CN205785203U - A kind of levelling rod for pit retaining monitoring - Google Patents

Abstract

The utility model discloses a level gauge for foundation pit monitoring, which is used in the technical field of engineering detection and monitoring, and comprises a base column and a scale body. , The second side and the third side are regular triangular prisms, the first side and the second side are respectively provided with an indium steel ruler, the bottom of the ruler body is provided with a second connecting plate, and the axis of the second connecting plate and the ruler body are perpendicular to each other , a level is provided on the second connecting plate or the scale body, the first connecting plate and the second connecting plate are connected through an adjustment structure, and the adjustment structure can adjust the scale body to a vertical state. For foundation pit monitoring or periodic observation projects, this fixed adjustable height leveling rod can be used; labor cost is saved; personnel safety is improved; monitoring accuracy is improved; and efficiency is high. The level gauge can also be disassembled and reused after being installed and used.

Description

A level gauge for foundation pit monitoring

technical field

The utility model is used in the technical field of engineering detection and monitoring, in particular to a leveling rod used for foundation pit monitoring.

Background technique

Leveling, also known as "geometric leveling", is a method of measuring the height difference between two points on the ground with a level and a leveling rod. Place a level between two points on the ground, observe the leveling rod erected on the two points, and calculate the height difference between the two points according to the reading on the ruler. Usually starting from the leveling origin or any known elevation point, the elevation of each point is measured station by station along the selected leveling route. The instrument used for leveling is a level, and the tools are a leveling rod and a pad. This traditional measurement method has the following problems in the application of foundation pit monitoring: 1. It needs 3 surveyors (1 person to observe, 2 people to measure the ruler) to complete a complete leveling measurement, and the labor cost is high; 2. It takes time for ruler personnel to adjust the center of the bubble, which affects work efficiency and monitoring accuracy; 3. The ruler personnel need to stand on the edge of the foundation pit, which poses a great safety hazard.

In the patent with the publication number CN203687925U, a multi-scale leveling gauge is disclosed, which includes a hollow cuboid ruler body, a pair of parallel sides of the ruler body are provided with square grooves, and the top surface of the ruler body is close to the square groove. There are ruler grooves parallel to the square groove and running through the top surface of the ruler body on both sides, and a spare ruler groove parallel to the ruler groove is arranged in the middle of the two ruler grooves; The top surface corresponds to the matching ruler groove and the spare ruler groove, and the ruler surface is installed in the ruler groove and the spare ruler groove, and a top cover is also installed on the ruler body top surface. However, it is limited to increasing the versatility of the leveling rod, making it easy to carry, saving the purchase cost of the leveling rod, reducing the cost of making the leveling rod in society, and cannot solve the problems encountered in foundation pit monitoring.

The patent whose publication number is CN202229760U discloses a method of changing the section of the conventional leveling staff into a triangle (or an arc surface approximately triangular), and using the angle difference generated by the triangular section, the instrument can observe the inclination of the leveling staff in the direction of the instrument A technical solution to comprehensively control the deviation of the vertical ruler. The improved triangular level (tower ruler and wooden ruler) has a more stable structure—reduced deformation error, wider and clearer scale surface marking—reduces the probability of misreading, but still has the aforementioned disadvantages, namely: 1. High labor cost ; 2, can not fundamentally solve the safety problem of the ruler staff; 3, work efficiency fails to improve.

Utility model content

In order to solve the above problems, the utility model provides a level gauge for foundation pit monitoring, which can use this fixed adjustable height level gauge for foundation pit monitoring or periodic observation projects; save labor costs; improve personnel Safety; improve monitoring accuracy; high efficiency. The level gauge can also be disassembled and reused after being installed and used.

The technical solution adopted by the utility model to solve the technical problem is: a leveling rod for foundation pit monitoring, including a base column and a scale body, the top of the base column is provided with a first connecting plate, and the scale body has a first The side, the second side and the third side are in the shape of a regular triangular prism. The first side and the second side are each provided with an indium steel ruler. The bottom of the ruler is provided with a second connecting plate, and the second connecting plate and the axis of the ruler are mutually Vertically, a level is provided on the second connecting plate or the scale body, the first connecting plate and the second connecting plate are connected through an adjustment structure, and the adjustment structure can adjust the scale body to a vertical state.

As a further improvement of the technical solution of the utility model, the height of the base column is adjustable.

