CN211368723U

CN211368723U - Novel grouting pipe

Info

Publication number: CN211368723U
Application number: CN201921748219.4U
Authority: CN
Inventors: 张莹
Original assignee: Nanjing Institute of Industry Technology
Current assignee: Nanjing Institute of Industry Technology
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-08-28
Anticipated expiration: 2029-10-18

Abstract

The utility model discloses a novel slip casting pipe, include: a main pipe; one end of the communicating pipe is communicated with the main pipe; the two ends of the guniting pipe are sealed, the guniting pipe and the main pipe are arranged in parallel, the other end of the communicating pipe is communicated with the side wall of the guniting pipe, and a plurality of guniting holes are formed in the side wall of the guniting pipe in the vertical direction. The utility model provides a slip casting pipe is through setting up the shotcrete pipe, and sets up the whitewashing hole on the shotcrete pipe, and the stake downthehole wall setting is pressed close to the shotcrete pipe, and the whitewashing hole can be directly with stake side mud skin and stake side soil layer contact after the thick liquid is spout from the shotcrete hole, has avoided the separation effect of pile body concrete to the thick liquid, has effectively improved the slip casting effect of stake side.

Description

Novel grouting pipe

Technical Field

The utility model relates to an engineering construction field especially relates to a novel slip casting pipe.

Background

China's economy develops at a high speed, and limited urban ground space cannot meet the increasing demand of people for living space. With the development of civil and architectural engineering towards large-scale and group-oriented development and the development of urban buildings towards high-rise and super high-rise buildings, the position of the pile foundation in the basic engineering becomes more important. Among various pile foundation types, the most rapidly developed and widely applied pile foundation is a cast-in-place pile, which is the most common pile foundation form in the construction of the pile foundation of the building engineering and plays an important role in the reinforcement construction of a plurality of foundations. However, due to the inherent defects of the cast-in-place pile hole forming process, pile bottom sediment and a pile side mud film exist, and the pile end resistance and the pile side frictional resistance are obviously reduced. In order to eliminate the influence of the pile bottom sediment and the pile peripheral mud film on the cast-in-place pile, pressure grouting measures are implemented on the pile end and the pile side.

The post-grouting bored concrete pile is characterized by that it utilizes the grouting pipes embedded in the bottom portion and side surface of reinforcement cage in advance, after the pile is formed and the concrete of pile body is cured and reached to the preset strength, the high-pressure pump is used to combine the slurry capable of being solidified with the soil body around the pile body by means of the actions of infiltration, splitting, filling and compacting, etc. so as to solidify the pile bottom sediment and pile side mud skin produced in the hole-forming process of mud wall-protecting method. The post-grouting technology comprises post-grouting at the bottom of the pile, post-grouting at the side of the pile and combined post-grouting at the side of the pile at the bottom of the pile. The grouting pipe adopted by the post-grouting technology is generally a steel pipe and is longitudinally arranged along the pile body, and is bound, fixed or welded on the inner side of the reinforcement cage, and when the reinforcement cage is placed downwards, the grouting pipe is placed into the pile hole along with the reinforcement cage. The pile side grouting pipe is drilled at a grouting point to form a perforated pipe, and before grouting, the hole of the pile side grouting pipe is tightly bound by a rubber hoop, an adhesive tape and the like so as to prevent cement slurry from entering the perforated pipe to cause blockage during concrete pouring. When grouting, the pressure pushes the holes open and the grout is sprayed out.

In actual engineering, the post-grouting technology at the pile bottom is mature, the solidification of the sediment at the pile bottom can be better realized, and the post-grouting technology at the pile side has some problems in practical application. The time for implementing pile side pressure grouting is generally after pile body concrete is condensed, at the moment, the concrete has certain strength and is poor in permeability, although large grouting pressure grout hardly permeates the pile body concrete, the grout cannot be in contact with a pile side soil layer and a pile side mud skin, and the pile side grouting effect is poor.

