CN107227741A - Basement supporting construction - Google Patents
Basement supporting construction Download PDFInfo
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- CN107227741A CN107227741A CN201710635355.1A CN201710635355A CN107227741A CN 107227741 A CN107227741 A CN 107227741A CN 201710635355 A CN201710635355 A CN 201710635355A CN 107227741 A CN107227741 A CN 107227741A
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- suspension cable
- concrete
- arch brace
- steel suspension
- basement
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of basement supporting construction, it is characterized in that pulley is provided below in raft plate, pulley uses steel ball roller bearing, and pulley is arranged below steel plate, horizontal sleeper is provided below in steel plate, and horizontal sleeper uses the lumps of wood；Translation direction arrangement of the pulley along Wood construction thing；Have in the middle of pulley and weld anchor rib above bearing, bearing, new basis, new basis top laying rubber bed course are set at sliding in place position；It is brick loose tool that new foundation bottom, which is provided below below earthquake cushion, earthquake cushion,；The raft plate of Wood construction thing is set to couple with new basis using bar planting method in the corner of Wood construction thing.The present invention has the advantages that construction safety is reliable, cost is low.
Description
Technical field
The present invention relates to a kind of supporting construction, more particularly to a kind of basement supporting construction.
Background technology
Concrete is set when basement excavation is deeper to supportting to resist passive earth pressure, concrete is to supportting excessive setting not
But engineering cost can be increased, and be unfavorable for cutting the earth, concrete can be very big to the horizontal axle power suffered by support, how both to have reduced mixed
Solidifying soil can ensure that safety is the problem that engineering staff faces to the axle power of support again.But, how to be reduced in the case where ensuring secured premise
Cost.
The content of the invention
The deficiencies in the prior art are solved it is an object of the invention to provide a kind of basement supporting construction.
The present invention sets arch brace in the middle part of basement, and arch brace area is 30~80m2, arch brace center is
At the centre of form of basement geometry, arch brace is highly 500~700mm, and arch brace width is 250~300mm.
Basement set right-angled intersection to support beam, right-angled intersection to support beam crosspoint basement geometry the centre of form
Place.Right-angled intersection is 600~800mm to support depth of beam, and right-angled intersection is 250~300mm to support beam width.
Arch brace and right-angled intersection set steel lattice column to support beam crossover sites, and steel lattice column insertion engineering pile 500~
600mm, steel lattice column is higher by concrete and beared down on one top surface of the beam 0.7~0.9m of absolute altitude, and prestressed stretch-draw pier is set above steel lattice column.
Basement fender post uses cast-in-situ bored pile；Cast-in-situ bored pile periphery sets cement mixing pile water stopping curtain, cement
The a diameter of 500mm of cement mixing pile that stirring pile water stopping curtain is used, adjacent cement mixing pile is mutually twisted 300~400mm；
Concrete capping beam is set at the top of cast-in-situ bored pile, and concrete bears down on one beam width for 300mm, is highly 500~600mm；It is local
When lower room cutting depth is more than or equal to 3.5m, concrete breast beam is set, and concrete breast beam set location is vertical in the middle part of basement
It is identical with concrete capping beam in plane, concrete breast beam width is 300mm, is highly 500~600mm.
When basement cutting depth is less than or equal to 3.5m, vertical plane uses row's supporting construction, in right-angled intersection pair
Support the span of beam top 1/8,1/4 span, 3/4 span and 7/8 span position and drawknot node on steel suspension cable is set, in right-angled intersection to support
The span of beam bottom 3/8,1/2 span and 5/8 span position set drawknot node under steel suspension cable, and span refers to right-angled intersection to support here
Beam is with concrete capping beam crosspoint and arch brace with right-angled intersection to the distance between support beam crosspoint.Steel suspension cable is using pre-
Stress tension.
When basement cutting depth is more than 3.5m, vertical plane uses two row's supporting construction；First row supporting construction exists
Right-angled intersection sets drawknot node on steel suspension cable to the span of support beam top 1/8,1/4 span, 3/4 span and 7/8 span position, ten
The span of word cross-pair support beam bottom 3/8,1/2 span and 5/8 span position set drawknot node under steel suspension cable, and four corners set mixed
Solidifying soil Bars In Poured Concrete Slab, concrete cast-in-situ plate suqare is more than or equal to 5m2, concrete cast-in-situ plate thickness is 12~15mm, and arrangement of reinforcement is using straight
Footpath is 12~14mm；Because stress concentration occurs in four corners of first row supporting construction, there is provided concrete cast-in-place slab can
Effectively to alleviate the stress at these positions.Second row supporting construction is arranged at the 1/2 of cutting depth, second row supporting construction
Drawknot node on steel suspension cable is set to the span of support beam top 1/8,1/4 span, 3/4 span and 7/8 span position in right-angled intersection,
Right-angled intersection sets drawknot node under steel suspension cable to the span of support beam bottom 3/8,1/2 span and 5/8 span position, and steel suspension cable is using pre-
Stress tension；Steel pipe is set between arch brace and concrete capping beam to support.
