KR20200083391A - Structure of the velcro fastener device - Google Patents

Abstract

A structure for a movable free wing part of T-shaped Velcro for an integral sheet of the present invention can freely perform position selection for attachment and detachment of the movable free wing part of the T-shaped Velcro on non-woven fabric of the integral sheet with respect to the entire overbreak and curved surface (S), thereby optimizing overlapping and separating adjustment of an overlapping portion of the integral sheets (1500) through the overall response and adjustment with respect to the entire overbreak and curved surface (S) over the entire section from I, II, III to IV from a peak crown and allowing a separated distance to be gradually minimized by a method from temporary fixing to adhesive fixing through the local response and adjustment for each section.

Description

Structure of the velcro fastener device for the integrated seats

The present invention relates to a structure of a T-type velcro movable free wing for an integral sheet, and the attachment position selection of the T-type velcro movable free wing to the nonwoven fabric of the integral sheet with respect to the whole of the excavation and the curved surface (S) is free, thereby making it possible The overlapping and spacing adjustment of the overlapping part of the ``integrated sheet 1000'' is optimized through the ``overall correspondence and adjustment'' for the entire excavation and the curved surface S across the entire area from I to II to III to IV from the secondary crown. At the same time, it is an invention in which the excitation distance is gradually minimized by the ``temporary fixation→adherence fixation'' method through ``local response and adjustment'' for each area.

"Overall response and adjustment" is made by provisional self-support structure (J) (J1) (J2), and "local response and adjustment" is self-support support axis structure (K, K1, K2) and "temporary fixation→ It is an invention that is exerted through the "adhesive fixing" method.

In more detail, in the order of the erection of self-supporting structures (J)(J1)(J2) installed in the order of Ⅰ→Ⅱ→Ⅲ, the O points on the XY axis of the Ⅰ area with respect to the origin O, O1, O2 of each area By symmetrically, each of the four directional movement wing length portions 1340 is tableted, and then only one directional movement wing length portion 1340 is tabletted to the origins O1 and O2 of the II and III regions, thereby excavating and bending surfaces. With respect to (S), optimization of overlapping and separation adjustment of overlapping portions is made easy by "overall coordination and adjustment".

In this way, overlapping and spacing adjustment of overlap is made through "overall response and adjustment", and minimization of the excitation distance through "local response and adjustment" is due to close and tableting of the length display portion 1342. The medium of this function is a T-type Velcro movable free wing structure having a length indicator 1342.

The velcro attachment portion 1320 of the T-type velcro movable free wing portion 1300 is free to select the attachment location anywhere on the nonwoven fabric 1520 of the integral sheet, and is described as "temporary fixation → close adhesion to the excavation and bending surface S". Since the minimization of the adhesion and fixation of the length display portion 1342 is easy by the "fixed" method, "overall response and adjustment" and "local response and adjustment" are also possible and free useful inventions.

In the waterproofing of the NATM method, an integral sheet or a detachable sheet is an essential member as a waterproof member. Since the NATM method is a method of blasting, the excavation surface is irregular, and the shotcrete surface formed for the protection of the blasting excavation surface is also inevitably formed by excavations and long curved surfaces. Shotcrete pour is a method of spraying with high pressure, so it is not sophisticated and has rough and long curved surfaces, resulting in a rough surface.

As in the NATM method, as shown in FIG. 1A, "Tunnel ground (10) blasting → Tunnel surface irregularity → Shotcrete (20) pouring → Waterproof sheet (R) [Non-woven fabric (40) + PE sheet (50)] laying → Lining concrete (30 ). Ground groundwater penetrates the shotcrete surface 20 where the tissue is not dense. The waterproof sheet (R) (nonwoven fabric 40 + PE sheet 50) is intended to block this. The location of the waterproof sheet R is laid between the shotcrete 20 and the lining concrete 30.

According to Figure 1a, the most vulnerable place in the NATM method is a waterproof sheet (R) (non-woven fabric 40 + PE sheet 50). PE sheet 50 is a very weak member compared to shotcrete 20 or lining concrete 30.

Lining concrete 30 is placed against the PE sheet 50 of the waterproof sheet R laid on the surface of the shotcrete 20. At this time, the poured lining concrete 30 is a structural material integrated with the shotcrete 20.

Since the lining concrete 30 must be integrated with the shotcrete 20, the PE sheet 50 of the waterproof sheet R is also pressed against the lining concrete 30 to be in close contact with the shotcrete 20 surface. If the surface area of the PE sheet 50 in close contact with the area of the shotcrete 20 is the same, there is no shortage of the surface area, so the PE sheet 50 does not have tensile stress. PE sheet 50 is not torn because tensile stress is not applied.

However, when the surface area of the adhered PE sheet 50 is smaller than the surface area of the shotcrete 20 to be adhered to, it becomes insufficient and pushed by the lining concrete 30 while being stretched by the surface area deficiency (ΔA) of the PE sheet 50 while being stretched. Tensile stress is largely applied to 50, and the connection of the most vulnerable PE sheet 50 does not overcome the large tensile stress and is torn from it while exceeding the limit of this force.

In order to prevent the surface area shortage (ΔA) of the PE sheet 50, the PE sheet 50 must be closely installed on the surface of the shotcrete 20. The close installation is only the "direct compression method" by the nail penetrating the PE sheet 50. Penetration of the nail to the PE sheet 50 has a problem that cannot achieve the purpose of waterproofing.

The method of installing the PE sheet 50 without penetrating the PE sheet 50 is the "indirect fixing medium (M) method".

The representative "conventional technology-1" (patent registration No. 10-0971878) of the "indirect fixing medium (M) method" is the installation method of the PE sheet 50 via the central wing portion 46 of FIGS. 1B and 1C. to be. The prior art-1 of Figs. 1B and 1C is a "integrated sheet 60 structure". "Integral sheet 60 structure" refers to a non-woven fabric 40 and PE sheet 50 are integrated by point fusion (52).

At this time, only the nail is compressed into the central wing 46 which is the medium, and the PE sheet 50 has no penetration of the nail at all.

Since the medium for attaching and fixing the PE sheet 50 to the surface of the shotcrete 20 is the central wing portion 46, the separation distance by the central wing portion 46 is inevitable.

In particular, a state in which the central wing portion 46 of the “integrated sheet 60 structure” is installed is illustrated in FIG. 1C.

Look at the problems of the prior art.

