Irregular basement support structure
Technical field
The present invention relates to a kind of irregular basement support structures, are suitable for building field.
Background technique
In recent years with the rapid development of urban engineering construction, a large amount of deep basement engineering has been emerged in large numbers.Basement supporting knot
Structure must also meet deformation requirements in addition to meeting self-strength requirement, so that the design and construction of basement engineering be made to carry out by force
Degree and deformation double control.For irregular basement, safety precaution is very difficult, and using inner support, not only cost is high merely,
Construction speed is also undesirable.It can be supported in conjunction with the good load-carrying properties of ring beam, using waist rail as the transmitting structure of support
Part.But bracing members and waist rail are often oblique in irregular basement, when bracing members and waist rail oblique, when supporting stress
Horizontal component can be being generated along waist rail direction, failure by shear is easy to appear between waist rail and enclosure wall or fender post.
Summary of the invention
The present invention is to overcome prior art problem, provides a kind of irregular basement support structure, applies basement safely
Work.
For this purpose, irregular basement support structure provided by the invention, waist rail is arranged in enclosure wall inside, and first of waist rail is adopted
With armored concrete, position following 50cm~80cm at the top of enclosure wall, second waist rail or following is arranged in first of waist rail
Waist rail uses steel member.First of waist rail can suitably be reinforced as the interim garage that constructs using armored concrete by regional area
Road facilitates constructing operation.It is to accelerate construction progress and saving engineering and make that second waist rail or following waist rail, which use steel member,
Valence.Ring beam is set on the inside of waist rail, and ring beam height is 500mm~700mm, and ring beam width is 250mm~300mm, basement middle part
By moment of flexure and shear it is very big, using truss to support in the middle part of basement, truss to support can also reduce waist rail support span and
Alleviate the stress of waist rail.
The horizontally-supported clear distance between underground structure floor and basement bottom board is 600~800mm, the cloth of the road Xia support
It sets under the conditions of not influencing main structure construction and earth excavation, should reduce as far as possible to reach best stressed effect, the road Xia branch
It supports with a distance from basement bottom board as 300~400mm.When the thickness of sole plate is greater than 900mm, the support of the road Xia is retained in ground
In the bottom plate of lower room.
Reinforced concrete waist rail is connect with enclosure wall one-piece casting, can be multiplied by amplitude modulation reduction coefficient to support moment is calculated
0.85~0.95, but mid span moment is increase accordingly to 1.05~1.15.The cross-sectional width of reinforced concrete waist rail is greater than its water
1/10 to effective span is put down, cross-sectional width should be greater than depth of section, and depth of section is greater than the depth of section of support.Reinforcing bar
The longitudinal reinforcement diameter of concrete breast beam be greater than or be equal to 20mm, be greater than along the maximum spacing of section surrounding longitudinal reinforcement or
Equal to 300mm.Stirrup diameter is greater than or is equal to 8mm, and spacing is greater than or is equal to 250mm.
It is greater than the basement of 40m for span, truss support will consider the influence of temperature change, rule of thumb provide with actual measurement
Material, truss support will increase by 8%~10% internal force load.
Steel pipe, fashioned iron, I-steel or channel steel and combinations thereof component can be used in bracing members.In bracing members, the node of steel waist rail
Or angular position, the edge of a wing of Steel section member and ventral margin are welded with steel stiffener, the thickness of steel stiffener is greater than or equal to 10mm, weldering
Seam height is greater than or equal to 6mm.
When there is external corner in irregular basement, it may occur that stress concentration phenomenon, this position, which is easy to appear, to be collapsed, especially
That first of horizontally-supported stress can be very big, first of horizontally-supported basement external corner part add concrete cast-in-place slab into
Row is reinforced, and concrete cast-in-place slab controls position deformation with a thickness of 10mm~15mm.Basement internal corner part uses bracing members.
Second is horizontally-supported and other support basement external corner parts or internal corner part to be all made of bracing members.To the hole other places at external corner
Base carries out grouting and reinforcing, improves and cheats outer soil strength, to reduce the lateral pressure of enclosure wall.
When bracing members and waist rail oblique, horizontal component can generated along waist rail direction when stress by supporting, to transmit this water
Shear transfer device need to be arranged in flat power between waist rail and enclosure wall or fender post.
