CN106761768B - A kind of steel pipe curtain structure support system and its construction method - Google Patents
A kind of steel pipe curtain structure support system and its construction method Download PDFInfo
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- CN106761768B CN106761768B CN201610988201.6A CN201610988201A CN106761768B CN 106761768 B CN106761768 B CN 106761768B CN 201610988201 A CN201610988201 A CN 201610988201A CN 106761768 B CN106761768 B CN 106761768B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Abstract
The invention discloses a kind of steel pipe curtain structure support system and its construction methods, it is related to underground tunneling support technology field, to solve the problem of that the junction stress weakness of the adjacent steel pipe of pipe curtain structure in the prior art needs to set up a large amount of temporary supports to ensure overall structure stability.Steel pipe curtain structure includes the first steel pipe, the second steel pipe and third steel pipe, multiple first steel pipes are arranged successively to form N-shaped structure, it is attached between two the first steel pipes of arbitrary neighborhood by third steel pipe, it is located at the second steel pipe of same level there are two being all provided at two stabilizer blades of the first steel pipe formation N-shaped structure, has poured into concrete in the first steel pipe, the second steel pipe and third steel pipe.Steel pipe curtain structure support system and its construction method improve the lateral stiffness and bearing capacity of pipe curtain support system in the present invention, without setting up a large amount of temporary supports, reduce project cost, it shortens the construction period, simplify working procedure, effectively prevent ground settlement, improves construction quality.
Description
Technical field
The present invention relates to underground tunneling support technology field, more particularly relate to a kind of steel pipe curtain structure support system and its
Construction method.
Background technique
Currently, the developable space in ground is fewer and fewer, develop the inexorable trend that the underground space is international metropolis, greatly
The type underground space uses tunneling mode as the construction of subway station etc..Pipe curtain construction method is that a kind of novel underground engineering is dark
Digging technology is a kind of construction party that large span cross-section underground project dug underground is constructed on the basis of large-diameter steel pipe solid matter supporting
Method, traffic above-ground busy section intensive especially suitable for urban architecture, under wear existing important structures building, an ultra shallow is buried and
In large section tunnel engineering, there is apparent advantage.
However, only being connected, causing the lateral stiffness of integral tube curtain and being held with fore shaft between traditional adjacent steel pipe of pipe curtain structure
When it is weaker to carry power, therefore excavating the soil body inside pipe curtain, needs to set up a large amount of temporary supports to ensure integrally-built stability, cause
Construction speed is slower.In addition lateral section is mostly domes, and space utilization rate is low.
Summary of the invention
The present invention provides a kind of steel pipe curtain structure support system and its construction method, to solve pipe curtain knot in the prior art
The junction stress of the adjacent steel pipe of structure is weak, needs to set up the problem of a large amount of temporary supports are to ensure integrally-built stability.
Specifically, steel pipe curtain structure support system, pipe curtain structure includes the first steel pipe, the second steel pipe and third steel pipe, and
The outer diameter of second steel pipe is bigger than the outer diameter of the first steel pipe, the first steel pipe, the second steel pipe and third steel pipe be it is multiple, multiple first
Steel pipe is arranged successively to form N-shaped structure, is attached between two the first steel pipes of arbitrary neighborhood by third steel pipe, the first steel pipe
Formed N-shaped structure two stabilizer blades at be all provided with there are two be located at same level the second steel pipe, the first steel pipe, the second steel pipe and
Concrete has been poured into third steel pipe；
The construction method of the steel pipe curtain structure support system, comprising the following steps:
S1, preparation of construction: according to the shape of design pipe curtain structure, determining the size and quantity required of various steel pipes, excavates
Vertical shaft builds operation platform；
S2, the first steel pipe that N-shaped structure is successively headed into design position, and dug out in the first steel pipe while jacking
The earthwork in portion；
S3, horizontal two the second steel pipes of jacking are distinguished at two stabilizer blades of N-shaped structure, and to the soil on the outside of the first steel pipe
Body and the second steel pipe lower part soil body carry out grouting and reinforcing, are correspondingly formed the second soil stabilization layer and the first soil stabilization layer；
S4, it is pre-designed at position and slots in the first steel pipe and the second steel pipe, remove the first steel pipe and the second steel pipe fluting
The soil body at place connects the first adjacent steel pipe using third steel pipe, and by the second steel pipe and adjacent with the second steel pipe first
Steel pipe is connected using third steel pipe, and first row stomata is reserved on third steel pipe；
S5, multiple high-strength bolts are uniformly installed on the both ends tube wall of third steel pipe；
S6, closure steel plate is respectively welded in the first steel pipe and the second steel pipe both ends, and in the first steel pipe and the second steel pipe one
Filling concrete hole and secondary grouting hole are reserved on the closure steel plate at end, reserve second row stomata on the closure steel plate of the other end；
S7, the concrete perfusion into the first steel pipe, the second steel pipe and third steel pipe；
S8, after concrete reaches design strength, carry out the excavation of the soil body below pipe curtain structure, excavate the soil body on one side, one
While welding bottom wing listrium in the first steel pipe inner tube wall of arbitrary neighborhood.
