CN212059192U - Pile tip stress testing device - Google Patents
Pile tip stress testing device Download PDFInfo
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- CN212059192U CN212059192U CN202020586394.4U CN202020586394U CN212059192U CN 212059192 U CN212059192 U CN 212059192U CN 202020586394 U CN202020586394 U CN 202020586394U CN 212059192 U CN212059192 U CN 212059192U
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- soil pressure
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- pile tip
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Abstract
The utility model relates to the field of pile foundation detection, in particular to a pile tip stress testing device, which comprises an annular mounting frame, a first soil pressure box, a plurality of second soil pressure boxes and a plurality of fixing pieces; a cross-shaped first connecting frame is arranged on the first soil pressure box, and a cross-shaped second connecting frame is arranged on the second soil pressure box; the first soil pressure box is arranged at the circle center of the mounting frame, the second soil pressure boxes are respectively arranged on the extension lines of the first connecting frame, and the first connecting frame is connected with the mounting frame through the second connecting frame; the mounting bracket is installed on the reinforcement cage through the mounting. The utility model discloses a setting of the link that sets up mounting bracket, "ten" style of calligraphy, first soil pressure cell center setting, the setting of arranging of second soil pressure cell on each extension line of first link for soil pressure cell is fixed on the mounting bracket and the box is by arranging on the measured object surface of standard and accurate, guarantees the accuracy of the test data of gathering.
Description
Technical Field
The utility model relates to a pile tip stress test in the pile foundation detection area, in particular to pile tip stress test device.
Background
The pile end stress test is an effective means for knowing the pile body failure mode and the bearing mechanism, and the method for reflecting the pile end stress change condition in real time by presetting the soil pressure cell at the pile end is widely applied to pile foundation tests. However, how to scientifically and normatively place the soil pressure cell at the bottom of the pile is a difficult problem, and the common method for binding the soil pressure cell at the bottom of the reinforcement cage has the technical problems that the soil pressure cell is not firmly installed, the distribution of a test surface is not normative and the like, so that the soil pressure cell is easy to drop and damage in the process of placing the reinforcement cage, and because test workers cannot guarantee the accurate position of the soil pressure cell, the obtained data directly influences the analysis and correlation research of the soil pressure at the pile end.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model provides a stake end stress test device, the device enable the soil pressure cell firm, the standard install on the steel reinforcement cage bottom, guarantee test data's accuracy.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pile tip stress testing device comprises an annular mounting frame, a first soil pressure box, a plurality of second soil pressure boxes and a plurality of fixing pieces; the first soil pressure cell is provided with a cross-shaped first connecting frame, and the second soil pressure cell is provided with a cross-shaped second connecting frame; the first soil pressure box is arranged at the circle center of the mounting frame, the second soil pressure boxes are respectively arranged on the extension lines of the first connecting frame, and the first connecting frame is connected with the mounting frame through the second connecting frame; the mounting bracket is installed on the reinforcement cage through the mounting.
Preferably, a connecting rod is further connected between the second connecting frames, the connecting rods are spliced to form a square shape, and the square vertex angle is fixedly connected with the mounting frame.
Preferably, the fixing piece is provided with a through hole, and the fixing piece is sleeved on the main rib of the reinforcement cage through the through hole.
Preferably, a slide way is arranged in the mounting rack, and two opposite surfaces of the mounting rack are respectively provided with a slide opening communicated with the slide way;
the fixing piece comprises a first part and a second part, the first part can slide along the slideway, the second part can slide along the sliding opening, the first part is clamped in the slideway, and the second part penetrates through the sliding opening to be connected with the first part;
the through hole penetrates through the first member and the second member.
Preferably, the fixing member further includes a third member located outside the mounting bracket and connected to the second member, and the through hole penetrates through the third member.
Preferably, the fixing piece further comprises a first nut, and one end of the main rib penetrates through the first component, the second component and the third component and then is connected with the first nut.
Preferably, the fixing piece further comprises a plugging piece, and the plugging piece is embedded in a gap between the through hole and the main rib.
Preferably, the first member and the third member are disc-shaped, the second member is cylindrical, and the third member has a diameter larger than the width of the slide port.
Preferably, a telescopic rod is further arranged between the first connecting frame and the second connecting frame.
