CN216689404U - Drilling bored concrete pile concrete face elevation device - Google Patents
Drilling bored concrete pile concrete face elevation device Download PDFInfo
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- CN216689404U CN216689404U CN202122796443.4U CN202122796443U CN216689404U CN 216689404 U CN216689404 U CN 216689404U CN 202122796443 U CN202122796443 U CN 202122796443U CN 216689404 U CN216689404 U CN 216689404U
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Abstract
The utility model discloses a device for marking the height of a concrete surface of a bored pile, which comprises a pile casing arranged in a deep hole, an automatic rotating device, a measuring rope and a hanging ball, wherein the automatic rotating device, the measuring rope and the hanging ball are arranged on the pile casing; the depth of the deep hole is not less than 10 m; the measuring rope is provided with a plurality of scales, one end of the measuring rope is connected with the automatic slewing device, and the other end of the measuring rope is connected with the hanging ball; the automatic slewing device enables the measuring rope to be in a stretched straight state all the time through the plane volute spiral spring, and enables the hanging ball to be partially positioned on the mud layer and partially positioned on the concrete layer and to ascend along with the ascending of the concrete layer; the technical scheme can quickly and accurately measure the elevation of the surface of the poured concrete in construction, and is simple to operate.
Description
Technical Field
The utility model relates to the technical field of building construction, in particular to a concrete surface height marking device for a bored pile.
Background
Along with the continuous development of bridge engineering construction, the application of drilling and pouring underwater concrete pile foundations is more and more extensive.
When the guide pipe is adopted for pouring underwater concrete into the bored pile, the guide pipe needs to be continuously lifted upwards, the guide pipe needs to be buried below the concrete surface for a certain depth in the underwater concrete pouring process according to the standard requirement, and the pouring height needs to exceed a designed certain elevation in order to ensure the pile quality of a pile foundation due to the fact that a large amount of slurry exists in the construction process of the bored pile.
In order to master the elevation of a concrete pouring surface in the pile foundation construction process, the elevation of the poured concrete is usually determined by combining a traditional measuring rope with a hammerhead method in the construction process, the method depends on the experience level of operators to a great extent, great difference exists, the purpose of real-time elevation monitoring cannot be realized, the construction operation is complex, and time and labor are wasted.
Disclosure of Invention
In order to solve the above problems, the present invention provides a device for measuring the elevation of a cast-in-place concrete surface of a bored pile, which can quickly and accurately measure the elevation of the cast-in-place concrete surface during construction and is simple to operate.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a device for marking the concrete surface height of a bored pile is characterized by comprising a pile casing arranged in a deep hole, an automatic rotating device, a measuring rope and a hanging ball, wherein the automatic rotating device, the measuring rope and the hanging ball are arranged on the pile casing; the depth of the deep hole is not less than 10 m; the measuring rope is provided with a plurality of scales, one end of the measuring rope is connected with the automatic slewing device, and the other end of the measuring rope is connected with the hanging ball;
the automatic slewing device enables the measuring rope to be in a stretched straight state all the time through the plane spiral spring, and enables the hanging ball to be partially located on the mud layer and partially located on the concrete layer and to ascend along with the ascending of the concrete layer.
Preferably, the automatic slewing device comprises a shell, a rotating shaft, a spring box and a flat spiral spring, wherein the shell is fixedly installed above the protective cylinder through a support, the rotating shaft is fixedly installed on the shell, the spring box is installed on the rotating shaft in a sleeved mode and is rotationally connected with the shell, the flat spiral spring is installed on the spring box in a wound mode, the inner end of the flat spiral spring is fixedly connected with the rotating shaft, the outer end of the flat spiral spring is connected with a measuring rope, part of the measuring rope is installed on the flat spiral spring in a wound mode, and the flat spiral spring and the measuring rope in the shell are matched to form a disc-shaped structure.
Preferably, the length of the measuring rope is equal to the working length of the flat spiral spring after being unfolded.
Preferably, the housing is mounted to the shroud by a movable tripod.
