JP2012207371A - Method for installing steel sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for installing a steel sheet pile which can install a long steel sheet pile at a low cost and accurately without using a modified steel sheet pile and is hardly affected by meteorological and marine conditions.SOLUTION: When a plurality of permanent steel sheet piles 1,1... are driven into a foundation A so that the lengthwise direction is directed in the vertical direction and that the permanent steel sheet piles are arranged adjacent to each other in the width direction, a guiding steel sheet pile 2 shorter than the permanent steel sheet pile 1 is driven into a position in the foundation A into which the permanent steel sheet pile 1 is planned to be driven, directing the lengthwise direction in the vertical direction. Thereby guide holes 6,6... directed in the vertical direction are formed, after which the guiding steel sheet pile 2 is withdrawn, and in place of the withdrawn guiding steel sheet pile 2, the lower end side of the permanent steel sheet pile 1 is inserted in the guide hole 6 and installed, and the permanent steel sheet pile 1 is driven into a prescribed depth of the foundation A.

Description

  The present invention relates to a steel sheet pile driving method for driving a long steel sheet pile used for a quay wall, a retaining wall of a revetment, and the like into a ground.

  Conventionally, riverbanks, coasts, harbor quay walls and revetment structures have been known to have steel sheet pile walls in which a plurality of steel sheet piles oriented in the vertical direction are arranged side by side in the width direction. As a method for placing a plurality of steel sheet piles side by side on the ground, there are known a construction method by single punching and a method of constructing steel sheet piles arranged side by side in the width direction by multi-stage driving (folding screen multi-stage driving). Patent Document 1).

  In the construction method by single hammering, first, one or two steel sheet piles are installed along the guide frame, and after it is driven to a predetermined depth in the ground by a pile driver or pile driver, the next steel sheet pile is Is installed adjacent to the existing steel sheet pile, and one side edge is guided to the existing steel sheet pile while driving to a predetermined depth in the ground, and this operation is repeated sequentially for each steel sheet pile. These steel sheet piles are arranged side by side in the width direction.

  Further, in this method, since the steel sheet pile is driven in a state in which only one side edge of the steel sheet pile is guided, the steel sheet pile is inclined and is easily driven. Therefore, a wedge-shaped deformed steel sheet pile is formed at the end portion or the central portion of the sheet pile wall. The gap between steel sheet piles is filled and the inclination is corrected.

  On the other hand, in the method of placing steel sheet piles using folding screen multi-stage driving, a guide frame is installed between the upper ends of steel pipe sheet piles placed at a predetermined interval, and a plurality of steel sheet piles are arranged in the width direction along the guide frame. After placing the steel sheet piles on both ends, a predetermined amount of steel sheet piles are driven in, and the steel sheet piles arranged between both ends are guided to each other according to the driven steel sheet piles and driven to the same depth. This operation is repeated several times while making adjustments, and the steel sheet piles are guided to each other and are driven until the whole reaches a predetermined depth.

JP-A-6-294127

  However, the conventional method of single-handed construction as described above has a problem that a wedge-shaped deformed steel sheet pile has to be produced at the construction site in accordance with the inclination of each steel sheet pile, resulting in difficulty in production.

  In particular, it is difficult to produce a long deformed steel sheet pile, and warping and bending at the time of production affect the placement accuracy.

  On the other hand, the multi-stage construction method has a problem that a large-scale installation device and a guide frame are required to install a plurality of long steel sheet piles side by side, which increases costs.

  In addition, in construction by multi-stage driving, each steel sheet pile is driven in several times while making adjustments in order to place each steel sheet pile uniformly and accurately, so there are several pile driving machines (or pile driving ships). There was a problem that it was necessary to move it over time, the construction period was prolonged, and the cost was increased.

  Furthermore, in the state where the steel sheet pile was driven halfway during the work at sea, while the other steel sheet pile was being driven, most of the upper part of each other sheet pile was on the water surface. Because it is left in a protruding state, it is susceptible to wind waves and is subject to weather and sea conditions. In particular, long steel sheet piles have a long protruding part on the surface of the water. There was a problem that the influence was great.