1) The prior art-1 of the "integrated sheet 60 structure" will be described.

According to FIG. 1C of the prior art-1, since the fixing of the PE sheet 50 to the shotcrete 20 is only the central wing portion 46, the center of the central blade portion 46 is convex in both sides with the center of the wing portion being the most. It sags a lot.

According to FIG. 1C, the fixing of the PE sheet 50 of the “integrated sheet 60 structure” to the shotcrete 20 is only the central wing portion 46, so that the center wing portion 46 is drooped in both convex shapes around the center. It is shaped. Since the central wing part 46 is fixed to the center, the separation distance of the PE sheet 50 does not form a constant horizontal plane and sags downward. According to FIG. 1C of the prior art-1, the deflection δ of the central portion of the PE sheet 50 is maximized by fixing two adjacent central wing portions 46. The maximum deflection δ in the center of the PE sheet 50 is the maximum separation distance (δmax) of the medium. The maximum separation distance (δmax) due to the central wing portion 46 is a problem of the prior art-1 of the “integrated sheet 60 structure” of FIGS. 1B and 1C. The surface area of the PE sheet 50, which is in close contact with the maximum distance (δmax) due to the central wing portion 46, is smaller than the surface area of the shotcrete 20 to be in close contact with the lining concrete 30 due to the lack of surface area (ΔA). Together, the tensile stress as large as the surface area deficiency (ΔA) is applied to the PE sheet 50, and there is a problem that it is torn from the connection portion of the most vulnerable PE sheet 50.

2) Let's take a look at the prior art-2 of the "separation sheet structure".

Prior Art-2 (Patent Registration No. 10-0971878) is shown in FIGS. 1D, 1E, and 1F as a “separable sheet 60 structure”. Unlike the "integrated sheet structure", the nonwoven fabric 40 and the PE sheet 50 are "separated sheet structure" from each other. As shown in Figure 1f, the wing fixture 72 is heat-sealed (56) to the PE sheet (50).

Looking at the problem of the "separation sheet structure" of the prior art-2 is as follows.

First, the "separated sheet structure", unlike the one-piece integrated sheet 60, is a two-time installation work, so the installation work is an inefficient and inefficient problem. The separated sheet 60 of the "separated structure" is a non-woven fabric ( 40) is installed on the shotcrete surface 20, and then the PE sheet 50 is laid thereon by compression of the wing fixture 72.

Second, the PE wing fastener 72 of the “separated sheet structure” is a hard material that is inflexible compared to the fabric, and therefore, the problem of insufficient adaptation of the separation distance to “local response/adjustment” of the excavation and long curved surfaces is a problem. . When the separation distance is increased, the separation distance is increased, and there is a problem that it is torn from the overlap connecting portion of the PE sheet 50 due to the large tensile stress pressed to the PE sheet 50 by the pressure of the lining concrete 30.

Third, there is a problem in that the heat fusion point is deteriorated and carbonized because it is a heat fusion bonding method of the wing fixture 72 on the PE sheet 50. Due to the deterioration and carbonization, the thickness of the PE sheet 50 becomes thin, and the tensile strength is not only weak, but when the wing fixture 72 is pulled hard, the heat fusion and carbonization part is separated and torn.

Fourth, the PE sheet 50 of the prior art-2 is installed and fixed on the entire length of the arch direction (for example, 25m). At this time, the entire length is moved and adjusted left and right. We will refer to the overall shifting/adjustment as “total response/adjustment”. The adjustment to the local roughness or the curved surface will be referred to as "local response and adjustment".

Normally, the PE sheet 50 is laid down from the top end to the left and right.

"Overall correspondence and adjustment" is achieved by pulling the wing fixture 72.

In order to move/adjust the entire length of 25m in the arch direction by pulling the wing fixture 72, it is difficult to adjust the movement with the heat-sealing force of the wing fixture 72. This is because the deteriorated heat-sealing power, which has become thinner, is weak. It is suitable for "local response/adjustment" as the heat-sealed power deteriorated to this extent.

Fifth, in laying the entire length of the PE sheet 50 in the arch direction (that is, 25 m) as a unit, the connection distance of the overlapping portion of the PE sheet 50 increases as it goes down from the top end, due to thermal welding of the overlapping portion. There is a problem that the joint connection becomes difficult. This is a typical problem of "local response and coordination."

Sixth, since the wing fixture 72 is a fixed point heat-sealed to the PE sheet 50, since the position of the wing fixture 72 is fixed, there is a problem in that positioning is not free.

If the wing fixture 72 is a fixed point, there is a problem that "local response and adjustment" is not easy.

3) Let's take a look at the prior art-3 applied to the "integrated sheet structure".

The prior art-3 (Patent Registration No. 10-1100846) is shown in Figs. 2A and 2B as a "integrated sheet structure". Unlike the "integrated sheet structure", the nonwoven fabric 40 and the PE sheet 50 are "separated sheet structure" from each other. As shown in Figure 1f, the wing fixture 72 is heat-sealed (56) to the PE sheet (50).

Looking at the problem of the "adhesive fastener 400" of the prior art-3 is as follows.

As shown in FIG. 2A, three leg portions 400 are integrally formed from the circular central portion 300 in the fastener 400. Velcro fasteners 500 are attached to the three leg portions 400. The nail hole 313a is formed in the circular central portion 300. As shown in Figure 2b, the fastener 400 is installed on the surface of the shotcrete 600 by the tableting of the fixing nail 315. The non-woven fabric 712 of the "integrated sheet" is attached to the velcro fastener 500 of the adhesive fastener 400.

The "adhesive fastener 400" of the prior art-3 is suitable for "local response and adjustment" because it is adhered and fixed along the roughness and the curved surface. "Overall response/adjustment" is not actually made by the "adhesive fastener 400". Since the “overall response and adjustment” is not made, the connection spacing of the overlapping portion of the PE sheet 50 increases as the placement of the PE sheet 50 goes down from the top end, making it difficult to connect the joints due to heat fusion of the overlapping portion. have.

4) Let's take a look at the prior art-4 applied to the "integrated sheet structure".

Prior Art-4 (Patent Registration No. 10-1056108) is shown in FIGS. 3A, 3B, and 3C as a "integrated sheet structure". The "support piece 130 structure" of the prior art-4 is a structure made of "the elastic band 134 between the ring-shaped fixing pin 132 and the synthetic resin attachment plate 136".

Looking at the problem of the "support piece 130 structure" of the prior art-4 is as follows.

