JP5213163B2 - Concrete placement management method in tunnel construction - Google Patents

Description

The present invention relates to a concrete placement management method in tunnel construction for performing tunnel lining with high accuracy and high efficiency mainly in mountain tunnel construction.

  Conventionally, in the tunnel lining, a movable centle having a mold having an arcuate cross section has been used. The tunnel lining method using this centle is that after excavating a natural ground, a centle having a cross-sectional shape smaller than the hollow cross section in the tunnel is arranged in this excavated portion, and the tunnel is opened from the concrete placement opening provided in the centle. Concrete is placed between the inner wall surface and the centle, and the centle is moved sequentially to cover the concrete.

Thus, the installation position of the centle is an important factor for determining the lining thickness of the tunnel, and various techniques have been developed for surveying the installation position. As a survey method of the installation position of this centle, conventionally, the center point of the tunnel cross section is measured in the vicinity of the joint position of the lining concrete, and a mark such as a nail is clearly indicated on the tunnel top or floor. A method of aligning the center of the centle with the mark is used. Also, in recent years, as disclosed in Patent Document 1 below, a method for determining the centle erection position by operating the laser generator and irradiating and displaying the centle erection position on the inner wall surface of the tunnel is disclosed. Has been.
JP 2000-88572 A

  In the method described in Patent Document 1, since the appropriate position of the centle is displayed on the inner wall surface of the tunnel, when a deviation occurs between the installation position of the centle and the display position, the centle erection position according to the display position However, since the amount of correction from the current installation position to the appropriate position cannot be grasped quantitatively, the correction work is troublesome. Even if the center is rotated around the horizontal axis (pitch) or rotated around the vertical axis (yaw), that is, when the center is not installed at the proper position of the tunnel line, Since the amount was extremely small, there was a problem that it was difficult to recognize visually.

  In addition, the above-described method of surveying the center of the tunnel in advance before arranging the centle has a drawback in that it takes a lot of time and effort to pre-measure before the centle is installed. In addition, there are cases where it is necessary to pass the underground vehicle during the preliminary survey, and it takes time and effort to secure traffic, and it is necessary to have a worker to perform surveying resident in the mine. There was also.

  On the other hand, conventionally, the amount of concrete to be placed has been managed based on the result of inspection at an inspection window or a wife part provided at the center. However, since the inner air cross section after tunnel excavation has attrition or extra excavation depending on the location, the amount of concrete may be insufficient or surplus, making it difficult to manage the amount of concrete placement.

Therefore, a main object of the present invention is to quantitatively assess the amount of correction of Sentoru installation position, established the Sentoru in the correct position of the tunnel linear, and thereby simplify the construction inclusive work Sentoru and pouring An object of the present invention is to provide a concrete placement management method in tunnel construction that can accurately manage the amount of concrete .

In order to solve the above-mentioned problems, the present invention according to claim 1 includes a computer storing at least tunnel linear information and tunnel cross-section information, a surveying instrument installed in a tunnel mine and capable of ranging and angle measurement, A plurality of collimation targets attached to the center position and the circumferential position of the portable information communication terminal, and a portable information communication terminal capable of monitoring and displaying a calculation result by the computer,
Each collimation target provided in the centle is collimated with the surveying instrument, and the three-dimensional coordinates thereof are measured to identify the position coordinates of the centle. Based on the tunnel linear information and the tunnel cross-section information in the computer In addition to displaying the difference between the survey value and the design value of the position coordinates of the centle on the monitor of the portable information communication terminal , the centle is installed at an appropriate position of the tunnel alignment,
Prior to the installation of the centle, the surveying instrument is used to measure the tunnel excavation cross-sectional shape, and based on the tunnel excavation cross-sectional shape and the centle mold shape, the planned concrete amount per span for the concrete placement section and Calculate the average lining thickness and display it on the monitor of the portable information communication terminal,
In addition, when placing concrete, on the monitor of the portable information communication terminal, the cumulative number of ready-mixed vehicles, a list of the history of the amount of placement up to now, and the total amount of concrete, which is the total of these, A concrete placement management method in tunnel construction is provided, in which the remaining concrete placement amount is displayed .

  In the first aspect of the invention, the collimation target provided on the centre is collimated by the surveying instrument, and the three-dimensional coordinates thereof are measured to identify the position coordinates of the centle. Since the difference between the survey value of the center position coordinates and the design value is displayed on the monitor of the portable information communication terminal based on the tunnel cross-section information, the correction amount of the center installation position can be grasped quantitatively. Thus, since the position coordinates of the centle can be grasped with high accuracy, the centle can be installed at an appropriate position of the tunnel alignment. In addition, the need for prior surveying, such as surveying the center of the tunnel before the construction of the centle, is eliminated, and the construction work of the centle can be greatly simplified.

