CN212641464U - Arc drilling bored concrete pile end post-grouting device - Google Patents

Abstract

A post-grouting device for an end of an arc-shaped cast-in-situ bored pile is integrally in a Chinese character 'shan' shape and comprises a grouting pipe, an elastic pipe sleeve and a three-way joint; the elastic pipe sleeve is sleeved outside the grouting pipe; the lateral wall trompil of slip casting pipe, including sharp slip casting pipe and L shape slip casting pipe, install respectively at three way connection's thick liquid inlet and grout outlet, sharp slip casting pipe outside end is equipped with the slip casting mouth sleeve pipe, and L shape slip casting pipe outside end blocks up through end shutoff piece. The utility model is provided with the elastic pipe sleeve to enhance the pressure of the slurry, thereby effectively improving the grouting quality; arranging a linear grouting pipe and an L-shaped grouting pipe to form an arc-shaped grouting device, and effectively preventing the grouting device from being clamped on a filling pile reinforcement cage; all are in threaded connection, so that the assembly and disassembly are convenient; the unit grouting pipe standard parts can be produced in factories, and the production efficiency is improved; the accessible sets up sharp slip casting pipe between L shape slip casting pipe and tee bend to divide into the straight line slip casting pipe multistage unit slip casting pipe end to end threaded connection and form, satisfy various size needs.

Description

Arc drilling bored concrete pile end post-grouting device

Technical Field

The utility model relates to a building drilling bored concrete pile construction field, concretely relates to slip casting device behind arc drilling bored concrete pile end.

Background

With the rapid development of building engineering, the requirement on the bearing capacity of the foundation is higher and higher, the cast-in-situ bored pile is a common foundation form, and the post-grouting method for reinforcing the pile end can not only increase the bearing capacity of the foundation, but also greatly shorten the pile length, so that the post-grouting construction process of the pile foundation is widely applied to pile foundation construction. However, after the existing cast-in-place pile is generally constructed, the cast-in-place pile has the problems of slag inclusion of the pile body or slag deposition at the bottom of the pile, and the like, so that the concrete casting quality is influenced, and the bearing capacity and the normal use of the structure of the engineering pile are further influenced.

The following situations are easy to occur in the construction of a general building cast-in-place pile: 1. in the underwater concrete pouring process, the depth of the conduit embedded in the concrete is not enough; 2. when the pipe is pulled out, the guide pipe needs to be lifted out of the concrete surface; 3. concrete pouring is discontinuous, and the pouring time is too long; 4. cleaning holes unclean or not performing secondary hole cleaning; 5. too large a distance from the bottom of the conduit to the bottom of the hole, etc. The above situations all cause the concrete quality of the cast-in-place pile to be reduced, and the bearing capacity of the engineering pile is seriously influenced.

The measure of taking at present is when ligature dress steel reinforcement cage, reserve the ligature on steel reinforcement cage with the slip casting pipe, treat concrete placement completion back, need carry out the stake and detect, confirm whether the stake needs to carry out the grout processing by the detection report, compensate the quality defect of bored concrete pile, the shortcoming that this kind of way exists is: 1. the position of a grout outlet reserved on the grouting pipe is fixed, the position of a grout outlet which cannot be judged in advance is the position of a concrete defect, and the reserved grout outlet of the grouting pipe is not necessarily arranged at the position with the quality defect; 2. the grouting strength of a single position cannot be determined during grouting, and whether grouting should be stopped is difficult to determine; 3. the grouting strength is difficult to control during grouting, and the grouting amount cannot be determined; 4. in the grouting process, the whole grouting pipe is grouted, the pressure of each grouting hole is difficult to determine, whether grouting needs to be stopped or not is difficult to judge, the distribution of grouting pressure is uneven, and the grouting effect is poor.

Therefore, a novel arc-shaped cast-in-situ pile end post-grouting device is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a slip casting device behind arc drilling bored concrete pile end guarantees the slip casting quality of every grout outlet position, can be quick carry out pressure control to corresponding position to control the injection volume, can improve grouting pressure, effectively guarantee the quality and the effect of slip casting.