Preferably, the mounting frame comprises a plurality of sub-pieces, and the sub-pieces are spliced into a ring shape through splicing pieces.
Preferably, the splicing piece comprises an arc-shaped connecting plate and a second nut, and a plurality of connecting holes are formed in the connecting plate at intervals along the radian direction of the connecting plate;
the two ends of the sub-piece are respectively provided with a plurality of threaded bulges corresponding to the connecting holes, and the connecting plate is sleeved on the bulges through the connecting holes and is fixed on the adjacent sub-piece through the second nuts.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model is provided with the mounting frame and the cross-shaped connecting frame on the soil pressure boxes, so that the soil pressure boxes are fixed on the mounting frame through the cross-shaped connecting frame; meanwhile, due to the arrangement of the cross-shaped connecting frame, the center of the first soil pressure cell and the arrangement of the second soil pressure cell on each extension line of the first connecting frame, the soil pressure cells are arranged on the surface of the measured object in a standard and accurate manner, and the accuracy of the collected test data is ensured. Among the prior art, on-spot ligature or welding soil pressure cell, it is still insecure to waste time and energy, and this setting of the link through mounting bracket and "ten" style of calligraphy not only makes the firm installation of soil pressure cell on the mounting bracket, still makes the quick installation on the steel reinforcement cage of stake end stress test device through the mounting bracket, and then improves the installation effectiveness.
Drawings
The present invention will now be further described with reference to the accompanying drawings and specific embodiments:
fig. 1 is a schematic view of the overall structure of the present invention installed on a reinforcement cage;
FIG. 2 is a schematic view of the connection structure of the mounting frame, the fixing member and the main reinforcement of the reinforcement cage of the present invention;
fig. 3 is a schematic view of the splicing structure of the mounting frame of the present invention.
In the figure:
1. mounting rack, 11, sub-parts, 111, bulges, 12, slide ways, 13 and slide openings,
2. a first soil pressure cell, 3, a second soil pressure cell,
4. a fixing member 41, a through hole 42, a first member 43, a second member 44, a third member 45, a first nut,
5. the connecting rod comprises a connecting rod body 6, a telescopic rod body 7, a splicing piece 71, a connecting plate 711, a connecting hole 72, a second nut 8, a first connecting frame 9, a second connecting frame 10 and a main rib.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1 to 3, the present embodiment discloses a pile tip stress testing apparatus, which includes an annular mounting frame 1, a first soil pressure cell 2, a plurality of second soil pressure cells 3, and a plurality of fixing members 4; a cross-shaped first connecting frame 8 is arranged on the first soil pressure box 2, and a cross-shaped second connecting frame 9 is arranged on the second soil pressure box 3; the first soil pressure boxes 2 are arranged at the circle center of the mounting frame 1, the second soil pressure boxes 3 are respectively arranged on each extension line of the first connecting frame 8, and the first connecting frame 8 is connected with the mounting frame 1 through the second connecting frame 9; the mounting rack 1 is installed on the reinforcement cage through the fixing piece 4.
In the embodiment, the mounting frame 1 and the cross-shaped connecting frame are arranged on the soil pressure boxes, so that the soil pressure boxes are fixed on the mounting frame 1 through the cross-shaped connecting frame; meanwhile, due to the arrangement of the cross-shaped connecting frame, the arrangement of the center of the first soil pressure cell 2 and the arrangement of the second soil pressure cell 3 on each extension line of the first connecting frame 8, the soil pressure cells are arranged on the surface of a measured object in a standard and accurate manner, and the accuracy of the collected test data is guaranteed. Among the prior art, on-spot ligature or welding soil pressure cell, it is still insecure to waste time and energy, and this setting of the link through mounting bracket 1 and "ten" style of calligraphy not only makes the firm installation of soil pressure cell on mounting bracket 1, still makes on the steel reinforcement cage of the quick installation of pile tip stress test device through mounting bracket 1, and then improves the installation effectiveness, improves the practicality of this embodiment.
In this implementation, still be connected with connecting rod 5 between the second link 9, it is square still to splice between the connecting rod 5, and this square apex angle and mounting bracket 1 fixed connection.
