JP2873622B2 - Rigid connection method between box and supporting pile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for rigidly connecting a box and a support pile.

<Conventional technology> When the supporting force of the ground on the ground of a box such as a caisson or a submerged box is insufficient, it is necessary to support the weight of the box by constructing a supporting pile on the ground.

<Problems to be Solved by the Present Invention> As a method of connecting the supporting pile and the box in water, a method of casting concrete and connecting the boxes can be considered.

However, a great deal of labor and time is required for underwater reinforcing work and concrete placing work.

Underwater concrete, unlike land, has a remarkable deterioration in quality and takes a long time to harden, making it unsuitable for rigidity.

<Object of the present invention> The present invention has been made in view of the above points, and an object of the present invention is to provide a stiffening method that can easily stiffen a box and a support pile in water easily and early. It is in.

<Means for Solving the Problems> The present invention relates to a rigid connection method for rigidly connecting a support pile constructed by penetrating a box and this box, wherein an annular seal is provided in a vertical hole formed in the box. Are attached to the top and bottom at a certain distance,
The upper and lower sides of the space formed on the peripheral surface of the support pile and the vertical hole are sealed with an annular seal to form a sealed space, an inflatable material is injected into the sealed space, and the box and the support pile are expanded by the expansion pressure of the inflatable material. This is a method of rigidly connecting the box and the support hole, characterized by rigidly bonding the box.

<Description of the Present Invention> Hereinafter, the present invention will be described.

<A> Box FIG. 1 shows a longitudinal sectional view of the box 1 after the completion of the construction, and FIG.
The figure shows a plan view of the box 1.

The box 1 includes a submerged box of steel and concrete sealing structure and various caissons, and has a plurality of vertical holes 11 formed in a part thereof in the vertical direction.

 The inner diameter of the vertical hole 11 is set to be larger than the diameter of the support pile 2.

Two sets of annular seals 12 are provided on the inner periphery of the vertical hole 11 via a bracket 13 in the vertical direction.

The inner diameter of the annular seal 12 is set substantially equal to or slightly smaller than the outer shape of the support pile 2.

Further, one end of the supply pipe 14 and one end of the discharge pipe 15 are guided by communicating with the pair of annular seals 12 and the annular space 3 defined by the peripheral surface of the support pile 2, and the other ends of both pipes 14, 15 are placed on water or in a box. Guided into body 1.

The supply pipe 14 is a pipe for supplying the expansion material 4 from above the water to the annular space 3, and the discharge pipe 15 is a pipe for confirming drainage and filling of the expansion material 4.

In the drawings, water supply means and drainage means for controlling the floating and sinking of the box 1 are omitted, but they are provided as necessary.

<B> Support pile The support pile 2 includes an existing concrete pile, steel pipe pile, or cast-in-place pile, and its construction method is the same as the conventional method.

<C> Expanding material As the expanding material 4, an expanding agent mainly containing quicklime or an expanding cement can be used.

<Operation> Next, a method for rigidly connecting the support pile and the box will be described with reference to FIG.

<A> Settlement of the box The box 1 manufactured on land is towed to the site, and the box 1 is landed on the water bottom 5.

The box 1 is laid down by a known laying method such as pouring water into the box 1.

<B> Construction of support pile The support pile 2 is constructed using the vertical hole 11 of the box 1 as a guide until the pile reaches the support layer of the water bottom 5.

Thereby, an annular seal is formed between the vertical hole 11 and the peripheral surface of the support pile 2.
An annular space 3 having a sealed structure defined by 12 is defined.

<C> Rigid connection between the support pile and the box By simply inserting the support pile 2 into the vertical hole 11, the two are not connected.

Then, the expansion material 4 is filled into the annular space 3 from the base end of each supply pipe 14.

Since the annular space 3 is closed at the top and bottom with the annular seal 12, leakage from between the interference seal 12 and the peripheral surface of the support pile 2 is restricted.

Therefore, the expansion material 4 is filled in the entire area in the annular space 3.

 The water in the annular space 3 is drained from the discharge pipe 15.

When it is confirmed that the filler 4 leaks from the discharge pipe 15, the supply of the expansion material 4 by the supply pipe 14 is stopped.

As a result, the expansion pressure of the expansion material 4 acts on the support pile 2 and the inner peripheral surface of the vertical hole 11 that define the annular space 3.

The box 1 and the support pile 2 are rigidly connected together by the expansion pressure of the expansion material 4.

<Other Embodiments> Although the above embodiment has been described in connection with the case where the entire case is submerged, it is needless to say that the present invention can be applied to a case where the upper part of the case 1 is exposed from the water.

If the upper annular seal 12 defining the annular space 3 is provided above the vertical hole 11 to increase the pressure receiving area of the expansion member 4,
It can be more firmly connected.

<Effects of the Invention> Since the present invention has been described above, the following effects can be obtained.

<A> By simply injecting the inflating material into the annular space formed between the box and the peripheral surface of the support pile, the two can be quickly and firmly connected.

 Therefore, the operation can be simplified and the operation time can be reduced.

<B> Construction can be performed without any restrictions on the cross-sectional shape of the support pile or the vertical hole.

[Brief description of the drawings]

Fig. 1: Longitudinal sectional view for explaining the rigid connection technique between the box and the support pile. Fig. 2: Plan view of the box.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-12707 (JP, A) JP-A-63-40024 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02D 23/00 E02D 27/20

Claims (1)

(57) [Claims] 1. A rigid connection method for rigidly connecting a supporting pile constructed through a box and the box, wherein an annular seal is vertically arranged at a predetermined distance in a vertical hole formed in the box. The upper and lower spaces formed on the peripheral surface of the support pile and the vertical hole are closed with an annular seal to form a sealed space, and an inflating material is injected into the sealed space, and a box is formed by the inflation pressure of the inflating material. A method for rigidly connecting a box and a support pile, characterized by rigidly connecting the support pile and the support pile.