CN212896520U - Measuring tool for thickness of cast-in-place pile sediment - Google Patents
Measuring tool for thickness of cast-in-place pile sediment Download PDFInfo
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- CN212896520U CN212896520U CN202021905187.7U CN202021905187U CN212896520U CN 212896520 U CN212896520 U CN 212896520U CN 202021905187 U CN202021905187 U CN 202021905187U CN 212896520 U CN212896520 U CN 212896520U
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Abstract
The utility model provides a measuring tool of bored concrete pile sediment thickness belongs to the room and builds the foundation construction field, including a measuring tool of bored concrete pile sediment thickness, suspend in midair the piece including body, first piece and the second of suspending in midair, wherein: one end of the first suspension piece is arranged on one side of the body, and the other end of the first suspension piece is provided with a first suspension position; one end of the second suspension piece is arranged on the other side of the body, and the other end of the second suspension piece is provided with a second suspension position. The beneficial effects of the utility model are that reduce the technique and the experience degree of difficulty of mud and sediment interface measurement, the acceptance work of the unit of leading reason in fact and the unit of construction unit sediment thickness, guarantee bored concrete pile construction quality.
Description
Technical Field
The utility model belongs to basic construction field is built in the room, especially, relate to a measuring tool of bored concrete pile sediment thickness.
Background
The thickness of sediment at the bottom of the hole of the slurry retaining wall cast-in-situ bored pile has a crucial influence on the bearing capacity of the cast-in-situ pile. According to the measured data of the relevant tests, the bearing capacity of the pile changes with the change of the thickness of the sediment, and when the thickness of the sediment exceeds a certain value, the ultimate resistance Qp of the pile end is determined by the nature of the sediment and is not related to the soil quality of the bearing stratum.
Therefore, the current construction acceptance standard puts higher requirements on the thickness of the sediment at the bottom of the cast-in-situ bored pile hole. GB50202-2018 stipulates that the maximum sediment thickness allowable value of the hole bottom of the cast-in-situ bored pile is as follows: the length of the end bearing pile is less than or equal to 50 mm; friction pile ≦ 150 mm. Therefore, the sediment thickness of the hole bottom is reduced, the sediment thickness is controlled within a certain numerical range, and the sediment thickness of the cast-in-situ bored pile needs to be accurately measured.
If the sediment thickness of bored concrete pile is too big, a large amount of subsides will take place for bored concrete pile when bearing the load, and the bearing capacity of bored concrete pile reduces simultaneously, influences the quality and the intrinsic safety of building, therefore the sediment thickness inspection of bored concrete pile is a key work in the construction control. Sediment thickness detection is an important content of inspection and acceptance of supervision units and construction units, but because sediment thickness measurement is physical activity, experience activity and muddy working surface, the sediment thickness measurement is generally completed by drilling workers, the workers report the sediment thickness measurement to detection personnel, and the detection personnel generally do not carry out sediment thickness detection because the workers cannot operate.
The former tools for measuring the thickness of the sediment are a measuring rope and a hanging hammer, the hanging hammer is generally a thick reinforcing steel bar with the thickness of 300-400 mm, the weight is 3.5-4 KG, when the hanging hammer enters the sediment, a measurer cannot feel, when most of the hanging hammer enters the sediment, the measurer begins to feel the change of the output, so an experienced measurer cannot well master the interface of slurry and the sediment, and the thickness of the sediment measured by the tools is generally smaller than 200-300 mm.
The conventional sediment thickness measuring methods are mainly two, and the first method is a heavy hammer method: the measurement comprises the following steps: 1. measuring the elevation of the steel casing by using a measuring instrument; 2. calculating the total length of the rotating rod entering the steel casing; 3. a heavy hammer with the weight of about 0.5KG is hung at the zero end of the rope measuring; 4. slowly putting the measuring rope into the pile hole, and lifting the heavy hammer up and down by hand after the heavy hammer reaches the top surface of the sediment to ensure that the heavy hammer really reaches the bottom; 5. the sediment thickness is obtained by subtracting the reading of the rope ruler and the height of the heavy hammer from the total length of the rotating rod entering the steel casing. The depth of the heavy hammer is below the interface of the mud and the sediment, so the sediment thickness measured by the method is smaller.