According to the characteristic that current soil pressure cell is short cylindricality, the link welded fastening of this implementation "ten" style of calligraphy is on a disc of soil pressure cell, be connected between first link 8 and the second link 9 of "ten" style of calligraphy of this embodiment, and second link 9 and connecting rod 5 be connected, make the branch frame of each "ten" style of calligraphy all directly or indirectly fix on mounting bracket 1, and then outside the steadiness of the mounting bracket 1 of assurance soil pressure cell installation, still guarantee that soil pressure cell is the horizontality, the accuracy of the test data that the assurance collection of horizontality's soil pressure cell can be further.
The prior art has requirements for the soil pressure cell technology: in engineering, a pile end is generally provided with an earth pressure cell to measure the stress of the pile end, the earth pressure cell is specifically arranged in two orthogonal diameter directions of a pile, four earth pressure cells are symmetrically arranged, the earth pressure cells are arranged in the middle, and five test elements are arranged in total; the soil pressure box is embedded into a soil body at an appointed point position after the pile foundation is formed into a hole, and the horizontal placement of the soil pressure box and a contact surface is ensured. The pile tip stress testing device of the embodiment completely meets the technical requirements on the soil pressure cell.
In this embodiment, the soil pressure cell comprises five soil pressure cells (i.e. a first soil pressure cell 2 and four second soil pressure cells 3), and the connecting line of the second soil pressure cell 3 and the first soil pressure cell 2 is crossed.
As shown in fig. 2, in this embodiment, a through hole 41 is formed in the fixing member 4, and the fixing member 4 is sleeved on the main reinforcement 10 of the reinforcement cage through the through hole 41.
Further, a slide way 12 is arranged in the mounting rack 1, two opposite surfaces of the mounting rack 1 are respectively provided with a slide opening 13, and the slide openings 13 are communicated with the slide way 12;
the fixed part 4 comprises a first part 42 capable of sliding along the slideway 12 and a second part 43 capable of sliding along the sliding opening 13, the first part 42 is clamped in the slideway, and the second part 43 passes through the sliding opening 13 and is connected with the first part 42;
the through hole 41 penetrates the first member 42 and the second member 43.
In this embodiment, the fixing member 4 further includes a third part 44, the third part 44 is located outside the mounting bracket 1 and connected to the second part 43, and the through hole 41 penetrates through the third part 44.
In this embodiment, the fixing member 4 further includes a first nut 45, and one end of the main rib 10 passes through the through hole 41 and is connected to the first nut 45 after passing through the first member 42, the second member 43, and the third member 44; and a thread is reserved at one end of the main rib 10.
The fixing part 4 further comprises a plugging part which is embedded in a gap between the through hole 41 and the main rib 10.
In this embodiment, the number of the fixing member 4 corresponds to the number of the main ribs 10 of the reinforcement cage, and in the process of installing the pile-end stress testing device on the reinforcement cage, the main ribs 10 on the reinforcement cage respectively pass through the through holes 41 on the fixing member 4 and the other sliding port 13 irrelevant to the fixing member 4, the pile-end stress testing device is sleeved on the reinforcement cage, the main ribs 10 are threaded, the first nut 45 can clamp the pile-end stress testing device on the area provided with the threads on the main rib 10, in other words, the pile-end stress testing device is clamped on a specific section of the reinforcement cage and is firmly fixed on the reinforcement cage by the first nut 45 and the plugging member. The device mode makes pile tip stress test device parallel with the cross section of steel reinforcement cage, combines the link of "ten" style of calligraphy and the setting of connecting rod 5, guarantees that the soil pressure cell is the horizontality, guarantees the accuracy of the experimental data of gathering.
The cooperation of the first nut 45 and the plug member also enables the entire testing apparatus to be held level at the bottom of the reinforcement cage.
In this embodiment, a telescopic rod 6 is further disposed between the first connecting frame 8 and the second connecting frame 9, and a distance between the first connecting frame 8 and the second connecting frame 9 is adjusted by the telescopic rod 6; the connecting rod 5 is also provided with a telescopic rod 6 for adapting to the distance change between the first connecting frame 8 and the second connecting frame 9.
As shown in fig. 1 and 3, in the present embodiment, the mounting frame 1 includes a plurality of sub-pieces 11, and the sub-pieces 11 are spliced into a ring shape by a splicing piece 7.
