JPH081057B2 - How to build artificial ground - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing artificial ground, and more particularly to a method for constructing artificial ground including a jetty structure.

[0002]

2. Description of the Related Art Generally, artificial ground such as a jetty structure installed in a coastal water area is first constructed by placing steel pipe piles at predetermined intervals, and then vertically and horizontally on these steel pipe piles. It is constructed by arranging beam members, and then sequentially forming floor plate members as superstructures on these beam members by using cast-in-place concrete or steel plate members. However, in such a construction method, various problems such as a large-scale construction work, a long construction period, and a high cost have been pointed out to be solved.

[0003]

According to the present invention, therefore, a pile driving device is used which is provided on a work carriage which forms a starting portion and is placed on the starting portion at a construction site where such an artificial ground is to be formed. A precast girder member having a support pile member for the next stage is piled at a position separated from the starting part by a predetermined distance, and then has a head insertion hole of the support pile member and a support stage on one end side. Is fixedly installed between the end pile member and the support pile member in the starting portion, and then the next step portion is formed by fitting and integrating a floor plate member having a cross girder between these precast girder members, Further, the work carriage is moved onto the next-stage portion formed in this way to drive the support pile members, fix the precast girder members to be erected and fix the floor plate members to form the next-stage portion and thereafter. Makes the construction work easier and It is an attempt is made to reduce the construction cost to.

In this case, the starting portion is provided with at least four supporting portion supporting pile members for the starting portion by the pile driving device, and then the head insertion hole of the supporting pile member and the supporting step portion are provided at both ends. The precast girder member for the starting portion having the above is fixedly installed between the support pile members for the starting portion, and further formed by fitting the floor plate member having the transverse girder between the precast girder members for the starting portion. preferable.

Further, when the floor plate member is fitted between the precast girder members, if the floor plate member is dropped while the distance between the precast girder members is held in advance by the width determining mechanism, the floor plate member is fitted. Work can be done efficiently.

Further, it is preferable that the on-site concrete is cast and finished on the precast girder member and the floor plate member of each part, but this on-site concrete is cast by each part or collectively to some extent. It can also be set.

[0007]

According to the method of the present invention, a supporting pile member, a precast girder member and a floorboard member having a cross girder, which have been manufactured in advance in a manufacturing yard near a factory or a construction site, are carried into the site and piled. After fixing these precast girder members between the supporting pile members placed by the device,
The artificial ground can be constructed only by fitting the floor plate member having the cross girder and integrating them.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the method of constructing an artificial ground according to the present invention will be described in detail with reference to the accompanying drawings, illustrating a method of constructing a pier structure.

First, when constructing the jetty structure 10, the starting portion 12 is constructed adjacent to the land portion L. Specifically, four pile supporting devices 16 for starting section are piled by a pile driving device equipped on the work carriage 14 arranged on the land L,
Next, the precast girder member 22 for the starting portion, which has the head insertion hole 18 of the supporting pile member and the supporting step portion 20 on both end sides, is mounted on the head of the starting portion support pile portion 16 and fixed by erection. ,
Further, it is formed by fitting a floor plate member 26 having a horizontal girder 24 between the precast girder members 22 for the starting portion (see FIG. 1). In this case, each support pile member 1
A cap member is attached to the head portion of 6, and the precast girder member 22 for the starting portion is formed by exposing a part of the web member 28 in the longitudinal direction of the upper surface thereof. The lower surface of the web member 28 is fixed and held in contact with the head of the support pile member 16.

Next, the precast girder member 22 for the starting portion
Trolley 14 using the web member 28 of FIG.
Is moved to and fixed on the starting portion 12, the supporting pile members 30, 30 of the next stage are piled and arranged at a position separated from the starting portion 12 by a predetermined distance by using a pile driving device, and then one end The precast girder member 32 having the head insertion hole 18 of the support pile member and the supporting step portion 20 on the part side is installed between the supporting step portion 20 and the supporting pile member 30 of the starting portion precast girder member 22. At the same time, the starting portion side of the precast girder member 32 and the starting portion precast girder member 22 are connected and fixed by an appropriate means. At the time of connecting and fixing, it is possible to use means such as forming umbilicus portions that are fitted to each other at predetermined positions of the respective girder members and tightening the umbilicus portions with through bolts.

After the precast girder members 32 are erected and fixed, the floor plate member 34 having the transverse girders 24 is lifted and fitted between these precast girder members 32, 32 to form a next step portion 36. To do. In this case, the floor plate member 34 has a connecting mounting plate projectingly provided on the other opposing side edge portion adjacent to the side edge portion provided with the horizontal girder 24, and the connecting mounting plate and the precast girder member 32 are provided. It is preferable to connect the web member 28 by welding or the like. Further, a suspension ring 38 is provided on the upper surface of the floor plate member 34 so as to be conveniently used for lifting (see FIG. 2).

