Cast-in-situ bored pile bottom sediment thickness measuring device

Abstract

The utility model relates to the technical field of building construction, and discloses a cast-in-situ bored pile bottom sediment thickness measuring device which comprises a conical protective cover, a telescopic switch, a balance weight piece and a measuring rope. The diameter of the section of the conical protective cover is gradually reduced from the top end to the bottom end, the conical protective cover is provided with an inner cavity, and the bottom end of the conical protective cover is provided with an opening communicating the inner cavity with the outer side of the conical protective cover. The telescopic switch comprises a guide pipe, a spring and a sealing cap, the guide pipe is arranged in the inner cavity, the top end of the guide pipe is fixedly connected with the top wall of the inner cavity, the guide pipe and the conical protective cover are coaxially arranged, the spring is arranged in the guide pipe, the top end of the sealing cap extends into the guide pipe through the bottom end of the guide pipe and abuts against the spring, and the bottom end of the sealing cap is exposed out of the bottom end of the guide pipe. The spring is used for driving the bottom end of the sealing cap to seal the opening. The counterweight is fixedly arranged at the top end of the conical protective cover. One end of the measuring rope is connected with one end of the counterweight far away from the conical protective cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building construction, in particular to a bored pile bottom sediment thickness measuring device. BACKGROUND

[0002] In the foundation construction stage, the bored pile is widely applied to various building engineering because of its mature construction technology, wide application area, relatively economical cost, and relatively easy equipment condition.

[0003] The pile bottom sediment thickness measurement is a necessary link in the bored pile construction of the foundation engineering, and the accuracy thereof will directly affect the determination of whether the pile hole state has reached the allowable value of the pourable underwater concrete, whether the underwater concrete pouring can be closely combined with the bedrock, and whether the pile bottom bearing capacity can meet the design calculation requirement.

[0004] In the above existing scheme, the weight method is the most common sediment thickness measurement method at present, and the measurement result of the sediment thickness is generally low in accuracy and large in deviation.

[0005] Therefore, a bored pile bottom sediment thickness measuring device is needed to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a bored pile bottom sediment thickness measuring device to ensure the accuracy of the bored pile bottom sediment thickness measurement.

[0007] In order to achieve the above purpose, the utility model provides a bored pile bottom sediment thickness measuring device, which comprises:

[0008] The conical protective cover is provided with an inner cavity, and the bottom end of the conical protective cover is provided with an opening communicating the inner cavity and the outer side of the conical protective cover;

[0009] The telescopic switch comprises a guide tube, a spring and a sealing cap, the guide tube is arranged in the inner cavity and is fixedly connected with the top wall of the inner cavity at the top end, the guide tube is coaxially arranged with the conical protective cover, the spring is arranged in the guide tube, the top end of the sealing cap extends into the guide tube through the bottom end of the guide tube and abuts against the spring, and the bottom end of the sealing cap is exposed at the bottom end of the guide tube; the spring is used to drive the bottom end of the sealing cap to close the opening;

[0010] A counterweight is fixedly arranged at the top end of the conical protective cover;

[0011] A measuring rope is connected at one end to the end of the counterweight away from the conical protective cover.

[0012] As an improvement of the above technical solution, the sealing cap comprises:

[0013] A guide rod is arranged coaxially with the guide tube and extends into the guide tube through the bottom end of the guide tube;

[0014] A sealing part is fixedly connected at the top end with the bottom end of the guide rod and is exposed at the bottom end of the guide tube, and the maximum cross-sectional dimension of the sealing part perpendicular to the axis of the guide rod is not less than the dimension of the opening.

[0015] As an improvement of the above technical solution, the guide tube is a circular tube, and the guide rod is a cylindrical rod.

[0016] As an improvement of the above technical solution, the cross section of the sealing part perpendicular to the axis of the guide rod is circular, and the opening is a circular opening.

