CN2381671Y

CN2381671Y - Boring bit for vibrating and jetting bored concrete piles

Info

Publication number: CN2381671Y
Application number: CN 99216926
Authority: CN
Inventors: 黄运飞
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-19
Filing date: 1999-07-19
Publication date: 2000-06-07
Anticipated expiration: 2009-07-19

Abstract

The utility model relates to a boring bit for vibrating and jetting bored concrete piles, which comprises cables, a concrete inlet pipe, a motor, a shaft coupling, a main shaft, eccentric blocks, a casing, a conical head with wings, a nozzle and a concrete stopping valve. The concrete inlet is connected with the nozzle by a steel pipe on the casing. The motor is connected with the main shaft by the shaft coupling. Two eccentric blocks are fixed on the main shaft. The lower end of the casing is connected with the conical head with wings. Hydraulic force and vibration force are effectively combined by the vibrating and jetting bit to enhance boring efficiency. Because the action of boring vibration to a soil body of a bore wall is equivalent to a soil extruding pile, the boring bit can enhance side friction resistance 30%. A boring process is simple without needing a large device. The utility model can be used for boring in any stratum (such as a pebble stratum, etc.) and have the advantage of high efficiency.

Description

Bored concrete pile shakes and is sprayed into drill

The utility model relates to a kind of Foundation Design mechanical device of fixed buildings, relates in particular to a kind of equipment in the squeezed hole of castinplace pile.Can realize making in the stratum (one-tenth) hole effectively.

Castinplace pile is to make (one-tenth) hole with machinery or manpower, and Xiang Kongzhong builds the stake that concrete or steel bar concrete become, in order to the supporting building load.In civil construction project, be used widely year history surplus China existing 100.

It is different with construction technology that castinplace pile is pressed the pore-forming method, mainly is divided into: 1. just (instead) circulation rotary drilling, and 2. auger boring (not having circulation), 3. immersed tube, 4. manually digging hole, 5. 6. impact holing dashes and grabs pore-forming.Each class methods can further be divided into group again.In a word, through the engineering practice over 100 years, developed a variety of pouring pile hole methods, they respectively have pluses and minuses, be applicable to different geological conditionss and building respectively, pore-forming mechanism is respectively machinery (manually) cutting, vibration is squeezed, impact is squeezed.As run into the subsurface geology condition difference of pore-forming, and then must be according to geological conditions exchange device more, this just makes the time, and the financial resources manpower causes significant wastage.

The purpose of this utility model is: the utility model combines the cutting power of thin jetting stream and the compacted power of vibration very dexterously, and having developed shakes is sprayed into hole equipment, can be implemented in the stratum most effectively and make (one-tenth) hole.

The utility model is achieved in that the spray drill bit that shakes mainly is made of inlet pipe, cable, motor, shaft coupling, main shaft, eccentric block, housing, band Ji nose cone, nozzle, grouting stop-valve.Inlet pipe directly communicates with nozzle by the steel pipe on the housing, and motor links by coupling and main shaft, and two eccentric blocks are fixed on the main shaft, and the housing lower end connects band Ji nose cone, and cable is connected with motor.

Shake be sprayed into hole equipment compared with prior art beneficial effect be:

(1), shake the spray drill bit organically fluid power and vibration force are combined, improved pore-forming efficiency greatly, under normal circumstances, all fast than alternate manner;

(2), because pore-forming vibration to the densification of the hole wall soil body, is equivalent to the soil compaction stake, can improve side friction about 30%;

(3), pore forming process is easy, need not main equipment;

(4), can be difficult to stratum (as boulder bed etc.) pore-forming of pore-forming and efficient height in other method.

Below in conjunction with accompanying drawing most preferred embodiment is described in detail:

Fig. 1 is the utility model internal construction schematic diagram

Fig. 2 is the utility model activities schematic diagram

As shown in Figure 1: inlet pipe 1 directly communicates with nozzle 9 by the steel pipe on the housing 7, and the band mud jacking liquid that the surface grout injection pump is discharged passes through grouting stop-valve 10, sprays into the soil body in vibration processes simultaneously, has both destroyed the soil body, is convenient to again creep into.Simultaneously, slurries are back to ground by the slit that shakes between spray drill bit and the boring, play the effect of retaining wall liquid.During vibration, the moment of torsion that motor 3 provides by shaft coupling 4, main shaft 5, pass to eccentric block 6, produce exciting force, by housing 7 squeezed compact earths, make (repairing) operation so that finish.Stable when the stratum, during no underground water, and only depend on vibratory compaction energy pore-forming, can spray without slurries.Cable 2 links to each other with motor 3, housing 7 lower ends, connection band Ji nose cone 8.

The following (see figure 2) of typical process process with the spray drill bit pore-forming that shakes.

(1) according to formation condition, the casing that on bore position, sinks (operation 6);

(2) the spray drill bit location (operation 11) that shakes;

(3) actuating motor and grouting pump (joining outward), limit vibration marginal not is gone into loop slurry or vibration (operation 12);

(4) the spray drill vibration (injection) that will shake sinks down into (operation 13) at the bottom of the hole;

(5) carry out vibratory compaction as required and repair hole (operation 14);

(6) will shake the spray drill bit in the hole, propose, finish pore-creating process (operation 15) and move to next boring.

The spray drill bit that shakes can link to each other with the lifting appliance on ground by steel pipe or wire rope.

Claims

A kind of bored concrete pile shakes and is sprayed into drill and comprises: cable, motor, coupling, main shaft, housing is characterized in that: the spray drill bit that shakes also comprises: inlet pipe, eccentric block, band Ji nose cone, nozzle, grouting stop-valve; Inlet pipe directly communicates with nozzle by the steel pipe on the housing, and motor links by coupling and main shaft, and two eccentric blocks are fixed on the main shaft, and the housing lower end connects band Ji nose cone, and cable is connected with motor, turns round with drive motors.