc. It can be used as a durable reinforcing structure on the waterside or a structure for emergency repair. Of course, it can also be used for reinforcement of a general site. More specifically, it is used to prevent river and coastal erosion, scouring, sand beach stability foundations, breakwater and various embankment foundations, artificial reef foundations, canal lining, sewer score mats, soft ground reinforcement, etc. can do.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a mesh sheet 1 suitable for a wide and long mesh sheet, a narrow and long mesh sheet, and a partitioning mesh sheet constituting the casing mat of the present invention, and is a longitudinal direction that is a stretched thin-walled portion. It consists of a mesh 2 and a transverse mesh 3 which is an unstretched thick part. Such a mesh sheet 1 can be obtained by uniaxially stretching a thick perforated sheet in the longitudinal direction. That is, a part of the perforated sheet that forms the side of the hole is stretched to form a longitudinal network 2 in which the central part is narrowed, and the other part is not substantially stretched and the thickness of the original sheet is increased. A horizontal mesh 3 is formed by being maintained. In the wide long mesh sheet and the narrow long mesh sheet, the longitudinal direction of the mesh sheet 1 is used so that these longitudinal directions coincide with each other, and in the partitioning mesh sheet, the opposing wide long sheet is used. It is used such that the direction toward the mesh sheet surface is the longitudinal direction of the mesh sheet 1.

Although various plastic materials can be used as the mesh sheet material, polyolefins such as polyethylene and polypropylene are preferable in consideration of weather resistance, water resistance, salt water resistance, strength, and the like. As the polyethylene, high density polyethylene having a density of 940 kg / m ³ or more is particularly preferable, and as the polypropylene, a propylene homopolymer and a random copolymer of propylene and another α-olefin are preferable. In particular, in order to fill a large amount of a high-weight solid filler and to be able to use it even in cold regions, propylene and other α-olefins of 20 mol% or less, preferably 0.1 to 10 mol% are preferred. It is preferable to use a random copolymer. That is, such a random copolymer has a high tensile strength per unit weight and also exhibits a sufficient strength even in a cold region where the outside air temperature decreases in winter. When polyethylene is used as the material, it is preferable to use a material having a melt flow rate at 190 ° C. and a load of 2160 g of 0.1 to 4.0 g / 10 min. When using polypropylene, It is preferable to use one having a melt flow rate at 230 ° C. and a load of 2160 g of 0.1 to 4.0 g / 10 min. In order to improve weather resistance, these polyolefins are preferably blended with one or more of antioxidants, ultraviolet absorbers, light stabilizers, etc., especially carbon black.

  Although the width varies depending on the size of the housing mat, the wide and long reticulated mesh sheet also has a longitudinal tensile strength of 50 kN / m or more, preferably 60 kN / m or more, more preferably 70 kN. / M or more is preferably used. Further, if the longitudinal mesh pitch (lateral mesh pitch) X in FIG. 1 is too long, it is liable to swell laterally when filled with large stones, which may impair the flatness of the housing mat. It is preferably 25 cm or less, preferably about 15 to 20 cm. The thinnest part of the longitudinal mesh is preferably at least 3 mm wide, preferably 5-10 mm, and at least 0.3 mm thick, preferably 0.5-1.5 mm. The pitch Y between the longitudinal meshes is preferably about 10 to 30 mm.

  FIG. 3 is a schematic view showing an example of the housing mat 4 of the present invention, and FIG. 4 is a drawing in which the upper wide wide mesh sheet portion of the housing mat of FIG. 3 is removed. 3 and 4, the frame mat 4 is composed of two wide and long mesh sheets 5a and 5b that form the upper and lower surfaces and two narrow and long mesh sheets 6a and 6b that form both sides. The inside of the formed flat rectangular tubular structure is partitioned into a large number of small rooms by the partition mesh sheet 7. The upper and lower wide and long mesh sheets 5a and 5b are longer than the narrow and long mesh sheets 6a and 6b on both sides, and both are respectively left so that both ends 8a and 8b of the wide and long mesh sheets 5a and 5b are left over. Both ends 8a and 8b are connected to each other at their ends to maintain the strength of the housing mat 4, and a support rod insertion portion is formed when lifted.

