CN1364961A

CN1364961A - Foundation reinforcing mode

Info

Publication number: CN1364961A
Application number: CN 02104259
Authority: CN
Inventors: 王光明; 王恩远
Original assignee: WANG GUANGMIGN
Current assignee: WANG GUANGMIGN
Priority date: 2002-02-28
Filing date: 2002-02-28
Publication date: 2002-08-21

Abstract

The foundation reinforcing method for loose and soft soil includes depositing straight sunken tube into loose and soft soil through vibration or other process, throwing stuffing, such as sand and stone, mine refuse, clay, etc. mixed with cement and water, into the sunken tube, hammering to density and form piles, and final spreading stuffing cushion in the top of the piles to form composite foundation with high strength cement piles. The method is simple in construction and low in cost, and has wide application range and no environmental pollution.

Description

A kind of foundation reinforcement method

Technical field

The present invention relates to a kind of foundation reinforcement method that is used for soft soil horizon.

Background technology

At present in construction work, processing to soft foundations such as mud, mucky soil, loosening sand, silt, cohesive soil, plain fill, miscellaneous fills, except that adopting pile foundation, still can adopt vertical enhancing bluk recombination ground to carry out consolidation process, the vibrosinking pile method is particularly arranged, the sand-gravel pile method, CFG method, cement-soil paddling process etc.But existing pile reinforcement means such as the disclosed construction technology of Chinese patent CN1153847A " a kind of concrete pipe base construction technology and equipment " have following steps: the pore-forming of A. pile body and last load dish, the making of B, force-bearing table, C, the making of load dish down, D, descending reinforcing cage, the fluid concrete pile.The construction equipment of this pile foundation comprises casing, and there is the last load disc molding punch plate of a reverse frustoconic its stack shell upper end, places below the charge door.With the efficient compacted steel concrete bearing peg of this worker's method and equipment construction, bearing capacity is big, but construction the time need be adopted special casing, and needs dig a hole in advance on ground, and pile body is a steel concrete, and cost is higher, and influence is promoted the use of.The also many defectiveness of other worker's method.

Summary of the invention

The objective of the invention is to reinforce worker's method restricted application at existing pile, the pile quality instability, intensity is lower, construction technology equipment requires and the cost height, and the shortcoming of unfavorable popularization provides a kind of being applicable to reinforce various soft foundations, job practices is easy, do not need special equipment, cost is low, the foundation reinforcement method that consolidation effect is good.

Foundation reinforcement method of the present invention is as follows:

A, treating on the consolidated subsoil immersed tube to be inserted foundation soil to projected depth,

B, in immersed tube, drop into and have the filler of cement, and use the tamping pile,

C, extract immersed tube, pile body sclerosis back forms cement high bond strength pile composite foundation.

In the ground stabilization process, the filler that drops in immersed tube can be gathered materials on the spot, and adopts various sandstone material. the ore deposit quarrel. and native aggregate chips or clay.With the cement of going into be the 1/10-1/5 of filler weight, and mix the water of the 1/10-1/8 of filler weight.

For making immersed tube enter foundation soil, can the taper shoe be set in straight barrel type immersed tube lower end, vibration sinking tube makes it into foundation soil; Also can be at immersed tube lower end filling fragment of brick, impact in pipe with weight, form the brick plug that only becomes silted up after, continuation impact brick plug makes immersed tube fill in foundation soil with brick; Can also impact the foundation soil pore-forming with pile monkey in immersed tube, static pressure, immersed tube is gone into foundation soil simultaneously.

The pile mode both can be in immersed tube fed batch, the immersed tube pile is extracted in compaction in layers at last; Also can fed batch hammering in immersed tube, the layering tube drawing rams and expands pile.

After treating on the consolidated subsoil to make the stake of whole cement high bond strength by design stake position, can more than the design elevation of stake top, will make the filler mattress layer with the filler tiling compacting that cement and water are arranged, form cement high bond strength pile composite foundation.

This worker method is with simple and easy construction equipments such as straight barrel type immersed tube, post hammers, ramming the expansion filler by the post hammer obtains higher pile strength and enlarges the stake footpath, in formation of pile, inter-pile soil obtains compacted, thereby raising consolidation effect, because filler is interior and cement is arranged, thereby can solidify to form the high bond strength pile composite foundation.These worker's method materials are extensive, can gather materials on the spot, and cost is low, and the pile strength height does not have mud and discharges during construction, free from environmental pollution, has wide range of applications.