  Furthermore, common to both construction methods, when installing a steel sheet pile for the first time, it is difficult to align the direction of the steel sheet pile with respect to the ground in the vertical direction. If the steel sheet pile is low, there is a problem in that it affects the precision of the steel sheet pile to be cast later, and the longer the steel sheet pile is, the more difficult this alignment is.

  Therefore, in view of the conventional problems as described above, the present invention can place a long steel sheet pile inexpensively and accurately without using a deformed steel sheet pile, and is hardly affected by weather and sea conditions. It was made for the purpose of providing a placement method.

  The feature of the invention described in claim 1 for solving the conventional problems as described above and achieving the intended purpose is that a plurality of steel sheet piles are oriented in the vertical direction and in the width direction. In the method of placing steel sheet piles that are driven into the ground in positions adjacent to each other, guide steel sheet piles shorter than the steel steel sheet piles at the planned placement positions of the steel steel sheet piles in the ground in the vertical direction. Then, a guide hole directed in the vertical direction is formed by driving in, and then the guide steel sheet pile is pulled out, and the lower end side of the main steel sheet pile is placed in the guide hole instead of the extracted guide steel sheet pile. It is to insert and install, and to drive the installed steel sheet pile to a predetermined depth in the ground.

  The invention according to claim 2 is characterized in that, in addition to the configuration of claim 1, a plurality of guide steel sheet piles are arranged side by side in the width direction and driven into the ground while guiding the guide steel sheet piles to each other. After that, the steel sheet pile for guide is pulled out and the steel sheet pile for guide is installed instead of the steel sheet pile for guide.

  According to a third aspect of the present invention, in addition to the structure of the second aspect, a part of the plurality of guide steel sheet piles driven in parallel in the width direction is extracted, and the book is replaced with the extracted guide steel sheet pile. The installation steel sheet pile is inserted into the guide hole while being guided by the main steel sheet pile or guide steel sheet pile arranged on both sides of the drawn steel sheet pile for guide. is there.

  As described above, the steel sheet pile driving method according to the present invention is a steel sheet pile that is driven into the ground in an arrangement adjacent to each other in the width direction while directing the length direction of the plurality of steel sheet piles in the vertical direction. In the placing method, a guide hole directed in the vertical direction is formed by driving a steel sheet pile for guide shorter than the permanent steel sheet pile in the planned placement position of the permanent steel sheet pile in the ground with the length direction thereof directed in the vertical direction. Then, the guide steel sheet pile is pulled out, and the lower end side of the permanent steel sheet pile is inserted into the guide hole in place of the extracted guide steel sheet pile, and the installed steel sheet is installed. By driving the sheet pile to a predetermined depth in the ground, it is possible to accurately drive long steel sheet piles without being multi-staged, shortening the construction period and reducing costs, and wedge-shaped deformed steel sheet piles Tilt using It can be necessary to carry out modifications to the construction without relying on skilled workers without. Further, according to the method of the present invention, since the permanent steel sheet pile can be installed while being guided by the guide hole, even the long and heavy permanent steel sheet pile can be easily positioned. Furthermore, the method according to the present invention does not leave the steel sheet piles protruding from the water over a long period of time, unlike the folding screen, and is less affected by weather and sea conditions.

  Further, in the present invention, a plurality of the guide steel sheet piles are arranged side by side in the width direction, and the guide steel sheet piles are driven into the ground while guiding each other, and then the guide steel sheet piles are pulled out. By installing the steel sheet piles instead of the steel sheet piles, the steel sheet piles for guides are short, so the steel sheet piles are short. Since it can be driven in a small number of times, it is possible to reduce the movement of the pile driving machine and shorten the construction period. On the other hand, since high driving accuracy is obtained, the inclination of the guide hole that guides the steel sheet pile The steel sheet pile can be driven with a high driving accuracy.

  Further, in the present invention, a part of the plurality of guide steel sheet piles driven in parallel in the width direction is pulled out, the main steel sheet pile is replaced with the pulled-out guide steel sheet pile, and both side edges of the guide are pulled out. By installing the steel sheet pile in the guide hole while being guided by the steel sheet pile or the guide steel sheet pile arranged on both sides of the steel sheet pile, no large-scale equipment is required. In addition, the pile driving machine can be driven by single driving without having to move the pile driver several times. On the other hand, by guiding both side edges, high driving accuracy can be obtained as in the case of multi-stage driving.