Preferably, the pipe axis of the first steel pipe of the pipe axis and two neighboring connection of third steel pipe is perpendicular, third steel pipe and
It is connected between two neighboring first steel pipe using welding manner, the first steel pipe is equipped with injected hole.
Preferably, it is fixed between the second steel pipe and the first adjacent steel pipe also by third steel-pipe welding.
It preferably, further include the first soil stabilization layer and the second soil stabilization layer, the first soil stabilization layer is set to second
The bottom of steel pipe, the second soil stabilization layer are set on the outside of two the first steel pipes of arbitrary neighborhood.
Preferably, the outer diameter of the first steel pipe is 1.2-1.4m, and the outer diameter of the second steel pipe is 1.8-2.2m, third steel pipe it is outer
Diameter is 0.3-0.5m.
Preferably, the end of third steel pipe is circumferentially equipped with 4 high-strength bolts, and high-strength bolt is 8.8 grade high-strength bolts,
And outer diameter is M22, high-strength bolt is evenly distributed on the tube wall of third steel pipe, and first row stomata is additionally provided on third steel pipe.
Preferably, the both ends of the first steel pipe and the second steel pipe are respectively equipped with closure steel plate, are set to the first steel pipe and second
The closure steel plate of steel pipe one end is equipped with filling concrete hole and secondary grouting hole, and the closure steel plate of the other end is equipped with second row
Stomata.
Preferably, bottom wing listrium, bottom wing listrium and the first steel-pipe welding are additionally provided between two the first steel pipes of arbitrary neighborhood
It is fixed.
The construction method of steel pipe curtain structure support system, comprising the following steps:
S1, preparation of construction: according to the shape of design pipe curtain structure, determining the size and quantity required of various steel pipes, excavates
Vertical shaft builds operation platform；
S2, the first steel pipe that N-shaped structure is successively headed into design position, and dug out in the first steel pipe while jacking
The earthwork in portion；
S3, horizontal two the second steel pipes of jacking are distinguished at two stabilizer blades of N-shaped structure, the outer diameter of the second steel pipe is than first
The outer diameter of steel pipe is big, and on the outside of the first steel pipe the soil body and the second steel pipe lower part soil body carry out grouting and reinforcing, be correspondingly formed the
Two soil stabilization layers and the first soil stabilization layer；
S4, it is pre-designed at position and slots in the first steel pipe and the second steel pipe, remove the first steel pipe and the second steel pipe fluting
The soil body at place connects the first adjacent steel pipe using third steel pipe, and by the second steel pipe and adjacent with the second steel pipe first
Steel pipe is connected using third steel pipe, and first row stomata is reserved on third steel pipe；
S5, multiple high-strength bolts are uniformly installed on the both ends tube wall of third steel pipe；
S6, closure steel plate is respectively welded in the first steel pipe and the second steel pipe both ends, and in the first steel pipe and the second steel pipe one
Filling concrete hole and secondary grouting hole are reserved on the closure steel plate at end, reserve second row stomata on the closure steel plate of the other end；
S7, the concrete perfusion into the first steel pipe, the second steel pipe and third steel pipe；
S8, after concrete reaches design strength, carry out the excavation of the soil body below pipe curtain structure, excavate the soil body on one side, one
While welding bottom wing listrium in the first steel pipe inner tube wall of arbitrary neighborhood.
Preferably, specific steel pipe curtain structure support system and its construction method, in step S7, in advance above the first steel pipe
Built-in slip casting pipe, by filling concrete hole into the first steel pipe, the second steel pipe and third steel pipe concrete perfusion, when the first steel
When not filling concrete in pipe, the second steel pipe and third steel pipe, by Grouting Pipe connect secondary grouting hole again to the first steel pipe,
Concrete perfusion in second steel pipe and third steel pipe.
