CN108330952A - The manufacturing method of steel wall - Google Patents

Abstract

The present invention provides a steel wall, which uses steel pipes or H-shaped steel to reinforce the wall body and is easy to construct, and the wall body is connected by steel sheet piles that can easily maintain high water-tightness. There is a wall formed by connecting multiple hat-shaped steel sheet piles with joints. The steel pipes that reinforce the wall are arranged side by side along the length of the wall. A spacer is provided between the wall and the steel pipe. The wall body is a steel sheet pile wall and is formed in a corrugated plate shape in which unevenness is repeated in the longitudinal direction. The steel pipes are arranged so that a part of the steel pipes enters the concave portion of the wall. The head of the body of wall is connected with the head of the steel pipe. Concrete is used to connect the walls and steel pipes. The load is transferred between the wall and the steel pipe. Thus, the steel wall can form a structure in which the wall body and the steel pipe share the earth pressure and water pressure suffered by the steel wall.

Description

How to make steel walls

This application has an international filing date of May 1, 2012 (date of entering the Chinese national phase: October 31, 2014), an international application number of PCT/JP2012/061574 (Chinese national application number of 201280072877.0), and an invention title of " A divisional application of the application for "Steel Wall".

technical field

The invention relates to a method for manufacturing steel walls used for soil and water conservation, cofferdams, revetment, filling, embankments and the like.

Background technique

Conventionally, steel sheet piles and steel pipe sheet piles have been used for various constructions such as soil and water conservation, cofferdams, bank revetments, landfills, and embankments. Steel sheet piles and steel pipe sheet piles are used according to the required rigidity. Generally, steel sheet piles are used when low rigidity is acceptable, and steel pipe sheet piles are used when high rigidity is required.

Here, the margin of the joint of the steel pipe sheet pile is larger than the margin of the joint of the steel sheet pile. Therefore, when water-tightness is required when constructing cofferdams, bank revetments, etc., a method of filling the joint space with bagged cement mortar is generally employed. When this method is used in waterside environments such as rivers and harbors, there is a possibility that mortar will flow out when a bag filled with mortar is damaged. In addition, since the gap between the bags may become filled with water, it is not necessarily suitable for applications that strictly require water-tightness.

Therefore, the following proposals have been proposed as countermeasures when it is strictly required to prevent water leakage inside the disposal site, such as water-blocking bank revetments in marine waste disposal sites. That is, there has been proposed a structure in which leakage prevention measures are taken for joint spaces of steel pipe sheet piles, and fillers such as mortar are directly filled in the joint spaces (for example, refer to Patent Document 1). In the case of filling mortar in this way, after the steel pipe sheet pile is driven into the ground, it is necessary to discharge soil and sand inside the joint by high-pressure water jets, etc., and to fill the joint with mortar or bag-shaped mortar. Therefore, there is a disadvantage that the on-site work of the steel pipe sheet pile is time-consuming and laborious.

On the other hand, although the rigidity of the steel sheet pile is lower than that of the steel pipe sheet pile, it is excellent in water stop performance, and the play of the joint part is small, and the water stop performance is higher than that of the steel pipe sheet pile even in the state where no measures are taken. In addition, the water-stopping properties of the steel sheet pile can be further improved by coating the joints with a swelling water-stopping material in advance. According to this method, in addition to exhibiting a water-tight performance equivalent to or higher than that of the steel pipe sheet pile implemented above, it is also possible to save the labor of on-site work.

Therefore, as a technique for improving the rigidity of the steel sheet pile, tie-type steel sheet pile walls such as a tie-type steel sheet pile revetment in which a steel sheet pile wall serving as a revetment and a pillar provided on the land side of the revetment are connected by tie rods are known.

In the tie-rod type steel sheet pile wall, in order to connect the steel sheet pile wall and the pillar with a long tie rod, a large construction space is required.

In addition, also in the steel sheet pile wall of the tie rod type, since the steel sheet pile wall and the pillar are connected by a long tie rod, the tie rod can only transmit the tension force but not the compressive force.

Furthermore, as a technique for improving the rigidity of the steel sheet pile, it has been proposed to adopt a combined steel sheet pile in which H-shaped steel is integrated with a U-shaped (hat-shaped) steel sheet pile constituting the wall to enhance rigidity (for example, refer to Patent Document 2). . Since the cross-sectional area of the combination steel sheet pile of such a structure becomes large and the resistance at the time of driving becomes large, the construction method is limited. In particular, construction on hard ground becomes difficult.

Therefore, in order to construct on a hard ground, a construction method using a ground auger (excavation device) for excavating the ground is considered. However, since the cross-sectional shape of the combined steel sheet pile spans a wide range, it is necessary to study countermeasures. As an example of this measure, when erecting the combination steel sheet pile of the structure similar to the combination steel sheet pile of patent document 2 closely, it proposes to adopt the construction method shown below (for example, refer patent document 3). That is, it is proposed to drive in a manner that spans the range excavated with a ground auger when driving the above-mentioned combined steel sheet pile and the range excavated with a ground auger when the combined steel sheet pile that was driven before the combined steel sheet pile is erected closely The proposal of the construction method of the said combination steel sheet pile.

prior art literature

patent documents

Patent Document 1: Japanese Patent No. 3756755

Patent Document 2: Japanese Unexamined Patent Publication No. 2002-212943

Patent Document 3: Japanese Patent No. 4074241

Contents of the invention

The problem to be solved by the invention

As described above, as the rigidity of the steel wall, the rigidity of the steel pipe sheet pile wall is higher than that of the steel sheet pile wall. However, the watertight performance of the joint of the steel sheet pile wall is easier to improve than the watertight performance of the joint of the steel pipe sheet pile wall.