As a further improvement of the technical solution of the utility model, the base column includes a first outer tube and a first inner tube sleeved in the first outer tube, the first inner tube can move up and down relative to the first outer tube, and the first outer tube The bottom of the tube is provided with a base plate, along which the first outer tube and the first inner tube are provided with a number of equidistant fixing holes, the first outer tube and the first inner tube can pass through the fixing bolts of the fixing holes lock tight.

As a further improvement of the technical solution of the utility model, the base column includes a second outer tube and a second inner tube sleeved in the second outer tube, the bottom of the second outer tube is provided with a base plate, and the second outer tube The inner wall is provided with an internal thread, and the outer wall of the second inner tube is provided with an external thread that engages with the internal thread. The second inner tube can rotate relative to the second outer tube to move up and down, and the top of the second outer tube is provided with a buckle pin to fix the second tube. Two inner tubes.

As a further improvement of the technical solution of the utility model, the level includes a two-dimensional bubble level arranged on the second connecting plate.

As a further improvement of the technical solution of the present invention, the level includes a circular bubble level arranged on the third side of the scale body or on the second connecting plate.

As a further improvement of the technical solution of the utility model, a number of circular holes are symmetrically distributed on the first connecting plate and the second connecting plate, and the adjustment structure includes springs arranged between the first connecting plate and the second connecting plate and passing through Bolts tightened by nuts after passing through the round holes of the first connecting plate, the springs, and the round holes of the second connecting plate, and the first connecting plate is provided with sinking grooves matching the bolt heads of the bolts at the bottom of each round hole.

As a further improvement of the technical solution of the utility model, the adjustment structure includes a foot screw arranged between the first connecting plate and the second connecting plate and connecting the first connecting plate and the second connecting plate.

As a further improvement of the technical solution of the present invention, the bottom of the first connecting plate is provided with a prism that can be used for horizontal displacement monitoring.

As a further improvement of the technical solution of the utility model, the base column is provided with a reflective sheet that can be used for horizontal displacement monitoring.

The beneficial effects of the utility model:

1. Save labor cost. After the indium steel ruler is installed on the retaining wall of the foundation pit or on the top of the slope, only one surveyor needs to use the level to place it at a suitable position between the two observation points to complete the front view and rear view. There is no need to arrange another two people to measure the ruler, which greatly saves labor costs.

2. Improve work efficiency. Since the vertical ruler is installed once, it will not move until the monitoring is completed, and the position of the ruler body is obvious. Each observation reduces the work of finding points, vertical rulers, and leveling, including not having to cross some construction guardrails, which greatly improves work efficiency. It is also conducive to the timeliness of observation data.

3. Improve security. Since the indium steel ruler is fixedly installed on the enclosure wall or the top of the slope before excavation of the foundation pit, after excavation, there is no need to manually go to the edge of the foundation pit to erect the ruler and support the ruler, thus greatly improving the safety.

4. Improve monitoring accuracy. Since the scale body does not move after installation, the deviation caused by each artificial ruler process is reduced, and the measurement accuracy is correspondingly improved.

5. High environmental applicability. Since the height of the scale body can be adjusted up and down through the lifting of the base column, it can also be used when the site conditions are complicated and the height requirements of the scale body at each observation point are different.

6. It is convenient for horizontal displacement observation. The horizontal displacement monitoring point is set on the base column, and the visibility condition is good, which is conducive to the observation of horizontal displacement.

7. Reuse. After the monitoring of a project is completed, the scale body and base column can be removed for other projects.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is a side view of the structure of the utility model;

Fig. 2 is a front view of the structure of the utility model;

Fig. 3 is a top view of the structure of the utility model.

detailed description

Referring to Fig. 1 to Fig. 3, it has shown the concrete structure of the preferred embodiment of the present utility model. The structural features of each element of the present utility model will be described in detail below, and if there is a description of the direction (up, down, left, right, front and back), the structure shown in Figure 1 is used as a reference description, but the utility model The actual use direction is not limited to this.

The utility model provides a level gauge for foundation pit monitoring, comprising a base column 1 and a scale body 2, the top of the base column 1 is provided with a first connecting plate 11, and the scale body 2 has a first side 21, a second The regular triangular prism shape of two sides 22 and the 3rd side 23, scale body 2 adopts aluminum alloy material to make, the corner place of first side 21, second side 22 is provided with chamfering, first side 21 and second side 22 are respectively provided with There is an indium steel ruler with a height of 500mm and a width of 25mm. The bottom of the ruler body 2 is connected with a circular steel plate of Ф150×8 as the second connecting plate 25. The axis of the second connecting plate 25 and the ruler body 2 are perpendicular to each other. The second A level 3 is provided on the connecting plate 25 or the scale body 2, and the first connecting plate 11 and the second connecting plate 25 are connected through an adjustment structure, which can adjust the scale body 2 to a vertical state. When the ruler body 2 is in a vertical state, the indium steel rulers on both edges can be used for leveling.

