Measuring weight for measuring elevation of underwater concrete sealing bottom of bearing platform

Abstract

The utility model discloses a measuring weight used for bearing platform underwater concrete sealing bottom elevation measurement, which comprises a weight disc, a steel wire measuring rope and a concrete weight, one end of the steel wire measuring rope is fixed on the weight disc, the other end of the steel wire measuring rope is connected with the top of the concrete weight, the concrete weight comprises a hollow steel pipe, a solid concrete column and an iron hook, the solid concrete column is located in the hollow steel pipe, and the iron hook is fixed to the upper portion of the solid concrete column and connected with the steel wire measuring rope. And a group of cloth strip knot structures convenient for reading are arranged on the steel wire measuring rope. The bottom of the concrete weight is cylindrical instead of conical, the concrete weight can stand stably on a fresh concrete layer without falling down, and accurate reading can be achieved after the steel wire measuring rope is straightened; during measurement, cloth strip knots are conspicuous and easy to distinguish, reading is fast, and labor is saved during frequent measurement; when not used, the concrete weight can be stored in the hollow rope disc, the occupied space is small, and the eccentric handle can support the bottom to facilitate carrying and stacking.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering construction measurement, in particular to a measuring weight used for underwater concrete bottom elevation measurement of a cap. Background Art

[0002] The construction process of the buried bridge cap in water is to first sink the water retaining cofferdam structure to a certain depth below the mud surface, clean the underwater mud and rocks in the closed water retaining cofferdam structure to the designed depth, and then pour the underwater bottom sealing concrete to the designed elevation. After the underwater bottom sealing concrete construction is completed, the closed structure has a bottom plate, which completely isolates the cap construction space from the surrounding waters. After the water is pumped out in the closed space, the cap dry construction can be carried out. When sealing the bottom of the underwater concrete of the cap water retaining cofferdam, it is necessary to frequently measure the elevation of the underwater fresh concrete surface. During the construction process, the mud is surging and the water quality is turbid and complex. The influence of the hydration heat during the concrete pouring process causes the water temperature to change rapidly, and a layer of floating slurry accumulates above the fresh concrete poured at the bottom. The water depth cannot be measured using a depth sounder; using conventional measuring rope tools (wire measuring rope + iron weight), iron (7.85g / cm 3 ) has a greater specific gravity than concrete (2.5g / cm 3 ), the iron weight will drill into the fresh concrete to a certain depth. After testing (i.e. putting fresh concrete in a dry container to simulate the underwater measuring weight operation), the drilling depth is greater than 13cm, and the elevation of the fresh concrete surface cannot be accurately measured. The whole meter scale numbers on the wire measuring rope are small. When measuring, the wire measuring rope needs to be accurately positioned at the corresponding reference point and pulled close to the human eye to read the value. The reading is not quick and laborious when measured frequently.

[0003] For example, patent CN211973592U discloses a hanging hammer for measuring the elevation of the poured underwater concrete surface, which includes a hammer body cast by concrete and a steel bar buried in the hammer body; the top of the hammer body is a hemisphere, and the bottom of the hammer body is a cone; the steel bar passes through the central axis of the hemisphere and the cone, and the top and bottom ends of the steel bar extend out of the hemisphere and the cone respectively; the top of the steel bar is bent into a ring shape, which is used to tie one end of the measuring rope. The conical structure is easy to fall over in the fresh concrete layer, affecting the accuracy of the measurement data, and the reading is not fast. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a measuring weight for measuring the elevation of the underwater concrete bottom of a cap, so as to achieve the purpose of convenient, accurate and efficient measurement.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] The measuring weight used for measuring the elevation of the underwater concrete bottom of a foundation comprises a weight disc, a steel wire measuring rope and a concrete weight, wherein one end of the steel wire measuring rope is fixed on the weight disc, and the other end of the steel wire measuring rope is connected to the top of the concrete weight, and the concrete weight comprises a hollow steel pipe, a solid concrete column and an iron hook, wherein the solid concrete column is located in the hollow steel pipe, and the iron hook is fixed on the top of the solid concrete column and connected to the steel wire measuring rope; a group of cloth strip knot structures for facilitating reading are arranged on the steel wire measuring rope.

[0007] Further:

[0008] The weight drum comprises a hollow rope drum, a handle structure and circular baffles arranged on both sides of the hollow rope drum. A cavity for accommodating the concrete weight is formed in the hollow rope drum, and the handle structure is arranged on one side of the cavity of the hollow rope drum.