The second method is a cone and disc measuring method, which comprises the following steps: 1. a measuring cone of about 1KG is hung at the zero end of the measuring rope; 2. slowly putting the measuring rope into the pile hole, and lifting the measuring cone up and down by hands after the measuring cone reaches the bottom of the pile hole to ensure that the measuring cone really reaches the bottom; 3. a measuring disc of about 1KG is hung at the zero end of the other measuring rope; 4. slowly putting the measuring rope into the pile hole, and lifting the measuring disc up and down by hand after the measuring disc reaches the top surface of the sediment to ensure that the measuring disc is really at the bottom; 5. the difference of the measured readings of the measuring cone and the measuring disc is the thickness of the sediment. Because the weight of the measuring cone is smaller, the reading of the measuring cone is smaller, and the measurement value of the sediment thickness is further influenced to be smaller.
Therefore, how to measure the interface (sediment thickness) between the slurry and the sediment becomes a great problem to be solved.
Disclosure of Invention
The utility model discloses a solve the problem among the background art, provide a measuring tool of bored concrete pile sediment thickness.
In order to solve the technical problem, the utility model discloses a technical scheme is: a measuring tool of bored concrete pile sediment thickness, includes body, first suspension member and second suspension member, wherein:
one end of the first suspension piece is arranged on one side of the body, and the other end of the first suspension piece is provided with a first suspension position;
one end of the second suspension piece is arranged on the other side of the body, and the other end of the second suspension piece is provided with a second suspension position.
Preferably, the body is provided in a circular ring configuration.
Preferably, the first suspension pieces are provided in plurality, and one ends of the first suspension pieces are all fixedly connected to the body and are uniformly distributed along the circumferential direction of the body;
the other ends of the first suspension pieces are fixedly connected to form a first node, and the first suspension position is fixedly arranged at the first node.
Preferably, the second suspension member includes a first suspension rod and a second suspension rod, wherein:
the number of the first suspension rods is multiple, and one ends of the multiple first suspension rods are fixedly connected to the body and are uniformly distributed along the circumferential direction of the body;
a plurality of the other end fixed connection of first suspension pole forms the second node, the one end fixed set up in the second node department of second suspension pole, the other end of second suspension pole is equipped with the second and hangs the position.
Preferably, the first suspension member is configured as a flexible body structure, and the second suspension member is configured as a rigid body structure.
Preferably, the first suspension member is configured as a chain, and the first suspension rod and the second suspension rod are both configured as a rod.
Preferably, the first hanging position and the second hanging position are both provided with galvanized nuts.
Preferably, the body, the first suspension part and the second suspension part are made of galvanized metal parts.
The utility model has the advantages and positive effects that: due to the adoption of the technical scheme, the measuring method is simple and convenient, and the measured value is accurate; the technical and empirical difficulty of measuring the interface of the slurry and the sediment is reduced; and the checking and accepting work of the sediment thickness of the supervision unit and the construction unit is carried out, so that the construction quality of the cast-in-place pile is ensured.
Drawings
Fig. 1 is a schematic structural view of a measuring tool for the sediment thickness of a cast-in-place pile according to the present invention;
fig. 2 is a schematic plan structure view of the measuring tool for the thickness of the cast-in-place pile sediment of the present invention;
fig. 3 is a schematic view of the vertical structure of the measuring tool for the thickness of the cast-in-place pile sediment of the present invention;
FIG. 4 is a schematic view of the structure of the mud-sediment interface measurement;
FIG. 5 is a schematic view of the structure of the pile bottom measurement;
fig. 6 is a schematic view of the structure when the thickness of the sediment is smaller than that of the sediment measuring tool.
In the figure:
1. body 3, first suspension part 2, first suspension position
4. A first suspension rod 5, a second suspension rod 6 and a second suspension position
Detailed Description
The present embodiment provides a tool for measuring a thickness of a cast-in-place pile sediment, fig. 1 is a schematic structural diagram of the present embodiment, and as shown in fig. 1, the tool includes a body 1, a first suspension member 3, and a second suspension member, wherein:
one end of the first suspension piece 3 is arranged on one side of the body 1, and the other end of the first suspension piece 3 is provided with a first suspension position 2; one end of the second suspension piece is arranged on the other side of the body 1, and the other end of the second suspension piece is provided with a second suspension position 6, so that a mud and sediment interface measuring tool is provided, the mud and sediment interface can be simply, conveniently and accurately measured, the sediment thickness can be measured, and the technical and experience difficulty of mud and sediment interface measurement can be reduced; and the checking and accepting work of the sediment thickness of the supervision unit and the construction unit is carried out, so that the construction quality of the cast-in-place pile is ensured.