Preferably, the material of the measuring rope is polyamide fiber.
Preferably, the initial scale of the measuring line is the diameter length of the hanging ball.
Preferably, the interior of the hanging ball is hollow.
Preferably, the hanging ball is made of corrosion-resistant metal materials.
The utility model has the beneficial effects that:
1) the automatic rotation device is adopted to realize the automatic recovery function of the measuring rope, the elevation of the surface of the poured concrete is quickly and accurately measured in the construction process, and the operation is simple.
2) The automatic rotating device always has a tension effect on the hanging ball, and the hanging ball cannot disappear due to the fact that the hanging ball stops rising, so that the measuring rope can be always in a stretched state, and the accuracy of the standard height is guaranteed.
3) When the hanging ball is positioned on the mud layer, the resultant force of the pulling force F of the automatic slewing device to the hanging ball and the buoyancy F1 generated by the mud layer to the hanging ball is always smaller than the gravity G borne by the hanging ball, so that the hanging ball can descend when positioned on the mud layer; when the hanging ball completely enters the concrete layer, the resultant force formed by pulling the buoyancy F2 and F generated by the concrete layer to the hanging ball is larger than G, so that the hanging ball can rise when being in concrete after being completed, and the hanging ball is controlled at the junction of the mud layer and the concrete layer all the time, thereby achieving the purpose of marking the concrete surface height of the bored pile.
Drawings
Fig. 1 is a schematic view of a concrete surface elevation device of a cast-in-situ bored pile according to the present invention.
Description of the reference numerals: 1. protecting the cylinder; 2. rope measurement; 3. hanging a ball; 4. a rotating shaft; 5. a spring case; 6. a flat spiral spring; 7. a housing; 8. a movable tripod.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The first embodiment is as follows:
the device for marking the concrete surface height of the cast-in-place bored pile shown in figure 1 comprises a pile casing 1 arranged in a deep hole, an automatic slewing gear, a measuring rope 2 and a hanging ball 3, wherein the automatic slewing gear, the measuring rope 2 and the hanging ball 3 are arranged on the pile casing 1, the pile casing 1 is positioned at the top of the deep hole, and part of the pile casing 1 extends out of the deep hole; automatic slewer includes casing 7, pivot 4, spring box 5 and flat spiral spring 6, casing 7 is through support fixed mounting in protecting a section of thick bamboo 1 top, 4 fixed mounting of pivot are on casing 7, 5 covers of spring box establish install on pivot 4 and rotate with casing 7 and be connected, flat spiral spring 6 winds and installs on spring box 5, flat spiral spring 6's the inner and 4 fixed connection of pivot, flat spiral spring 6's outer end links to each other with survey rope 2, and partial survey rope 2 winds and installs on flat spiral spring 6, and flat spiral spring 6 and the cooperation of surveying rope 2 in the casing 7 form a disc structure.
Therefore, the automatic slewing device can realize the automatic recovery function of the measuring rope 2, the elevation of the surface of the poured concrete can be quickly and accurately measured in the construction process, and the operation is simple.
Secondly, the automatic rotating device always has a pulling force effect on the hanging ball 3, and the hanging ball 3 cannot disappear due to the fact that the hanging ball stops rising, so that the measuring rope 2 can be always in a stretched state, and the accuracy of the standard height is guaranteed.
In the embodiment of the utility model, the length of the measuring rope 2 is equal to the working length of the expanded flat spiral spring 6.
In the embodiment of the utility model, the shell 7 is mounted on the protective sleeve 1 through a movable tripod 8; particularly, the extending part of the protective cylinder 1 is perforated and then connected with the movable tripod 8 through a bolt, so that the movable tripod 8 is convenient to disassemble, and further the storage and transportation of the movable tripod are convenient.
In the embodiment of the utility model, the material of the measuring rope 2 is polyamide fiber; the arrangement is that the polyamide fiber measuring line 2 is inelastic and has high toughness; it is worth to be noted here that before the measuring rope 2 is used, water is further used for fully soaking for 1 hour, and then the scales are checked; thereby avoiding the measuring rope 2 from influencing the elevation reading due to expansion in the soaking process.