[0017] As an improvement of the above technical solution, the maximum diameter of the cross section of the sealing part perpendicular to the axis of the guide rod is equal to the diameter of the opening.

[0018] As an improvement of the above technical solution, the telescopic switch further comprises a sealing guide plate, the sealing guide plate is arranged at the bottom end of the guide tube, a guide hole is arranged on the sealing guide plate and is coaxially arranged with the guide tube, and the top end of the guide rod is slidingly arranged in the guide hole.

[0019] As an improvement of the above technical solution, the telescopic switch further comprises an inner guide plate, the inner guide plate is slidingly arranged in the guide tube, the top end of the guide rod is fixedly connected with the inner guide plate, and the diameter of the inner guide plate is equal to the inner diameter of the guide tube.

[0020] As an improvement of the above technical solution, the counterweight comprises a plurality of steel bars, the bottom end of the steel bar is fixedly arranged at the top end of the conical protective cover, and the axis of the steel bar is parallel to the axis of the conical protective cover.

[0021] As the improvement of the above technical scheme, the steel bars are provided with three, and the distance between the central axes of the three steel bars is equal.

[0022] As the improvement of the above technical scheme, the steel bars are provided with three, and the distance between the central axes of the three steel bars is equal.

[0023] Compared with the prior art, the utility model has the beneficial effects that:

[0024] The drilling pile bottom sediment thickness measuring device is slowly lowered to the drilling pile hole bottom contact surface (namely the sediment top surface) through the measuring rope, the pile hole depth is measured according to the measuring rope, then the drilling pile bottom sediment thickness measuring device is shaken and lowered, the conical protective cover breaks into the pile bottom sediment, the break-in sediment extrudes the sealing cap of the telescopic switch, the sealing cap compresses the spring, the opening is opened, the break-in sediment enters the inner cavity of the conical protective cover through the opening, until the conical protective cover breaks into the bottom of the pile bottom sediment, the pile hole depth is measured according to the measuring rope, the first sediment thickness value of the pile hole is obtained by subtracting the sediment top surface depth from the hole bottom depth. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure schematic diagram of the drilling pile bottom sediment thickness measuring device provided by the utility model embodiment;

[0026] Figure 2 It is the local sectional view (only the conical protective cover and the telescopic switch part are cut) of the drilling pile bottom sediment thickness measuring device provided by the utility model embodiment;

[0027] Figure 3 It is the top view of part structure of the drilling pile bottom sediment thickness measuring device provided by the utility model embodiment;

[0028] Figure 4is a schematic view of the drilling bored pile bottom sediment thickness measuring device contacting the sediment top surface, provided by the embodiment of the utility model;

[0029] Figure 5 is a schematic view of the drilling bored pile bottom sediment thickness measuring device contacting the sediment bottom, provided by the embodiment of the utility model;

[0030] Figure 6 is a schematic view of the drilling bored pile bottom sediment thickness measuring device moving from the sediment bottom upward, provided by the embodiment of the utility model.

[0031] In the drawing:

[0032] 1, conical protective cover;11, inner cavity;12, opening;

[0033] 2, telescopic switch;21, guide pipe;22, spring;23, sealing cap;231, guide rod;232, sealing part;24, sealing guide plate;

[0034] 3, counterweight;31, reinforcing bar;

[0035] 4, measuring rope;

[0036] 5, handle;51, connecting rod;

[0037] 100, sediment top surface;200, sediment bottom. Specific embodiments

[0038] The specific embodiments of the utility model are described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0039] In the description of the utility model, unless explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrated;Can be mechanically connected, can be electrically connected;Can be directly connected, can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "upper surface of" second feature includes that first feature is directly above and obliquely above second feature, or only indicates that horizontal height of first feature is higher than second feature. First feature "under", "below" and "under surface of" second feature includes that first feature is directly below and obliquely below second feature, or only indicates that horizontal height of first feature is less than second feature.

