JPH04189905A - Cut-and-cover method for road - Google Patents

Abstract

PURPOSE:To enable a work to be continuously undertaken without any hindrance to a traffic, and an opening to be easily and smoothly formed by constituting an elevated road of a surface plate and a support leg, and securing work space with the upper side of a work area occupying a portion of a road in a work progress direction. CONSTITUTION:Several sets of elevated road surface plates 3 as a constitutional unit of an elevated road, are stacked on a transportation trailer 8, and carried to a work site. Several vertical stacks of the road surface plates 3 are unloaded to a transportation and assembly robot carriage 9 at the work site. Thereafter, the carriage 9 is turned and the support legs thereof are erected to be set on load distribution seats 7 already laid in place. Then, the plates 3 are fed via delivery rollers 5, and secured to the elevated road surface plates 3 previously laid in place with joints 6, thereby forming an assembled type of elevated road. According to the aforesaid construction, a construction work can be continued without any hindrance to a traffic, thereby reducing a construction period and construction cost.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a road cut-and-cut method applied to cut-and-cover work in subway stations, etc.

(Conventional technology) In the conventional trenchless construction method, the first step is to investigate buried objects.

Relocation of buried objects, driving of support piles, laying of support girders, and laying of lining plates will be followed by primary excavation, shoring, and secondary excavation.

(III to be solved by the invention) In the conventional cut-and-cover construction method described above, the work after the first excavation is carried out under the lining board, so it does not obstruct the road and traffic passing above. It is necessary to occupy the road surface exclusively for the construction work, from investigation of buried objects, relocation of buried objects, driving of support piles, laying of support girders, laying of lining plates, and primary excavation, and traffic closures, traffic regulations, etc. As this will obstruct traffic, construction work will only be carried out at night when traffic volume is reduced on roads with heavy traffic, and since it will be necessary to use it for traffic during the day, excavation and backfilling work will need to be carried out repeatedly. alive. In other words, there was a problem that there was a lot of rework, which resulted in a long construction period (as well as increased costs).

Another possible method is to use a temporary structure road using an existing grade-level road surface repair vehicle, but there is a problem that the support part of the grade-level road becomes weaker as the underground is excavated.

Furthermore, in the case of construction work under the lining board after the first excavation, when a large space is required above the lining board, the lining board must be removed to make an opening, and laying the lining board again requires time and effort such as sanding the pavement. There was a problem.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems by providing a temporary construction structure that is composed of an elevated support section, a multi-level road surface board, etc., and that straddles the road in the direction of travel in order to secure a work space on a construction section. A road will be constructed, and in the space under this multi-level road, construction work such as buried object investigation, buried object relocation, and primary excavation will be carried out. At the same time, divided support piles will be driven and connected in the depth direction. When a predetermined depth has been reached, the supporting parts of the multi-level road are connected to the relocated supporting piles to form bridge piers that can provide sufficient support even as the excavation progresses, and the earth retaining piles are driven in the same way as the supporting piles. .

In addition, by using simple methods such as using sushi and rotating pins to attach the elevated support part and the road surface plate part, it is possible to install the elevated support part and the road surface plate part in a simple manner, such as by using a rotating pin. This makes it possible for people to easily and quickly secure space and recover.

(Function) According to the present invention, by using the above-mentioned means to straddle the construction section with a temporary road at the initial stage, work such as buried object investigation and buried object relocation can be carried out continuously without interfering with traffic.

Furthermore, although the space is relatively low in height, the support piles that have been divided are successively connected in the depth direction before excavation, and are driven to a specified depth, and the support parts of the overpass are fixed there. At the same time, you can obtain a support part that is suitable for ′′.

Furthermore, openings can be simply and smoothly provided on the road surface as the occasion demands.

(Example) An outline of the configuration and assembly method of a prefabricated multi-level road as an example of the present invention is shown in FIGS. 1 to 7.

In Figures 1 to 4, 1 is a prefabricated temporary structure road, 2
(underground construction) work space, 3 is a multi-level road surface board, 4 is a support leg, 5 is a moving roller, 6 is a connecting fitting, 7 is before load distribution (also serves as a guide rail for installation), 8 is a transport trailer. Reference numeral 19 indicates a robot carriage for transportation and assembly.

The prefabricated temporary structure road 1 of the present invention is constructed of a multi-dimensional road surface plate 3, support legs 4, etc., so as to straddle the road in the direction of road travel over a construction section for on-road or underground construction, etc., and to secure a work space 2. . Note that moving rollers 5 may be attached to the support legs 4. The installation procedure is shown in FIGS. 2 and 3.

Sets of three-dimensional road road surface boards 3, which are the constituent units of a three-dimensional road, are stacked and transported to a construction area by a transport trailer 8. Unit trucks, etc. (
Before the load is distributed (not shown), the guide rail 7 (also used as a guide rail for installation) is carried in and installed.The robot for transporting and assembling the three-dimensional road surface board 3 that is rolled vertically in several stages on the transport trailer 8. It is unloaded using a trolley 9, rotated, the support legs are erected, and sequentially installed on the guide rail 7, and transported using the moving rollers 5, and the already installed three-dimensional road road surface board 3 and the X feeder 6
A prefabricated three-dimensional road will be formed by joining and fixing the parts. At this time, if the ground contact area of the moving roller attached to the support leg is made thicker, the installation of the installation guide rail and load distribution shoe 7 can be omitted. The procedure for installing the three-dimensional road surface board 3 using the trolley 9 will be described in further detail.