The invention has the following advantages:
It is connected with third steel pipe with bottom wing listrium between adjacent first steel pipe in the present invention, compensates for each steel of conventional tube curtain structure
Only with lock connection between pipe, the disadvantage for causing the junction stress of the adjacent steel pipe of pipe curtain structure very weak；It is proposed by the present invention
Pipe curtain support system substantially increases its lateral stiffness and bearing capacity, a large amount of without setting up when excavating the soil body below steel pipe curtain
Temporary support, and then construction cost is reduced, it shortens the construction period, simplifies working procedure；Pipe curtain structure proposed by the present invention top is water
Plane, whole section substantially increase the utilization rate of the underground space relative to crowned section for rectangular configuration；Two sides of the present invention
Two the second steel pipes being relatively large in diameter of the lower part jacking of pipe curtain, and grouting and reinforcing is carried out to the second steel pipe lower part, increase two
The rigidity of side steel pipe curtain bottom effectively reduces the downward sedimentation of whole steel pipe curtain, thereby reduces ground settlement, improve
Construction quality.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the steel pipe curtain structure support system structural schematic diagram that the embodiment of the present invention 1 provides；
Adjacent first steel pipe connection structure signal in the steel pipe curtain structure support system that Fig. 2 provides for the embodiment of the present invention 1
Figure；
Bolt distribution map on third steel pipe in the steel pipe curtain structure support system that Fig. 3 provides for the embodiment of the present invention 1；
Steel plate structure schematic diagram is blocked in the steel pipe curtain structure support system that Fig. 4 provides for the embodiment of the present invention 1；
Slip casting hole site signal on first steel pipe in the steel pipe curtain structure support system that Fig. 5 provides for the embodiment of the present invention 1
Figure.
Description of symbols:
The first steel pipe of 1-, 11- injected hole, the second steel pipe of 2-, 3- third steel pipe, 31- high-strength bolt, the first soil stabilization of 4-
Layer, 5- bottom wing listrium, 6- the second soil stabilization layer, the ground 7-, 8- block steel plate, 81- filling concrete hole, 82- secondary grouting
Hole, 83- gas vent.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figs. 1-5, the embodiment of the present invention 1 provides a kind of steel pipe curtain structure support system, and pipe curtain structure includes first
Steel pipe 1, the second steel pipe 2 and third steel pipe 3, and the outer diameter of second steel pipe 2 is bigger than the outer diameter of the first steel pipe 1, the first steel pipe
1, the second steel pipe 2 and third steel pipe 3 are multiple, and multiple first steel pipes 1 are arranged successively to form N-shaped structure, and arbitrary neighborhood two
It is attached between first steel pipe 1 by third steel pipe 3, there are two the first steel pipe 1 is formed at two stabilizer blades of N-shaped structure and is all provided with
Positioned at the second steel pipe 2 of same level, concrete has been poured into the first steel pipe 1, the second steel pipe 2 and third steel pipe 3；
The construction method of the steel pipe curtain structure support system, comprising the following steps:
S1, preparation of construction: according to the shape of design pipe curtain structure, determining the size and quantity required of various steel pipes, excavates
Vertical shaft builds operation platform；
S2, the first steel pipe 1 of N-shaped structure is successively headed into design position, and digs out the first steel pipe 1 while jacking
The internal earthwork；
S3, horizontal two the second steel pipes 2 of jacking are distinguished at two stabilizer blades of N-shaped structure, and to 1 outside of the first steel pipe
The soil body and the 2 lower part soil body of the second steel pipe carry out grouting and reinforcing, are correspondingly formed the second soil stabilization layer 6 and the first soil stabilization layer 4；
S4, it is pre-designed at position and slots in the first steel pipe 1 and the second steel pipe 2, remove the first steel pipe 1 and the second steel pipe 2
The soil body at fluting connects the first adjacent steel pipe 1 using third steel pipe 3, and by the second steel pipe 2 and with 2 phase of the second steel pipe
The first adjacent steel pipe 1 is connected using third steel pipe 3, and first row stomata is reserved on third steel pipe 3；
S5, multiple high-strength bolts 31 are uniformly installed on the both ends tube wall of third steel pipe 3；
S6, the first steel pipe 1 and 2 both ends of the second steel pipe are respectively welded to closure steel plate 8, and in the first steel pipe 1 and the second steel
Filling concrete hole 81 and secondary grouting hole 82 are reserved on the closure steel plate 8 of 2 one end of pipe, are reserved on the closure steel plate 8 of the other end
Second row stomata 83；
S7, the concrete perfusion into the first steel pipe 1, the second steel pipe 2 and third steel pipe 3；
S8, after concrete reaches design strength, carry out the excavation of the soil body below pipe curtain structure, excavate the soil body on one side, one
While welding bottom wing listrium 5 in 1 inner tube wall of the first steel pipe of arbitrary neighborhood.