[0041] In the description of the embodiment, the terms "upper", "lower", "right", and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0042] As Figures 1-6 The utility model discloses a bored pile bottom sediment thickness measuring device, including conical protective cover 1, telescopic switch 2, counterweight 3 and measuring rope 4. The conical protective cover 1 is gradually reduced from top end to bottom end section diameter, and the conical protective cover 1 is provided with inner chamber 11, and the bottom end of the conical protective cover 1 is provided with the opening 12 that communicates the inner chamber 11 with the outside of the conical protective cover 1. Telescopic switch 2 includes guide pipe 21, spring 22 and sealing cap 23, and the guide pipe 21 is arranged in the inner chamber 11, and the top end is fixedly connected with the top wall of the inner chamber 11, and the guide pipe 21 is coaxially arranged with the conical protective cover 1, and the spring 22 is arranged in the guide pipe 21, and the top end of the sealing cap 23 is inserted into the guide pipe 21 and abuts with the spring 22 through the bottom end of the guide pipe 21, and the bottom end is exposed to the bottom end of the guide pipe 21, and the spring 22 is used to drive the bottom end of the sealing cap 23 to close the opening 12. Counterweight 3 is fixedly arranged at the top end of the conical protective cover 1. One end of measuring rope 4 is connected with the end of counterweight 3 away from the conical protective cover 1.

[0043] The drilling pile bottom sediment thickness measuring device provided by the embodiment is slowly lowered to the bottom of the drilling pile hole through the measuring rope 4 to contact the top surface of the bottom sediment (i.e., the bottom sediment top surface 100) when the thickness of the bottom sediment of the drilling pile is measured, and the depth of the pile hole is measured by the measuring rope 4 at this time, which is the depth of the bottom sediment top surface 100. Then, the drilling pile bottom sediment thickness measuring device is shaken and lowered, the conical protective cover 1 breaks into the bottom sediment, the break-in sediment extrudes the sealing cap 23 of the telescopic switch 2, the sealing cap 23 compresses the spring 22, the opening 12 is opened, the break-in sediment enters the inner cavity 11 of the conical protective cover 1 through the opening 12, and the conical protective cover 1 breaks into the bottom of the bottom sediment. The depth of the pile hole is measured by the measuring rope 4 at this time, which is the depth of the bottom of the hole, and the first bottom sediment thickness value of the pile hole is obtained by subtracting the depth of the bottom sediment top surface 100 from the depth of the bottom of the hole. Then, the drilling pile bottom sediment thickness measuring device is uniformly raised and recovered through the measuring rope 4, the spring 22 drives the sealing cap 23 to reset and block the opening 12, the integrity of the sediment sample in the inner cavity 11 is ensured, the sediment sample in the inner cavity 11 is taken out after the drilling pile bottom sediment thickness measuring device is taken out of the pile hole, the volume of the sediment sample is measured, the second bottom sediment thickness value is calculated according to the volume of the sediment sample divided by the area of the opening 12, and the first bottom sediment thickness value is compared with the second bottom sediment thickness value. If the difference is within a certain range, it is considered that the first bottom sediment thickness value is accurate and available.

[0044] Optionally, as shown in Figure 2 , the sealing cap 23 comprises a guide rod 231 and a sealing part 232. The top end of the guide rod 231 extends into the guide tube 21 through the bottom end of the guide tube 21, and the guide rod 231 is coaxially arranged with the guide tube 21. The top end of the sealing part 232 is fixedly connected with the bottom end of the guide rod 231, the sealing part 232 is exposed at the bottom end of the guide tube 21, and the maximum cross-sectional dimension of the sealing part 232 perpendicular to the axis of the guide rod 231 is not less than the dimension of the opening 12. The sealing part 232 interacts with the spring 22 through the guide rod 231, when the guide rod 231 compresses the spring 22 upward, the spring 22 is contracted, the sealing part 232 moves upward, and the opening 12 is opened. When the guide rod 231 does not compress the spring 22, the sealing part 232 is located at the opening 12 to close the opening 12.

