CN203684207U

CN203684207U - Pipe-sinking soil withdrawal cast-in-situ rectangular support pile concrete diaphragm wall

Info

Publication number: CN203684207U
Application number: CN201320760783.4U
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: 2014-07-02
Anticipated expiration: 2023-11-20

Abstract

The utility model discloses a pipe-sinking soil withdrawal cast-in-situ rectangular support pile concrete diaphragm wall, which is characterized in that soil is withdrawn through parallel sinking pipes on the outer side of a foundation pit; cast-in-situ rectangular-section reinforced concrete support piles and 1-4 rows of overlapped cement stirring piles or cement jet grouting piles construct a combined concrete diaphragm wall; the long sides of the cross section of each rectangular support pile are 600-1,200 millimeters, the short sides are 200-700 millimeters, and the pile length is 10-35 meters; each cement stirring pile or cement jet grouting pile is 500-1,200 millimeters in diameter and 10-25 meters in pile length. Compared with the conventional foundation pit support scheme, the concrete diaphragm wall has the advantages of simple construction process, reduction of the using amount of concrete and steel by 30 percent, lowering of the engineering cost by 25 percent, and no slurry pollution, low noise, environmental friendliness and energy saving in construction, and is suitable for city construction in coastal soft soil areas in China.

Description

A kind of immersed tube cast-in-place rectangle soldier pile ground-connecting-wall that fetches earth

Technical field

The utility model relates to building foundation engineering field, relates in particular to a kind of immersed tube cast-in-place rectangle soldier pile ground-connecting-wall that fetches earth.

Background technology

At present, in the urban construction of China coast soft foundation, pattern foundation pit supporting structure more than cutting depth 5m, adopt bored piles, 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 is told us, equates when concrete section is long-pending, and 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 be fewer 30% than circular stake area, and amount of concrete is few 30%, and amount of reinforcement lacks 35%.

Utility model content

The purpose of this utility model is to provide a kind of immersed tube cast-in-place rectangle soldier pile ground-connecting-wall that fetches earth, and gear soil, water stopping function can be born in the lump, and the concrete and the rolled steel dosage that use than existing conventional pattern foundation pit supporting structure scheme reduce by 30%, and construction costs reduces by 25%.And in the utility model construction, soil compaction effect is Strong not, does not affect the safety of original network of underground and adjacent structure, construction also has mud-less pollution, low noise, environmental protection, energy-conservation.

The purpose of this utility model is achieved through the following technical solutions: a kind of immersed tube cast-in-place rectangle soldier pile ground-connecting-wall that fetches earth, it is characterized in that being fetched earth by immersed tube arranged side by side in foundation ditch outside, the steel concrete soldier pile of cast-in-place square-section, with the 1-4 row cement mixing pile of overlap joint or the combined type ground-connecting-wall of the common composition of cement rotary churning pile mutually, the transversal face length of rectangle soldier pile 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 cast-in-place rectangle soldier pile construction method for diaphragm walls that fetches earth, comprises the following steps:

(1) smooth location, cement mixing pile pier inside the mutual cement mixing pile water stopping curtain overlapping of foundation ditch outside construction 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 undergroundly to design elevation, then, propose inner tube, unload the soil in inner tube;

(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 to recovery;

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

The utility model is compared with existing conventional pattern foundation pit supporting structure scheme, have construction technology simple, the concrete of use and rolled steel dosage reduce by 30%, and construction costs reduces by 25%, in construction, mud-less pollution, 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 utility model.

Fig. 2 is floor map of the present utility model.

(a) be march-past rectangle soldier pile and cement mixing pile.

(b) be inserted in cement mixing pile for being total to row formula 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;

The specific embodiment

An exemplary embodiments of the present utility model is as Fig. 1, and its construction making flow process is as follows:

(1) smooth location, cement mixing pile pier (11) inside mutual cement mixing pile (6) water-stop curtain overlapping of foundation ditch outside construction 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 undergroundly to design elevation, then, propose inner tube, unload the soil in inner tube.

(3) in outer tube cavity, insert the rectangle reinforcing cage of being made by 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 cast-in-place rectangle soldier pile ground-connecting-wall that fetches earth, it is characterized in that being fetched earth by immersed tube arranged side by side in foundation ditch outside, the steel concrete soldier pile of cast-in-place square-section, with the 1-4 row cement mixing pile of overlap joint or the combined type ground-connecting-wall of the common composition of cement rotary churning pile mutually, the transversal face length of rectangle soldier pile 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.