[0009] The steel wire measuring rope is covered with meter buckles at the whole meter positions, and reading numbers are engraved on the meter buckles; and the cloth strip knots are arranged at the positions corresponding to the meter buckles.

[0010] The overall structure of the concrete weight is a cylindrical structure.

[0011] The specific gravity of the concrete block is 3-3.5 g / cm 3 .

[0012] The circular baffle is provided with a fixing hole for fixing one end of the steel wire measuring rope.

[0013] The handle structure comprises a connected rolling cover and a handle body, and the rolling cover is rotatably arranged in the cavity.

[0014] The cloth strip knot structure comprises a white cloth strip knot and a red cloth strip knot; the red cloth strip knot is arranged at a position of exactly 5 meters, and the white cloth strip knot is arranged at a position of not exactly 5 meters.

[0015] The handle body is eccentrically arranged.

[0016] Circular slideways are arranged on both sides of the inner circle of the hollow rope drum, and the rolling cover straddles the circular slideways on both sides of the inner circle of the hollow rope drum.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The measuring weight used for measuring the elevation of the underwater concrete bottom of the pedestal has a reasonable structural design. The bottom of the concrete weight is cylindrical instead of conical. It can stand firmly on the fresh concrete layer and can accurately read the value after the steel wire measuring rope is straightened. When measuring, the knot of the cloth strip is conspicuous and easy to distinguish, and the reading is quick and labor-saving during frequent measurements. When not in use, the concrete weight can be stored in a hollow rope drum, which occupies little space, and the eccentric handle can support the bottom for easy transportation and stacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following is a brief description of the contents and symbols in the drawings of this specification:

[0020] Figure 1 It is an overall schematic diagram of the measuring weight of the utility model.

[0021] Figure 2 It is a schematic diagram of the cross section of the concrete weight of the utility model.

[0022] Figure 3 It is a schematic diagram of the structure of the tumbler of the utility model.

[0023] Figure 4 It is a schematic diagram of the concrete weight of the utility model being located in the weight plate.

[0024] Figure 5 The utility model is a schematic diagram of a cloth strip knotted steel wire measuring rope.

[0025] In the figure:

[0026] 1. Rotor, 101. Hollow rope drum, 102. Circular baffle, 103. Fixing hole, 104. Handle body, 105. Eccentric handle structure, 106. Roller cover, 107. Circular slide,

[0027] 2. Cloth strip knot wire measuring rope, 201. Wire measuring rope, 202. Cloth strip knot structure,

[0028] 3. Concrete weight, 301. Hollow steel pipe, 302. Solid concrete column, 303. Iron hook. DETAILED DESCRIPTION

[0029] The specific implementation of the utility model will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0030] like Figures 1 to 5 As shown, the measuring weight for measuring the elevation of the underwater concrete bottom of the foundation includes a weight plate 1, a wire measuring rope and a concrete weight 3; one end of the wire measuring rope is fixed on the weight plate, the wire measuring rope is wound on the weight plate, and the other end of the wire measuring rope is connected to the top of the concrete weight.

[0031] The concrete weight 3 includes a hollow steel pipe 301, a solid concrete column 302 and an iron hook 303. The hollow steel pipe is a hollow circular steel pipe, which serves as a mold for the solid concrete column. The solid concrete column is located inside the hollow steel pipe. The iron hook is fixed on the upper part of the solid concrete column and is connected to a steel wire measuring rope 201. A group of cloth strip knot structures 202 are provided on the steel wire measuring rope for easy reading.

[0032] The weight 1 includes a hollow rope drum 101, a handle structure and circular baffles 102 arranged on both sides of the hollow rope drum. An annular space for winding the wire measuring rope is formed between the circular baffles on both sides. A cavity for accommodating the concrete weight is formed in the hollow rope drum, and the handle structure is arranged on one side of the cavity corresponding to the hollow rope drum.

[0033] The overall structure of the concrete weight is cylindrical; the bottom of the concrete weight is cylindrical, not conical, and it can stand firmly on the fresh concrete layer. After straightening the wire measuring rope, accurate readings can be obtained; the specific gravity of the concrete weight is 3-3.5g / cm 3 , slightly larger than the specific gravity of concrete, it can smoothly penetrate the floating slurry layer and slightly drill into the fresh concrete layer.

[0034] The handle structure includes a connected rolling cover 106 and a handle body 104, and the rolling cover is rotatably arranged in the cavity. Furthermore, circular slideways 107 are arranged on both sides of the inner ring of the hollow rope drum, and the rolling cover straddles the circular slideways on both sides of the inner ring of the hollow rope drum, with a compact structure; the circular slideway on one side of the handle body close to the inner ring is eccentrically arranged to facilitate rotation operation. When not in use, the concrete weight can be stored in the hollow rope drum, which takes up little space, and the eccentric handle can support the bottom for easy transportation and stacking.