Description of drawings

The cement high bond strength pile composite foundation schematic diagram that Fig. 1 forms for foundation reinforcement method of the present invention

Fig. 2 is the immersed tube schematic diagram of band shoe

Fig. 3 is the immersed tube schematic diagram of band brick plug

Fig. 4 is the punching of post hammer, the static pressure, immersed tube schematic diagram that buries

Fig. 5 is a fed batch, and immersed tube pile schematic diagram is extracted in compaction in layers at last

Fig. 6 is a fed batch, hammering. the layering tube drawing. and ram and expand among the pile schematic diagram figure, 1 filler mattress layer, 2 cement high bond strength stakes, 3 soft foundations, 4 straight barrel type immersed tube, 5 shoes, 6 posts hammer, 7 brick plugs, 8 fillers, 9 rubbles

The specific embodiment

Arrange that the stake position inserts ground 3 to projected depth with immersed tube 4 waiting to reinforce on the soft foundation 3, generally can reach about 15 meters.The immersed tube mode can be following several one of.

A. in straight barrel type immersed tube 4 lower ends taper shoe 5 is set, vibrates 4 immersed tube then, make it to go deep into soft foundation soil 3,

B. impact earlier at immersed tube 4 lower end filling fragments of brick, and with post hammer 6, make fragment of brick jam-pack immersed tube 4 lower ends, form the brick plug 7 that only becomes silted up, continue impact brick plug 7 then, make immersed tube 4 enter foundation soil 3 with brick plug 7,

C. impact foundation soil 3 pore-formings with post hammer 6 in immersed tube 4, static pressure, immersed tube 4 enters foundation soil 3 simultaneously,

When immersed tube 4 enters foundation soil 3 to projected depth, in immersed tube 4, drop into filler 8 in batches, hammer 6 compactions in layers into shape with post, last tube drawing pile; Also can be in immersed tube 4 fed batch, hammering, layering tube drawing, compacting pile.Also can drop into rubble 9 rammer expansions before fed batch earlier in immersed tube 4 builds at the end.The filler 8 that drops in immersed tube 4 is gathered materials on the spot as far as possible, can be sandstone material, ore deposit quarrel, native aggregate chips, clay etc., simultaneously with the cement of going into to account for filler weight 1/10-1/5 and the water that accounts for filler weight 1/10-1/8, can also wait to reinforce more than the stake top design elevation of soft foundation 3 at last, will with the filler that cement and water are arranged, filler mattress layer 1 is made in the tiling compacting, thereby forms cement high bond strength pile composite foundation.

Claims

1, a kind of foundation reinforcement method is characterized in that:

A, treating on the consolidated subsoil immersed tube to be gone into foundation soil to projected depth,

B, in immersed tube, drop into and have the filler of cement and water, and use the tamping pile,

2, according to claim 1 described foundation reinforcement method, it is characterized in that the said filler that drops into is the sandstone material in immersed tube, or slag, or native aggregate chips, or clay and the cement of going into is the 1/10-1/5 of filler weight, mixes the water of filler weight 1/10-1/8 simultaneously.

3, according to claim 1 described foundation reinforcement method, it is characterized in that the said mode that immersed tube is sunk to foundation soil be following several one of:

A, the tapered pile boots are set under immersed tube, vibration sinking tube is gone into foundation soil;

B, at immersed tube lower end filling fragment of brick, form the brick plug that only becomes silted up with the post hammering blow, continue the impact brick plug, make immersed tube fill in foundation soil with brick;

C, in immersed tube with post hammering blow foundation soil pore-forming, simultaneously static pressure, immersed tube is gone into foundation soil.

4,, it is characterized in that described pile mode is one of following two kinds according to claim 1 or 3 described foundation reinforcement methods:

A, in immersed tube fed batch, the immersed tube pile is extracted in compaction in layers at last;

B, fed batch hammering in immersed tube, the layering tube drawing rams and expands pile.

5, according to claim 1 described foundation reinforcement method, base is characterised in that more than the design elevation of stake top will manufacture the filler mattress layer with the filler tiling compacting that cement and water are arranged, and form cement high bond strength pile composite foundation.