  If the width of the wide long mesh sheet 5 is too short, the efficiency of the laying work of the frame mat is poor, but if it is too long, the filling work of large stones, the lifting work with a crane, etc. should be performed smoothly. Therefore, a range of about 1 to 1.5 m is preferable. The length is appropriately selected according to the strength of the mesh sheet and the laying work, but usually about 2 to 20 m, preferably about 3 to 15 m is used. In addition, the width of the narrow long mesh sheet 5 is the laying thickness of the frame mat, and is usually about 20 to 50 cm.

  FIG. 5 is a side sectional view showing a connecting portion between the wide and long mesh sheet 5 and the partitioning mesh sheet 7, and FIG. 6 is a plan view thereof. All the longitudinal meshes 23 in the vicinity of the lateral mesh 33 at the upper end of the partition mesh sheet 7 are curved and inserted so as to protrude upwardly between the longitudinal meshes 21 of the upper wide elongated mesh sheet 5a. By inserting the support rod 9a into the cylindrical space formed between the longitudinal mesh 23 of the network mesh sheet 7 and the longitudinal mesh 21 of the wide elongated mesh sheet 5a, the upper part and the upper part of the partitioning mesh sheet 7 Bonding of the wide and long mesh sheet 5a is achieved. In order to fix the inserted support bar 9a, it is preferable that the longitudinal mesh 21 of the upper wide long mesh sheet 5a and the support bar 9a are coupled at several points by belt fastening or the like. Similarly, all the longitudinal meshes 23 in the vicinity of the lateral mesh 33 at the lower end of the partition mesh sheet 7 are bent and inserted so as to protrude downward between the longitudinal meshes 21 of the lower wide elongated mesh sheet 5b. By inserting the support rod 9b into the cylindrical space formed between the longitudinal mesh 23 of the partition mesh sheet 7 and the longitudinal mesh 21 of the wide elongated mesh sheet 5b, the lower part and the lower part of the partition mesh sheet 7 are formed. Bonding of the wide and long mesh sheet 5b is achieved.

  In FIG. 4, these partitioning mesh sheets 7 used for providing a small room are provided at every three pitches of the longitudinal mesh 21 of the wide and long mesh sheet 5, but 2 or 2 as desired. It may be every 4 pitches. However, it is not preferable to provide a further gap than this, because when the large stone is filled, the swelling on the surface of the wide and long mesh sheet 5 becomes too large.

  FIG. 9A is a plan view showing a connecting portion between the wide elongated mesh sheet 5 and the narrow elongated mesh sheet 6, and FIG. 9B is a rear view. The wide elongated mesh sheet 5 and the narrow elongated mesh sheet 6 are arranged so that the longitudinal meshes 22 of the respective longitudinal meshes 21 are aligned, and the longitudinal meshes 21 and 22 are formed by the long thick string 10. These abutting portions are joined while forming the winding portion 11 and forming the knots 12 at the contact portions of the lateral meshes 31 and 32. 9 (A) and 9 (B), the wide and long mesh sheet 5 and the narrow and long mesh sheet 6 are combined to be on the same plane. It is bent and assembled so that both are perpendicular to each other. The knot 12 is not limited to that shown in FIG. 9 as long as the two sheets do not move relative to each other. By forming a firm knot, a strong connection between the two sheets can be achieved even in the wound part 11. However, if the distance between the winding portions 11 is increased, the weakly bonded portion between the two sheets is lengthened, and there is a possibility that the portion is torn when filled with a large stone or the like. The pitch between 11 and the distance between the winding part 11 and the knot 12 are 7 cm or less, preferably 4 to 6 cm.

As such a thick string, those made of natural fibers or synthetic fibers can be widely used, but in consideration of weather resistance, water resistance, salt water resistance, strength, etc., they are made of polyolefin, for example, polyethylene or polypropylene. Those are preferred. As the polyethylene, high density polyethylene having a density of 940 kg / m ³ or more is particularly preferable, and as the polypropylene, a propylene homopolymer and a random copolymer of propylene and another α-olefin are preferable. Particularly suitable thick cords are made of drawn yarns of polyethylene, particularly high-density polyethylene, which has been subjected to a weather-resistant formulation in which one or more of antioxidants, ultraviolet absorbers, light stabilizers, etc., especially carbon black is blended. is there. For example, a twisted yarn obtained by stretching a multifilament of high-density polyethylene and having a diameter of about 4 to 8 mm is preferably used.

