CN214308640U

CN214308640U - Drilled pile verticality measuring device

Info

Publication number: CN214308640U
Application number: CN202120298864.1U
Authority: CN
Inventors: 苏明; 隆锋; 钟柏荣; 刘鹏; 崔雪东; 张成凤
Original assignee: CCCC Tunnel Engineering Co Ltd
Current assignee: CCCC Tunnel Engineering Co Ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-09-28
Anticipated expiration: 2031-02-02

Abstract

The utility model discloses a bored pile straightness measuring device that hangs down, including pile body, plumb bob, reflection of light strip, target paper, flashlight and telescope. The drilled pile is a cylinder, the whole pile position is inclined and deviated during deviation, and the deviation position of the drilling machine can be judged by measuring four points. The four points are mainly positioned on the inner side and the outer side of the foundation pit and on the two sides of the foundation pit in the direction. After the deviation of the drilling machine is judged, the direction of the drilling machine is adjusted by continuously judging the inclination direction of the plumb bob according to the analysis. Because the pipeline in the hole is insufficient, the upper part of the plumb bob is fully adhered with the reflective strip on site, and the flashlight can conveniently reflect light when the flashlight is irradiated on the reflective strip. Because the plumb bob is only 5cm, 1 telescope is configured on site for convenient viewing, thereby facilitating the direct viewing of the plumb bob and the target paper at the bottom of the hole. The problem that the perpendicularity error of the drilled pile is large in the construction process is solved, and the perpendicularity precision measurement mode of the drilled pile is greatly improved.

Description

Drilled pile verticality measuring device

Technical Field

The utility model relates to a bored pile straightness measuring device that hangs down belongs to construction monitoring technology field.

Background

Dry hole refers to pore-forming mode in the pile foundation engineering, because the geology is firm closely knit, need not other supplementary pore-forming material or equipment during the drilling, directly creep into can. The dry hole process is the simplest process in rotary drilling construction, and is characterized in that: simple process and low construction cost. The dry hole process is directed to hard plastic, hard geology, with or without groundwater, but preferably without groundwater. Before the dry hole process is adopted, the conditions of rock soil and underground water must be mastered on the premise of no hole collapse.

Although the problem of hole collapse is not needed to be worried about, the drilling resistance of certain strata is improved due to loss of lubrication, softening, temperature reduction and buffering of water and slurry, particularly, dense dry soil and coarse sand layers are obvious, slag pouring is difficult, and drilling tooth loss and drill rod vibration are aggravated. Besides simple process and low construction cost, under the specific geological condition, the mudstone is softened when meeting water and lubricated by slurry, so that the phenomena of slipping, tooth plugging and lake bottom are formed. The drilled pile can eliminate the phenomenon and improve the shearing and crushing efficiency.

Perpendicularity is the tolerance requirement for controlling the included angle of a measured element and a reference element to be 90 degrees in direction tolerance, and is divided into perpendicularity requirements of a given plane, a given direction and any direction. And evaluating the vertical state between straight lines, between planes or between the straight lines and the planes according to the characteristics of the measured element and the reference element. One of the straight lines or the planes is an evaluation reference, the straight line can be a straight line part or a straight line motion track of the measured sample, and the plane can be a plane formed by a plane part or a motion track of the measured sample.

The existing construction technology adopts drilled pile construction (influenced by geological conditions, most of stratums are anhydrous), the verticality of Z366 is 0.45 percent, the verticality of Z268 is 0.43 percent, the verticality can only be controlled within 0.5 percent of the design requirement, and the internal control value of 0.33 percent cannot be achieved.

SUMMERY OF THE UTILITY MODEL

In order to carry out effective monitoring in the straightness that hangs down to bored pile, the utility model provides a be used for bored pile straightness measuring device that hangs down solves the great problem of bored pile straightness error that hangs down in the work progress, improves bored pile straightness's precision measurement mode that hangs down by a wide margin.

In order to achieve the above object, the utility model discloses a technical scheme be a bored pile straightness measuring device that hangs down, including pile body 1, plumb bob 2, reflection of light strip 3, target paper 4, flashlight 5 and telescope 6.

