CN104652420A

CN104652420A - Sinking pipe soil withdrawing and cast-in-place rectangular supporting pile diaphragm wall and construction method thereof

Info

Publication number: CN104652420A
Application number: CN201310613611.9A
Authority: CN
Inventors: 金国平; 钱圣德
Original assignee: WENZHOU CHANGCHENG FOUNDATION ENGINEERING Co Ltd
Current assignee: WENZHOU CHANGCHENG FOUNDATION ENGINEERING Co Ltd
Priority date: 2013-11-20
Filing date: 2013-11-20
Publication date: 2015-05-27

Abstract

The invention provides a sinking pipe soil withdrawing and cast-in-place rectangular supporting pile diaphragm wall. The sinking pipe soil withdrawing and cast-in-place rectangular supporting pile diaphragm wall is characterized in that a combined diaphragm wall is arranged at the outer side of a foundation pipe, wherein the combined diaphragm wall comprises a parallel, sinking pipe soil withdrawing and cast-in-place reinforced concrete supporting piles with rectangular sections and 1 to 4 rows of lapped cement mixing piles or cement jet grouting piles; the long side of the rectangular cross section of each supporting pile is 600 to 1200mm, the short side is 200 to 700mm, and each pile is 10 to 30m in length; each cement mixing pile or cement jet grouting pile is 500 to 1200mm in diameter and 10 to 25m in length. Compared with the existing general foundation pit supporting scheme, the method has the advantages that the construction process is simple; the quantity of used concrete and steel is reduced by 30%, the construction cost is reduced by 25%, the construction is free of slurry pollution, the noise is low, the environment is protected, the energy is saved, and the urban construction in coastal soft soil regions is met.

Description

A kind of immersed tube fetches earth cast-in-place rectangle soldier pile ground-connecting-wall and construction method thereof

Technical field

The present invention relates to building foundation engineering field, particularly relate to a kind of immersed tube and to fetch earth cast-in-place rectangle soldier pile ground-connecting-wall and construction method thereof.

Background technology

At present, in the urban construction of China coast soft foundation, the pattern foundation pit supporting structure of more than cutting depth 5m, adopt bored pile, steel sheet pile, SMW engineering method, and steel concrete ground-connecting-wall makes pattern foundation pit supporting structure, its effect is pretty good more, also very safe, but construction costs is higher.

Design Code of Reinforced Concrete tells us, and when concrete section amasss equal, under reinforcement ratio same case, rectangular pile bending resistance is 1.5 times of cylinder pile bending resistance; The steel concrete of identical moment of flexure in other words, rectangular pile can than circular stake area few 30%, amount of concrete few 30%, amount of reinforcement few 35%.

Summary of the invention

A kind of immersed tube is the object of the present invention is to provide to fetch earth cast-in-place rectangle soldier pile ground-connecting-wall and construction method thereof, gear soil, water stopping function can be born in the lump, the concrete used than existing conventional foundation pit support plan and rolled steel dosage reduce by 30%, and construction costs reduces by 25%.And in the present invention's construction, soil compaction effect is Strong not, does not affect the safety of original network of underground and adjacent structure, construct and also there is mud-less pollution, low noise, environmental protection, energy-conservation.

The object of the invention is to be achieved through the following technical solutions: a kind of immersed tube fetches earth cast-in-place rectangle soldier pile ground-connecting-wall, it is characterized in that being fetched earth by immersed tube arranged side by side outside foundation ditch, the steel concrete soldier pile of cast-in-place square-section, the combined type ground-connecting-wall that the cement mixing pile that overlaps mutually or cement rotary churning pile form jointly is arranged with 1-4, rectangle soldier pile transversal face length limit 600-1200mm, minor face 200-700mm, the long 10-35m of stake; Cement mixing pile or cement rotary churning pile diameter 500-1200mm, the long 10-25m of stake.

A kind of immersed tube fetches earth cast-in-place rectangle soldier pile construction method for diaphragm walls, comprises the following steps:

(1) smooth location, cement mixing pile pier inside construct outside foundation ditch the cement mixing pile water stopping curtain overlapped mutually and foundation ditch;

(2) by vibrating hammer on pipeline sinking pile machine column, clad steel immersed tube (two tube pitch 5-15mm) vibration is sunk to underground to design elevation, then, in proposing, pipe, unloads the soil in interior pipe;

(3) in outer tube cavity, insert rectangle steel muscle cage, then to placing of concrete in pipe, make rectangle soldier pile;

(4) by the vibrating hammer on pipeline sinking pile machine column, outer steel immersed tube vibration is pulled up recovery;

(5) go round and begin again, complete the construction of all rectangle soldier piles, cement mixing pile and cement mixing pile pier.

The present invention is compared with existing conventional foundation pit support plan, have construction technology simple, the concrete of use and rolled steel dosage reduce by 30%, and construction costs reduces by 25%, mud-less pollution in construction, low noise, environmental protection, energy-conservation, be suitable for the urban construction of China coast soft clay area.

Accompanying drawing explanation

Fig. 1 is generalized section of the present invention.

Fig. 2 is floor map of the present invention.

A () is march-past rectangle soldier pile and cement mixing pile.

B () is inserted in cement mixing pile for being total to column rectangle soldier pile.

In figure: 1. miscellaneous fill layer, 2. ground level, 3. sprayed mortar, 4. concrete Guan Liang, 5. rectangle soldier pile, 6. cement mixing method, 7. foundation ditch, 8. inner support beam, 9. argillic horizon, 10. mud, 11. cement mixing pile piers, 12. hole end absolute altitudes, 13. fine steel ribs, 14. stirrups, 15. bar reinforcements;

Detailed description of the invention

An exemplary embodiments of the present invention is as Fig. 1, and its construction Making programme is as follows:

(1) smooth location, 2 rows mutually cement mixing pile pier (11) inside cement mixing pile (6) water-stop curtain of overlap joint and foundation ditch of constructing outside foundation ditch;

(2) by vibrating hammer on pipeline sinking pile machine column, clad steel immersed tube (two tube pitch 5-15mm) vibration is sunk to underground to design elevation, then, in proposing, pipe, unloads the soil in interior pipe.

(3) in outer tube cavity, insert the rectangle reinforcing cage be made up of bar reinforcement (13), fine steel rib (15) and stirrup (14), then to placing of concrete in pipe, be made into rectangle soldier pile (2);

Claims

1. an immersed tube fetches earth cast-in-place rectangle soldier pile ground-connecting-wall, it is characterized in that being fetched earth by immersed tube arranged side by side outside foundation ditch, the steel concrete soldier pile of cast-in-place square-section, the combined type ground-connecting-wall that the cement mixing pile that overlaps mutually or cement rotary churning pile form jointly is arranged with 1-4, rectangle soldier pile transversal face length limit 600-1200mm, minor face 200-700mm, the long 10-35m of stake; Cement mixing pile or cement rotary churning pile diameter 500-1200mm, the long 10-25m of stake.

2. immersed tube fetches earth a cast-in-place rectangle soldier pile construction method for diaphragm walls, comprises the following steps:

(1) smooth location, the 1-4 that constructs outside foundation ditch arranges cement mixing pile pier inside the cement mixing pile water stopping curtain of mutually overlap joint and foundation ditch;