CN106801417B - Tunnel Passing structures steel pipe isolation pile stratum consolidation system and its construction method - Google Patents
Tunnel Passing structures steel pipe isolation pile stratum consolidation system and its construction method Download PDFInfo
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- CN106801417B CN106801417B CN201611108764.8A CN201611108764A CN106801417B CN 106801417 B CN106801417 B CN 106801417B CN 201611108764 A CN201611108764 A CN 201611108764A CN 106801417 B CN106801417 B CN 106801417B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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Abstract
The present invention relates to Tunnel Passing structures steel pipe isolation pile stratum consolidation system and its construction methods.It is influenced by surrounding enviroment, when Tunnel Passing structures, may be limited by site condition and surrounding enviroment, when the isolation pile of conventional cast-in-situ bored pile pattern is without structures are worn between implementation condition, such as tunnel and structures when net level length deficiency or under tunnel.The present invention sets steel pipe isolation pile in a row between existing buildings (basement) and under-traverse tunnel, and the tunnel arch following certain distance in bottom is goed deep into bottom, and steel pipe isolation pile is oblique or vertically squeezes into, and top is linked to be entirety by stake top crown beam；Between steel pipe isolation pile and structures basement, then set mini-valve tube in a row, the following certain distance of structures basement is goed deep into bottom, carries out tracking grouting.The present invention has the characteristics that occupied area is small, construction is flexible and adapts to all kinds of environmental requirements, can satisfy the structures consolidation process requirement in various situations.
Description
Technical field
The invention belongs to Tunnel Engineering technical fields, and in particular to a kind of Tunnel Passing structures steel pipe isolation pile stratum adds
Solid system and its construction method.
Background technique
For the railway traffic engineering of current cities in China, with the continuous encryption of subway gauze, subsequent subway line
When road is built, influenced by built subway line and surrounding enviroment, in line alignment and paving mode, spatial relationship and structural type
Formula and construction method and the requirement of engineering measure etc. are stringenter.When Tunnel Passing existing buildings, by space away from
From the influence with underground utilities, the isolation pile of conventional cast-in-situ bored pile pattern may be without implementation condition.
Summary of the invention
The object of the present invention is to provide a kind of Tunnel Passing structures steel pipe isolation pile stratum consolidation system and its construction parties
Method is acted on by the tracking grouting of the isolation effect of steel-pipe pile and mini-valve tube, it can be achieved that Tunnel Passing is constructed under complex environment
During object, structure base bearing capacity is substantially unaffected.
The technical scheme adopted by the invention is as follows:
Tunnel Passing structures steel pipe isolation pile stratum consolidation system, it is characterised in that:
Set steel pipe isolation pile in a row between existing buildings basement and under-traverse tunnel, steel pipe isolation pile is oblique or vertical
It directly squeezes into, entirety is linked to be by stake top crown beam at the top of steel pipe isolation pile.
Mini-valve tube is set in a row between steel pipe isolation pile and structures basement.
Steel pipe isolation pile is formed by the framework of steel reinforcement in steel pipe and steel pipe by concrete perfusion, and framework of steel reinforcement includes joint bar
With the stirrup of annular configuration.
Stake top crown beam is protruded at the top of steel pipe isolation pile, steel pipe isolation stake top position is provided with the U-shaped steel muscle of outward opening,
Steel pipe is securely welded with U-shaped steel muscle；
Perpendicular crown beam reinforcing bar is welded on U-shaped steel muscle.
Tunnel arch bottom or less at least 2m, stake top crown beam top surface and ground at the top of steel pipe isolation pile are goed deep into steel pipe isolation pile bottom
Table is concordant；
Steel pipe isolation pile angle with horizontal plane >=30 °；
The longitudinal pitch of steel pipe isolation pile is not less than 0.5m.
Structures basement bottom board or less at least 3m is goed deep into mini-valve tube bottom, and top is concordant with earth's surface；
Mini-valve tube angle with horizontal plane >=30 °；
The longitudinal pitch of mini-valve tube is not less than 0.5m.