Therefore, as shown in the above-mentioned Patent Document 2, by combining section steel with the steel sheet pile wall which is easy to improve waterproof performance, it is possible to construct a steel wall having both rigidity and high waterproof performance.

However, the cross-sectional area becomes larger by combining the steel sheet pile and the section steel. Therefore, as described above, usable construction methods are limited.

Here, it is considered that the steel sheet pile and the section steel are brought into contact, and the steel sheet pile wall (wall body) formed of the steel sheet pile is reinforced with the section steel, instead of integrally joining the steel sheet pile and the reinforcement such as the section steel. In this case, reinforcement materials, such as a section steel, and a steel sheet pile can also be constructed individually, respectively. However, when the steel sheet piles and reinforcements are separately constructed, for the member constructed earlier, the member constructed later shall be driven in a state where the member constructed later is in contact with the member constructed earlier. The following problems arise. That is, due to the sliding resistance of the steel sheet pile and the reinforcing material, a large force is required at the time of driving, and noise and vibration may be generated. Either of these steel sheet piles and reinforcements may be deformed depending on construction accuracy. In addition, in order to drive the member to be constructed later in a state in which the member to be constructed later is brought into contact with the member to be constructed earlier, the construction method of the member to be constructed later is limited. For example, it is difficult to rotationally press-fit a steel pipe as a reinforcement, and it is difficult to employ a vibratory construction method in which members are vibrated and drilled.

The present invention has been accomplished in view of the above circumstances, and its object is to provide a steel wall that is reinforced with steel pipes or H-shaped steel and that is easy to construct. The wall is made of steel plates that can easily maintain high water-tightness. The piles are connected.

solutions to problems

In order to solve the above-mentioned problems, the steel wall of the present invention is characterized in that a plurality of steel sheet piles are connected by joints to form a corrugated wall with repeated unevenness in the longitudinal direction, and steel pipes or H-shaped steel for reinforcing the above-mentioned walls A plurality of reinforcing members formed are arranged side by side at a distance from the wall along the longitudinal direction of the wall, and are formed in a state where a part of the reinforcing member enters a recess of the wall, and the wall and the reinforcing member Join at the head.

In the present invention, because the wall body and the reinforcement are separated, there are few restrictions on the construction method, and various construction methods that can be used as the reinforcement steel pipe and H-shaped steel to be drilled into the foundation can be selected according to the situation.

That is, since the wall and the reinforcement are separated, the construction of driving the steel sheet piles to the foundation and connecting the steel sheet piles to construct the wall and the construction of driving the reinforcement to the foundation can be performed separately. In addition, the construction shown is facilitated because there is no contact between these walls and reinforcements. For example, by providing a space between the wall body and the reinforcement, construction can be performed by a vibrating hammer construction method. In addition, when the reinforcing material is a steel pipe, it can also be constructed by the construction method of rotary press fitting. In addition, it goes without saying that a static press-fit construction method such as a hydraulic press-fit construction method can also be implemented. In this way, since there are few restrictions on the construction method, various construction methods capable of driving steel pipes and H-shaped steel into the foundation can be selected and adopted according to the situation.

In addition, it is possible to obtain the same high waterproof performance as the conventional steel sheet pile wall.

In addition, there is no need for a wide construction space like a tie-rod wall structure. In particular, since the reinforcing member enters the concave portion side of the wall body, the width of the wall can be formed smaller than the sum of the height of the steel sheet pile and the diameter of the steel pipe, and a steel wall can be constructed with a space-saving construction.

In addition, it is possible to form a structure in which the distance between the reinforcing member and the wall is shortened because the reinforcing member enters the concave portion side of the wall. Unlike the tie-rod type steel sheet pile wall, when the reinforcing member and the wall are connected at the head , capable of transmitting both tensile and compressive forces.

That is, when earth pressure and water pressure act on the steel wall, since the head of the wall and the head of the reinforcement are connected, load can be transmitted between the wall and the reinforcement. Thus, the steel wall can form a structure in which the wall body and the steel pipe share the earth pressure and water pressure suffered by the steel wall. In addition, by connecting and fixing the head portion of the wall body and the head portion of the reinforcing member, vertical misalignment between the wall body and the reinforcing member can be restricted, and shear force can be transmitted.

In addition, in the tie-rod type steel sheet pile structure, a cross brace is required in order to disperse the force acting on the tie rods arranged discretely in the wall extending direction and to make the wall move uniformly. However, in the present invention, the reinforcement enters the side of the recess and transmits the force over a short distance, so the cross brace is not required.

In particular, when a reinforcing member is placed against the steel sheet piles at intervals of one or several steel sheet piles, if there is a gap between the reinforcing member and the steel sheet pile, the reinforcing member will have a partial effect, so cross braces, etc. are required A member that distributes forces in the direction of elongation. However, since the reinforcing material enters the recessed part of the wall body, the reinforcing material can produce an effect even for the steel sheet pile that is not provided with the reinforcing material, and a cross brace or the like is unnecessary.

