CN210086324U - High-precision scale device for measuring horizontal displacement change of foundation pit pile top by sight alignment method - Google Patents
High-precision scale device for measuring horizontal displacement change of foundation pit pile top by sight alignment method Download PDFInfo
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- CN210086324U CN210086324U CN201920440633.2U CN201920440633U CN210086324U CN 210086324 U CN210086324 U CN 210086324U CN 201920440633 U CN201920440633 U CN 201920440633U CN 210086324 U CN210086324 U CN 210086324U
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- horizontal displacement
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Abstract
The utility model discloses a look high accuracy scale device that alignment method measured foundation ditch pile bolck horizontal displacement and changed, include: basic measuring platform, calibrating device, the flexible centering rod in lower part, flexible landing leg, the flexible centering rod in upper portion and slide caliper, its characterized in that, four flexible landing legs are installed respectively to basic measuring platform's bottom angular point position, basic measuring platform's top is equipped with the flexible centering rod in upper portion, basic measuring platform's below is equipped with the flexible centering rod in lower part, the flexible centering rod in upper portion and the flexible centering rod in lower part all perpendicular to basic measuring platform, the basic measuring platform upper surface is equipped with calibrating device and slide caliper. The device has simple structure and simple operation, and can realize the measurement of submillimeter precision.
Description
Technical Field
The utility model belongs to the technical field of foundation ditch engineering monitoring, concretely relates to look high accuracy scale device that alignment method measured foundation ditch pile bolck horizontal displacement changes.
Background
The method has the advantages that the construction of a plurality of foundation pit projects is realized in the fields of buildings, municipal works and rail traffic engineering, various types of deformation such as horizontal displacement and settlement exist in the process of excavating the foundation pits, and the monitoring of the horizontal displacement of the pile top of the foundation pit support structure is an important work for monitoring the deformation, particularly the monitoring of deep foundation pit projects.
The method for monitoring the horizontal displacement of the pile top of the foundation pit support structure comprises the following steps: the forward intersection method, the backward intersection method, the guide line method, the GNSS method, the collimation method, and the like. The collimation line method is one of the most common methods in foundation pit engineering monitoring, and is characterized in that an observation instrument (such as a total station) is adopted to give a fixed straight line in a displacement direction perpendicular to a horizontal displacement monitoring point, a steel plate straight ruler with scales is placed in the direction perpendicular to the monitoring point and the fixed straight line, a measuring rod slides on the steel plate straight ruler, the distance from the monitoring point to the fixed straight line is recorded, and through monitoring in a unit period, the displacement change of the monitoring point is the horizontal distance change value from the monitoring point to the fixed straight line. The method is simple to operate, the reaction displacement variation is obvious, but the existing error is large, and the precision is low.
At present, the traditional method has the main problems that:
1. when observation is carried out at a longer distance, the center of the measuring drill rod is not easy to distinguish, and aiming errors are caused;
2. when the measuring rod is placed, a horizontal and vertical correcting device is not arranged, the measuring rod is placed only by human feeling, and the error is large;
3. the steel plate ruler is manually placed horizontally, a horizontal correction device is not needed, and the accuracy is not high enough;
4. when the steel plate ruler is placed perpendicular to the fixed straight line (collimation line), the steel plate ruler is also placed only by human feeling, is often not absolutely perpendicular to the collimation line, and the measured displacement is not necessarily perpendicular to the direction of the foundation pit;
5. the precision of steel sheet ruler is 1mm, and the precision is low, to the higher foundation ditch of monitoring level, is difficult to satisfy the monitoring requirement.
Disclosure of Invention
An object of the utility model is to overcome prior art not enough, provide a look high accuracy scale device that alignment method measured foundation ditch pile bolck horizontal displacement changes, the device simple structure and easy operation can realize the measurement of sub millimeter precision.
The utility model discloses a realize through following technical scheme:
the utility model provides a high accuracy scale device that sighting line method measured foundation ditch pile bolck horizontal displacement and changes, includes: the device comprises a basic measuring platform, a calibrating device, a lower telescopic centering rod, telescopic legs, an upper telescopic centering rod and a vernier caliper, and is characterized in that four telescopic legs are respectively installed at the bottom corner point position of the basic measuring platform, the upper telescopic centering rod is arranged above the basic measuring platform, the lower telescopic centering rod is arranged below the basic measuring platform, the upper telescopic centering rod and the lower telescopic centering rod are both vertical to the basic measuring platform, and the calibrating device and the vernier caliper are arranged on the upper surface of the basic measuring platform;
the vernier caliper comprises a vernier caliper pointer, a vernier caliper digital display screen and a vernier caliper scale surface, and is embedded in the center of the upper surface of the basic measuring platform along the length direction;
the top of the upper telescopic centering rod is provided with an alignment cross board and a prism, the bottom of the upper telescopic centering rod is fixedly connected with a vernier caliper pointer, and the upper telescopic centering rod can slide back and forth along with the vernier caliper pointer;
and the top end of the lower telescopic centering rod is fixed at the bottom end of the basic measuring platform and is positioned at the top end of the zero point of the vernier caliper.
