CN210086236U - A bearing capacity lifting device of cast-in-place pile and cast-in-place pile - Google Patents

Abstract

The utility model provides a bearing capacity lifting device of a cast-in-place pile, which comprises a plurality of vertical pipes and a plurality of inclined pipes; the plurality of the vertical pipes are scattered and bound on the outside of the steel cage of the cast-in-place pile, and the directions are parallel to the The main reinforcement of the reinforcement cage; a plurality of the inclined pipes are scattered and obliquely inserted on the top of the reinforcement cage; the pipe walls of the vertical pipe and the inclined pipe are provided with a plurality of holes, and the opening of each hole is A convex plasma tumor was formed at the site. On the premise of ensuring the bearing capacity of the cast-in-place pile, the utility model can effectively reduce the volume of the cast-in-place pile.

Description

A bearing capacity lifting device of cast-in-place pile and cast-in-place pile

【Technical field】

The utility model relates to a building or a structure facility, in particular to a device for increasing the bearing capacity of a cast-in-place pile and a cast-in-place pile with the device.

【Background technique】

Cast-in-place piles are common deep foundations in the field of civil engineering, including bored cast-in-place piles, immersed cast-in-place piles, artificially dug-in cast-in-place piles, and blast-expanded cast-in-place piles. If the design and construction are reasonable, this type of pile foundation usually has a high bearing capacity, and its settlement is also small under the action of the upper load. Usually, the damage of the pile foundation is not caused by the insufficient strength of the concrete itself, but is often caused by the influence of the soil friction resistance around the pile and the insufficient bearing capacity of the pile end; The processes are closely connected with each other, and various quality defects such as necking and broken piles can easily occur if a little carelessness occurs during construction, which affects the bearing capacity of the pile foundation.

The diameter and length of the cast-in-place pile are large, and the investment is high. On the premise of ensuring its bearing capacity, it is necessary to reduce its volume. In view of this, the present utility model develops a device for improving the bearing capacity of the cast-in-place pile in view of the above-mentioned problems of high bearing capacity and investment of the cast-in-place pile.

【Content of utility model】

The technical problem to be solved by the utility model is to provide a bearing capacity lifting device of a cast-in-place pile and a cast-in-place pile, which can effectively reduce the volume of the cast-in-place pile on the premise of ensuring the bearing capacity of the cast-in-place pile.

The device of the utility model is realized as follows: a bearing capacity lifting device for cast-in-place piles, which is characterized in that: it comprises a plurality of vertical pipes and a plurality of inclined pipes; outside, and the direction is parallel to the main reinforcement of the reinforcement cage; a plurality of the inclined pipes are scattered and obliquely inserted on the top of the reinforcement cage; the pipe walls of the vertical pipe and the inclined pipe are provided with a plurality of holes The vertical pipe and the inclined pipe have poured and shaped expandable slurry, and an outwardly convex slurry tumor is formed at the opening of each hole.

The cast-in-place pile of the present invention is realized in the following way: a cast-in-place pile comprises a steel cage and a concrete pile body which is cast and formed in the steel cage, and is characterized in that it also includes a plurality of vertical pipes and a plurality of inclined pipes A plurality of described vertical pipes are scattered and bound on the outside of the reinforcement cage, and the direction is parallel to the main reinforcement of the reinforcement cage; a plurality of described inclined pipes are scattered and obliquely inserted on the top of the reinforcement cage by the concrete pile body. Fixing; a plurality of holes are arranged on the pipe walls of the vertical pipe and the inclined pipe, and the poured and formed expansive slurry is arranged in the vertical pipe and the inclined pipe, and each hole is A convex plasma tumor was formed at the entrance of the hole.

Further, in the present invention, the angle between the inclined pipe and the horizontal plane is 45-60°.

Further, in the present invention, both the vertical pipe and the inclined pipe are made of steel pipes, the diameter of which is 3-5 cm, and the diameter of the hole is 0.3-0.5 cm.

The utility model has the advantages that the cast-in-place pile of the present utility model effectively increases the bearing capacity of the cast-in-place pile through the bearing capacity raising device, thereby reducing the volume of the cast-in-place pile main body. Among them, the bearing capacity lifting device includes a plurality of vertical pipes and a plurality of inclined pipes; making full use of high pressure to inject the slurry, the slurry spreads to the periphery along the bottom and holes of the vertical pipes and the inclined pipes, and cuts into the soil, which can increase the size of the cast-in-place piles. The diameter of the pile end forms several bulges around the pile; the expansive soil in the slurry is used to increase the volume of the injected slurry, which further increases the volume of the bulge around the pile. The inclined pipe and the slurry form a number of inclined piles, which are fixedly connected around the cast-in-place pile, and can bear the load of the upper structure together with the cast-in-place pile, greatly improving the friction resistance and end resistance around the cast-in-place pile.

【Description of drawings】

The present utility model will be further described below with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic view of the front structure of the bearing capacity lifting device of the cast-in-place pile of the present invention.

Figure 2 is a schematic structural diagram of the cast-in-place pile of the present invention.

Figure 3 is a schematic structural diagram of a single vertical pipe or inclined pipe in the present invention.

