JP3030377B2 - Construction and repair equipment for trussed pillars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for installing and repairing a straight pillar by a reverse strike method.

[0002]

2. Description of the Related Art In recent years, the size of underground structures has been increasing along with the rise of buildings, and the effect of the reverse construction method has been recognized in terms of shortening construction, improving safety, and preventing pollution, and demand for construction has increased. ing.

[0003] In general, it is often used for large-scale construction on soft ground in an urban area. Recently, however, there is also a case where the superiority is recognized in the construction of small and medium-sized buildings.

[0004] The reverse striking method is to excavate from the upper floor to the lower floor sequentially from the upper floor to the lower floor while using the main body of the building as a shore support without constructing the underground skeleton with a temporary cutting beam support. This is a construction method that repeats construction.

[0005] After the excavation is completed, the construction method in which concrete is poured sequentially from the lowest floor to the upper floor (progressive construction method)
In the case of the reverse striking method, this name is given because the construction of the skeleton is advanced while excavating from the first floor to the B1 floor and then the B2 floor to the lower floor.

[0006] In the construction work of a straight pillar in the reverse driving method, a method of building after casting a cast-in-place pile has become mainstream.
FIG. 12 shows the construction order.

[0007] Retaining wall construction, pile construction, construction of straight pillars, 1F floor excavation, primary excavation, BF steel beam temporary construction, ground steel construction, B1F floor placement, secondary excavation, B2F floor placement Tertiary excavation, B3F floor placement, final excavation, B4F floor placement, foundation placement

[0008] In the reverse hitting method as described above, since a beam and a slab are erected as a supporting structure on the main body and excavated to a predetermined depth, a large-section H-section steel (hereinafter, referred to as a timber structure) serving as a central portion of a column is provided. Pillars) must be set up vertically.

At present, most of the timber-column construction work employs cast-in-place piles, and the shape of the timber column is becoming larger and longer. Accompanying this, the excavation accuracy of piles and the installation accuracy of timber pillars have become quite strict, and the development of higher-precision installation methods and equipment has become necessary.

[0010] In the supporting pillar mounting device disclosed in Japanese Patent Publication No. 59-42143, the fixed position can be adjusted by freely moving in one direction via a rail 2 laid on a base frame 1 as shown in FIG. A lower cart 3 is provided, and an upper cart 5 is provided via a rail 4 laid on the lower cart 3 so as to be movable in a direction orthogonal to the direction of movement of the lower cart 3 so that the fixed position can be adjusted. A rotatable table 6 which can be rotated 360 degrees to adjust the fixed position is provided, and the rotatable table 6 is provided with a supporting column 7 (straight column) supporting jack 7.
A support column (straight column) mounting device provided with a plurality of pairs of column guide devices in which the base of the arm 8 with the guide roller which can be freely moved is movable in the radial direction so that the fixed position can be adjusted. It is shown.

[0011] As for the method of installing the support pillar (steel pillar), although not shown, a casing is pressed into the ground,
After excavating the inside of the casing and placing a reinforced concrete foundation at the bottom thereof, the above-mentioned building device is installed on the ground.

[0012] Then, through this device, a supporting true pillar (straight pillar) is suspended in the casing, and the lower end of the supporting true pillar is smashed into the cast concrete to form the supporting true pillar building apparatus. The support pillar is supported by a jack 7 provided thereon so that the height of the support pillar can be adjusted, and the support pillar is sandwiched by a pillar guide device including an arm 8 with a guide roller provided in the penetrating portion. After centering the support pillar by means of the device and a plurality of sets of adjusting jacks arranged between the support pillar and the casing, the cast concrete is cured.

[0013]

In the conventional construction apparatus, since the jack 7 for height adjustment is a hydraulic jack, there is a danger that the jack 7 will sink in a stationary state at the time of support, and the turntable 6 can move this finely. I couldn't say. Furthermore, since the guide roller of the arm 8 with a guide roller comes into contact with the flat portion which is the side surface of the straight pillar, side slippage or the like may occur, and a reliable guide may not be obtained.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art, to provide an apparatus for installing and repairing a straight pillar that can be finely adjusted and hardly cause twisting or eccentricity during movement. It is in.