The construction method of Tunnel Passing structures steel pipe isolation pile stratum consolidation system, it is characterised in that:
The following steps are included:
Step 1: measuring setting-out between existing buildings and tunnel, according to design coordinate, marks steel pipe isolation pile
With mini-valve tube in earth's surface respective coordinates point position；
Step 2: mounting and positioning device, according to design angle, using roof-bolter or other drilling machine pore-formings, drilling diameter is omited
Greater than steel pipe isolation pile diameter, to ensure pore-forming effect, using pipe-following drilling technique, strict control drilling machine angle is needed in pore forming process
Degree, it is ensured that along design direction high-precision drilling into；
Step 3: in pore forming process, being put into steel pipe according to depth of pore forming in time, and every section of length of steel pipe is considered by 3~5m,
Coupling is securely connected using screw thread, it is ensured that steel pipe bottom gos deep into tunnel arch bottom or less at least 2m；；After pore-forming, by steel
Gap between pipe isolation pile and pore-forming hole wall is backfilled closely knit using cement mortar；
Step 4: before being placed into designated position as required to steel pipe, the joint bar in steel pipe is welded with stirrup as required
Framework of steel reinforcement, is then put into steel pipe by integral framework of steel reinforcement, and slightly expanded concrete is finally perfused as required, and being formed has one
Determine the steel pipe isolation pile of bending stiffness；
Step 5: after steel pipe isolation pile is all implemented in place, stake top being excavated, and welds U at stake top steel pipe wall position
Steel bar then binds crown beam reinforcing bar, and U-shaped steel muscle and crown beam reinforcing bar is welded as required, subsequent casting concrete, forms hat
Beam；
Step 6: roof-bolter or other drilling machine pore-formings, drilling diameter is used to be slightly larger than again according to mini-valve tube setting-out coordinate
Mini-valve tube diameter needs strict control drilling machine angle in pore forming process, it is ensured that along design direction high-precision drilling into；
Step 7: after to mini-valve tube pore-forming, pre-buried mini-valve tube, mini-valve tube bottom are goed deep by protection structures as required
At least 3m below basement bottom board；
Step 8: during Tunnel Passing structures, according to monitoring situation, mini-valve tube tracking grouting is carried out in time, by tunnel
Stratum settlement caused by excavating effectively is made up in the influence of structures bottom by sleeve valve barrel grouting.
The invention has the following advantages that
The present invention sets steel-pipe pile, mini-valve tube in earth's surface, and steel reinforcement cage, pressure injection micro-expansion cement, In are inserted into steel-pipe pile
Stake top pours crown beam, forms steel pipe isolation pile reinforcement system, and the steel being related to, cement mortar and steel-pipe pile set used
Mechanical equipment etc. is conventional material (equipment), and corresponding size is general type, manufacture easy to process；And steel-pipe pile, sleeve valve
Length of tube can be adjusted according to tunnel and structures buried depth, steel-pipe pile, mini-valve tube horizontal layout can be according to underground utilities point
The relative positional relationship of cloth situation, tunnel and structures is adjusted, and steel-pipe pile rigidity can be mixed according to the microdilatancy of inside filling
Solidifying soil grade, steel reinforcement cage and steel pipe stiffness by itself information summary determine, steel-pipe pile, mini-valve tube quantity, set angle can basis
The needs for being reinforced structures are adjusted.It, can be true by the tracking grouting effect of the blanketing effect of steel pipe isolation pile, mini-valve tube
The safety for protecting surrounding enviroment during Tunnel Passing structures, reaches that be not only able to satisfy surrounding enviroment harshness small with occupied area, but also energy
Reach the requirement of stratum consolidation, during can avoid routine cast-in-situ bored pile implementation, noise is big, land occupation is big, it may also be desirable to simultaneously
It carries out underground utilities and moves the adverse effect changed.Have high economic benefit and social benefit, urban track traffic, railway,
Have wide practical use in the engineerings such as highway.
Detailed description of the invention
Fig. 1 is that steel pipe isolation pile reinforces schematic diagram.
Fig. 2 is joint bar drawing in steel pipe isolation pile.
Fig. 3 is that the short muscle of steel pipe top welds schematic diagram.
In figure, 1- existing buildings, 2- structures basement, the tunnel 3-, 4- steel pipe isolation pile, 5- mini-valve tube, 6- stake top
Crown beam, 7- crown beam reinforcing bar, 8-U steel bar, 9- joint bar, 10- stirrup.
Specific embodiment
The present invention will be described in detail With reference to embodiment.
Tunnel Passing structures steel pipe isolation pile stratum consolidation system of the present invention, in constructing for existing buildings 1
Object basement 2 and under set steel pipe isolation pile 4 in a row between the tunnel 3 worn, steel pipe isolation pile 4 is oblique or vertically squeezes into, steel pipe
Entirety is linked to be by horizontal stake top crown beam 6 at the top of isolation pile 4.Steel pipe isolation pile 4 and existing buildings 1 have certain level away from
From to guarantee the safety of existing buildings 1 during reinforcement measure is implemented.It is arranged between steel pipe isolation pile 4 and structures basement 2
The mini-valve tube 5 being arranged in rows.
