阅读说明：本技术 一种泥浆护壁钻孔灌注桩桩顶标高检测装置及检测方法 (Pile top elevation detection device and detection method for slurry retaining wall cast-in-situ bored pile ) 是由 史秀田 牛丰臣 王冬生 于 2019-10-23 设计创作，主要内容包括：本发明提供一种泥浆护壁钻孔灌注桩桩顶标高检测装置,包括若干个检测球、罐体、锁定装置、若干根横杆,所述罐体内部设置有所述检测球,所述检测球之间均球面相切；所述罐体设置于桩笼吊筋上；所述锁定装置设置于所述罐体内侧的中上部；所述横杆并排固定于所述罐体底部。本发明还提出一种泥浆护壁钻孔灌注桩桩顶标高检测装置的检测方法。本发明为可拆卸式自制构件,可提前制作在施工现场固定安装,结构简单易操作、加工成本低；适用于复杂多变的施工现场,灵活性高；两次提示停止混凝土灌注,桩顶标高的检测结果可靠性高,提高生产效率,保证施工进度和质量。(The invention provides a pile top elevation detection device for a slurry retaining wall cast-in-situ bored pile, which comprises a plurality of detection balls, a tank body, a locking device and a plurality of cross rods, wherein the detection balls are arranged in the tank body, and the detection balls are tangent to each other in spherical surface; the tank body is arranged on the pile cage hanging rib; the locking device is arranged at the middle upper part of the inner side of the tank body; the cross rods are fixed at the bottom of the tank body side by side. The invention further provides a detection method of the pile top elevation detection device of the slurry retaining wall cast-in-situ bored pile. The self-made detachable component can be manufactured in advance and fixedly mounted on a construction site, and is simple in structure, easy to operate and low in processing cost; the method is suitable for complex and changeable construction sites, and has high flexibility; and concrete pouring is stopped by prompting twice, the reliability of the detection result of the elevation of the pile top is high, the production efficiency is improved, and the construction progress and quality are ensured.)

1. The utility model provides a mud dado drilling bored concrete pile top elevation detection device, includes:

a plurality of detection balls (6);

the detection balls (6) are arranged in the tank body (7), and the spherical surfaces of the detection balls (6) are tangent; the tank body (7) is arranged on the pile cage hoisting rib (1), and the bottom of the tank body (7) is positioned at a designed virtual pile top height position;

the locking device is arranged at the middle upper part of the inner side of the tank body (7);

a plurality of horizontal poles (8), horizontal pole (8) are fixed in side by side jar body (7) bottom.

2. The pile top elevation detection device for the slurry retaining wall bored pile according to claim 1, characterized in that:

the locking device comprises a locking rod hinge (2), a locking rod (3), a tension spring (4) and a tension spring hinge (5), the locking rod hinge (2) is fixed on the top end of the tank body (7), one end of the locking rod (3) is connected with the tank body (7) through the locking rod hinge (2) in a hinged mode, and the other end of the locking rod (3) is a free end; extension spring hinge (5) are fixed in the inboard well upper portion of jar body (7), extension spring hinge (5) with extension spring (4) one end hinged joint, extension spring (4) other end is fixed in on locking lever (3).

3. The pile top elevation detection device for the slurry retaining wall bored pile according to claim 2, characterized in that:

an alarm device is arranged on the lock rod (3).

4. The pile top elevation detection device for the slurry retaining wall bored pile according to claim 1, characterized in that:

the tank body (7) is cylindrical, and the inner diameter of the tank body (7) is larger than that of the detection ball (6) and smaller than twice that of the detection ball (6).

5. The pile top elevation detection device for the slurry retaining wall bored pile according to claim 1, characterized in that:

the distance between the cross rods (8) is larger than the diameter of the cross rods (8) and smaller than the diameter of the detection ball (6).

6. The pile top elevation detection device for the slurry retaining wall bored pile according to claim 1, characterized in that:

the cross bars (8) are arranged in a grid shape.

7. The pile top elevation detection device for the slurry retaining wall bored pile according to claim 1, characterized in that:

the detection ball (6) is a light hollow ball.