When basement cutting depth is more than 3.5m, construction procedure includes：
(1) construction fender post；
(2) concrete capping beam is set at the top of fender post；
(3) when setting the Construction of Engineering Pile of steel lattice column, steel lattice column is inserted when engineering pile concrete is unhardened；
(4) first row arch brace and first row right-angled intersection are poured to support beam concrete；
(5) concrete cast-in-place slab of first row supporting construction is poured；
(6) the steel suspension cable drawknot node of first row supporting construction is set；Right-angled intersection is to support beam top main reinforcement welded suspending hook
It is used as drawknot node on steel suspension cable；Drawknot node sets as follows under steel suspension cable：Right-angled intersection sets the small pipe of oblique plastics to supportting in beam,
Steel suspension cable is in the small pipe of oblique plastics, and right-angled intersection is used as drawknot node under steel suspension cable to support beam bottom main reinforcement welded suspending hook；
(7) prestressed stretch-draw is carried out to the steel suspension cable of first row supporting construction；
Tension sequence is using as follows：Using three tensioning, first time tensioning parameter is using as follows：Pretensioning arch brace model
Enclose the steel suspension cable of interior upper drawknot node, then between tensioning arch brace and concrete capping beam in the range of upper drawknot node steel suspension cable,
Then the steel suspension cable of drawknot node, scope between last tensioning arch brace and concrete capping beam are descended in the range of tensioning arch brace
The steel suspension cable of interior lower drawknot node, tension stress uses the 30% of total tension stress.Second of tensioning parameter is using as follows：Pretensioning
The steel suspension cable of upper drawknot node in the range of arch brace, then between tensioning arch brace and concrete capping beam in the range of upper drawknot node
Steel suspension cable, then in the range of tensioning arch brace lower drawknot node steel suspension cable, last tensioning arch brace bears down on one with concrete
The steel suspension cable of lower drawknot node in the range of between beam, tension stress uses the 60% of total tension stress.Third time tensioning parameter is used
It is as follows：The steel suspension cable of upper drawknot node in the range of pretensioning arch brace, then model between tensioning arch brace and concrete capping beam
The steel suspension cable of interior upper drawknot node is enclosed, the steel suspension cable of drawknot node, last tensioning arch brace are then descended in the range of tensioning arch brace
The steel suspension cable of lower drawknot node in the range of between concrete capping beam, tension stress uses the 100% of total tension stress.
For different earth excavation depth and different spans, using different total stretching forces, as shown in table 1, different opens
Dig depth or different spans determines total stretching force according to interpolation method.
Total stretching force under the different situations of table 1
(8) 2cm below earth excavation to second row supporting construction bottom absolute altitude；
(9) casting concrete waist rail；
(10) second row arch brace and right-angled intersection are poured to support beam concrete；
(11) steel pipe of second row supporting construction is set to support；
(12) the steel suspension cable drawknot node of second row supporting construction is set；Right-angled intersection is to support beam top main reinforcement welded suspending hook
It is used as drawknot node on steel suspension cable；Drawknot node sets as follows under steel suspension cable：Right-angled intersection sets the small pipe of oblique plastics to supportting in beam,
Steel suspension cable is in the small pipe of oblique plastics, and drawknot node is welded on right-angled intersection to support beam bottom main reinforcement under steel suspension cable；
(13) prestressed stretch-draw is carried out to the steel suspension cable of second row supporting construction；The steel suspension cable tensioning of second row supporting construction
Parameter is identical with the steel suspension cable tensioning parameter of first row supporting construction；
(14) earthwork between second row arch brace and concrete breast beam is excavated to basement bottom board bottom absolute altitude；Retain the
The earthwork is conducive to basement stable to form central island effect in the range of two row's arch braces；
(15) basement bottom board and sidewall of basement between second row arch brace and concrete breast beam are poured；In annulus
The basement bottom board of support zone sets steel plate water stopper；
(16) earthwork is excavated in the range of second row arch brace to basement bottom board bottom absolute altitude；
(17) basement bottom board in the range of second row arch brace is poured；
(18) the steel suspension cable of second row supporting construction is first removed, then removes second row arch brace and right-angled intersection to support beam
Concrete；
(19) the steel suspension cable of first row supporting construction is first removed, then removes first row arch brace and right-angled intersection to support beam
Concrete.