In addition, an indoor test was carried out. In the center of a solid soil tank with a width of 1957 mm x a height of 1000 mm x a depth of 940 mm, an acrylic plate imitating the corrugation of a steel sheet pile wall and the lower end of an acrylic pipe imitating a steel pipe were bonded with an adhesive. Fix it, and set silica sand No. 5 (dry sand) on the left and right sides of the corrugated acrylic board by the air drop method, and from this state, dig deep from one side of the acrylic board to the lower end to check the change of the wall. Through this experiment, it was confirmed that if the pitch of the steel pipes is 4/7 or less of the wall height, by arranging the reinforcing member so as to enter the concave portion of the wall and connecting the head of the reinforcing member and the head of the wall, the Spacing parts of the reinforcement that are skipped also produce the effect of the reinforcement. Therefore, it is preferable that the pitch L of the reinforcement and the wall height H satisfy L≦4H/7.

In the above structure of the present invention, it is preferable that the wall body and the reinforcement member are connected at the head portion by concrete laid across the head portion of the wall body and the head portion of the reinforcement member.

According to such a structure, since the head of the reinforcing member and the head of the wall are connected by the concrete laid across the head of the reinforcing member and the head of the wall, it is possible to form the head without exposing the steel pipe ( upper end), and the head (upper end) of the steel sheet pile is covered with concrete. Thereby, the appearance of a steel wall can be improved. In addition, since the concrete is drilled so as to straddle the reinforcing member and the wall, there is less risk of collapse of the tip between the steel pipe and the wall.

In addition, in the above-mentioned structure of the present invention, it is preferable that the above-mentioned wall body and the above-mentioned reinforcing member are welded and joined to the above-mentioned wall body and the above-mentioned reinforcing member respectively by the steel plates provided between the above-mentioned wall body and the above-mentioned reinforcing member. The parts are connected.

According to such a structure, since the connection of the steel plate and the reinforcement at the head is performed by welding the steel plate to the reinforcement and the wall, construction is easy and requires less time and labor for construction. For example, the time and labor required to open a hole through which a tie rod is inserted in a steel sheet pile or a steel pipe sheet pile and to pass the tie rod through the hole are unnecessary like in the case of the tie rod type. In addition, when compared with the case of placing the above-mentioned concrete, the curing period of the concrete is unnecessary, and the construction period can be shortened.

In addition, in the above-mentioned structure of the present invention, in addition to welding the steel plates provided between the above-mentioned wall body and the above-mentioned reinforcement member to the above-mentioned wall body and the above-mentioned reinforcement member respectively, the above-mentioned wall body and the above-mentioned reinforcement member are connected at the head. In addition to the connection, the wall and the reinforcing member may be connected at the head using concrete laid across the head of the wall and the reinforcing member.

According to such a structure, since the connection by the welded steel plate and the connection by concrete are combined, beauty and strength can complement each other. For example, concrete is excellent in transmitting the compressive force of the connecting portion, and welded steel plates are excellent in transmitting the tensile force of the connecting portion, so they can complement each other in strength. In addition, enhancement of transmission of tensile force by steel plates and landscaping (environmental arrangement) and safety measures (eg, prevention of tip collapse) by concrete can be complemented.

Moreover, in the said structure of this invention, it is preferable that the said reinforcing material is the said steel pipe.

According to such a structure, high rigidity can be obtained by using a steel pipe as a reinforcement, and the rotary press-fitting construction method and the mid-piercing construction method can be used, and the construction which suppressed noise and vibration can be performed easily.

Moreover, in the said structure of this invention, it is preferable that the space|interval which prevents the said steel sheet pile of the said wall body and the said reinforcement material from contacting during construction is set between the said wall body and the said reinforcement material.

According to such a structure, when constructing a wall body and a reinforcement, the steel sheet pile of a wall and a reinforcement do not contact during construction, and can prevent the above-mentioned problem which arises from the contact of a wall and reinforcement during construction.

Moreover, in the said structure of this invention, the said reinforcing material may be provided in the side which receives relatively large pressure of the said wall body.

According to such a structure, since the reinforcement is provided on the side of the surface receiving relatively large pressure (earth pressure, water pressure), both the wall body and the reinforcement receive pressure. In this case, the load acts on the wall in the direction of separation from the reinforcement. Here, since the head of the wall and the head of the reinforcement are connected, the load is transmitted between the wall and the reinforcement (transmission of tensile force), so the load can be shared by the wall and the reinforcement. . Therefore, even if the reinforcement is arranged on the side of the wall body that receives relatively high pressure, it is possible to sufficiently improve the strength by combining the reinforcement with the wall. Moreover, when using a steel wall as a revetment, a soil and water conservation wall, etc., for example, a reinforcing material is arrange|positioned on the back side. Therefore, on the exposed side of the upper part of the steel wall, only the side surface of the wall body is exposed and the reinforcement is hidden, so that a steel wall with an uncomplicated appearance and excellent aesthetics is formed.

Moreover, in the said structure of this invention, the said reinforcing material may be provided in the side opposite to the side which receives relatively large pressure of the said wall body.

According to such a structure, since the said reinforcing material is provided in the side of the wall body opposite to the side receiving relatively large pressure, earth pressure and water pressure act on the wall body. In this case, the load is transmitted from the wall (transmits compressive force) to the reinforcement at the connecting portion of the wall and the reinforcement, and the wall and reinforcement can bear the earth pressure and water pressure in a shared manner. In addition, when using as a revetment, a soil and water conservation wall, etc., the reinforcement is arrange|positioned at the front side of a wall body, ie, the upper part exposure side. Therefore, for example, excavation is not required to expose the head of the reinforcing member during construction, and the exposed reinforcing member and the connection portion between the reinforcing member and the wall can be easily repaired.