8. A method for detecting a pile top elevation detection device of a slurry retaining wall cast-in-situ bored pile, which is characterized in that the detection device according to any one of claims 1 to 7 is adopted, and the method comprises the following steps:

s1: the locking device is installed, the locking rod hinge (2) is fixed to the top end of the tank body (7), one end of the locking rod (3) is connected with the tank body (7) through the locking rod hinge (2) in a hinged mode, and the other end of the locking rod (3) is a free end; the tension spring hinge (5) is fixed at the middle upper part of the inner side of the tank body (7), one end of the tension spring (4) is hinged with the tension spring hinge (5), and the other end of the tension spring (4) is fixed on the lock rod (3);

s2: the cross rods (8) are fixed at the bottom of the tank body (7) side by side, the detection ball (6) is placed in the tank body (1), and the tension spring (4) is in a natural state;

s3: placing the tank body (7) on the pile cage lifting rib (1), wherein the bottom of the tank body (7) is located at a designed virtual pile top height position, adjusting the relative position of the tank body (7) and the pile cage lifting rib (1), fixing the tank body and the pile cage lifting rib, and lowering the tank body and the pile body reinforcing cage to the designed virtual pile top height position;

s4: after hole cleaning is finished, concrete is poured; when concrete is poured to the designed virtual pile jacking position, the concrete enters the tank body (7) through the cross rod (8), the detection ball (6) rises under the action of concrete pressure, and the lock rod (3) is jacked to trigger the alarm device; the detection balls (6) are extruded from the tank body (7) and float upwards to the surface of slurry in the pile hole under the buoyancy action of the slurry in the pile hole;

s5: and (5) finishing pouring concrete and continuing subsequent construction.

Technical Field

The invention belongs to the field of constructional engineering, and particularly relates to a pile top elevation detection device and a detection method for a slurry retaining wall cast-in-situ bored pile.

Background

The key point of the construction method is the control of the elevation of the top surface of the concrete in the whole process of pouring the concrete of the slurry retaining wall cast-in-place pile. The poured concrete is too low or too high in height, secondary construction is needed, the construction difficulty is high, manpower is wasted, pile forming quality is not easy to guarantee, too much over-poured concrete is conveyed out of the bottom of the pile after being crushed, and accordingly consumption of manpower and mechanical equipment for picking and chiseling the pile head is increased, and concrete materials are wasted.

At present, the traditional technology and method for controlling the pouring height of pile body concrete generally adopt manual repeated detection and estimation to judge whether the pouring height is close to the top height of the pile body, such as a measuring rope with a measuring hammer and a long measuring rod with an enlarged head, which touch and detect into a pile hole. The manual detection needs to be stopped frequently at the later stage of pouring for measurement, and when the pile diameter is large, the density change of the mixture needs to be judged by operators according to experience because of manual operation of a probe rod or a measuring rope, and the field condition is too complex, so that the accuracy of measurement is not high. In order to prevent the insufficient concrete pouring, the concrete can still be over-poured in the later period according to the measured value, and the concrete material is wasted.

Or, the differential pressure sensor or the signal detector which utilizes the electric signal to transmit information is not beneficial to the construction of pile groups and large-diameter piles because the measuring range of the detector is fixed and the application range is small; and requires a specially-assigned person to operate, resulting in high labor and cost.

Disclosure of Invention

The invention aims to provide a pile top elevation detection device and a detection method for a slurry retaining wall cast-in-situ bored pile, which are suitable for the construction of a cast-in-situ pile with a longer virtual pile, in particular to the construction of a slurry retaining wall cast-in-situ bored pile with the diameter not less than 600 mm.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a mud dado drilling bored concrete pile top elevation detection device, includes:

a plurality of detection balls;

the detection balls are arranged in the tank body, and the detection balls are tangent to each other in spherical surface; the tank body is arranged on the pile cage hanging rib;

the locking device is arranged at the middle upper part of the inner side of the tank body;

the cross rods are fixed at the bottom of the tank body side by side.