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

the utility model provides an arc drilling bored concrete pile end back slip casting device which characterized in that: the whole body is in a shape of Chinese character 'shan', and comprises a grouting pipe, an elastic pipe sleeve and a three-way joint; the elastic pipe sleeve is sleeved outside the grouting pipe; the side wall of the grouting pipe is uniformly provided with grouting holes and comprises a linear grouting pipe and an L-shaped grouting pipe, the linear grouting pipe is installed at a grouting inlet of the three-way joint, and the end part of the outer side of the linear grouting pipe is provided with a grouting opening sleeve; the two L-shaped grouting pipes are respectively arranged at the grout outlets at two sides of the three-way joint, and the outer side end part is plugged through an end plug piece.

Wherein, as the utility model discloses an optimal technical scheme, the end shutoff piece is the sleeve of bottom shutoff, with L shape slip casting threaded connection.

Preferably, the three-way joint is in threaded connection with the linear grouting pipe and the L-shaped grouting pipe.

Further preferably, a linear grouting pipe is also arranged between the L-shaped grouting pipe and the grout outlet of the three-way joint.

Preferably, the straight grouting pipe is formed by sequentially connecting a plurality of sections of unit grouting pipes through threads at the head.

More preferably, the material of the grouting pipe is preferably a stainless steel pipe or a plastic pipe, and the three-way joint and the end plug are metal pieces; the elastic pipe sleeve is a rubber leather sleeve.

Compared with the prior art, the utility model discloses a technical advantage lies in:

1. the grouting device of the utility model is provided with the elastic pipe sleeve to enhance the pressure of the grout, so that each grout outlet on the grouting pipe can be grouted respectively, the grouting pressure at each grout outlet position can not completely meet the pressure requirement at the position due to the fact that the grouting is carried out together, the grouting pressure can be well controlled, and the grouting quality is effectively improved; the slurry sprayed out of the slurry outlet hole can enhance the friction force for the pile body after hardening, which is beneficial to improving the bearing capacity of the engineering pile;

2. the utility model is provided with the straight grouting pipe and the L-shaped grouting pipe simultaneously to form the arc-shaped grouting device, thereby effectively preventing the grouting device from being clamped on the filling pile reinforcement cage in the process of grouting the grouting device below the filling pile hole;

3. the utility model discloses whole be threaded connection, the assembly and disassembly is convenient, but the unit slip casting pipe standard component of mill production, can set up sharp slip casting pipe between L shape slip casting pipe and tee bend, the length of sharp slip casting pipe can be formed by multistage unit slip casting pipe head and the tail threaded connection according to the demand simultaneously, satisfies various size needs, can the design processing back equipment, very big reduction process time improves production efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of an arc-shaped cast-in-situ bored pile end post-grouting device according to the present invention;

fig. 2 is a schematic structural view of a linear grouting pipe according to the present invention;

fig. 3 is a schematic structural view of an L-shaped grouting pipe according to the present invention;

fig. 4 is a schematic structural view of a three-way joint according to the present invention;

fig. 5 is a schematic structural view of an elastic pipe sleeve according to the present invention;

fig. 6 is a schematic structural view of an end plug according to the present invention;

fig. 7 is a schematic structural view of a grouting opening sleeve according to the present invention.

Reference numerals: 1-grouting pipe; 1.1-straight grouting pipe; 1.2-L-shaped grouting pipes; 2-an elastic pipe sleeve; 3-a three-way joint; 3.1-a pulp inlet; 3.2-slurry outlet; 4-slurry outlet; 5-grouting opening sleeve; 6-end plugging piece.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a slip casting device of bored concrete pile, including three slip casting pipe 1, a three way connection 3, three elasticity pipe box 2, two end shutoff pieces 6 and a slip casting mouth sleeve pipe 5, slip casting pipe 1 includes a sharp slip casting pipe 1.1 and two L shape slip casting pipes 1.2.