[0045] Further, as shown in Figure 1 and Figure 2 , the cross section of the sealing part 232 perpendicular to the axis of the guide rod 231 is circular, that is, the bottom surface of the sealing part 232 is a circular arc surface, and the opening 12 is a circular opening 12. The circular arc surface and the circular opening 12 cooperate to better close the opening 12. In the embodiment, the maximum cross-sectional dimension of the sealing part 232 perpendicular to the axis of the guide rod 231 is not less than the dimension of the opening 12, that is, the diameter of the maximum cross section of the sealing part 232 perpendicular to the axis of the guide rod 231 is not less than the diameter of the opening 12.

[0046] Further, as shown in Figure 1 and Figure 2 shown, the maximum diameter of the sealing portion 232 perpendicular to the cross section of the guide rod 231 axis is equal to the diameter of the opening 12. In the case of no external force on the sealing portion 232, the maximum diameter of the sealing portion 232 is just at the opening 12, at this time, the sealing portion 232 seals the opening 12. This arrangement can make the opening 12 open quickly when the sealing portion 232 contacts the hole bottom sediment, ensuring that the sediment enters the inner cavity 11 smoothly.

[0047] Further, as shown in Figure 2 shown, the retractable switch 2 further comprises a sealing guide plate 24, which is arranged at the bottom end of the guide pipe 21, and the sealing guide plate 24 is provided with a guide hole coaxially arranged with the guide pipe 21, and the top end of the guide rod 231 is slidingly inserted into the guide hole. The sealing guide plate 24 plays a guiding role for the guide rod 231, so that the guide rod 231 and the conical protective cover 1 remain coaxial.

[0048] Further, the retractable switch 2 further comprises an internal guide plate slidingly arranged in the guide pipe 21, and the top end of the guide rod 231 is fixedly connected with the internal guide plate, and the diameter of the internal guide plate is equal to the inner diameter of the guide pipe 21. The arrangement of the internal guide plate can make the guide rod 231 better compress the spring 22, so that the acting force between the guide rod 231 and the spring 22 is along the axial direction of the guide pipe 21.

[0049] Optionally, as shown in Figures 1-3 shown, the counterweight 3 comprises a plurality of steel bars 31, the bottom end of the steel bar 31 is fixed to the top end of the conical protective cover 1, and the axis of the steel bar 31 is parallel to the axis of the conical protective cover 1. The steel bar 31 is used to counterweight the bored pile bottom sediment thickness measuring device, and the steel bar 31 is easy to obtain and low in cost.

[0050] Further, as shown in Figure 3 shown, the steel bar 31 is provided with three, and the distance between the central axes of the three steel bars 31 is equal.

[0051] Optionally, as shown in Figures 1-3 shown, the bored pile bottom sediment thickness measuring device provided by the embodiment further comprises a handle 5, and the handle 5 is fixedly arranged at the end of the counterweight 3 away from the conical protective cover 1, and the measuring rope 4 is connected to the handle 5. By arranging the handle 5 at the top end of the counterweight 3, the connection between the measuring rope 4 and the counterweight 3 is facilitated.

[0052] Further, as shown in Figures 1-3As shown, the handle 5 includes a plurality of connecting rods 51, which are arranged one-to-one with the reinforcing bars 31, the bottom end of the connecting rod 51 is fixedly connected to the center of the top end face of the corresponding reinforcing bar 31, and the top ends of the connecting rods 51 are fixedly connected to each other. By arranging the connecting rods 51 corresponding to the reinforcing bars 31 to form the handle 5, and connecting the measuring rope 4 to the top end of the handle 5, the connection between the handle 5 and the measuring rope 4 can be located on the axis of the conical protective cover 1, so that the axis of the conical protective cover 1 can remain vertical when the drill hole cast-in-place pile bottom sediment thickness measuring device is lowered and recovered through the measuring rope 4.