  The casing mat of the present invention is preferably formed as follows. That is, the narrow long mesh sheets 6a and 6b are formed on both side surfaces of the wide long mesh sheet 5b forming the lower surface, and the both ends of the wide long mesh sheet 5b are left by the thick string 10 as described above. To join. Next, the lower end of the partition mesh sheet 7 and the bottom wide wide mesh sheet 5b are joined every 2 to 4 pitches of the longitudinal mesh 21 of the bottom wide mesh sheet 5b in the longitudinal direction by the above-described coupling method. Will continue to join. Thereafter, the upper end of the partition mesh sheet 7 and the upper wide wide mesh sheet 5a are joined by the joining method as described above. In this case, the joining end of the partition mesh sheet 7 and the wide and long mesh sheets 5a and 5b on the upper surface and the lower surface of the partition mesh sheet 7 is filled with large stones and is lifted by the partition mesh sheet 7 in the housing mat. In order to prevent it from slipping off, it is preferable that it is located in the vicinity of the upstream side of the lateral mesh 31 of the wide and long mesh sheets 5a and 5b as viewed from the lifting end. In other words, when used for one-side suspension, it is preferable that all of the coupling ends are located in the vicinity of the upstream side of the lateral mesh 31 when viewed from one end which is the lifting end of the wide elongated mesh sheet 5. When used for both-side suspension, when viewed from one end of the wide elongated mesh sheet 5, all of the connecting ends are located near the upstream side of the lateral mesh 31 up to the vicinity of the central portion, and thereafter all the lateral ends are laterally oriented. It is preferable to be in the vicinity of the downstream side of the mesh 31. The partitioning mesh-like sheets 7 at both ends of the wide and long mesh-like sheet 5 form the outer wall portion of the housing mat 4.

  After the partition mesh sheet 7 is joined to the upper and lower wide and long mesh sheets 5a and 5b, the upper end of the narrow and long mesh sheet 6a on one side and the upper wide and long mesh sheet 5a are as described above. The two ends 8a and 8b of the upper and lower wide and long mesh sheets 5a and 5b are connected to each other while being connected with a thick string by a method. FIG. 2 shows a coupling method of both end portions 8a and 8b of the wide and long mesh sheets 5a and 5b. This joining method is essentially the same as the joining method of the partition mesh sheet 7 and the upper and lower wide elongated mesh sheets 5, and the end mesh of either the upper or lower wide elongated mesh sheet is curved. The other wide wide mesh sheet may be inserted between the end meshes. In FIG. 2, the longitudinal mesh 24 at the end 8a of the upper wide elongated mesh sheet 5a is curved, and the mesh is inserted between the end meshes 8b of the lower wide elongated mesh sheet 5b. The support rod 12 is penetrated and connected to the cylindrical space generated between the two. The support rod 12 is preferably a flat one, and considering the lifting stability, it is preferable that the support rods are coupled so that the support rod comes on the center line of the housing mat. Furthermore, the lengths of the end meshes 8a and 8b of the wide and long mesh sheet 5 may be determined in consideration of lifting workability, and usually only about 2 to 4 pitches in the longitudinal mesh.

  By the above-described coupling operation, it is possible to create a housing mat having a large number of connected small chambers in which only one narrow elongated mesh sheet 7 is opened. By providing the opening in this portion, it is possible to fill the casing mat with a solid filler such as a large stone with high work efficiency by the method described later. Such a frame mat may be assembled at the work site, or may be assembled in advance at another place and brought into the work site.

  In order to fill a solid mat such as a large stone as a reinforcing material into a casing mat in which only one narrow and long mesh-like sheet 7 is opened, the above-mentioned casing mat has an opening at the top. If a solid filler is introduced from above by a shovel car, a large amount of solid filler can be efficiently filled in a short time. In order to stably perform the filling operation so as not to cause the bulging of the casing mat, as shown in FIGS. 7 and 8, on both sides of the wide and long net-like body surfaces 5a and 5b of the standing casing mat. It is preferable that the support walls 13a and 13b are erected and the uprightness of the housing mat is maintained. That is, as shown in FIG. 7, the casing mat is erected so that the surface of the wide and long mesh sheet 5a, which is the opening surface, comes into contact with the wall 13a so that the surface of the narrow and long mesh sheet 6a is on the upper surface. Next, as shown in FIG. 8, another wall body 13b is placed so as to abut against the surface of the other wide and long mesh-like sheet 5b, and the casing mat is sandwiched between the wall bodies 13a and 13b. After that, if the solid filler is filled into the housing mat from the opening by the shovel car, the wall can prevent the wide and long mesh-like sheets 5a and 5b from being swelled by the solid filler. It is possible to obtain a solid filler housing case mat having the following. Further, during or after the filling of the solid filler by the shovel car, the uniform filling of the solid filler in the housing mat can be carried out manually at any time, so that uniform and quick filling can be performed.