[0015]

According to the present invention, in order to attain the above object, a lower frame fixed to a standpipe by a fixing bracket and two ball screw shafts positioned on opposing surfaces on a rail are rotated to move. It consists of a horizontal moving platform, a turntable type rotating platform using a reduction gear in the motor part using a slewing ring gear, a straight column level adjustment jack using a journal jack, and a guide roller supported at the corner of Yatko, The gist of the present invention consists of a built-in gantry composed of the lower gantry and an upper gantry detachably connected with pins, and a lower correction device with a pantograph jack fixed to an upper portion of the stand pipe with a connecting metal and an upper fixing metal. Things.

[0016]

According to the present invention, the position and the level of the vertical columns located on the ground are adjusted by the mounting stand, the inclination of the vertical columns is corrected by the lower correction device, and the installation accuracy is managed by the inclinometer. As expected,
The lower pedestal that adjusts the height when the top end of the trussed pillar is higher than the ground surface is fixed to the stand pipe with fixing brackets, so there is no danger of eccentricity due to impact, move the trussed pillar to the fixed position and set The horizontal moving pedestal moves by rotating the ball screw shaft, so that no twist is generated during the movement, and accurate adjustment is possible by using the ball screw shaft.

Further, since the rotating base for adjusting the directionality (torsion) of the straight pillar uses a revolving ring gear,
Accurate adjustment is possible, and since a reduction gear is used in the motor section, the rotation speed can be adjusted and the operability is good. In addition to this, the trussed pillar level adjusting jack for finely adjusting the trussed pillar level has no displacement after setting due to the use of the journal jack.

The guide roller moves the straight pillar up and down while the yacht is fixed to the gantry. However, the use of the roller makes it easy to move up and down. No twist or eccentricity.

Furthermore, the power of each operating unit uses a motor, and can be remotely controlled by a remote controller.

In addition to this, the position of the lower correction jack as the lower correction device is automatically determined by setting the upper fixing bracket at a fixed position.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical sectional side view showing one embodiment of a vertical pillar building apparatus according to the present invention, FIG. 2 is a plan view of the same, and a mounting stand 9 is separable into a lower stand 10 and an upper stand 11. is there.

The lower base 10 has an insertion portion at the center thereof into which the upper end of the stand pipe 12 is inserted, and an end portion protrudes from the insertion portion, and a screw-type pressing handle is used as a fixture for pressing and fixing the outer periphery of the stand pipe 12. 13 is provided.

The upper gantry 11 is placed on the lower gantry 10,
It is fixed with four lock pins.
A connecting metal fitting 14 and an upper fixing metal 15 of a lower correcting device made of H-shaped steel are provided inside the inside 12, and a pantograph jack 25 as a lower correcting device to be described later is attached to the upper part of the stand pipe 12 by the connecting metal 14 and the upper fixing metal 15. Fixed to.

The upper gantry 11 further includes a horizontal moving gantry 17 that is moved by rotating ball screw shafts 18 and 19 serving as two horizontal sliding screw jacks located on opposing surfaces on the rail 16, and a slewing ring gear 20. A turntable type rotary base 21 using a reduction gear 22 in the motor section, a straight column level adjustment jack using a journal jack 23 erected on the rotary base 21, a guide roller supported at the corner of the yatco 24 Consists of 27.

In the figure, reference numeral 28 denotes a level adjusting jack, and 29a denotes a motor for turning the rotary base 21, to which a speed reducer 22 is connected.
29b is a motor for rotating the ball screw shafts 18 and 19, and 29c is a motor for extending and retracting the level adjusting jack 28.

A straight pillar adjusting member 30 having a connecting plate 31 is provided below the yatco 24, and the straight pillar 34 is connected via the connecting plate 31.

