CN218713034U - Self-drilling type bag grouting structure - Google Patents

Abstract

The utility model relates to a from brill formula bag slip casting structure, include the slip casting pipe and fix the bag on it, the below that lies in the bag on the slip casting pipe fixes a helical blade around the slip casting pipe. The utility model discloses need not to carry out the pore-forming, directly get into the soil body from boring, the construction is simple, to the disturbance and the deformation of protection object in the reducible work progress, can avoid the pollution of pore-forming in-process mud to the environment.

Description

Self-drilling type bag grouting structure

Technical Field

The utility model relates to a from brill formula bag slip casting structure belongs to foundation ditch engineering field.

Background

Excavation of a foundation pit can cause settlement and displacement of surrounding strata, thereby affecting the safety of adjacent protected objects (e.g., pipelines, subway tunnels, buildings). Thus, for example:

the Chinese patent document CN108755699A, namely Chinese patent document deformation control method and device for soil around a foundation pit, which is published as 2018, 11 and 6, proposes that the deformation of the soil is controlled by adopting a bag grouting mode;

the Chinese patent document with the publication number of CN110093927A, 8/6/2019, discloses a method for controlling the deformation of a tunnel outside a foundation pit, and also provides a method for controlling the deformation of a soil body by adopting a bag grouting mode.

Both of the above-mentioned patent documents disclose methods that require a hole to be formed and then a bladder steel tube to be placed in the preformed hole. There are several technical problems:

1) In the process of forming the hole, certain stress release is generated, which may cause further deformation of the protected object;

2) The increase of the hole forming process needs to increase the construction period and the cost;

3) A mud retaining wall may be required in the successful process, and pollution is caused to the environment.

Disclosure of Invention

In order to solve the technical problem, the utility model discloses take following technical means:

a self-drilling type bag grouting structure comprises a grouting pipe and a bag 2 fixed on the grouting pipe, wherein a spiral blade 3 is fixed on the grouting pipe, is positioned below the bag 2 and surrounds the grouting pipe.

Preferably, the grouting pipe is a steel pipe 1.

Further, the helical blade 3 is welded and fixed on the steel pipe 1.

Preferably, the upper end and the lower end of the bag 2 are bound and fixed on the grouting pipe through buckles 4.

Preferably, the protective device 6 is conical or cylindrical and is fixed at the lower part of the bag 2 for protecting the bag from being damaged in the construction process.

Further, the lower end of the steel pipe 1 is connected with an enlarged head steel pipe 5 with a diameter larger than that of the steel pipe 1, and the helical blades 3 are wound and welded on the enlarged head steel pipe 5.

Furthermore, the enlarged head steel pipe 5 is thick in the middle and thin at both ends.

The beneficial effects of the utility model reside in that:

1) The hole is not required to be formed, the drill can directly enter the soil body by self drilling, and the construction is simple;

2) Because independent hole forming is not needed, disturbance and deformation to protected objects (such as pipelines, subway tunnels and buildings) in the construction process can be reduced;

3) Can avoid the pollution of slurry to the environment in the process of forming the hole.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an elevation view of a self-drilling bladder grouting structure in accordance with a first embodiment of the present invention;

fig. 2 is an elevation view of a self-drilling bladder grouting structure according to a second embodiment of the present invention;

fig. 3 is an elevation view of a self-drilling bladder grouting structure in accordance with a third embodiment of the present invention.

In the figure, 1 is a steel pipe, 2 is a bag, 3 is a helical blade, 4 is a buckle, and 5 is an expansion head steel pipe.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

The first embodiment is as follows:

referring to fig. 1, a self-drilling type bladder grouting structure includes a grouting pipe and a bladder 2 fixed thereto, and a spiral blade 3 is fixed to the grouting pipe around the grouting pipe below the bladder 2. The helical blade is coaxial with the grouting pipe, is positioned around the grouting pipe and can be fixed on the grouting pipe in a welding or mechanical mode, wherein the welding mode is simple, convenient and practical.

In this embodiment, the slip casting pipe is a steel pipe 1.