First, the elastic band 134 of the “support piece 130 structure” merely serves to bring the synthetic resin attachment plate 136 closer to the shotcrete surface 150 so that nails can be easily compressed by the elasticity.

Accordingly, it is difficult to move the “integrated sheet 100” left and right by the “support piece 130 structure”. This is because the elastic band 134 of the “support piece 130 structure” first increases when moving from side to side, so that the elastic band 134 does not have control power to move the “integrated sheet 100”.

For this reason, the "supporting 130 structure" is suitable for "local response/adjustment" only because the elastic band 134 is stretched.

The elastic band 134 is stretched by excessively pulling for ``overall response and adjustment'', and its elasticity is lost, leading to the problem of sagging of the ``integrated sheet 100'', and overlapping part is caused by pressurization of the lining concrete. There is a tearing problem.

In addition, since the contact area between the ring-shaped fixing pin 132 and the wound nonwoven fabric 110 is extremely small, the lack of the weight bearing capacity of the "integrated sheet" is also a reason not suitable for "overall correspondence and adjustment."

Second, since the ring-shaped fixing pin 132 must be wound on the nonwoven fabric 110 in a state where the field of view is obscured by the “integrated sheet 100” at a high altitude, it is difficult to insert and the winding is not visible, so the ring-shaped fixing pin 132 This deeply penetrated into the PE waterproof sheet 120, there is a problem of leakage. There is a problem in that the tear spreads from the perforated portion of the PE waterproof sheet by the subsequent pressurization of the lining concrete.

Third, since the ring-shaped fixing pin 132 is wound on the non-woven fabric 110 of the “integrated sheet 100”, the selection of the detachable position of the ring-shaped fixing pin 132 is not free and limited, so that the “integrated sheet 100” is open. However, there is a limitation in applying to a long curved surface.

Fourth, even if the material of the attachment plate 136 of the "integrated sheet 100" is made of synthetic resin, there is a problem in that its rigidity is greater than that of the fabric in its flexibility. Here, the flexibility is a flexibility for minimizing the separation distance between the "integrated sheet 100" and the shotcrete for a rough or long curved surface. Since the fixing nail 138 is embedded in the attachment plate 136, the more flexible the synthetic resin is, the easier it is to be torn by the fixed nail 138. Rigidity should be given priority over flexibility to avoid tearing. Rigidity soon has a problem that the separation distance becomes large.

Meanwhile, after the waterproof sheet is laid on the shotcrete surface, a lining formwork is installed as shown in FIG. 7. Normally, lining concrete mortar is injected into the injection hole at the top end. Lining concrete mortar injected into the top end of the tunnel is gravity and falls into the lower part of the tunnel and is an injection method that gradually fills toward the upper part of the top. At this time, when gravity and fall of lining concrete mortar, the waterproof sheet is pushed on the shotcrete surface and pushed in the direction of gravity. As the waterproof sheet is pushed, a floating space is formed between the shotcrete surfaces of the waterproof sheet as shown in FIG. The floating space is a state in which the waterproof sheet is taut, that is, a state in which a large tensile stress is applied. If lining concrete mortar is continuously injected, a greater tensile stress is applied to the waterproof sheet and a large pressure is generated in the excitation space. There is a problem of tearing because it cannot withstand the large tensile stress on the waterproof sheet. If the waterproof sheet is not torn, there is a problem in that the lining concrete mortar is no longer injected and becomes structurally vulnerable due to the large pressure generated in the excitation space. These problems are the main reason why the waterproof sheet installed due to gravity and falling of the lining concrete mortar is pushed in the direction of gravity.

⒜ In the present invention, T-Velcro movable free wing is attached to the nonwoven fabric of the integral sheet with respect to the whole of the excavation and the curved surface (S). And overlapping and spacing adjustment of the overlapping portion of the ``integrated sheet 1000'' through ``overall coordination and adjustment'' for the entire curved surface S while optimizing ``local response and adjustment'' for each area. The purpose is to make the excitation distance minimized gradually by the method of static→adherent fixing,

2 In the support structure (J)(J1)(J2) of temporary installations installed in the order of Ⅰ→Ⅱ→Ⅲ, two O points on the XY axis of the Ⅰ area are symmetrical with respect to the origin O, O1, O2 of each area. With respect to the entire surface of the excavation and the curved surface S, four directional movement wing length portions 1340 are tableted, and then only one directional movement wing length portion 1340 is tabletted to the origins O1 and O2 of regions II and III. There is another purpose to make it easy to optimize overlap and separation of overlapping parts by overall response and adjustment.

에서 In the state where the overlapping and spacing adjustment of the overlapping part is optimized, the provisional self-supporting structure (J) in area I is determined as the self-supporting central axis structure (K) by the "temporary fixation→adhesion fixation" method. On the other hand, the installation of the "integrated sheet 1000" in the region I is completed, while only one directional movement wing length portion 1340 is tabletted to the origin O1 of the region II to the origin O1 in the temporary mounting support structure J1. Symmetrically fix the four directional movement wing lengths 1340 on the X1-Y1 axis, respectively, and use this method in the same way as in Area I by the "Temporary Fixation → Adherence Fixation" method (K1 ), focusing and tableting the length display section 1342 gradually by the "Temporary Fixation → Adherence Fixation" method through "Local Response and Adjustment" for the rough and curved surfaces S in the II area. The integral sheet in the area Ⅱ is installed and completed so that the lifting distance is minimized, and only one directional movement of the wing length part 1340 is provided at the origin point O2 of the area Ⅲ. The supporting structure (J2) is symmetrical to the origin point O2. In this way, the four length-moving wing length sections 1340 are fixed on the X2-Y2 axis, respectively, and this is fixed in the same manner as in the area II by the "tentative fixation→adherent fixation" method (K2 ), and by locating and completing the "integrated sheet 1000" in the Ⅲ area, optimization of the overlap portion for the "overall response and adjustment" across the Ⅰ, Ⅱ, and Ⅲ areas is made easy, and thus the "local" There is another purpose to make the installation work efficiently because the process of minimizing the excitation distance for response and adjustment” is simple,

밀착 The contact and fixation of the excitation distance of the T-type velcro movable free wing part 1300 is brought into contact with and fixed to the length display part 1342 of the directional movement wing length part 1340 through ``temporary fixation → close fixation''. Another purpose is to minimize the excitation distance of the "integrated sheet 1000" with respect to the surface S,

면적 The area size of the Velcro attachment portion 1320 of the T-type velcro movable free wing portion 1300 applied to the self-supporting central shaft structure (K, K1, K2) and the width of the directional moving wing length portion 1340 are other than that The area of the other T-shaped Velcro movable free wing portion 1300 is larger than the area size of the Velcro attachment portion 1320 and the width of the directional moving wing length portion 1340, but the length of the directional moving wing length portion 1340 is constant. Another purpose is to adjust and optimize the front-to-back and left-right movement of the integral sheet by pulling the directional movement wing length portion 1340 from the origin of the self-supporting central axis structure (K, K1, K2) by making it the same length.