The effect of the invention

According to the present invention, the same high waterproof performance as that of the conventional steel sheet pile wall can be obtained, and the bending moment generated in the wall body can be reduced by transmitting the load to the reinforcement. Moreover, although it is the structure which combined a steel sheet pile, a steel pipe, or an H-shaped steel, since the steel sheet pile, a steel pipe, or an H-shaped steel can be constructed individually, construction can be performed easily.

Description of drawings

Fig. 1 is a schematic plan view showing a steel wall according to a first embodiment of the present invention.

Fig. 2 is a schematic plan view showing a main part of the steel wall according to the first embodiment.

Fig. 3 is a schematic cross-sectional view showing the steel wall according to the first embodiment in the foundation.

Fig. 4 is a schematic plan view showing a steel wall according to a modified example of the first embodiment of the present invention.

Fig. 5 is a schematic plan view showing a main part of a steel wall according to a second embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view showing the steel wall according to the second embodiment in the foundation.

Fig. 7 is a schematic plan view of main parts showing a steel wall according to a third embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view showing the steel wall according to the third embodiment in the foundation.

Fig. 9 is a schematic plan view showing a main part of a steel wall according to a fourth embodiment of the present invention.

Fig. 10 is a schematic plan view of main parts showing a steel wall according to a fifth embodiment of the present invention.

Fig. 11 is a schematic plan view showing a steel wall according to a modified example of the fifth embodiment of the present invention.

12 is a schematic plan view of main parts of a steel wall showing another modified example of the fifth embodiment of the present invention.

Explanation of reference signs

1. Hat-type steel sheet pile (steel sheet pile); 1d, joint; 2. Steel pipe (reinforcement); 3. Steel wall; 5. Cover; 8. Steel plate; 9. H-shaped steel (reinforcement); 31. Steel Wall; 32, steel wall; 33, steel wall; 34, steel wall; 34A, steel wall.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 3 , steel wall 3 according to the first embodiment of the present invention is configured by combining hat-shaped steel sheet pile 1 and steel pipe (reinforcing material) 2 which are steel sheet piles. A plurality of steel pipes 2 are arranged in parallel at intervals along the longitudinal direction of a wall (sheet pile wall) 4 formed by connecting a plurality of hat-shaped steel sheet piles 1 .

The hat-shaped steel sheet pile 1 includes: a web 1a; a pair of flanges 1b extending obliquely from both side edges of the web 1a so as to expand from each other; a pair of arms 1c extending from the top ends of the left and right flanges 1b. Extending left and right parallel to the web 1a; and a joint 1d provided at the top end of the arm 1c.

In addition, the hat-shaped steel sheet pile 1 and the steel pipe 2 are not in contact, and are in a state where a gap is provided between the hat-shaped steel sheet pile 1 and the steel pipe 2 . Moreover, the diameter of the steel pipe 2 is smaller than the width (effective width) of the hat-shaped steel sheet pile 1. This steel pipe 2 is in a state in which a part of the steel pipe 2 has entered a recess that is a valley portion on one side surface of the wall body constituted by the hat-shaped steel sheet pile 1 .

A plurality of hat-shaped steel sheet piles 1 are arranged in a row by connecting joints 1d to each other, and the above-mentioned wall body 4 as a steel sheet pile wall is constructed. In addition, the hat-shaped steel sheet pile 1 and the steel pipe 2 are driven into the foundation.

As shown in FIGS. 2 and 3 , in this steel wall 3 , the head of the wall body 4 formed by the hat-shaped steel sheet pile 1 and the head of the steel pipe 2 are connected by a cover 5 . That is, the cover 5 is provided with concrete laid to cover the head of the wall body 4 and the head of the steel pipe 2 . When the head of the wall body 4 and the head of the steel pipe 2 penetrate into the concrete that becomes the cover 5, the head of the wall body 4 and the head of the steel pipe 2 are connected and fixed.

In addition, the upper end opening of the steel pipe 2 is closed by the concrete of the cover 5 . The cover 5 is provided along the longitudinal direction of the wall body 4 , and all the steel pipes 2 are connected to the wall body 4 by the cover 5 having the same length as the length of one wall body 4 .

In addition, the steel pipe 2 is arranged on the side opposite to the side where the earth pressure is applied with respect to the wall body 4 , that is, on the front side of the side where the earth pressure is not applied.

In addition, the steel wall 3 of this example serves as a revetment, for example, in which the foundation surface b on the lower side is the water side of a sea, a lake, a river, or the like with respect to the foundation surface a on the higher side. In addition, the steel wall 3 is not limited to bank protection, and can be used for soil and water conservation, cofferdams, filling, embankments, and the like.

