JPS61122327A - Device of pressing-in and supporting well caisson - Google Patents

Abstract

PURPOSE:To perform rapid sinking and installation of a well caisson, by a method wherein the well caisson is secured to a second support beam, the second beam is engaged with the upper surface of a first support beam to support the well caisson, and the second support beam is disposed to the under surface of the first support beam to press in the well caisson. CONSTITUTION:The upper end of a well caisson W is secured to the undersurface of a second support beam 10, the second support beam 10 is engaged with the upper surface of the first support beam 7, and this causes supporting of the well caisson W to a support frame 1. After, with this, a ground in the vicinity of the lower end of the well caisson W is excavated down to a given depth, the second support beam 10 is removed from the well caisson W. After the first support beam 7 is raised by means of a hydraulic jack 8, the second support beam 10 is secured to the well caisson W again, and the first support beam 7 is lowered with the aid of the hydraulic jack 8 to press the well caisson W into a ground. This enables to perform supporting and pressing-in of the well caisson W only through engagement of the second support beam with the first support beam, and permits rapid sinking and installation of the well caisson W.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press-fit support device used when sinking a well into the ground.

Generally, when constructing a well, the upper end of the well is supported while the ground near its tip is excavated, and after excavation, the well is sunk by its own weight or by press-fitting. Various types of press-fit support devices have been proposed for use in the above-mentioned submerged construction, but all of them have a large number of parts, and it is difficult to switch from the support state to the press-fit state.
Another drawback is that it is cumbersome to handle in terms of adding wells, etc., and it is not advantageous to carry out submergence construction quickly.

It is an object of the present invention to provide a press-fit support device for a well that can solve the problems of the conventional devices as described above and speed up the submergence construction.

That is, the present invention includes a support frame in which a plurality of columns are provided between horizontal upper and lower frames, each of which is open in the center; at least one pair of horizontal first support beams that are suspended and supported; and a second support beam that is disposed laterally between the first support beams and has a well mounting portion in the middle, the second support beam having both ends. A press-fit support device for a well, comprising: a second support beam that can be engaged with the first support beam; and an operating member that is provided on the support frame and that raises and lowers the first support beam. be.

The embodiments shown in the drawings will be described below.

1 to 5 show a first embodiment of the present invention, 1 is a support frame, and this support frame 1 has horizontal upper and lower frames 2 and 3 that are open in the center. A plurality of (four in the illustrated example) pillars 5 are provided between 2 and 3. A guide groove 6 is formed in the support column 5, and a pair of horizontal first support beams 7 with both ends inserted into the guide groove 6 are disposed between the support columns 5, 5 so as to be movable up and down. 7 designates an operating member provided on the upper frame 2, Ilj, t
6 'II m t' (7) M M 'j 'r
By adding y 'r 8 (7)°''91,
It is suspended and supported by the upper frame 2. The first support beam 7 is raised and lowered by the operation of a hydraulic jack 8.

Reference numeral 10 denotes a second support beam that includes a pair of beam members 10a and 10b parallel to each other, and this second support beam 10 is provided with a well mounting portion 11 in the middle, and each beam member 1 (la,
Both ends of 10b can be engaged with the first support beam 7. 13 is an outrigger that supports the support frame 1 on the ground E; 114 is a support girder that temporarily supports the well; 15 is a support girder 14;
This is a guide roller provided at the tip of the

Next, the use of the above device will be explained. 1 and 2 and 3 show a state in which a well iw formed by stacking and connecting a large number of precast concrete well units is supported, and at this time, the upper end of the well W is connected to the second support beam 10. The beam members 10a and 10b of the second support beam 10 are fixed to the lower surface of the mounting portion 11, and both ends of the beam members 10a and 10b of the second support beam 10 engage with the upper surface of the first support beam 7. 1
0° It is supported by the support frame 1 via the first support beam 7 and the hydraulic jack 8. In this state, an excavator (not shown) inserted into the well W excavates the ground near the tip of the well.

After excavating to a predetermined depth, the second support beam 10 is
After removing it from the first support beam 7 and raising it to an appropriate height by operating the hydraulic jack 8, the second support beam 10 is removed as shown in FIGS. It is fixed again to the well W at the attachment part 11.

Then, the first support beam 7 is lowered by the operation of the hydraulic jack 8, and both ends of the respective beam members 10a, 10b of the second support beam 10 are engaged with the lower surface of the first support beam 7, and in this state, the first support beam 7 is lowered. is further lowered and the well W is press-fitted into the ground. In addition, if the ground is soft and the well sinks due to its own weight, it should be
It is also possible to lower the support beam 7 and scuttle the well W, thereby eliminating the need to perform the press-fitting operation as described above.