In the above technical solution, the basic measurement platform is rectangular.
In the above technical solution, the calibration apparatus includes: a circular level bubble, a first level tube and a second level tube.
In the technical scheme, the circular leveling bubble is located at the corner position of the upper surface of the basic measuring platform, the first leveling pipe is located at the middle position of the short side of the upper surface of the basic measuring platform, and the second leveling pipe is located at the middle position of the long side of the upper surface of the basic measuring platform.
In the above technical solution, the first leveling tube and the second leveling tube are perpendicular to each other.
In the above technical solution, the precision of the vernier caliper is sub-millimeter precision.
In the technical scheme, the bottom of the telescopic supporting leg is conical.
In the above technical scheme, the telescopic supporting leg is provided with a height adjuster.
In the technical scheme, the lower telescopic centering rod is of a hollow structure and can be in butt joint with the horizontal displacement monitoring point.
In the technical scheme, the upper telescopic centering rod is provided with a second adjusting screw capable of adjusting the height, and the lower telescopic centering rod is provided with a first adjusting screw capable of adjusting the height.
The utility model has the advantages that:
the high-precision scale device for measuring the horizontal displacement change of the pile top of the foundation pit by the sight alignment method of the utility model ensures the absolute level of the whole basic measuring platform by the multi-point positioning of a plurality of level pipes and level bubbles; the prism rod at the bottom of the platform is directly in seamless butt joint with the monitoring point, so that manual alignment errors are avoided, and the measurement precision is greatly improved; through the linkage fit of the pointer of the observation platform and the vernier caliper, the reading is estimated and read to 0.01mm, and the reading is directly reached to the sub-millimeter precision level.
Meanwhile, the adjustment process of the observation platform can be completed at one time, so that the manual adjustment time is reduced, and the working efficiency is greatly improved.
Drawings
Fig. 1 is a schematic overall structure diagram of the present invention;
fig. 2 is a top view of the present invention;
FIG. 3 is a front view of the present invention;
fig. 4 is a left side view of the present invention;
fig. 5 is a schematic view of the present invention.
Wherein:
1: basic measurement platform, 2: calibration apparatus, 2-1: round level bubble, 2-2: first level tube, 2-3: second level tube, 3: lower telescopic centering rod, 4: first adjusting screw, 5: telescopic leg, 6: high-low regulator, 7: upper telescopic centering rod, 8: second adjusting screw, 9: collimation cross target, 10: prism, 11: vernier caliper, 11-1: vernier caliper pointer, 11-2: vernier caliper digital display screen, 11-3: and (5) digitally displaying a vernier scale surface.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical field person understand the solution of the present invention better, the technical solution of the present invention is further described below with reference to the specific embodiments.
Example 1
The utility model provides a high accuracy scale device that sighting line method measured foundation ditch pile bolck horizontal displacement and changes, includes: the device comprises a basic measuring platform 1, a calibrating device 2, a lower telescopic centering rod 3, telescopic supporting legs 5, an upper telescopic centering rod 7 and a vernier caliper 11, and is characterized in that four telescopic supporting legs 5 are respectively installed at the bottom corner point position of the basic measuring platform 1, the upper telescopic centering rod 7 is arranged above the basic measuring platform 1, the lower telescopic centering rod 3 is arranged below the basic measuring platform 1, the upper telescopic centering rod 7 and the lower telescopic centering rod 3 are both vertical to the basic measuring platform 1, and the calibrating device 2 and the vernier caliper 11 are arranged on the upper surface of the basic measuring platform 1;
the vernier caliper 11 comprises a vernier caliper pointer 11-1, a vernier caliper digital display screen 11-2 and a vernier caliper scale surface 11-3, and the vernier caliper 11 is embedded in the center of the upper surface of the basic measuring platform 1 along the length direction;
the top of the upper telescopic centering rod 7 is provided with an alignment cross target 9 and a prism 10, the bottom of the upper telescopic centering rod 7 is fixedly connected with a vernier caliper pointer 11-1, and the upper telescopic centering rod 7 can slide back and forth along with the vernier caliper pointer 11-1;
the top end of the lower telescopic centering rod 3 is fixed at the bottom end of the basic measuring platform 1 and is positioned at the top end of the zero point of the vernier caliper.