When basement cutting depth is less than or equal to 3.5m, construction procedure includes：
(1) construction fender post；
(2) concrete capping beam is set at the top of fender post；
(3) when setting the Construction of Engineering Pile of steel lattice column, steel lattice column is inserted when engineering pile concrete is unhardened；
(4) arch brace and right-angled intersection are poured to support beam concrete；
(5) concrete cast-in-place slab of supporting construction is poured；
(6) the steel suspension cable drawknot node of supporting construction is set；Right-angled intersection is used as steel to support beam top main reinforcement welded suspending hook
Drawknot node on suspension cable；Drawknot node sets as follows under steel suspension cable：Right-angled intersection in support beam to setting the small pipe of oblique plastics, steel suspension cable
In the small pipe of oblique plastics, right-angled intersection is used as drawknot node under steel suspension cable to support beam bottom main reinforcement welded suspending hook；
(7) prestressed stretch-draw is carried out to the steel suspension cable of supporting construction；
Tension sequence is using as follows：Using three tensioning, first time tensioning parameter is using as follows：Pretensioning arch brace model
Enclose the steel suspension cable of interior upper drawknot node, then between tensioning arch brace and concrete capping beam in the range of upper drawknot node steel suspension cable,
Then the steel suspension cable of drawknot node, scope between last tensioning arch brace and concrete capping beam are descended in the range of tensioning arch brace
The steel suspension cable of interior lower drawknot node, tension stress uses the 30% of total tension stress.Second of tensioning parameter is using as follows：Pretensioning
The steel suspension cable of upper drawknot node in the range of arch brace, then between tensioning arch brace and concrete capping beam in the range of upper drawknot node
Steel suspension cable, then in the range of tensioning arch brace lower drawknot node steel suspension cable, last tensioning arch brace bears down on one with concrete
The steel suspension cable of lower drawknot node in the range of between beam, tension stress uses the 60% of total tension stress.Third time tensioning parameter is used
It is as follows：The steel suspension cable of upper drawknot node in the range of pretensioning arch brace, then model between tensioning arch brace and concrete capping beam
The steel suspension cable of interior upper drawknot node is enclosed, the steel suspension cable of drawknot node, last tensioning arch brace are then descended in the range of tensioning arch brace
The steel suspension cable of lower drawknot node in the range of between concrete capping beam, tension stress uses the 100% of total tension stress.
(8) earthwork between arch brace and concrete capping beam is excavated to basement bottom board bottom absolute altitude；Retain annulus branch
The earthwork is to form central island effect in the range of support；
(9) basement bottom board and sidewall of basement between arch brace and concrete capping beam are poured；In arch brace
The basement bottom board at position sets steel plate water stopper；
(10) earthwork is excavated in the range of arch brace to basement bottom board bottom absolute altitude；
(11) basement bottom board in the range of arch brace is poured；
(12) the steel suspension cable of supporting construction is first removed, then removes arch brace and right-angled intersection to support beam concrete.
The present invention has the advantages that construction safety is reliable, cost is low.
Brief description of the drawings
Fig. 1, row's supporting construction elevational schematic view, Fig. 2, two row's supporting construction elevational schematic views, Fig. 3, row's supporting knot
Structure floor map, Fig. 4, two row's supporting construction floor map, Fig. 5, right-angled intersection are to support beam bending moment envelope diagram.
In each accompanying drawing：1st, concrete capping beam, 2, right-angled intersection to support beam, 3, steel lattice column, 4, concrete cast-in-place slab, 5,
Concrete breast beam, 6, steel pipe to support, 7, steel suspension cable, 8, prestressed stretch-draw pier.
Embodiment
Embodiment one
The present embodiment sets arch brace in the middle part of basement, and arch brace area is 50m2, arch brace center is ground
At the centre of form of lower room geometry, arch brace is highly 600mm, and arch brace width is 300mm.
Basement set right-angled intersection to support beam 2, right-angled intersection to support beam 2 crosspoint basement geometry shape
At the heart.Right-angled intersection is 700mm to the support height of beam 2, and right-angled intersection is 300mm to the support width of beam 2.
Arch brace sets steel lattice column 3, the insertion engineering pile of steel lattice column 3 to the support crossover sites of beam 2 with right-angled intersection
600mm, steel lattice column 3 is higher by the top surface absolute altitude 0.8m of concrete capping beam 1, and steel lattice column 3 sets prestressed stretch-draw pier 8 above.