The solid filler to be filled in the casing mat is preferably a bulky filler having a size that does not come out of the mesh of the casing mat and having a volume of about ³⁰ to 200 cm ³ that can be uniformly filled in the casing mat. In order to maintain the effects of revetment and reinforcement over a long period of time, it is preferable that they are not easily eroded by waves and water currents, and large stones such as natural stones and crushed stones that can be obtained on riverbanks and coasts can be obtained at low cost. So most preferred.

  After filling the body mat with a solid filler such as large stones, the narrow and long mesh sheet 6b and the wide and long mesh sheet 5a of the opening surface are connected by the thick string as described above, thereby revetment. Alternatively, a solid-filled enclosure mat used for foundations for underwater structures and the like can be obtained.

  The solid-filled enclosure mat thus obtained is then suspended at one end or both ends by a crane, carried to a predetermined location, and laid. In this case, a normal crane vehicle can be used, but the shovel car used for filling the solid filler into the housing mat can also be used for this crane operation. When lifting the housing mat, if a lifting support rod slightly longer than the end support rod 12 is inserted into the cylindrical space at the end of the housing mat, a wire or rope is hung at both ends. Good. FIG. 10 is a drawing in which one end of the frame mat 4 containing the solid filler is lifted and laid on the beach. The frame mat 4 is moved to the construction site on the coast by lifting the rope 20 hung on the lifting support rod 14 inserted at the end of the frame mat by the shovel 17 at the tip of the crane 16 of the shovel car 15. It is laid so as to cover the beach shore 19 and the slope 18.

  FIG. 11 is a drawing in which both ends of the frame mat 4 containing the solid filler are lifted and moved by a crane vehicle 24 and laid on a flat ground like a foundation of an underwater structure. The frame mat 4 is hung by supporting the center portion of the rope 20 hung on the lifting support rods 14 inserted at both ends thereof by the hooks 21a and 21b provided at both end portions of the long support rod 23. The central portion of the wire 22 connecting the both ends of the rod 23 is lifted by a wire rope 26 extending from the tip of the crane 25 of the crane vehicle 24, moved to a predetermined position, and laid.

It is drawing which shows the net-like sheet | seat which can be used for the housing mat of this invention. It is drawing which shows the coupling | bonding system of the both ends of a wide elongate mesh sheet. It is the schematic of the housing mat of this invention. FIG. 4 is a diagram in which an upper surface of the housing mat in FIG. 3 is removed. It is sectional drawing which shows the coupling | bond part of a wide elongate mesh sheet and the mesh sheet for a partition. It is a top view which shows the coupling | bond part of a wide elongate mesh-like sheet | seat and the mesh-like sheet | seat for a partition. It is the figure which made the frame mat which opened one side upright along the support wall. It is a drawing in which a frame mat having an opening on one side is sandwiched between support walls to stand upright. It is drawing which shows the coupling | bond part of a wide elongate mesh sheet and a narrow elongate mesh sheet. It is drawing which lifts one side of the frame mat which stored the solid filler, and lays it on the shore. It is drawing which lifts both sides of the frame mat which stored the solid filler, and lays it on a flat ground.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reticulated sheet 2 Longitudinal reticulated mesh 3 Lateral reticulated mesh 4 Frame mat 5 Wide long reticulated reticulated sheet 6 Narrow reciprocal reticulated reticulated sheet 7 Partition reticulated reticulated sheet 9 Support rod 10 Thick string 11 Winding part 12 Knot 13 Support wall

Claims (24)