As shown in FIG. 5, the rail 16 is oil-less without wheels, and the guide roller 27 is provided at the end of a guide arm 32 provided on the rotary base 21 so as to be able to be turned up and down toward the center. As shown in FIG. 6, it is a grooved roller having a V-shaped cross section so as to abut the corner of the square yatco 24.

FIG. 4 shows details of the lower correction device, and FIGS. 7 and 8 show details of the pantograph jack 25. The pantograph jack 25 is provided with a contact roller 25b at the end of a telescopic arm 25a as a link arm. One end of the arm 25a is fixed to the stand pipe 12 side, and the other end is pulled up or down by an operating rod 25c such as a manual pump.

The pantograph jack 25 is not fixed directly to the stand pipe 12 side, but is provided at the tip of a distance adjusting member 33 if necessary. It is connected with the reaction board 39 arranged on the corner. An inclinometer 35 is provided on the side of the vertical shaft 34.

Next, the construction work of a straight pillar using the above-mentioned construction apparatus will be described. FIG. 9 is a flowchart, and there is an excavation work prior to the construction work of the timber pillar.

In the excavation work, a power jack is set on a pile core, and a stand pipe 12 is built with the power jack.
The inside of the stand pipe 12 is excavated with a hammer. Then, a drilling machine such as an earth drill machine (drill bucket) and a pile core are set and drilled, and the expanded bottom is excavated to perform primary slime treatment with an expanded bucket.

After the measurement of the hole wall, the construction work of the trussed pillar is started, the hole bottom slime treatment and the secondary slime treatment are performed, and the reinforced cage is built.

Next, the lower gantry 10 is fixedly installed on the stand pipe 12 by pressing handles 13 attached in four directions. At this time, the lower gantry 10 is cured with an iron plate at the lower part, and is lowered in advance with a ruler attached to the lower gantry 10 so that the lower gantry 10 is set in accordance with the center of the column.

After the installation of the lower base 10 is completed, a tremy tube is erected, and a slope is provided.

Thereafter, as a lower correction jack installation, a pantograph jack 25 is inserted into the stand pipe 12 by four Hs.
It is hung with a connecting metal fitting 14 made of steel and fixed to the stand pipe 12 with an upper fixing metal fitting 15.

In addition, as the installation stand 9, an upper stand
Hang 11 on the upper part of the lower gantry 10 and fix it with lock pins. In addition, as a level correction of the built-in gantry 9, the horizontal level is adjusted by a level adjusting jack 28 provided on the upper gantry 11, and the trussed pillar 34 is hung down with the Yatko 24 connected to the upper part thereof.

As a preparatory work for the construction of the straight pillar prior to the construction of the straight pillar 34, the straight pillar 34 is connected to the Yatco 24. For this connection, there are a method of attaching the trussed pillar 34 while lying on the ground, and a method of attaching the trussed pillar 34 to a temporary hole with one end left.

The straight pillar 34 is blacked out, suspended and raised, and the inclinometer 35 is set to zero. This 0 setting is measured with the transit 41 with the line connecting the center of the lower end and the upper end of the straight pillar 34 as a center line in a standing state, considering the distortion of the straight pillar 34.
0 is set when 34 is vertical. As shown in FIG. 10, the lower part of the trussed pillar 34 was fixed on the gantry 9 while suspended by a crane as shown in FIG.
With the adjustment wire 42 being stretched by the lever block 43, the truss pillar 34 is prevented from swinging. Left and right fine adjustments are made with four lever blocks 43.

When suspending the straight pillar 34, the straight pillar 34 is suspended with the guide arm 32 having the guide roller 27 at the tip raised, and the yaw screw 24 is attached to the guide roller 27.
At this point, the guide arm 32 is lowered and fixed.

As a fixed position set, the value of the scale 44 attached to the yatco 24 is read at the time of zero adjustment of the vertical shaft 34, and the fixed value is set at the fixed position while measuring the transit from three directions based on the value.