[0035] The circular baffle 102 is provided with a fixing hole 103 for fixing one end of the wire measuring rope; the wire measuring rope is attached with a meter buckle at the whole meter position, and the meter buckle is engraved with a reading number; the cloth strip knot is set at the corresponding meter buckle position. When measuring, the cloth strip knot is more conspicuous, easy to identify, and the reading is quick, which is more labor-saving when measuring frequently.

[0036] Furthermore, the cloth strip knot structure includes white cloth strip knots and red cloth strip knots; the red cloth strip knots are arranged at the exact 5m position, and the white cloth strip knots are arranged at the non-exact 5m position. When the red cloth strip knots are seen, the exact 5m reading can be directly read, and the number of white cloth strip knots can be counted from the red cloth strip knot to the reference point mark position, and the reading is quick.

[0037] The preferred specific embodiments of the present utility model are:

[0038] like Figures 1 to 5 As shown, a measuring weight that can be used for underwater concrete bottom elevation measurement of a cap cofferdam relates to the technical field of bridge engineering construction measurement, which includes a concrete weight, a weight plate, and a cloth strip tied with a steel wire measuring rope; the utility model is a construction device that can overcome adverse conditions and facilitate measurement.

[0039] like Figure 1 and Figure 2 As shown, the concrete weight is composed of a thin-walled hollow steel pipe 301 (wall thickness 0.3 cm × outer diameter 11.2 cm × height 9 cm), a solid concrete column 302 (diameter 10.6 cm × height 9 cm), and an iron hook 303, with a weight of about 2.9 kg and a specific gravity of about 3.2 g / cm 3. The iron hook 303 is bent into a "J" shape with iron wire with a certain rigidity. A thin-walled hollow steel pipe is used as a mold, filled with fresh concrete, and then the iron hook is inserted to a certain height (2cm) to be exposed. After the concrete solidifies, the concrete weight is completed. These materials are very common on construction sites and do not require welding. The production is very simple and convenient. During use, the thin-walled hollow steel pipe serves as a protective cover for the solid concrete column to prevent the solid concrete column from being damaged or missing blocks; the bottom of the concrete weight is cylindrical, not conical, and it can stand firmly on the fresh concrete layer without falling. After the steel wire measuring rope is straightened, accurate readings can be obtained.

[0040] It is invisible underwater, and the feel replaces the sight. The weight and specific gravity of the weight are very important. If the weight is too small, it will affect the feel, and if the weight is too heavy, it will be difficult to lift. After testing, the weight of the concrete weight is about 2.9kg, which is more suitable. The specific gravity of the concrete weight is about 3.2g / cm 3 , slightly larger than the concrete specific gravity (2.5g / cm 3 ), can smoothly penetrate the floating slurry layer and slightly drill into the fresh concrete layer. After testing (i.e. putting fresh concrete in a dry container to simulate the underwater measuring weight operation), when the weight is used to quickly measure the reading, the bottom of the concrete weight drills into the fresh concrete layer to a depth of about 3cm. The allowable deviation of the underwater bottom concrete elevation of the pedestal is 30cm. The measurement accuracy of the concrete weight can meet the requirements (take 1 / 10 of the allowable deviation).

[0041] like Figure 3 and Figure 4 As shown, the drum includes a hollow rope drum 101 and an eccentric handle structure 105. The hollow rope drum is a plastic structure. The outer ring is used to wind the steel wire measuring rope layer by layer. Circular baffles are arranged on both sides of the outer ring. A circular hole of appropriate size is opened at the bottom of the circular baffle to become a fixing hole (diameter 4mm). The hollow cavity of the inner ring can just place the concrete drum. Circular slides are arranged on both sides of the inner ring. The eccentric handle is a plastic structure, which consists of a rolling cover and a handle. The rolling cover straddles the circular slides on both sides of the inner ring of the hollow rope drum, and the handle is close to the circular slide on one side of the inner ring. Grasp the eccentric handle with one hand and push the hollow rope drum with the other hand. The hollow rope drum can rotate in a circle around the eccentric handle; when the hollow cavity of the inner ring of the hollow rope drum stores the concrete drum, the eccentric handle can support the bottom for easy transportation and stacking.