Basement fender post uses cast-in-situ bored pile；Cast-in-situ bored pile periphery sets cement mixing pile water stopping curtain, cement
The a diameter of 500mm of cement mixing pile that stirring pile water stopping curtain is used, adjacent cement mixing pile is mutually twisted 350mm；Drilling
Concrete capping beam 1 is set at the top of bored concrete pile, and the width of concrete capping beam 1 is 300mm, is highly 600mm.
Basement cutting depth is 3m, and vertical plane uses row's supporting construction, in right-angled intersection to support beam 2 top 1/8
Span, 1/4 span, 3/4 span and 7/8 span position set drawknot node on steel suspension cable 7, in right-angled intersection to support beam 2 bottom 3/8
Span, 1/2 span and 5/8 span position set steel 7 times drawknot nodes of suspension cable, and the drawknot node set location of steel suspension cable 7 is according to moment of flexure
Envelope diagram and obtain, these positions carry out prestressing force drawknot can make right-angled intersection to support the bending moment envelope diagram of beam 2 it is more reasonable；
Right-angled intersection is converted to pulling force to the support axle power of beam 2 by the prestressing force drawknot of steel suspension cable 7 and pass to steel lattice column 3.Steel suspension cable 7
Using prestressed stretch-draw.Four corners set concrete cast-in-place slab 4, and the area of concrete cast-in-place slab 4 is 8m2, concrete cast-in-place slab 4
Thickness is 12~15mm, and arrangement of reinforcement uses a diameter of 12~14mm.
Construction procedure includes：
(1) construction fender post；
(2) concrete capping beam 1 is set at the top of fender post；
(3) when setting the Construction of Engineering Pile of steel lattice column 3, steel lattice column 3 is inserted when engineering pile concrete is unhardened；
(4) arch brace and right-angled intersection are poured to the support concrete of beam 2；
(5) concrete cast-in-place slab 4 of supporting construction is poured；
(6) drawknot node of steel suspension cable 7 of supporting construction is set；Right-angled intersection is to the support top main reinforcement welded suspending hook conduct of beam 2
Drawknot node on steel suspension cable 7；7 times drawknot nodes of steel suspension cable set as follows：Right-angled intersection sets the small pipe of oblique plastics to supportting in beam 2,
Steel suspension cable 7 is in the small pipe of oblique plastics, and right-angled intersection is used as 7 times drawknots of steel suspension cable to the support bottom main reinforcement welded suspending hook of beam 2
Point；
(7) prestressed stretch-draw is carried out to the steel suspension cable 7 of supporting construction；
Tension sequence is using as follows：Using three tensioning, first time tensioning parameter is using as follows：Pretensioning arch brace model
Enclose the steel suspension cable 7 of interior upper drawknot node, then between tensioning arch brace and concrete capping beam 1 in the range of upper drawknot node steel suspension cable
7, the steel suspension cable 7 of drawknot node is then descended in the range of tensioning arch brace, between last tensioning arch brace and concrete capping beam 1
In the range of lower drawknot node steel suspension cable 7, tension stress uses the 30% of total tension stress.Second of tensioning parameter is using as follows：
The steel suspension cable 7 of upper drawknot node in the range of pretensioning arch brace, then between tensioning arch brace and concrete capping beam 1 in the range of
The steel suspension cable 7 of upper drawknot node, then in the range of tensioning arch brace lower drawknot node steel suspension cable 7, last tensioning arch brace with
The steel suspension cable 7 of lower drawknot node in the range of between concrete capping beam 1, tension stress uses the 60% of total tension stress.For the third time
Tensioning parameter is using as follows：The steel suspension cable 7 of upper drawknot node in the range of pretensioning arch brace, then tensioning arch brace and concrete
The steel suspension cable 7 of drawknot node in the range of between capping beam 1, then descends the steel suspension cable 7 of drawknot node, most in the range of tensioning arch brace
The steel suspension cable 7 of lower drawknot node in the range of between post-stretching arch brace and concrete capping beam 1, tension stress should using total tensioning
The 100% of power.Total stretching force uses 1.417MPa.
(8) earthwork between arch brace and concrete capping beam 1 is excavated to basement bottom board bottom absolute altitude；Retain annulus branch
The earthwork is to form central island effect in the range of support；
(9) basement bottom board and sidewall of basement between arch brace and concrete capping beam 1 are poured；In arch brace
The basement bottom board at position sets steel plate water stopper；
(10) earthwork is excavated in the range of arch brace to basement bottom board bottom absolute altitude；
(11) basement bottom board in the range of arch brace is poured；
(12) the steel suspension cable 7 of supporting construction is first removed, then removes arch brace and right-angled intersection to the support concrete of beam 2.
