JP6037126B2 - How to install the box structure - Google Patents

Description

  The present invention relates to a box structure installation method, for example, a box structure installation method using an R & C (Roof & Culvert) method.

  The R & C method is a non-cutting underpass construction method that replaces and installs a pipe roof, which is a track and road protection work, and a box structure for tunnel formation.

  A specific example of the R & C method will be described as follows. That is, the shaft is excavated so as to sandwich the track and road on both sides in the width direction of the track and road. Subsequently, a plurality of steel pipe pipes having a rectangular cross section are press-fitted along the outer periphery of the tunnel formation region, one by one, from one shaft side to the ground below the track or road. Form a pipe roof to protect. Thereafter, a box structure is press-fitted into a tunnel forming region including a pipe roof under a track and a road from one shaft to the other shaft on the opposite side to form a tunnel.

  At the time of press-fitting of the above-described steel pipe, the attitude of the steel pipe is measured so that the attitude of the steel pipe (horizontal / vertical direction and rotational position) is correct. A folding target for measuring the attitude of the steel pipe is installed in the steel pipe at every predetermined distance along the longitudinal direction. This folding target is installed at the upper corner of the rectangular cross section of the pipe. In order to survey the attitude of the steel pipe, the spot-shaped laser light is irradiated to the folding target from the laser surveying device installed near the main push jack for press-fitting the steel pipe, and the position of the laser spot is determined. The attitude of the steel pipe is surveyed.

  In addition, about the installation method of the box structure by the R & C construction method, patent documents 1-3 have an indication, for example.

JP-A 64-29597 JP 2009-197535 A JP 2009-197536 A

  However, when the laser beam for measuring the attitude of the steel pipe is spot-shaped, there is a problem that it is difficult to grasp the attitude of the steel pipe (particularly, the state of rotational deviation of the steel pipe).

  The present invention has been made from the above technical background, and an object of the present invention is to provide a technique capable of easily grasping the posture of a pipe used when installing a box structure. And

  In order to solve the above problem, the method for installing a box structure according to the first aspect of the present invention is to install a plurality of pipes so as to be adjacent to each other along the outer periphery of the installation area of the box structure on the ground wall. And a step of installing the box structure in a planned installation area of the box structure including the plurality of pipes. In the step of installing the plurality of pipes, A pipe for surveying which has a survey line arranged on the inner wall surface at a distance of a predetermined angle at at least three locations along the circumferential direction, and arranged so as to extend along the longitudinal direction of the pipe. And, when installing the survey pipe, scan a linear laser beam from the laser surveying device installed on the main push position side of the survey pipe in accordance with the planned placement position of the survey line And a step of And having the steps of surveying the position of the pipe for the surveying of the relative positional relationship between the light and the surveying line, the.

  According to a second aspect of the present invention, in the first aspect of the present invention, the plurality of pipes have a rectangular opening cross section, and the upper surface of the inner wall surface of the surveying pipe and both side surfaces intersecting with the upper surface. A survey line is provided.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the survey line is provided on the bottom surface of the inner wall surface of the pipe for surveying.

  The invention according to claim 4 is the invention according to claim 1, 2, or 3, wherein the survey line is provided above the center in the height direction of the opening cross section of the pipe for surveying. To do.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the laser is measured with respect to a reference mark provided on the ground wall surface in the survey pipe installation step. The step for detecting the positional deviation state of the laser surveying instrument based on the information obtained by irradiating the laser beam from the surveying instrument and the detection result of the positional deviation state of the laser surveying instrument And a step of measuring the posture of the pipe.

  A sixth aspect of the present invention is the invention according to any one of the first to fifth aspects, wherein an inner wall surface of the survey pipe is predetermined along a longitudinal direction of the survey pipe. A scale is provided along at least two places separated by a distance from the survey line along the circumferential direction of the survey pipe.

  The invention described in claim 7 is characterized in that, in the invention described in any one of claims 1 to 6, the survey line is provided in a detachable state.

