CN205676911U

CN205676911U - A kind of skyscraper pipe pile foundation being applicable to weak soil place

Info

Publication number: CN205676911U
Application number: CN201620529127.7U
Authority: CN
Inventors: 江红军; 沈卫东
Original assignee: Suzhou Institute Of Planning And Design Co Ltd
Current assignee: Suzhou Institute Of Planning And Design Co Ltd
Priority date: 2016-06-03
Filing date: 2016-06-03
Publication date: 2016-11-09
Anticipated expiration: 2026-06-03

Abstract

The utility model discloses a kind of skyscraper pipe pile foundation being applicable to weak soil place, include successively from top to bottom: mixed layer, soft mud and hard stratum, it is provided with prefabricated tubular pile in described mixed layer, soft mud and hard stratum, described prefabricated tubular pile stretches into degree of depth D4 in hard stratum and is more than 2 meters, the thickness D2 of described mixed layer is more than 3 meters, at the reinforced bed that is provided above of described mixed layer, the top of prefabricated tubular pile is fixed by described reinforced bed.By the way, the utility model can have the place election use prefabricated tubular pile compared with deep soft clay at ground shallow, and avoids using in weak soil place occur inclined stake, the problem such as stake, broken pile in the work progress of prefabricated tubular pile.

Description

A kind of skyscraper pipe pile foundation being applicable to weak soil place

Technical field

The utility model relates to building field, particularly relates to a kind of skyscraper pile tube base being applicable to weak soil place Plinth.

Background technology

As people in the countryside constantly move to city, town site growing tension, the height of building is also increasingly Height, the subsoil that past multi-story structure commonly uses is inapplicable, and pile foundation is almost the essential side of all skyscrapers Case, according to pile installation, commonly use at present has prefabricated tubular pile and cast-in-plase pile.

In the south of the River etc. area due to lake, pond more, a lot of places shallow-layers of building have thicker soft mud, owing to becoming silted up The unfavorable factors such as dirt bed moisture content is high, intensity is low, mobility is big, existing pile tube code is mostly limited in this weak soil place and makes With prestressed concrete pipe pile, main cause is that prefabricated tubular pile diameter is little, cross section concrete is few, quantity of reinforcement is little, and weak soil can not have Effect limits the sidesway of stake, and stable, the shear resistance of pile body can not meet use and require, typically all selects showing of major diameter during design Pouring concrete bored concrete pile；Even if there being part to select to use prefabricated tubular pile, soft soil foundation is not treated, can be when excavation of foundation pit yet Through being commonly encountered inclined stake, the problem such as stake, broken pile of falling.

Problems of the prior art have 2 points: 1. can not have at ground shallow makes compared with the place election of deep soft clay With prefabricated tubular pile cheap, convenient, efficient, can only select to use cast-in-place large-diameter concrete bored concrete pile, thus bring construction week The unfavorable factors such as phase length, cost height, difficulty of construction mud contamination environment big, a large amount of, pile bearing capacity are low.

2. select to have at ground shallow to use prefabricated tubular pile compared with the place election of deep soft clay, through being commonly encountered partially during excavation Stake, the problem such as stake, broken pile of falling.

Utility model content

The utility model is mainly solving the technical problems that provide a kind of skyscraper pile tube base being applicable to weak soil place Plinth, can have at ground shallow and use prefabricated tubular pile compared with the place election of deep soft clay, and avoid using in weak soil place The work progress of prefabricated tubular pile occurs inclined stake, the problem such as stake, broken pile of falling.

For solving above-mentioned technical problem, the technical scheme that the utility model uses is: provide one to be applicable to weak soil The skyscraper pipe pile foundation in place, includes from top to bottom successively: mixed layer, soft mud and hard stratum, described mixed layer, Being provided with prefabricated tubular pile in soft mud and hard stratum, described prefabricated tubular pile stretches into degree of depth D4 in hard stratum and is more than 2 meters, described The thickness D2 of mixed layer is more than 3 meters, and at the reinforced bed that is provided above of described mixed layer, described reinforced bed is by prefabricated tubular pile Top fix.

Preferably, degree of depth D3 of described reinforced bed is in the range of 16 ~ 30cm.

Preferably, degree of depth D3 of described reinforced bed is 20cm.

Preferably, it in described prefabricated tubular pile, is filled with armored concrete fill core.

Preferably, described armored concrete fills the concrete in core and uses C50 high-strength concrete.

Preferably, described reinforced bed uses 6mm reinforced mesh.

The beneficial effects of the utility model are: the 1st, prefabricated tubular pile short construction period, the work that construction bored concrete pile completes for month Cheng Liang, if converted to prefabricated tubular pile only needs just can complete for 2 days, improves efficiency of construction；2nd, prefabricated tubular pile cost is low, same to sample ruler A very little pile, bored concrete pile cost than prefabricated tubular pile expensive about 50%, and survey bearing capacity not as prefabricated tubular pile high；3rd, prefabricated pipe Stake pile quality is good, because using factorial praluction, and product percent of pass almost 100%, and bored concrete pile is at underground construction, quality is difficult With monitoring；4th, prefabricated tubular pile easy construction, environmental protection, and bored concrete pile needs field fabrication material, operation is loaded down with trivial details, and produces a large amount of Mud contamination environment.