Existing buildings 1 may include various type of foundation, structural shape, and structures basement 2 within 3 layers generally by examining
Consider；Tunnel 3 can be similar round or shape of a hoof Tunneling by mining method, circular shield tunnel or rectangle open trench tunnel.
Steel pipe isolation pile 4 is formed by the framework of steel reinforcement in steel pipe and steel pipe by concrete perfusion, and framework of steel reinforcement includes inserting
Muscle 9 and the stirrup of annular configuration 10.6 certain distance of stake top crown beam, 4 stake top of steel pipe isolation pile are protruded at the top of steel pipe isolation pile 4
Position is provided with the U-shaped steel muscle 8 of outward opening, and steel pipe and U-shaped steel muscle 8 are welded to connect；It is welded on U-shaped steel muscle 8 perpendicular
Crown beam reinforcing bar 7.The following certain distance in 3 bottom of tunnel (not less than 2m) is goed deep into the bottom of steel pipe isolation pile 4, to ensure that effect is isolated
Fruit, 4 top crown beam of steel pipe isolation pile, 6 top surface are concordant with ground；4 angle with horizontal plane >=30 ° of steel pipe isolation pile；Steel pipe isolation pile
4 longitudinal pitch is not less than 0.5m.
The following certain distance of 2 bottom plate of structures basement (not less than 3m) is goed deep into 5 bottom of mini-valve tube, and top and ground are flat
Together；5 angle with horizontal plane >=30 ° of mini-valve tube；The longitudinal pitch of mini-valve tube 5 is not less than 0.5m.
The construction method of above-mentioned Tunnel Passing structures steel pipe isolation pile stratum consolidation system, comprising the following steps:
Step 1: measuring setting-out between existing buildings 1 and under-traverse tunnel 3, according to design coordinate, marks steel pipe
Isolation pile 4 and mini-valve tube 5 are in earth's surface respective coordinates point position；
Step 2: mounting and positioning device, according to design angle, using roof-bolter or other drilling machine pore-formings, drilling diameter is omited
Greater than 3 diameter of steel pipe isolation pile, to ensure pore-forming effect, using pipe-following drilling technique, strict control drilling machine is needed in pore forming process
Angle, it is ensured that along design direction high-precision drilling into；
Step 3: in pore forming process, being put into steel pipe according to depth of pore forming in time, and every section of length of steel pipe is considered by 3~5m,
Coupling is securely connected using screw thread；After pore-forming, by the gap between steel pipe isolation pile 3 and pore-forming hole wall, using cement
Mortar backfill is closely knit；
Step 4: before being placed into designated position as required to steel pipe, the joint bar 9 in steel pipe is welded with stirrup 10 as required
It is connected into whole framework of steel reinforcement, then framework of steel reinforcement is put into steel pipe, slightly expanded concrete is finally perfused as required, formation has
The steel pipe isolation pile 4 of certain bending stiffness；
Step 5: after steel pipe isolation pile 4 is all implemented in place, stake top being excavated, and welds U-shaped steel muscle 8 at stake top position,
Then binding crown beam reinforcing bar 6, and U-shaped steel muscle 8 and crown beam reinforcing bar 6 are welded as required, subsequent casting concrete, form crown beam 6；
Step 6: roof-bolter or other drilling machine pore-formings, drilling diameter is used to be slightly larger than again according to 5 setting-out coordinate of mini-valve tube
Mini-valve tube diameter needs strict control drilling machine angle in pore forming process, it is ensured that along design direction high-precision drilling into；
Step 7: after to mini-valve tube pore-forming, pre-buried mini-valve tube 5,5 bottom of mini-valve tube are deeply constructed by protection as required
3m below 2 bottom plate of object basement；
Step 8: during Tunnel Passing structures, according to monitoring situation, 5 tracking grouting of mini-valve tube is carried out in time, by tunnel
Stratum settlement caused by excavating effectively is made up in the influence of 1 bottom of structures by sleeve valve barrel grouting.
The structures safeguard measure that steel pipe isolation pile is combined with mini-valve tube has flexible and changeable, adaptable, safety can
By the features such as.Steel-pipe pile plan-position can be adjusted as needed with angle is set, this is essential characteristic of the invention, stake top
The steel reinforcement cage and slightly expanded concrete that are inserted into crown beam, steel-pipe pile are to ensure that the basic measures of its overall isolation effect, add
The tracking grouting of mini-valve tube acts on, it can be ensured that the Environmental security during Tunnel Passing structures.
The contents of the present invention are not limited to cited by embodiment, and those of ordinary skill in the art are by reading description of the invention
And to any equivalent transformation that technical solution of the present invention is taken, all are covered by the claims of the invention.
