CN216694903U

CN216694903U - Bored concrete pile hole bottom sediment thickness detection reinforcing apparatus

Info

Publication number: CN216694903U
Application number: CN202123371058.1U
Authority: CN
Inventors: 王定伟; 张光建; 李明; 文生奡
Original assignee: Hubei Tianli Building Technology Co ltd
Current assignee: Hubei Tianli Building Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-06-07
Anticipated expiration: 2031-12-29

Abstract

The utility model relates to a bored concrete pile hole bottom sediment thickness detection and reinforcement device which comprises a base, a lifting platform, a rotary power device, a pushing rod, a grouting pump and a probe tube, wherein the lifting platform and the rotary power device are installed on the base, the lifting platform drives the pushing rod to lift, the rotary power device drives the pushing rod to rotate, the probe tube is fixed below the pushing rod, a torsion detector is arranged at the lower part of the probe tube, a resistance plate is arranged at the lower part of the torsion detector and fixed on the probe tube, and a grout outlet is arranged at the lower part of the probe tube. The utility model can quantitatively detect the thickness of the sediment at the bottom of the hole, and simultaneously, a grouting system is arranged in the device to reinforce the sediment. Compared with the traditional process, the method has the advantages of quantification, simple flow, thorough sediment treatment and the like.

Description

Bored concrete pile hole bottom sediment thickness detection reinforcing apparatus

Technical Field

The utility model relates to the field of cast-in-situ bored pile construction, in particular to a device for detecting and reinforcing the thickness of sediment at the bottom of a bored pile hole.

Background

After the cast-in-place pile is formed into a hole by using a drilling machine, particularly, a mud retaining wall operation mode is adopted, sediment with a certain thickness can be reserved at the bottom of the hole, and if the thickness of the sediment is not ascertained and timely treated, the vertical compression-resistant bearing capacity and the sedimentation of the cast-in-place pile can have serious adverse effects.

At present, after a mechanical counter bore of a cast-in-place pile is formed, slagging thickness detection is carried out by constructors, and if the slagging thickness is larger than the standard requirement, a reverse circulation mode is adopted for hole washing. The sediment thickness detection mode is mainly that constructors use lifting ropes and balance weights, the sediment thickness is judged according to resistance felt by the constructors when the balance weights sink, and the method has great subjectivity and non-quantitative property. If the weight and the shape of the balance weight are unreasonable or the components of the sediments are different, constructors can judge the thickness of the sediments at the bottom of the hole. The 'reverse circulation' hole washing has certain requirements on time and mechanical suction, sediment at the bottom of a hole can not be completely removed if process parameters are unreasonable, and sediment thickness detection needs to be repeated after hole washing.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a device for detecting and reinforcing the thickness of the sediment at the hole bottom of a cast-in-place pile, which can quantitatively detect the thickness of the sediment at the hole bottom and simultaneously reinforce the sediment by utilizing a grouting system arranged in the device.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a bored concrete pile hole sediment thickness detects reinforcing apparatus, includes base, lift platform, rotary power device, push rod, grouting pump and spy pipe, lift platform and rotary power device install on the base, the lift platform drive the push rod goes up and down, rotary power device drives the push rod is rotatory, the spy pipe is fixed the push rod below, the lower part of spy pipe is equipped with the torque force detector, torque force detector lower part is equipped with the resistance board, the resistance board is fixed on the spy pipe, the lower part of spy pipe is equipped with out the thick liquid hole.

According to the scheme, the lower end of the probe tube is also provided with a sealing guide cap.

According to the scheme, the resistance plate is in a cross shape.

According to the scheme, the rotary power device is connected with the pushing rod through a gear.

According to the scheme, the probe tube is formed by splicing a plurality of short sections through threaded joints.