As an optional implementation manner, fig. 2 is a schematic plane structure diagram of this embodiment, as shown in fig. 2, the body 1 is configured as a circular ring structure, in this embodiment, the body 1 is a galvanized metal circular ring with a thickness of 6mm, the outer diameter is set to 200mm, the inner diameter is set to 100mm, and the body can be manufactured by water welding cutting and grinding with a grinding wheel.
As an optional implementation manner, fig. 3 is an elevation view of the present embodiment, as shown in fig. 3, a plurality of first suspension members 3 are provided, one end of each of the plurality of first suspension members 3 is fixedly connected to the body 1 and is uniformly distributed along the circumferential direction of the body 1, in the present embodiment, 3 first suspension members 1 are provided and are uniformly distributed along the circumferential direction of the body 1;
the other ends of the first suspension pieces 3 are fixedly connected to form a first node, and the first suspension positions 2 are fixedly arranged at the first node;
specifically, the first suspension member 1 is configured as a flexible body structure, in this embodiment, the first suspension member 1 is configured as a chain, and preferably, the first suspension member 1 is a galvanized metal chain, which can be obtained by purchasing galvanized metal chains on the market.
As an alternative embodiment, the second suspension comprises a first suspension bar 4 and a second suspension bar 5, wherein:
the number of the first suspension rods 4 is multiple, one end of each of the multiple first suspension rods 4 is fixedly connected to the body 1 and is uniformly distributed along the circumferential direction of the body 1, and in the embodiment, three first suspension rods 4 are provided;
the other end fixed connection of a plurality of first suspension poles 4 forms the second node, and the one end of second suspension pole 5 is fixed to be set up in second node department, and the other end of second suspension pole 5 is equipped with the second and hangs position 6.
Specifically, the second suspension member is configured as a rigid body structure, preferably, the first suspension rod 4 and the second suspension rod 5 are both configured as rod members, in this embodiment, the first suspension rod 4 is a galvanized rod member with a diameter of 20mm, the length of the galvanized rod member is 230mm, and the galvanized rod member is cut by using a grinding wheel cutting machine, and the second suspension rod 5 is a galvanized rod member with a diameter of 18mm, the length of the galvanized rod member is 50mm, and the galvanized rod member is cut by using a grinding wheel cutting machine;
as an alternative embodiment, galvanized nuts are arranged at the first hanging position 2 and the second hanging position 6, and carbon dioxide arc welding is adopted between the components.
A method for measuring the thickness of the cast-in-place pile sediment comprises the following steps of:
s1: FIG. 4 is a schematic structural diagram of mud and sediment interface measurement, as shown in FIG. 4, a measuring rope hung with a cast-in-place pile sediment measuring tool is slowly placed into a pile hole, when the cast-in-place pile sediment measuring tool reaches the interface of mud and sediment, the interface of mud and sediment is accurately judged through the stress change and the descending speed change of the measuring rope, and the numerical value of the measuring rope is read;
specifically, when the thickness of the sediment of the slurry retaining wall cast-in-situ bored pile is measured, the hole opening sediment and the slurry are cleaned, and the pile hole is covered with the grid net, so that the safety of detection personnel is ensured. The measuring tool weight is 3.7kg, measure the height of "sediment thickness measuring tool" in advance, safety hook of survey rope zero point end ligature, hang measuring tool on safety hook through first position 2 that hangs, put into the stake hole slowly to the survey rope, when survey rope atress obviously diminishes, when measuring tool descent speed obviously reduces, can judge the interface of mud and sediment, it is several times down to move about with the hand this moment, ensure the accurate interface of judging mud and sediment, and the reading on the survey rope.