As shown in FIG. 11, before inserting the concrete column 34 into the ready-mixed concrete, the inclination of the vertical column 34 is reduced to zero by the pantograph jack 25.
Insert it in the state. In the case where the container is inclined after the ready-mixed concrete is inserted, the container is pulled out to a position where the inclination is 0, and the straight pillar 34 is inclined and inserted in a direction opposite to the inclined direction. The above operation is repeated until the accuracy is within 1/500.

The inclination of the vertical shaft 34 is measured by an inclinometer 35. By inputting the length, direction, and correction value of the vertical shaft 34 to a computer, the inclination of the vertical shaft 34 is calculated. The amount of eccentricity at the lower end is displayed and managed by this.

As described above, the lower portion of the vertical shaft 34 can be corrected by pushing the lower portion of the vertical shaft 34 with the pantograph jacks 25 installed at four locations in the vertical direction (the X-axis and Y-axis directions). Although the inclination is corrected, each pantograph jack 25 is connected by a variable arm 38 attached to the reaction board 39, and in the case of a straight column eccentric from the pile center, the mounting position on the reaction board 39 is changed. To deal with it.

[0044]

As described above, the apparatus for mounting and repairing a straight pillar according to the present invention can perform fine adjustment of fineness.
Twisting and eccentricity are less likely to occur during movement.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a straight pillar installation / repair device of the present invention.

FIG. 2 is a vertical sectional side view of a main part showing one embodiment of a straight pillar installation / repair device of the present invention.

FIG. 3 is a cross-sectional plan view of a main part showing one embodiment of the straight pillar installation / repair device of the present invention.

FIG. 4 is a plan view of a lower correction device portion.

FIG. 5 is a front view of a rail.

FIG. 6 is a cross-sectional plan view of a guide roller.

FIG. 7 is a side view of the pantograph jack in a contracted state.

FIG. 8 is a side view of the pantograph jack in an extended state.

FIG. 9 is a flow chart of the construction work of the timber pillar.

FIG. 10 is a side view showing a treadmill column preparatory work.

FIG. 11 is a side view showing the installation of a straight pillar.

FIG. 12 is an explanatory diagram of a reverse driving method.

FIG. 13 is a cross-sectional plan view showing a conventional straight-column building device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base frame 2 ... Rail 3 ... Lower trolley 4 ... Rail 5 ... Upper trolley 6 ... Rotary stand 7 ... Jack 8 ... Arm with a guide roller 9 ... Standing gantry 10 ... Lower gantry 11 ... Upper gantry 12 ... Stand pipe 13 ... Pressing handle 14… Connecting bracket 15… Upper fixing bracket 16… Rail 17… Horizontal moving base 18, 19… Ball screw shaft 20… Slewing ring gear 21… Rotating base 22… Reducer 23… Journal jack 24… Yatco 25… Pantograph jack 25a… Telescopic arm 25b ... Contact roller 25c ... Operation rod 27 ... Guide roller 28 ... Level adjustment jack 29a, 29b, 29c ... Motor 30 ... Structural pillar adjustment material 31 ... Connecting plate 32 ... Guide arm 33 ... Distance adjustment material 34 ... Structure Pillar 35 ... Inclinometer 38 ... Variable arm 41 ... Transit 42 ... Adjustment wire 43 ... Lever block 44 ... Scale

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiromi Kanayama 4-9-19-1 Hokuei, Urayasu-shi, Chiba Tokyo Co., Ltd. (56) References JP-A-7-3825 (JP, A) Japanese Patent Publication No. 59 −42143 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 13/00-13/04

Claims (1)

(57) [Claims] 1. A motor unit using a lower gantry fixed to a standpipe by a fixing bracket, a horizontal moving gantry moving by rotating two ball screw shafts located on the rail on opposing surfaces, and a slewing ring gear. A turntable type rotary mount using a reducer, a straight pillar level adjustment jack using a journal jack, a guide roller supported at the corner of the yatco, and an upper mount detachably connected to the lower mount and a pin. And a lower fixing device using a pantograph jack fixed to the upper part of the stand pipe with a connecting metal fitting and an upper fixing metal.