The utility model also provides a construction method of the cast-in-place pile hole bottom sediment thickness detection and reinforcement device, which comprises the following steps:

the method comprises the following steps: lifting the push rod and locking the push rod with the lifting platform, connecting the high-strength steel probe tube to the push rod, and lowering the lifting platform until the probe tube is submerged into the drilled hole, wherein the resistance plate is close to the surface of the sediment at the bottom of the hole;

step two: the unlocking lifting platform is connected with the pushing rod, the rotary power device is started, and the rotating torque is transmitted to the lower resistance plate through the pushing rod and the probe tube to drive the resistance plate to rotate;

step three: and recording the return data of the torque force detector, wherein the resistance value changes suddenly for the first time, which indicates that the resistance plate enters the sediment, and the resistance plate passes through the sediment and changes suddenly again when reaching the bottom of the hole. The depth difference of the two resistance mutations is the sediment thickness;

step four: and starting a grouting pump, and performing grouting reinforcement treatment on the sediments.

The cast-in-place pile hole bottom sediment thickness detection reinforcing device has the following beneficial effects:

1. when the drag strap rotates, the resistance can lead to torsion detector to produce distortion, and the resistance is big more, and deformation is big more, and the deformation degree of detector is by installing the gauge data collection inside, and the signal of telecommunication of production passes through in the instrument of wire conduction to ground operation panel. When the resistance data are subjected to sudden change, the resistance plate reaches the surface of the sediment, penetrates through the sediment and reaches the bottom of the hole, and the resistance data are subjected to sudden change again. And the depth difference of the two resistance data mutation is the sediment thickness.

2. The utility model can quantitatively detect the thickness of the sediment at the bottom of the hole, and simultaneously, a grouting system is arranged in the device to reinforce the sediment. Compared with the traditional process, the method has the advantages of quantification, simple flow, thorough sediment treatment and the like.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural diagram of a device for detecting and reinforcing the thickness of sediment at the bottom of a hole of a cast-in-place pile according to the utility model;

FIG. 2 is a schematic structural view of a probe tube;

FIG. 3 is a schematic view of the structure of the push rod and the lifting platform;

FIG. 4 is a top view of FIG. 3;

fig. 5 is a cross-sectional view of the probe tube and torsion probe.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1-5, the device for detecting and reinforcing the thickness of the sediment at the hole bottom of the cast-in-place pile comprises a base 1, a lifting platform 8, a rotary power device, a push rod 5, a grouting pump and a probe tube 4, wherein the lifting platform 8 and the rotary power device are installed on the base 1, the lifting platform 8 drives the push rod 5 to lift, the rotary power device drives the push rod 5 to rotate, the probe tube 4 is fixed below the push rod 5, a torsion detector 2 is arranged at the lower part of the probe tube 4, a resistance plate 3 is arranged at the lower part of the torsion detector 2, the resistance plate 3 is fixed on the probe tube 4, and a through grout outlet 6 is arranged at the lower part of the probe tube 4. The rotary power device is connected with the pushing rod 5 through a gear 9.

After the base 1 is installed and leveled, the probe tube 4 is connected with the pushing rod 5 through the end threaded joint, the pushing rod 5 pushes the probe tube 4 to the ground through the lifting platform 8, and the other probe tube 4 is installed again and reciprocates until the surface of sediment at the bottom of a hole.

The rotating speed of the operating platform of the rotary power device is adjustable, and the rotating torque is transmitted to the lower resistance plate 3 through the push rod 5 and the detection rod to drive the resistance plate 3 to rotate. When the sediment at the bottom of the hole mainly consists of fine-grained soil, high rotating speed is adopted; when the sediment at the bottom of the hole contains coarse sand, the medium rotating speed is adopted; when the sediment at the bottom of the hole contains coarse-grained soil such as gravel, broken stone and the like, the low rotating speed is adopted.

When the resistance plate 3 rotates, the resistance can cause the torsion detector 2 to generate distortion, the larger the resistance is, the larger the distortion is, the deformation degree of the detector is acquired by the strain gauge 10 arranged in the detector, and the generated electric signal is conducted to the instrument of the ground operation table through a lead. When the resistance data are subjected to mutation, the resistance plate 3 reaches the surface of the sediment, the resistance plate 3 penetrates through the sediment, and when the resistance data reach the bottom of the hole, the resistance data are mutated again. And the depth difference of the two resistance data mutations is the sediment thickness.

Optionally, the resistance plate 3 is cross-shaped, and the lower end of the probe tube 4 is further provided with a sealing guide cap 7.