S2: fig. 5 is a schematic structural diagram of pile bottom measurement, as shown in fig. 5, the measuring rope is stabilized to prevent the measuring rope from swinging left and right and falling down, the measuring rope is slowly moved forward into the pile hole after 2 minutes, when the measuring rope is not stressed and the measuring tool does not fall down any more, the pile bottom can be determined, and at the moment, the measuring tool is moved up and down by hand to ensure that the measuring tool reaches the pile bottom, and the value of the measuring rope is read;
s3: fig. 6 is a schematic view of a structure when the sediment thickness is smaller than the sediment measuring tool, as shown in fig. 6, when the sediment thickness is smaller than the sediment measuring tool, the measuring tool is hung on a safety hook, a measuring rope is slowly put into a pile hole, when the stress of the measuring rope is obviously reduced, the descending speed of the measuring tool is obviously reduced, the interface between slurry and sediment can be judged, and at the moment, the measuring rope is moved up and down by hand for a few times, so that the interface between slurry and sediment is accurately judged, and the value of the measuring rope is read.
The degree of the measuring rope at the interface of mud and sediment is subtracted from the reading of the measuring rope at the bottom of the pile to obtain the sediment thickness.
The utility model has the advantages that:
1. providing a mud and sediment interface measuring tool;
2. the technical and empirical difficulty of measuring the interface of the slurry and the sediment is reduced;
3. and (5) carrying out the checking and accepting work of the sediment thickness of the real supervision unit and the construction unit.
4. The construction quality of the cast-in-place pile is ensured.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (8)
1. The utility model provides a measuring tool of bored concrete pile sediment thickness which characterized in that: including body, first suspension piece and second suspension piece, wherein:
one end of the first suspension piece is arranged on one side of the body, and the other end of the first suspension piece is provided with a first suspension position;
one end of the second suspension piece is arranged on the other side of the body, and the other end of the second suspension piece is provided with a second suspension position.
2. The tool for measuring the thickness of the cast-in-place pile sediment according to claim 1, wherein: the body is arranged to be of a circular ring structure.
3. The tool for measuring the thickness of the cast-in-place pile sediment according to claim 2, wherein: the first suspension pieces are arranged in a plurality of numbers, and one ends of the first suspension pieces are fixedly connected to the body and are uniformly distributed along the circumferential direction of the body;
the other ends of the first suspension pieces are fixedly connected to form a first node, and the first suspension position is fixedly arranged at the first node.
4. The tool for measuring the thickness of the cast-in-place pile sediment according to claim 3, wherein: the second suspension includes a first suspension rod and a second suspension rod, wherein:
the number of the first suspension rods is multiple, and one ends of the multiple first suspension rods are fixedly connected to the body and are uniformly distributed along the circumferential direction of the body;
a plurality of the other end fixed connection of first suspension pole forms the second node, the one end fixed set up in the second node department of second suspension pole, the other end of second suspension pole is equipped with the second and hangs the position.
5. The tool for measuring the thickness of the cast-in-place pile sediment according to claim 4, wherein: the first suspension piece is arranged into a flexible body structure, and the second suspension piece is arranged into a rigid body structure.
6. The tool for measuring the thickness of the cast-in-place pile sediment according to claim 5, wherein: the first suspension piece is arranged to be a chain, and the first suspension rod and the second suspension rod are both arranged to be rod pieces.
7. The tool for measuring the thickness of the cast-in-place pile sediment according to claim 1, wherein: and galvanized nuts are arranged at the first hanging position and the second hanging position.
8. The tool for measuring the thickness of the cast-in-place pile sediment according to claim 1, wherein: the body, the first suspension piece and the second suspension piece are all made of galvanized metal pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021905187.7U CN212896520U (en) | 2020-09-03 | 2020-09-03 | Measuring tool for thickness of cast-in-place pile sediment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021905187.7U CN212896520U (en) | 2020-09-03 | 2020-09-03 | Measuring tool for thickness of cast-in-place pile sediment |
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| Publication Number | Publication Date |
|---|---|
| CN212896520U true CN212896520U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021905187.7U Active CN212896520U (en) | 2020-09-03 | 2020-09-03 | Measuring tool for thickness of cast-in-place pile sediment |
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| Country | Link |
|---|---|
| CN (1) | CN212896520U (en) |
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- 2020-09-03 CN CN202021905187.7U patent/CN212896520U/en active Active
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