  The invention according to claim 8 is the invention according to any one of claims 1 to 7, characterized in that a light emitting means is provided on the survey line.

  According to the first aspect of the present invention, it is possible to easily grasp the posture of the pipe used when installing the box structure.

  In addition, according to the second aspect of the present invention, it is possible to easily grasp the shift in the rotation direction of the survey pipe.

  Further, according to the invention described in claim 3, it is possible to more easily grasp the attitude of the pipe for surveying.

  According to the invention described in claim 4, since the surveying laser beam is not obstructed by the trolley or the like traveling inside the pipe when the survey pipe is propelled, the survey pipe is propelled. But it becomes possible to grasp the posture.

  Further, according to the fifth aspect of the present invention, it is possible to improve the measurement accuracy of the deviation of the attitude of the pipe for surveying.

  Further, according to the invention described in claim 6, it is possible to easily derive the inclination angle of the pipe for surveying.

  Further, according to the seventh aspect of the present invention, the survey line can be reused for other pipes.

  According to the eighth aspect of the present invention, since the light can be secured inside the survey pipe, it is possible to improve the safety when the worker enters and exits the survey pipe. become.

It is sectional drawing of the earth in a tunnel formation process. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is a front view of the box-shaped roof seen from the vertical shaft. It is a front view of the pipe for surveying. It is principal part sectional drawing in alignment with the longitudinal direction of the pipe of FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is an expansion perspective view of the box of FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is sectional drawing of the earth in the tunnel formation process following FIG. It is a figure which shows typically the state at the time of attitude | position survey of the pipe for surveying. It is a front view of the pipe for surveying in the position X1 of FIG. FIG. 20 is an example of a case where the attitude of the survey pipe is shifted in the vertical direction, and is a cross-sectional view of the survey pipe at a position X2 in FIG. 19. FIG. 20 is an example of a case where the attitude of the survey pipe is shifted in the horizontal direction, and is a cross-sectional view of the survey pipe at position X2 in FIG. 19. FIG. 20 is an example of a case where the attitude of the survey pipe is shifted in the rotation direction, and is a cross-sectional view of the survey pipe at the position X2 in FIG. 19. It is principal part sectional drawing in alignment with the longitudinal direction of the pipe for surveying. It is an example in case the pipe for surveying has shifted | deviated to the orthogonal | vertical direction, Comprising: It is principal part sectional drawing in alignment with the longitudinal direction of the pipe for surveying of FIG.

  Hereinafter, an embodiment as an example of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  The installation method of the box structure of this Embodiment is demonstrated with reference to FIGS.

  1 to 7 are cross-sectional views of the ground during the tunnel formation process by the R & C method. Reference symbol R indicates a rail of a train traveling on the road surface.

  First, as shown in FIG. 1, a temporary earth retaining pile 1 is placed on the ground E, and then, as shown in FIG. 2, a rail R is installed by excavating between adjacent temporary earth retaining piles 1. Two shafts 2 are formed on both sides in the width direction of the track so as to sandwich the shaft.

  Subsequently, as shown in FIG. 3, after the bearing wall 3 and the start base 4 are built in one of the vertical shafts 2, the cross girder frame 5 is built. Then, after constructing a gantry 6 for propelling a pipe, which will be described later, a propulsion machine 7 such as a propulsion jack is installed on the gantry 6.

  Next, as shown in FIG. 4, after installing the pipe 8 on the gantry 6 by the crane car C, as shown in FIG. 5, the FC plate 9 made of a steel plate for friction cutting is put on the pipe 8 by the crane car C. Install.

  Then, as shown in FIG. 6, the pipe 8 in one shaft 2 is propelled by the propulsion unit 7 toward the opposite shaft 2 and press-fitted into the ground wall surface. When the pipe 8 is press-fitted, the survey pipe 8 that is a reference is first press-fitted. The configuration of the survey pipe 8 will be described later.

