JPH04198596A - Concrete lining method of tunnel and device thereof - Google Patents

Abstract

PURPOSE:To line a tunnel by making use of the same form device and to curtail a construction cost by turning and turning reversely tunnel lining forms mounted on a traveling car, and placing lining concrete of an upper half section and lower half section of the tunnel. CONSTITUTION:Tunnel lining forms 1 describing a certain length of a circular arc are mounted on a traveling and moving car 2, and they are placed to one side of the lower part of a tunnel excavated section at specific intervals. Then, after lining concretes 20 are placed in the intervals, the lining forms 1 are turned reversely to position them to the other side of the lower part of the tunnel excavated section at specific intervals, and the lining concretes 20 are placed in the intervals. The lining forms 1 are so rotated that they are placed to the top end of the excavated section by extending over between both side lining concretes 20 of the lower part of the excavated surface, and lining concrete 20' is placed between the lining forms 1 and the top end of the excavated section. According to the constitution, lining can be made with the same form 1 only.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a construction method and apparatus for concrete-subsequent lining in the NATM construction method.

(Prior art) Concrete-primary lining in the NATM construction method is not carried out by excavating the entire section due to the ground conditions, but is constructed by dividing the tunnel into an upper half section and a lower half section. It is considered an uneconomical construction method because it generates a lot of dust, creating a poor working environment, and there is a large amount of loss due to material bouncing around. Recently, various methods of lining the concrete using formwork have been proposed as construction techniques to improve such problems, and are being implemented on a trial basis.

(Problem to be solved by the invention) In the case of the above-mentioned formwork method, there are the following problems.

(il h Since the lining curvature of the upper and lower half sections of the tunnel is different, formwork for the upper half section and for the lower half section are required.

(11) A new formwork will be manufactured for each cross section of the lining.

(iii) When mounting the formwork on a moving vehicle, it is difficult and time-consuming to install and replace the formwork at locations with different lining curvatures.

The present invention has been proposed in view of the problems of the prior art described above, and its purpose is to perform concrete lining of the upper and lower half sections of a tunnel using the same formwork device. The purpose of the present invention is to provide concrete covering methods and equipment for tunnels.

(Means for Solving the Problem) In order to achieve the above object, according to the concrete lining method of I. Nel according to the present invention, an arc of a constant length is drawn.
The formwork for tunnel lining is mounted on a mobile vehicle, and the formwork for lining is placed at a predetermined interval on the lower side of the tunnel excavation surface, and the lining concrete is placed at the same interval. After pouring the lining concrete 1, the formwork for the lining 2 is reversed and placed at a predetermined interval on the other side of the lower part of the tunnel excavation section, and the lining concrete 1 is placed at the same interval. Then, the lining formwork is rotated so that it is positioned at the top of the excavation cross section so as to straddle between the covering concrete on both sides of the T side of the excavation surface, and the lining formwork and the top of the excavation cross section are A concrete lining will be placed between the two.

Furthermore, the lining formwork is composed of a plurality of formworks joined together via joint pins, and by changing the joint pin positions of adjacent formworks, the lining formwork can be applied in response to changes in the curvature of the excavation cross section. It is configured to change the curvature of the formwork.

Further, the tunnel concrete lining device according to the present invention includes a moving vehicle, a lining formwork supported on the moving vehicle so as to be able to turn, rotate, and tilt freely, and an eye installed in the lining formwork. It consists of extensible gable formwork to prevent leakage of poured concrete.
The lining formwork is composed of a plurality of formworks joined together via joining pins whose joining positions are variable.

(Function) According to the present invention, the formwork for lining the tunnel (drawing an arc of a certain length) mounted on a traveling vehicle is sequentially placed on one side of the lower part of the tunnel excavation cross section and on the other side of the lower part. After placing the lining concrete of the cross section of both sides of the lower part of the tunnel between the same formwork and the excavation surface, move the formwork to the top part between the two lining concrete parts, By placing lining concrete at the top of the tunnel excavation cross section, the upper and lower half cross sections of the tunnel are lined with concrete using the same formwork device.

