JPH02274918A - Method of avoiding crossing buried thing in construction with open shield machine and open shield machine used therefor - Google Patents

Abstract

PURPOSE:To shorten construction period and reduce construction cost by lowering movable side plates immediately before a buried obstacle when the obstacle is in the front of the track and by raising the movable side plates after the machine has passed below the buried obstacle to carry out the construction unintermittently. CONSTITUTION:A side plate is divided in vertical way or in vertical and side way, and a front part movable side plate 4a, a back part movable side plate 4b, a front part fixed side plate 5a and a back part fixed side plate 5b are formed. Next, front and back part lift jacks 6a and 6b are provided so that each of the movable side plates 4a and 4b slides and lifts up and down on the outside surfaces of the fixed side plates 5a and 5b. Additionally, when a propulsive jack is operated to advance it and there is a crossing buried thin 11 on the track, the side plates 4a and 4b are lowered to pass below the buried thin and after passing, they are raised. Consequently, it is possible to carry out construction works safely and effectively without cutting around the buried thin 11, lifting up a shield machine and resetting it.

Description

[Detailed description of the invention] "Field of industrial application" This invention improves the open shield machine used for burying water and sewerage pipes, boxes, etc., and buries them in the path of the open shield machine. This article relates to a construction method for avoiding cross-buried objects and the open shield machine used for this method.

``Prior Art'' An open shield machine is used when laying underground objects such as water and sewage pipes and boxes into open trenches. This open shield machine mainly consists of left and right side plates and a frame to which the side plates are attached, and is equipped with a propulsion jack that allows it to move forward while linking with an excavator such as a backhoe to perform work on laying newly constructed buried objects. There is.

By the way, underground objects such as large and small water and sewage pipes, gas pipes, telephone cables, etc. are buried under roads in urban areas, crossing the roads. Among these, small-diameter water pipes will be cut in advance, but large-diameter pipes will be difficult to relocate, so they will be suspended and protected in advance. The open shield machine that had been advanced was pulled up just in front of the suspended protection area and reinstalled immediately after the suspended protection area. The burying of the suspension protection area will be done separately from the salvage and reinstallation of the open shield machine.

As a construction method different from this, for example,
There is a construction method disclosed in ``Method and device for constructing underground structures'' described in the publication. In this construction method, approximately the upper part of the side plate of the open shield is made into a split movable side plate, and the split movable side plate is moved to avoid underground obstacles such as cross pipes, that is, buried objects, while allowing the open shield machine to move. Let's move it forward.

``Problem to be solved by the invention'' Needless to say, the former requires a great deal of time and expense as it is necessary to salvage and install the open shield machine.

In the latter case, it is not necessary to salvage and install the open shield machine, but the movable split side plate must be removed and reattached every time it passes a buried object, which still requires time and expense. and poses a danger to workers.

Furthermore, in order to allow the open shield machine to pass through the buried object while avoiding it, it is troublesome to remove the support member that supports the split movable side plate portion and to reattach it after passing.

Note that this support member is essential in order to protect the split movable side plate portion from earth pressure.

``Means for Solving the Problems'' Therefore, the present invention aims to provide a construction method that eliminates the drawbacks of the conventional construction methods and conventional open shield machines, and that can easily and safely avoid crossing buried objects, and an open shield machine used therefor. The purpose of this website is to provide the following information, and its main structure is as follows.

As shown in FIG. 1, the frame and side plates of the open shield machine 1 are divided into upper and lower parts to form an upper frame 2, a lower frame 3, a movable side plate 4, and a fixed side plate 5. By lowering it together with frame 2,
An open shield machine 1 is used to pass under the crossing buried object 11.

The open shield machine 1 used in this construction method has a frame consisting of an upper frame 2 and a lower frame 3, as described above.
The side plates are vertically divided into a movable side plate 4 and a fixed side plate 5. The movable side plate 4 is attached to the upper frame 2, and the fixed side plate 5 is attached to the lower frame 3. Elevating means 6 for elevating the movable side plate 4 together with the upper frame 2 is provided.

Note that the propulsion jack is not shown.

"Function" As shown in FIG. 1A, if there is a cross-sectional buried object 11 such as a large-diameter pipe in the path of the open shield machine 1, which moves forward while laying a new buried object 12, immediately before the cross-buried object 11, Then, the movable side plate 4 is lowered by the lifting means 6, and the first
Let the open shield machine 1 pass as shown in Figure B.

After the open shield machine 1 passes through the buried object 11, the movable side plate 4 is raised by the elevating means 6, and normal laying work is performed as shown in FIG. 1C.

``Effects'' Since there is no need to cut around the cross-buried objects, and there is no need to raise and install an open shield machine, it is possible to continuously perform new burial work, including below the cross-buried objects.

Therefore, it is possible to shorten the construction period and reduce construction costs.

Since no work is required to move or install the side plates and side plate support members, the construction is highly safe and can be carried out smoothly.

"Embodiments" Hereinafter, the present invention will be described in detail based on the embodiments shown in FIGS. 2 to 4.

1 is an open shield machine, and its frame is divided into front and rear and upper and lower parts: a front upper frame 2a, a rear upper frame 2b, and a front lower frame 3a.

A rear lower frame 3b is formed. In addition, the side plates are also divided into front and rear and upper and lower parts, such as a front movable side plate 4a and a rear movable side plate 4b.
, a front fixed side plate 5a, and a rear fixed side plate 5b. The front movable side plate 4a is attached to the front upper frame 2a,
The rear movable side plate 4b is attached to the rear upper frame 2b, the front fixed side plate 5a is attached to the front lower frame 3a, and the rear fixed side plate 5b is attached to the rear lower frame 3b. Therefore,
The open shield machine 1 is composed of a front part 1a and a rear part 1b.

