CN103981858A - Anti-tilt pipe piles protected by latticed cement-soil continuous walls and construction method thereof - Google Patents

Abstract

The invention provides anti-tilt pipe piles protected by latticed cement-soil continuous walls. The anti-tilt pipe piles are characterized in that one to two rows of cement-soil continuous walls consisting of cement jet-grouting piles or cement stirring piles and being connected in a string bead type are arranged between the adjacent pipe piles; two to five rows of cement jet-grouting piles or cement stirring piles are arranged in a passive soil area on each of the inner sides of a foundation pit; the pipe piles, the cement jet-grouting piles or the cement stirring piles are 400-1000mm in diameter; the cement jet-grouting piles or the cement stirring piles are 3-16m in length. When the anti-tilt pipe piles are compared with the prior art, under the circumstance of only adding the low-cost cement-soil continuous walls, the tilt, displacement and breakage of pile bodies of the pipe piles can be effectively prevented; the safety of high-cost project pile foundations is guaranteed; therefore the anti-tilt pipe piles are applicable for constructional pile foundation projects in the coastal reclamation regions of our country.

Description

A kind of anti-inclination pile tube and engineering method thereof of latticed cement soil continuous wall protection

Technical field

The present invention relates to building foundation field, relate in particular to a kind of anti-inclination pile tube and engineering method thereof of latticed cement soil continuous wall protection.

Background technology

Along with China's urban construction scale constantly expands, and the red line in 1,800,000,000 mu of farmlands drumming in of State Council is not allowed the state basic policy of invading, town site growing tension.Especially the coastal cities of China's an inch of land is an inch of gold, have to reclaim fields from the sea.First in bay, erect one dykes and dams, then the ooze hydraulic reclamation outside dykes and dams made to ground in dike, then mould shape at this huge thick stream owe on fixed mud backfill one to several meters of thick dregs, and plan, promote trade and investment, design, construct according to each plot difference in functionality.Owe fixed mud or the stream pile foundation of constructing on mud at this, have very large danger, owner, again often in line with reducing investment outlay, the reduction of erection time, does not adopt cost to double, but be difficult for causing the bored pile of pile body inclination, displacement, fracture in excavation of foundation pit.But adopt, cost is low, the construction period is short, the pile tube of mud-less pollution, often causes the inclination of pile tube pile body, displacement, fracture in excavation of foundation pit.Wenzhou Rui'an City refuse-burning plant was built on the arable land of enclosing and cultivating for 1958 as 2011, and the pile tube pile foundation that cost is 1,000,000 yuan most of inclination, displacement, fracture in excavation of foundation pit, have to all scrap.Redesign, construction drill castinplace pile, the construction period has dragged 1 year, and direct losses reach ten million yuan.Nowadays, the pile foundation of pile tube as building generally designed again near the Zao Di new district of in recent years enclosing and cultivating this refuse-burning plant.

Summary of the invention

The invention provides a kind of anti-inclination pile tube and engineering method thereof of latticed cement soil continuous wall protection, in excavation of foundation pit and construction, can economically, effectively prevent pile tube inclination, displacement, fracture.

The technical solution adopted in the present invention is: a kind of anti-inclination pile tube of latticed cement soil continuous wall protection, it is characterized in that, between adjacent pile tube, be provided with the cement soil continuous wall that 1-2 arranges the beading connection being made up of cement rotary churning pile or cement mixing pile, the district of being broken ground in foundation ditch inner side is provided with 2-5 draining mud rotary churning pile or cement mixing pile, pile tube, cement rotary churning pile or cement mixing pile stake footpath 400-1000mm, cement rotary churning pile or the long 3-16m of cement mixing pile stake, concrete or the steel concrete of cast height 3-15m in the pile tube tube chamber of near surface one to two joint, or near surface one root canal pile tube wall thickening 5-10cm.In the pile tube on foundation ditch limit or the new district of hydraulic fill sea mud recently, the cement rotary churning pile linking between pile tube or cement mixing pile are 2-3 row.Pipe pile length described herein reports according to geological mapping, by designing unit according to Specification Design.

A construction method for the anti-inclination pile tube of latticed cement soil continuous wall protection, comprises the following steps:

1., commercially available pile tube is transported to job site;

2., press figure injection pile tube by pile driver,, for reducing soil compaction effect, adopt and beat every 1 to 3 jumping;

3., between adjacent pile tube and foundation ditch inner side by the district of breaking ground, by jet grouting pile driving machine or mixing pile machine construction cement rotary churning pile or cement mixing pile diaphragm wall;

4., press designing requirement fluid concrete or steel concrete in tube chamber on pipe pile top.

A kind of anti-inclination pile tube of latticed cement soil continuous wall protection compared with prior art, there is obvious superiority, can, in the case of only increasing the cement soil continuous wall that expense is not high, just can effectively prevent the inclination of pile tube pile body, displacement and fracture, ensure the high engineering pile foundation safety of cost.The present invention is applicable to China's regional building pile foundation engineering of reclaiming fields from the sea.

Below in conjunction with accompanying drawing 1 and specific embodiment, the invention will be further described.

Brief description of the drawings

Fig. 1 is embodiment of the present invention schematic diagram.

Drawing explanation: 1. pile tube, 2. cement rotary churning pile or cement mixing pile.

Detailed description of the invention

If Fig. 1 is exemplary embodiments of the present invention, commercially available Φ 600 pile tubes (1) are transported to job site, and by the piling foundation plan of design, pile driver adopts and jumps the construction technology of beating every 1 root canal pile (1), reduces soil compaction that piling causes, crowded effect (soil compaction effect and pile spacing square be inversely proportional to).And between pile tube by jet grouting pile driving machine construction Φ 600 diameter cement rotary churning piles (2), effective length 5m (basement height subtracts 0.5m for empty stake, not cementing), overlaps 10cm between adjacent cement rotary churning pile (2).The district's 4 draining mud rotary churning piles (2) of constructing of being broken ground along foundation ditch inner side.

Claims (2)

1. the anti-inclination pile tube of a latticed cement soil continuous wall protection, it is characterized in that, between adjacent pile tube, be provided with the cement soil continuous wall that 1-2 arranges the beading connection being made up of cement rotary churning pile or cement mixing pile, the district of being broken ground in foundation ditch inner side is provided with 2-5 draining mud rotary churning pile or cement mixing pile, pile tube, cement rotary churning pile or cement mixing pile stake footpath 400-1000mm, cement rotary churning pile or the long 3-16m of cement mixing pile stake, concrete or the steel concrete of cast height 3-15m in the pile tube tube chamber of near surface one to two joint, or near surface one root canal pile tube wall thickening 5-10cm.

2. a construction method for the anti-inclination pile tube of latticed cement soil continuous wall protection, comprises the following steps:

1., commercially available pile tube is transported to job site;

2., press figure injection pile tube by pile driver,, for reducing soil compaction effect, adopt and beat every 1 to 3 jumping;

3., between adjacent pile tube and foundation ditch inner side by the district of breaking ground, by jet grouting pile driving machine or mixing pile machine construction cement rotary churning pile or cement mixing pile diaphragm wall;

4., press designing requirement fluid concrete or steel concrete in tube chamber on pipe pile top.