Brief description

Fig. 1 is the structure of a kind of skyscraper pipe pile foundation one preferred embodiment being applicable to weak soil place of the utility model Schematic diagram；

In accompanying drawing, the mark of each parts is as follows: the 1st, mixed layer, the 2nd, soft mud, the 3rd, hard stratum, the 4th, prefabricated tubular pile, the 5th, arrangement of reinforcement Bed course, the 6th, reinforcing bar.

Detailed description of the invention

Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model Can be easier to be readily appreciated by one skilled in the art with feature, thus protection domain of the present utility model is made apparent clearly Define.

Referring to Fig. 1, the utility model embodiment includes:

A kind of skyscraper pipe pile foundation being applicable to weak soil place, includes from top to bottom successively: mixed layer the 1st, silt soil Layer 2 and hard stratum 3, be provided with prefabricated tubular pile 4, described prefabricated tubular pile 4 in described mixed layer the 1st, soft mud 2 and hard stratum 3 Stretching into degree of depth D4 in hard stratum 3 is 2 meters, and the thickness D2 of described mixed layer 1 is 3 meters, being provided above of described mixed layer 1 Reinforced bed 5, the top of prefabricated tubular pile 4 is fixed by described reinforced bed 5.

Construction method of the present utility model is as follows: the first, basement process: fill soft mud 2 top mud and cement Dividing stirring, under basis, about 3m scope forms a mixed layer 1；2nd, drive piles；3rd, basement process and piling is opened after completing Dig to stake top mark relative superiority or inferiority 30cm, then do the thick reinforced bed 5 of a 20cm；4th, carry out to prefabricated tubular pile 4 filling core, typically require Filled 2 times 2m of soft mud, and vertical compression intensity in soft mud 2 for the prefabricated tubular pile 4, shearing strength can be increased and resist Curved intensity.

Soft mud 2 top mud and cement are first sufficiently stirred for by the utility model, about 3m scope under basis Forming a mixed layer 1, the effect of this mixed layer 1 is the computational length that can reduce prefabricated tubular pile in soft mud 2, makes stake Bearing capacity reducing coefficient increase；Mixed layer 1 can also limit prefabricated tubular pile 4 head sidesway, is similar to original unstrained pile Head is to fixing transformation, and this also can increase bearing capacity reducing coefficient；Owing to skyscraper has elevator foundation pit, in mixed layer 1 Excavation pit will not occur phenomenon of caving in, and also will not produce soil body flow and cause inclined stake, stake, pile breaking phenomenon；Mixed layer 1 is also Movement and the construction of engineering machinery can be facilitated.

Further, described reinforced bed 5 can link together all prefabricated tubular pile 4 pile crowns, in excavation hole during hole Prefabricated tubular pile 4 would not be subjected to displacement, it is ensured that the perpendicularity of stake.

The foregoing is only embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model, every Utilize the equivalent structure that the utility model specification and accompanying drawing content made or equivalence flow process conversion, or be directly or indirectly used in Other related technical fields, all in like manner include in scope of patent protection of the present utility model.

Claims

1. the skyscraper pipe pile foundation being applicable to weak soil place, it is characterised in that include successively from top to bottom: mixing Layer, soft mud and hard stratum, be provided with prefabricated tubular pile, described prefabricated pipe in described mixed layer, soft mud and hard stratum Stake is stretched into degree of depth D4 in hard stratum and is more than 2 meters, and the thickness D2 of described mixed layer is more than 3 meters, sets above described mixed layer Being equipped with reinforced bed, the top of prefabricated tubular pile is fixed by described reinforced bed.

2. a kind of skyscraper pipe pile foundation being applicable to weak soil place according to claim 1, it is characterised in that described Degree of depth D3 of reinforced bed is in the range of 16 ~ 30cm.

3. a kind of skyscraper pipe pile foundation being applicable to weak soil place according to claim 2, it is characterised in that described Degree of depth D3 of reinforced bed is 20cm.

4. a kind of skyscraper pipe pile foundation being applicable to weak soil place according to claim 1, it is characterised in that in institute It is filled with armored concrete in stating prefabricated tubular pile and fill core.

5. a kind of skyscraper pipe pile foundation being applicable to weak soil place according to claim 4, it is characterised in that described Armored concrete fills the concrete in core and uses C50 high-strength concrete.

6. any one according to claim 1 or 2 or 3 is applicable to the skyscraper pipe pile foundation in weak soil place, its feature Being, described reinforced bed uses 6mm reinforced mesh.