Wherein, the outer diameter of the first steel pipe 1 is 1.2m, and the outer diameter of the second steel pipe 2 is 1.8m, and the outer diameter of third steel pipe 3 is
The pipe axis of 0.3m, the first steel pipe 1 of the pipe axis and two neighboring connection of third steel pipe 3 are perpendicular, third steel pipe 3 and two neighboring
It is connected between first steel pipe 1 using welding manner, the first steel pipe 1 is equipped with injected hole 11, convenient for the soil to 1 outside of the first steel pipe
Body carries out grouting and reinforcing；It is fixed between second steel pipe 2 and the first adjacent steel pipe 1 also by third steel-pipe welding, support system
It further include the first soil stabilization layer 4 and the second soil stabilization layer 6, the first soil stabilization layer 4 is set to the bottom of the second steel pipe 2,
Second steel pipe 2 and the first soil stabilization layer 4 are effectively increased the bottom rigidity of steel pipe curtain structure two sides, reduce whole steel pipe
The downward sedimentation of curtain, reduces ground settlement, improves construction quality；Second soil stabilization layer 6 is set to arbitrary neighborhood two
The outside of first steel pipe 1, by the injected hole 11 on the first steel pipe 1 into the soil body grouting and reinforcing, formed the second soil stabilization layer
6, increase the intensity of pipe curtain structure horizontal plane；The end of third steel pipe 3 is circumferentially equipped with 4 high-strength bolts 31, high-strength bolt 31
8.8 grade high-strength bolts are selected, and outer diameter is M22,4 high-strength bolts 31 are evenly distributed on the tube wall of third steel pipe 3, third
First row stomata is additionally provided on steel pipe 3, high-strength bolt 31 can enhance pulling capacity and cohesive force of the third steel pipe 3 in concrete,
First row stomata concrete can be perfused inside third steel pipe 3 closely knit in concrete perfusion；First steel pipe 1 and second
The both ends of steel pipe 2, which are respectively equipped with, blocks steel plate 8, and the closure steel plate 8 for being set to 2 one end of the first steel pipe 1 and the second steel pipe is equipped with
The closure steel plate 8 in filling concrete hole 81 and secondary grouting hole 82, the other end is equipped with second row stomata 83, filling concrete hole
81 are used in concrete perfusion for the concrete perfusion into the first steel pipe 1 and the second steel pipe 2, second row stomata 83 to outside
Exhaust, keeps filling concrete closely knit, the setting in secondary grouting hole 82 be in order to prevent steel pipe inner concrete perfusion leakiness, can be
Later period carries out secondary grouting；Bottom wing listrium 5, bottom wing listrium 5 and the first steel pipe are additionally provided between two the first steel pipes 1 of arbitrary neighborhood
1 is welded and fixed, and third steel pipe 3 and bottom wing listrium 5 connect the first adjacent steel plate 1 simultaneously, strengthens adjacent first steel pipe 1 and connects
The stress at place improves pipe curtain structure lateral stiffness and bearing capacity.