It is a front view which shows the outline of an example of the steel sheet pile driving process for guides in the driving method of the steel sheet pile which concerns on this invention. It is a front view which shows the outline of the drawing-out process of the steel sheet pile for a guide same as the above. It is a front view which shows an example of the installation state of a permanent steel sheet pile same as the above. It is a top view which shows the connection state of the steel sheet pile in FIG. It is a front view which shows the state of the driving | running process of the permanent steel sheet pile in the driving method of the steel sheet pile concerning this invention.

  Next, an embodiment of a steel sheet pile driving method according to the present invention will be described based on the examples shown in FIGS. In the figure, reference numeral A is a water bottom ground, reference numeral 1 is a permanent steel sheet pile placed on the bottom bottom ground A, and reference numeral 2 is a steel sheet pile for guide.

  The steel sheet pile 1 has a length of 25 m or more and is formed in a shape in which a U-shaped (mountain-shaped) cross section is continuous in the length direction. Joint members 3a and 3a for connecting the side edges are formed.

  The steel sheet pile for guide 2 has the same cross-sectional shape as the permanent steel sheet pile 1, and its length is shorter than the long steel sheet pile 1 (31 m in this embodiment). Joint members 3 a and 3 a having the same shape as the main steel sheet pile 1 are formed on both side edges. In addition, in the Example in a figure, the thing of about 1/2 length of this installation steel sheet pile 1 is used.

  The joint 3 used for the steel sheet pile 1 for this construction and the steel sheet pile 2 for a guide is connected by engaging the joint members 3a and 3a formed on the adjacent steel sheet pile side edges with each other, and the engaged state. The steel sheet piles are formed so that they can slide with each other in the length direction of the steel sheet piles.

  In order to drive this permanent steel sheet pile 1, first, the guide frame 5 is installed between the upper ends of the steel pipe sheet piles 4, 4 to form steel sheet pile installation means. In addition, this steel sheet pile installation means is small compared with the steel sheet pile installation means in the case of placing a steel sheet pile of the same scale as the main steel sheet pile 1 by folding screen multi-stage driving.

  Next, as shown in FIG. 1, a plurality of guide steel sheet piles 2,... Along the guide frame 5 on the ground A according to the planned driving position of the steel sheet pile 1. Are installed side by side in the width direction. At that time, the joint portions of the adjacent guide steel sheet piles 2 and 2 are connected to each other through a joint 3 so as to be slidable in the vertical direction, and each of the guide steel sheet piles 2, 2. With respect to each other.

  Since the guide steel sheet pile 2 is shorter and lighter than the main steel sheet pile 1, the guide steel sheet pile 2 is installed in the vertical direction with respect to the ground. For example, it is easy to perform operations such as aligning the joint members 3a and 3a of the adjacent guide steel sheet piles 2 and 2 with each other.

  When the installation work of the plurality of guide steel sheet piles 2, 2,... Is completed, the guide steel sheet pile 2 arranged on the steel pipe sheet pile 4 side is driven to a predetermined depth by a pile driving means such as a pile driving machine. In that case, the steel sheet pile 2 for a guide is made to guide one side edge part to the steel pipe sheet pile 4 to the steel sheet pile 2 for guides which adjoins the other side edge part via the coupling 3, respectively, and the length direction is changed in that state. It is designed to be driven in the vertical direction.

  Next, the guide steel sheet piles 2, 2... Arranged between the guide steel sheet piles 2, 2 that have been driven are sequentially driven to a predetermined depth while being guided by the guide steel sheet piles 2 adjacent to each other. In this case, the steel sheet piles for guide 2, 2,... Are short and can be driven to a predetermined depth in the ground without dividing the driving operation into several times or even with multiple steps. .

  The guide steel sheet piles 2, 2... Are driven to a predetermined depth so that the guide holes 6 are opened in the ground A at the planned placement positions of the steel sheet piles 1 in the vertical direction. , 6 ... are formed.