Furthermore, the locking device comprises a locking rod hinge, a locking rod, a tension spring and a tension spring hinge, the locking rod hinge is fixed on the top end of the tank body, one end of the locking rod is connected with the tank body through the locking rod hinge, and the other end of the locking rod is a free end; the extension spring hinge is fixed on the middle upper part of the inner side of the tank body, the extension spring hinge is connected with one end of the extension spring through a hinge, and the other end of the extension spring is fixed on the lock rod.

Further, an alarm device is arranged on the lock rod.

Further, the tank body is cylindrical, and the inner diameter of the tank body is larger than the diameter of the detection ball and smaller than twice the diameter of the detection ball.

Further, the distance between the cross rods is larger than the diameter of the cross rods and smaller than the diameter of the detection ball.

Further, the cross bars are arranged in a grid pattern.

Furthermore, the detection ball is a light hollow ball.

The detection method of the pile top elevation detection device for the slurry retaining wall cast-in-situ bored pile adopts the detection device, and comprises the following steps:

s1: the locking device is installed, the locking rod is fixed on the top end of the tank body through a hinge, one end of the locking rod is connected with the tank body through the hinge of the locking rod, and the other end of the locking rod is a free end; the tension spring hinge is fixed at the middle upper part of the inner side of the tank body, one end of the tension spring is connected with the tension spring hinge, and the other end of the tension spring is fixed on the lock rod;

s2: fixing the cross rods at the bottom of the tank body side by side, placing the detection ball in the tank body, and keeping the tension spring in a natural state;

s3: placing the tank body on the pile cage hoisting rib, wherein the bottom of the tank body is located at a designed virtual pile top height position, adjusting the tank body to be arranged at a relative position with the pile cage hoisting rib, fixing the tank body, and lowering the tank body to the designed virtual pile top height position along with the pile body steel reinforcement cage;

s4: after hole cleaning is finished, concrete is poured; when concrete is poured to the top high position of the designed virtual pile, the concrete enters the tank body through the cross rod, the detection ball rises under the action of concrete pressure, and the lock rod is jacked to trigger the alarm device; the detection balls are extruded from the tank body and float upwards to the surface of slurry in the pile hole under the buoyancy action of the slurry in the pile hole;

s5: and (5) finishing pouring concrete and continuing subsequent construction.

By adopting the technical scheme, the detection device is arranged on the pile cage hanging rib, and the bottom of the detection device is positioned at the designed virtual pile top height position. When concrete is poured to the designed virtual pile top high position, a detection ball in the detection device rises under the action of concrete pressure, and triggers an alarm device to prompt for the first time that the concrete pouring is stopped; and the detection balls are extruded from the tank body, float up to the surface of the slurry in the pile hole under the buoyancy action of the slurry in the pile hole, and prompt for stopping concrete pouring for the second time. The self-made detachable component can be manufactured in advance and fixedly mounted on a construction site, and is simple in structure, simple and convenient to operate and low in processing cost; the system can be used in cooperation with complex and changeable construction sites, and is wide in application range and high in flexibility; the concrete pouring is stopped by two times of prompting, the result of detecting the top elevation of the concrete pile is high in reliability, the production efficiency is improved, and the construction progress and quality are guaranteed.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention

FIG. 2 is a schematic diagram of an embodiment of the present invention

In the figure:

1. pile cage hanging bar 2, lock rod hinge 3 and lock rod

4. Tension spring 5, tension spring hinge 6 and detection ball

7. Tank 8 and cross bar

Detailed Description

The invention is further illustrated by the following examples and figures:

in an embodiment of the invention, as shown in fig. 1, the pile top elevation detection device for the slurry retaining wall cast-in-situ bored pile comprises a plurality of detection balls 6, a tank body 7, a locking device and a plurality of cross rods 8, wherein the detection balls 6 are arranged inside the tank body 7, and the detection balls 6 are all tangent in spherical surface; the locking device is arranged at the middle upper part of the inner side of the tank body 7; the tank body 7 is arranged on the pile cage hanging rib 1, and the bottom of the tank body 7 is positioned at the designed virtual pile top height position; preferably, the cross bars 8 are fixed side by side to the bottom of the tank 7.