Embodiment two
The present embodiment sets arch brace in the middle part of basement, and arch brace area is 50m2, arch brace center is ground
At the centre of form of lower room geometry, arch brace is highly 600mm, and arch brace width is 300mm.
Basement set right-angled intersection to support beam 2, right-angled intersection to support beam 2 crosspoint basement geometry shape
At the heart.Right-angled intersection is 700mm to the support height of beam 2, and right-angled intersection is 300mm to the support width of beam 2.
Arch brace sets steel lattice column 3, the insertion engineering pile of steel lattice column 3 to the support crossover sites of beam 2 with right-angled intersection
600mm, steel lattice column 3 is higher by the top surface absolute altitude 0.8m of concrete capping beam 1, and steel lattice column 3 sets prestressed stretch-draw pier 8 above.
Basement fender post uses cast-in-situ bored pile；Cast-in-situ bored pile periphery sets cement mixing pile water stopping curtain, cement
The a diameter of 500mm of cement mixing pile that stirring pile water stopping curtain is used, adjacent cement mixing pile is mutually twisted 350mm；Drilling
Concrete capping beam 1 is set at the top of bored concrete pile, and the width of concrete capping beam 1 is 300mm, is highly 600mm；When basement is excavated
When depth is more than or equal to 3.5m, concrete breast beam 5 is set, and the set location of concrete breast beam 5 is in vertical plane in the middle part of basement
It is identical with concrete capping beam 1, the width of concrete breast beam 5 is 300mm, is highly 600mm.
When basement cutting depth is 4.8m, vertical plane uses two row's supporting construction；First row supporting construction is in cross
The span of 2 top of cross-pair support beam 1/8,1/4 span, 3/4 span and 7/8 span position set drawknot node on steel suspension cable 7, in cross
The span of 2 bottom of cross-pair support beam 3/8,1/2 span and 5/8 span position set steel 7 times drawknot nodes of suspension cable, and four corners set mixed
Solidifying soil Bars In Poured Concrete Slab 4, the area of concrete cast-in-place slab 4 is 8m2, the thickness of concrete cast-in-place slab 4 is 12~15mm, and arrangement of reinforcement is using a diameter of
12~14mm.Second row supporting construction is arranged at the 1/2 of cutting depth, and second row supporting construction is in right-angled intersection to support beam 2
The span of top 1/8,1/4 span, 3/4 span and 7/8 span position set drawknot node on steel suspension cable 7, in right-angled intersection to support beam 2
The span of bottom 3/8,1/2 span and 5/8 span position set steel 7 times drawknot nodes of suspension cable, and steel suspension cable 7 uses prestressed stretch-draw.
Steel pipe is set between arch brace and concrete capping beam 1 to support 6.
Construction procedure includes：
(1) construction fender post；
(2) concrete capping beam 1 is set at the top of fender post；
(3) when setting the Construction of Engineering Pile of steel lattice column 3, steel lattice column 3 is inserted when engineering pile concrete is unhardened；
(4) first row arch brace and first row right-angled intersection are poured to the support concrete of beam 2；
(5) concrete cast-in-place slab 4 of first row supporting construction is poured；
(6) drawknot node of steel suspension cable 7 of first row supporting construction is set；Right-angled intersection is hung to the top main reinforcement welding of support beam 2
Hook is used as drawknot node on steel suspension cable 7；7 times drawknot nodes of steel suspension cable set as follows：Right-angled intersection in support beam 2 to setting oblique plastics small
Pipe, steel suspension cable 7 is in the small pipe of oblique plastics, and right-angled intersection is to the support bottom main reinforcement welded suspending hook of beam 2 as under steel suspension cable 7
Drawknot node；
(7) prestressed stretch-draw is carried out to the steel suspension cable 7 of first row supporting construction；
Tension sequence is using as follows：Using three tensioning, first time tensioning parameter is using as follows：Pretensioning arch brace model
Enclose the steel suspension cable 7 of interior upper drawknot node, then between tensioning arch brace and concrete capping beam 1 in the range of upper drawknot node steel suspension cable
7, the steel suspension cable 7 of drawknot node is then descended in the range of tensioning arch brace, between last tensioning arch brace and concrete capping beam 1
In the range of lower drawknot node steel suspension cable 7, tension stress uses the 30% of total tension stress.Second of tensioning parameter is using as follows：
The steel suspension cable 7 of upper drawknot node in the range of pretensioning arch brace, then between tensioning arch brace and concrete capping beam 1 in the range of
The steel suspension cable 7 of upper drawknot node, then in the range of tensioning arch brace lower drawknot node steel suspension cable 7, last tensioning arch brace with
The steel suspension cable 7 of lower drawknot node in the range of between concrete capping beam 1, tension stress uses the 60% of total tension stress.For the third time
Tensioning parameter is using as follows：The steel suspension cable 7 of upper drawknot node in the range of pretensioning arch brace, then tensioning arch brace and concrete
The steel suspension cable 7 of drawknot node in the range of between capping beam 1, then descends the steel suspension cable 7 of drawknot node, most in the range of tensioning arch brace
The steel suspension cable 7 of lower drawknot node in the range of between post-stretching arch brace and concrete capping beam 1, tension stress should using total tensioning
The 100% of power.Total stretching force uses 0.907MPa.