  The guide hole 6 is formed such that the cross-sectional shape of the steel sheet pile 2 for guides, that is, the cross-sectional shape of the steel sheet pile 1 is continuous in the vertical direction, and the inserted steel sheet pile 1 is inserted. It is designed to guide the vertical movement.

  Next, as shown in FIGS. 2 to 3, the guide steel sheet pile 2 is pulled upward by a crane or the like, and the main steel sheet pile 1 is guided along the guide frame 5 in place of the pulled guide steel sheet pile 2. Insert the steel sheet pile 1 into the hole 6.

  In the installation work of this permanent steel sheet pile 1, as shown in FIG. 4, one side edge is guided to the steel pipe sheet pile 4 or the existing permanent steel sheet pile 1 via the joint 3, and the other side edge is provided. Is inserted into the ground A while being guided by a guide hole 6 directed in the vertical direction having a certain depth while the adjacent guide steel sheet pile 2 is guided through the joint 3. Even the installed steel sheet pile 1 can be installed with the length direction in the vertical direction easily and accurately.

  And this installed steel sheet pile 1 is driven to a predetermined depth by a pile driving means such as a pile driving machine.

  As described above, the steel sheet pile 1 can be driven while guiding both side edges thereof to the existing steel sheet pile 1 (steel pipe sheet pile 4) and the steel sheet pile 2 for guide, and is perpendicular to the ground in the same manner as multi-stage driving. Therefore, it is difficult to incline the driving direction, and it is not necessary to use a wedge-shaped deformed steel sheet pile.

  Then, the above-described series of operations are sequentially repeated from one end side, and a plurality of permanent steel sheet piles 1, 1... The steel sheet pile walls are constructed by placing them in an adjacent arrangement.

  In addition, although the above-mentioned Example demonstrated the example which uses the steel sheet pile which has a U-shaped cross section, it is applicable also to the steel sheet pile which has another cross-sectional shape.

  In the above-described embodiment, the example in which the length of the guide steel sheet pile is about ½ the length of the permanent steel sheet pile has been described. It can be appropriately determined based on various conditions such as the length of the sheet pile.

  Further, in the above-described embodiment, the example in which the steel sheet pile for the guide is pulled out and a series of operations for installing and driving the main steel sheet pile instead is sequentially performed from one end side, but construction is simultaneously performed from both end sides. Alternatively, every other guide steel sheet pile arranged may be pulled out, and a permanent steel sheet pile may be placed instead of the pulled out guide steel sheet pile.

A Water bottom 1 Steel sheet pile 2 Guide steel sheet pile 3 Joint member 4 Steel pipe sheet pile 5 Guide frame 6 Guide hole

Claims (3)

In the method of placing steel sheet piles in which a plurality of steel sheet piles are oriented in the vertical direction in the length direction and driven into the ground in an arrangement adjacent to each other in the width direction,
A guide hole oriented in the vertical direction is formed by driving a steel sheet pile for guide shorter than the permanent steel sheet pile in the planned placement position of the permanent steel sheet pile on the ground, with its length direction directed in the vertical direction, and thereafter The guide steel sheet pile is pulled out, and the lower end side of the permanent steel sheet pile is inserted into the guide hole instead of the extracted guide steel sheet pile, and the installed permanent steel sheet pile is installed in the ground. A steel sheet pile driving method characterized by driving to a predetermined depth.   A plurality of the steel sheet piles for guides are arranged side by side in the width direction, and the steel sheet piles for guides are driven into the ground while guiding each other, and then the steel sheet piles for guides are pulled out and replaced with the steel sheet piles for guides. The method for placing a steel sheet pile according to claim 1, wherein the steel sheet pile is installed.   Pull out a part of the plurality of guide steel sheet piles that are driven side by side in the width direction, replace the pulled steel sheet pile for guide with the permanent steel sheet pile, and both sides of both sides of the guide steel sheet pile withdrawn The steel sheet pile placing method according to claim 2, wherein the steel sheet pile is installed by being inserted into the guide hole while being guided by the steel sheet pile or the guide steel sheet pile arranged in a section.

Images