CN211773589U

CN211773589U - Annular grouting pipe at bottom of post-grouting bored pile

Info

Publication number: CN211773589U
Application number: CN202020286089.3U
Authority: CN
Inventors: 刘一翔; 刘瑞军; 刘富海; 朱建锋; 王宇翔
Original assignee: Real Estate Investment Co Ltd of China Railway 16th Bureau Group Co Ltd
Current assignee: Real Estate Investment Co Ltd of China Railway 16th Bureau Group Co Ltd
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-10-27
Anticipated expiration: 2030-03-10

Abstract

The utility model discloses an annular slip casting pipe in back pressure mud jacking bored concrete pile bottom, including upper portion vertical section and bottom ring section, be connected through welded fastening between upper portion vertical section and the bottom ring section, plum blossom form hole has all been seted up to the side of upper portion vertical section and bottom ring section. The utility model discloses, through the annular design of slip casting socle portion, when not increasing slip casting pipe quantity, realize the synchronous mud jacking construction in multiple spot position of drilling bored concrete pile bottom and stake side, through the design of bottom ring segment, the quantity of slip casting pipe when making the device reduce the slip casting construction behind the bored concrete pile, both can practice thrift construction material, can reduce the work progress again, require lowly to operating personnel, application scope is wide to really realize retrenching construction cost's optimization construction.

Description

Annular grouting pipe at bottom of post-grouting bored pile

Technical Field

The utility model relates to a pile foundation construction technical field especially relates to an annular slip casting pipe in back-pressure mud jacking drilling bored concrete pile bottom.

Background

The cast-in-situ bored pile has the advantages of large bearing capacity, small influence on the surrounding environment, capability of penetrating through soft and hard rock strata, convenience in construction and installation of construction equipment and the like, and is widely applied to pile foundation construction. Usually, most of the construction of the cast-in-situ bored pile is carried out under water and soil, the conditions in the pile hole cannot be directly observed in the construction process, and the quality of the pile body cannot be directly judged. Therefore, the post grouting technology is provided for meeting the pile foundation construction function. The so-called post-grouting technology for the bored pile is essentially a technology for enhancing the bearing capacity of the bored pile by grouting means, not only can retain the advantages of the original bored pile, but also can optimize, improve and repair the bored pile.

Traditional slip casting pipe is a vertical pipe, often needs many slip casting pipes during the use, so both extravagant construction material, how again can add the construction process, increased the cost of construction.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an annular grouting pipe at the bottom of a post-grouting bored concrete pile.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an annular slip casting pipe in back mud jacking drilling bored concrete pile bottom, includes upper portion vertical section and bottom ring segment, pass through welded fastening between upper portion vertical section and the bottom ring segment and be connected, plum blossom form hole has all been seted up with the side of bottom ring segment to the vertical section in upper portion.

As a further description of the above technical solution:

the upper vertical section is a hollow round galvanized steel pipe, and a plurality of groups of plum blossom-shaped holes are uniformly formed in the side surface of the upper vertical section.

As a further description of the above technical solution:

the bottom annular section is a hollow annular round galvanized steel pipe, and a plurality of groups of plum blossom-shaped holes are uniformly formed in the side surface of the bottom annular section (2).

The utility model discloses following beneficial effect has:

1. compared with the prior art, the annular grouting pipe at the bottom of the post-grouting bored concrete pile realizes multi-point-position synchronous grouting construction at the bottom and the side of the bored concrete pile through the annular design at the bottom of the grouting pipe without increasing the number of the grouting pipes.

2. Compared with the prior art, the annular grouting pipe at the bottom of the post-grouting bored concrete pile has the advantages that the number of the grouting pipes during post-grouting construction of the bored concrete pile is reduced through the design of the annular section at the bottom, so that the construction materials can be saved, the construction procedures can be reduced, the requirement on operators is low, the application range is wide, and accordingly optimized construction with simplified construction cost is really realized.

3. Compared with the prior art, the annular grouting pipe at the bottom of the post-grouting bored concrete pile is made of the galvanized steel pipe as the whole material, and the material taking cost and the manufacturing cost are lower.

Drawings

Fig. 1 is the utility model provides an overall structure schematic diagram of the annular grouting pipe in back pressure mud jacking drilling bored concrete pile bottom.

Illustration of the drawings:

1. an upper vertical section; 2. a bottom annular segment; 3. plum blossom-shaped holes.

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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the utility model provides a pair of annular slip casting pipe in back mud jacking drilling bored concrete pile bottom: including upper portion vertical section 1 and bottom ring segment 2, through welded fastening connection between upper portion vertical section 1 and the bottom ring segment 2, plum blossom shape hole 3 has all been seted up with the side of bottom ring segment 2 to upper portion vertical section 1, and plum blossom shape hole 3's effect is used for grouting at the bottom of the stake.

The upper vertical section 1 is a hollow round galvanized steel pipe, a plurality of groups of quincunx holes 3 are uniformly formed in the side surface of the upper vertical section 1, the bottom annular section 2 is a hollow annular round galvanized steel pipe, and a plurality of groups of quincunx holes 3 are uniformly formed in the side surface of the bottom annular section 2.

The working principle is as follows: when in use, if the length of the bored pile is longer, a section of hollow circular steel pipe is required to be connected on the vertical section 1 at the upper part of the annular grouting pipe at the bottom of the rear grouting bored pile of the utility model until the grouting pipe is put down to reach within one meter of the bottom of the pile, then binding the upper vertical section (1) on a reinforcement cage, putting the device and the reinforcement cage together into a cast-in-situ bored pile to a specified depth, preparing cement for grouting, before grouting, slurry is not required to be stirred in a slurry storage barrel, impurities in grouting holes are cleaned, the impurities in the holes need to be cleaned, otherwise, hidden danger of the whole grouting construction quality can be caused, before concrete is poured, broken stones or block stones are poured into the hole bottom, a slurry outlet is buried in the broken stones or the block stones, pressure is increased step by step from small to large until the designed pressure is reached, and the pressure is stabilized for a period of time to ensure full grouting.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides an annular slip casting pipe in back mud jacking bored concrete pile bottom, includes upper portion vertical section (1) and bottom ring segment (2), its characterized in that: the upper portion vertical section (1) is fixedly connected with the bottom annular section (2) through welding, and plum blossom-shaped holes (3) are formed in the side faces of the upper portion vertical section (1) and the bottom annular section (2).

2. The annular grouting pipe at the bottom of the post-grouting bored pile according to claim 1, wherein: the upper vertical section (1) is a hollow round galvanized steel pipe, and a plurality of groups of plum blossom-shaped holes (3) are uniformly formed in the side surface of the upper vertical section (1).

3. The annular grouting pipe at the bottom of the post-grouting bored pile according to claim 1, wherein: the bottom ring-shaped section (2) is a hollow annular round galvanized steel pipe, and a plurality of groups of plum blossom-shaped holes (3) are uniformly formed in the side surface of the bottom ring-shaped section (2).