(8) 2cm below earth excavation to second row supporting construction bottom absolute altitude；
(9) casting concrete waist rail 5；
(10) second row arch brace and right-angled intersection are poured to the support concrete of beam 2；
(11) steel pipe of second row supporting construction is set to support 6；
(12) drawknot node of steel suspension cable 7 of second row supporting construction is set；Right-angled intersection is hung to the top main reinforcement welding of support beam 2
Hook is used as drawknot node on steel suspension cable 7；7 times drawknot nodes of steel suspension cable set as follows：Right-angled intersection in support beam 2 to setting oblique plastics small
Pipe, steel suspension cable 7 is in the small pipe of oblique plastics, and 7 times drawknot nodes of steel suspension cable are welded on right-angled intersection to the support main steel in the bottom of beam 2
Muscle；
(13) prestressed stretch-draw is carried out to the steel suspension cable 7 of second row supporting construction；The steel suspension cable of second row supporting construction 7
Draw parameter identical with the tensioning parameter of steel suspension cable 7 of first row supporting construction；
(14) earthwork between second row arch brace and concrete breast beam 5 is excavated to basement bottom board bottom absolute altitude；Retain
The earthwork is conducive to basement stable to form central island effect in the range of second row arch brace；
(15) basement bottom board and sidewall of basement between second row arch brace and concrete breast beam 5 are poured；In circle
The basement bottom board of ring support zone sets steel plate water stopper；
(16) earthwork is excavated in the range of second row arch brace to basement bottom board bottom absolute altitude；
(17) basement bottom board in the range of second row arch brace is poured；
(18) the steel suspension cable 7 of second row supporting construction is first removed, then removes second row arch brace and right-angled intersection to support
The concrete of beam 2；
(19) the steel suspension cable 7 of first row supporting construction is first removed, then removes first row arch brace and right-angled intersection to support
The concrete of beam 2.
Claims (7)
1. a kind of basement supporting construction, it is characterized in that set arch brace in the middle part of basement, arch brace area is 30~
80m2, arch brace center is that at the centre of form of basement geometry, arch brace is highly 500~700mm, and arch brace is wide
Spend for 250~300mm；
Basement sets right-angled intersection to support beam, and right-angled intersection is to supportting the crosspoint of beam at the centre of form of basement geometry；
Right-angled intersection is 600~800mm to support depth of beam, and right-angled intersection is 250~300mm to support beam width；
Arch brace and right-angled intersection set steel lattice column to support beam crossover sites, and steel lattice column insertion engineering pile 500~
600mm, steel lattice column is higher by concrete and beared down on one top surface of the beam 0.7~0.9m of absolute altitude, and prestressed stretch-draw pier is set above steel lattice column；
Basement fender post uses cast-in-situ bored pile；Cast-in-situ bored pile periphery sets cement mixing pile water stopping curtain；Drill-pouring
Stake top portion sets concrete capping beam, and concrete bears down on one beam width for 300mm, is highly 500~600mm；When basement is excavated
When depth is more than or equal to 3.5m, concrete breast beam is set in the middle part of basement, concrete breast beam set location in vertical plane with
Concrete capping beam is identical, and concrete breast beam width is 300mm, is highly 500~600mm；
When basement cutting depth is less than or equal to 3.5m, vertical plane uses row's supporting construction, in right-angled intersection to support beam
The span of top 1/8,1/4 span, 3/4 span and 7/8 span position set drawknot node on steel suspension cable, in right-angled intersection under support beam
The span of portion 3/8,1/2 span and 5/8 span position set drawknot node under steel suspension cable；Steel suspension cable uses prestressed stretch-draw；Four angles
Portion sets concrete cast-in-place slab；
When basement cutting depth is more than 3.5m, vertical plane uses two row's supporting construction；First row supporting construction is in cross
The span of cross-pair support beam top 1/8,1/4 span, 3/4 span and 7/8 span position set drawknot node on steel suspension cable, are handed in cross
Fork sets drawknot node under steel suspension cable to the span of support beam bottom 3/8,1/2 span and 5/8 span position, and four corners set concrete
Bars In Poured Concrete Slab；Second row supporting construction is arranged at the 1/2 of cutting depth, and second row supporting construction is in right-angled intersection to support beam top
1/8 span, 1/4 span, 3/4 span and 7/8 span position set drawknot node on steel suspension cable, in right-angled intersection to support beam bottom 3/
8 spans, 1/2 span and 5/8 span position set drawknot node under steel suspension cable, and steel suspension cable uses prestressed stretch-draw；In arch brace
Steel pipe is set between concrete capping beam to support.
