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Down-the-hole hammer and guide hole matched construction method for vibro-replacement stone column composite foundation

A technology for vibrating crushed stone piles and composite foundations, which is applied in infrastructure engineering, soil protection, construction, etc., can solve problems such as inability to meet construction requirements, achieve uneven settlement of foundations, reduce construction costs, and eliminate earthquake liquefaction. Effect

Inactive Publication Date: 2016-08-17
BEIJING VIBROFLOTATION ENG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the traditional vibrating gravel pile method is applicable to most geological conditions, for this special stratum environment, it is necessary to penetrate the backfilled mountain riprap stratum first in the process of hole formation, and the existing vibrating method can no longer meet this requirement. Construction requirements for special geological conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for constructing a composite foundation of a vibro-crushed stone pile with a down-the-hole hammer combined with a pilot hole, specifically comprising the following steps,

[0043] 1. Lead hole: According to the pile point set by the foundation, use the pneumatic down-the-hole hammer to penetrate the mountain riprap stratum and establish the lead hole;

[0044] 2. Move the machine: After a lead hole is established at a certain pile point, move the DTH hammer drilling rig to the next pile point, and continue to build the lead hole;

[0045] 3. Hole alignment: After establishing the pile point after the lead hole, let the vibro-pile machine be in place and place the vibrator into the lead hole;

[0046] 4. Hole forming: control the high-pressure water pump and vibrating device and form the hole to the set depth, where the water pressure is 0.4Mpa, and the vibrating hole-forming current is 50A;

[0047] 5. Cleaning the hole: first lift the vibrator out of the orif...

Embodiment 2

[0052]A method for constructing a composite foundation of a vibro-crushed stone pile with a down-the-hole hammer combined with a pilot hole, specifically comprising the following steps,

[0053] 1. Lead hole: According to the pile point set by the foundation, use the pneumatic down-the-hole hammer to penetrate the mountain riprap stratum and establish the lead hole;

[0054] 2. Move the machine: After a lead hole is established at a certain pile point, move the DTH hammer drilling rig to the next pile point, and continue to build the lead hole;

[0055] 3. Hole alignment: After establishing the pile point after the lead hole, let the vibro-pile machine be in place and place the vibrator into the lead hole;

[0056] 4. Hole forming: Control the high-pressure water pump and the vibrating device and form the hole to the set depth. The water pressure is 0.5Mpa, and the vibrating hole-forming current is 50A;

[0057] 5. Cleaning the hole: first lift the vibro-punch out of the orif...

Embodiment 3

[0062] A method for constructing a composite foundation of a vibro-crushed stone pile with a down-the-hole hammer combined with a pilot hole, specifically comprising the following steps,

[0063] 1. Lead hole: According to the pile point set by the foundation, use the pneumatic down-the-hole hammer to penetrate the mountain riprap stratum and establish the lead hole;

[0064] 2. Move the machine: After a lead hole is established at a certain pile point, move the DTH hammer drilling rig to the next pile point, and continue to build the lead hole;

[0065] 3. Hole alignment: After establishing the pile point after the lead hole, let the vibro-pile machine be in place and place the vibrator into the lead hole;

[0066] 4. Hole forming: Control the high-pressure water pump and the vibrating device and form the hole to the set depth. The water pressure is 0.6Mpa, and the vibrating hole-forming current is 50A;

[0067] 5. Cleaning the hole: first lift the vibro-punch out of the ori...

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Abstract

The invention discloses a construction method of a vibro-impact gravel pile composite foundation with a down-the-hole hammer combined with a pilot hole, comprising the following steps: 1. Leading hole: using a pneumatic down-the-hole hammer to penetrate the mountain riprap stratum to establish a leading hole; 2. 1. Move the machine: After establishing the lead hole at a certain pile point, move the down-the-hole hammer drilling rig to the next pile point, and continue to build the lead hole; Introducing the hole; 4. Forming the hole: control the high-pressure water pump and the vibrating device and forming the hole to the set depth; 1.0 ~ 1.5m away from the bottom of the hole; 6. Filling: put gravel into the hole one by one, and carry out vibratory compaction; 7. Pile formation: repeat step 6 until the filler is densified to the top of the pile; 8. Follow steps 1 to 7 , until all the set pile points of the foundation are finished making piles. The invention has the advantages of simple process, convenient operation and fast construction speed, and can increase the bearing capacity of the foundation by 3 to 5 times.

Description

technical field [0001] The invention relates to a building construction method, in particular to a construction method of a vibrating gravel pile composite foundation using a down-the-hole hammer to cooperate with a pilot hole. Background technique [0002] Vibrating gravel pile method (also known as vibrating method) is a commonly used method in the treatment of soft ground, and is suitable for the reinforcement of gravel soil, sandy soil, silt soil, cohesive soil, artificial filling soil and collapsible soil. deal with. At present, the vibrating method has the advantages of mature technology, convenient material acquisition and simple construction, and can meet the construction requirements of most geological conditions. [0003] In our coastal cities, due to the decreasing amount of available natural land, the local area has adopted the method of land reclamation to solve the problem of land shortage. Since a large part of the rocks used for reclamation comes from the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/08
CPCE02D3/08
Inventor 张广彪朱晓勇
Owner BEIJING VIBROFLOTATION ENG MACHINERY
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