CN211121222U - Pile foundation center point throwing instrument - Google Patents

Abstract

The utility model relates to a pile foundation construction tool technical field, a pile foundation center appearance of throwing, its characterized in that: the intersection center of cross arm telescopic link installs laser module, and the circular air level of laser module top installation, the other folding mirror of installation of circular air level, the arm telescopic link have and set up height adjusting screw, and the material of arm telescopic link is stainless steel or aluminum alloy. The beneficial effects of the utility model reside in that: can be with 4 pile foundation pile position fender pile point cement nails of measuring laying-out hand over fast and go out the pile foundation center to throw out the pile foundation central line perpendicularly to pile hole bottom direction with visible laser, pile foundation center throw some appearance as the hole stage used repeatedly's of pile foundation excavation marking tool, replace the rope hand over and hang the loaded down with trivial details work that the hammer ball comes the throw, not only can throw the point at the stage of digging the hole and guide the excavation direction, also can regard as the datum line of digging hole back quality inspection acceptance.

Description

Pile foundation center point throwing instrument

Technical Field

The utility model relates to a pile foundation construction tool technical field especially relates to a pile foundation center appearance of throwing that is arranged in civil construction, pile foundation engineering among highway and the railway bridge engineering.

Background

With the rapid development of the construction of highways, highways and cities in China, a large amount of infrastructure projects such as various bridges and high-rise buildings are constructed, and foundation engineering technology is rapidly developed. The pile foundation has the advantages of small influence on the surrounding environment and adjacent buildings, capability of penetrating various complex stratums, adaptability to various geological conditions, good stability, large bearing capacity, small settlement, good earthquake resistance and the like, and is widely applied to various infrastructure projects. Pile foundation hole site center location is crucial to the quality of pile foundation, and pile foundation pile hole excavation construction generally needs the laying out 4 fender pile points and marks on the fore shaft with the cement nail, need constantly resume pile foundation central point and throw some to the hole bottom with these 4 points in the excavation work progress to package card pile foundation pile hole can not produce the offset. In the prior art, the ropes are thrown by a hammer ball hanging method after being converged, so that the defects of more personnel, high labor intensity, more occupied time, low throwing quality and the like are required for operation.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a pile foundation center spot-putting instrument, which comprises a laser module (1), a circular level bubble (2), a bracket telescopic rod (3), a height adjusting screw (5) and a laser module protective tube (9); the top end of the laser module (1) is fixedly connected with the round level bubble (2), the laser module (1) is provided with a laser module switch (8), the laser module (1) is inserted into the laser module protective tube (9), and the laser module switch (8) is clamped in a reserved hole in the laser module protective tube (9); the support telescopic rod (3)) comprises a support (34), a telescopic joint (33), a connecting piece (32) with an arc-shaped clamping groove and a support leg (31), wherein holes are formed in the centers of the two supports (34) and are movably connected through a laser module protective pipe (9), so that the two supports (34) can freely rotate relatively; the two sides of the inner wall of the bracket (34) are provided with limit clamps (341) and limit clamp grooves (331) on the corresponding expansion joint (33) to ensure the straightness and stability of the expansion joint during expansion; the arc-shaped clamping grooves at the two ends of the connecting piece (32) are respectively and movably connected with the cylindrical clamping heads at the end parts of the telescopic joint (33) and the bracket leg (31), and the telescopic joint (33) and the connecting piece (32) are adjusted to enable the tail end of the telescopic rod (3) of the bracket to be propped against the pile protection point cement nail (6); the bracket legs (41) are provided with height adjusting screws (5), the state of the circular level bubble (2) reflected out of the folding mirror (4) arranged on the bracket (34) is observed from a proper angle, and the circular level bubble (2) can be leveled by rotating the height adjusting screws (5); the tail ends of the support legs (31) are designed into a V shape, so that the support legs can be conveniently clamped into the fender pile point cement nails (6).

The utility model discloses a use like this:

1. the method comprises the following steps of calibrating a pile foundation center throw-in instrument, taking down a laser module (1) and a circular air level (2) fixedly connected with the laser module, fixing the laser module and the circular air level on an overhead frame with the height of more than 20 meters, the edge of an overhead bridge, the edge of a high building or a tower crane, commanding by using theodolites which are vertical to each other to enable a laser emitting port and a ground laser spot to be on a vertical line, and adjusting screws of the circular air level (2) to enable the air level to be centered; this step is a vertical alignment of the laser beam, which typically requires calibration once in 3 months.

2. When the pile foundation center throw-point instrument is used, the telescopic rod (3) of the support is opened in a rotating mode by approximately 90 degrees, the laser module (1) and the circular level bubble (2) are inserted into the laser module protective pipe (9), the laser module switch (8) is opened, and the folding mirror (4) rotates randomly between 0 and 180 degrees. Adjusting to an angle suitable for observing the round level bubble (2); the support telescopic rods (3) are oppositely stretched by 2 persons, 2 pile protection point cement nails (6) which are symmetrical are tightly propped by V-shaped grooves at the ends of the support legs (3), and the other group of support telescopic rods (3) is erected. If the support telescopic rod (3) is obviously uneven due to the fact that the foundation pile locking opening (7) is uneven, the stone sheet can be padded under the height adjusting screw (5) on the lower side, 2 persons can adjust the height adjusting screw (5) at the adjacent position at the same time, and the circular level bubble (2) is observed to be centered through the folding mirror; and the downward projection of the laser spot is the mark of the design center position of the pile foundation.