⒡ Also, increase and install the number of T-shaped velcro movable free wing parts 1300 installed and fixed in areas Ⅰ→Ⅱ→Ⅲ with respect to the Ⅳ areas of the side walls, but 25~35% for the Ⅰ area and 15~ for the Ⅱ area. Another purpose is to increase and install the 20% and Ⅲ areas by 5 to 10%, thereby minimizing the pushing in the direction of gravity of the ``integrated sheet (1500)'' due to gravity and falling of the lining concrete mortar injected into the injection hole at the top end. There is this.

First, the configuration of the optimized installation system for the arch-direction waterproofing sheet by the T-type Velcro movable free wing for the integrated sheet of the present invention is as follows.

"Integrated sheet 1500", which is spread across the entire tunnel arch direction and is attached to the non-woven fabric 1520 by the velcro attachment portion 1320 of the T-type velcro movable free wing portion 1300, the directional movement wing length portion 1340 is attached. ”, divided into Ⅰ,Ⅱ,Ⅲ Ⅳ areas, and the reference points of Ⅰ,Ⅱ,Ⅲ areas as O, O1, O2 are the origin of the XY axis, and the origin O of Ⅰ area is the crown part of the ceiling, Ⅱ,Ⅲ The origins O1 and O2 of the region are located at the centers of the II and III regions, respectively, and in the formation of the self-supporting support structure (J), each of the two O points on the XY axis of the origin O of the region I is symmetrically four. The directional movement wing length portion (1340) is compressed on the shotcrete surface (2000) to form a provisional self-supporting structure (J), and then only one directional movement wing length portion (1340) at the origins O1, O2 of the II and III regions. ) To form a self-supporting self-supporting structure (J1)(J2), respectively, and excavation and a curved surface (S) by the provisional self-supporting structure (J)(J1)(J2) in areas I, II, and III. The overlapping and spacing adjustment of all overlapping parts of the ``integrated sheet 1500'' is optimized through the ``overall response and adjustment'' for the whole, while the overlapping and spacing adjustment is optimized, the provisional self-supporting structure of the provisional area in area I (J) Four directional movement on the XY axis Wing length part 1340 is gradually tightened and compressed to the shotcrete surface 2000 by shortening the length display part 1342 in accordance with the method of "temporary fixation> ``Integral sheet corresponding to the excavation and the curved surface (S) in forming the self-supporting central axis structure (K) and installing the new directional movement wing length part 1340 in the XY direction over the Ⅰ area (1500)'' while allowing the Velcro attachment portion 1320 to be attached to the proper position of the non-woven fabric 110 so that the length of the direction-moving blade length portion 1340 is minimized, but short-cut surface through the ``temporary fixation→adhesion adjustment'' method The length display section 1342 was tableted and fixed in (2000) to complete the installation of the "one-piece sheet 1500" in the region I, while symmetrically placing O1 on the X1-Y1 axis of the origin O1 of the region II. Tablets are compressed into the length display portion 1342 of the four-direction wing length portions 1340 by two, and the length display portion 1342 is closely adhered to and compressed by the "temporary fixation → close fixation" method. The central shaft structure (K1) is formed on the shotcrete surface (2000), and a new directional movement wing length portion (1340) is installed around it, and the installation of the ``integrated sheet (1500)'' in the area II is completed, followed by On the X2-Y2 axis of the origin O2 of the Ⅲ area, O2 is symmetrically compressed into the length display section 1342 of four directional movement wing length sections 1340, each of them by the "tentative fixation → close fixation" method. A self-weight support center shaft structure (K2 is formed on the shotcrete surface 2000) in which the excitation distance is minimized by closely adhering and tableting the length display portion 1342, centering on this, and installing a new directional movement wing length portion 1340 in the III region. The "integrated sheet 1500" is installed and completed, and the "integrated sheet 1500" in the IV area is installed and completed by the T-shaped velcro movable free wing 1300 to the areas I, II, III and IV. The overall overlap is optimized through the ``overall response and adjustment'' for the entire excavation and the curved surface (S), and the ``local fixation→adhesion fixation'' method gradually minimizes the excitation distance through the ``local response and adjustment'' for each area. It is an optimized installation system for the arch-direction waterproofing sheet by the T-type Velcro movable free wing for the integrated seat, which is characterized by being made.

Here,

The number of T-shaped velcro movable free wing parts 1300 is increased and installed in the Ⅰ→Ⅱ→Ⅲ area and fixed to the “one-piece sheet 1500” with respect to the sidewall part Ⅳ area, but the area Ⅰ is 25~35%, The area of Ⅱ is increased by 15~20% and the area of Ⅲ is increased by 5~10% to minimize the pushing of the ``integrated sheet (1500)'' in the direction of gravity due to the gravity drop of the lining concrete injected into the injection hole at the top end. It is a T-shaped Velcro movable free wing for the integrated seat characterized by the arch-direction waterproof seat optimization installation system (see Fig. 6).

At this time, the side wall IV region is a vertical side wall portion, and the I, II, and III regions are arch surfaces that are close to horizontal. The tunnel arch surface except the side wall area Ⅳ is divided into three areas, Ⅰ, Ⅱ, and Ⅲ.

Not only that,

The T-type velcro movable free-wing section for the integrated sheet, characterized in that a length display section 1342 for temporary fixing and close-fixing is displayed on the directional moving wing length 1340 of the T-type velcro movable free wing section 1300. It is an optimized installation system for waterproof seats in the arch direction.

Also,

While the velcro attachment portion 1320 and the directional movement wing length portion 1340 of the T-type velcro movable free wing portion 1300 are flexible woven fabrics, the binding portions 1360 of both members are firmly coupled and secured by a sewing line. It is an optimized installation system for the arch-direction waterproofing sheet by the T-type velcro movable free wing for the integrated seat.