SUMMERY OF THE UTILITY MODEL

The purpose of this application embodiment is through providing a novel slip casting pipe, to the relatively poor technical problem of stake side slip casting effect who mentions in the background art, can effectively improve the construction effect of stake side post-grouting.

The embodiment of the application provides a novel slip casting pipe, include: a main pipe;

one end of the communicating pipe is communicated with the main pipe; and

the two ends of the guniting pipe are sealed, the guniting pipe and the main pipe are arranged in parallel, the other end of the communicating pipe is communicated with the side wall of the guniting pipe, and a plurality of guniting holes are formed in the side wall of the guniting pipe in the vertical direction.

Further, novel slip casting pipe is used and is installed on the steel reinforcement cage, be responsible for and fix the inboard of steel reinforcement cage, the shotcrete pipe is located outside the steel reinforcement cage just the shotcrete hole with the steel reinforcement cage carries on the back mutually.

Further, the main pipe is located on the inner side of the reinforcement cage and fixed on the reinforcement cage through binding or welding.

Further, the guniting holes are distributed on the side wall of the guniting pipe at equal intervals.

Further, a rubber film is arranged on the guniting hole. The rubber membrane is arranged to prevent the concrete poured in the pile forming stage of the pouring pile from blocking the grout spraying hole.

Compared with the prior art, the utility model discloses beneficial effect that can realize is at least as follows: the setting is responsible for the shotcrete pipe that is linked together with the person in charge, set up the whitewashing hole on the shotcrete pipe, the slip casting pipe is fixed along with being responsible for when putting into the stake hole on the steel reinforcement cage, the inner wall in stake hole is pressed close to the lateral wall that is provided with the whitewashing hole on the shotcrete pipe blocks the thick liquid with the concrete that prevents to solidify, the thick liquid is direct to be contacted with stake side mud skin and stake side soil layer after spouting from the whitewashing hole, through infiltration, the splitting, pack, effect such as crowded secret, avoided the separation effect of pile body concrete to the thick liquid, the slip casting effect of stake side has effectively been improved.

Drawings

Fig. 1 is a front view of a novel grouting pipe provided by an embodiment of the present invention.

Fig. 2 is a side view of a novel grouting pipe provided by an embodiment of the present invention.

Fig. 3 is a schematic view of a novel slip casting pipe installed on a reinforcement cage provided by the embodiment of the present invention.

Fig. 4 is a top view of fig. 3.

In the figure, 1, main pipe; 2. a communicating pipe; 3. a guniting pipe; 4. a guniting hole; 5. and (4) a reinforcement cage.

Detailed Description

For a better understanding of the present invention, the following examples are provided to further illustrate the present invention, but the present invention is not limited to the following examples.

Referring to fig. 1-4, an embodiment of the present invention provides a novel grouting pipe, which includes a main pipe 1, a communicating pipe 2, and a slurry spraying pipe 3, where the main pipe 1, the communicating pipe 2, and the slurry spraying pipe 3 are steel pipes.

The main pipe 1 is used for being fixed on a reinforcement cage, and grout can be introduced into the main pipe. During grouting, the main pipe 1 is connected with a high-pressure pump, and the high-pressure pump pumps the grout into the main pipe 1.

The communicating pipe 2 is used for communicating the main pipe 1 and the guniting pipe 3. The axial direction of communicating pipe 2 is perpendicular mutually with the axial direction of being responsible for 1 in this embodiment, and the one end of communicating pipe 2 is linked together with being responsible for 1, and the other end of communicating pipe 2 is linked together with the lateral wall of shotcrete pipe 3.

During construction, a grouting point needs to be determined, and the main pipe 1 is communicated with a communicating pipe 2 and a slurry spraying pipe 3 communicated with the corresponding communicating pipe 2 at a position corresponding to the grouting point.

