CN201321616Y

CN201321616Y - Deep foundation pit supporting, reinforcing, anti-seepage and waterproof structure

Info

Publication number: CN201321616Y
Application number: CNU2008202236502U
Authority: CN
Inventors: 罗照新; 李安洪; 周成; 宋成建; 吴沛沛; 丁兆锋
Original assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Priority date: 2008-12-23
Filing date: 2008-12-23
Publication date: 2009-10-07
Anticipated expiration: 2018-12-23

Abstract

The utility model discloses a deep foundation pit supporting, reinforcing, anti-seepage and waterproof structure which aims to ensure the safety of deep foundation pit operation, and effectively prevent underground water from being lost in a large scale and flowing into the foundation pit through a permeable layer after the foundation pit is dug. The structure comprises bored cast-in-situ piles (20), jet grouting piles (30), a supporting and reinforcing body (1), an anti-seepage base layer (40), and an anti-seepage foundation layer (50). The bored cast-in-situ piles (20) are distributed in the soil outside the side wall of the foundation pit in two lines; the jet grouting piles (30) are distributed behind the two lines of bored cast-in-situ piles (20) in a curtain shape, and the pile bodies go downwards through a permeable soil layer; the bottom plate (10) and two side walls (11, 12) of the supporting and reinforcing body (1) can form an overall reinforced concrete U-shaped groove, and the supporting and reinforcing body (1) is fixedly connected with the two lines of bored cast-in-situ piles (20) through the top beams (11a, 12a) of the two sidewalls (11, 12); the anti-seepage base layer (40) is arranged between the two sidewalls (11, 12) and the side wall of the foundation pit; and the anti-seepage foundation layer (50) is arranged between the bottom plate (10) and the bottom surface of the foundation pit.

Description

The deep pit support reinforcing anti-seepage water stop structure

Technical field

The retaining stabilization works that the utility model relates to, particularly a kind of support reinforcing anti-seepage water stop structure that is used for deep-foundation pit engineering.

Background technology

China can build world-class highly difficult building and structure, the construction that can under various complex engineering geology and hydrogeological situation, finish each class formation with construct.Follow the extensive construction of urban skyscraper, underground garage and subterranean railway etc. and the demand that the ground resource is made full use of, excavation pit has become inevitable, and the excavation scale trends towards more and more darker, increasing.The construction of various highrise buildings impels the appearance of some deep foundation ditchs, at present, based on deep-foundation pit engineering is a temporary works, safety stock is relatively low, but its technical sophistication, coverage is wide, and changing factor is many, so the security incident of deep foundation ditch occurs repeatedly at present, people also improve day by day to its attention degree.

Press the form difference of retaining wall, the main support form that adopts had steel sheet pile supporting and protection structure, castinplace pile supporting, deep-mixed pile supporting, diaphragm wall supporting etc. during engineering was used at present, had obtained under the site condition that wherein steel sheet pile supporting and protection structure is higher at soft foundation and groundwater table, the water yield is more using more widely.

But the advantage of steel sheet pile supporting and protection structure is not only can keep off soil but also dash, can be repeatedly used, set conveniently, and the bearing capacity height, stake is closely connected with soil, and hole wall land movement is little, and depression is also little.But construction noise is big, and vibration is big, and is big to the disturbance of the soil body, produces bigger distortion during construction, and is bigger to the influence of environment.Especially when foundation ditch bottom absolute altitude was positioned at the permeable soil body, a large amount of losses of excavation back underground water and underground water flowed into foundation ditch by pervious layer, can have a strong impact on follow-up construction operation.

The utility model content

Technical problem to be solved in the utility model provides a kind of deep pit support reinforcing anti-seepage water stop structure, this compound structure can not only be guaranteed the safety of deep foundation ditch operation, and can prevent effectively behind the excavation of foundation pit that underground water is a large amount of and run off and underground water flows in the foundation ditch by pervious layer.

The technical scheme that its technical problem that solves the utility model adopts is: deep pit support reinforcing anti-seepage water stop structure of the present utility model is characterized in that it comprises: bored pile is two row and is laid in respectively in the outer soil body of foundation pit side-wall; Rotary churning pile is the curtain shape and is laid in behind the two row bored piles and between stake, its pile body is passed down through permeable solum; Prop up retaining and add solid, by base plate and the integrant reinforced concrete structure U of twice abutment wall type groove, a retaining adds solid and fixedlys connected with two row bored piles respectively by the Guan Liang at twice abutment wall top; Antiseepage basic unit is arranged between twice abutment wall and the foundation pit side-wall; The antiseepage basal layer is arranged between base plate and the foundation ditch bottom surface.