Optionally, the wall thickness of the probe 4 can be determined according to the material composition and the hole depth of the sediment, and the outer diameter should be kept consistent with the inner hole diameter of the torsion detector 2.

Alternatively, the lowering and lifting process of the probe 4 may be performed in other manners, such as using a geological drilling rig or a steel zipper of a small crane.

Optionally, the size of the resistance plate 3 can be changed according to the thickness of sediment, the material composition and the diameter of the hole of the cast-in-place pile, for example, when the sediment at the bottom of the hole is mainly composed of fine granular soil and is loose, the large-size resistance plate 3 can be selected; when the sediment at the bottom of the hole contains coarse-grained soil such as gravel, broken stone and the like, the small-size resistance plate 3 is adopted.

Alternatively, the grouting reinforcement process may be selected according to the sediment thickness, the material composition and the diameter of the bored pile hole, such as a double pipe grouting process.

Optionally, the probe 4 is formed by splicing a plurality of short joints through the threaded joints 11.

the method comprises the following steps: and selecting and determining the proper type of the operating platform and the number of the probe tubes according to the diameter and the depth of the drilled hole.

Step two: and (4) primarily judging the sediment composition attribute according to site stratum conditions and a pore-forming process, and selecting and determining the model of the resistance plate.

Step three: leveling the ground around the drilled hole, leveling the ground operating platform, switching on a power supply and an air compression grouting machine, and stirring slurry.

Step four: promote the propelling movement pole and lock with lift platform, visit the pipe with high strength steel and be connected to the propelling movement pole, descend lift platform, unblock platform and propelling movement pole connection promote lift platform, repeat above step until the single section is visited the pipe and is submerged drilling.

Step five: and repeating the fourth step until the resistance plate is close to the surface of the sediment at the bottom of the hole.

Step six: unblock lift platform and push rod are connected to locking operation panel and push rod are connected, open the constant speed rotation function, and the power gear of built-in variable rotational speed drives the resistance board and rotates through push rod and probe rod transmission turning moment to below resistance board in the operation platform. When the sediment at the bottom of the hole mainly consists of fine-grained soil, high rotating speed is adopted; when the sediment at the bottom of the hole contains coarse sand, the medium rotating speed is adopted; when the sediment at the bottom of the hole contains coarse-grained soil such as gravel, broken stone and the like, the low rotating speed is adopted.

Step seven: and recording the return data of the torque detector, wherein the resistance value changes suddenly for the first time, which indicates that the resistance plate enters the sediment, the resistance plate passes through the sediment, and the resistance data changes suddenly again when the resistance plate reaches the bottom of the hole. The depth difference of the two resistance sudden changes is the sediment thickness.

Step eight: and after the seventh step is finished, the sealing guide cap and the slurry outlet hole are positioned at the bottom of the sediment, the high-speed rotation function of the operating platform is started, the lifting platform is lifted slowly, the grouting pump is started, and grouting reinforcement treatment is carried out on the sediment.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a bored concrete pile hole sediment thickness detects reinforcing apparatus, a serial communication port, including base, lift platform, rotary power device, push rod, grouting pump and spy pipe, lift platform and rotary power device install on the base, the lift platform drive the push rod goes up and down, rotary power device drives the push rod is rotatory, it fixes to visit the pipe the push rod below, the lower part of visiting the pipe is equipped with the torque force detector, the torque force detector lower part is equipped with the resistance board, the resistance board is fixed on visiting the pipe, the lower part of visiting the pipe is equipped with out the thick liquid hole.

2. The device for detecting and reinforcing the thickness of the sediment at the bottom of the hole of the cast-in-place pile according to claim 1, wherein a sealing guide cap is further arranged at the lower end of the probe tube.

3. The bored concrete pile hole bottom sediment thickness detection reinforcing apparatus of claim 1, wherein the resistance plate is cross-shaped.

4. The device for detecting and reinforcing the thickness of the sediments at the bottom of the hole of the cast-in-place pile as recited in claim 1, wherein the rotary power device is connected with the push rod through a gear.

5. The device for detecting and reinforcing the thickness of the sediment at the hole bottom of the cast-in-place pile according to claim 1, wherein the probe is formed by splicing a plurality of short sections through threaded joints.