In the present invention, pre Sentoru installed previously, the surveying advance by performing a survey of the tunnel boring sectional shape by the device, between concrete設区for each target and to Luz pan, tunnel boring section and Sentoru mold shape Since the planned amount of concrete and the average lining thickness are calculated in advance from the difference from the (planned section), it is possible to grasp the exact amount of concrete taking into account the digging and surplus digging of the tunnel excavation and placing It becomes possible to manage the amount of concrete to be accurately controlled.

Further, in the present invention, when placing concrete, the monitor of the portable information communication terminal has a cumulative number of ready-mixed vehicles as a past performance value, a list of past placement history, and the total of these. Since a certain amount of concrete is displayed and the remaining amount of concrete is displayed, the concrete to be placed can be managed with high accuracy.

According to the present invention as detailed above, the correction amount of Sentoru installation position can be quantitatively determined, can be installed Sentoru in the correct position of the tunnel linear, and with construction inclusive work Sentoru can be simplified, pouring The amount of concrete to be used can be managed with high accuracy.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In the survey system in the tunnel mine, for example, as shown in FIG. 1, a management computer 1 is installed in a field office H, and a communication base station 2 is fixedly arranged in the tunnel mine. And the communication base station 2 are connected by a communication cable 3 so that information can be transmitted. At least tunnel linear information and tunnel cross-section information are input to the management computer 1 in advance.

  On the other hand, a mine worker or the like performing excavation work in the vicinity of the face S always carries the portable information communication terminal 4 and can wirelessly communicate with the wireless communication base station 2 in both directions. Is transmitted to the management computer 1 via the wireless communication base station 2. In this example, communication between the management computer 1 and the wireless communication base station 2 is wired communication, and communication between the wireless communication base station 2 and the portable information communication terminal 4 is wireless communication. Communication may be either wireless or wired.

  On the other hand, a total station 5 equipped with laser irradiation, automatic collimation function, collimation tracking function, and automatic leveling correction function in addition to the basic functions of ranging and angle measurement is arranged behind the face. The communication base station 2 is connected. The control box 6 has a communication function with the portable information communication terminal 4, a communication function with the total station 5, and a horizontal angle and elevation angle control function with the total station 5.

  In the vicinity of the face S, heavy equipment for tunnel construction such as a wheel jumbo 7, a sprayer 8, a wheel loader, etc. are arranged. In the example shown in the figure, by a mini-bench method for excavating by simultaneous work in the upper half and lower half, After performing rock bolt drilling and charge hole / charge in each of the upper and lower halves, cut the upper and lower halves all at once, and then remove the slide → take off → primary spray → centre 9 Excavation work is performed every cycle in the procedure of erection → secondary lining concrete placement.

  The center 9 is installed behind the tunnel construction heavy machine, and as shown in FIG. 2, a mold member 10 disposed so as to form a gap with the inner wall surface T1 of the tunnel T, The frame is mainly composed of a support frame 11 that supports the mold member 10 and a travel rail 12 that can travel on the support frame 11 and is laid on the lower surface of the tunnel T.

  The formwork member 10 is provided along the inner wall surface of the tunnel T, and the outer surface thereof is formed to be smooth and made of a material that is excellent in peelability from concrete. The formwork member 10 is divided into a plurality of parts in the circumferential direction of the tunnel T, and each part is connected. Further, a concrete placement port 13 for placing concrete is provided in the vicinity of the wellhead side above the mold member 10.

  As shown in FIGS. 2 and 3, the mold member 10 is movable to the support frame 11 in the horizontal direction and the vertical direction with respect to the cross section of the tunnel T via a connecting member such as a hydraulic cylinder 11A. Is attached. Further, the amount of movement can be appropriately adjusted automatically by the surveying system described above or manually by the operator. Further, a plurality of collimating targets 14, 14... Are installed at the center position and the circumferential position of the center 9. In the illustrated example, five collimating targets 14, 14... Are installed along the inner periphery of the end surface of the mold member 10 on the face S side.

  The support frame 11 includes a portal frame 11B made of a substantially gate-shaped steel frame and the like, and a connecting member such as the hydraulic cylinder 11A to which the mold member 10 is attached.

  The travel rails 12 support the portal frame 11B so as to travel, and are laid on the lower surface of the tunnel T along the longitudinal direction.

  Next, a method for surveying the installation position of the center 9 using the survey system will be described.

  When the primary spraying after excavation is completed as described above, the centle 9 is installed so as to partially overlap the joint of the existing secondary lining concrete. At this time, each collimation target 14 provided on the centle 9 is collimated by the total station 5, and the position coordinates of the centle 9 are specified by measuring their three-dimensional coordinates. After the measurement data is sent to the computer 1, the computer 1 displays the difference between the measured value and the design value of the position coordinate of the center 9 on the monitor of the portable information communication terminal 4 based on the tunnel linear information and the tunnel cross-section information. To do.