In the embodiment of the utility model, the measuring rope 2 is provided with a plurality of scales, and the initial scale of the measuring rope 2 is the diameter length of the hanging ball 3.
In the embodiment of the utility model, the interior of the hanging ball 3 is hollow, and the surface of the ball body of the hanging ball 3 is dense and waterproof; like this, under the unchangeable circumstances of hanging ball 3 weight, can hang the internal hollow of ball 3 and hang the proportion of 3 whole volumes of ball through the change to the buoyancy that the ball 3 received is hung in the change, and then makes under automatic slewer's pulling force effect, hangs the ball 3 and can be in the interface of concrete layer and mud layer all the time.
In the embodiment of the utility model, the hanging ball 3 is made of corrosion-resistant metal material.
A method for marking the concrete surface of a cast-in-situ bored pile adopts the device for marking the concrete surface of the cast-in-situ bored pile, wherein the device is used for marking the concrete surface of the cast-in-situ bored pile;
in the lifting process of the hanging ball 3 in the deep hole, the gravity borne by the hanging ball 3 is G, and the automatic slewing device always generates a pulling force F to the hanging ball 3 through the measuring rope 2; the F pull is always less than G;
so that the measuring rope 2 is always in a stretched state, and the hanging ball 3 is partially positioned on the mud layer and partially positioned on the concrete layer and can rise along with the rise of the concrete layer.
More preferably, as the hanging ball 3 descends, the F pull gradually increases;
the F-pull gradually decreases as the hoist ball 3 rises.
Further preferably, the mud layer can generate buoyancy F1 to the hanging ball 3, and the concrete layer can generate buoyancy F2 to the hanging ball 3;
when the hanging ball 3 enters the mud layer and the hanging ball 3 is not in contact with the concrete layer, the combined force formed by the pulling of the F1 and the F is always smaller than G;
when the davit 3 is partly in the mud layer and partly in the concrete layer, the combined force of the pulling of the F1, F2 and F can be equal to G;
when the davit 3 is fully inserted into the concrete layer, the combined force of the pulling of the F2 and the F is larger than G.
Specifically, take the diameter of the hanging ball as 10cm, and the gravity borne by the hanging ball as 10.83N for example;
wherein, the volume V of the sphere is 4 pi r3/3＝4×π×0.053/3＝5.24×10-4m3；
The volume weight of the slurry is 1100kg/m3Considering, the buoyancy of the sphere in the mud:
F1＝ρslurry compositiongV＝1100×10×5.24×10-4＝5.764N
Sinking force F of steel bar ball in slurrySink with a hole＝10.83-5.764＝5.068N
The volume weight of the concrete is 24000N/m3Considering, the buoyancy of the sphere in concrete:
F2＝γV＝24000×5.24×10-4＝12.6N>the total weight of the hanging ball is 10-11N
That is, the suspending ball can be located at the junction of the concrete layer and the mud layer and can ascend along with the ascending of the concrete layer.
