JPS5947774B2 - Method for driving piles such as steel pipe sheet piles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for driving piles such as steel pipe sheet piles, and is an invention in which vertical control is performed accurately during driving of piles such as steel pipe sheet piles, and the piles are driven straight and well in the vertical direction. This is what I did.

Steel pipe sheet pile 1' such as steel pipe sheet pile wall, steel pipe sheet pile well, etc.
As shown in Figs. 1 and 2, a long joint in the axial direction, that is, a junction joint 3' is provided on the outer periphery of the steel pipe body 2'. , rectangular, etc.), and is often used as an integral foundation for revetment walls, continuous walls, or above-ground structures.

The method of construction is to connect steel pipe sheet piles one after another, and conventionally the usual method was to hammer the antibodies in with a diesel hammer or the like.

In recent years, due to problems such as vibration and noise pollution during construction work,
Attempts have been made to construct the above-mentioned steel pipe sheet piles without vibration or noise.

A push jack is used as a device for press-fitting steel pipe sheet piles without vibration, but unlike diesel hammers, etc., there is a limit to the pressing force, so when driving steel pipe sheet piles, the pile core and verticality must be precisely controlled. There is a need.

In other words, unless vertical control is performed precisely during the driving process of steel pipe sheet piles, the steel pipe sheet piles will be tilted individually, and even the entire row of steel pipe sheet piles will be tilted.Especially in the case of steel pipe sheet pile wells, the last closing pile This makes it difficult to drive the steel pipe sheet piles, resulting in the inability to close them into a ring.

In addition, when multiple steel pipe sheet piles are connected vertically (joint piles) and driven into a long length, simply welding the joint piles one after another in line with the end face of the steel pipe body will allow the steel pipe body to Due to distortions, end face errors, and errors in the installation position of long junction joints in the axial direction, and errors in Slin I, the individual upper and lower steel pipe sheet piles may become bent, which increases the frictional resistance during pouring and press-fitting. Press-fitting may become difficult and pouring may not be possible.

This is also the case with the impact method using diesel hammers, etc., and especially in the case of long steel pipe sheet piles with vertically connected piles, the vertical control during driving press-in and the vertical control during the connecting piles of the upper and lower sheet piles must be performed precisely. It goes without saying that if this is not done properly, the construction will be difficult in the same way as mentioned above.

Conventionally, as a vertical control method during driving of piles such as steel pipe sheet piles (including prefabricated piles used as foundation piles), piles such as steel pipe sheet piles erected in a specified ground are controlled in the front-back and left-right directions, for example. The vertical line on the pile axis or pile wall is visually observed using a transit from two directions perpendicular to each other (X-axis and Y-axis when viewed from above), and the pile is placed vertically while driving, but the driving progresses. As the length of the pile remaining above ground becomes shorter, visual control becomes difficult, and when installing piles in a short time, the lower part is buried underground with the upper end remaining, so the upper and lower parts must be completely straight and vertical. It was completely impossible to perform joints while maintaining the same condition.

In view of the above, the present invention facilitates and precisely performs vertical control during driving of piles such as steel pipe sheet piles.

This was invented to solve the above-mentioned drawbacks.

Next, embodiments of the present invention will be described with reference to the drawings and the equipment used, particularly in the case of driving steel pipe sheet piles.

First, the top of the steel pipe sheet pile, that is, the pile 1, which has been erected at a predetermined location, is placed in two directions perpendicular to each other, preferably in the direction of the row of steel pipe sheet piles (X
Two inclinometers 10 are installed that can electrically detect the inclination angle in the axial direction) and in the direction perpendicular to the steel pipe sheet pile row (Y-axis direction).

This inclinometer 10 is installed separately on the ground. After adjusting the zero point of the inclinometer 10, which will be described later, the inclination of the pile 1 is detected and transmitted to the indicator 11, and the indicator 11 outputs digital or analog values. Provided to be displayed as a quantity.

As a means for attaching the inclinometer 10 to the top of the pile 1, the fourth
As shown in the figure, the inclinometer 10 is provided with an L-shaped mounting plate 13 having screw holes 12 for bolt tightening.
3 into the required location on the top of the pile 1, and then tighten the mounting bolt 1.
Fixed at 4th grade.

For example, it is possible to directly fit and fix the inclinometer 10 onto the top of the steel pipe main body 2 by having the above-mentioned mounting plate 13, and in this case, the inclinometer 10 may be placed on the side of the inner and outer surfaces of the steel pipe main body 2.

Further, by using the top of the axial junction joint 3 protruding from the outer periphery of the steel pipe main body 2, it can be fitted and fixed with the mounting plate 13 in the same manner as described above.