The beneficial effects of the utility model are, by the reinforced concrete structure U type groove of integral body and the bored pile that connects as one as a shelves ruggedized construction, globality is strong, rigidity is big, the bearing capacity height can be guaranteed the safety of deep foundation ditch operation; Form water-stop curtain with rotary churning pile, the antiseepage basic unit that covers wall outside base plate and the twice abutment wall to link up, antiseepage basal layer are reinforced body to a retaining and are formed full face leakage preventing structure, therefore have water seepage prevention effect preferably; Disturbance to surrounding environment is little, and environmental problems such as vibration, noise are little, also can become the part of agent structure or architecture basics, helps reducing construction costs.

Description of drawings

This manual comprises following five width of cloth accompanying drawings:

Fig. 1 is the sectional schematic diagram of the utility model deep pit support reinforcing anti-seepage water stop structure;

Fig. 2 is the zoomed-in view of local A among Fig. 1;

Fig. 3 is the zoomed-in view of local B among Fig. 1;

Fig. 4 is the laying mode schematic diagram of bored pile and rotary churning pile in the utility model deep pit support reinforcing anti-seepage water stop structure;

Fig. 5 is the connected mode schematic diagram of adjacent two U type groove sections in the utility model deep pit support reinforcing anti-seepage water stop structure.

Parts shown in the figure, toponym and pairing mark: a retaining adds solid 1, U type groove sections 1a, U type groove sections 1b, base plate 10, abutment wall 11, hat beam 11a, abutment wall 12, hat beam 12a, reinforcing bar is worn pin 13, seamless steel pipe 14, bored pile 20, rotary churning pile 30, antiseepage basic unit 40, compounded rubber waterproof roll layer 41, layer of concrete 42, antiseepage basal layer 50, cement sand bed 52, hardcore bed 53, shrinkage joint 60, steel limit waterstop 61, mastic asphalt packing layer 62, bituminous wood filament plate packing layer 63, pitch hemp cut packing layer 64, bituminous wood filament plate packing layer 65.

The specific embodiment

Below in conjunction with accompanying drawing and example the utility model is further specified.

With reference to Fig. 1 and Fig. 4, deep pit support reinforcing anti-seepage water stop structure of the present utility model comprises: bored pile 20 is two row and is laid in respectively in the outer soil body of foundation pit side-wall; Rotary churning pile 30, after being the curtain shape and being laid in two row bored piles 20, its pile body is passed down through permeable solum; Prop up retaining and add solid 1, by base plate 10 and twice

abutment wall

11,12 integrant reinforced concrete structure U type grooves, a retaining adds solid 1 and fixedlys connected with two row bored piles 20 respectively by hat beam 11a, the 12a at twice

abutment wall

11,12 tops; Antiseepage basic unit 40 is arranged between twice

abutment wall

11,12 and the foundation pit side-wall; Antiseepage basal layer 50 is arranged between base plate 10 and the foundation ditch bottom surface.

In technique scheme, adopt bored pile 20 and rotary churning pile 30 as the interim space enclosing structure of foundation ditch, by interim the retaining stabilization works of bored pile 20 as excavation of foundation pit, rotary churning pile 30 is as interim water-stop curtain, bored pile 20 double as uplift pile simultaneously provides uplift resistance, increases the stability against floating that a retaining adds solid 1.

The utility model by the reinforced concrete structure U type groove of integral body and the bored pile that connects as one 20 as a shelves ruggedized construction, globality is strong, rigidity is big, the bearing capacity height can be guaranteed the safety of deep foundation ditch operation.Form water-stop curtain with rotary churning

pile

30,50 pairs retainings of antiseepage basic unit 40, the antiseepage basal layer that covers wall outside base plate and the twice abutment wall to link up are reinforced body and are formed full face leakage preventing structure, therefore have water seepage prevention effect preferably.In addition, little to the disturbance of surrounding environment, environmental problems such as vibration, noise are little, also can become the part of agent structure or architecture basics, thereby help reducing construction costs.

With reference to Fig. 2, described antiseepage basic unit 40 can be made of compounded rubber waterproof roll layer 41 and layer of concrete 42 usually, layer of concrete 42 as leveling layer is laid on the foundation pit side-wall, compounded rubber waterproof roll layer 41 is laid on

abutment wall

11,12 and layer of concrete 42 between, with reference to Fig. 3, described antiseepage basal layer 50 is usually by compounded rubber waterproof roll layer 41, cement sand bed 52, hardcore bed 53 constitutes, hardcore bed 53 is laid on the foundation ditch bottom surface, cement sand bed 52 is laid on the hardcore bed 53, compounded rubber waterproof roll layer 41 is laid between cement sand bed 52 and the base plate 10, on the

hardcore bed

53 and 52 smooth grounds of cement sand bed, the double effect of doing template.