Specifically, steel pipe curtain structure support system and its construction method, comprising the following steps:
S1, preparation of construction: according to the shape of design pipe curtain structure, determining the size and quantity required of various steel pipes, excavates
Vertical shaft builds operation platform；
S2, the first steel pipe 1 of N-shaped structure is successively headed into 7 envisaged underneath position of ground, and is dug out while jacking
The earthwork inside first steel pipe 1；
S3, distinguish horizontal two the second steel pipes 2 of jacking at two stabilizer blades of N-shaped structure, the outer diameter of the second steel pipe 2 is than the
The outer diameter of one steel pipe 1 is big, and carries out grouting and reinforcing to the soil body and the 2 lower part soil body of the second steel pipe in 1 outside of the first steel pipe, corresponds to shape
At the second soil stabilization layer 6 and the first soil stabilization layer 4；
S4, it is pre-designed at position and slots in the first steel pipe 1 and the second steel pipe 2, remove the first steel pipe 1 and the second steel pipe 2
The soil body at fluting connects the first adjacent steel pipe 1 using third steel pipe 3, and by the second steel pipe 2 and with 2 phase of the second steel pipe
The first adjacent steel pipe 1 is connected using third steel pipe 3, and first row stomata is reserved on third steel pipe 3；
S5,4 high-strength bolts 31 are uniformly installed on the both ends tube wall of third steel pipe 3；
S6, the first steel pipe 1 and 2 both ends of the second steel pipe are respectively welded to closure steel plate 8, and in the first steel pipe 1 and the second steel
Filling concrete hole 81 and secondary grouting hole 82 are reserved on the closure steel plate 8 of 2 one end of pipe, are reserved on the closure steel plate 8 of the other end
Second row stomata 83；
S7, the in advance built-in slip casting pipe above the first steel pipe 1, by blocking the filling concrete hole 81 reserved on steel plate 8
The concrete perfusion into the first steel pipe 1, the second steel pipe 2 and third steel pipe 3, when the first steel pipe 1, the second steel pipe 2 and third steel pipe 3
In when not filling concrete, be perfused again into the first steel pipe 1, the second steel pipe 2 and third steel pipe 3 by secondary grouting hole 82 mixed
Solidifying soil；
S8, after concrete reaches design strength, carry out the excavation of the soil body below pipe curtain structure, excavate the soil body on one side, one
While welding bottom wing listrium 5 in 1 inner tube wall of the first steel pipe of arbitrary neighborhood.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of steel pipe curtain structure support system, which is characterized in that the pipe curtain structure includes the first steel pipe (1), the second steel pipe
(2) and third steel pipe (3), and the outer diameter of second steel pipe (2) is bigger than the outer diameter of the first steel pipe (1), first steel pipe
(1), second steel pipe (2) and the third steel pipe (3) are multiple, and multiple first steel pipes (1) are arranged successively to form n
Type structure is attached between arbitrary neighborhood two first steel pipes (1), first steel by the third steel pipe (3)
It is located at second steel pipe (2) of same level, first steel there are two being all provided at two stabilizer blades of pipe formation N-shaped structure
Concrete has been poured into pipe (1), the second steel pipe (2) and third steel pipe (3)；
The construction method of the steel pipe curtain structure support system, comprising the following steps:
S1, preparation of construction: according to the shape of design pipe curtain structure, determining the size and quantity required of various steel pipes, excavating shaft,
Build operation platform；
S2, the first steel pipe (1) of N-shaped structure is successively headed into design position, and digs out the first steel pipe (1) while jacking
The internal earthwork；
S3, horizontal two the second steel pipes (2) of jacking are distinguished at two stabilizer blades of N-shaped structure, and to the first steel pipe (1) on the outside of
The soil body and the second steel pipe (2) the lower part soil body carry out grouting and reinforcing, are correspondingly formed the second soil stabilization layer (6) and the first soil stabilization
Layer (4)；
S4, it is pre-designed at position and slots in the first steel pipe (1) and the second steel pipe (2), remove the first steel pipe (1) and the second steel pipe
(2) soil body at fluting connects adjacent the first steel pipe (1) using third steel pipe (3), and by the second steel pipe (2) and with the
Adjacent the first steel pipe (1) of two steel pipes (2) is connected using third steel pipe (3), and first row stomata is reserved on third steel pipe (3)；
S5, multiple high-strength bolts (31) are uniformly installed on the both ends tube wall of third steel pipe (3)；
S6, it the first steel pipe (1) and the second steel pipe (2) both ends is respectively welded blocks steel plate (8), and in the first steel pipe (1) and the
Filling concrete hole (81) and secondary grouting hole (82) are reserved on the closure steel plate (8) of two steel pipes (2) one end, the closure of the other end
Second row stomata (83) are reserved on steel plate (8)；
S7, the concrete perfusion into the first steel pipe (1), the second steel pipe (2) and third steel pipe (3)；
S8, after concrete reaches design strength, carry out the excavation of the soil body below pipe curtain structure, excavate the soil body on one side, exist on one side
Bottom wing listrium (5) are welded in the first steel pipe (1) inner tube wall of arbitrary neighborhood.
2. a kind of steel pipe curtain structure support system according to claim 1, which is characterized in that the third steel pipe (3)
Pipe axis and the pipe axis of first steel pipe (1) of two neighboring connection are perpendicular, the third steel pipe (3) and two neighboring described
It is connected between first steel pipe (1) using welding manner, first steel pipe (1) is equipped with injected hole (11).
3. a kind of steel pipe curtain structure support system according to claim 1, which is characterized in that second steel pipe (2) with
It is welded and fixed between adjacent first steel pipe (1) also by the third steel pipe (3).