[0053] In the embodiment, the handle 5 is in the shape of a triangular pyramid, the diameters of the three connecting rods 51 of the handle 5 are all 10 mm, the lengths of the three connecting rods 51 are all 25 mm, and the materials of the three connecting rods 51 are all steel. The diameter of a single reinforcing bar 31 in the counterweight 3 is 25 mm, the height of the single reinforcing bar 31 is 500 mm, and the material of the single reinforcing bar 31 is steel. The diameter of the top (large diameter end) of the conical protective cover 1 is 54 mm, the diameter of the bottom of the conical protective cover 1 is about 24 mm, the height of the conical protective cover 1 is 150 mm, the thickness of the cover wall of the conical protective cover 1 is 2 mm, the material of the conical protective cover 1 is aluminum alloy, and the bottom end is provided with an opening 12, and the diameter of the opening 12 is 20 mm. The diameter of the sealing portion 232 of the sealing cap 23 is 20 mm, the height of the sealing portion 232 is 10 mm, that is to say, the sealing portion 232 in the embodiment is in the shape of a hemisphere. The diameter of the guide rod 231 is 10 mm, the height of the guide rod 231 is 20 mm, the guide rod 231 is arranged in the center, and the material of the guide rod 231 is aluminum alloy. The width of the spring 22 is 15 mm, and the height of the spring 22 is 130 mm. The diameter of the measuring rope 4 is 5 mm, the length of the measuring rope 4 is 50 m, and the material of the measuring rope 4 is nylon steel wire. The diameter of the guide pipe 21 is 15 mm, the height of the guide pipe 21 is 130 mm, the guide pipe 21 is arranged in the center, and the material of the guide pipe 21 is aluminum alloy. First, the three reinforcing bars 31 in the counterweight 3 are welded to each other along the height direction to form a weight, then the handle 5 and the counterweight 3 are welded and fixed, then one end of the measuring rope 4 is wound around the top of the handle 5 for one turn and tied and knotted, so that the weight can be freely lifted up and down in the pile hole by means of the handle 5 and the measuring rope 4, and finally the pre-fabricated pile bottom sediment thickness breaking extractor composed of the conical protective cover 1 and the telescopic switch 2 is welded to the bottom of the weight to form a complete drill hole cast-in-place pile bottom sediment thickness measuring device.

[0054] The working process of the utility model is as follows:

[0055] As Figures 4-6As shown, when the pile bottom sediment thickness of the cast-in-situ bored pile is measured, the cast-in-situ bored pile pile bottom sediment thickness measuring device is slowly lowered to the pile hole bottom contact surface through the measuring rope 4, the pile hole depth is measured as the sediment top surface 100 depth H1 at this time according to the measuring rope 4, then the cast-in-situ bored pile pile bottom sediment thickness measuring device is shaken and lowered, the conical protective cover 1 breaks into the pile bottom sediment, the break-in sediment extrudes the sealing cap 23 of the telescopic switch 2, the sealing cap 23 compresses the spring 22, the opening 12 is opened, the break-in sediment enters the inner cavity 11 of the conical protective cover 1 through the opening 12, until the conical protective cover 1 breaks into the pile bottom sediment bottom 200, the pile hole depth is measured as the hole bottom depth H2 at this time according to the measuring rope 4, and the first sediment thickness value of the pile hole is preliminarily obtained as H2-H1. Then the cast-in-situ bored pile pile bottom sediment thickness measuring device is uniformly lifted and recovered through the measuring rope 4, the spring 22 drives the sealing cap 23 to reset and block the opening 12, the integrity of the sediment sampling in the inner cavity 11 is ensured, after the cast-in-situ bored pile pile bottom sediment thickness measuring device is lifted out of the pile hole, the telescopic switch 2 is centered and aligned with the plastic measuring cylinder with a specification of 25ml, a bottle opening inner diameter of 20mm and a height of 160mm, a piece of cross-shaped filter screen is placed at the measuring cylinder opening, the filter screen is used to abut against the sealing portion 232 to make the telescopic switch 2 shrink into the conical protective cover 1 under stress, and the sediment in the inner cavity 11 can flow into the measuring cylinder freely. The volume of the extracted pile bottom sediment is measured as V, according to the cylinder volume formula V=πR 2 h, V and R are known, the second sediment thickness value h of the pile hole can be calculated, the first sediment thickness value H2-H1 measured by the measuring rope 4 is compared, whether the first sediment thickness value H2-H1 is accurate can be verified. Finally, after being cleaned, the cast-in-situ bored pile pile bottom sediment thickness measuring device can be used repeatedly.