As shown in fig. 2-7, the side wall of the grouting pipe 1 is uniformly provided with grouting holes 4, including a linear grouting pipe 1.1 and an L-shaped grouting pipe 1.2, the linear grouting pipe 1.1 is installed at a grouting inlet 3.1 of the three-way joint 3, and the end of the outer side is provided with a grouting opening sleeve 5; the L-shaped grouting pipes 1.2 are provided with two grouting holes 3.2 which are respectively arranged at two sides of the three-way joint 3, the outer side end is blocked by an end blocking piece 6, and the end blocking piece 6 is a sleeve with the bottom end blocked and is in threaded connection with the L-shaped grouting pipe 1.2. When grouting, the whole grouting pipe 1 is relatively sealed, so that grouting pressure is greatly improved, the pressure of the inner cavity is continuously improved, the elastic pipe sleeve 2 on the grout outlet hole 4 is pressed open, and cement grout is sprayed out from gaps. The pressure value of the inner cavity needs to be closely paid attention in the grouting process, when the pressure value suddenly drops and then is constant, the grouting can be stopped when the pressure value finally rises to the design pressure, and the grouting construction of one grout outlet hole is completed.

The utility model discloses all be threaded connection, assembly and disassembly is convenient, can produce unit slip casting pipe standard component, can set up sharp slip casting pipe 1.1 between L shape slip casting pipe 1.2 and tee bend, and sharp slip casting pipe 1.1's length can be formed by multistage unit slip casting pipe head and the tail threaded connection according to the demand simultaneously, satisfies various size needs. The material of the grouting pipe 1 is preferably a stainless steel pipe or a plastic pipe, and the three-way joint 3 and the end plugging piece 6 are metal pieces; the elastic pipe sleeve 2 is a rubber leather sleeve.

During specific construction, the structure of the grouting device is firstly decomposed into a plurality of small unit components, the small unit components are machined in a factory, then the small unit components are integrally assembled on site to form a complete unit component, and finally the small unit component is installed. The method decomposes the traditional welding structure into a plurality of unit components, reduces the manual operation intensity and improves the production efficiency.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides an arc drilling bored concrete pile end back slip casting device which characterized in that: the whole body is in a shape of Chinese character 'shan', and comprises a grouting pipe (1), an elastic pipe sleeve (2) and a three-way joint (3); the elastic pipe sleeve (2) is sleeved outside the grouting pipe (1); the side wall of the grouting pipe (1) is uniformly provided with grouting holes (4) which comprise a linear grouting pipe (1.1) and an L-shaped grouting pipe (1.2), the linear grouting pipe (1.1) is arranged at a grouting inlet (3.1) of the three-way joint (3), and the end part of the outer side of the linear grouting pipe is provided with a grouting inlet sleeve (5); the two L-shaped grouting pipes (1.2) are respectively arranged at the grout outlets (3.2) at two sides of the three-way joint (3), and the outer side end is blocked by an end blocking piece (6).

2. The arc-shaped bored pile end post-grouting device according to claim 1, characterized in that: the end plugging piece (6) is a sleeve with the bottom end plugged and is in threaded connection with the L-shaped grouting pipe (1.2).

3. The arc-shaped bored pile end post-grouting device according to claim 1, characterized in that: the three-way joint (3) is in threaded connection with the linear grouting pipe (1.1) and the L-shaped grouting pipe (1.2).

4. The arc-shaped bored pile end post-grouting device according to claim 1, characterized in that: a straight grouting pipe (1.1) is also arranged between the L-shaped grouting pipe (1.2) and the grout outlet (3.2) of the three-way joint (3).

5. The arc-shaped bored pile end post-grouting device according to claim 1, characterized in that: the straight grouting pipe (1.1) is formed by sequentially connecting a plurality of sections of unit grouting pipes through threads at the head.

6. The arc-shaped bored pile end post-grouting device according to claim 1, characterized in that: the grouting pipe (1) is made of a stainless steel pipe or a plastic pipe, and the three-way joint (3) and the end plug piece (6) are metal pieces; the elastic pipe sleeve (2) is a rubber leather sleeve.

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