CN202039804U

CN202039804U - An anchor device for a datum point in a drill hole

Info

Publication number: CN202039804U
Application number: CN201020683022XU
Authority: CN
Inventors: 姚爱军; 杜修力; 赵强
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2010-12-27
Filing date: 2010-12-27
Publication date: 2011-11-16
Anticipated expiration: 2020-12-27

Abstract

An anchor device for a datum point in a drill hole is used for displacement or deformation monitoring of rock-soil bodies such as foundation pits or side slopes and belongs to the field of geotechnical engineering testing technique. A guiding ball is connected with an inner pipe; a PVC casing pipe is sleeved outside the inner pipe; each supporting arm has one end fixed on the inner pipe and the other end fixed on the PVC casing pipe; the inner pipe is open with a sliding chute at one end near the guiding ball; a catch is disposed on the PVC casing pipe and is provided with a groove axially along the PVC casing pipe; the catch is fixed on the PVC casing pipe in a radial direction through two screws and can slide lengthwise; the catch is tied with a traction steel wire at one end far away from the guiding ball; the traction steel wire is put through the sliding chute, put into the inner pipe and pulled out of a drill hole opening for pulling; a pin is disposed under the catch and near the guiding ball; the pin is inserted into coincident holes of the PVC casing pipe and the inner pipe for fixing the PVC casing pipe on the inner pipe; and the bottom of the pin is cushioned with a spring. The anchor device for the datum point in the drill hole is easy to install, guarantees better stability of the datum point, is made of construction materials easy to obtain, and has low cost.

Description

Reference point anchor device in a kind of boring

Technical field

The utility model discloses reference point anchor device in a kind of boring, belong to the geotechnical engineering technical field of measurement and test, be used for the displacement or the deformation monitoring of geotechnical body such as foundation ditch or side slope.

Background technology

In the geotechnical engineering measuring technology, the displacement of engineerings such as foundation ditch, side slope or deformation monitoring are common object of construction production.At present, technology commonly used is the inclinometer test, is reference point with the earth formation deep point, calculates the distortion situation at each position of deviational survey pipe.Perhaps, adopting total powerstation to carry out ground deformation and measure, is reference point with certain point away from engineering rock mass, carries out long-term observation.Wherein, the reference point setting of inclinometer is comparatively complicated, needs sometimes to pour into a mould with pile body; Being provided with of ground deformation datum marks such as total powerstation is simple, but only can satisfy the surface displacement or the deformation monitoring of geotechnical body.

The utility model content

In order to solve the displacement or the deformation monitoring of geotechnical body such as foundation ditch or side slope, ensure the accuracy of displacement or deformation measurement data, the utility model proposes reference point anchor device in a kind of boring.

The utility model adopts following technical scheme:

Reference point anchor device in a kind of boring, comprise SDeflector 1, chute 2, PVC sleeve pipe 3; Support arm 4, interior pipe 5, catch 6, pin 7, traction steel wire 8, screw 9 is characterized in that: SDeflector 1 is connected with interior pipe 5, and outside the pipe 5, on the pipe 5, the other end was fixed on the PVC sleeve pipe 3 by the circle hoop in support arm 4 one ends were fixed in by the circle hoop in PVC sleeve pipe 3 was placed in.Interior pipe 5 has chute 2 near ends of SDeflectors, and PVC sleeve pipe 3 can slide at interior pipe chute 2 places.Catch 6 is positioned on the PVC sleeve pipe 3, catch 6 upper edge PVC sleeve pipes 3 axially grooved, and two screws 9 radially are fixed on it on PVC sleeve pipe, and are longitudinally-slidable, and catch 6 has traction steel wire 8 away from SDeflector 1 one ends system.Traction steel wire 8 passes by chute 2, pipe 5 in entering, and draw hell and be used for tractive.Pin 7 is positioned at 6 times close SDeflector 1 sides of catch, in the hole that insertion PVC sleeve pipe 3 and interior pipe 5 overlap PVC sleeve pipe 3 is fixed on the interior pipe 5, and the pin heelpiece has spring.

The using method of reference point anchor device is as follows in a kind of the boring: after excavation is portalled, at the bottom of this device sent into the hole, the tension traction steel wire, catch endwisely slips along the PVC sleeve pipe, pin ejects, along sliding away from the guiding pommel, traction drives support arm and struts the PVC sleeve pipe along interior pipe, can strengthen the stable of reference point.Traction steel wire in being located in the pipe is fixed on the catch of anchor device, under the protection of interior pipe, is connected with the geotechnical body surface probe, plays the effect of slotted line bar.