The integral sheet 1500 is supported and fixed to the shotcrete surface 2000 by a T-shaped velcro movable free wing 1300. The Velcro attachment portion 1320 of the T-type Velcro movable free wing portion 1300 is free to position the nonwoven fabric 1520 of the integral sheet. This is because the nonwoven fabric 1520 is well attached anywhere. Accordingly, since the attachment position selection of the nonwoven fabric 1520 with respect to the excavation and the curved surface S is free, it is easy to adhere and fix the direction movement wing length portion 1340 by the length display portion 1342. By temporarily fixing and tableting the longest part of the length display portion 1342, the length is narrowed by the "tentative fixation→adhesive fixation" method to minimize contact and fixation.

Here, the integral sheet 1500 is a sheet in which the nonwoven fabric 1520 and the PE sheet 1550 are heat-sealed 1530 and integrated. Tableting means being fixed by a nail.

The free attachment position selection of the T-type Velcro movable free wing part 1300 and the "tentative fixation→adhesive fixation" method by the length display part 1342 minimize adhesion of "local response/adjustment" to the excavation and curved surface S · It is fixed.

The present invention optimizes the excitation distance as the overlap and separation of all overlapping parts are adjusted through ``overall coordination and adjustment'' for all excavations and curved surfaces (S), while excavation through ``local coordination and adjustment'' in this state. And the excitation distance to the curved surface S is minimized.

To put this in more detail, for "overall coordination/adjustment", an XY axis is formed on each origin in areas I, II, and III, and a temporary support structure (J) (J1) (J2) is formed at each origin. And, with respect to all the excavation and the curved surface S, the adjustment of overlap and separation of the entire overlapping portion is optimized, and the minimization of the excitation distance follows.

"Local response and coordination" is the process of determining the provisional self-supporting structure (J) (J1) (J2) for each area from self-supporting support shaft structure (K) (K1) (K2). And it is exerted in the installation process in each area centering on the self-supporting central axis structure (K)(K1)(K2). This exercise is for minimizing the excitation distance to the excavation and the curved surface (S).

Here, the integral sheet 1500 is laid in the order of Ⅰ→Ⅱ→Ⅲ→IV, but the area of Ⅳ is close to the vertical as it goes to the top, so the integral sheet 1500 is located in the direction of gravity, so the area Ⅳ is located. There is no provisional fixation in area IV because leaving it open is much easier for "overall coordination and coordination."

Usually, the integral sheet 1500 is laid from the top end toward the bottom. Adjusting the connection portion of the overlap is facilitated by first performing "overall correspondence/adjustment" for the entire length of the integral seat 1500 in the arch direction, and then making detailed adjustments by "local response/adjustment".

As described above, the present invention enables optimization of overlap and separation adjustment of overlapping parts through "overall coordination and adjustment" for the roughness and the curved surface S, and also through "local fixation and adjustment". It is intended to minimize the excitation distance by the method of "adhesive fixation".

In addition, second, the structure of the T-type velcro movable free wing structure for the integrated sheet of the present invention is as follows.

The ``integrated sheet 1500'' is fixed to the shotcrete surface 2000 by a T-shaped velcro movable free wing 1300 from the crown apex to the area I→II→III→IV from the crown apex in the state that extends throughout the tunnel arch direction. , At this time, the structure of the T-type velcro movable free wing 1300 is composed of a velcro attachment part 1320, a directional movement wing length part 1340, and a binding part 1360, but in a direction with the velcro attachment part 1320. The moving wing length part 1340 is a flexible material, and the binding parts 1360 of both members are firmly combined and attached, and the direction of the moving wing length parts 1340 with respect to the excavation and the curved surface S is fixed. T-type velcro movable free wing for integrated sheet, characterized in that the ``integrated sheet (1500)'' is adhered to and fixed to the shotcrete surface (2000) by ``tentative fixation→adherent fixation'' through the length display part 1342 of Structure.

Here,

The length of the directional moving wing length portion 1340 of the T-type Velcro movable free wing portion 1300 is the same, but the directional moving wing length portion is proportional to the magnitude of the pulling force transmitted to the directional moving wing length portion 1340. It is a T-type Velcro movable free wing structure for an integrated sheet, characterized in that the size of the area of the Velcro attachment portion 1320 attached to (1340) and the size of the width of the directional movement wing length portion 1340 are also varied accordingly.

Also,

While the velcro attachment portion 1320 and the directional movement wing length portion 1340 of the T-type velcro movable free wing portion 1300 are flexible woven fabrics, the binding portions 1360 of both members are firmly coupled and secured by a sewing line. It is a T-type Velcro movable free wing structure for an integrated seat, which is characterized by being.

In addition, the T-shaped velcro for the integrated sheet, characterized in that the length display portion 1342 for temporary fixing and close fixing is displayed on the directional moving wing length portion 1340 of the movable free wing portion 1300. It is a movable free wing structure.

For all excavations and curved surfaces (S) across the Ⅰ,Ⅱ,Ⅲ,Ⅳ areas, not only the entire overlapping part is adjusted through 「Overall Response·Adjustment」, but also “Temporary Fixation→Adherence” through “Local Response·Adjustment” for each area It is in the structure of the T-type velcro movable free wing that freely selects the attachment position by minimizing the lifting distance by close and tableting the length display portion 1342 by the fixing method.

The T-type velcro movable free wing structure is a T-shaped structure composed of a velcro attachment part 1320 and a direction-moving wing length part 1340 having a length display part 1342. The Velcro attachment portion 1320 and the directional movement wing length portion 1340 are preferably fabrics. The fabric is excellent in flexibility and has good adaptability to the roughness and the curved surface (S), and can also sew a T-shaped joint to make the work efficient and robust. This does not, however, limit the T-shaped joint to the seam alone.

The Velcro attachment portion 1320 is free to select the attachment position of the nonwoven fabric 1520 of the "integrated sheet 1500". The adhesive force of the Velcro attachment portion 1320 is proportional to the size of the area. The greater the attachment force of the Velcro attachment portion 1320, the larger the width of the direction-moving blade length portion 1340 is. This is because it is easy to move back and forth between the "integrated sheet 1500" by pulling the directional movement wing length portion 1340. In addition, the length display portion 1342 is useful for the longest, and gradually close, tableting during the temporary fixing by the "tentative fixation→adherent fixation" method.