  At the time of press-fitting the survey pipe 8, for example, a process of excavating the press-fitting surface of the pipe 8 by an operator and a process of propelling the pipe 8 by the propulsion device 7 are repeated and the attitude of the survey pipe 8 (horizontal and vertical) The position of the pipe 8 for surveying is press-fitted while surveying so that it is installed in the correct attitude without shifting the direction and the position in the rotation direction. The excavated soil generated during the press-fitting of the pipe 8 is carried on the trolley traveling inside the pipe 8 to the outside.

  Thereafter, another pipe 8 is installed in alignment with the pipe 8 for surveying. When other pipes 8 are installed, excavation is performed mechanically using an excavator. In this case, the excavated soil generated when the pipe 8 is press-fitted is carried outside the pipe 8 by a transport device such as an auger.

  In this way, as shown in FIG. 7, a box-shaped roof 8R composed of a plurality of pipes 8 is formed. At the time of installing the box-shaped roof 8R, the attitudes of all the pipes 8 may be measured. However, by measuring only the attitude of the pipes 8 for surveying, the installation time of the box-shaped roof 8R can be shortened.

  Here, FIG. 8 is a front view of the box-shaped roof as seen from the shaft, FIG. 9 is a front view of the pipe for surveying, and FIG. 10 is a cross-sectional view of the main part along the longitudinal direction of the pipe of FIG. In FIG. 9, alternate long and short dash lines CL <b> 1 and CL <b> 2 indicate the center line of the opening surface of the pipe 8.

  As shown in FIG. 8, the arrangement shape of the box-shaped roof 8R is, for example, a gate shape. That is, the some pipe 8 is installed in the state adjacent to each other along the outer periphery (upper surface and side surface) of the installation plan area | region B of a box structure in a ground wall surface. However, the arrangement shape of the box-shaped roof 8R is not limited to the gate shape, and may be a single character type, for example. That is, you may install the several pipe 8 in a row in the state adjacent to each other along the upper surface of the outer periphery of the installation plan area | region B of a box structure in a ground wall surface.

  Further, as shown in FIGS. 8 and 9, for example, a rectangular pipe is used as the pipe 8 constituting the box-shaped roof 8R. That is, the front surface of the pipe 8 and the shape of the opening are formed in, for example, a substantially square shape. The dimension of one side of the front surface of the pipe 8 is, for example, about 80 cm, and the longitudinal dimension of the pipe 8 is, for example, about 3 m. However, a circular pipe having a circular front surface and opening shape may be used.

  The pipe 8 for surveying described above is installed at the corner, end or both of the box-shaped roof 8R. As shown in FIGS. 9 and 10, survey lines 10a, 10b, and 10c for measuring the posture of the pipe 8 are installed on the inner wall surface of the pipe 8 for surveying. The survey lines 10a, 10b, and 10c are arranged at a distance of a predetermined angle at least at three locations along the circumferential direction of the pipe 8.

  Here, the survey line 10a is installed at the center of the ceiling surface of the pipe 8, and the survey lines 10b and 10c are installed on both side surfaces intersecting the ceiling surface of the inner wall of the pipe 8. The survey line 10a and the survey lines 10b and 10c are arranged, for example, at a distance of 90 degrees along the circumferential direction of the pipe 8, and the survey line 10b and the survey line 10c are, for example, the circumferential direction of the pipe 8 Are spaced apart by a distance of 180 degrees. Any of the survey lines 10a, 10b, 10c is installed above the center line CL1 of the pipe 8 in the height direction.

  If the survey lines 10b and 10c are installed below the center line CL1 in the height direction of the pipe 8, the laser beam used when surveying the attitude of the pipe 8 is generated when the pipe 8 for surveying is press-fitted. There are cases in which surveying becomes impossible due to obstacles such as a trolley truck ZT (see FIG. 9) or an operator for carrying excavated soil to the outside.