Two wide elongated mesh sheets that form opposing surfaces, and two narrow elongated mesh sheets that form opposing surfaces and are shorter than the wide elongated mesh sheets, A plurality of small chambers in which the inside of the flat rectangular tubular structure formed by joining the sides in the width direction so as to leave both ends of the sheet is partitioned by a partitioning mesh sheet at a predetermined interval Each of the mesh sheets is composed of a stretched thin portion of a longitudinal mesh having a pitch of 25 cm or less and a transverse mesh of an unstretched thick portion, The end of the wide mesh sheet is curved and inserted between the meshes of the wide and long mesh sheet, and the longitudinal length of the wide and long mesh sheet is connected to the resulting cylindrical space through the support rod. Direction mesh is formed every 2-4 pitches And both end portions of the two opposed wide and long mesh sheets are connected through a support bar in a cylindrical space formed by bending one end mesh and inserting between the other end meshes. A mat body characterized by 2. The bag according to claim 1 , wherein the connecting portion between the partitioning mesh sheet and the wide and long mesh sheet is in the vicinity of the upstream side of the lateral mesh when viewed from one end of the wide and long mesh sheet. Body mat. The connecting portion of the partition mesh sheet and the wide elongated mesh sheet is in the vicinity of the upstream side of the lateral mesh up to the center portion when viewed from one end of the wide elongated mesh sheet, and thereafter the lateral direction. The casing mat according to claim 1 , wherein the casing mat is in the vicinity of the downstream side of the mesh. The combination of the wide long mesh sheet and the narrow long mesh sheet is aligned with the pitch of the respective longitudinal mesh, and has winding portions at an interval of at least 7 cm, and at the contact portion of the lateral mesh portion The casing mat according to any one of claims 1 to 3 , wherein the casing mat is connected with a long thick string so as to form a knot. The frame mat according to any one of claims 1 to 4, wherein the tensile strength of each of the wide elongated mesh sheet and the narrow elongated mesh sheet is 50 kN / m or more. The casing mat according to claim 4 or 5 , wherein the thick string used for bonding the wide long mesh sheet and the narrow long mesh sheet is a polyethylene string subjected to weathering prescription. The casing mat according to any one of claims 1 to 6 , wherein the small chamber volume is 0.1 to 0.5 m ³ . The housing mat according to any one of claims 1 to 7, wherein the number of small rooms is 4 to 40. The casing mat according to any one of claims 1 to 8 , wherein the total length is 2 to 20 m. The casing mat according to any one of claims 1 to 9, wherein the end portion of the wide and long mesh-like sheet is composed of 2 to 4 pitch longitudinal meshes. The casing mat according to any one of claims 1 to 10 , wherein each mesh sheet is a uniaxially stretched sheet made of a plastic perforated sheet. The casing mat according to claim 11 , wherein the plastic is polyolefin. The casing mat according to claim 12 , wherein the polyolefin is a random copolymer of propylene and another α-olefin. The casing mat according to any one of claims 1 to 13 , which is used for packing a solid filler. The housing mat according to claim 14 , wherein the solid filler is a large stone. The frame mat according to any one of claims 1 to 15 , which is used for revetment work or for a structure foundation. The casing mat according to claim 14 or 16 , wherein each small chamber is filled with a solid filler. The housing mat according to claim 15 or 16 , wherein each small room is filled with large stones. Only one side out of the four coupled sides of two opposing wide elongated mesh sheets and two opposing narrow elongated mesh sheets is in an uncoupled state, and one narrow elongated mesh sheet surface is opened. The casing mat according to any one of claims 1 to 16 , which is in a state. 20. The housing mat is erected so that the combined width narrow elongated mesh sheet surface in the opened state of the chassis mat is the upper surface, and a solid filler is introduced from above, and then the upper narrow mesh sheet and the wide A solid filler filling method characterized in that unbonded portions of a long mesh sheet are joined with a thick string. The solid filler filling method according to claim 20 , wherein the solid filler is a large stone. The solid filler filling method according to claim 20 or 21 , wherein support walls are provided on both sides of the upright housing mat. A support rod is placed at one end joining portion of two wide elongated mesh sheets in the housing mat according to claim 17 or 18, and the housing mat is laid by lifting the one joining portion. How to lay body mats. A support rod is inserted into both side end joint portions of the two wide long mesh sheets in the housing mat according to claim 17 or 18, and the housing mat is laid by lifting the both side end joint portions. How to lay the frame mat.

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