As described above, the structure of the T-type velcro movable free wing for the integral sheet of the present invention allows the positioning of the detachable attachment and detachment of the T-type velcro movable free wing against the non-woven fabric of the integral sheet with respect to all excavations and curved surfaces (S). Ⅱ→Ⅲ Overlap and spacing adjustment of the overlapping part of the ``integrated sheet (1500)'' through ``overall coordination and adjustment'' for all excavations and curved surfaces (S) across all areas, while optimizing ``local'' by area It is a useful structure to gradually minimize the excitement distance through the ``Temporary Fixation → Adherence Fixation'' method through response and adjustment.

⒜ In the present invention, the position of the detachable attachment and detachment of the free wing of the T-shaped velcro to the nonwoven fabric of the "integrated sheet" with respect to all the excavations and the curved surfaces (S) is free, and the excavation covering the entire area of I→II→III from the crown of the ceiling And overlapping and spacing adjustment of the overlapping part of the ``integrated sheet'' through ``overall coordination and adjustment'' for the entire curved surface S, as well as ``local fixation and coordination'' through ``local coping and adjustment'' for each area→ The effect of minimizing the excitation distance is achieved by the method of'adhering and fixing'.

2 In the support structure (J)(J1)(J2) of temporary installation installed in the order of Ⅰ→Ⅱ→Ⅲ, two O points on the XY axis of Ⅰ area are symmetrical with respect to the origin O, O1, O2 of each area. Four directional moving wing lengths 1340 are tableted, and then only one directional moving wing length 1340 is tabletted to the origins O1 and O2 of regions II and Ⅲ, so that the entire surface of the excavation and the curved surface S is `` Overall response and adjustment” has the effect of easily optimizing the overlapping and spacing adjustment of the overlapping portion of the “integrated sheet 1500”,

에서 In the state where the overlapping and spacing adjustment of the overlapping part is optimized, the provisional self-supporting structure (J) in area I is determined as the self-supporting central axis structure (K) by the "temporary fixation→adhesion fixation" method. On the other hand, while installing and completing a ``one-piece sheet'' in the Ⅰ area, only one directional movement wing length part 1340 is provided at the origin O1 of the Ⅱ area. -On the Y1 axis, each of the two directional movement wing length sections 134 is temporarily fixed, and this is converted into a self-supporting central axis structure (K1) in the same manner as in the Ⅰ area by the "temporary fixation→adhesion fixation" method. Based on this, the length display part 1342 is gradually brought into close contact with and compressed by the method of ``temporary fixation→adherence fixation'' through ``local response/adjustment'' with respect to the excavation and curved surfaces S in the area Ⅱ. The integral seat 1500 in area Ⅱ is minimized to be installed and completed, and only one directional movement of the wing length section in the area O2 in the area Ⅲ is provided in the supporting structure (J2). Each of the two axially moving wing lengths is fixed on the Y2 axis, and this is fixed to the self-supporting central axis structure (K2) in the same way as in area Ⅱ by the "tentative fixation → close fixation" method. By integrating and completing the integral sheet in the area, optimization of the overlapping part for "overall coordination and coordination" across Ⅰ, Ⅱ, and Ⅲ areas is facilitated, thereby minimizing the excitement distance for ``local coordination and coordination'' for each area. The installation process is simple and the installation work is effective.

밀착 The T-type Velcro movable free wing part's excitation distance is fixed and fixed to the length display part of the wing length through 「Temporary Fixation → Close Fixation」, thereby minimizing the excitation distance of the integral sheet against the excavation and the curved surface (S). It has the effect of

면적 The area size of the Velcro attachment portion of the T-type velcro movable free wing applied to the self-supporting central shaft structure (K, K1, K2) and the width of the wings are other than the other T-type Velcro movable free wing velcro attachment (1320) ) Is larger than the size of the area and the width of the wing, but the length of the wing is set to be the same length so that the front and back and left and right movements of the integral sheet are adjusted by pulling the wing at the origin of the self-supporting central shaft structure (K, K1, K2). Has the effect of being optimized,

⒡ Also, increase and install the number of T-type velcro movable free wing parts 1300 installed and fixed in areas Ⅰ→Ⅱ→Ⅲ with respect to the Ⅳ areas of the side walls, but 25~35% for the Ⅰ area and 15~ for the Ⅱ area. By increasing and installing 5% to 10% in the 20% and Ⅲ areas, it is useful to have the effect of minimizing the pushing of the ``integrated sheet (1500)'' in the direction of gravity due to gravity and falling of the lining concrete mortar injected into the injection hole of the top end. It is an invention.

[Fig. 1a] A cross section showing a general tunnel structure in which a shotcrete for reinforcing the tunnel ground, a non-woven fabric and a waterproof sheet for waterproofing, and a concrete lining are sequentially installed.
1B is a perspective view showing a disassembled non-woven fabric and waterproof sheet of the prior art-1.
[Fig. 1C] A cross-sectional view in the arch direction showing a state in which the non-woven fabric and waterproof sheet of the integrated method shown in Fig. 1B are deflected from the shotcrete surface.
[Fig. 1d] An exploded cross-sectional view for a detachable waterproof sheet unit equipped with a fixture capable of omnidirectional flow in the prior art-2 to be installed on a nonwoven fabric placed on a shotcrete surface.
[Fig. 1E] A cross-sectional view showing a state in which the detachable waterproof sheet unit with a fastener capable of flowing in all directions in Fig. 1D is attached and installed on a nonwoven fabric placed on a shotcrete surface
[Figure 1f] An embodiment showing a state in which the fasteners capable of omnidirectional flow are heat-sealed to the detachable waterproof sheet unit of Figure 1d.
[Fig. 2a] An exploded perspective view of a prior art-3 tunnel-type waterproof member for a fastener.
[Fig. 2B] A cross-sectional view showing the state in which the waterproof member is installed and fixed in the state where the adhesive fastener of the tunnel waterproof member in Fig. 2A is installed on the shotcrete surface.
[Fig. 3A] A perspective view of a prior art-4 one-layer waterproof sheet structure.
Fig. 3b is a state diagram showing a state in which the laminated waterproof sheet structure of Fig. 3a is fixed to the shotcrete surface by a support piece.
[Fig. 3C] A perspective view of the support piece of Fig. 3A.
4A is a perspective view of the present invention T-type Velcro movable free wing
[Fig. 4b] Photo-1 of the present invention T-type velcro movable free wing
[Fig. 4c] Photo-2 of the present invention T-type velcro movable free wing
5 is a perspective view of the integral sheet of the present invention
[Figure 6] Section of the invention Ⅰ→Ⅳ for preventing the direction of gravity in the direction of gravity of the integral sheet when pouring lining concrete
7 is a cross-sectional perspective view showing the gravity direction pushing relationship between the lining concrete and the waterproof sheet according to the injection of the top end of the present invention when pouring the lining concrete

When explaining the configuration of the method for installing the integrated seat in the arch direction using the T-type Velcro movable free wing structure of the present invention is as follows.