  On the other hand, when the survey lines 10b and 10c are installed above the center line CL1 in the height direction of the pipe 8, the laser beam for surveying is not obstructed by the truck ZT or the like. It is possible to always grasp the deviation of posture. That is, the deviation of the posture of the pipe 8 can be grasped even when the pipe 8 for surveying is propelled. For this reason, since the deviation can be corrected at an early stage where the deviation is small, the survey pipe 8 can be installed so as to have a more correct posture. However, the survey line may be installed on the bottom surface of the pipe 8. Thereby, the attitude | position of the pipe 8 for surveying can be grasped | ascertained still more easily.

  The survey lines 10a, 10b, and 10c are installed in a state of extending along the longitudinal direction of the pipe 8. However, the survey lines 10a, 10b, and 10c may extend continuously from end to end of the pipe 8, but may be interrupted in the middle. The standard length of the survey lines 10a, 10b, and 10c is, for example, 5 m and can be set to an arbitrary length. Further, the survey lines 10a, 10b, and 10c may be formed by depressions (grooves).

  The survey lines 10a, 10b, and 10c are provided with, for example, plate magnets and are detachably installed. Thereby, the survey lines 10a, 10b, and 10c can be reused by the plurality of pipes 8. Further, the positions of the survey lines 10a, 10b, 10c can be shifted for convenience.

  Further, on the surface of the survey lines 10a, 10b, 10c, for example, light emitting means such as LEDs (Light Emitting Diode) are installed along the longitudinal direction. Thereby, since a light can be ensured inside the pipe 8, it is possible to improve safety when an operator enters and leaves the pipe 8. In addition, the power supply voltage of LED is 12V, for example, and is safe. The terminal for LDD can be used in water by waterproofing. Further, instead of the LDD, a fluorescent paint or phosphorescent paint (light emitting means) that emits light in response to laser light may be applied to the surfaces of the survey lines 10a, 10b, and 10c.

  Next, FIG. 11 is a cross-sectional view of the ground during the tunnel formation process by the R & C method following FIG.

  As shown in FIG. 11, a box 11 is built inside one of the shafts 2. The box 11 is installed behind the box-shaped roof 8R via the blade edge Bm. In addition, the code | symbol S of FIG. 11 has shown the skirt. Here, FIG. 12 is an enlarged perspective view of the box 11 of FIG.

  The box 11 is a structure for building a box structure such as an underground crosswalk, and has a hollow structure. The box 11 includes an upper slab 11a and a lower slab 11b that are opposed in the vertical (height) direction, and a pair of side plates 11c and 11d that are opposed in the lateral direction at both ends thereof. Further, the front and rear are opened as the opening 11e. The box structure described above is constructed by arranging a plurality of boxes 11 in a row in a state where the openings 11e of the boxes 11 are in communication with each other.

  In the vicinity of the four corners of the front of the box 11, a fixing material insertion hole 11f extending along the propulsion direction of the box 11 (longitudinal direction of the pipe 8) is formed so as to pass therethrough. In the middle, a notch groove 11g opened inside the box 11 is formed.

  Further, a grout hole 11h for injecting a grouting material after installation is formed in a central portion of the upper slab 11a, the lower slab 11b, and the side plates 11c, 11d. There are two types of box 11: those with grout holes 11h and those without.

  13 to 18 are cross-sectional views of the ground during the tunnel formation process by the R & C method following FIG.

  As shown in FIG. 13, a propulsion machine 12 such as a push jack is installed behind the box 11 inside one of the shafts 2, and the pipe 8 is removed inside the other shaft 2 on the opposite side. The gantry 13 is installed.

  Subsequently, as shown in FIG. 14, the box 11 is propelled by the propulsion unit 12 and is press-fitted into the ground wall surface. As a result, a group of box-shaped roofs 8R on the front end side are pushed out onto the gantry 13 in the other vertical shaft 2 on the opposite side and removed by a crane vehicle (not shown) or the like.

  Thereafter, as shown in FIG. 15, when the box 11 reaches a predetermined position, a part of the propulsion equipment inside one of the shafts 2 is removed. Then, as shown in FIG. 16, a new box 11 is built inside one of the shafts 2.