When the junction joint 3 is of a pipe type,
When the inclinometer 10 is fitted inside the pipe, the pipe-shaped junction joint 3 protects the inclinometer 10 and prevents damage to the inclinometer 10.

In addition, as shown in FIG.
It is possible to use various attachment means, such as fitting and fixing by holding.

The above-mentioned inclinometer 10 can freely set the inclination measurement direction depending on the position of the L-shaped mounting plate 13, and can be attached to the top of the pile 1 either in the same direction or in the perpendicular direction.

Incidentally, the installation of the above-mentioned inclinometer 10 to the top of the pile 1 is usually carried out as follows.
This is done while the pile 1 is placed on the ground before it is erected.At this time, it is very difficult to install the inclinometer 10 so that it is vertical when the pile 1 is erected vertically. Install it so that it is almost vertical, and build up the contact resistance 1.

After installing the inclinometer 10 on the top of the pile 1 as described above, the verticality of the pile 1 was measured using the transit 15 installed at a position in the X-axis direction and the Y-axis direction away from the driving position of the pile 1. , if it is tilted, correct it so that it is vertical.

The above-mentioned correction means is carried out by a construction machine or a pushing machine. For example, in the case of a pushing machine, the lower part of the pile 1 is gripped by the tightening ring 16 of the pushing machine, and the pushing machine is installed at four locations around the periphery of the pile 1. This is done by operating the 174 jacks for vertical operation.

Then, the zero point of the inclinometer 10 is corrected in accordance with the verticality measured by the transit 15.

In other words, since the inclinometer 10 is attached to the top of the pile 1 in a nearly vertical state, the zero point correction is performed as described above.

After setting as described above, the pile 1 is driven and press-fitted while controlling the inclination, that is, the verticality, of the pile 1 based on the value detected by the inclinometer 10 shown on the indicator 11.

If pile 1 tilts during this driving press-in, -F
The perpendicularity can be corrected using the pushing machine in the same manner as described above.

When the driving and press-fitting of the pile 1 of a predetermined length is completed, the verticality is finally checked and the verticality is corrected as necessary.

As described above, the present invention performs driving press-in while controlling the verticality with an inclinometer attached to the top of the pile, which is a steel pipe sheet pile, so the verticality of the pile can be measured precisely, and especially when the driving progresses. Even if the length of the pile remaining on the ground is shortened, its verticality can be precisely measured and managed, and steel pipe sheet piles can therefore be driven with good verticality.

In addition, since the inclinometer is attached to the top of the pile, the pile can be driven and press-fitted without any problems, and there are no problems with construction work.

However, in order to increase the length of the piles, when piles such as steel pipe sheet piles are successively added and driven, the piles are added and constructed as follows.

As shown in FIG. 7, an upper pile 1b is erected on top of the pile 1, that is, the upper pile 1a, which was previously driven in the manner described above, and is connected to the upper pile 1a. For example, two inclinometers 10 that can electrically detect inclination angles in the X-axis and Y-axis directions mentioned above are installed, and the inclination angles in the same two directions as described above are also electrically detected at the upper end of the upper pile 1b. Two inclinometers 10 are installed.

In particular, the inclinometer 10 attached to the upper pile 1a may be used as is, as it was installed when driving the upper pile; in this case, only the inclinometer 10 attached to the upper pile 1b needs to be zero-point corrected by the same means as described above. That's fine.

Further, each inclinometer 10 is connected to a separately installed indicator 11.

Then, the end faces of the two threads 1a and 1b are joined together by welding means so that the inclination of the upper pile 1b matches the inclination of the upper pile 1a based on the detected value by each inclinometer 10 shown on the indicator 11.

By joining in this manner, the straightness of the upper and lower parts 1a and 1b is ensured.

At this time, if the upper stake 1a is vertical, the upper stake 1b will naturally also be vertical.

If there is an inclination, the perpendicularity may be corrected after the connection.

In addition, the verticality of the upper pile 1a and the upper pile 1b can be corrected in advance before the upper and lower parts 1a and lb are joined. In this case, first, the inclinometer 1 Then, the upper pile 1b is held vertically according to the detected value of the inclinometer 10 attached to the upper pile 1b, and in this state, the upper and lower parts 1a and 1b are joined.

This ensures the verticality and straightness of the upper and lower parts 1a and lb.

In any of the above cases, the inclinometer 1 attached to the upper pile 1b
The pile may be driven and press-fitted while managing the inclination using the detected value of 0.

According to the method of the present invention as described above, vertical control when performing joint piles can be precisely and easily performed using the upper pile and an inclinometer attached to the upper pile. Since it can be controlled precisely, the pile core can be kept straight and construction can be carried out vertically.

In addition, the present invention can be implemented not only when driving steel pipe sheet piles as described above, but also when driving ready-made piles to be used as foundation piles.