In the waterproof method in which the integral sheet is installed in the arch direction

4 Four T-shaped velcro movable free wing parts, each of two symmetrically O points on the XY axis of the origin O of the I area, with the ``integrated sheet 1500'' installed across the I, II, III, and IV areas (1300) is attached to the ``integrated sheet (1500)'', but the T-Velcro movable free wing portion (1300) of the Velcro attachment portion (1320) is attached to the nonwoven fabric (1520) of the ``Integral Sheet (1500)'', and T The length indicating portion 1342 of the directional movement of the velcro-movable free wing portion 1300 and the length display portion 1342 of the wing length portion 1340 is compressed into the shotcrete 2000 so that the provisional support structure J of the region I is applied to the shotcrete surface 2000. One T-shaped velcro movable free wing 1340 is attached to the origin points O1 and O2 of the Ⅱ and III areas as in the above I area, and is attached to the ``integrated sheet 1500'' but the T-type velcro movable free wing The Velcro attachment portion 1320 of (1300) is attached to the nonwoven fabric 1520 of the "integrated sheet 1500", and the length display portion of the direction-moving wing length portion 1340 of the T-type Velcro movable free wing portion 1300 (1342) is compressed into the shotcrete 2000 to form a support structure (J1) (J2) for each provisional weight in the II and III regions on the shotcrete surface 2000;

「``Integrated sheet (1500)'' by supporting structures (J) (J1) (J2) of each temporary installation in areas I, II, and III through ``overall coordination and adjustment'' for the entire excavation and curved surface (S) Optimizing the overlap and separation adjustment of the entire overlap portion of the;

에서 In the above step ⒝, in the state where the overlap and the separation adjustment are optimized, the four directional movement wing length sections 1340 on the XY axis of the provisional self-supporting structure (J) in the region I are set by the "Temporary Fixation → Adherence Fixation" method. Gradually close to the shotcrete surface (2000) to form a self-supporting central shaft structure (K) with a minimized excitation distance, and by installing a plurality of new T-type Velcro movable free wing parts (1300) at appropriate positions around it Installing and completing the ``integrated sheet (1500)'' in the Ⅰ area so that the excitation distance of the ``integrated sheet (1500)'' in the Ⅰ area is minimized by the ``temporary fixation→adherent fixation'' method of the directional movement wing length part 1340 step;

⒟ Following section Ⅰ, four directional movement wing lengths 1340 on the X1-Y1 axis of provisional supporting structure (J1) in section Ⅱ are gradually short shot surface (2000) Forming a self-supporting central shaft structure (K1) that is closely attached to the tablet and minimizes the lifting distance, and installs a plurality of new T-type velcro movable free wing parts (1300) at appropriate positions around it. 1500)', the step of installing and completing the "integrated sheet 1500" in the area II so that the excitation distance is minimized by the "temporary fixation → close fixation" method of the directional movement wing length portion 1340;

가 Following the area Ⅱ, the four-direction moving wing lengths 1340 on the X2-Y2 axis of the provisional support structure (J2) in the provisional installation of the area Ⅲ are gradually shotcrete (2000) It forms a self-supporting central shaft structure (K2) that is closely attached to the tablet and minimizes the lifting distance, and installs a plurality of new T-shaped Velcro movable free wing parts (1300) at appropriate positions around it. 1500)”, the step of installing and completing the “integrated sheet 1500” in the III area so that the excitation distance is minimized by the “temporary fixation→adherence fixation” method of the directional movement wing length portion 1340;

「Following the Ⅲ area, the ``integrated seat 1500'' is installed on the shotcrete 2000 surface by the T-type velcro movable free wing part 1300, but the velcro attachment part of the T-type velcro movable free wing part 1300 (1320) is attached to the non-woven fabric 1520 of the ``one-piece sheet (1500), the directional movement of the T-shaped velcro movable wing 1300, the wing length portion 1340 is compressed into the shotcrete 2000, `` Temporary fixation→adhesive fixation The ``integrated sheet (1500)'', which minimizes the excitation distance, is installed and completed in the area IV as the wing length section 1340 gradually adheres to and compresses the shotcrete surface 2000 by the method. The step of being; is an arch-direction integrated sheet installation method using a T-shaped velcro movable free wing structure.

Here,

The length of the directional movement wing length portion 1340 of the T-shaped velcro movable free wing portion 1300 is the same, but in proportion to the magnitude of the pulling force transmitted to the directional movement wing length portion 1340, the directional movement wing length portion 1340 ), the size of the area of the Velcro attachment portion 1320 and the size of the width of the direction-moving wing length portion 1340 are also varied accordingly. It is a sheet installation method.

The present invention enables optimization of overlap and separation adjustment of overlapping parts through "overall coordination and adjustment" with respect to the excavation and curved surfaces (S). The method is to minimize the excitation distance. In this regard, the process of laying the "integrated sheet 1500" over the tunnel arch direction is as follows.

First, in the origin O of the region I, the O-points on the X-Y axis are symmetrically set to be a provisional support structure J by means of four directional movement wing lengths 1340. It is preferable that the temporary mounting support structure J is temporarily fixed to the longest side of the length display portion 1342. Subsequently, one direction-moving wing length portion 1340 is temporarily fixed to the length display portion 1342 at the origin points O1 and O2 of regions II and III. The longest length is preferably 20-40 cm. The four directional movement wing lengths 1340 are installed around the origin O of the temporary support structure (J) in the Ⅰ area, so that the support can be achieved in a balanced manner as the center of gravity of the entire area in the tunnel arch direction. .

Second, the temporary support structures (J)→(J1)→(J2) are sequentially installed in areas I, II, and III of the excavation and curved surfaces (S), and the temporary support structures (J) ( Adjust the overlap and separation of overlapping parts of Ⅰ→Ⅱ→Ⅲ through J1)(J2). At this time, the extreme overlap and separation of all overlapping parts are adjusted by "overall correspondence/adjustment" with respect to the excavation and curved surfaces S in the areas I, II, and III. "Overall response and adjustment" is the optimization adjustment function.