  Next, as shown in FIG. 17, after a propulsion unit 12 such as a push jack is installed behind the box 11, a new box 11 and an existing box 11 are propelled by the propulsion unit 12. As a result, a group of all box-shaped roofs 8R are pushed out onto the frame 13 inside the other vertical shaft 2 on the opposite side, and removed by the crane car C.

  Subsequently, after joining a plurality of boxes 11, as shown in FIG. 18, the propulsion equipment such as the propulsion machine 12 and the blade opening Bm are removed, and the space between the boxes 11 is waterproofed. In this way, a box structure is constructed.

  Next, a surveying method for the above-described survey pipe 8 will be described with reference to FIGS.

  FIG. 19 is a diagram schematically showing a state of the survey pipe 8 during attitude survey, and FIG. 20 is a front view of the survey pipe 8 at position X1 in FIG.

  As shown in FIG. 19, a laser surveying device for surveying the attitude of the surveying pipe 8 using laser light (surveying light) Lm on the propulsion unit 7 on the side of the main pushing position of the surveying pipe 8. 15 is installed. As the laser surveying device 15, for example, an inking laser device with an anti-vibration function such as a Hitachi Electronics gimbal type laser inking device UG25UY is used. For the laser light Lm, for example, a visible light semiconductor laser having a wavelength of 630 to 660 nm is used.

  As shown in FIG. 20, the laser surveying instrument 15 is arranged at the planned arrangement positions of the survey lines 10a, 10b, 10c of the survey pipe 8 (in the survey pipes 8a, 10b, 10b, It is possible to scan, for example, a cross-shaped laser beam Lm (Lmx, Lmy) in accordance with (position where 10c is disposed).

  When surveying the attitude of the survey pipe 8, the laser survey device 15 emits a cross-shaped laser beam Lm, and the laser beam Lm and survey lines 10 a, 10 b, 10 c on the inner wall of the survey pipe 8. The attitude of the pipe 8 for surveying is grasped by the relative positional relationship. That is, when the laser beam Lm and the survey lines 10a, 10b, and 10c overlap, it is determined that there is no deviation in the attitude of the survey pipe 8, and the laser beam Lm and the survey lines 10a, 10b, and 10c are separated. If it is, it is determined that there is a deviation in the attitude of the survey pipe 8. Therefore, it is possible to easily grasp whether or not the attitude of the survey pipe 8 is deviated from the management value.

  Here, FIG. 21 to FIG. 23 are examples of the case where the attitude of the survey pipe is shifted, and are cross-sectional views of the survey pipe at the position X2 in FIG.

  In FIG. 21, the laser beam Lmx is located above both the survey lines 10b and 10c. Therefore, if the state at the position X1 is the state shown in FIG. 20, it can be determined that the tip of the surveying pipe 8 is inclined downward. On the other hand, if the state at the position X1 is also the state shown in FIG. 21, it can be determined that the entire survey pipe 8 is shifted downward. Further, from the difference h1 between the line Lbc connecting the survey lines 10b and 10c and the laser beam Lmx, the shift amount of the survey pipe 8 can be grasped.

  In FIG. 22, the laser beam Lmy is located on the right side of the survey line 10a. Therefore, if the state at the position X1 is the state shown in FIG. 20, it can be determined that the tip of the surveying pipe 8 is shifted to the left. On the other hand, if the state at the position X1 is also the state shown in FIG. 22, it can be determined that the entire survey pipe 8 is shifted to the left. Further, the amount of deviation of the survey pipe 8 can be determined from the difference w1 between the survey line 10a and the laser beam Lmy.