The use method of the device in the embodiment comprises the following steps:
when monitoring the horizontal displacement of the pile top of the foundation pit enclosure structure, see fig. 5, the rectangle in the figure represents the foundation pit, for example, monitoring points between AB on one side of the foundation pit are measured (the number of the monitoring points is a plurality of monitoring points which are arranged at equal intervals along AB, the monitoring points are usually small steel columns arranged on the foundation), C is an observation instrument (total station), D is an erected reference prism, and CD is a fixed straight line given in the displacement direction perpendicular to the horizontal displacement monitoring points. During monitoring, the device is placed above a monitoring point, the lower telescopic centering rod 3 is inserted into the monitoring point, then the four telescopic supporting legs 6 are respectively adjusted to calibrate the calibrating device 2 so as to ensure that the whole basic measuring platform 1 is in an absolute horizontal state, then the upper telescopic centering rod 7 is adjusted to enable the sighting cross target plate 9 and the prism 10 to face a measuring instrument (a total station), then the vernier caliper pointer 11-1 is slid along the slide way of the vernier caliper 11 until the prism 10 in the sighting part can be completely seen in an objective lens of the measuring instrument, the cross wire of the prism 10 and the cross wire in the objective lens of the measuring instrument are completely coincided, and at this time, the reading on the vernier caliper number display screen 11-2 is recorded. According to the monitoring period, the displacement change of each monitoring point can be monitored by monitoring regularly according to the method.
Example 2
On the basis of example 1, the basic measuring platform 1 is rectangular. The calibration device 2 includes: a round level bubble 2-1, a first level tube 2-2 and a second level tube 2-3. The circular leveling bubble 2-1 is located at the angular point position of the upper surface of the basic measuring platform 1, the first leveling pipe 2-2 is located at the middle position of the short side of the upper surface of the basic measuring platform 1, and the second leveling pipe 2-3 is located at the middle position of the long side of the upper surface of the basic measuring platform 1. The first level tube 2-2 and the second level tube 2-3 are perpendicular to each other.
When the calibrating device 2 is calibrated, the round level bubble 2-1, the bubbles in the first level tube 2-2 and the second level tube 2-3 are observed, and the telescopic supporting legs 6 are adjusted to enable the bubbles to be in the middle position.
Example 3
On the basis of example 2, the vernier caliper 11 precision is sub-millimeter precision. The precision is high, and the monitoring requirement can be met for the foundation pit with higher monitoring level.
Example 4
On embodiment 3's basis, 5 bottoms of telescopic leg are the toper, when the foundation ditch was measured, generally are earth ground, and the texture is soft, and 5 bottoms of telescopic leg design are the toper, the fixing device of being more convenient for. The telescopic legs 5 are fitted with height adjusters 6 to facilitate adjustment of the calibrating device 2. The upper telescopic centering rod 7 is provided with a second adjusting screw 8 with adjustable height, the second adjusting screw 8 is loosened to adjust the length and the angle of the upper telescopic centering rod 7, and then the second adjusting screw 8 is screwed to fix the upper telescopic centering rod 7.
The height and angle are adjusted by adjusting a second adjusting screw 8 mounted on the upper telescopic centering rod 7 so that the sighting cross target 9 and the prism 10 face the measuring instrument (total station).
The lower telescopic centering rod 3 is provided with a first adjusting screw 4 with adjustable height, the first adjusting screw 4 is loosened to adjust the length of the lower telescopic centering rod 3, and then the first adjusting screw 4 is screwed to fix the lower telescopic centering rod 3, so that the lower telescopic centering rod 3 can be butted with a horizontal displacement monitoring point.
The lower telescopic centering rod 3 is of a hollow structure or the bottom of the lower telescopic centering rod 3 is provided with an insertion hole, so that the insertion hole or the hollow structure can be inserted into a monitoring point and is butted with a horizontal displacement monitoring point (the foundation pit monitoring point is generally a steel nail or a steel column).
The invention has been described above by way of example, and it should be noted that any simple variants, modifications or other equivalent substitutions by a person skilled in the art without spending creative effort may fall within the scope of protection of the present invention without departing from the core of the present invention.