Between the steel pipe 2 and the wall 4 formed by the hat-shaped steel sheet pile 1, when the wall 4 (hat-shaped steel sheet pile 1) and the steel pipe 2 are separately constructed, the wall 4 and the steel pipe 2 are constructed. Intervals of the degree not to touch. That is, there is an interval of the following degree, so that the wall body 4 constructed later does not contact the steel pipe 2 constructed earlier during construction, or the steel pipe 2 constructed later does not contact the wall body constructed earlier. 4 contacts. Specifically, it is preferable that the distance between the parts of the wall body 4 and the steel pipe 2 closest to each other during construction is 50 mm or more. In addition, the above interval may be 60 mm or more, 70 mm or more, or 80 mm or more. However, in consideration of the cost for connecting the head of the wall 4 and the head of the steel pipe 2, the overall thickness of the steel wall, etc., at least a part of the steel pipe 2 enters into the repeated concavities and convexities of the wall 4 (peaks and Valley) in the concave portion of the valley side of the corrugated sheet pile wall.

By forming a structure in which the steel pipe enters the concave portion of the wall, the steel sheet pile 4 of the steel sheet pile wall already built and the steel pipe that has been driven can be held and the steel pipe 2 can be hydraulically pressed or rotated. In order to obtain a reaction force from the steel sheet pile wall or steel pipe that has already been built, and press in hydraulic pressure or rotationally press in the steel pipe, it is preferable that the steel pipe is placed as close as possible to the steel sheet pile wall or steel pipe that has already been built for stable construction. .

In this case, for example, the depth of the recess (the distance between the web 1a and the arm 1c in the direction perpendicular to the web 1a and the arm 1c) varies depending on the model of the hat-shaped steel sheet pile 1, for example, in In the case of a hat-shaped steel sheet pile with a width of 900 mm, the depth of the concave portion is about 200 mm to 300 mm. Therefore, it is preferable to set the distance between the web 1 a of the hat-shaped steel sheet pile 1 of the wall 4 and the steel pipe 2 to its below the depth of the recess.

Next, a construction method of the steel wall 3 will be described.

In the construction of the steel wall 3, the hat-shaped steel sheet pile 1 which comprises the wall body 4, and the steel pipe 2 which becomes a reinforcing material are each driven individually in a foundation.

At this time, the hat-shaped steel sheet pile 1 may be firstly driven into the foundation, or the steel pipe 2 may be firstly driven into the foundation. In addition, it may be the case that the wall body 4 is a steel sheet pile wall that was originally drilled, and steel pipes are drilled for the purpose of reinforcing the wall body 4 or the like.

In addition, the process of driving the hat-shaped steel sheet pile 1 while sequentially connecting the hat-shaped steel sheet pile 1 to the previously installed hat-shaped steel sheet pile 1 and sequentially driving the steel pipes 2 by arranging the steel pipes 2 may be performed in parallel. engineering.

In addition, in the process of driving the hat-shaped steel sheet pile 1, the hydraulic press-fitting construction method that obtains the reaction force from the hat-shaped steel sheet pile 1 pressed in earlier to press the hat-shaped steel sheet pile 1 may be used, or vibration may be used. The hammer construction method can also be excavated with an auger when drilling.

In the process of press-fitting the steel pipe 2, the same construction method as that of the hat-shaped steel sheet pile 1 can be adopted. In addition, in the case of the steel pipe 2, a rotary press-fit construction method and a mid-cut construction method in which the foundation is excavated from the steel pipe 2 and the steel pipe 2 is pressed in can also be employed.

In addition, it is also possible to hold the steel sheet pile 1 of the steel sheet pile wall that has already been built and the steel pipe that has already been laid, and press in the steel pipe 2 with oil pressure or rotary pressure. At this time, since the steel pipe enters the concave portion of the wall, the position of the steel sheet pile wall for obtaining the reaction force, the steel pipe, and the steel pipe to be constructed become close, and stable construction can be performed.

In the case of the steel wall 3, since the wall 4 as the sheet pile wall and the steel pipe 2 as the reinforcing member are separated from each other during construction, for example, they are laid on the foundation at a distance of 50 mm or more. Vibration, noise and deformation caused by sliding of the wall body 4 and the steel pipe 2 during construction can be suppressed.

In addition, when the wall body 4 and the steel pipe 2 are in contact during construction, for example, if a vibratory construction method or a rotary press-fit construction method is adopted to vibrate the members to be installed during construction, the above-mentioned noise and vibration will , the possibility of deformation becomes high. Therefore, usable construction methods are limited. On the other hand, in this embodiment, since the wall body 4 and the steel pipe 2 are separated during construction, the selection of construction methods is wide.

Moreover, when a steel sheet pile and a reinforcing material were joined and integrated, the cross-sectional area of the member driven into the foundation becomes large, and it becomes difficult to drive. On the other hand, the steel wall 3 of this embodiment can be easily constructed because the wall body 4 and the steel pipes 2 are installed separately. In addition, since the wall body 4 and the steel pipe 2 are separated during construction without contact, construction is further facilitated compared to the case where the wall body 4 and the steel pipe 2 are in contact as described above.

After the steel sheet pile 1 (wall body 4 ) and the steel pipe 2 have been driven, concrete to be the cover 5 is driven so as to straddle the wall body 4 and the steel pipe 2 . Thus, the head of the wall body 4 and the head of the steel pipe 2 are connected.

In this steel wall 3, since the head of the wall 4 and the head of the steel pipe 2 are connected, the load can be transmitted between the wall 4 and the steel pipe 2 through the connecting portion, and the wall 4 and the steel pipe 2 can be connected together. Share the earth pressure and water pressure that the steel wall 3 is subjected to. In addition, since the head of the wall body 4 and the head portion of the steel pipe 2 are connected, displacement in the vertical direction between the steel pipe 2 and the wall body 4 can be prevented. As described above, the steel wall 3 can reduce the bending moment generated in the wall body 4 reinforced with the steel pipe 2 compared with a single steel sheet pile wall. In addition, the watertightness of the steel wall 3 can be the same as that of the steel sheet pile wall, and the same level of watertightness as that of the steel pipe sheet pile wall filled with mortar at the joint portion can be obtained without filling the joint 1d with mortar.