4 is a schematic top view of the structure of the utility model after the vertical pipe and the reinforcement cage are fixed.

【Detailed ways】

Please refer to FIGS. 1 to 4 , the bearing capacity lifting device of the cast-in-place pile of the present invention includes a plurality of vertical pipes 1 and a plurality of inclined pipes 2; The outside of the reinforcement cage 3, and the direction is parallel to the main reinforcement 31 of the reinforcement cage 3; a plurality of the inclined pipes 2 are scattered and obliquely inserted on the top of the reinforcement cage 3; the vertical pipe 1 and the inclined pipe 2 A plurality of holes 12 (22) are arranged on the pipe wall of the vertical pipe 1 and the inflatable slurry is poured and formed in the vertical pipe 1 and the inclined pipe 2, and each of the holes 12 (22) forms a A convex plasma tumor 4.

When the angle θ between the inclined pipe 2 and the horizontal plane is 45-60°, a better supporting force can be provided. The vertical pipe 1 and the inclined pipe 2 are both made of steel pipes, the diameter of which is 3-5 cm, and the diameter of the hole 12 (22) is preferably 0.3-0.5 cm.

The realization of the above-mentioned bearing capacity lifting device and the process of combining it with the cast-in-place pile are as follows:

During the specific construction, first drill a number of holes 12 (22) on the standpipe 1 and the inclined pipe 2, bind the standpipe 1 to the outside of the reinforcement cage 3 of the cast-in-place pile, and put the reinforcement cage 3 into the borehole of the foundation. , pour the concrete used to form the concrete pile body 5, and press the inclined pipe 2 through the concrete obliquely with mechanical equipment into the concrete. When the concrete strength is slightly greater than the strength of the surrounding soil body, the vertical pipe 1 and the inclined pipe 2 are respectively Connect the high-pressure grouting machine, inject the expandable slurry into the vertical pipe 1 and the inclined pipe 2, and control the grouting pressure at 5-15MPa. The expansive slurry is expansive cement mortar, which is uniformly mixed with ordinary cement, fine sand, expansive soil and tap water, and its weight ratio is 5:2:1:3. Then it will flow out from the hole 12 ( 22 ) to form an outwardly convex plasma tumor 4 at the hole.

Through the above process, the cast-in-place pile as shown in Figure 2 is formed, the cast-in-place pile includes a steel cage 3 and a concrete pile body 5 casted and formed in the steel cage, and also includes a plurality of vertical pipes 1 and a plurality of inclined pipes. 2; A plurality of the vertical pipes 1 are scattered and bound on the outside of the reinforcement cage 3, and the direction is parallel to the main bars 31 of the reinforcement cage 3; The top is fixed by the concrete pile body 5; the pipe walls of the vertical pipe 1 and the inclined pipe 2 are provided with a plurality of holes 12 (22). The poured and shaped expandable slurry forms an outwardly convex slurry tumor 4 at the opening of each of the holes.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments we describe are only illustrative, and not used to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims (6)

1. The utility model provides a bearing capacity hoisting device of bored concrete pile which characterized in that: comprises a plurality of vertical pipes and a plurality of inclined pipes; the plurality of vertical pipes are dispersedly bound on the outer side of a reinforcement cage of the cast-in-place pile, and the direction of the vertical pipes is parallel to a main reinforcement of the reinforcement cage; the plurality of inclined pipes are dispersedly and obliquely inserted at the top of the reinforcement cage; the pipe walls of the vertical pipe and the inclined pipe are provided with a plurality of holes, the vertical pipe and the inclined pipe are internally provided with expandable slurry which is poured and formed, and an outward protruding slurry tumor is formed at the hole opening of each hole.

2. A load-bearing capacity elevating apparatus for a bored concrete pile according to claim 1, wherein: the inclined tube and the horizontal plane included angle is 45 ~ 60.

3. A load-bearing capacity elevating apparatus for a bored concrete pile according to claim 1, wherein: the vertical pipe and the inclined pipe are both made of steel pipes, the diameter of each vertical pipe is 3-5 cm, and the diameter of each hole is 0.3-0.5 cm.

4. A bored concrete pile, includes steel reinforcement cage and the concrete pile body through pouring and take shape in the steel reinforcement cage, its characterized in that: the device also comprises a plurality of vertical pipes and a plurality of inclined pipes; the plurality of vertical pipes are dispersedly bound at the outer side of the reinforcement cage, and the direction of the vertical pipes is parallel to the main reinforcement of the reinforcement cage; the plurality of inclined pipes are dispersedly and obliquely inserted into the top of the reinforcement cage and fixed by the concrete pile body; the pipe walls of the vertical pipe and the inclined pipe are provided with a plurality of holes, the vertical pipe and the inclined pipe are internally provided with expandable slurry which is poured and formed, and an outward protruding slurry tumor is formed at the hole of each hole.

5. A cast-in-place pile according to claim 4, wherein: the inclined tube and the horizontal plane included angle is 45 ~ 60.

6. A cast-in-place pile according to claim 4, wherein: the vertical pipe and the inclined pipe are both made of steel pipes, the diameter of each vertical pipe is 3-5 cm, and the diameter of each hole is 0.3-0.5 cm.

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