CN201649139U

CN201649139U - Cast-in-place pile loading test inner force testing device

Info

Publication number: CN201649139U
Application number: CN2010201886549U
Authority: CN
Inventors: 张炜; 刘争宏; 张继文; 郑建国
Original assignee: CHINA JK INSTITUTE OF ENGINEERING INVESTIGATION AND DESIGN
Current assignee: CHINA JK INSTITUTE OF ENGINEERING INVESTIGATION AND DESIGN
Priority date: 2010-05-13
Filing date: 2010-05-13
Publication date: 2010-11-24
Anticipated expiration: 2020-05-13

Abstract

The utility model discloses a cast-in-place pile loading test inner force testing device, comprising two test pipes pre-embedded in the test pile longitudinally and symmetrically and extending out of the head of the test pile, the test pipe is formed by connecting a plurality of test pipe units, a test ring is arranged at the connection point of two adjacent test pipe units, a strain measuring probe sliding along the test pipe is arranged between two adjacent test rings. a strong all-purpose adhesive is coated at the joint of two adjacent test pipe units, a PVC electric flame-retardant adhesive tape and a high-voltage insulated self-adhesive tape are wound at the seam of two adjacent test pipe units. the change of the distance between two adjacent test rings on the test pipe embedded in the test pile is tested by the strain test probe to obtain the strain of the concrete between two test rings, then the pile side resistance and end resistance are calculated through the obtained strain according to the elastic theory. The cast-in-place pile loading test inner force testing device has simple structure, a large number of data acquisition and high reliability, is not easy to be destroyed, and is easy to be popularized.

Description

Drill-pouring pile loading test internal force testing arrangement

Technical field

The utility model relates to a kind of drill-pouring pile loading test internal force testing arrangement.

Background technology

At present, in new building thing, new construction of structures, bored pile is the base form of using always, can make Pile Foundations Design safety, economy, rationally according to the internal force test result.The internal force test of bored pile, normally adopt reinforcing bar meter method, promptly in pile body, bury reinforcing bar underground by soil depth, the concrete strain of stressed further calculating by the test result calculations reinforcing bar, obtain the size of collateral resistance and end resistance again, therefore, reinforcing bar meter method is a kind of indirect strain testing method.Have in the pile concrete filling process and to damage cable easily and test less than data, working environment and demarcation environment and inconsistently cause test error, bury negligible amounts underground and complete distribution, the calculating parameter that can not react collateral resistance such as is difficult for accurately determining at shortcoming.

The utility model content

The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, and a kind of drill-pouring pile loading test internal force testing arrangement is provided.By strain testing probe test be embedded on the survey pipe in the test pile pile body adjacent two survey ring spacings from variation can draw two and survey the strains that the interannular concrete take place, calculate pile side resistance and end resistance by the strain that records by elastic theory again, it is simple in structure, easy to use, certainty of measurement is high.

For achieving the above object, the technical solution adopted in the utility model is: drill-pouring pile loading test internal force testing arrangement, comprise that vertical symmetry is embedded in the test pile pile body and two of pile crown that stretch out test pile survey pipe, described survey pipe is surveyed pipe unit by several and is formed by connecting, be provided with a survey ring in described adjacent two junctions of surveying pipe unit, being provided with at adjacent two survey interannulars can be along the strain testing probe of surveying the pipe slip.

Aforesaid drill-pouring pile loading test internal force testing arrangement, the length of described survey pipe unit is 1m.

Above-mentioned drill-pouring pile loading test internal force testing arrangement evenly is coated with strength universal glue in described adjacent two joints of surveying pipe unit, twines electric non-flammable adhesive tape of PVC and High-Voltage Insulation self-adhesive tape at described adjacent two seam crossings of surveying pipe unit.

The utility model compared with prior art has the following advantages: vertically two of symmetric arrangement are surveyed pipe in the test pile pile body, by strain testing probe test be embedded on the survey pipe in the test pile pile body adjacent two survey ring spacings from variation can draw two and survey the strains that the interannular concrete take place, calculate pile side resistance and end resistance by the strain that records by elastic theory again.Simultaneously, in surveying pipe, have one and survey ring, therefore can utilize the strain testing probe directly to measure the variation relation of strain continuous in the pile body with the degree of depth every 1m.It is big to the utlity model has the data acquisition amount, and the characteristics that the strain testing precision is high are surveyed pipe and had higher intensity, when concrete perfusion, be difficult for destroyed, good reliability.And survey being symmetrical arranged of pipes for two, the strain testing result is averaged to eliminate load eccentric influence, it is simple in structure, easy to use, be convenient to promote the use of.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 surveys the structural representation of pipe for the utility model.