In this embodiment, as shown in FIG. 3 , in the steel wall 3 , the steel pipe 2 is arranged on the opposite side of the wall body 4 to which the earth pressure is applied, that is, on the front side of the side to which the earth pressure is not applied. Therefore, in the case of reinforcing the existing steel sheet pile wall, even if there is an obstacle in the ground part or the middle part of the back side, steel pipes can be installed on the front side and reinforced. Furthermore, even in the case of reinforcing with steel pipes of the same length, compared with the case of installing on the back side, the length to be driven into the soil becomes shorter, and construction labor, time, and cost can be reduced.

In this embodiment, the steel wall 3 is used as a revetment, and the head of the steel pipe 2 and the head of the wall body 4 are connected by a cover 5 . Therefore, the cover 5 is a link between the head of the steel pipe 2 and the head of the wall 4 , and also has a function of closing the opening of the steel pipe 2 . In this form, since a dedicated connecting member such as a tie rod is not necessarily required, cost reduction can be achieved.

In the steel wall 3 of this embodiment, the length of the steel pipe 2 is longer than the vertical length of the wall body 4 (the length of the hat-shaped steel sheet pile 1). By increasing the length of the relatively rigid steel pipe 2 , a free design can be performed in which the steel pipe 2 bears the earth pressure and the wall 4 functions to prevent the outflow of soil and sand. Thereby, steel weight and construction cost can be reduced. For example, it is also possible to make the steel pipe 2 longer than the wall body 4 and only drive the steel pipe 2 into the supporting layer.

In addition, as will be described later, the length of the steel pipe 2 may be shorter than the vertical length of the wall body 4 , or the length of the steel pipe 2 may be equal to the vertical length of the wall body 4 . The length of the steel pipe 2 is determined according to rigidity and foundation conditions. In addition, if the vertical length of the wall body 4 is about the same as the length of the steel pipe 2, quicksand, bumps, and arc sliding may occur, the vertical length of the wall body 4 may be formed longer than the length of the steel pipe 2. In addition, the wall body 4 may be longer than the steel pipe 2 in order to stop groundwater.

In this embodiment, as shown in FIG. 1, the steel pipe 2 is arrange|positioned for each hat-shaped steel sheet pile 1 of the wall body 4 (every recessed part of the wall body 4). However, depending on the required strength, it is not necessary to arrange the steel pipe 2 for all the hat-shaped steel sheet piles 1 . For example, steel pipes 2 may be arranged every other hat-shaped steel sheet pile 1 (every two recesses) as shown in FIG. configuration. Since the reinforcing material enters the concave portion of the wall body, even if the steel pipes are not arranged in all the hat-shaped steel sheet piles 1, the effect of the reinforcing material can be produced on the adjacent steel sheet piles. However, it is preferable that the steel pipes 2 are arranged substantially uniformly in a state where the steel pipes 2 are arranged along the longitudinal direction of the wall body 4 .

The steel sheet pile which comprises the wall body 4 is not limited to the hat-shaped steel sheet pile 1, Various steel sheet piles, such as a U-shaped steel sheet pile and a Z-shaped steel sheet pile, can be employ|adopted.

Next, a second embodiment of the present invention will be described.

As shown in FIGS. 5 and 6 , the steel wall 31 of the second embodiment uses a steel support member (for example, a steel plate cut to a predetermined length, shaped steel) 6 as a connecting member and a cover 5 to hold the steel pipe 2 together. The head link of head and body of wall 4. In addition, the length of the steel pipe 2 and the vertical length of the wall body 4 are made the same. Other than that, it has the same structure as the steel wall 3 of 1st Embodiment. Therefore, the same reference numerals are assigned to the same constituent elements as those of the first embodiment, and description thereof will be omitted.

In 2nd Embodiment, the support material 6 (steel material) made of steel which is a connection member is provided in the state sandwiched between the head part of the steel pipe 2 and the head part of the wall body 4. As shown in FIG. The supporting member 6 is fixed to the steel pipe 2 and the wall 4 by, for example, welding, bolts, self-drilling screws and the like. As a result, the head of the steel pipe 2 and the head of the wall 4 are connected in a state where the steel pipe 2 and the wall 4 are separated.

In addition, in 2nd Embodiment, the length of the steel pipe 2 and the up-and-down length of the wall body 4 (the length of the hat-shaped steel sheet pile 1) are substantially the same as mentioned above.

The construction method of the steel wall 31 of 2nd Embodiment is as follows.

First, the steel sheet pile 1 and the steel pipe 2 are driven in the same manner as in the first embodiment. Next, the steel material to be the support 6 is placed between the steel sheet pile 1 (wall 4 ) and the steel pipe 2 , and fixed to the steel sheet pile 1 (wall 4 ) and steel pipe 2 by welding, bolts, self-drilling screws, and the like. Then, similar to the first embodiment, a cover is drilled across the wall body 4 and the steel pipe 2 .

