JPH0373700B2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (a) Field of Industrial Application The present invention provides for the construction of cast-in-place piles, continuous underground walls, etc. for vertical holes excavated underground by mud drilling or other construction methods. This invention relates to a construction device that accurately and easily erects structures such as pipes and steel columns with desired verticality in order to bury them.

(b) Conventional technology Conventionally, the following methods have been used to check whether a structure such as a steel column to be buried in an excavated vertical hole has been erected with the desired verticality. .

An appropriate mark is placed protruding on the side of the structure to be suspended by a crane, etc., and this mark is measured with a surveying instrument such as a transit installed on the ground. Based on the calculation result based on the measured value, the above-mentioned crane, etc. The position of the building was adjusted by operating the .

(c) Problems to be solved by the invention However, in the conventional method described above, the measurement of verticality and the adjustment of the construction position based on the measurement results are separate operations, and the two are not linked, so it is difficult to measure the verticality at once. During adjustment work, it is difficult to erect with high precision. Therefore, it is necessary to perform the work repeatedly to ensure a predetermined accuracy, which has the drawback of significantly reducing work efficiency.

Therefore, in the present invention, the above-mentioned measurement work and adjustment work of the construction position are linked, and the adjustment work of the construction position is performed based on the measurement results, so that the desired measurement and adjustment work can be performed in one time. The object of the present invention is to provide a construction device for an underground structure that can be constructed with high precision and efficiency according to the verticality of the construction.

[Structure of the invention]

(a) Means for Solving the Problems The gist of the present invention is that an inclination measuring unit housed in a housing and installed above a vertical hole has its tip connected to the lower end side of a structure to be erected and successively A wire material to be fed out, a means for measuring the angle and amount of the wire material being fed out from the housing, a means for measuring the inclination angle of the housing itself, and a degree of inclination based on the measured values by each of the above measuring means. It is composed of a computer that electrically calculates the verticality and outputs an electrical signal corresponding to the eccentric position compared to the desired verticality. Each of the temporary beams is supported by the inner ends of a plurality of temporary beams installed horizontally on the ground, and each of the temporary beams is supported by a plurality of height adjustment jacks installed upright on the ground. The lower end side of the structure is supported by a plurality of position adjustment jacks arranged horizontally in the vertical hole, and the height adjustment jack and position adjustment jack control a fluid pressure control device. The inclination measurement unit measures the verticality of the structure on the ground using the fed-out wire material, and uses the deviation from the desired verticality as an electric signal to send the fluid to the inclination measurement unit. This is an underground structure construction device which controls a pressure control device to correct the height adjustment jack and the position adjustment jack.

(b) Embodiment FIG. 1 is a vertical sectional view schematically illustrating a construction apparatus according to an embodiment of the present invention, and FIG. 2 is a plan view thereof.

Adjacent to the opening of a vertical hole 1 excavated by muddy water excavation, etc., a plurality of height adjustment jacks 2 (four in the embodiment) operated by fluid pressure such as oil pressure are installed in an upright state in which they expand and contract in the vertical direction. is installed in place.

The steel column 3, which is a structure to be erected, is erected into the vertical hole 1 with its upper end suspended by a crane or the like. Four temporary beams placed horizontally 4
These temporary beams 4 are supported by the height adjustment jacks 2 mentioned above.

In addition, in the vertical hole 1, there are a plurality of (in the embodiment, four
position adjustment jacks 5 are installed, and these position adjustment jacks 5 protrude from the left and right and front and back (not shown) with respect to the lower end side of the steel column 3 to press and support the steel column 3. ing.

Furthermore, at the outer end of each temporary beam 4, there is a horizontal position adjustment jack 7 that can press the temporary beam 4 horizontally in the direction of the steel column 3, and a horizontal position adjustment jack 7 that can press the temporary beam 4 in the circumferential direction of the vertical hole 1. A rotary adjustment jack 8 is provided.

Next, an inclination measuring unit A is installed on the ground, and the wire material 13 fed out from this unit A is
The tip is connected to a hook 6 protruding from the steel column 3.