4. a kind of steel pipe curtain structure support system according to claim 1, which is characterized in that further include the first soil stabilization
Layer (4) and the second soil stabilization layer (6), the first soil stabilization layer (4) are set to the bottom of second steel pipe (2), institute
The second soil stabilization layer (6) is stated to be set on the outside of arbitrary neighborhood two first steel pipes (1).
5. a kind of steel pipe curtain structure support system according to claim 1, which is characterized in that first steel pipe (1)
Outer diameter is 1.2-1.4m, and the outer diameter of second steel pipe (2) is 1.8-2.2m, and the outer diameter of the third steel pipe (3) is 0.3-
0.5m。
6. a kind of steel pipe curtain structure support system according to claim 1, which is characterized in that the third steel pipe (3)
End is circumferentially equipped with 4 high-strength bolts (31), and the high-strength bolt (31) is 8.8 grade high-strength bolts, and outer diameter is M22,
The high-strength bolt (31) is evenly distributed on the tube wall of the third steel pipe (3), is additionally provided with first on the third steel pipe (3)
Gas vent.
7. a kind of steel pipe curtain structure support system according to claim 1, which is characterized in that first steel pipe (1) and
The both ends of second steel pipe (2), which are respectively equipped with, blocks steel plate (8), is set to first steel pipe (1) and second steel pipe
(2) the closure steel plate (8) of one end is equipped with filling concrete hole (81) and secondary grouting hole (82), the closure steel of the other end
Plate (8) is equipped with second row stomata (83).
8. a kind of steel pipe curtain structure support system according to claim 1, which is characterized in that arbitrary neighborhood two described
It is additionally provided between one steel pipe (1) bottom wing listrium (5), the bottom wing listrium (5) is welded and fixed with first steel pipe (1).
9. a kind of construction method of steel pipe curtain structure support system, which comprises the following steps:
S1, preparation of construction: according to the shape of design pipe curtain structure, determining the size and quantity required of various steel pipes, excavating shaft,
Build operation platform；
S2, the first steel pipe (1) of N-shaped structure is successively headed into design position, and digs out the first steel pipe (1) while jacking
The internal earthwork；
S3, distinguish horizontal two the second steel pipes (2) of jacking at two stabilizer blades of N-shaped structure, the outer diameter of the second steel pipe (2) is than the
The outer diameter of one steel pipe (1) is big, and on the outside of the first steel pipe (1) the soil body and the second steel pipe (2) the lower part soil body carry out grouting and reinforcing,
It is correspondingly formed the second soil stabilization layer (6) and the first soil stabilization layer (4)；
S4, it is pre-designed at position and slots in the first steel pipe (1) and the second steel pipe (2), remove the first steel pipe (1) and the second steel pipe
(2) soil body at fluting connects adjacent the first steel pipe (1) using third steel pipe (3), and by the second steel pipe (2) and with the
Adjacent the first steel pipe (1) of two steel pipes (2) is connected using third steel pipe (3), and first row stomata is reserved on third steel pipe (3)；
S5, multiple high-strength bolts (31) are uniformly installed on the both ends tube wall of third steel pipe (3)；
S6, it the first steel pipe (1) and the second steel pipe (2) both ends is respectively welded blocks steel plate (8), and in the first steel pipe (1) and the
Filling concrete hole (81) and secondary grouting hole (82) are reserved on the closure steel plate (8) of two steel pipes (2) one end, the closure of the other end
Second row stomata (83) are reserved on steel plate (8)；
S7, the concrete perfusion into the first steel pipe (1), the second steel pipe (2) and third steel pipe (3)；
S8, after concrete reaches design strength, carry out the excavation of the soil body below pipe curtain structure, excavate the soil body on one side, exist on one side
Bottom wing listrium (5) are welded in the first steel pipe (1) inner tube wall of arbitrary neighborhood.
10. a kind of construction method of steel pipe curtain structure support system according to claim 9, which is characterized in that step S7
In, the built-in slip casting pipe above the first steel pipe (1) in advance, by filling concrete hole (81) to the first steel pipe (1), the second steel pipe
(2) concrete perfusion and in third steel pipe (3), it is mixed when not filled in the first steel pipe (1), the second steel pipe (2) and third steel pipe (3)
When solidifying soil, by Grouting Pipe connection secondary grouting hole (82) again to the first steel pipe (1), the second steel pipe (2) and third steel pipe (3)
Middle concrete perfusion.
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