In the steel wall 31 of the second embodiment, the head of the steel pipe 2 and the head of the wall body 4 are connected by both the cover 5 and the support 6 . Thereby, the load borne by the wall body 4 can be more reliably transmitted to the steel pipe 2 . In addition to obtaining this effect and the effect based on the steel pipe 2 and the hat-shaped steel sheet pile 1 having the same length, the same operation and effect as the steel wall 3 of the first embodiment can be obtained.

Next, a third embodiment of the present invention will be described.

As shown in Fig. 7 and Fig. 8, the steel wall 32 of the third embodiment not only uses the cover 5 to connect the head of the steel pipe 2 and the head of the wall 4, but also uses a pair of plate materials 7 as connecting members to connect the steel pipes. 2 head and wall 4 head. Moreover, the vertical length of the wall body 4 is longer than the length of the steel pipe 2 . In addition, the steel pipe 2 is disposed on the back side of the wall body 4 to which earth pressure is applied. Other than that, it has the same structure as the steel wall 3 of 1st Embodiment. Therefore, the same symbols are assigned to the same constituent elements as those of the first embodiment, and description thereof will be omitted.

In the third embodiment, the steel plate 7 is provided in a state of being sandwiched between the head of the steel pipe 2 and the head of the wall body 4 . In addition, the plates 7 are respectively fixed to the steel pipe 2 and the wall 4 by welding, bolts or the like. In addition, in the state where the steel pipe 2 and the wall body 4 are separated, the head of the steel pipe 2 and the head of the wall body 4 are connected. And straddle the head of the steel pipe 2 connected by the plate 7 and the head of the wall 4, wrap the head of the steel pipe 2 and the head of the wall 4 with concrete to set the cover 5, thus the head of the steel pipe 2 and the head of the wall 4 The head of the body of wall 4 is also connected by a cover 5 .

In addition, in the third embodiment, the vertical length (the length of the hat-shaped steel sheet pile 1 ) of the wall body 4 is longer than the length of the steel pipe 2 as described above. Thereby, it is possible to prevent quicksand, uplift, arc sliding or to stop groundwater. In addition, the strength of the connection portion between the head of the steel pipe 2 and the head of the wall body 4 can be increased by connecting with the plate material 7 in addition to the connection by the cover 5 . In particular, in this structure, since a tensile load acts between the wall body 4 and the steel pipe 2, the connection by the steel plates 7 is more effective.

Moreover, since the steel pipe 2 can be hidden without being exposed to the front side of the wall 4 by providing the steel pipe 2 on the back side of the wall body 4, the appearance of the steel wall 32 can be improved.

The steel wall 32 of the third embodiment can achieve the same effect as that of the first embodiment in addition to the effects based on the structure of the connecting portion, the length of the steel pipe 2 and the wall 4, and the arrangement of the steel pipe 2 with respect to the wall 4. same effect.

Next, a fourth embodiment of the present invention will be described.

As shown in FIG. 9 , the steel wall 33 of the fourth embodiment has H-shaped steel 9 instead of the steel pipe 2 as a reinforcing member, and the other structures are the same as those of the steel wall 3 of the first embodiment. Therefore, the same symbols are assigned to the same constituent elements as those of the first embodiment, and description thereof will be omitted.

The steel wall 33 of the fourth embodiment employs the H-shaped steel 9 as a reinforcement. The H-shaped steel 9 is arranged in a row at intervals along the longitudinal direction of the wall body 4 formed by connecting the hat-shaped steel sheet piles 1 , as in the case of the steel pipes 2 of the first embodiment. In addition, a gap is provided between the H-shaped steel 9 and the wall body 4 in the same manner as in the case of the steel pipe 2 of the first embodiment.

Moreover, the H-shaped steel 9 is the state which entered the recessed part of the valley part which is one side surface of the wall body comprised with the hat-shaped steel sheet pile 1 partly. In addition, the H-shaped steel 9 is arranged so that the web 9 a is perpendicular to the longitudinal direction of the wall body 4 . Thus, the flange 9b is parallel to the length direction of the wall 4 .

The head of this body of wall 4 is connected with the head of H-shaped steel 9. The connection method of the steel wall 33 and the H-shaped steel 9 as a reinforcing material can be the same as that of the first to third embodiments. That is, the wall body 4 and the H-shaped steel 9 are connected by the cover 5 . In addition, the wall body 4 and the H-shaped steel 9 may also be connected by welding or bolt connection by means of steel materials. In addition, it is also possible to connect the head of the wall body 4 and the head of the H-shaped steel 9 by combining these connection methods.

In addition to the H-shaped steel 9 replacing the steel pipe 2 as a reinforcement, the relationship between the length of the wall 4 and the length of the H-shaped steel 9, the configuration of the H-shaped steel 9 relative to the wall 4 (including the interval between the wall 4 and the H-shaped steel 9), etc. The structure can be the same as that of the first to third embodiments.

In the construction method of the steel wall 33, except that the H-shaped steel 9 cannot be constructed by the mid-cut construction method or the rotary press-in construction method, it is possible to adopt the same method as the steel wall of the first embodiment to the third embodiment. The same construction method as the construction method.

The steel wall 33 of the fourth embodiment can obtain the same function and effect as the steel wall 3 of the first to third embodiments, except for the function and effect of the steel pipe 2 .

Next, a fifth embodiment of the present invention will be described.