The beneficial effects of the utility model reside in that:

based on the advantages of laser pointing, a combination device is designed by combining circular level bubbles and an adjusting bracket, and the high-precision design center mark of the pile foundation with 4 intersected pile protection points can be projected to the bottom of the hole of the pile foundation quickly;

a. a pile foundation center throwing instrument is used as a marking tool repeatedly used in a pile foundation hole digging stage, and replaces the complicated labor of throwing by hanging hammer balls by ropes in a crossed manner;

b. a pile foundation center point throwing instrument can quickly throw points to calibrate a pile foundation center line to guide the excavation direction in the hole excavation stage;

c. the pile foundation center point throwing instrument can also be used as a pile foundation center datum line for quality acceptance after hole digging, and is convenient for detecting the vertical condition and the ultra-short condition measurement of a pile hole;

d. the pile foundation center point throwing instrument has the advantages that the point throwing is quick, and the marking precision is high relative to the drop hammer ball point throwing;

e. the point throwing of the pile foundation center point throwing instrument can be completed by only 2 persons, and the personnel operate at the safe position of a hole site.

Drawings

FIG. 1 is a schematic view of the overall structure and usage of the present invention;

FIG. 2 is a schematic structural view of the height adjustment part of the present invention;

FIG. 3 is an enlarged view of a portion of the laser module of the present invention;

FIG. 4 is an enlarged view of the telescopic rod of the bracket of the present invention;

FIG. 5 is an enlarged view of the fender post point cement nail of the present invention;

fig. 6 is an enlarged cross-sectional view of the telescoping rod a-a of the stent of fig. 4.

In the figure: 1. the laser module, 2, circular air level, 3, support telescopic link, 4, folding mirror, 5, height adjusting screw, 6, fender pile point cement nail, 7, pile foundation fore shaft, 8, laser module switch, 9, laser module pillar, 31, support leg, 32, connecting piece, 33, telescopic joint, 34, support, 331, spacing draw-in groove, 341, spacing card.

Detailed Description

Example 1: a pile foundation center throw-in instrument comprises a laser module (1), a circular level bubble (2), a support telescopic rod (3), a height adjusting screw (5) and a laser module protective pipe (9); the method is characterized in that: the top end of the laser module (1) is fixedly connected with the round level bubble (2), the laser module (1) is provided with a laser module switch (8), the laser module (1) is inserted into the laser module protective tube (9), and the laser module switch (8) is clamped in a reserved hole in the laser module protective tube (9); the support telescopic rod (3) comprises a support (34), an expansion joint (33), a connecting piece (32) with an arc-shaped clamping groove and a support leg (31), and the support telescopic rod (3) is made of high-strength light materials; holes are formed in the centers of the two supports (34) and are movably connected through the laser module protective tube (9), so that the two supports (34) can freely rotate relatively; the two sides of the inner wall of the bracket (34) are provided with limit clamps (341) and limit clamp grooves (331) on the corresponding expansion joint (33) to ensure the straightness and stability of the expansion joint during expansion; the arc-shaped clamping grooves at the two ends of the connecting piece (32) are respectively and movably connected with the telescopic joint (33) and the cylindrical clamping head at the end part of the bracket leg (31); height adjusting screws (5) are arranged on the bracket legs (31), the state of the circular level bubble (2) reflected out of the folding mirror (4) arranged on the bracket (34) is observed from a proper angle, and the circular level bubble (2) can be leveled by rotating the height adjusting screws (5); the tail end of the bracket leg (31) is designed into a V shape.

The support telescopic rod (3) is made of stainless steel or aluminum alloy.

The above examples are merely examples for clearly illustrating the operations and are not limiting on the embodiments; other variations and modifications will be apparent to persons skilled in the art in light of the above description; this is not necessary, nor exhaustive, of all embodiments; and obvious variations or modifications therefrom are within the scope of the invention.

Claims (3)

1. A pile foundation center throw-in instrument comprises a laser module (1), a circular level bubble (2), a support telescopic rod (3), a height adjusting screw (5) and a laser module protective pipe (9); the method is characterized in that: the top end of the laser module (1) is fixedly connected with the round level bubble (2), the laser module (1) is provided with a laser module switch (8), the laser module (1) is inserted into the laser module protective tube (9), and the laser module switch (8) is clamped in a reserved hole in the laser module protective tube (9); the support telescopic rod (3) comprises a support (34), an expansion joint (33), a connecting piece (32) with an arc-shaped clamping groove and a support leg (31), and the support telescopic rod (3) is made of high-strength light materials; holes are formed in the centers of the two supports (34) and are movably connected through the laser module protective tube (9), so that the two supports (34) can freely rotate relatively; the two sides of the inner wall of the bracket (34) are provided with limit clamps (341) and limit clamp grooves (331) on the corresponding expansion joint (33) to ensure the straightness and stability of the expansion joint during expansion; the arc-shaped clamping grooves at the two ends of the connecting piece (32) are respectively and movably connected with the telescopic joint (33) and the cylindrical clamping head at the end part of the bracket leg (31); height adjusting screws (5) are arranged on the bracket legs (31), the state of the circular level bubble (2) reflected out of the folding mirror (4) arranged on the bracket (34) is observed from a proper angle, and the circular level bubble (2) can be leveled by rotating the height adjusting screws (5); the tail end of the bracket leg (31) is designed into a V shape.

2. The pile foundation center casting instrument of claim 1, wherein: the folding mirror (4) can rotate freely between 0 and 180 degrees.

3. The pile foundation center casting instrument of claim 1, wherein: the support telescopic rod (3) is made of stainless steel or aluminum alloy.

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