Wherein, the height of the base column 1 is adjustable, and the base column 1 can be designed in the following two schemes.

Solution 1: The base column 1 includes a first outer tube 12 and a first inner tube 13 sleeved in the first outer tube 12, and both the first outer tube 12 and the first inner tube 13 are round stainless steel tubes. The size of the first outer tube 12 is Ф83×5×1300, the size of the first inner tube 13 is Ф70×5×1300, the unit is mm; the first inner tube 13 can move up and down relative to the first outer tube 12, the first outer tube 12 A square steel plate is welded at the bottom to form the base plate 14, which is fixed at the elevation observation point on the top of the enclosure wall (slope) by expansion bolts; both sides of the first outer tube 12 and the first inner tube 13 start at 100 mm above the bottom, and each Arrange the corresponding fixing holes 15 to a height of 1000mm at an equidistant distance of 100mm. The hole diameter is Ф10. After the bolts of the corresponding diameter are used to penetrate the holes on both sides, the first outer tube 12 and the first inner tube 13 are relatively fixed, and they can be pulled out and fixed when they need to be raised and lowered. Bolt; a circular steel plate (the first connecting plate 11 ) of Ф150×8 is welded on the top of the first inner tube 13 for installing the scale body 2 and adjusting structure thereon. Through the relative movement up and down of the first inner tube 13 and the second outer tube 12, the height of the base column 1 can be adjusted, and the maximum adjustable height is 1000 mm.

Scheme 2: The base column 1 includes a second outer tube and a second inner tube set inside the second outer tube, both the second outer tube and the second inner tube are made of round stainless steel tubes, and the size of the second outer tube is Ф83×5× 1300, the size of the second inner pipe is Ф70×5×1300, unit mm; a square steel plate at the bottom of the second outer pipe forms the base plate, which is fixed at the elevation observation point on the top of the enclosure wall (slope) through expansion bolts; The inner wall of the second outer tube is provided with an internal thread, the outer wall of the second inner tube is provided with an external thread engaged with the internal thread, the second inner tube can rotate relative to the second outer tube to move up and down, and the top of the second outer tube is provided with a buckle The bolt is used to fix the second inner tube, and it can be rotated once to lift up and down by one pitch, and the maximum adjustable height is 1000mm.

The spirit level is designed in two schemes:

Solution 1: the level 3 includes a two-dimensional bubble level arranged on the second connecting plate 25;

Solution 2: The level 3 includes a circular bubble level arranged on the third side 23 of the scale body 2 or on the second connecting plate 25 .

The adjustment structure can be designed in the following two ways:

Solution 1: The first connecting plate 11 and the second connecting plate 25 are symmetrically distributed with three round holes of Ф10, facing up and down, the adjustment structure includes a spring arranged between the first connecting plate 11 and the second connecting plate 25 and After passing through the round hole of the first connecting plate 11, the spring, and the round hole of the second connecting plate 25 in turn, the bolts fastened by nuts, the bolt head and the nut are hexagonal, the length of the bolt is about 30mm, and the outer diameter of the screw rod is 10mm; high strength The inner diameter of the spring is 10mm and the height is about 5mm. The first connecting plate 11 is provided with a hexagonal sinker matching the bolt head of the bolt at the bottom of each round hole, and the three round holes of the second connecting plate 25 are respectively located on the central axis of the three edges of the triangular body . The bolt passes through the circular hole of the first connecting plate 11, a high-strength spring, and the circular hole of the second connecting plate 25 upwards successively, and is fixed by the hexagonal nut then.

Option 2: The adjustment structure includes a foot screw that is arranged between the first connecting plate 11 and the second connecting plate 25 and connects the first connecting plate 11 and the second connecting plate 25, and adjusts the vertical position of the ruler by adjusting the foot screw. Spend.

Fix the above-mentioned adjustable indium steel ruler at the planned elevation observation point on the top of the enclosure wall (slope), and observe them one by one through the level instrument to complete a complete leveling measurement.

Leave three Ф8mm round holes on the first connecting plate of the base column, and install a prism on its lower surface; or stick a reflective sheet on the base column, which can be used for horizontal displacement monitoring. Therefore, the horizontal and vertical displacement monitoring points are common.

