CN2714628Y

CN2714628Y - Grouting device for improving bearing capacity of cast-in-situ concrete thin wall pipe pile

Info

Publication number: CN2714628Y
Application number: CN 200420078136
Authority: CN
Inventors: 刘汉龙; 费康; 马晓辉
Original assignee: SOIL AND ROCK ENGINEERING SCIENCE INST HEHAI UNIV
Current assignee: SOIL AND ROCK ENGINEERING SCIENCE INST HEHAI UNIV
Priority date: 2004-07-28
Filing date: 2004-07-28
Publication date: 2005-08-03
Anticipated expiration: 2014-07-28

Abstract

The utility model relates to a grouting device for improving bearing capacity of cast-in-situ concrete thin wall pipe pile, which is provided with a spirality grouting pipe along a big diameter cast-in-place concrete thin wall pipe pile double-layer sleeve pipe outer side, forming a horizontal grouting pipe at the double-layer sleeve pipe terminal. The spirality grouting pipe and the horizontal grouting pipe which are separately positioned on the inner and outer sides of the double-layer sleeve pipe are provided with a plurality of apertures. When the double-layer sleeve pipe sinks down into the preset foundations depth under the protecting of the valve pile shoes, the spirality grouting pipe conducts pressure grouting. The serous fluid injects into the earth body through the spirality grouting pipe and the horizontal grouting pipes positioned on the inner and outer sides of the double-layer sleeve pipe terminal and the apertures positioned on the horizontal grouting pipe, which forms an enlarging head of the pile terminal, adds the pile lateral frictional resistance and enhances the pile bearing capacity, therefore saving the engineering cost.

Description

Improve the provisions for grouting of cast-in-place concrete thin-walled pile tube bearing capacity

Technical field

The utility model relates to a kind of device that improves bearing capacity of pile foundation, particularly a kind of provisions for grouting that improves cast-in-place concrete thin-walled pile tube bearing capacity.

Background technology

The cast-in-place concrete thin-walled pile tube of major diameter is in practice of construction utilization, because the stake end is the opening stake, so its bearing capacity of pile foundation is affected, and potentiality are little, bring certain influence to design.

Summary of the invention

The purpose of this utility model just is to overcome above-mentioned defective, designs a kind of provisions for grouting that improves cast-in-place concrete thin-walled pile tube bearing capacity.

The technical solution of the utility model: the provisions for grouting that improves cast-in-place concrete thin-walled pile tube bearing capacity, its major technique is characterised in that the arranged outside spirality Grouting Pipe along cast-in-place concrete thin-walled pile tube bilayer sleeve, is communicated with to Grouting Pipe with level inside and outside the bilayer sleeve end.

Advantage of the present utility model and effect are that the pressure grouting of provisions for grouting has improved bearing capacity of pile tip effectively, and have increased the frictional resistance of stake side simultaneously, thereby have strengthened the quality of the cast-in-place concrete thin-walled pile tube of major diameter, have saved engineering cost.

Description of drawings

Fig. 1---the utility model longitudinal profile structural principle schematic diagram.

The terminal view in transverse section of Fig. 2---the utility model.

The specific embodiment

As shown in Figure 1, 2, the centre is the cast-in-place concrete thin-walled pile tube bilayer sleeve 1 of major diameter, the bottom is provided with flap valve shoe 2, in bilayer sleeve 1 outside spirality Grouting Pipe 3 is set longitudinally, arranged outside horizontal grouting pipe 4 in bilayer sleeve 1 lower end, rounded, wherein offered a plurality of apertures 5 on spirality Grouting Pipe 3, the horizontal grouting pipe 4, spirality Grouting Pipe 3 is communicated with horizontal grouting pipe 4.

During construction; the cast-in-place concrete thin-walled pile tube bilayer sleeve 1 of major diameter is lowered into the predetermined ground degree of depth in the protection of flap valve shoe 2; spirality Grouting Pipe 3 is carried out pressure grouting then; horizontal grouting pipe 4 and last aperture 5 thereof were injected in the soil body outside slurries were annotated in oar pipe 3 and the bilayer sleeve end by spirality; formed the enlarged footing of stake end; and increased the frictional resistance of stake side, improved the bearing capacity of stake.

Claims

1. improve the provisions for grouting of cast-in-place concrete thin-walled pile tube bearing capacity, it is characterized in that arranged outside spirality Grouting Pipe, offer a plurality of apertures on it along cast-in-place concrete thin-walled pile tube bilayer sleeve.

2. the provisions for grouting of the cast-in-place concrete thin-walled pile tube bearing capacity of raising according to claim 1 is characterized in that the spirality Grouting Pipe forms level to Grouting Pipe in cast-in-place concrete thin-walled pile tube bilayer sleeve end, offers a plurality of apertures on it.

3. according to the provisions for grouting of claim 1 and the cast-in-place concrete thin-walled pile tube bearing capacity of 2 described raisings, it is characterized in that level distributes to Grouting Pipe outside in the bilayer sleeve end.