In this embodiment, the helical blade 3 is welded and fixed to the steel pipe 1.

In this embodiment, the upper and lower ends of the bag 2 are bound and fixed on the grouting pipe through the buckles 4.

With continued reference to fig. 1, during construction, the following steps are followed:

s1, opening a hole for grouting in a binding bag section of the steel pipe 1;

s2, binding the bag 2 on the steel pipe 1 by using a buckle 4;

s3, welding a helical blade 3 at the lower end of the steel pipe 1;

in construction, a torque and a downward force are mechanically applied to the steel pipe 1, and the helical blades 3 cut the soil body, so that the steel pipe sinks to a designated position.

Example two:

referring to fig. 2, on the basis of the embodiment, a protection device 6 is additionally arranged, wherein the protection device 6 is conical or cylindrical and is fixed at the lower part of the bag 2 and used for protecting the bag from being continuously used in the construction process, referring to fig. 2, the construction process comprises the following steps:

s1, opening a hole for grouting in a binding bag section of the steel pipe 1;

s2, binding the bag 2 on the steel pipe 1 by using a buckle 4;

s3, welding a helical blade 3 at the lower end of the steel pipe 1;

s4, mounting a protection device 6, wherein the protection device 6 is preferably conical (or cylindrical), so that the capsular bag can be protected from being damaged in construction;

s5, in construction, a torque and a downward force are applied to the steel pipe 1 by using machinery, and the helical blades 3 cut soil bodies, so that the steel pipe sinks to a specified position.

Example three:

referring to fig. 3, in the first embodiment, the lower end of the steel tube 1 is connected to an enlarged head steel tube 5 having a diameter larger than that of the steel tube 1, and the helical blade 3 is wound around and welded to the enlarged head steel tube 5.

In this embodiment, the enlarged head steel pipe 5 has a shape with a thick middle and thin ends.

With continued reference to fig. 3, during construction, the following steps are followed:

s1, opening a hole for grouting in a binding bag section of the steel pipe 1;

s2, binding the bag 2 on the steel pipe 1 by using a buckle 4;

s3, welding an expanded head steel pipe 5 (the diameter of the expanded head steel pipe is larger than that of the steel pipe 1) at the lower end of the steel pipe 1, and welding the spiral blades 3 on the expanded head steel pipe 5;

s4, in construction, applying torque and downward force on the steel pipe 1 by using machinery, and cutting soil by the helical blades 3 to enable the steel pipe to sink to a specified position;

s5, in the process that the steel pipe drills downwards, the expanding head 5 has a lateral soil squeezing effect, the effect of squeezing soil bodies can be achieved, and the double effects of squeezing and grouting reinforcement are achieved.

The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or modifications without departing from the general concept of the present invention, and such changes or modifications should fall within the scope of the present invention as claimed.

Claims (7)

1. The utility model provides a from brill formula bag slip casting structure, includes slip casting pipe and fixes bag (2) on it which characterized in that:

a helical blade (3) is fixed on the grouting pipe below the bag (2) and around the grouting pipe.

2. The self-drilling bladder grouting structure of claim 1, wherein: the grouting pipe is a steel pipe (1).

3. The self-drilling bladder grouting structure of claim 2, wherein: the helical blade (3) is welded and fixed on the steel pipe (1).

4. The self-drilling bladder grouting structure of claim 1, wherein: the upper end and the lower end of the bag (2) are bound and fixed on the grouting pipe through a buckle (4).

5. The self-drilling bladder grouting structure of claim 1, wherein: the protective device (6) is conical or cylindrical and is fixed at the lower part of the bag (2) and used for protecting the bag from being damaged in the construction process.

6. The self-drilling bladder grouting structure of claim 2, wherein: the lower end of the steel pipe (1) is connected with an expansion head steel pipe (5) with the diameter larger than that of the steel pipe (1), and the helical blades (3) are wound and welded on the expansion head steel pipe (5).

7. The self-drilling bladder grouting structure of claim 6, wherein: the enlarged footing steel pipe (5) is thick in the middle and thin at two ends.

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