Reference numeral 6a denotes a front lifting jack of the lifting means, which connects the front upper and lower frames 2a and 3a, and two jacks are provided on each side. 6b is also a rear lifting jack of the lifting means,
The rear upper and lower frames 2b13b are connected, and 2
Each book is provided.

Reference numeral 7a denotes an upper propulsion jack that connects the front upper frame 2a and the rear upper frame 2b, and one on each side is removably attached. Same (7b is a lower propulsion jack, which connects the front lower frame 3a and the rear lower frame 3b, and is removably attached to three on each side.

The front and rear movable side plates 4a and 4b are configured to slide on the outer surfaces of the front and rear fixed side plates 5a and 5b, respectively, and to be raised and lowered by the operation of front and rear lifting jacks 6a and 6b. .

8 is a hydraulic unit, which includes front and rear lifting jacks 6a, 6;
b. The vertical propulsion jacks 7a and 7b are operated individually or simultaneously. 9 is a removable reaction force plate.

Note that the front movable side plate 4a and the rear movable side plate 4b, the front fixed side plate 5a and the rear fixed side plate 5b are connected by bolts (not shown),
They can be connected and released from each other using fasteners such as nuts.

From the above configuration, in normal excavation work as shown in FIG.
, 4b are connected, and the front and rear fixed side plates 5a, 5b are also connected. A buried object 12, such as a box, for example, is successively laid in a trench 21 dug by an excavator such as a hack hoe (not shown) up to just before the cross buried object 11. When moving the open shield machine 1 forward, first move the front and rear movable side plates 4 a
s4b and the front and rear fixed side plates 5a and 5b are connected, and the reaction force plate 9 is used to take the reaction force from the backfilled soil of the newly installed buried object 12 and the backfilled soil at the back of the rear lower frame 3b, and propel it up and down. Extend the jacks 7a and 7b and attach the front part 1as, rear movable side plate 4b, and rear fixed side plate 5 of the oven shield machine 1.
Move b forward.

Next, the vertical propulsion jacks 7a, 7b are retracted to advance the rear vertical flaps A, 2b, 3b of the open shield 1.

Note that it is also optional to configure the oven shield machine 1 to move forward by applying the lower propulsion jack 7b to the buried object 12.

As shown in FIGS. 3 and 4, just before the cross-sectional buried object 11 such as a large diameter pipe in the path of the open shield 1, the front and rear movable side plates 4a and 4b are uncoupled, and the upper propulsion jack 7
After removing the front movable side plate 4a, the front lifting jack 6a is retracted to lower the front movable side plate 4a. After providing suspension protection 13 to a heavy cross-buried object 11 such as a large-diameter pipe, the inside of the front portion la is excavated. At the same time, the installation of the buried object 12 in the rear part 1b continues.

Next, the reaction plate 9 is removed, the rear movable side plate 4b is lowered by the rear lifting jack 6b, and the rear lower frame 3b is lowered.
By taking the reaction force on the backfill soil of the front part 1 as mentioned above,
After moving the rear part 1b forward, it passes under the cross-buried object 11 and moves the rear part 1b forward.

The front movable side plate 4a is raised again to carry out the laying work, and when the rear part 1b has completely passed through the crossing buried object 11, the rear movable side plate 4b is raised.

In addition, in the embodiment, the open shield machine 1 is divided into front and rear parts, but it is also possible to combine them into one piece as shown in FIG. Further, it is also possible to use a manual jack instead of a hydraulic jack as the longitudinal lifting means, or to use other known means.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the basic structure of the present invention, in which A shows the open shield machine just before the buried object to be crossed, B shows the object while it is passing, and C shows the object after it has passed. Figures 2 to 4 show examples of the open shield machine, Figure 2 is a side view of the open shield machine with one side plate removed just in front of the buried object, and Figure 3 is the open shield machine. FIG. 4 is a partially cutaway side view of the front part of the machine passing through a buried object, and FIG. 4 is a rear view thereof. 1... Open shield machine 2... Upper frame 3... Lower frame 4... Movable side plate 5... Fixed side plate 6... Lifting means (jacket) 11... Transverse buried object 21... Ditch agent Patent attorney Tadashi Yamagami Harute H amendment Written by May 24, 1999 Incident Display of 1999 Patent Application No. 97035 Name of invention Cross buried object by open shield machine Avoidance construction method and open shield machine used for it 3 Relationship with the case of the person making the amendment Patent applicant 8 Contents of the amendment (a) Page 2, lines 19 to 20 [O] is corrected to read "open cut." ``Correct O in lines 13 and 18 of page 9 to [open shield aircraft 1j. No number of claims increases due to +lf positive

Claims (1)

[Claims] 1. In open cutting using an open shield machine, the frame and side plates of the open shield machine are divided into upper and lower parts, forming an upper frame and a lower frame, a movable side plate and a fixed side plate, and a movable side plate and a fixed side plate. A construction method for avoiding a cross-buried object using an open-shield machine, which is characterized by lowering the side plate together with the upper frame to allow the open-shield machine to pass under the cross-buried object. 2 The frame of the open shield machine is divided into an upper frame and a lower frame, and the side plate is also divided vertically into a movable side plate and a fixed side plate, and the upper frame has a movable side plate,
An open shield machine characterized in that fixed side plates are respectively attached to the lower frame, and elevating means for raising and lowering the movable side plates together with the upper frame is provided. 3. The movable side plate and the upper frame, as well as the fixed side plate and the lower frame, are each divided into front and rear parts, and are provided with elevating means for elevating the front movable side plate and elevating means for elevating the rear movable side plate. The open shield machine according to claim 2. 4. The open shield machine according to claim 2 or 3, wherein the lifting means is a jack.