After the Izutsu W is press-fitted, the second support beam 10 is removed from the Izutsu W as shown in FIG. The well is sunk by operation. If the ground is soft, temporarily fix the bracket 16 that can engage with the support girder 14 on the outer circumferential surface of the Izutsu Ni-knit so that the Izutsu is on the ground when press-fitting the Izutsu or adding a new Izutsu unit. No longer scuttling below the surface.

7 to 9 show a second embodiment, in which each beam member 10a, 10b of the second support beam 10 has a cylindrical shape, and the engaging portions 12 are housed at both ends thereof. The engaging portion 12 is connected to each beam member 10a by actuation of a hydraulic jack 17 installed in each beam member 10a.

10b can be expanded and contracted in the longitudinal direction (see FIG. 9), and can be freely engaged with and disengaged from the first support beam 7.

When using this embodiment, the engaging portion 12 shown in FIG. When switching to the press-fitted state, it is sufficient to expand and contract the engaging portion 12 and raise and lower the first support beam 7. At this time, there is no need to remove the second support beam 10 from the well W, which facilitates the switching operation. Moreover, it can be done in a short time.

FIG. 10.11 shows a third embodiment, in which the first support beam 7 is constituted by a pair of beam members 7a and 7b fixed at a vertical interval, and the second support beam 10
The engaging portion 12 is inserted between the beam members 7a and 7b to engage with each other. Further, a screw shaft 18 with a handle is pivotally attached to the beam members 7a and 7b.
is designed to expand and contract. The expansion and contraction operation of the engaging portion 12 may be performed by a hydraulic jack as in the first embodiment. According to this embodiment, it is possible to immediately switch from the supporting state to the press-fitting state.

Figure 12.13 shows a fourth embodiment, which is similar to the first
A winch 19 with a double drum is used as an operating member for raising and lowering the support beam 7, and is installed on the lower frame 3. The wires 20 of one drum are beam members 7a and 7b.
The wire 22 of the other drum is fixed to the beam member 7b.The wire 22 of the other drum is fixed to the beam member 7b. When the wire 20.22 is in a stationary state, the well W is supported, and the well mW is press-fitted into the ground by the winding and unwinding operations of the wire 20.22.

The above embodiments can be applied not only to construction on land but also to construction on water.

That is, as shown in the first embodiment in FIG. 14, a workbench 24 may be installed between a plurality of steel pipe supports 23 driven into the bottom of the water, and the support frame 1 may be fixed to this workbench 24.

This invention is as described above, and the well can be supported or press-fitted simply by engaging both ends of the second support beam to which the well is attached to the first support beam, and moreover, the well can be supported or press-fitted from the supporting state of the well. It has the following effects: switching to a press-fitting state or adding a well can be easily performed, the well can be sunk quickly, and the structure is simple and manufacturing is easy.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the supported state of the well, FIG. 1 is a perspective view showing the supported state of the well, FIGS. 2 and 3 are front views and plan views showing the same state as above, and FIGS. A front view and a plan view showing the press-fit state of the same as above, No. 6
FIG. 7 is a perspective view of the well when the well is added; FIG. 7 is a perspective view of the second embodiment of the invention, showing the supported state of the well;
The figure is a perspective view showing the press-fitted state of the same as above, and Fig. 9 is a perspective view of the same as above.
FIG. 10 is a plan view of the support beam, and FIG. 10 is a perspective view showing the supporting and press-fitting state of the well, FIG. 11 is a plan view of the second support beam, and FIG. 12 is the third embodiment of the present invention. A perspective view showing the support and press-fitting state of the well in the fourth embodiment.
FIG. 13 is a front view of the same as above, and FIG. 14 is a perspective view showing an example of construction on water. 1... Support frame 2... Upper frame 3... Lower frame 5... Support column 7... First support beam 8... Hydraulic jack 10... Second support beam
10a, 10b...beam member 11...attachment part
12...Engagement part 19...Winch W...
・Izutsu-mura Kasumikan 10 [! 1 f&pH2 diagram ffi+4 leap

Claims (1)

[Claims] 1. A support frame in which a plurality of columns are provided between horizontal upper and lower frames each having an opening in the center; at least one pair of transverse first support beams;
a second support beam disposed laterally between the first support beams and provided with a well mounting portion in the intermediate portion, the second support beam having both ends engageable with the first support beam; A press-fit support device for a well, comprising: an operating member that is provided on a support frame and moves the first support beam up and down.