It is particularly effective when the pile length is long and multiple piles are welded together, and it is possible to perform vertical construction.

Furthermore, in the above embodiment, two inclinometers are used, one each in the two directions of the X-axis and Y-axis of the pile.
It goes without saying that if an inclinometer capable of simultaneously detecting inclinations in two Y-axis directions is used, it is possible to detect two directions with one inclinometer by attaching this inclinometer to either the X-axis or Y-axis direction.

Further, in the above-described embodiments, the inclinometer is attached to the top or upper end of the pile, but the present invention can be implemented in the same manner even if the inclinometer is attached to the top of the pile or any other suitable location.

According to the construction method of the present invention described above, there are the following excellent effects.

■ In the case of steel pipe sheet pile walls and steel pipe sheet pile well construction methods, it has traditionally been difficult to construct steel pipe sheet piles vertically and straightly.
In particular, the longer the pile, the more difficult it is to construct it due to errors in the end face of the steel pipe body and errors in the junction joint.In particular, in the case of steel pipe sheet pile wells, it was difficult to finally close them into a ring shape. According to the above-described method of the present invention, steel pipe sheet piles can be driven vertically and straightly, and even when joint piles are to be installed, the upper and lower parts can be welded together in a completely straight manner, and the piles can be driven vertically and press-fitted. There is no problem with the final closing, and it can be easily and successfully constructed.

■ When constructing foundation piles, no matter how long they are, they can be connected and constructed vertically and straightly, just as in the case of the steel pipe sheet piles mentioned above, and there is no risk of buckling under load due to the inclination of individual piles. Safe pile bearing capacity can be obtained.

■ In the non-vibration construction method, steel pipe sheet piles, etc. are press-fitted while over-drilling the ground, so there is a lot of risk that the piles press-fitted into the ground will tilt during construction, but according to the method of the present invention, similar to the above It becomes possible to press-fit vertically while correcting the inclination of the pipe.

■ Since the inclinometer is installed at the top of the pile of steel pipe sheet piles, etc., pile driving and press-in construction can be performed without any problems.In particular, for pipes and pipe-type steel pipe sheet piles, the inclinometer can be stored inside the top P. There is no risk that the inclinometer will be damaged or become an obstacle during construction.

■ During construction, it is possible to grasp the inclination of piles such as steel pipe sheet piles as analog and digital quantities, and it is possible to estimate and calculate the positional deviation of the pile tip when driving and press-fitting in a horizontal state. It is possible to prevent the pile from tilting and shifting.

[Brief explanation of the drawing]

1 is a schematic plan view illustrating steel pipe sheet piles with different joints; FIG. 2 is a schematic plan view illustrating an example of construction of steel pipe sheet piles; FIG. 3 is a front view illustrating an embodiment of the present invention; This figure is a perspective view of the inclinometer, FIGS. 5 and 6 are perspective views showing an example of how the inclinometer is installed, and FIG. 7 is a front view showing an example in which a joint pile is installed. 1... Piles of steel pipe sheet piles, etc., 2... Steel pipe body, 3... Junction joint, 1a...
...Upper stake, 1b...Upper pile, 10...Inclinometer, 11...Indicator, 15...Transit.

Claims (1)

[Scope of Claims] 1. When driving and press-fitting piles such as steel pipe sheet piles or foundation piles into the ground, inclinometers for electrically detecting the inclination angle of the piles are placed at right angles to each other at the top of the piles to be driven and press-fitted. A method for driving piles such as steel pipe sheet piles, characterized in that the piles are installed so that the inclination in two directions can be detected, and the piles are driven and press-fitted while managing and correcting the inclination of the piles based on the values detected by the inclinometer. 2 When piles such as steel pipe sheet piles or foundation piles are added vertically and pressed into the ground, the angle of inclination is electrically detected between the top of the lower pile that has already been driven and the top of the upper pile that connects it. Inclinometers are installed so that they can detect inclinations in two directions perpendicular to each other, and the two shafts are welded together straight in the axial direction so that the inclinations of the upper and lower piles are matched by the values detected by the inclinometers, and then the above joints are A method for driving piles such as steel pipe sheet piles, characterized by driving and press-fitting piles. 3 When piles such as steel pipe sheet piles or foundation piles are added vertically and pressed into the ground, the angle of inclination is electrically detected between the top of the lower pile that has already been driven and the top of the upper pile that connects it. Inclinometers are installed so that they can detect inclinations in two directions perpendicular to each other, and the upper and lower stakes are corrected to be vertical using the values detected by the inclinometers, and then the upper and lower stakes are held vertically. A method for driving piles such as steel pipe sheet piles, which comprises welding them vertically in the axial direction and then driving and press-fitting the joined piles.