[0042] like Figure 5 As shown, the cloth strip knot wire measuring rope 2 includes a wire measuring rope, a white cloth strip knot, and a red cloth strip knot. The wire measuring rope (diameter 2mm) is a commodity, characterized in that a meter buckle is attached to the wire rope 201 at the whole meter, and a reading number is engraved on the meter buckle for reading when the wire rope is measured. The small reading end of the wire measuring rope is inserted into the iron hook of the concrete weight to tie a knot. When the wire rope is straightened at the "1m" meter buckle, the position of the knot is adjusted so that the distance from the bottom of the concrete weight to the upper end of the "1m" meter buckle (on the side of the large reading direction) is 1m; the large reading end of the wire measuring rope is inserted into the fixed hole of the weight plate to tie a knot, and the width of the knot is greater than the diameter of the fixed hole (4mm).

[0043] According to the requirements of underwater concrete bottom sealing depth measurement of the foundation, a red or white cloth strip is inserted into the upper end of each meter buckle within the commonly used reading range of the wire measuring rope and tied and fastened. The red cloth strip knot is arranged at the whole 5m position, and the white cloth strip knot is arranged at the non-whole 5m position. The cutting size of the red and white cloth strips is 20cm long × 3cm wide. When measuring, the cloth strip knot is more conspicuous and easy to identify. When you see the red cloth strip knot, you can directly read the whole 5m reading. Count the number of white cloth strip knots from the red cloth strip knot to the reference point mark position. Count continuously from the read whole 5m reading to determine the nearest whole meter to the reference point mark position, and then estimate or measure the distance between the reference point mark position and the nearest whole meter read that is less than one meter. In this way, the depth is measured, the reading is quick, and it is more labor-saving when measuring frequently.

[0044] The above is only an explanation of the preferred embodiments of the present invention. The above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0045] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A measuring weight for measuring the elevation of underwater concrete bottom of a cap, comprising a weight plate, a wire measuring rope and a concrete weight, wherein one end of the wire measuring rope is fixed on the weight plate, and the other end of the wire measuring rope is connected to the top of the concrete weight, characterized in that: The concrete weight includes a hollow steel pipe, a solid concrete column and an iron hook. The solid concrete column is located in the hollow steel pipe. The iron hook is fixed on the top of the solid concrete column and connected to a steel wire measuring rope. The steel wire measuring rope is provided with a group of cloth knot structures for easy reading.

2. The measuring weight for measuring the elevation of underwater concrete bottom of a cap according to claim 1, characterized in that: The weight drum comprises a hollow rope drum, a handle structure and circular baffles arranged on both sides of the hollow rope drum. A cavity for accommodating the concrete weight is formed in the hollow rope drum, and the handle structure is arranged on one side of the cavity of the hollow rope drum.

3. The measuring weight for measuring the elevation of underwater concrete bottom of a cap according to claim 1, characterized in that: The steel wire measuring rope is covered with meter buckles at the whole meter positions, and reading numbers are engraved on the meter buckles; and the cloth strip knots are arranged at the positions corresponding to the meter buckles.

4. The measuring weight for measuring the elevation of underwater concrete bottom of a cap according to claim 1, characterized in that: The overall structure of the concrete weight is a cylindrical structure.

5. The measuring weight for measuring the elevation of underwater concrete bottom of a cap according to claim 1, characterized in that: The specific gravity of the concrete block is 3-3.5 g / cm 3 .

6. The measuring weight for measuring the elevation of underwater concrete bottom of a cap according to claim 2, characterized in that: The circular baffle is provided with a fixing hole for fixing one end of the steel wire measuring rope.

7. The measuring weight for measuring the elevation of the underwater concrete bottom of a cap as claimed in claim 2, characterized in that: The handle structure comprises a connected rolling cover and a handle body, and the rolling cover is rotatably arranged in the cavity.

8. The measuring weight for measuring the elevation of underwater concrete bottom of a cap as claimed in claim 3, characterized in that: The cloth strip knot structure comprises a white cloth strip knot and a red cloth strip knot; the red cloth strip knot is arranged at a position of exactly 5 meters, and the white cloth strip knot is arranged at a position of not exactly 5 meters.

9. The measuring weight for measuring the elevation of underwater concrete bottom of a cap according to claim 7, characterized in that: The handle body is eccentrically arranged.

10. The measuring weight for measuring the elevation of underwater concrete bottom of a cap according to claim 7, characterized in that: Circular slideways are arranged on both sides of the inner circle of the hollow rope drum, and the rolling cover straddles the circular slideways on both sides of the inner circle of the hollow rope drum.

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