The bottom of pile body 1 is fixed with target paper 4, draws on the target paper 4 and has the target ring, evenly is equipped with four points along the target ring of outermost round along circumference, is a point, b point, c point, d point respectively, and wherein pile body 1 position that a point corresponds is the foundation ditch inboard, and pile body 1 position that c point corresponds is the foundation ditch outside, and pile body 1 position that b point, d point correspond is the both sides of foundation ditch direction. The plumb bob 2 enters the target paper 4 along the top of the pile body 1 until reaching the bottom, and the light reflecting strip 3 is adhered on the plumb bob 2.

Further, the positions of the plumb bob 2 and the target ring are recorded by irradiating the reflecting strip 3 through a flashlight 5 of the pile body 1, and the specific deviation condition is observed through a telescope 6.

Furthermore, the target paper 4 is plastic packaging paper, so that wetting or damage is prevented; the target paper 4 is pre-adhered to the bottom inner wall of the pile body 1 through an adhesive tape.

Compared with the prior art, the utility model has simple structure, and compared with the common single plumb bob, the precision and the detection efficiency are obviously improved; better detection results can be obtained through the cooperation of the flashlight and the telescope.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the plumb bob measurement site.

Fig. 3 is a sectional view of the plumb line measurement.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of an exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

As shown in fig. 1-3, the utility model provides a be used for bored pile straightness measuring device that hangs down solves the great general problem of bored pile straightness error that hangs down in the work progress, has improved bored pile straightness's precision by a wide margin.

The hole wall verticality process measurement is carried out through a plumb bob with the bottom of 5cm, and the correction is timely carried out, and the measurement principle is as follows:

the drilled pile is a cylinder, the whole pile position is inclined and deviated during deviation, and the deviation position of the drilling machine can be judged by measuring four points. The four points are mainly positioned on the inner side and the outer side of the foundation pit and on the two sides of the foundation pit in the direction.

After the deviation of the drilling machine is judged, the direction of the drilling machine is adjusted by continuously judging the inclination direction of the plumb bob according to the analysis. Because the pipeline in the hole is insufficient, the upper part of the plumb bob 2 is fully adhered with the reflecting strip 3 on site, so that the flashlight 5 can conveniently reflect light when shining on the reflecting strip. Because the plumb bob is only 5cm, 1 telescope 6 is configured on site for convenient viewing, thereby facilitating the direct viewing of the condition of the plumb bob 2 and the target paper 4 at the bottom of the hole.

And (3) the field technician rechecks whether the verticality of the lower mast meets the requirement in the drilling process (5m, 10m, 15m, 20m and hole forming), if not, adjusting and making a deviation record (the central distance of 2.5cm on the field needs to be subtracted). Before drilling each pile, whether the verticality of the mast meets the requirement is checked again, and if not, adjustment is carried out. During the trompil, select the pick to bore and carry out the trompil, ensure that pile position deviation is in error range, adopt the rock core to bore after getting into the stratum, ensure that the drilling process satisfies the construction demand. And (3) strictly controlling the progress at the rock-soil junction, constructing in a low-pressure slow advancing mode, and returning to normal tunneling after the stratum completely enters the rock stratum. And the station position of the rotary drilling rig is adjusted, and the station of the rotary drilling rig is parallel to the station, so that the axis error is reduced.

Claims

1. The utility model provides a bored pile straightness measuring device that hangs down which characterized in that: target paper (4) is fixed at the bottom of the pile body (1), a target ring is drawn on the target paper (4), four points, namely a point a, a point b, a point c and a point d, are uniformly arranged along the outermost circle of the target ring along the circumferential direction, wherein the position of the pile body (1) corresponding to the point a is the inner side of the foundation pit, the position of the pile body (1) corresponding to the point c is the outer side of the foundation pit, and the positions of the pile bodies (1) corresponding to the point b and the point d are two sides of the foundation pit in the direction; the plumb bob (2) enters the target paper (4) until reaching the bottom along the top of the pile body (1), and the upper surface of the plumb bob (2) is stuck with a reflective strip (3).

2. The device for measuring the perpendicularity of the bored pile according to claim 1, wherein: the positions of the plumb bob (2) and the target ring are recorded by irradiating the reflecting strips (3) through a flashlight (5) of the pile body (1), and the specific deviation condition is observed through a telescope (6).

3. The device for measuring the perpendicularity of the bored pile according to claim 1, wherein: the target paper (4) is plastic packaging paper, and the target paper (4) is pre-pasted on the inner wall of the bottom of the pile body (1) through an adhesive tape.