The splicing piece 7 comprises an arc-shaped connecting plate 71 and a second nut 72, wherein a plurality of connecting holes 711 are arranged on the connecting plate 71 at intervals along the radian direction of the connecting plate 71;
the two ends of the sub-part 11 are respectively provided with a plurality of threaded protrusions 111 corresponding to the connecting holes 711, and the connecting plate 71 is sleeved on the protrusions 111 through the connecting holes 711 and fixed on the adjacent sub-part 11 through the second nuts 72.
In this embodiment, the mounting bracket 1 is divided into four parts (i.e. four parts 11), and the threaded protrusion 111 is disposed on the outer side surface of the mounting bracket 1.
In fact, there is the steel reinforcement cage of different specifications or the experimental stake in different stake footpaths, and this embodiment is through setting up flexible member 6, through setting up the form that can splice with mounting bracket 1 for flexible, connecting plate 71 through the flexible member 6 of control entangles protruding 111's number, with the size that changes mounting bracket 1, and then adapts to the steel reinforcement cage of different specifications or the experimental stake in different stake footpaths, improves the utility model discloses a practicality. In other words, the extension of the telescopic rod 6 can generate an expansion joint at the joint of each component 11, so that the connection buckle can play a role of stabilizing the whole structure by connecting the adjacent thread protrusions 111 and fixing with the nut.
Meanwhile, the arrangement that the telescopic rod piece 6 and the mounting rack 1 can be spliced can also adjust the arrangement position of the soil pressure cell to carry out accurate positioning. Further, slide 12 and sliding opening 13's setting for mounting 4 can be according to the appropriate increase and decrease of main muscle 10 radical, if when main muscle 10 radical increase, in first part 42 in mounting 4 passes through the port embedding slide 12 of piecing 11, second part 43 slides in sliding opening 13 and can drive first part 42 and remove the suitable position of mounting bracket 1.
In this embodiment, the soil pressure cell is a vibrating wire soil pressure cell. The principle of the vibrating wire type soil pressure cell is that when soil stress in a structure to be measured changes, the sensing plane of the vibrating wire type soil pressure cell can synchronously sense the change of the stress, the sensing plane deforms along with the change, and the deformation is converted into the change of the vibrating wire stress at any time through the vibrating wire, so that the vibration frequency of the vibrating wire is changed. The built-in solenoid of vibrating wire formula soil pressure cell has changed the change of the signal of telecommunication with the frequency variation of vibrating wire, through cable transmission to data collection device, makes things convenient for the researcher to read in real time and look over, and data collection device and high in the clouds service connection have made things convenient for engineering technical staff's data acquisition and analysis, and a whole set of test equipment is collected installation, fixed, correction, transmission, collection and upload as an organic whole, has a plurality of technical advantages such as easy to assemble, accurate positioning, sturdy and durable, wireless transmission.
The utility model discloses there is following advantage:
1. the operation is convenient, on-site welding is not needed, only the thread prefabrication treatment is needed to be carried out on the end part of the main reinforcement 10 of the steel reinforcement cage, the main reinforcement 10 penetrates through the through hole 41 on the fixing piece 4 and is fixed with the gasket through the first nut 45, the whole assembly type installation process only needs 10 minutes, the principle of a test element (namely, a vibrating string type soil pressure cell) is simple, and the sensitivity degree is high;
2. the detection efficiency is effectively improved, the damage rate of a test element (namely, the vibrating wire type soil pressure cell) is reduced, and due to firm installation, the soil pressure cell is effectively prevented from falling, colliding and damaging due to infirm fixation in the process of hoisting the reinforcement cage; meanwhile, as the connecting lines of the second soil pressure cell 3 and the first soil pressure cell 2 are crossed, namely the connecting rods 5 are arranged, the scientificity of the installation position of the vibrating wire type soil pressure cell is ensured, and the data error caused by the displacement of a test element in the conventional test process is avoided;
3. the device can change the position and the number of the fixing pieces 4 according to the reinforcement cages of different specifications or the test piles of different pile diameters, can adjust the radius of the test device through the telescopic rod piece 6, is suitable for stress tests of reinforcement cages of various specifications and pile bodies of various specifications, and has wide applicability and innovation;
4. the outer side surface of the sub-part 11 is provided with a protrusion 111 with a preformed thread in a protruding mode, the sub-parts 11 which move adjacently are connected with the protrusion 111 in a buckling mode through the connecting plate 71 and are fixed through the second nuts 72, and therefore stability of the testing device is improved.