The both ends of whitewashing pipe 3 are sealed, and whitewashing pipe 3 and the parallel arrangement of being responsible for 1, and the other end of communicating pipe 2 is linked together with whitewashing pipe 3's lateral wall, has seted up a plurality of whitewashing holes 4 along vertical direction equidistant on whitewashing pipe 3's the lateral wall. The guniting pipe 3 is communicated with the main pipe 1 through the communicating pipe 2, so that the slurry in the main pipe 1 can enter the guniting pipe 3 through the communicating pipe 2 and then is sprayed out from a guniting hole 4 on the guniting pipe 3. The main pipe 1 is fixedly installed on the reinforcement cage 5 in a binding or welding mode, when the guniting pipe 3 is placed into the pile hole along with the main pipe 1, the side wall of the guniting pipe 3, which is provided with the guniting hole 4, is close to the inner wall of the pile hole, and the arrangement is to prevent the solidified concrete from blocking grout in the post-grouting stage, so that the pile side grouting effect can be effectively improved.

In this embodiment, the grout spraying hole 4 is provided with a rubber mold, so that the grout spraying hole 4 can be prevented from being blocked by the concrete poured in the pile forming stage of the cast-in-place pile, and the rubber mold can be opened under high pressure in the post-grouting stage, so that grout can be sprayed out from the grout spraying hole.

When fixing the slip casting pipe, will be responsible for 1 and place in 5 inboards of steel reinforcement cage, rotate and be responsible for 1, will communicate pipe 2 rotate to be located 5 outsides of steel reinforcement cage and the whitewashing hole on the whitewashing pipe and carry on the back mutually with steel reinforcement cage 5, will be responsible for 1 and fix on steel reinforcement cage 5 through ligature or welded mode, it is downthehole to put into the stake that has been beaten together with steel reinforcement cage 5 with the slip casting pipe, put good steel reinforcement cage 5 back, the stake hole inner wall is pressed close to in lateral wall department that offers whitewashing hole 4 on the slip casting pipe 3. During grouting, grout is pumped into the main pipe 1 through the high-pressure pump, enters the grout spraying pipe 3 through the communicating pipe 2 and is sprayed out from the grout spraying hole 4 to fill a gap between the pile side mud skin and the pile side soil layer, and a series of physical and chemical changes are generated between the pile side mud skin and the pile side soil layer, so that the effects of permeating, splitting, filling and compacting the soil body around the pile are achieved, and the pile side grouting effect is effectively improved.

The utility model discloses the part that does not relate to all is the same with prior art or adopts prior art to realize.

The foregoing is only a preferred embodiment of the present invention and is not intended to limit the invention in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.

Claims

1. The utility model provides a novel slip casting pipe which characterized in that: the method comprises the following steps:

a main tube (1);

one end of the communicating pipe (2) is communicated with the main pipe (1); and

the guniting pipe (3), the both ends of guniting pipe (3) are sealed, just guniting pipe (3) with be responsible for (1) parallel arrangement, the lateral wall of guniting pipe (3) with the other end of communicating pipe (2) is linked together, a plurality of whitewashing holes (4) have been seted up along vertical direction on the lateral wall of guniting pipe (3).

2. The novel grouting pipe of claim 1, wherein: novel slip casting pipe is used and is installed on steel reinforcement cage (5), be responsible for (1) and fix the inboard of steel reinforcement cage (5), whitewashing pipe (3) are located outside steel reinforcement cage (5) just whitewashing hole (4) with steel reinforcement cage (5) carry on the back mutually.

3. The novel grouting pipe of claim 2, wherein: the main pipe (1) is located on the inner side of the reinforcement cage (5) and fixed on the reinforcement cage (5) through binding or welding.

4. The novel grouting pipe of claim 1, wherein: the guniting holes (4) are distributed on the side wall of the guniting pipe (3) at equal intervals.

5. The novel grouting pipe of claim 1, wherein: and a rubber film is arranged on the guniting hole (4).