This inclination measurement unit A has almost the same configuration as that disclosed in Japanese Patent Application Laid-open No. 58-33113, which was previously proposed by the applicant of this case, and its outline is shown in Fig. 3 and below. This will be explained using a partially cutaway side view and a front view shown in FIG.

First, the measuring unit A is divided into upper and lower parts, and a torque motor 11 is installed inside the upper box body A1, and a winding drum 12 attached to the rotating shaft of this motor is equipped with a strong wire material 13 such as fishing line or piano wire. are connected and wound, and the other end is sent out to a communicating lower box body A2 whose inner surface is equipped with a heat insulating material 14.

The lower box body A2 is provided with an exhaust cooling fan 15 at the upper part of the side surface and an intake port 16 at the lower part of the side face, and an inclinometer 17 is fixed to the box body so that it always swings and performs other operations. Equipped.

Next, the wire material 13 fed from the winding drum 12 is stretched between the movable pulley 18 and the fixed pulley 19, and is sent out to the outside through the entrance/exit 20 provided on the lower side of the lower box body A2.

The movable pulley 18 has upper and lower ends each connected to the lower box body A2.
Two rails 2 erected in parallel supported by
1 and 21, and by suspending a weight 24 from this support shaft 23, the movable pulley 18 is always pulled downward with a constant tension, and the wire material 13 is Constructed to prevent loosening. Further, the rotating shaft of a rotary encoder 25 whose main body is fixed to the lower box body A2 is connected to the support shaft 19a of the fixed pulley 19, so as to generate a predetermined number of pulse signals commensurate with the amount of passage of the line condition 13. It is configured.

Also, the wire material 1 between the fixed pulley 19 and the entrance/exit 20
On the passage No. 3, a projector 26 that sandwiches the wire material and irradiates a parallel beam such as a laser beam is installed on one side.
On the other side, a light receiver 27 that receives parallel light beams from a light projector and generates a corresponding electric signal is provided in an opposing manner. The light receiver 27 has a built-in image sensor formed by a large number of integrated phototransistors arranged in a straight line as light receiving elements.

Furthermore, a wiping tool 28 and a water nozzle 30 are arranged adjacent to each other near the entrance/exit 20 at the lower end of the lower box A2.
In this wiping tool 28, when the wire material 13 is wound, a plunger protrudes and brushes attached at the tip are brought into contact with both sides of the wire material to wipe off muddy water attached. Water is injected onto the wire material 13 via a solenoid valve 29 that opens a flow path during winding.

Further, a circuit board P for performing calculations and other signal processing based on the values measured by the inclinometer 17, rotary encoder 25, receiver 27, etc. is built in the lower box A2.

Next, FIG. 5 is a block diagram showing a configuration for performing measurement signal processing including the measurement unit A described above.

In the figure, reference numeral 31 is an angle detection circuit, 32 is a counter, 33 is an amplification and A/D conversion circuit, 34 is a microcomputer equipped with memory, arithmetic and decoder circuits, etc., and 35 is the height adjustment jack 2. This is a fluid pressure control device that operates the position adjustment jack 5.

Next, the operation and effect of the construction device having the above configuration will be explained.

First, the steel column 3 is suspended by a crane or the like, and the steel column 3 is erected in the vertical hole 1 in such a manner that the temporary beam 4 supporting the steel column 3 is supported on the height adjustment jack 2.

Whether or not the erected steel column 3 is in a predetermined position with respect to the vertical hole 1 is determined by the steel column 3 protruding above the ground.
The upper end side is measured with a surveying instrument such as a transit, and if it is deviated, the horizontal adjustment jack 7 or the rotation adjustment jack 8 is operated appropriately to adjust it to a predetermined position.

The tip of the wire material 13 of the inclination measurement unit A is connected in advance to the hook 6 provided on the lower end side of the steel frame column 3 to be erected, and the counter 32 in this inclination measurement unit A It is reset to zero while the lower end of the pillar 3 is on the ground. The amount of the wire material 13 that is sequentially paid out in conjunction with the erection of the steel column 3 is calculated by counting the number of pulses generated by the rotary encoder 25 linked to the rotating fixed pulley 19 by the counter 32. The microcomputer 34 that receives this calculates the length D.

The verticality of the steel column 3 is measured by the inclination measurement unit A in the following manner.