[0056] The preferred embodiments of the present application are described above, it should be noted that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A device for measuring the thickness of the pile bottom sediment of a cast-in-place bored pile, characterized by, The utility model provides a telescopic switch and a telescopic protective cover, and the telescopic switch is arranged in the telescopic protective cover. The telescopic switch comprises a guide pipe, a spring and a sealing cap. The guide pipe is arranged in the inner cavity of the telescopic protective cover and is fixedly connected to the top wall of the inner cavity. The spring is arranged in the guide pipe. The sealing cap is arranged in the guide pipe and is in abutment with the spring.

2. The bored pile bottom sediment thickness measuring device according to claim 1, characterized by, The telescopic protective cover comprises a conical protective cover and a counterweight. The conical protective cover is provided with an inner cavity. The bottom end of the sealing cap is exposed outside the bottom end of the guide pipe.

3. The bored pile bottom sediment thickness measuring device according to claim 2, characterized by, The sealing cap comprises a guide rod and a sealing part.

4. The bored pile bottom sediment thickness measuring device according to claim 2, characterized by, The guide rod is coaxially arranged in the guide pipe.

5. The bored pile bottom sediment thickness measuring device according to claim 4, wherein The sealing part is fixedly connected to the bottom end of the guide rod.

6. The bored pile bottom sediment thickness measuring device according to claim 2, wherein The maximum cross-sectional dimension of the sealing part perpendicular to the axis of the guide rod is not less than the size of the opening.

7. The bored pile bottom sediment thickness measuring device according to claim 6, characterized by, The guide pipe is a circular pipe.

8. The bored pile bottom sediment thickness measuring device according to claim 1, wherein The guide rod is a cylindrical rod. The cross-section of the sealing part perpendicular to the axis of the guide rod is circular. The maximum diameter of the cross-section of the sealing part perpendicular to the axis of the guide rod is equal to the diameter of the opening. The telescopic switch further comprises a sealing guide plate. The sealing guide plate is arranged on the bottom end of the guide pipe. The sealing guide plate is provided with a guide hole. The guide hole is coaxially arranged in the guide pipe. The top end of the guide rod is slidably arranged in the guide hole. The telescopic switch further comprises an inner guide plate. The inner guide plate is slidably arranged in the guide pipe. The top end of the guide rod is fixedly connected to the inner guide plate. The diameter of the inner guide plate is equal to the inner diameter of the guide pipe. The counterweight comprises a plurality of steel bars. The bottom end of the steel bar is fixed to the top end of the conical protective cover. The axis of the steel bar is parallel to the axis of the conical protective cover.

9. The bored pile bottom sediment thickness measuring device according to claim 8, characterized by, The steel bars (31) are provided with three, the distance between the central axes of the three steel bars (31) is equal.

10. The bored pile bottom sediment thickness measuring device according to claim 9, wherein Further comprising a handle (5), the handle (5) is fixedly arranged on the end of the counterweight (3) away from the conical protective cover (1), and the measuring rope (4) is connected to the handle (5).

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