  In the portable information communication terminal 4, a terminal screen 4 </ b> A titled “Centre positioning guidance” is displayed on the monitor according to the display format shown in FIG. 4.

  On the terminal screen 4A, a tunnel sectional view 20 is displayed on the upper side, and a circle mark is displayed in the sectional view 20 at a position corresponding to the installation position of the collimating target 14. In addition, display boxes 21... Are displayed in the vicinity of the circles, and the measured values and design values of the positions of the collimating targets 14 (positions corresponding to the planned cross section of the tunnel indicated by the one-dot chain line in FIG. 3). The difference between and is displayed numerically. Furthermore, when the difference between the measured value and the design value of the position of the collimation target 14 is negative, that is, when the measurement position of the collimation target 14 is located closer to the tunnel center than the design position, The circles displayed at the positions corresponding to the installation positions are displayed as ● (red circles).

  In addition, an information display frame 22 is displayed on the lower side of the terminal screen 4A, and the identification number of the arch concrete, the digging distance TD (Total Distance) in the wife, the planned ceiling height, and the planned tunnel height are displayed in the frame. The height of the vertical reference line SL is displayed.

  In this way, the correction amount of the centle 9 is determined based on the measurement result displayed on the terminal screen 4A.

  Next, by operating the portable information communication terminal 4, a terminal screen 4 </ b> B entitled “Concrete placement control system” is displayed on the monitor in the display format shown in FIG. 5. On the terminal screen 4B, the planned concrete amount is calculated for each designated predetermined span, and “1 span planned concrete amount” is displayed in the information display frame 25. For the calculation of the planned concrete amount, before installing the centle 9, the total station 5 measures in advance the shape of the cross section in the tunnel, that is, the amount of excavation and attrition. As a result, the distance between the center 9 and the inner wall surface of the tunnel when the center 9 is installed can be grasped with high accuracy, and the amount of concrete lining there can be calculated with high accuracy.

  On the terminal screen 4B, the identification number of the arch concrete, the planned concrete amount per span, and the average lining thickness are displayed. Thereby, quantity control of the amount of concrete becomes possible.

  Further, a list of the total number of ready-mixed vehicles and a history of the amount of placement up to the present for each arch concrete identification number are displayed as the past actual values at the lower side of the terminal screen 4B. The total amount of concrete that is is displayed.

  Further, the concrete placement remaining amount may be displayed on the monitor of the portable information communication terminal 4 by inputting the concrete placement completion quantity. Since the planned concrete amount for one span is calculated in advance as described above, the remaining amount of concrete placement can be easily grasped by inputting the amount of concrete for which placement has been completed.

[Other examples]
(1) In the above embodiment, the case where the centle is installed in the tunnel lining is applied, but the same applies to the case where a sliding form is installed for invert concrete placement. it can.

It is a system diagram of an underground survey. It is a perspective view which shows the surveying system of the installation position of the center 9. It is an end view of the face S side of the center 9. It is the terminal screen 4A which shows the center location guidance in the portable information communication terminal 4. It is the terminal screen 4B which shows the concrete amount placement management system in the portable information communication terminal.

  DESCRIPTION OF SYMBOLS 1 ... Management computer, 2 ... Wireless communication base station, 3 ... Communication cable, 4 ... Portable information communication terminal, 4A / 4B ... Terminal screen, 5 ... Light wave range finder, 6 ... Controller, 7 ... Wheel jumbo, 8 ... Blow Attaching machine, 9 ... centre, 10 ... formwork member, 11 ... support frame, 12 ... running rail, 13 ... concrete placement port, 14 ... collimation target

Claims (1)

A computer storing at least tunnel alignment information and tunnel cross-section information, a surveying instrument installed in a tunnel mine capable of ranging and angle measurement, and a plurality of collimation targets attached to the center position and circumferential position of the center , And composed of a portable information communication terminal capable of monitoring and displaying the calculation result by the computer,
Each collimation target provided in the centle is collimated with the surveying instrument, and the three-dimensional coordinates thereof are measured to identify the position coordinates of the centle. Based on the tunnel linear information and the tunnel cross-section information in the computer In addition to displaying the difference between the survey value and the design value of the position coordinates of the centle on the monitor of the portable information communication terminal , the centle is installed at an appropriate position of the tunnel alignment,
Prior to the installation of the centle, the surveying instrument is used to measure the tunnel excavation cross-sectional shape, and based on the tunnel excavation cross-sectional shape and the centle mold shape, the planned concrete amount per span for the concrete placement section and Calculate the average lining thickness and display it on the monitor of the portable information communication terminal,
In addition, when placing concrete, on the monitor of the portable information communication terminal, the cumulative number of ready-mixed vehicles, a list of the history of the amount of placement up to now, and the total amount of concrete, which is the total of these, A concrete placement management method in tunnel construction , characterized by displaying a concrete placement remaining amount .

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