A parallel beam of light such as a laser is emitted from the projector 26,
The light is irradiated toward a light receiver 27 equipped with an image sensor made of approximately 20μ photodiodes arranged in a straight line, and these light emitters 26 and light receivers 2
When the wire rod 13 inserted between 7 blocks the passage, the output signal level of the blocked part decreases, and is converted into an appropriate angle signal by the angle detection circuit 31 containing a comparator etc., and then sent to the microcomputer 34.
memorize the inclination angle.

Therefore, the inclination angle α of the steel column 3 at the predetermined length D is stored in the microcomputer 34 as a measured position signal.

Furthermore, the angle α0 at which the measurement unit A itself is inclined with respect to the vertical line is determined by converting the output signal of the inclinometer 17, which is measured as a minute analog value, into a digital value at a predetermined level by the amplification and A/D conversion circuit 33. , are stored in the microcomputer 34.

In this way, each microcomputer 34
The calculation formula X=D(α-α0) for calculating the eccentric position computer 3
4, and the offset position X calculated from this calculation formula is input to the control device 35.

Then, the control device 35 sends fluid pressure suitable for the eccentric position X to the height adjustment jack 2 and the position adjustment jack 5 to operate each jack,
The control device 3
5, the respective jacks 2 and 5 are adjusted so that the steel column 3 can be placed in a desired erection position.

For the steel column 3 that has been erected in a specified manner,
Fix by pouring concrete into vertical hole 1.

Incidentally, the steel column 3 is not necessarily erected vertically, but can also be erected at a desired inclination angle set in the microcomputer 34 in advance.

〔Effect of the invention〕

As is clear from the above embodiments, according to the construction apparatus of the present invention, the verticality of an erected structure such as a steel column can be easily and highly accurately measured by the slope measurement unit A installed on the ground, and the measured value The construction position can be adjusted by controlling the height adjustment jack and the position adjustment jack, which are operated by fluid pressure, based on the amount of deviation from the desired position calculated from the above.

Therefore, work efficiency and construction accuracy can be significantly improved compared to the conventional method described above.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the device of the present invention;
Fig. 2 is a plan view of the same, Fig. 3 is a partially cutaway side view showing the inclination measurement unit, Fig. 4 is a front view of the same, and Fig. 5 is a block diagram showing the measurement signal processing section including the measurement unit. It is. [Explanation of symbols] 1... Vertical hole, 2... Height adjustment jack, 3... Steel column (erected structure), 4
... Temporary beam, 5 ... Position adjustment jack, 6,3
8...Hook, 7...Horizontal position adjustment jack,
8... Rotation adjustment jack, 13... Wire material, 1
7... Inclinometer, 25... Rotary encoder,
26... Emitter, 27... Light receiver, 31... Angle detection circuit, 32... Counter, 33... Amplification and A/D conversion circuit, 34... Microcomputer, 35... Control device, A... Inclination measurement unit, D: unreeling length of the wire material, X: deviation amount, α: inclination angle of the wire material, α0: inclination angle of the measurement unit with respect to the vertical line.

Claims (1)

[Claims] 1. The inclination measurement unit, which is housed in the housing and installed above the vertical hole, is connected to the wire material whose tip is connected to the lower end of the structure to be erected and is sequentially fed out, and the wire material housing of the wire material. A means for measuring the feeding angle and amount of feeding from the casing, a means for measuring the inclination angle of the casing itself, and electrically calculating the degree of inclination based on the measured values by each of the measuring means, and comparing it with the desired verticality. The upper end of the structure, which is suspended from the ground and built in a vertical hole, is connected to multiple temporary beams placed horizontally to the ground. Each of the temporary beams is supported by a plurality of height adjustment jacks set up on the ground, and the lower end of the structure is horizontally inserted into the vertical hole. Each of the height adjustment jacks and the position adjustment jacks are telescopically operated via a fluid pressure control device, and the drawn out wire is Depending on the conditions, the inclination measurement unit measures the verticality of the structure on the ground and uses the amount of deviation from the desired verticality as an electric signal to control the fluid pressure control device, and controls the height adjustment jack. A construction device for an underground structure that is configured to operate the position adjustment jack in a corrective manner.