2. basement supporting construction according to claim 1, it is characterized in that the water that cement mixing pile water stopping curtain is used
The a diameter of 500mm of mud mixing pile, adjacent cement mixing pile is mutually twisted 300~400mm.
3. basement supporting construction according to claim 1, it is characterized in that concrete cast-in-situ plate suqare is more than or equal to 5m2.It is mixed
It is 12~15mm to coagulate native cast-in-place plate thickness, and arrangement of reinforcement uses a diameter of 12~14mm.
4. basement supporting construction according to claim 1, it is characterized in that when basement cutting depth is more than 3.5m, applying
Work step includes suddenly：
(1) construction fender post；
(2) concrete capping beam is set at the top of fender post；
(3) when setting the Construction of Engineering Pile of steel lattice column, steel lattice column is inserted when engineering pile concrete is unhardened；
(4) first row arch brace and first row right-angled intersection are poured to support beam concrete；
(5) concrete cast-in-place slab of first row supporting construction is poured；
(6) the steel suspension cable drawknot node of first row supporting construction is set；Right-angled intersection is to support beam top main reinforcement welded suspending hook conduct
Drawknot node on steel suspension cable；Drawknot node sets as follows under steel suspension cable：Right-angled intersection in support beam to setting the small pipe of oblique plastics, and steel hangs
Rope is in the small pipe of oblique plastics, and right-angled intersection is used as drawknot node under steel suspension cable to support beam bottom main reinforcement welded suspending hook；
(7) prestressed stretch-draw is carried out to the steel suspension cable of first row supporting construction；
(8) 2cm below earth excavation to second row supporting construction bottom absolute altitude；
(9) casting concrete waist rail；
(10) second row arch brace and right-angled intersection are poured to support beam concrete；
(11) steel pipe of second row supporting construction is set to support；
(12) the steel suspension cable drawknot node of second row supporting construction is set；Right-angled intersection is to support beam top main reinforcement welded suspending hook conduct
Drawknot node on steel suspension cable；Drawknot node sets as follows under steel suspension cable：Right-angled intersection in support beam to setting the small pipe of oblique plastics, and steel hangs
Rope is in the small pipe of oblique plastics, and drawknot node is welded on right-angled intersection to support beam bottom main reinforcement under steel suspension cable；
(13) prestressed stretch-draw is carried out to the steel suspension cable of second row supporting construction；The steel suspension cable tensioning parameter of second row supporting construction
It is identical with the steel suspension cable tensioning parameter of first row supporting construction；
(14) earthwork between second row arch brace and concrete breast beam is excavated to basement bottom board bottom absolute altitude；Retain second row
The earthwork is conducive to basement stable to form central island effect in the range of arch brace；
(15) basement bottom board and sidewall of basement between second row arch brace and concrete breast beam are poured；In arch brace
The basement bottom board at position sets steel plate water stopper；
(16) earthwork is excavated in the range of second row arch brace to basement bottom board bottom absolute altitude；
(17) basement bottom board in the range of second row arch brace is poured；
(18) the steel suspension cable of second row supporting construction is first removed, then removes second row arch brace and right-angled intersection to support beam coagulation
Soil；
(19) the steel suspension cable of first row supporting construction is first removed, then removes first row arch brace and right-angled intersection to support beam coagulation
Soil.
