CN1403685A

CN1403685A - Pile hole callipers

Info

Publication number: CN1403685A
Application number: CN02137353A
Authority: CN
Inventors: 王奎华; 胡昌斌; 谢康和
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2002-09-28
Filing date: 2002-09-28
Publication date: 2003-03-19

Abstract

The present invention is one kind of pile hole calipers. Each of several pieces of upper test strips is hinged to the lower end of the test tube at its one end and hinged to one end of one corresponding lower test strip, and the outer ends of the lower test strips and hinged to form an umbrella shaped structure. The test rope is passed through the test tube and connected to the movable hinging point of the lower test strips. Some positioning rod is mounted to the upper end of the test tube. After the test tube is descended to the measured depth, test rope is pulled to drive upwards the lower ends of the lower test strips so that the hinged point between the upper and the lower test strips moves horizontally and the test strips expand to contact the hole wall.

Description

Pile hole callipers

Technical field

The present invention relates to adopt mechanical means is the measuring equipment of feature, is a kind of inside diameter measurement device.

Background technology

In the process of pile foundation construction boring, before becoming empty back concrete spouting, may change owing to reasons such as soil deformation become the emptying aperture footpath, can the effective aperture reach designing requirement, directly affect the quality of foundation pile, the detection for the aperture does not at present also have reliable and practical method.

Summary of the invention

The purpose of this invention is to provide a kind of pile hole callipers, can conveniently detect the diameter of pile foundation construction boring.

The technical solution used in the present invention is as follows:

It comprises lining rope, and backstay is surveyed pipe, on survey bar, following survey bar; Several ends of surveying bar of going up are fixedly hinged on the external cylindrical surface of survey pipe lower end, the other end of several upward survey bars and an end of corresponding radical hypotrematic are movably hinged mutually, after being movably hinged mutually, several other ends of surveying bar down are beveled structure, lining rope passes the mutual moveable hinge contact of the other end of surveying survey bar under the Guan Houyu and links to each other, and backstay is equipped with in the upper end of surveying pipe.

The beneficial effect that the present invention has is: use this novel stake footpath measuring appliance, can detect the drilling diameter at different depth place simple and effectively, principle is simply clear and definite, economical and practical, on practicality, has obvious superiority, be very easy to promote the use of, can effectively monitor the drilling diameter of stake by using this measuring appliance, to guarantee pile quality, in today that present field of civil engineering extensively adopts pile foundation, can predict, this measuring apparatus will have broad application prospects, and will create the huge social economic benefit.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is an instrumentation plan of the present invention;

Fig. 4 is the fixed platform vertical view;

Fig. 5 surveys pipe upper end structural representation.

The specific embodiment

As shown in Figure 1 and Figure 2, several ends of surveying bar 4 of going up are fixedly hinged on survey pipe 1 lower end external cylindrical surface, the other end of several upward survey bars 4 and an end of corresponding radical hypotrematic 5 are movably hinged mutually, after being movably hinged mutually, several other ends of surveying bar 5 down are beveled structure, lining rope 1 links to each other with the mutual moveable hinge contact of the other end of surveying bar 5 down after passing and surveying pipe 3, and backstay 2 is equipped with in the upper end of surveying pipe 3.

Said survey pipe 3 is compo pipe or pvc pipe, is divided into several sections and forms with being threaded, and on one section the survey pipe 3 backstay 2 is housed topmost.Promptly manage 3 sides in one section survey topmost and have chute 9, shown in Fig. 5 a, Fig. 5 b, backstay 2 is housed in the chute 9, backstay 2 two ends are fixed tightly in backstay 2 in the chute 9 with nut.

Said upper and

lower survey bar

4,5 is steel bar or PVC bar, is respectively 6～8.Survey bar and guarantee that certain rigid and portability are arranged, as shown in Figure 2, upper and

lower survey bar

4,5 is 6, and promptly 6 covers are hinged.

As shown in Figure 3, during measurement, supporting leg 7 with fixed platform 6 is placed on the measured hole ground earlier, this measuring appliance is inserted in the hole from fixed platform 6 holes, rely on the backstay of surveying on the pipe 32 in fixed platform 6 location, to survey pipe during detection and arrive the degree of depth that needs detection 3 times, pulling lining rope 1 is surveyed bar 5 lower ends under the pulling of lining rope lower end, move upward, last survey bar 4 and the place's transverse movement that is articulated and connected of surveying bar 5 down are radiation profiles because survey bar, and inflated configuration is rounded substantially, when the hinged place is run into a hole wall fully, read the distance that lining rope 1 stretches this moment,, can obtain the distance of hinged place transverse movement by converting several times, multiply by 2, promptly obtain the drilling diameter of stake, the degree of depth of measuring position can be measured by the hole depth that advances of surveying pipe.

Claims

1. pile hole callipers, it is characterized in that: it comprises lining rope (1), backstay (2) is surveyed pipe (3), on survey bar (4), following survey bar (5); Several ends of surveying bar (4) of going up are fixedly hinged on the external cylindrical surface of survey pipe (3) lower end, several upward other ends of survey bar (4) and an end of corresponding radical hypotrematic (5) are movably hinged mutually, after being movably hinged mutually, several other ends of surveying bar (5) down are beveled structure, lining rope (1) links to each other with the mutual moveable hinge contact of the other end of surveying bar (5) down after passing and surveying pipe (3), and backstay (2) is equipped with in the upper end of surveying pipe (3).

2. pile hole callipers according to claim 1 is characterized in that: said survey pipe (3) is compo pipe or pvc pipe, is divided into several sections and forms with being threaded, and on one section the survey pipe (3) backstay (2) is housed topmost.

3. pile hole callipers according to claim 1 is characterized in that: said upper and lower survey bar (4), (5) are steel bar or PVC bar, are respectively 6～8.