The relationship between the supporting structures (J) (J1) (J2) and the directional blade length (1340), which are installed in the order of Ⅰ→Ⅱ→Ⅲ, is as follows.

The origin of the self-supporting structure (J)(J1)(J2) of the X-Y axis in the Ⅰ,Ⅱ,Ⅲ area is O, O1, O2. The origin O of the I area is the crown portion of the top end, and the origins O1 and O2 of the II and III areas are located near the lower point areas of the I and II areas. At the origin O of region I, four directional movement wing lengths 1340, each of which are symmetrically symmetrical with two O points on the X-Y axis, are formed to form a temporary self-supporting structure J. Areas I, II, and III are toward the top of the top portion where it is difficult to minimize the separation distance of the "integrated sheet 1500". It is divided into three parts at the top of the cloth, which is difficult to minimize.

Only one direction-moving wing length portion 1340 is tableted to the origins O1 and O2 of the regions II and III to form support structures J1 and J2 respectively. Provisional installation The self-supporting structure (J1) (J2) is moved in the direction of the length of the wing length portion (1340) is temporarily fixed to the longest side of the length display portion (1342).

The longest side is fixed, and the "integrated seat 1500" is free to move left and right, so it is easy to adjust the overall overlap and separation. The directional movement wing length portion 1340 is a pulling means of the integral sheet. Provisional installation self-supporting structure (J) (J1) (J2) attached to the directional movement of the wing length portion (1340) has a larger area than the other Velcro attachment portion (1320), the direction of the moving wing length portion (1340) This is why the wide width.

Third, the overlap and separation of all overlapping parts are adjusted by the support structure (J)(J1)(J2) of the provisional self-weight through 「Overall Response·Adjustment」, and in this state, 4 on the XY axis of the origin O of area I The temporary installation self-supporting structure (J) of the dog-direction wing length section (1340) is gradually brought into close contact with the length display section (1342) by the "temporary fixation→adhesion fixation" method to minimize the lifting distance. It is determined by the self-supporting support shaft structure (K).

Focusing on the self-supporting central axis structure (K) of the area I, the length display part (1342) is gradually applied to the rough and curved surfaces (S) within the area I through the "local fixation/adjustment" method. ) To complete the installation of the "integrated sheet 1500" in the area I so that the excitation distance is minimized.

Fourth, four directional movement wing lengths 1340 are fixed on the X1-Y1 axis symmetrically to the origin O1 of the temporary supporting structure J1 of the provisional installation structure J1 in the area II following the area I. The four directional moving wing length sections 1340 fixed on the X1-Y1 axis are determined to be the self-supporting central axis structure (K1) in the same way as in area I by the "Temporary Fixation → Adherence Fixation" method. Centering on the sloping and curved surfaces (S) in the area Ⅱ, through the ``local response and adjustment,'' the ``temporary fixation→adhesion fixation'' method gradually closes and tablets the length display part 1342 to minimize the excitation distance Ⅱ Complete the installation of the "integrated sheet 1500" in the area.

Fifth, four directional movement wing lengths 1340 are fixed on the X2-Y2 axis symmetrically to the origin O2 of the provisional self-support structure J2 of the provisional installation structure in the area III following the area II. The four directional moving wing length sections 1340 fixed on the X2-Y2 axis are determined as the self-supporting central axis structure (K2) in the same way as in the area I by the "Temporary Fixation → Adherence Fixation" method. Centering on the sloping and curved surfaces (S) in the area Ⅲ, through the ``local response and adjustment,'' the ``temporary fixation→adhesion fixation'' method gradually closes and tablets the length display part 1342 to minimize the lifting distance Ⅲ Complete the installation of the "integrated sheet 1500" in the area.

As described above, the velcro attachment portion 1320 of the T-type velcro movable free wing portion 1300 is free to select the attachment position anywhere on the nonwoven fabric 1520 of the integral sheet, and is provided with respect to the excavation and the curved surface S. → It is an invention that not only facilitates the minimization of the adhesion and fixation of the length display portion 1342 by the "adhesive fixation" method, but also facilitates "total response and adjustment" and "local response and adjustment".

1500; Integral seat (1500),
1520; Non-woven fabric (1520), 1550; PE sheet (1550),
1300; T-type Velcro movable free wing (1300)
1320; Velcro attachment 1320, 1340; Directional movement wing length (1340), 1342; Length display unit 1342, 1360; Boundary part (1360),
2000; Shotcrete Cotton (2000)
S; Excavation and winding surface (S)
J; Provisional self-supporting structure (J)
K; Self-supporting center shaft structure (K)

Claims (3)

The ``integrated sheet 1500'' is fixed to the shotcrete surface 2000 by a T-shaped velcro movable free wing 1300 from the crown apex to the area I→II→III→IV from the crown apex in the state that extends throughout the tunnel arch direction. , At this time, the structure of the T-type velcro movable free wing 1300 is composed of a velcro attachment part 1320, a directional movement wing length part 1340, and a binding part 1360, but in a direction with the velcro attachment part 1320. The moving wing length part 1340 is a flexible material, and the binding parts 1360 of both members are firmly combined and attached, and the direction of the moving wing length parts 1340 with respect to the excavation and the curved surface S is fixed. T-type velcro movable free wing for integrated sheet, characterized in that the ``integrated sheet (1500)'' is adhered to and fixed to the shotcrete surface (2000) by ``tentative fixation→adherent fixation'' through the length display part 1342 of rescue The method of claim 1
The length of the directional moving wing length portion 1340 of the T-type Velcro movable free wing portion 1300 is the same, but the directional moving wing length portion is proportional to the magnitude of the pulling force transmitted to the directional moving wing length portion 1340. T-type Velcro movable free wing structure for an integrated sheet, characterized in that the size of the area of the Velcro attachment portion 1320 attached to the (1340) and the width of the directional movement wing length portion 1340 are also varied accordingly. The method of claim 1
While the velcro attachment portion 1320 and the directional movement wing length portion 1340 of the T-type velcro movable free wing portion 1300 are flexible woven fabrics, the binding portions 1360 of both members are firmly coupled and secured by a sewing line. T-type Velcro movable free wing structure for integrated seat

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