According to the invention of claim 2, when constructing the lower half of the tunnel excavation surface with different lining curvatures, by changing the position of the joining pin between the formworks constituting the lining formwork. By changing the curvature of the lining formwork, construction of the lower half is made possible.

Further, according to the tunnel concrete 1-lining device according to the present invention, by attaching an expandable end formwork to the lining formwork, when performing the concrete = I lining method, the lining This prevents concrete from leaking.

(Example) The present invention will be described below with reference to the illustrated embodiments.

1. Draw an arc of a certain length <In the formwork for tunnel lining, a swing actuator 4 mounted on a rotary table 3 on a running roller 2, a main boom 5 mounted on the actuator 4, and a mold It is supported via a frame tilt correction jack 6.

The lining formwork 1 is composed of a plurality of formworks 7, and adjacent formworks 7 each have a plurality of pin holes 8 provided in their joint flanges.
, 9.10, 11.12 through pins 13.14, and by selecting the pin holes into which the pins 13.14 are inserted, the curvature of the lining formwork can be adjusted. It is configured to be changeable.

This curvature correction is carried out when moving from the upper half of the curvature to the lower half.

15 is an extensible end formwork for preventing leakage of poured concrete installed in the formwork 1 (=J), for example, the end formwork described in Japanese Patent Publication No. 1-275897 proposed by the present applicant. applies.

In the figure, reference numeral 16 indicates the joining part of the formwork (2), and reference numeral 17 indicates the outer I to rigger of the roller 2 that runs.

Then, the running roller 2 carrying the lining machinery device is stopped near the tunnel face B (see Fig. 6), and the lining formwork 1 is vertically moved by the swing actuator 4 via the main boom 5. Erecting (see FIG. 7) The formwork 1 is arranged parallel to the face B by rotating the rotary table 3 horizontally, and the rollers 2 running are advanced to a predetermined lining position to set it in place. (See FIG. 8) Next, the swing actuator 4 is turned to the right to fix the lining formwork 1 at the ground line G and I positions.

Next, the main boom 5's telescopic jack and the formwork inclination correction jack 6 are used to hold the lining formwork facing the excavation surface at a predetermined interval and fix the formwork 1, and then the concrete casting nozzle is fixed. 18 to concrete - 1 - pouring opening] 9
, and pour concrete lining I.20 into the space between the formwork 1 and the excavated surface A. (Refer to Fig. 9) Next, a concrete pouring nozzle] 8 is inserted into the secondmost part of the lining formwork 1, and lining concrete 20 is poured.
・Complete the lining on the right side of the lower section of the channel.

(See FIG. 10) Next, the swing actuator 4 is turned to the left to make the lining formwork 1 face to face with the excavation surface A on the left side of the lower half of the tunnel cross section, which is opposite to the previous one, and to fix it. (See Figure 11) Next, in the same manner as described above, concrete 20 for lining is placed between the form 1 and the excavation surface A using the concrete pouring nozzle 18 inserted into the concrete pouring opening of the formwork 1 for lining. Pour concrete. (See Figure 12) After completing the lining on the left side of the lower part of the tunnel cross section, the main boom 5 is erected vertically while turning the swing actuator 4 to the right, and the lining is carried out across the left and right lining concrete 20. The formwork 1 is fixed, and lining concrete for the top end is poured in the same manner as described above. (13th
(See figure) When the pouring of the concrete lining 1-20' at the top is completed, the primary lining for the half section of the l-channel section is completed. (See Figure 14) Next, after excavating a certain distance in the lower half of the tunnel cross section, similar to the concrete lining method for the upper half, the moving roller 2 equipped with the lining machinery is placed at a predetermined position. The lining formwork is vertically erected by the turning actuator 4, the rotary table 3 is turned horizontally to arrange the formwork 1 parallel to the face B, and the rollers 2 are moved to a predetermined lining position. Move forward and settle on the ground line. (See Fig. 15) Next, the telescopic jack of the main boom 5 and the formwork inclination correction jack 6Q are used to determine and fix the opposing distance between the excavation surface A and the lining formwork 1, and then the concrete pouring nozzle 18
Insert it into the concrete pouring hole 19 and install the lining concrete I.
・Place 20. (See FIG. 16) After completing the concrete lining on one side of the lower half of the cross section of the tunnel excavation, the swing actuator 4 is rotated to face the excavation surface on the opposite side, and the lining formwork 1 is fixed.

