CN216238529U

CN216238529U - Cast-in-situ bored pile concreting surface detection device

Info

Publication number: CN216238529U
Application number: CN202122338897.7U
Authority: CN
Inventors: 韩辉; 冯金; 沈道旭; 吴万林; 刘灯明; 钟浪
Original assignee: China Tiesiju Civil Engineering Group Co Ltd CTCE Group; Fifth Engineering Co Ltd of CTCE Group
Current assignee: China Tiesiju Civil Engineering Group Co Ltd CTCE Group; Fifth Engineering Co Ltd of CTCE Group
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-04-08
Anticipated expiration: 2031-09-26

Abstract

The utility model discloses a cast-in-situ bored pile cast concrete surface detection device which comprises a concrete storage hopper, wherein the bottom of the concrete storage hopper is connected with a guide pipe, the guide pipe is formed by assembling a plurality of guide pipe units, the top and the bottom of the outer side wall of the concrete storage hopper and each guide pipe unit are respectively provided with a limiting ring, a steel wire rope penetrates through the limiting rings, and the steel wire rope positioned at the guide pipe part is in a vertical state; an inner pile weight A and an outer pile weight B are respectively fixed at the bottom and the top of the steel wire rope, and the mass of the inner pile weight A is greater than that of the outer pile weight B; the pile inner weight A is positioned at the bottom of the guide pipe, and the pile outer weight B is positioned at the top of the concrete storage hopper. According to the utility model, through the design of the pile inner weight A, the steel wire rope and the pile outer weight B, the change value of the height of the concrete surface in the pile hole can be converted into the change value of the height of the pile outer weight B, so that the information of the height change of the concrete surface in the pile hole can be obtained in real time by directly observing the position of the pile outer weight B, and the method has the advantages of simple principle and convenience in construction.

Description

Cast-in-situ bored pile concreting surface detection device

Technical Field

The utility model belongs to the technical field of cast-in-situ bored pile construction devices, and particularly relates to a cast-in-situ bored pile concrete surface detection device.

Background

The cast-in-situ bored pile is a pile formed by forming a pile hole in foundation soil through mechanical drilling, steel pipe soil extrusion or manual excavation and the like on an engineering site, placing a reinforcement cage in the pile hole and pouring concrete into the pile hole. The cast-in-situ bored pile is widely applied to the fields of highway and railway bridge foundations, aviation docks, high-rise tower foundations and the like at present as a foundation reinforcing measure, and obtains a very good engineering application effect, wherein the pouring of concrete is used as an important process of the cast-in-situ bored pile, and the construction quality of the cast-in-situ bored pile directly influences the pile forming quality of the cast-in-situ bored pile. The quality of broken piles and piles with impurities is a quality defect of common cast-in-situ bored piles, and the main reason is that the bottom surface of a guide pipe is lifted out of the top surface of concrete in the concrete pouring process, so that other impurities such as mud and sand enter the concrete in a pile hole, and the broken piles and the piles with impurities are caused, so that engineering quality accidents are caused.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a cast-in-situ bored pile concrete surface detection device which can detect the concrete surface in a pile hole in real time when the cast-in-situ bored pile pours concrete and can effectively prevent the bottom of a guide pipe from being lifted out of the concrete surface when the guide pipe is lifted, thereby ensuring the engineering quality problem of the cast-in-situ bored pile.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a cast-in-situ bored pile cast concrete surface detection device comprises a concrete storage hopper, wherein the bottom of the concrete storage hopper is connected with a guide pipe, and the guide pipe is formed by assembling a plurality of guide pipe units; limiting rings are arranged at the top and the bottom of the outer side wall of the concrete storage hopper and at the ribbed position of each guide pipe unit, steel wire ropes capable of freely sliding penetrate through the limiting rings, and the steel wire ropes positioned on the guide pipe parts are in a vertical state; an inner pile weight A is fixed at the bottom of the steel wire rope, an outer pile weight B is fixed at the top of the steel wire rope, and the mass of the inner pile weight A is greater than that of the outer pile weight B; the pile inner weight A is positioned at the bottom of the guide pipe, and the pile outer weight B is positioned at the top of the concrete storage hopper. In the work progress, pack into the concrete in the concrete storage hopper from the concrete, the concrete gets into the stake hole from the pipe bottom, in the downthehole concrete face height of stake rise gradually the in-process, because heavy object A receives the buoyancy of concrete to it in the stake, heavy object A can rise gradually along with the increase of concrete face height in the stake, the height of heavy object B outside the stake can reduce simultaneously, the change value of heavy object B height outside the stake this moment is the increase value of downthehole concrete face height of stake promptly, can know the information of the downthehole concrete face height change of stake promptly through observing the altitude variation of heavy object B outside the stake. In addition, in concrete pouring process, in order to prevent the occurrence of pile breakage, the bottom of the guide pipe needs to be located in the concrete face at a certain depth all the time (the general depth is 2-6m), the depth is the distance between the weight A in the pile and the bottom of the guide pipe, and meanwhile, the depth is the distance between the weight B outside the pile and the limiting ring at the top of the concrete storage hopper, so that in the pouring and guide pipe lifting process, as long as the weight B outside the pile is not in contact with the limiting ring at the top of the concrete storage hopper, the bottom of the guide pipe can be guaranteed to be located in the concrete face all the time, the concrete face at the bottom of the guide pipe can be effectively prevented from being lifted, and the engineering quality of the cast-in-situ bored pile is guaranteed.