5. basement supporting construction according to claim 1, it is characterized in that when basement cutting depth is less than or equal to 3.5m
When, construction procedure includes：
(1) construction fender post；
(2) concrete capping beam is set at the top of fender post；
(3) when setting the Construction of Engineering Pile of steel lattice column, steel lattice column is inserted when engineering pile concrete is unhardened；
(4) first row arch brace and first row right-angled intersection are poured to support beam concrete；
(5) concrete cast-in-place slab of first row supporting construction is poured；
(6) the steel suspension cable drawknot node of first row supporting construction is set；Right-angled intersection is to support beam top main reinforcement welded suspending hook conduct
Drawknot node on steel suspension cable；Drawknot node sets as follows under steel suspension cable：Right-angled intersection in support beam to setting the small pipe of oblique plastics, and steel hangs
Rope is in the small pipe of oblique plastics, and right-angled intersection is used as drawknot node under steel suspension cable to support beam bottom main reinforcement welded suspending hook；
(7) prestressed stretch-draw is carried out to the steel suspension cable of first row supporting construction；
(8) earthwork between arch brace and concrete capping beam is excavated to basement bottom board bottom absolute altitude；Retain arch brace model
The interior earthwork is enclosed to form central island effect；
(9) basement bottom board and sidewall of basement between arch brace and concrete capping beam are poured；At arch brace position
Basement bottom board set steel plate water stopper；
(10) earthwork is excavated in the range of arch brace to basement bottom board bottom absolute altitude；
(11) basement bottom board in the range of arch brace is poured.
(12) the steel suspension cable of supporting construction is first removed, then removes arch brace and right-angled intersection to support beam concrete.
6. basement supporting construction according to claim 1, it is characterized in that tension sequence is using as follows：Using three times
Draw, first time tensioning parameter is using as follows：The steel suspension cable of upper drawknot node in the range of pretensioning arch brace, then tensioning arch brace
The steel suspension cable of upper drawknot node in the range of between concrete capping beam, then the steel of lower drawknot node hangs in the range of tensioning arch brace
Rope, between last tensioning arch brace and concrete capping beam in the range of lower drawknot node steel suspension cable, tension stress is using total
The 30% of tension；Second of tensioning parameter is using as follows：The steel suspension cable of upper drawknot node in the range of pretensioning arch brace, then open
The steel suspension cable of upper drawknot node in the range of between arch brace and concrete capping beam is drawn, is then pulled down in the range of tensioning arch brace
The steel suspension cable of node, between last tensioning arch brace and concrete capping beam in the range of lower drawknot node steel suspension cable, tensioning should
Power uses the 60% of total tension stress；Third time tensioning parameter is using as follows：Upper drawknot node in the range of pretensioning arch brace
The steel suspension cable of drawknot node is gone up in the range of between steel suspension cable, then tensioning arch brace and concrete capping beam, then tensioning annulus branch
The steel suspension cable of lower drawknot node in the range of support, between last tensioning arch brace and concrete capping beam in the range of lower drawknot node steel
Suspension cable, tension stress uses the 100% of total tension stress.
7. basement supporting construction according to claim 1, it is characterized in that for different earth excavation depth and it is different across
Degree, using different total stretching forces, as shown in table 1, different cutting depths or different spans are determined according to interpolation method
Total stretching force；
Total stretching force under the different situations of table 1
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| CN201810920784.8A CN108951654B (en) | 2017-07-30 | 2017-07-30 | Support construction method for basements with different excavation depths |
| CN201710635355.1A CN107227741B (en) | 2017-07-30 | 2017-07-30 | Basement supporting construction |
| CN201810927295.5A CN108951655B (en) | 2017-07-30 | 2017-07-30 | Basement supporting structure under prestress tensioning condition |
| CN201810920743.9A CN108930273B (en) | 2017-07-30 | 2017-07-30 | Basement supporting construction method |
| CN201810920824.9A CN108930274B (en) | 2017-07-30 | 2017-07-30 | Basement supporting construction method |
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| CN201810920824.9A Division CN108930274B (en) | 2017-07-30 | 2017-07-30 | Basement supporting construction method |
| CN201810920743.9A Division CN108930273B (en) | 2017-07-30 | 2017-07-30 | Basement supporting construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487261A (en) * | 2018-04-10 | 2018-09-04 | 江西科技学院 | A kind of arch steel structure support |
| CN107605172B (en) * | 2017-10-16 | 2020-04-17 | 叶长青 | Construction method for reinforcing structure of concrete roof beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110397042A (en) * | 2019-07-13 | 2019-11-01 | 济邦建设集团有限公司 | A kind of support system of deep basal pit |
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Also Published As
| Publication number | Publication date |
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| CN108951655A (en) | 2018-12-07 |
| CN107227741B (en) | 2018-12-14 |
| CN108930274A (en) | 2018-12-04 |
| CN108951654B (en) | 2020-09-15 |
| CN108951655B (en) | 2020-09-15 |
| CN108930273A (en) | 2018-12-04 |
| CN108930274B (en) | 2020-10-27 |
| CN108951654A (en) | 2018-12-07 |
| CN108930273B (en) | 2020-09-15 |
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