CN211647991U - Drill bit for high-pressure jet grouting pile machine - Google Patents

Abstract

The utility model discloses a high pressure jet grouting pile machine drill bit relates to high pressure jet grouting pile machine technical field, include: the drilling tool comprises a drilling bit, a pipeline, a slurry pipe and an air bag, wherein the drilling bit is hollow, the pipeline and the slurry pipe are arranged inside the drilling bit, a slurry spraying opening and an outlet are formed in the side wall of the drilling bit, one end of the pipeline is communicated with one end of a drill pipe, the other end of the pipeline extends out of the outlet and is communicated with the air bag, one end of the slurry pipe is communicated with one end of the drill pipe, and the other end of the slurry pipe is communicated with the slurry spraying opening. Therefore, the utility model discloses simple structure, and be favorable to improving work efficiency and reduce cost, solved the technical problem that the cost is high and work efficiency is low that prior art exists.

Description

Drill bit for high-pressure jet grouting pile machine

Technical Field

The utility model relates to a stake machine technical field is spouted soon to high pressure, especially relates to a drill bit for stake machine is spouted soon to high pressure.

Background

The sleeve valve pipe grouting method is characterized in that slurry is injected (pressed) into a rock-soil layer through large pressure, the stoppers above and below the grouting core pipe can realize segmented layered grouting, and continuous or skip grouting can be selected according to construction requirements. In the construction requiring whole-course grouting, the construction method ensures that both a loose stratum and a denser stratum obtain good grouting reinforcement effect through sectional grouting, and avoids the phenomena that the grouting amount of the loose stratum is large and the grouting of the denser stratum cannot be performed when the loose stratum and the denser stratum exist simultaneously in the conventional grouting process.

The sleeve valve pipe grouting process flow comprises the following steps:

1. measuring and lofting: and calculating the coordinate position of the lead hole according to the distributed control point coordinates, discharging the hole position by using a total station, measuring the ground elevation by using a level gauge, and determining the depth of the lead hole.

2. Drilling: and drilling a hole by adopting a sleeve retaining wall water flushing method, wherein the drilling depth is up to the grouting consolidation section. And recording is required in the drilling process, and reference data is provided for grouting operation.

3. Tube laying: firstly, connecting a sleeve valve pipe according to the depth of a pilot hole, wherein the upper opening of the sleeve valve pipe is exposed out of the ground by 20cm, and sealing the lower opening of the connected sleeve valve pipe by using a sharp bottom; the sleeve valve tube is then lowered into the hole, ensuring that the sleeve valve tube is lowered to the bottom of the hole.

4. Hole washing: cleaning the hole by using high-pressure water to reduce the specific gravity of sediment and slurry in the hole;

5. and (3) sealing: and the quick-setting cement mortar is adopted to block within the distance range of 1m from the ground around the orifice to the ground, so that the slurry bleeding phenomenon in the grouting process is prevented.

6. Grouting: and (4) adopting sectional grouting, wherein the length of each section of grouting becomes a grouting step. The length of the open steel pipe is the length of the grouting step. The grouting step pitch is generally selected to be 0.6-1 m, so that the influence of stratum heterogeneity on the grouting effect can be effectively reduced. For a sand layer, the grouting step distance is preferably low; for pebbles or broken rock strata, the grouting step distance is preferably high. In the grouting process, after each section of grouting is finished, the core pipe moves upwards or downwards by the length of the core pipe with one step. The core tube is preferably moved by adopting a lifting device, or the core tube is manually and symmetrically clamped by adopting 2 tube clamps, and the two sides of the core tube are simultaneously and uniformly forced to move. And (4) removing a section of grouting core pipe every time the grouting length of 3-4 m is finished. After grouting, covering the upper cover of the grouting pipe with a blank cap to facilitate re-grouting construction.

The above process has the technical defects of high cost and low working efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high pressure jet grouting pile machine drill bit to solve the problem that above-mentioned prior art exists, simple structure, and be favorable to improving work efficiency and reduce cost.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a high pressure spouts drill bit for pile machine soon, including drill bit, pipeline, thick liquid pipe and gasbag, the inside cavity of drill bit, inside pipeline and the thick liquid pipe of being provided with of drill bit, the drill bit lateral wall is provided with whitewashing mouth and export, pipeline one end and drilling rod pipeline one end intercommunication, the pipeline other end stretches out the export with the gasbag intercommunication, thick liquid pipe one end with drilling rod thick liquid pipe one end intercommunication, the thick liquid pipe other end with whitewashing mouth intercommunication.

Preferably, the number of the air bags is two.

Preferably, the grout port is located between the two air bags.

Preferably, the number of the guniting holes is multiple.

Preferably, the drill bit is detachably connected with the drill rod through a flange.

Preferably, the air bag is made of rubber.

Preferably, the pipeline is an air pipe or a water pipe.

Preferably, the drill is used for being connected with a double-pipe high-pressure rotary jet grouting pile machine or a triple-pipe high-pressure rotary jet grouting pile machine.