More preferably, the cross bars 8 are arranged in a grid.

The locking device comprises a locking rod hinge 2, a locking rod 3, a tension spring 4 and a tension spring hinge 5, wherein the locking rod hinge 2 is fixed on the top end of the tank body 7, one end of the locking rod 3 is connected with the tank body 7 through the locking rod hinge 2, and the other end of the locking rod 3 is a free end; the tension spring hinge 5 is fixed on the middle upper part of the inner side of the tank body 7, the tension spring hinge 5 is hinged with one end of the tension spring 4, and the other end of the tension spring 4 is fixed on the lock rod 3.

Preferably, the locking bar 3 is provided with an alarm device.

Preferably, the can 7 is cylindrical, and the inner diameter of the can 7 is larger than the diameter of the detection ball 6 and smaller than twice the diameter of the detection ball 6.

Preferably, the distance between the cross bars 8 is larger than the diameter of the cross bars 8 and smaller than the diameter of the detection ball 6.

As shown in fig. 2, when concrete is poured to the designed virtual pile jacking position, the concrete enters the tank body 7, the detection ball 6 rises under the action of concrete pressure, the lock rod 3 is jacked open, the alarm device is triggered, and the concrete pouring is prompted to stop for the first time; the detection balls 6 are extruded from the tank body 7, float to the surface of the slurry in the pile hole under the buoyancy action of the slurry in the pile hole, and prompt for stopping concrete pouring for the second time.

Preferably, the detection ball 6 is a light hollow ball, such as a color table tennis ball, and the color is obviously beneficial to being observed quickly.

The detection method of the pile top elevation detection device for the slurry retaining wall cast-in-situ bored pile adopts the detection device, and comprises the following steps:

s1: installing a locking device, fixing a locking rod hinge 2 on the top end of a tank body 7, wherein one end of a locking rod 3 is hinged with the tank body 7 through the locking rod hinge 2, and the other end of the locking rod 3 is a free end; the tension spring hinge 5 is fixed at the middle upper part of the inner side of the tank body 7, one end of the tension spring 4 is hinged with the tension spring hinge 5, and the other end of the tension spring 4 is fixed on the lock rod 3;

s2: fixing the cross rods 8 at the bottom of the tank body 7 side by side, placing the detection ball 6 in the tank body 1, and keeping the tension spring 4 in a natural state;

s3: placing a tank body 7 on the pile cage hanging rib 1, wherein the bottom of the tank body 7 is positioned at the designed virtual pile top height position, adjusting the tank body 7 to be arranged at the relative position with the pile cage hanging rib 1, fixing, and lowering the tank body 7 to the designed virtual pile top height position along with the pile body steel reinforcement cage;

s4: after hole cleaning is finished, concrete is poured; when concrete is poured to the designed virtual pile jacking position, the concrete enters the tank body 7 through the cross rod 8, the detection ball 6 rises under the action of concrete pressure, the lock rod 3 is jacked to trigger the alarm device, and the concrete pouring is prompted to stop for the first time; the detection balls 6 are extruded from the tank body 7, float up to the surface of slurry in the pile hole under the buoyancy action of the slurry in the pile hole, and prompt for stopping concrete pouring for the second time;

s5: and (5) finishing pouring concrete and continuing subsequent construction.

When concrete is poured to the designed virtual pile top high position, a detection ball in the detection device rises under the action of concrete pressure, and triggers an alarm device to prompt for stopping concrete pouring for the first time; and the detection balls are extruded from the tank body, float up to the surface of the slurry in the pile hole under the buoyancy action of the slurry in the pile hole, and prompt for stopping concrete pouring for the second time. The self-made detachable component can be manufactured in advance and fixedly mounted on a construction site, and is simple in structure, simple and convenient to operate and low in processing cost; the system can be used in cooperation with complex and changeable construction sites, and is wide in application range and high in flexibility; the concrete pouring is stopped by two times of prompting, the result of detecting the top elevation of the concrete pile is high in reliability, the production efficiency is improved, and the construction progress and quality are guaranteed.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.