The following steps can be adopted when the utility model is used:

Step 1: Layout. Do a good job of monitoring and control points; after the crown beam pouring is completed or the top of the slope is hardened, the monitoring points will be arranged according to the requirements of the design and approval monitoring plan, and marks and records will be made.

Step 2: Install the base column. Use expansion screws to fix the base column on the top of the enclosure wall or slope. The square steel plate at the bottom of the base column should be installed basically horizontally, and the connection line between the 3 round holes or grooves on the top of the base column and the edge of the foundation pit should be as close as possible. parallel.

Step 3: Install foot screw and ruler. For option one, first pass the bolt upwards through the opening of the first connecting plate to ensure that the screw head is embedded in the enlarged groove, then put on a high-strength spring, pass through the round hole of the second connecting plate, and screw on the nut. Stand the ruler on the top of the base column to complete the installation. For the second option, the foot screw is between the first connecting plate and the second connecting plate, and the fixed connection is sufficient.

Step 4: Adjust the foot screw to center the bubble and make the ruler vertical.

Step 5: Leveling. With the precision electronic level, the geometric leveling method is adopted, and the leveling base point is used as the starting point to carry out leveling measurement on each monitoring point in the deformation monitoring network one by one, and finally return to the initial reference point to form a closed loop to complete a complete leveling measurement.

Step 6: After the entire monitoring project is over, remove the ruler body, footscrew and base column in turn, recycle them, and move them to the next project for reuse.

Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art can also make equivalent modifications or replacements without violating the spirit of the present utility model. These equivalent modifications or replacements are all included in the claims of this application. within the limited range.

Claims (10)

1. A leveling rod for foundation pit monitoring, characterized in that: it comprises a base column and a scale body, the top of the base column is provided with a first connecting plate, and the scale body has a first side, a second side and a third side The side is in the shape of a regular triangular prism, the first side and the second side are each provided with an indium steel ruler, the bottom of the ruler body is provided with a second connecting plate, the second connecting plate and the axis of the ruler body are perpendicular to each other, and the second connecting plate Or a level is provided on the scale body, the first connecting plate and the second connecting plate are connected through an adjustment structure, and the adjustment structure can adjust the scale body to a vertical state. 2. The leveling rod for foundation pit monitoring according to claim 1, characterized in that: the height of the base column is adjustable. 3. The leveling rod for foundation pit monitoring according to claim 2, characterized in that: the base column includes a first outer tube and a first inner tube sleeved in the first outer tube, and the first inner tube can be relatively The first outer tube moves up and down, the bottom of the first outer tube is provided with a base plate, along the first outer tube and the first inner tube are provided with a number of equidistant fixing holes, the first outer tube and the first inner tube The tube can be locked by means of a fixing bolt passing through said fixing hole. 4. The leveling rod for foundation pit monitoring according to claim 2, characterized in that: the base column comprises a second outer tube and a second inner tube sleeved in the second outer tube, and the second outer tube The base plate is provided at the bottom of the second outer tube, the inner wall of the second outer tube is provided with an internal thread, the outer wall of the second inner tube is provided with an external thread engaged with the internal thread, the second inner tube can rotate up and down relative to the second outer tube, and the second inner tube can rotate up and down relative to the second outer tube. A buckle pin is arranged on the top of the second outer tube to fix the second inner tube. 5. The leveling rod for foundation pit monitoring according to claim 1, characterized in that: the level comprises a two-dimensional bubble level arranged on the second connecting plate. 6 . The leveling rod for foundation pit monitoring according to claim 1 , wherein the leveling instrument comprises a circular air bubble leveling instrument arranged on the third side of the ruler body or on the second connecting plate. 7 . 7. The leveling rod for foundation pit monitoring according to claim 1, characterized in that: a number of circular holes are symmetrically distributed on the first connecting plate and the second connecting plate, and the adjustment structure includes The spring between the plate and the second connecting plate, and the bolts that pass through the round hole of the first connecting plate, the spring, and the round hole of the second connecting plate in turn, are tightened by nuts, and the first connecting plate is at the bottom of each round hole Provides a sinker that matches the bolt head of the bolt. 8. The leveling rod for foundation pit monitoring according to claim 1, characterized in that: the adjustment structure includes being arranged between the first connecting plate and the second connecting plate and connecting the first connecting plate and the second connecting plate Connected foot screw. 9. The leveling rod for foundation pit monitoring according to claim 1, characterized in that: a prism that can be used for horizontal displacement monitoring is provided on the bottom of the first connecting plate. 10. The leveling rod for foundation pit monitoring according to claim 1, characterized in that: the base column is provided with a reflective sheet that can be used for horizontal displacement monitoring.