Compare with existing reference point anchor device, the utility model can be obtained following beneficial effect:

(1) device simple installation, the reference point steadiness is better;

(2) construction material obtains easily, and is with low cost.

Description of drawings

Fig. 1 forms schematic diagram for reference point anchor device in the boring;

Fig. 2 installs for reference point anchor device in the boring and uses schematic diagram;

Fig. 3 is reference point anchor device support arm collapsed state structure chart in the boring;

Fig. 4 is reference point anchor device support arm softened state structure chart in the boring;

Fig. 5 is reference point anchor device sectional drawing in the boring;

Among the figure: 1, SDeflector, 2, chute, 3, the PVC sleeve pipe, 4, support arm, 5, interior pipe, 6, catch, 7, pin, 8, traction steel wire, 9, screw, 10, boring, 11, cement mortar.

The specific embodiment

Be illustrated in figure 1 as in the boring reference point anchor device and form schematic diagram, comprise SDeflector 1, chute 2, PVC sleeve pipe 3; Support arm 4, interior pipe 5, catch 6, pin 7, traction steel wire 8, screw 9 is characterized in that: SDeflector 1 is connected with interior pipe 5, and outside the pipe 5, on the pipe 5, the other end was fixed on the PVC sleeve pipe 3 by the circle hoop in support arm 4 one ends were fixed in by the circle hoop in PVC sleeve pipe 3 was placed in.Interior pipe 5 has chute 2 near ends of SDeflectors, and PVC sleeve pipe 3 can slide at interior pipe chute 2 places.As shown in Figure 5, catch 6 is positioned on the PVC sleeve pipe 3, catch 6 upper edge PVC sleeve pipes 3 axially grooved, and two screws 9 radially are fixed on it on PVC sleeve pipe, and are longitudinally-slidable, and catch 6 has traction steel wire 8 away from SDeflector 1 one ends system.Traction steel wire 8 passes by chute 2, pipe 5 in entering, and draw hell and be used for tractive.Pin 7 is positioned at 6 times close SDeflector 1 sides of catch, in the hole that insertion PVC sleeve pipe 3 and interior pipe overlap PVC sleeve pipe 3 is fixed on the interior pipe 5, and the pin heelpiece has spring.

As shown in Figure 2, for reference point anchor device in the hole of certain building foundation pit hole wall displacement monitoring engineering application example is installed, among the figure, 10 are boring, and 11 is cement mortar.

Main implementation step is:

(1) adopt luoyang spade, nearly level (general about 10 °) is drawn and is dug boring, bore diameter 140mm, hole depth 15m.

(2) surface dust in the cleaning boring is standby.

(3) at ground assembling anchor device, will penetrate traction steel wire in the pipe in the PVC, segmentation and anchor device connect, and successively anchor device are sent in the hole.

(4) after anchor device is delivered at the bottom of the hole, the tension traction steel wire, pin ejects, and the PVC sleeve pipe is in free movement state, and strutted by traction drive support arm, and support arm is stuck on the hole wall.

(5) configuration cement grout, and at hole-bottom slurry-injection, the about 2m of slip casting segment length.

(6) maintenance is after 24 hours, and setting completed on schedule for the hole base.

Be illustrated in figure 3 as reference point anchor device support arm collapsed state structure chart in the boring of completing steps (3) back; Figure 4 shows that reference point anchor device support arm softened state structure chart in the boring of completing steps (4) back.

Claims

1. reference point anchor device in the boring, comprise SDeflector (1), chute (2), PVC sleeve pipe (3), support arm (4), interior pipe (5), catch (6), pin (7), traction steel wire (8), screw (9), it is characterized in that: SDeflector (1) is connected with interior pipe (5), PVC sleeve pipe (3) is placed in outside the interior pipe (5), support arm (4) one ends are fixed on the interior pipe (5) by the circle hoop, and the other end is fixed on the PVC sleeve pipe (3) by the circle hoop; Interior pipe (5) has chute (2) near an end of SDeflector, and PVC sleeve pipe (3) can be located to slide at interior pipe chute (2); Catch (6) is positioned on the PVC sleeve pipe (3), catch (6) upper edge PVC sleeve pipe (3) axially grooved, and two screws (9) radially are fixed on it on PVC sleeve pipe, and are longitudinally-slidable, and catch (6) has traction steel wire (8) away from SDeflector (1) one end system; Traction steel wire 8 passes by chute (2), enters interior pipe (5), and draws hell and be used for tractive; Pin (7) is positioned at close SDeflector (1) side under the catch (6), in the hole that insertion PVC sleeve pipe (3) and interior pipe (5) overlap PVC sleeve pipe (3) is fixed on the interior pipe (5), and pin (7) heelpiece has spring.