As shown in FIG. 5, the transport and assembly robot cart 9 has wheels 10 for traveling and turning. Display jack 11゜ On top of that, small jack 14. A thin dolly truck 12 equipped with a support leg folding device 15 and the like is provided. Transport trailer-8
Among the three-dimensional road road surfaces 3 stacked in stages, the delivery/input section 13 of the transport and assembly robot cart 9 is connected to the road surface of the second stage from the top (Fig. 6).

Insert the thin dolly trolley 12 into the lower surface of the uppermost three-dimensional road surface plate 3 through this (Fig. 7), and jack up the three-dimensional road road surface plate 3 (Fig. 8). The road surface plate 3 is sent out to the upper surface of the road surface plate 9 (FIG. 9). After that, the sending/unloading section 13 is stored (the first
Figure 1) 1 Rotate the trolley to turn the road plate sideways (Figure 12), and use the support leg folding device 15 of the thin dolly-cart to unlock the support legs of the road plate, raise the support legs, and lock them again. In this state (Fig. 14), it is placed on top of the installation guide rail and load distribution shoes that have been installed.

After that, the process is as described above. Of course, if a turntable section is incorporated into the transport and assembly robot cart 9, it becomes possible to rotate the road surface plate 13 by 90'' without using the wheels 10 for traveling and turning.

When removing an overpass, follow these steps in reverse.

In addition to the above-mentioned types, for multi-level road road slabs, support legs may be separated and placed separately as shown in Figures 15 to 17, and these support legs may be of a truss type as shown in Figure 17. It can also be used as a support part. Further, for unloading and assembling the load from the transport trailer, in addition to using the robot cart for transport and assembly, it is of course possible to use a lifting machine such as a lane or a forklift 22 as shown in FIG. 15.

Next, an example of a construction method using the above-mentioned temporary construction road will be shown, taking excavation work at a subway station as an example.

Figures 18 to 29 show each step of the construction method using the temporary construction road. As shown in Fig. 18, except for the short period of installation and removal of the temporary structure road 1, as shown in Fig. 19, the location of buried objects 23 is investigated, and as shown in Fig. 20, the buried objects 23 are moved and backfilled. Since the construction work can be carried out in the space under the temporary structure road 1, the construction work can be carried out day or night, and there is no need for rework due to backfilling or the like.

As the excavation progresses, at some point the overpass support section will be relocated (
(new construction), and when the support span becomes longer, additional work such as thickening the girders (Figures 22 to 24) will be required, but considering this together, it will be a great rationalization.

Now, earth retaining pile 26. When driving the lining support piles 25, it is not possible to use a large pile driving machine as in the conventional construction method. Second
As shown in Figures 1 and 23, in this construction method, piles are driven by a small pile driving machine 32 that can enter the work space, and additional piles are connected to the top and driven out. Piles will be driven to a depth of . An example of the joint portion with the additional pile at this time is shown in FIG. That is, the additional resistor 25a is connected by the connecting plate 25b and the guide plate 25c.

As the excavation progresses, the support section of the temporary road will be installed with lining support piles 25.
You will need to move it up. Also, depending on the length of the support span, it may be necessary to increase the thickness or reinforce the temporary road surface plate. Reinforcement of the road surface board will be carried out using existing heavy machinery. New installation, relocation, and removal of the support section are performed as shown in FIGS. 31 and 32. That is, the carried support yn 29 is inserted into a predetermined position by the leg mounting cart 31, and after being connected to the lining support pile 25, the buckle 30 at the center of the support leg is tightened to extend the support leg and support the load of the temporary road.

In the process of building the frame as shown in Figure 27,
There are times when it is necessary to introduce equipment from above the temporary road. Figure 33 shows hatches 33 that have been made here and there on the road surface plate for such cases, and are connected with pins in the direction of the road shoulder. If the hatch is opened using the opening/closing cylinder 35 or the like, materials and equipment can be carried in and out from the multi-level road surface board in a short time.

(Effects of the Invention) As described above, according to the present invention, a temporary structure road is installed on the road in the construction section, straddling the road with a work space between it and the road, and excavation work is carried out on the underside of the temporary structure road. This allows construction to be carried out continuously without disrupting traffic, reducing rework, shortening the process, and reducing construction costs. It has the effect of eliminating the possibility of deterioration of function.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention. Figure 1 is a conceptual diagram of a prefabricated multi-level road, Figures 2 to 14 are conceptual diagrams of the installation procedure of a prefabricated multi-level road, and Figures 15 to 17 are conceptual diagrams of a prefabricated multi-level road. Figures 18 to 29 are conceptual diagrams of the excavation construction procedure; Figures 30 to 32 are conceptual diagrams of additional installation procedures for the assembly type grade-level road; Figure 33; The figure is a conceptual diagram of the additional steps for excavation work.

Claims (1)

[Claims] A road excavation method characterized by installing a temporary road that straddles the road with a work space between it and the road in the construction section, and carrying out excavation work on the underside of the temporary road. .