Fig. 3 is adjacent two structural representations of surveying the pipe unit junction of the utility model.

Fig. 4 is a connection diagram of surveying pipe and reinforcing cage when implementing the utility model.

The position of the concrete surface that pours in clear water that Fig. 5 injects in surveying pipe when being enforcement the utility model and the test pile concerns schematic diagram.

Description of reference numerals:

The 1-test pile; 2-surveys pipe; 3-surveys ring; 4-strain testing probe; The 5-pile crown;

The 6-foundation soil; 7-strength universal glue; Electric non-flammable adhesive tape of 8-PVC and High-Voltage Insulation self-adhesive tape;

The 9-reinforcing cage; The 10-clear water; The 11-concrete surface; 12-surveys pipe unit.

The specific embodiment

A kind of drill-pouring pile loading test internal force testing arrangement as shown in Figure 1, comprise that vertical symmetry is embedded in test pile 1 pile body and two of pile crown 5 that stretch out test pile 1 survey pipe 2, described test pile 1 is embedded in the foundation soil 6, and test pile 1 stretches out foundation soil 6, the end of test pile 1 is a pile crown 5, described survey pipe 2 is surveyed pipe unit 12 by several and is formed by connecting, and the length of described survey pipe unit 12 can be 1m.Be provided with a survey ring 3 in described adjacent two junctions of surveying pipe unit 12, as shown in Figure 2, survey 3 on ring at adjacent two and be provided with and manage the 2 strain testing probes 4 that slide along surveying.As shown in Figure 3, evenly be coated with strength universal glue 7, twine electric non-flammable adhesive tape of PVC and High-Voltage Insulation self-adhesive tape 8 at described adjacent two seam crossings of surveying pipe unit 12 in described adjacent two joints of surveying pipe unit 12.

The operating principle of the utility model drill-pouring pile loading test internal force testing arrangement is: when test, concrete generation strain in test pile 1 pile body, also can drive the survey ring of surveying in the pipe 23 micro-displacement takes place, the variation of measuring 3 distances of two survey rings can draw two and survey the strain that the interannular concrete takes place.During the internal force test, strain testing probe 4 is put into survey pipe 2, block two adjacent surveys and encircle the tension of 3 lower ends, can obtain the strain measurement value, slip strain testing probe 4 in surveying pipe 2 can record the change curve of strain continuous in the test pile 1 with the degree of depth continuously.Two strain values that same depth is recorded average the mean strain that promptly obtains this degree of depth place, calculate pile side resistance and end resistance by the strain that records by elastic theory again.

As shown in Figure 3, survey the precision that pipe 2 quality of burying quality underground directly have influence on test, need to guarantee to survey pipe 2 free from admixtures, not contaminated, cement paste enters and surveys pipe 2 when especially being strictly on guard against concrete spouting.Connect when surveying pipe unit 12, evenly smear strength universal glue 7, twine three circle electric non-flammable adhesive tapes of PVC and three circle High-Voltage Insulation self-adhesive tapes 8 at adjacent two seam crossings of surveying pipe unit 12 in adjacent two joints of surveying pipe unit 12; Behind the stake pore-forming, transfer in the process at reinforcing cage 9, as shown in Figure 4, will survey pipe 2 symmetrical colligations on reinforcing cage 9; Before concrete perfusion, as shown in Figure 5, in surveying pipe 2, fill with clear water 10, guarantee to survey pipe 2 interior head height greater than concrete surface 11 height.

The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; every according to the utility model technical spirit to any simple modification, change and equivalent structure transformation that above embodiment did, all still belong in the protection domain of technical solutions of the utility model.

Claims

1. drill-pouring pile loading test internal force testing arrangement, it is characterized in that: comprise that vertical symmetry is embedded in test pile (1) pile body and two of pile crown (5) that stretch out test pile (1) survey pipe (2), described survey pipe (2) is surveyed pipe unit (12) by several and is formed by connecting, be provided with a survey in the junctions of described adjacent two survey pipe units (12) and encircle (3), survey at adjacent two and be provided with the strain testing probe (4) that to manage (2) slip along survey between ring (3).

2. drill-pouring pile loading test internal force testing arrangement according to claim 1, it is characterized in that: the length of described survey pipe unit (12) is 1m.

3. drill-pouring pile loading test internal force testing arrangement according to claim 1 and 2, it is characterized in that: evenly be coated with strength universal glue (7) in described adjacent two joints of surveying pipe unit (12), twine electric non-flammable adhesive tape of PVC and High-Voltage Insulation self-adhesive tape (8) at described adjacent two seam crossings of surveying pipe unit (12).