According to the preferable technical scheme, the steel wire rope is formed by connecting a plurality of steel wire rope units end to end, the length of each steel wire rope unit is equal to that of each conduit unit, and two adjacent steel wire rope units are connected through a connecting bolt. In the pouring process, when a section of conduit unit needs to be removed along with the increase of the height of the concrete surface in the pile hole, one steel wire rope unit is correspondingly removed.

As a preferred technical scheme, the connecting bolt comprises a cylindrical body, two ends of the cylindrical body are respectively connected with a conical connecting part, and the conical connecting part is provided with a connecting hole for the steel wire rope to penetrate through; the conical connecting part is connected with the cylindrical body through threads. The method for connecting two adjacent steel wire rope units through the connecting bolt comprises the following steps: one end of one steel wire rope unit penetrates into a connecting hole of one conical connecting part and ties the end part of the steel wire rope unit positioned in the connecting hole, one end of the other steel wire rope unit penetrates into a connecting hole of the other conical connecting part and ties the end part of the steel wire rope unit positioned in the connecting hole, and finally the two conical connecting parts are respectively connected with the two ends of the cylindrical body, so that the two steel wire rope units can be connected into a whole. Further preferably, the cast-in-situ bored pile cast concrete surface detection device further comprises a positioning pin, and a positioning hole for inserting the positioning pin is formed in the middle of the cylindrical body along the radial direction of the cylindrical body. In the work progress, when a wire rope unit needs to be dismantled, through inserting the locating pin in the locating hole, can be convenient for carry on spacingly to the cylindricality body to conveniently carry out the work of dismantling of wire rope unit.

As the preferred technical scheme, the concrete storage hopper comprises a cylindrical part and a conical part, a limiting ring is also fixed at the junction of the cylindrical part and the conical part, and the limiting ring positioned at the top and the bottom of the outer side wall of the concrete storage hopper are positioned on the same straight line.

According to a preferable technical scheme, the weight A in the pile is an iron gyroscope, and the longitudinal section of the weight A in the pile is a trapezoid with a small upper part and a large lower part. The design of the shape can enable the bottom surface of the weight A in the pile to have a larger surface area, so that the contact area between the weight A and a concrete surface is increased, the buoyancy of the concrete surface facing the weight A is increased, and the sensitivity of the detection of a delayed coagulation soil surface is improved. Further preferably, the outer surface of the weight A in the pile is coated with a polytetrafluoroethylene isolation layer. The polytetrafluoroethylene has good hydrophobicity, and the outer surface of the weight A in the pile is coated with the polytetrafluoroethylene isolating layer, so that the weight A in the pile can be prevented from being adhered to the concrete surface, and the weight A in the pile can be ensured to float on the surface layer of the concrete surface all the time.

The utility model has the beneficial effects that:

according to the cast-in-situ bored pile concrete surface detection device provided by the utility model, through the design of the pile inner weight A, the steel wire rope and the pile outer weight B, the change value of the height of the concrete surface in the pile hole can be converted into the height change value of the pile outer weight B, so that the information of the height change of the concrete surface in the pile hole can be obtained in real time by directly observing the position of the pile outer weight B, and the device is simple in principle and convenient to construct. Simultaneously when promoting the pipe, can prevent effectively that the pipe bottom from being carried out the concrete face to guarantee the engineering quality problem of bored concrete pile, compare in the artifical method that utilizes steel wire measuring rope direct measurement stake downthehole concrete face of tradition and have obvious advantage.