Claims (10)
1. The utility model provides a high accuracy scale device that sighting line method measured foundation ditch pile bolck horizontal displacement and changes, includes: the device comprises a basic measuring platform (1), a calibrating device (2), a lower telescopic centering rod (3), telescopic supporting legs (5), an upper telescopic centering rod (7) and a vernier caliper (11), and is characterized in that four telescopic supporting legs (5) are respectively installed at the bottom corner positions of the basic measuring platform (1), the upper telescopic centering rod (7) is arranged above the basic measuring platform (1), the lower telescopic centering rod (3) is arranged below the basic measuring platform (1), the upper telescopic centering rod (7) and the lower telescopic centering rod (3) are perpendicular to the basic measuring platform (1), and the calibrating device (2) and the vernier caliper (11) are arranged on the upper surface of the basic measuring platform (1);
the vernier caliper (11) comprises a vernier caliper pointer (11-1), a vernier caliper digital display screen (11-2) and a vernier caliper scale surface (11-3), and the vernier caliper (11) is embedded in the center of the upper surface of the basic measuring platform (1) along the length direction;
the top of the upper telescopic centering rod (7) is provided with an alignment cross target plate (9) and a prism (10), the bottom of the upper telescopic centering rod (7) is fixedly connected with a vernier caliper pointer (11-1), and the upper telescopic centering rod (7) can slide back and forth along with the vernier caliper pointer (11-1);
the top end of the lower telescopic centering rod (3) is fixed at the bottom end of the basic measuring platform (1) and is positioned at the zero point of the vernier caliper.
2. The high-precision scale device for measuring the horizontal displacement change of the foundation pit pile top by the line-of-sight method according to claim 1, wherein the basic measuring platform (1) is rectangular.
3. A high precision scale device for measuring the horizontal displacement change of the foundation pit pile top by the line of sight method according to claim 1, wherein the calibration device (2) comprises: a round level bubble (2-1), a first level tube (2-2) and a second level tube (2-3).
4. A high-precision staff gauge device for measuring the horizontal displacement change of the foundation pit pile top by the sighting line method according to claim 3, characterized in that said round level bubble (2-1) is located at the angular point position of the upper surface of the basic measuring platform (1), said first level pipe (2-2) is located at the middle position of the short side of the upper surface of the basic measuring platform (1), and said second level pipe (2-3) is located at the middle position of the long side of the upper surface of the basic measuring platform (1).
5. A high accuracy staff gauge device for measuring foundation pit pile top horizontal displacement variation according to the collimation line method of claim 3 or 4 characterized in that, said first leveling pipe (2-2) and second leveling pipe (2-3) are perpendicular to each other.
6. The high-precision scale device for measuring the horizontal displacement change of the foundation pit pile top by the line-of-sight method according to claim 1, wherein the precision of the vernier caliper (11) is sub-millimeter precision.
7. A high precision scale device for measuring the horizontal displacement change of the foundation pit pile top by the line of sight method according to claim 1, characterized in that the bottom of the telescopic supporting leg (5) is conical.
8. A high precision scale device for measuring the horizontal displacement change of the foundation pit pile top by the line of sight method according to claim 1, characterized in that the telescopic supporting leg (5) is provided with a height adjuster (6).
9. The high-precision scale device for measuring the horizontal displacement change of the foundation pit pile top by the line-of-sight method according to claim 1, wherein the lower telescopic centering rod (3) is of a hollow structure and can be butted with a horizontal displacement monitoring point.
10. A high-precision scale device for measuring the horizontal displacement change of the pile top of the foundation pit by the line-of-sight method according to claim 1, wherein the upper telescopic centering rod (7) is provided with a second adjusting screw (8) with adjustable height, and the lower telescopic centering rod (3) is provided with a first adjusting screw (4) with adjustable height.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920440633.2U CN210086324U (en) | 2019-04-02 | 2019-04-02 | High-precision scale device for measuring horizontal displacement change of foundation pit pile top by sight alignment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920440633.2U CN210086324U (en) | 2019-04-02 | 2019-04-02 | High-precision scale device for measuring horizontal displacement change of foundation pit pile top by sight alignment method |
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| CN210086324U true CN210086324U (en) | 2020-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066963A (en) * | 2020-08-24 | 2020-12-11 | 中国人民解放军61243部队 | Ground control point target for photogrammetry and rapid layout method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066963A (en) * | 2020-08-24 | 2020-12-11 | 中国人民解放军61243部队 | Ground control point target for photogrammetry and rapid layout method thereof |
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