As shown in FIG. 10 , in the steel wall 34 according to the fifth embodiment, in each of the above-mentioned embodiments, the head of the steel pipe 2 and the head of the wall body 4 are connected by welding the steel plate 8 . Concrete is not used for the connection between the head of the steel pipe 2 and the head of the wall 4 . The structure other than the connection structure between the head part of this steel pipe 2 and the head part of the wall body 4 is the same structure as the steel wall 3 of 1st Embodiment. Therefore, the same symbols are assigned to the same components, and descriptions thereof are omitted.

Similar to the first embodiment, in the steel wall 34 of the fifth embodiment, a plurality of steel pipes 2 are separated from each other along the longitudinal direction of a wall (sheet pile wall) 4 formed by connecting a plurality of hat-shaped steel sheet piles 1 . They are arranged in a row at intervals. Moreover, the steel pipe 2 is arrange|positioned in the state which entered the recessed part of the wave-shaped steel sheet pile 1 which repeats unevenness|corrugation partly.

The steel plate 8 is arrange|positioned between the hat-shaped steel sheet pile 1 of the wall body 4, and the steel pipe 2. In this embodiment, the steel plate 8 is arrange|positioned between the arm 1c of the hat-shaped steel sheet pile 1, and the outer periphery of the steel pipe 2. As shown in FIG. The steel plate 8 is corresponded to the arm 1c on either side, and is provided one each on the left and right with respect to one hat-shaped steel sheet pile 1 and one steel pipe 2, respectively.

Moreover, one end part of the steel plate 8 is welded to the arm 1c of the hat-shaped steel sheet pile 1, and the other end part is welded to the outer periphery of the steel pipe 2. As shown in FIG.

In the construction of the steel wall 34, the construction of the wall body 4 and the drilling of the steel pipe 2 are performed in the same manner as in the first embodiment. After the construction of the wall body 4 and the laying of the steel pipe 2 are completed, the steel plate 8 is welded to the hat-shaped steel sheet pile 1 and the steel pipe 2 of the wall body 4 .

In the steel wall 34 of the fifth embodiment, since the wall body 4 and the heads of the steel pipes 2 are connected by the welded steel plate 8, construction becomes easy. In addition, unlike the case of concrete connection, a curing period is not required, so the construction period is short.

In addition, in this embodiment, as shown in FIG. 11, the steel plate 8 may be arranged between the web 1a of the hat-shaped steel sheet pile 1 and the outer peripheral surface of the steel pipe 2, or may be arranged between the flange 1b and the steel pipe 2. between the peripheral surfaces.

In addition, the steel pipes 2 may be arranged relative to the hat-shaped steel sheet piles 1 by skipping the distance between the steel pipes 2 (for example, the steel pipes 2 are arranged every one or more hat-shaped steel sheet piles 1). Steel pipe 2 of effective width of pile 1.

In addition, the steel pipe 2 may be arranged on the side of the wall body 4 that receives a relatively high pressure, or may be arranged on the opposite side.

In addition, as shown in the steel wall 34A shown in FIG. 12, in addition to connecting by welding the steel plate 8, it is also possible to use the head of the wall body 4 and the head of the steel pipe 2 to enclose the head of the wall 4 and the head of the steel pipe 2 similarly to the first embodiment. The concrete that is set is used to set the cover 5 . In this case, the concrete is laid after the steel plate 8 is welded.

In addition, the wall body 4 and the steel pipe 2 are not only connected by the welded steel plate 8 but also connected by concrete.

In this case, for example, a complementary structure can be formed such that concrete mainly transmits compressive force between wall body 4 and steel pipe 2 , and steel plate 8 mainly transmits tensile force. In addition, the above-mentioned sealing of the upper end opening of the steel pipe 2 with concrete, the prevention of the collapse of the tip, and the like can be realized.

Alternatively, the existing steel sheet pile wall may be used as the wall body 4, and the steel wall 3, 31, 32, 33, 34, 34A may be constructed by laying steel pipes 2 and H-shaped steel 9 on the wall body 4. .

Claims (6)

1. A method for manufacturing a steel wall, the steel wall comprising: a wall body that is repeatedly concave-convex in the length direction in the shape of a corrugated plate by connecting a plurality of steel sheet piles with joints; A plurality of reinforcing members formed of steel pipes having joints for fitting, the manufacturing method is characterized in that, The manufacturing method includes: The reinforcing member is spaced apart from the wall along the length direction of the wall so that a part of the reinforcing member enters the recess of the wall and the wall and the reinforcing member are not in contact during construction. Parallel setting; By connecting the wall body and the reinforcement member only at the head portion, the load is transmitted between the wall body and the reinforcement member, and vertical misalignment of the wall body and the reinforcement member is restricted. 2. The manufacturing method according to claim 1, characterized in that, The distance between the wall body and the steel pipe when they are closest to each other is 70 mm or more and 300 mm or less. 3. The manufacturing method according to claim 1, characterized in that, The said reinforcing material is provided every one or several said steel sheet piles every other. 4. The manufacturing method according to claim 1, characterized in that, The wall body and the reinforcement member are connected at the head portion by concrete laid across the head portion of the wall body and the reinforcement member. 5. The manufacturing method according to claim 1, characterized in that, The wall body and the reinforcement member are connected at the head by welding steel plates provided between the wall body and the reinforcement member to the wall body and the reinforcement member, respectively. 6. The manufacturing method according to claim 1, characterized in that, The pitch L of the reinforcements and the wall height H of the wall satisfy: L≦4H/7.