The utility model discloses for prior art gain following technological effect:

the utility model provides a high pressure jet grouting pile machine drill bit, including the drill bit, the pipeline, thick liquid pipe and gasbag, the inside cavity of drill bit, inside pipeline and the thick liquid pipe of being provided with of drill bit, the drill bit lateral wall is provided with whitewashing mouth and export, pipeline one end and drilling rod pipeline intercommunication, the pipeline other end and gasbag intercommunication, inject the slip casting region through the gasbag, stretch out from the whitewashing mouth through slip casting pipe one end, the completion is slip casting in injecing the region, simple structure's advantage has, and above-mentioned process can be purchased, the process of preparation slip casting pipe and transfer slip casting pipe, thereby be favorable to improving work efficiency and practice thrift the cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and 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 a cross-sectional view of a drill bit for a high-pressure jet grouting pile machine provided by the present invention;

fig. 2 is a cross-sectional view of the working state of the drill bit for the high-pressure jet grouting pile machine provided by the invention;

wherein: 1. a drill bit; 2. an air bag; 3. a pipeline; 4. a pulp pipe; 5. and (4) a slurry spraying port.

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 efforts belong to the protection scope of the present invention.

The utility model aims at providing a high pressure jet grouting pile machine drill bit to solve the problem that prior art exists, simple structure, and be favorable to improving work efficiency and reduce cost.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

As shown in FIGS. 1-2: the embodiment provides a drill bit 1 for a high-pressure rotary jet grouting pile machine, which comprises a drill bit 1, a pipeline, a slurry pipe and an air bag 2, wherein the drill bit 1 is hollow, the inside of the drill bit 1 is provided with a pipeline 3 and a slurry pipe 4, the side wall of the drill bit 1 is provided with a slurry spraying port 5 and an outlet, one end of the pipeline 3 is communicated with one end of a drill pipe, the other end of the pipeline 3 extends out of the outlet and is communicated with the air bag 2, so that gas is filled into the air bag 2, and the air bag 2 is used for limiting the grouting range around the; one end of the slurry pipe 4 is communicated with one end of the drill rod slurry pipe, and the other end of the slurry pipe 4 is communicated with the slurry spraying port 5 and used for grouting in the designated area. Therefore, the utility model discloses simple structure, and can save purchase, preparation slip casting pipe and transfer the process of slip casting pipe to be favorable to improving work efficiency and practice thrift the cost.

The number of air cells 2 is preferably two, and they are spaced apart along the length of the drill bit 1.

A grout port 5 is located between the two air bags 2 for grouting an area defined between the two air bags 2.

The number of the spouting ports 5 is plural, preferably 6.

The drill bit 1 is detachably connected with the drill rod through a flange.

The bladder 2 is preferably made of rubber.

The conduit 3 is preferably an air or water pipe.

The drill bit 1 is usually used for being connected with a double-pipe high-pressure rotary jet pile machine or a triple-pipe high-pressure rotary jet pile machine, when the drill bit 1 is connected with the double-pipe high-pressure rotary jet pile machine, the pipeline 3 adopts an air pipe, and when the drill bit 1 is connected with the triple-pipe high-pressure rotary jet pile machine, the pipeline 3 adopts a water pipe. The working process is as follows:

stage one: normally drilling;

and a second stage: reaching the designed hole depth;

and a third stage: the air compressor works to inflate the air bags 2 to lock the grout injection range, namely the area between the air bags 2, and then grout is pumped in through the grout pipe to perform grouting in the designated grouting area.

And a fourth stage: after injecting the slurry, the design requirement grouting amount or grouting pressure is reached, and the pressure is maintained for more than half an hour;

and a fifth stage: the air bag 2 releases pressure and recovers the original state;

and a sixth stage: and repeating the third, fourth and fifth stages to finish accurate grouting on other specified areas.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims (8)

1. The utility model provides a drill bit for high pressure jet grouting pile machine which characterized in that: including drill bit, pipeline, thick liquid pipe and gasbag, the inside cavity of drill bit, inside pipeline and the thick liquid pipe of being provided with of drill bit, the drill bit lateral wall is provided with whitewashing mouth and export, pipeline one end and drilling rod pipeline one end intercommunication, the pipeline other end stretches out the export with the gasbag intercommunication, thick liquid pipe one end with drilling rod thick liquid pipe one end intercommunication, the thick liquid pipe other end with whitewashing mouth intercommunication.

2. The drill bit for the high-pressure jet grouting pile machine according to claim 1, characterized in that: the number of the air bags is two.

3. The drill bit for the high-pressure jet grouting pile machine according to claim 2, characterized in that: the guniting port is positioned between the two air bags.

4. The drill bit for the high-pressure jet grouting pile machine according to claim 1, characterized in that: the number of the guniting openings is multiple.

5. The drill bit for the high-pressure jet grouting pile machine according to claim 1, characterized in that: the drill bit is detachably connected with the drill rod through a flange.

6. The drill bit for the high-pressure jet grouting pile machine according to claim 1, characterized in that: the air bag is made of rubber.

7. The drill bit for the high-pressure jet grouting pile machine according to claim 1, characterized in that: the pipeline is an air pipe or a water pipe.

8. The drill bit for the high-pressure jet grouting pile machine according to claim 1, characterized in that: the drill bit is used for being connected with a double-pipe high-pressure rotary jet pile machine or a triple-pipe high-pressure rotary jet pile machine.

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