With reference to Fig. 5, described retaining adds solid 1 by constituting along the vertical butted U-shaped groove of foundation ditch bearing of trend sections, and U type groove sections length is generally 10～20m, leaves shrinkage joint 60 between adjacent two U type groove sections 1a, the 1b, has leakage preventing structure in the shrinkage joint 60.Described leakage preventing structure generally includes from inside to outside bituminous wood filament plate packing layer 65, pitch hemp cut packing layer 64, bituminous wood filament plate packing layer 63, the mastic asphalt packing layer 62 of filling successively, and is embedded in steel limit waterstop 61 in adjacent two U type groove sections 1a, the 1b jointly along shrinkage joint 60 bearing of trends.For guaranteeing the globality that U intersegmental reinforced concrete floor 10 of type groove and

abutment wall

11,12 rigidity are excessive and the harmony of plastic deformation, among described adjacent two U type groove sections 1a, the 1b, being embedded with reinforcing bar wears pin 13 at interval on the longitudinal terminal surface of a U type groove sections 1a, on the longitudinal terminal surface of another U type groove sections 1b, then be embedded with corresponding with it seamless steel pipe 14 at interval, reinforcing bar is worn the pin 13 outer pitch hemp cuts of wrapping up in, reinforcing bar is worn pin 13 and is penetrated in the seamless steel pipe 14, is coated with butter in the gap between the two.

Some principles of the above the utility model deep pit support reinforcing anti-seepage water stop structure that just explains through diagrams, be not be the utility model to be confined to shown in and in described concrete structure and the scope of application, so every the corresponding modify and equivalent that might be utilized all belongs to the claim that the utility model is applied for.

Claims

1. deep pit support reinforcing anti-seepage water stop is constructed, and it is characterized in that it comprises: bored pile (20) is two row and is laid in respectively in the outer soil body of foundation pit side-wall; Rotary churning pile (30), after being the curtain shape and being laid in two row bored piles (20), its pile body is passed down through permeable solum; Prop up retaining and add solid (1), by base plate (10) and the integrant reinforced concrete structure U type of twice abutment wall (11,12) groove, a retaining adds solid (1) and fixedlys connected with two row bored piles (20) respectively by the Guan Liang (11a, 12a) at twice abutment wall (11,12) top; Antiseepage basic unit (40) is arranged between twice abutment wall (11,12) and the foundation pit side-wall; Antiseepage basal layer (50) is arranged between base plate (10) and the foundation ditch bottom surface.

2. deep pit support reinforcing anti-seepage water stop structure as claimed in claim 1, it is characterized in that: described antiseepage basic unit (40) is made of compounded rubber waterproof roll layer (41) and layer of concrete (42), layer of concrete (42) is laid on the foundation pit side-wall, and compounded rubber waterproof roll layer (41) is laid between abutment wall (11,12) and the layer of concrete (42).

3. deep pit support reinforcing anti-seepage water stop structure as claimed in claim 1, it is characterized in that: described antiseepage basal layer (50) is made of compounded rubber waterproof roll layer (41), cement sand bed (52), hardcore bed (53), hardcore bed (53) is laid on the foundation ditch bottom surface, cement sand bed (52) is laid on the hardcore bed (53), and compounded rubber waterproof roll layer (41) is laid between cement sand bed (52) and the base plate (10).

4. as any described deep pit support reinforcing anti-seepage water stop structure of claim 1 to 3, it is characterized in that: described retaining adds solid (1) by constituting along the vertical butted U-shaped groove of foundation ditch bearing of trend sections, leave shrinkage joint (60) between the adjacent two U type groove sections (1a, 1b), the shrinkage joint has leakage preventing structure in (60).

5. deep pit support reinforcing anti-seepage water stop structure as claimed in claim 4 is characterized in that: described leakage preventing structure comprises from inside to outside bituminous wood filament plate packing layer (65), pitch hemp cut packing layer (64), bituminous wood filament plate packing layer (63), the mastic asphalt packing layer (62) of filling successively.

6. deep pit support reinforcing anti-seepage water stop structure as claimed in claim 5 is characterized in that: described leakage preventing structure comprises that also (60) bearing of trend is embedded in the interior steel limit waterstop (61) of adjacent two U type groove sections (1a, 1b) jointly along the shrinkage joint.

7. deep pit support reinforcing anti-seepage water stop structure as claimed in claim 4, it is characterized in that: in the described adjacent two U type groove sections (1a, 1b), being embedded with reinforcing bar wears pin (13) at interval on the longitudinal terminal surface of a U type groove sections (1a), then is embedded with corresponding with it seamless steel pipe (14) on the longitudinal terminal surface of another U type groove sections (1b) at interval.