Claims (5)
1. Tunnel Passing structures steel pipe isolation pile stratum consolidation system, it is characterised in that:
Set steel pipe isolation pile (4), steel pipe isolation pile (4) in a row between existing buildings (1) basement and under-traverse tunnel (3)
It is oblique to squeeze into, it is linked to be entirety by stake top crown beam (6) at the top of steel pipe isolation pile (4)；
It is protruded into stake top crown beam (6) at the top of steel pipe isolation pile (4), steel pipe isolation pile (4) stake top position is provided with the U-shaped of outward opening
Reinforcing bar (8), steel pipe and U-shaped steel muscle (8) are securely welded；Perpendicular crown beam reinforcing bar (7) is welded on U-shaped steel muscle (8)；
Tunnel (3) arch bottom or less at least 2m, the stake top crown beam (6) at the top of steel pipe isolation pile (4) are goed deep into steel pipe isolation pile (4) bottom
Top surface is concordant with earth's surface；Steel pipe isolation pile (4) angle with horizontal plane >=30 °；The longitudinal pitch of steel pipe isolation pile (4) is not less than
0.5m。
2. Tunnel Passing structures steel pipe isolation pile stratum consolidation system according to claim 1, it is characterised in that:
Set mini-valve tube (5) between steel pipe isolation pile (4) and structures basement (2) in a row.
3. Tunnel Passing structures steel pipe isolation pile stratum consolidation system according to claim 1, it is characterised in that:
Steel pipe isolation pile (4) is formed by the framework of steel reinforcement in steel pipe and steel pipe by concrete perfusion, and framework of steel reinforcement includes joint bar
(9) with the stirrup of annular configuration (10).
4. Tunnel Passing structures steel pipe isolation pile stratum consolidation system according to claim 2, it is characterised in that:
Structures basement (2) bottom plate or less at least 3m is goed deep into mini-valve tube (5) bottom, and top is concordant with earth's surface；
Mini-valve tube (5) angle with horizontal plane >=30 °；
The longitudinal pitch of mini-valve tube (5) is not less than 0.5m.
5. the construction method of Tunnel Passing structures steel pipe isolation pile stratum consolidation system, it is characterised in that:
The following steps are included:
Step 1: measuring setting-out between existing buildings (1) and tunnel (3), according to design coordinate, marks steel pipe isolation
Stake (4) and mini-valve tube (5) are in earth's surface respective coordinates point position；
Step 2: mounting and positioning device is slightly larger than according to design angle using roof-bolter or other drilling machine pore-formings, drilling diameter
Steel pipe isolation pile (3) diameter, using pipe-following drilling technique, needs strict control drilling machine angle to ensure pore-forming effect in pore forming process
Degree, it is ensured that along design direction high-precision drilling into；
Step 3: in pore forming process, steel pipe is put into according to depth of pore forming in time, every section of length of steel pipe is considered by 3~5m, steel pipe
Connector is securely connected using screw thread, it is ensured that steel pipe bottom gos deep into tunnel (3) arch bottom or less at least 2m；After pore-forming, by steel pipe
Gap between isolation pile (3) and pore-forming hole wall is backfilled closely knit using cement mortar；
Step 4: before being placed into designated position as required to steel pipe, the joint bar (9) in steel pipe is welded with stirrup (10) as required
It is connected into whole framework of steel reinforcement, then framework of steel reinforcement is put into steel pipe, slightly expanded concrete is finally perfused as required, formation has
The steel pipe isolation pile (4) of certain bending stiffness；
Step 5: after steel pipe isolation pile (4) is all implemented in place, stake top being excavated, and is welded at stake top steel pipe wall position U-shaped
Reinforcing bar (8) then binds crown beam reinforcing bar (7), and U-shaped steel muscle (8) and crown beam reinforcing bar (7) is welded as required, mixed with after-pouring
Solidifying soil, forms crown beam (6)；
Step 6: roof-bolter or other drilling machine pore-formings are used according to mini-valve tube (5) setting-out coordinate again, drilling diameter is slightly larger than sleeve
Valve pipe diameter needs strict control drilling machine angle in pore forming process, it is ensured that along design direction high-precision drilling into；
Step 7: after to mini-valve tube pore-forming, pre-buried mini-valve tube (5), mini-valve tube (5) bottom are deeply constructed by protection as required
At least 3m below object basement (2) bottom plate；
Step 8: during Tunnel Passing structures, according to monitoring situation, mini-valve tube (5) tracking grouting is carried out in time, tunnel is opened
Stratum settlement caused by digging effectively is made up in the influence of structures (1) bottom by sleeve valve barrel grouting.
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