In addition, for the flat spiral spring, in order to ensure that the steel bar ball can effectively sink, the maximum output torque T of the flat spiral spring2The following requirements should be met:
T2<Msink with a metal plateSinkage force FSink with a metal plateX (spring box radius + strap stack thickness);
in order to ensure that the hanging ball can also rise correctly and synchronously in the concrete rising process and ensure the measurement precision, the maximum output torque T2Should be close to MSink with a metal plate；
The hardness of the material of the flat spiral spring is 40HRC, and the design value sigma of the tensile strength of the material is 1275N/mm2(ii) a By contact-type flat surfacesThe length of the actual site construction pile is calculated according to 60 m; therefore, the working length l of the contact type flat spiral spring is 60 m;
the fixing form of the spring adopts pin type fixing, and the fixing coefficient K3＝0.72；
d1The effective coefficient K can be known by looking up the table when the/h is 254＝0.82；
Maximum output torque: t is a unit of2＝FSink with a metal plate×D2The spring box diameter of 5.068 × 400/2 equals 1013.6N · m where the limit torque is obtained from subsequent calculations: t is a unit ofj＝T2/K3＝1013.6/0.72＝1407.8N·mm
Assuming that the cross-sectional width b of the flat spiral spring material is 8mm,
therefore, the thickness of the flat spiral spring can be calculated according to the specification:
the thickness of the spring is h equal to 1.0mm, the inner diameter of the spring box is further calculated,
spring spindle inner diameter d125h is 25mm, and the working length l of the spring is 60 m;
the number of turns of the spring wound on the spindle can be calculated by the following formula:
when a 60m working length of spring is wound up on the mandrel, a total of 126.3 turns are wound;
according to the number of turns, the radius r is 126.3h +7.5 is 133.8mm when the spring is wound, and the diameter d is 267.6mm
Inner diameter calculation of the spring box:
diameter D of spring-taking box2The number of turns of the spring without applied torque is calculated by the following formula (400 mm):
when the spring with the working length of 60m is not applied with torque, 55.4 turns are coiled in the spring box;
n＝n2-n1126.3-55.4-70.9 turns
Reversing the effective number of turns of the flat spiral spring according to the developed length of the working portion of the material
Therefore, the automatic stretching of the hanging ball can be realized by adopting the flat spiral spring, and in the working environment as long as 60m, the flat spiral spring can be in an effective working state, namely, the hanging ball can also be correctly and synchronously lifted along with the concrete in the lifting process, so that the measurement precision is ensured.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A device for marking the concrete surface height of a bored pile is characterized by comprising a pile casing arranged in a deep hole, an automatic rotating device, a measuring rope and a hanging ball, wherein the automatic rotating device, the measuring rope and the hanging ball are arranged on the pile casing; the depth of the deep hole is not less than 10 m; the measuring rope is provided with a plurality of scales, one end of the measuring rope is connected with the automatic slewing device, and the other end of the measuring rope is connected with the hanging ball; the automatic slewing device enables the measuring rope to be in a stretched straight state all the time through the plane spiral spring, and enables the hanging ball to be partially located on the mud layer and partially located on the concrete layer and to ascend along with the ascending of the concrete layer.
2. The cast-in-place bored pile concrete face elevation device of claim 1, wherein the automatic swiveling mechanism includes a housing, a rotating shaft, a spring box and a flat spiral spring, the housing is fixedly mounted above the protective casing through a bracket, the rotating shaft is fixedly mounted on the housing, the spring box is sleeved on the rotating shaft and is rotatably connected with the housing, the flat spiral spring is wound on the spring box, the inner end of the flat spiral spring is fixedly connected with the rotating shaft, the outer end of the flat spiral spring is connected with the measuring rope, part of the measuring rope is wound on the flat spiral spring, and the flat spiral spring and the measuring rope in the housing are matched to form a disc-shaped structure.
3. The apparatus of claim 1, wherein the length of the measuring cable is equal to the working length of the flat spiral spring after being expanded.
4. A bored pile concrete surface elevation device according to claim 2, wherein the housing is mounted to the casing by means of a movable tripod.
5. The device for marking the concrete surface of the bored pile according to claim 1, wherein the material of the measuring rope is polyamide fiber.
6. The apparatus of claim 1, wherein the initial scale of the measuring line is the diameter length of the hanging ball.
7. The apparatus according to claim 1, wherein the hanging ball is hollow inside.
8. The apparatus according to claim 1, wherein the hoisting ball is made of corrosion-resistant metal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122225709X | 2021-09-14 | ||
| CN202122225709 | 2021-09-14 |
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| Publication Number | Publication Date |
|---|---|
| CN216689404U true CN216689404U (en) | 2022-06-07 |
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| CN202122796443.4U Active CN216689404U (en) | 2021-09-14 | 2021-11-15 | Drilling bored concrete pile concrete face elevation device |
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| CN (1) | CN216689404U (en) |
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- 2021-11-15 CN CN202122796443.4U patent/CN216689404U/en active Active
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