The utility model discloses a whole set of pile tip stress test system has a great deal of advantages such as simple installation, suitability are strong, test data are accurate and upload in real time, the utility model discloses a whole set of test system test element technical maturity, the principle is clear, and is easy and simple to handle, and the result is reliable, and improvement pile tip stress detection's that can be by a wide margin efficiency of software testing and measuring accuracy have apparent engineering meaning.
The present invention is not limited to the above embodiment, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology if they do not depart from the spirit and scope of the present invention.
Claims (10)
1. A pile tip stress testing device is characterized by comprising an annular mounting frame, a first soil pressure box, a plurality of second soil pressure boxes and a plurality of fixing pieces;
the first soil pressure cell is provided with a cross-shaped first connecting frame, and the second soil pressure cell is provided with a cross-shaped second connecting frame; the first soil pressure box is arranged at the circle center of the mounting frame, the second soil pressure boxes are respectively arranged on the extension lines of the first connecting frame, and the first connecting frame is connected with the mounting frame through the second connecting frame;
the mounting bracket is installed on the reinforcement cage through the mounting.
2. The pile tip stress testing device of claim 1, wherein connecting rods are further connected between the second connecting frames, the connecting rods are spliced in a square shape, and the top corners of the square shape are fixedly connected with the mounting frames.
3. The pile-end stress testing device of claim 1, wherein the fixing member is provided with a through hole, and the fixing member is sleeved on the main reinforcement of the reinforcement cage through the through hole.
4. The pile tip stress testing device according to claim 3, wherein a slide way is arranged in the mounting frame, and two opposite surfaces of the mounting frame are respectively provided with a slide port communicated with the slide way;
the fixing piece comprises a first part and a second part, the first part can slide along the slideway, the second part can slide along the sliding opening, the first part is clamped in the slideway, and the second part penetrates through the sliding opening to be connected with the first part;
the through hole penetrates through the first member and the second member.
5. The pile tip stress testing apparatus of claim 4, wherein the fixture further comprises a third member located outside the mounting frame and connected to the second member, the through-hole extending through the third member.
6. The pile tip stress testing device of claim 5, wherein the fixing member further comprises a first nut, and one end of the main rib penetrates through the first member, the second member and the third member and then is connected with the first nut.
7. The pile tip stress testing apparatus of claim 6, wherein said securing member further comprises a plug member embedded in a gap between said through hole and said main bar.
8. The pile tip stress testing device of claim 1, further comprising a telescoping rod between the first connecting frame and the second connecting frame.
9. The pile tip stress testing apparatus of claim 8, wherein the mounting frame comprises a plurality of sub-pieces, the sub-pieces being joined together in a ring shape by a splice.
10. The pile tip stress testing device of claim 9, wherein the splice comprises an arc-shaped connecting plate and a second nut, and a plurality of connecting holes are arranged on the connecting plate at intervals along the radian direction of the connecting plate;
the two ends of the sub-piece are respectively provided with a plurality of threaded bulges corresponding to the connecting holes, and the connecting plate is sleeved on the bulges through the connecting holes and is fixed on the adjacent sub-piece through the second nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020586394.4U CN212059192U (en) | 2020-04-17 | 2020-04-17 | Pile tip stress testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020586394.4U CN212059192U (en) | 2020-04-17 | 2020-04-17 | Pile tip stress testing device |
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| CN212059192U true CN212059192U (en) | 2020-12-01 |
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| CN202020586394.4U Active CN212059192U (en) | 2020-04-17 | 2020-04-17 | Pile tip stress testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323151A (en) * | 2020-04-17 | 2020-06-23 | 广州建设工程质量安全检测中心有限公司 | Pile tip stress testing device |
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- 2020-04-17 CN CN202020586394.4U patent/CN212059192U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323151A (en) * | 2020-04-17 | 2020-06-23 | 广州建设工程质量安全检测中心有限公司 | Pile tip stress testing device |
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