Drawings

Fig. 1 is a schematic structural diagram of a cast-in-situ bored pile cast concrete surface detection device provided by the present invention;

FIG. 2 is an enlarged view of portion D of FIG. 1;

FIG. 3 is a schematic diagram of an exploded structure of a connecting bolt;

FIG. 4 is a top view of a conical connection;

FIG. 5 is a schematic view showing the engagement between the connection bolt and the positioning pin;

fig. 6 is a schematic view of the use state of the cast-in-situ bored pile cast concrete surface detection device provided by the present invention at different stages of concrete casting.

Reference numerals: 1-concrete storage hopper, 101-cylindrical part, 102-conical part, 2-guide pipe, 3-limiting ring, 4-steel wire rope, 5-pile internal weight A, 6-pile external weight B, 7-connecting bolt, 701-cylindrical body, 702-conical connecting part, 703-connecting hole, 704-positioning hole and 8-positioning pin.

Detailed Description

The utility model is further described with reference to the following figures and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "fixed" are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally 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.

It is to be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in the appended drawings to indicate orientations and positional relationships, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting.

Referring to fig. 1 and 2, the cast-in-situ bored pile cast concrete surface detection device comprises a concrete storage hopper 1, wherein a guide pipe 2 is connected to the bottom of the concrete storage hopper 1, and the guide pipe 2 is formed by assembling a plurality of guide pipe units; limiting rings 3 are arranged at the top and the bottom of the outer side wall of the concrete storage hopper 1 and at the ribbed position of each guide pipe unit, steel wire ropes 4 capable of freely sliding penetrate through the limiting rings 3, and the steel wire ropes at the guide pipe part are in a vertical state; preferably, the concrete storage hopper 1 comprises a cylindrical part 101 and a conical part 102, and a limit ring is also fixed at the junction of the cylindrical part and the conical part, and is positioned on the same straight line with the limit rings positioned at the top and the bottom of the outer side wall of the concrete storage hopper 1. An inner pile weight A5 is fixed at the bottom of the steel wire rope 4, an outer pile weight B6 is fixed at the top of the steel wire rope, and the mass of the inner pile weight A5 is larger than that of the outer pile weight B6; pile inner weight a5 is located at the bottom of guide tube 2 and pile outer weight B6 is located at the top of concrete storage hopper 1. Further, the weight A5 in the pile is an iron gyroscope, and the longitudinal section of the weight A5 in the pile is a trapezoid with a small upper part and a big lower part; in order to prevent the weight A in the pile from being stuck with the concrete surface, the outer surface of the weight A5 in the pile is coated with a polytetrafluoroethylene isolation layer.

As a preferred embodiment, the steel wire rope 4 is formed by connecting a plurality of steel wire rope units end to end, the length of each steel wire rope unit is equal to the length of each conduit unit, two adjacent steel wire rope units are connected through a connecting bolt 7, and in the pouring process, when a section of conduit unit needs to be removed along with the increase of the height of a concrete surface in a pile hole, one steel wire rope unit is correspondingly removed. Referring to fig. 3 to 5, the connection bolt 7 includes a cylindrical body 701, conical connection portions 702 are respectively connected to both ends of the cylindrical body 701, and the conical connection portions 702 have connection holes 703 through which the wire rope passes; the conical connection 702 is screwed to the cylindrical body 701; the cast-in-situ bored pile concrete surface detection device further comprises a positioning pin 8, and a positioning hole 704 for inserting the positioning pin 8 is formed in the middle of the cylindrical body 701 in the radial direction of the cylindrical body. In the construction process, when a steel wire rope unit needs to be detached, the positioning pin 8 is inserted into the positioning hole 704, so that the cylindrical body 701 can be conveniently limited, and the detachment work of the steel wire rope unit is conveniently carried out.

Referring to fig. 6, the assembly of the detection device and the application thereof in the concrete pouring construction of the cast-in-situ bored pile provided by the utility model comprise the following construction steps:

a. after the cast-in-place bored pile reinforcement cage is lowered, limiting rings are welded at the ribbed position of each conduit unit and the lower part, the middle part and the top part of the concrete storage hopper.

b. When the first section of conduit unit is ready to be hoisted and lowered, one end of one steel wire rope unit is used for fastening a weight A in the pile, the other end of the steel wire rope unit penetrates through a limiting ring on the conduit unit, and the length of each steel wire rope unit is the length of one section of conduit unit.