  In FIG. 23, the laser beam Lmy is positioned on the right side of the survey line 10a, positioned above the survey line 10b, and further positioned below the survey line 10c. Therefore, it can be determined that the survey pipe 8 is shifted in the counterclockwise direction with respect to the management position. That is, by arranging the survey lines 10a, 10b, and 10c at three locations, the rotational deviation of the survey pipe 8 can be read easily and instantaneously. Also in this case, the deviation amount of the survey pipe 8 can be grasped from the difference r1 between the laser beams Lmy and Lmx and the survey lines 10a, 10b and 10c.

  As described above, in the present embodiment, the displacement direction of the survey pipe 8 (the displacement direction between the horizontal and vertical directions and the rotation direction) is determined by observing the distance between the laser beam Lm and the survey lines 10a, 10b, and 10c. Anyone can easily check it sensuously.

  Further, the deviation amount of the survey pipe 8 can be easily measured by the separation distance between the laser beam Lm and the survey lines 10a, 10b, 10c. Therefore, it is possible to improve the measurement accuracy of the deviation of the attitude of the survey pipe 8. In addition, since the amount of deviation of the attitude of the survey pipe 8 can be easily measured, the survey time can be greatly shortened.

  In the present embodiment, the attitude of the survey pipe 8 is continuously measured even when the survey pipe 8 is propelled. Thereby, when the attitude of the surveying pipe 8 is likely to deviate from the control value when the surveying pipe 8 is propelled, the propulsion of the pipe 8 can be stopped immediately. In addition, as described above, the survey pipe 8 for surveying has a high accuracy in measuring the position deviation, and the deviation can be corrected at an initial stage where the deviation is small. Therefore, the pipe 8 for surveying can be installed so as to have a more correct attitude. it can.

  When the surveying pipe 8 is propelled, the laser surveying device 15 may be affected by vibration from the propulsion unit 7, but by collimating the dowel (reference mark) 16 installed on the ground wall above the tunnel, The directionality of the error of the position of the laser surveying instrument 15 can be determined instantaneously and reflected in the surveying of the surveying pipe 8. That is, the position of the laser surveying device 15 is detected based on the information obtained by irradiating the laser beam Lm from the laser surveying device 15 to the dowel 16, and the pipe for surveying is taken into account the detection result Survey 8 postures. Thereby, the surveying accuracy of the deviation of the attitude of the pipe 8 for surveying can be improved. Further, the deviation of the attitude of the laser surveying device 15 can be measured alone.

  Further, as described above, when propelling the survey pipe 8, the trolley ZT for removing excavated soil travels within the pipe 8, but the survey lines 10b and 10c are connected to the center line of the pipe 8 in the height direction. Since the laser beam Lmx for surveying is not obstructed by the trolley ZT or the like by being installed above the CL1, the attitude of the surveying pipe 8 can be grasped even when propelled. For this reason, since the deviation can be corrected at an early stage where the deviation is small, the survey pipe 8 can be installed so as to have a more correct posture.

  In addition, a camera is installed inside the survey pipe 8, and the relative position relationship between the laser beam Lm and the survey lines 10a, 10b, and 10c is observed from the outside of the pipe 8 (the ground), and the attitude of the pipe 8 is determined. You may survey. Thereby, even if the worker inside the pipe 8 is not a skilled worker, the work can be performed according to the instruction of the outside skilled worker.

  Further, on the inner wall surface of the survey pipe 8, the circumferential direction of the survey pipe 8 from the survey lines 10 a, 10 b, 10 c is at least two places separated by a predetermined distance in the longitudinal direction of the survey pipe 8. A scale may be provided along the line. FIG. 24 and FIG. 25 are principal part sectional views along the longitudinal direction of the pipe for surveying showing an example thereof.

  As shown in FIG. 24, on the inner wall surface of the pipe 8 for surveying, a position Xa and a position Xb away from the position Xa along the longitudinal direction of the pipe 8 by the distance Xab from the survey lines 10b and 10c A scale M is provided along the direction (the width direction of the survey lines 10b and 10c).