Furthermore, a concrete nostle 18 is installed at the concrete pouring opening 19.
is inserted and lining concrete 20 is poured. (No. 17
(See figure) As mentioned above, the curvature of the lining form 1 is changed when the construction moves to the lower half of the tunnel excavation cross section.

(Effects of the Invention) As described above, according to the method of the present invention, the lining concrete of the upper and lower half sections of the tunnel can be formed with the same formwork device by rotating and reversing the lining formwork with the same formwork device. This is the place where the concrete is poured.

According to the second aspect of the invention, a plurality of formworks constituting the lining formwork are joined via joint pins, and the position of the joint pins is changed, so that the lining work is adjusted in response to changes in the curvature of the excavation cross section. Change the curvature of the formwork!・It can be used as a formwork for concrete lining of the upper and lower half of the tunnel, eliminating the need for a formwork for the lower half, reducing the number of concrete pouring surfaces, and creating a beautiful finished pouring surface. The invention is a mobile vehicle,
It consists of a lining formwork supported on the moving vehicle so as to be able to turn, rotate, and tilt, and a telescopic end formwork attached to the lining formwork to prevent leakage of poured concrete. The construction formwork is made up of a plurality of formworks joined via joint pins whose joint positions are variable, and constitutes a concrete lining device of I-channel, thereby making it possible to carry out the above-mentioned lining construction method smoothly. It is something.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing an embodiment of the concrete lining method for tunnels according to the present invention, and Fig. 2 shows an example of the concrete lining device for tunnels according to the present invention. Figure 3 is a plan view showing the formwork joint, Figure 4 is a side view.
5 and 5 are side views, respectively, and FIGS. 6 to 17 are longitudinal sectional views showing the steps of the method of the present invention. DESCRIPTION OF SYMBOLS 1... Formwork for tunnel lining, 2... Running roller, 3... Rotating table, 4... Swinging actuator, 5... Main boom, 6... Formwork inclination correction jack, 7... Formwork, 8, 9.1.0.11.12... Pin hole, 13, 1
4... Pin, 15... Gable formwork, 18...
・Concrete I・Pouring nostle, 19... Concrete pouring opening. Agent: Patent attorney Shige Okamoto (1 person)

Claims (1)

[Claims] 1. A tunnel lining form that draws an arc of a certain length is mounted on a moving vehicle, and the lining form is placed at a predetermined interval on one side of the lower part of the tunnel excavation cross section. After placing lining concrete at the same intervals, the lining formwork is reversed and placed at a predetermined interval on the other side of the lower part of the tunnel excavation cross section, and the lining concrete is placed at the same intervals. The lining concrete is placed, and then the lining formwork is rotated so that it is located at the top of the excavation section, spanning between the lining concrete on both sides of the lower part of the excavation surface, and the lining formwork and the excavation section A concrete lining method for tunnels characterized by placing lining concrete between the crown and the crown. 2. The lining formwork is composed of a plurality of formworks joined together via joint pins, and by changing the position of the joining pins of adjacent formworks, the lining formwork can be adjusted in response to changes in the curvature of the excavation cross section. The concrete lining method for a tunnel according to claim 1, wherein the curvature of the construction formwork is changed. 3. A traveling vehicle, a lining formwork supported on the vehicle so as to be able to rotate, rotate, and tilt freely, and a telescopic gable for preventing leakage of poured concrete attached to the lining formwork. 1. A concrete lining device for a tunnel, characterized in that the lining formwork is constituted by a plurality of formworks joined together via joining pins whose joining positions are variable.