c. When the second section of conduit unit is ready to be hoisted and lowered, one end of the first steel wire rope unit is connected with one end of the second steel wire rope unit by using a connecting bolt;

d. when the rest pipe units are lowered, sequentially installing a connecting bolt and a steel wire rope unit according to the step c until the assembly of the pipes is completed, and then installing a concrete storage hopper at the top of the last pipe unit;

e. after the concrete storage hopper is installed, taking a steel wire rope unit, fastening a pile outer weight B at one end of the steel wire rope unit, penetrating the other end of the steel wire rope unit through a limiting ring on the concrete storage hopper, and connecting the steel wire rope unit with a steel wire rope below the storage hopper through a connecting bolt;

f. in the concrete pouring process, the guide pipe is lifted slowly, so that a certain distance is ensured between the weight B outside the pile and the limiting ring at the top of the concrete storage hopper, and the distance is the depth below the concrete surface where the bottom of the guide pipe is located

g. After lifting the guide pipe at every turn, see whether the outer heavy object B of stake highly descends to some extent, if do not have to descend or descend unobvious, can adopt external force to pull down and pull the outer heavy object B certain distance of stake after, loosen the hand again, guarantee that heavy object A is located stake downthehole concrete surface department this moment in the stake.

h. And g, repeating the step g, when a certain amount of concrete is poured in the pile hole, removing a section of guide pipe unit, firstly penetrating a positioning hole in the first connecting bolt by using a positioning pin, then unscrewing the conical connecting part at the upper part of the connecting bolt, and then removing and moving the concrete storage hopper. And continuously lifting the top guide pipe, penetrating a positioning pin into a positioning hole in a second connecting bolt, unscrewing a conical screw at the upper part of the connecting bolt, lifting and removing the first section of guide pipe unit, and dismantling a steel wire rope unit.

i. And (4) after the concrete storage hopper is hoisted in place, screwing the conical connecting part at the upper part of the first connecting bolt and the cylindrical body of the second connecting bolt, pulling out the positioning pin, and repeating the step h until the concrete surface in the pile hole reaches the designed elevation position.

The device has a simple principle, is convenient to construct, can detect the concrete surface in the pile hole in real time when the cast-in-situ bored pile pours concrete, and can effectively prevent the bottom of the guide pipe from being lifted out of the concrete surface when the guide pipe is lifted, thereby ensuring the engineering quality problem of the cast-in-situ bored pile.

Claims

1. A cast-in-situ bored pile cast concrete surface detection device comprises a concrete storage hopper, wherein the bottom of the concrete storage hopper is connected with a guide pipe, and the guide pipe is formed by assembling a plurality of guide pipe units; the method is characterized in that: limiting rings are arranged at the top and the bottom of the outer side wall of the concrete storage hopper and at the ribbed position of each guide pipe unit, steel wire ropes capable of freely sliding penetrate through the limiting rings, and the steel wire ropes positioned on the guide pipe parts are in a vertical state; an inner pile weight A is fixed at the bottom of the steel wire rope, an outer pile weight B is fixed at the top of the steel wire rope, and the mass of the inner pile weight A is greater than that of the outer pile weight B; the pile inner weight A is positioned at the bottom of the guide pipe, and the pile outer weight B is positioned at the top of the concrete storage hopper.

2. The cast-in-situ bored pile cast concrete surface detection device according to claim 1, wherein: the steel wire rope is formed by connecting a plurality of steel wire rope units end to end, the length of each steel wire rope unit is equal to that of each conduit unit, and two adjacent steel wire rope units are connected through a connecting bolt.

3. The cast-in-situ bored pile cast concrete surface detection device according to claim 2, wherein: the connecting bolt comprises a cylindrical body, two ends of the cylindrical body are respectively connected with a conical connecting part, and the conical connecting part is provided with a connecting hole for the steel wire rope to penetrate through; the conical connecting part is connected with the cylindrical body through threads.

4. The cast-in-situ bored pile cast concrete surface detection device according to claim 3, wherein: the cast-in-situ bored pile concrete surface detection device further comprises a positioning pin, and a positioning hole for inserting the positioning pin is formed in the middle of the cylindrical body in the radial direction of the cylindrical body.

5. The cast-in-situ bored pile cast concrete surface detection device according to any one of claims 1 to 4, wherein: the concrete storage hopper includes cylindricality portion and toper portion, the juncture of cylindricality portion and toper portion also is fixed with the spacing ring, and this spacing ring is located same straight line with the spacing ring that is located the lateral wall top and the bottom of concrete storage hopper.

6. The cast-in-situ bored pile cast concrete surface detection device according to claim 1, wherein: the pile inner weight A is an iron gyroscope, and the longitudinal section of the pile inner weight A is a trapezoid with a small upper part and a large lower part.

7. The cast-in-situ bored pile cast concrete surface detection device according to claim 6, wherein: and a polytetrafluoroethylene isolation layer is coated on the outer surface of the weight A in the pile.