CN1136623A

CN1136623A - Punched pressure-pipe type rammed rubble pile construction method

Info

Publication number: CN1136623A
Application number: CN 96101736
Authority: CN
Inventors: 赵德连; 肖炳成; 高国强
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-30
Filing date: 1996-01-30
Publication date: 1996-11-27
Anticipated expiration: 2016-01-30
Also published as: CN1053723C

Abstract

The ramming construction method of rubble pile is composed of the following steps: position-fixing and staking out; putting ram machine in place; ram impaction in the pile tube makes the ram bottom extend out from tube bottom excess 0.5-1 m; using ram impact pile tube to bottom of the hole punched by ram; repeatedly impacting pressure tube to required depth, finally repeatedly pulling tube, filling block material, compacting to complete pile-making. It has the advantages of low cost, high pile quality, low noise and less mechanical equipment.

Description

Punched pressure-pipe type rammed rubble pile construction method

Common broken stone pile used in engineering, the flange foundation pile all is with hammering or the punching of shaking pile pipe to be sunk behind 0.5～1.0m place, pile pipe bottom system one stone plug, and is rubble with material, by squeezed pile, these two kinds of methods will could be implemented with large equipment, and the construction costs height.

The objective of the invention is to design a kind of large equipment that do not need, cost is low, the punched pressure-pipe type rammed rubble pile construction method that quality is high.

Technical scheme of the present invention is: remove the sizing unwrapping wire, outside the pile-forming machine perching preparatory process, also be made up of following job practices:

A, soil compaction pore-forming: the pile monkey of slinging makes it come and go impact in pile pipe, exceeds pile pipe bottom certain depth to the pile monkey bottom.

B, pressure are bombarded and sink pipe: sink to the bottom, hole that pile monkey has rushed with the urgent just pile pipe of pile monkey, repeat A and B step until immersed tube arrives projected depth.

C, compaction in layers: lifting pile pipe certain altitude forms the space that feeds intake, and throws in bulk material in pipe, reaches design density while feeding intake with the pile monkey repeated stock, repeats then to carry to manage → feed intake → tamp the step several until the system stake is complete.

Certain depth described in the A step is 0.5～1.0m, and the certain altitude described in the C step is 0.3～0.8m, and bulk material is special hard stone or other material that is equal to special hard stone, and its piece directly is 0.20～0.30m.

Special-effect of the present invention is:

1, with pile monkey punching pressure pipe disposal pore-forming, need not drilling tool, without chock plug, thereby can make construction sequence simple, convenient, improve work efficiency.

2, pile pipe is open type, and pile monkey directly rushes soil, and penetration resistance is little, noise is little, the vibration is little, little to ambient influnence.The injection energy is big, can pass through boulder bed, and running into erratic boulder can directly brokenly squeeze it in hole perisporium place.

3, in ramming pore forming process, with tup soil is extruded into around the hole wall, make all soil of stake obtain ground extruding, thereby can prevent from effectively to collapse hole, shrinkage cavity, make the quality of stake mention assurance.

4, this use equipment is little, and mechanical quantity is few, can construct in narrow place (be better than Frank drive piles method stake machine and flange base piling method stake machine).

5, this cost is low.Pile shaft material adopts special hard rubble (cost is lower than rubble), can take full advantage of local resources, thereby has reduced construction costs.The good endurance of rubble, intensity height, thus the sanction power of holding of stake is improved greatly.

6, have displacement and compacted and function, form the rubble pile composite foundation.Obvious to the soft foundation treatment effect, and cost is low, economic benefit is very remarkable.

Embodiment: (with reference to Fig. 1--Fig. 5)

The location unwrapping wire: the construction site is smooth good, put fixed stake position by construction drawing.

Pile-forming machine perching: the facility of will driving piles assemble the stake position place that moves to regulation, with pile pipe centrally aligned stake position, stand on ground and depend on the mobile jib of piling machine.

Soil compaction pore-forming: put into pile pipe with hoist engine by the steel wire rope pile monkey of slinging, pile monkey is come and gone in pile pipe impact, until the pile monkey bottom exceeds 0.5～1 meter (Fig. 1) in pile pipe bottom.

Pressure is bombarded and sink pipe.Penetrate in the special hole, pile monkey top with the steel casting rod of a Gent system and to be pressed in the pile pipe top, (when meeting obstructions to sink in sinking such as pile pipe, hitting the piling pipe with pile monkey again) forces pile pipe to sink to the bottom, hole (Fig. 2) that pile monkey has rushed

Bombard and sink pipe until design supporting course place (Fig. 3) such as the above-mentioned impact that moves in circles, pressure.

Compaction in layers.Form the space that feeds intake with promoting about 0.5 meter (also available pile monkey add rush certain depth) to the pile pipe of supporting course.(bulk material is special hard stone or other material that is equal to special hard stone to throw in bulk material in the stake pipe, the piece footpath is at 200～300mm, can put into dry mortar simultaneously when groundwater run off is big), filler limit, limit is downwards with the hammer repeated stock, reaches (Fig. 4) till the design compactness always.And then pile pipe promoted about 0.5 meter (fixed depending on geological conditions), feed intake again impact → tamp → proposing the pipe layering that moves in circles carries out until make complete.Namely form " punched pressure-pipe type rammed rubble stake " (Fig. 5), telephone-moving is to lower foundation again.

The layering filling tamped is the key point of system stake, and a pile body compactness and a compacted effect of all soil are had decisive influence.Should pass through test pile, carry out every section of choose reasonable according to the size in the length of soil layer property and stake, stake footpath and put forward pipe height, filler quantity, impact the parameter such as inferior, height of the fall, to guarantee quality of pile processed.

For pile body and all soil of stake that guarantees bottom of foundation place has enough packings, stake top mark height should be exceeded 0.5～0.8 meter of the bottom of foundation, (also can be flat with the bottom of foundation, but must with the general rammer of little hammer ram one time), superelevation pile body partly digs flat when foundation construction.

Claims

1. a punched pressure-pipe type rammed rubble pile construction method comprises the location unwrapping wire, and the pile-forming machine perching step is characterized in that being made up of following job practices:

A, soil compaction pore-forming: the pile monkey of slinging makes it come and go impact in pile pipe, exceeds pile pipe bottom certain depth to the pile monkey bottom,

B, pressure are bombarded and sink pipe: force pile pipe to sink to the bottom, hole that pile monkey has rushed with pile monkey, repeat A and B step until immersed tube arrives projected depth,

2, a kind of punched pressure-pipe type rammed rubble pile construction method according to claim 1, it is characterized in that: the certain depth described in the A step is 0.5～1.0m, certain altitude described in the C step is 0.3～0.8m, bulk material is special hard stone or other material that is equal to special hard stone, and its piece directly is 0 20～030m.