The parallel precast girder members 3
When the floor plate member 34 is fitted between the 2 and 32, for example, a precast girder member 3 is used by using a width determining mechanism including a positioning rod that is expanded and contracted by a hydraulic mechanism.
If the floor plate member 34 is dropped after the separation distance of 2 and 32 is held in advance, the work of fitting the floor plate member 34 can be efficiently performed. Further, adjacent floor plate members 34 are also connected to each other by an appropriate means.

After the work carriage 14 is moved and fixed on the next-stage portion 36 formed as described above in the same manner as described above, the support pile member 30 is driven by the pile driving device and the precast girder member 32 is erected. The steps of fixing and fitting the floor plate member 34 are performed to form the next step 40, and the steps after step 1 are sequentially formed by the same procedure (see FIG. 3).

Further, each step portion 36, 4 including the starting portion 12
The space between 0, ... Is filled with mortar, and auxiliary reinforcing bars are arranged between the floor plate members 26 and 34 and the web members 28 of the girder members 22 and 32 so that the cast-in-place concrete 42.
The finishing work may be done by each step, or it may be done collectively as a whole.

[0015]

As described above, according to the method for constructing the artificial ground according to the present invention, the units such as the precast girder member and the floor board member which are manufactured in advance in the manufacturing yard near the factory or the construction site. After the members are mounted and fixed between the supporting pile members placed by the pile driving device provided on the work cart, they are simply fitted and integrated with the cast-in-place concrete, so the construction work can be performed quickly and easily, Further, since the construction period can be shortened, the construction cost can be reduced and various advantages can be obtained.

Although the construction method of the jetty structure has been illustrated and described as a preferred embodiment of the method for constructing an artificial ground according to the present invention, the method of the present invention is not limited to this embodiment. For example, it can be suitably used also when harbor facilities such as seawalls, on land on soft ground, and the like, and can be variously modified without departing from the spirit of the present invention. is there.

[Brief description of drawings]

FIG. 1 is a part of a procedure for constructing a jetty structure as an embodiment of a method for constructing an artificial ground according to the present invention, in which a is a plan view showing a procedure for constructing a starting portion, and b is a side view of a. It is a figure.

FIG. 2 is a plan explanatory view of a plan view and b is a side explanatory view of a in a procedure of constructing a next-stage part following the starting part in the jetty structure shown in FIG.

FIG. 3 is a plan view for explaining a plan view of the pier structure shown in FIG.

[Explanation of symbols]

10 Pier structure, 12 Starting section, 14
Work trolley, support pile member for 16 starting parts,
18 head insertion hole, 20 support step,
22 Precast girder member for starting part, 24 girder,
26 floor plate member, 28 web member,
30 support pile members, 32 precast girder members, 34 floor plate members, 36 next step,
38 suspension ring, 40 next step, 42 cast-in-place concrete,

Claims (4)

[Claims] 1. A position at which a starting portion is formed at a construction site where an artificial ground is to be formed, and a predetermined distance is provided from the starting portion by using a pile driving device mounted on a work carriage mounted on the starting portion. A support pile member for the next step is piled up in the pile, and then a precast girder member having a head insertion hole for the support pile member and a supporting step at one end is used as an end pile member at the starting portion. The next step is formed by fixing the support pile members between the support pile members, and then inserting and integrating the floor plate member having the transverse girders between these precast girder members to form the next step, and the next step formed in this way. A construction method for constructing an artificial ground, characterized in that a work carriage is moved onto a part to drive a support pile member, a precast girder member is erected and fixed, and a floor plate member is fitted to sequentially form the next step and thereafter. . 2. The starting portion has at least four supporting-pile members for the starting portion piled therein by a pile driving device, and then a head insertion hole and a supporting step portion of the supporting pile member are provided on both end sides. The precast girder member for starting part having is fixed by erection between the support pile members for starting part, and further formed by fitting a floor plate member having a transverse girder between the precast girder members for starting part. The method for constructing an artificial ground according to claim 1. 3. The floor plate member is dropped while the floor plate member is fitted between the precast girder members with a width-determining mechanism preliminarily maintaining a distance between these precast girder members. The method for constructing an artificial ground according to claim 2. 4. The method for constructing an artificial ground according to claim 1, wherein on-site concrete is placed on the precast girder member and the floor plate member of each part to finish.