  FIG. 25 illustrates a case where the tip side of the survey pipe 8 in FIG. 24 is inclined downward. In this case, as described above, the deviation direction of the attitude of the survey pipe 8 can be easily grasped by observing the relative positional relationship between the laser beam Lm and the survey lines 10b and 10c. Further, since the distance Xab between the positions Xa and Xb is determined in advance, the inclination angle of the survey pipe 8 can be easily derived by reading the scale M where the laser light Lm overlaps at the positions Xa and Xb.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the embodiment disclosed in this specification is an example in all respects and is limited to the disclosed technology. It should be considered not a thing. That is, the technical scope of the present invention should not be construed restrictively based on the description in the above-described embodiment, but should be construed according to the description of the scope of claims. All modifications are included without departing from the technical scope equivalent to the described technique and the gist of the claims.

  For example, in the above-described embodiment, the case where the laser beam and the survey line overlap is described. However, the present invention is not limited to this, and the laser beam and the survey line do not overlap each other when the laser beam and the survey line are difficult to see. A position where the light and the survey line are separated by a predetermined length may be set as a position where there is no deviation in the attitude of the survey pipe.

  In the above explanation, the case where the present invention is applied to the installation method of a box structure for forming an underground pedestrian crossing has been described. For example, a box for other uses such as a sewer, a conduit, or a road culvert. It can also be applied to the installation method of the body structure.

DESCRIPTION OF SYMBOLS 1 Temporary retaining pile 2 Vertical shaft 3 Bearing wall 4 Starting stand 5 Well girder frame 6 Base 7 Propulsion machine 8 Pipe 8R Box-shaped roof 9 FC plate 10a, 10b, 10c Survey line 11 Box 11a Upper slab 11b Lower slab 11c, 11d Side plate 11e opening 11f fixing material insertion hole 11g notch groove 11h grout hole 12 propulsion unit 13 mount 15 laser surveying device 16 dowel E earth R rail C crane truck ZT trolley Bm blade edge Lm, Lmx, Lmy laser beam M scale

Claims (8)

A step of installing a plurality of pipes so as to be adjacent to each other along the outer periphery of the installation area of the box structure on the ground wall;
Installing the box structure in a planned installation area of the box structure including the plurality of pipes;
Have
In the installation process of the plurality of pipes,
Surveying that has a survey line arranged on the inner wall surface at a distance of a predetermined angle along at least three locations along the circumferential direction of the pipe and that extends along the longitudinal direction of the pipe Preparing a pipe for use,
Scanning the linear laser light in accordance with the planned placement position of the survey line from the laser surveying device installed on the main push position side of the survey pipe when installing the survey pipe;
Surveying the attitude of the survey pipe from the relative positional relationship between the laser beam and the survey line;
A method for installing a box structure, comprising:   2. The box structure according to claim 1, wherein the plurality of pipes have a rectangular opening cross section, and the survey lines are provided on the upper surface of the inner wall surface of the survey pipe and on both side surfaces intersecting the upper surface. How to set things.   3. The box structure installation method according to claim 2, wherein the survey line is provided on a bottom surface of an inner wall surface of the survey pipe.   The method for installing a box structure according to claim 1, 2 or 3, wherein the survey line is provided above the center in the height direction of the opening cross section of the pipe for surveying. In the installation process of the pipe for surveying,
Detecting a position shift state of the laser surveying instrument based on information obtained by irradiating a laser beam from the laser surveying instrument to a reference mark provided on the ground wall;
A step of grasping the attitude of the pipe for surveying in consideration of the detection result of the positional deviation state of the laser surveying instrument;
The installation method of the box structure according to any one of claims 1 to 4, wherein the box structure is provided.   Scales along the circumferential direction of the survey pipe from the survey line at least two locations on the inner wall surface of the survey pipe separated by a predetermined distance along the longitudinal direction of the survey pipe The method for installing a box structure according to any one of claims 1 to 5, wherein:   The method for installing a box structure according to claim 1, wherein the survey line is provided in a detachable state.   The method for installing a box structure according to any one of claims 1 to 7, wherein a light emitting means is provided on the survey line.

Images