Enclosure wall is used for building enclosure, for enclosure wall with a thickness of 300mm~350mm, enclosure wall inner surface is embedded pre-
Iron is buried, it is 500mm~600mm that embedded iron, which buries spacing, and embedded iron is with a thickness of 4mm~6mm, embedded iron width and length
200mm~350mm, pre-buried iron surface welding steel shear block, and steel shears block with a thickness of 50mm~60mm, and steel shears block width and length
Degree is 150mm~200mm, and in order to reduce cost, steel shears block and uses the hollow bloom of lattice, between enclosure wall and steel waist rail
Clog pea gravel concreten.Steel waist rail uses fashioned iron, and cross-sectional width is 300mm~500mm, and steel waist rail inner surface welds steel pad
Block, steel cushion block are made into triangle, and steel cushion block surface slope is consistent with the oblique gradient of steel waist rail, and steel cushion block horizontal plane and bracing members hang down
Directly.
Fender post is used for building enclosure, fender post diameter is 600mm~800mm, and the rebar surface of fender post welds
Rebar connector, rebar connector are formed by bar reinforcement annular solder, and bar reinforcement diameter is 28mm or 32mm, rebar connector
Embedded spacing is 500mm~600mm, and rebar connector inner surface welds steel waist rail.It is arranged between fender post and steel waist rail thin
Stone concrete is as filleting.Steel waist rail uses fashioned iron, and cross-sectional width is 300mm~500mm, and steel waist rail inner surface welds steel pad
Block, steel cushion block are made into triangle, and steel cushion block surface slope is consistent with the oblique gradient of steel waist rail, and steel cushion block horizontal plane and bracing members hang down
Directly.
Armpit angle is arranged in support construction junction, to enhance supporting plane rigidity and improve junction stress collected state, armpit
Angle is to wait haunch triangle, and right-angle side diameter is 500mm, and wrist shape shear reinforcement is arranged in support construction junction, and shear reinforcement is straight
Diameter is 25mm, and shear reinforcement transfer angle is 45 °, and horizontal tail edge lengths are 500mm.
In the construction process, it is unearthed for convenience, can be excavated in basement and do interim driveway between bottom and ground.
When basement excavation is deeper, if interim driveway is straight line, the gradient of interim driveway can be too steep.For basement
Safety is excavated, the interim driveway gradient is set as 12 °~15 °, but the interim driveway of straight line may not be able to reach this requirement.
The present invention provides following technical scheme in response to this: interim driveway is made into spirally, interim driveway gradient setting
It is 12 °~15 °, interim driveway top platform is higher by first of support system, and the horizontal power load for avoiding vehicle from generating is straight
It connects and acts on first of support above.Interim driveway and first of support system are detached from, the support rod and branch of interim driveway
The support column distance of support body system is greater than 250mm, avoids influencing each other.Interim driveway uses cast-in-situ bored pile interpolation angle steel lattice
Column is as support rod, and setting level links bar to reduce effective span between support rod, and level links bar setting spacing 1.5m,
Two levels are at least set in one plane and link bar guarantee support system stability.When basement is excavated to second support,
Oblique connecting rod is welded to be reinforced.
Construction safety of the present invention is reliable, and engineering cost is low.
Detailed description of the invention
Fig. 1 is first layer basement support construction, and Fig. 2 is the second layer and other layer of basement support construction, and Fig. 3 is to go along with sb. to guard him
Shear transfer device when structure uses enclosure wall, Fig. 4 are Shear transfer device when building enclosure uses fender post, and Fig. 5 is armpit angle
Reinforce construction.
In each attached drawing: 1, enclosure wall, 2, steel waist rail, 3, ring beam, 4, truss to support, 5, concrete cast-in-place slab, 6, bracing members,
7, embedded iron, 8, steel shearing block, 9, pea gravel concreten, 10, steel cushion block, 11, fender post, 12, rebar connector.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be described in detail.
Embodiment one
Waist rail is set on the inside of enclosure wall 1, and first of waist rail uses armored concrete, and first of waist rail setting position is being gone along with sb. to guard him
The 1 following 50cm~80cm in top of wall, second waist rail or following waist rail use steel member.First of waist rail uses reinforced concrete
Soil can suitably be reinforced by regional area as interim driveway of constructing.Ring beam 3 is set on the inside of waist rail, and 3 height of ring beam is 500mm
~700mm, 3 width of ring beam are 250mm~300mm, use truss to support 4 in the middle part of basement.
The horizontally-supported clear distance between underground structure floor and basement bottom board is 600~800mm, the cloth of the road Xia support
It sets under the conditions of not influencing main structure construction and earth excavation, should reduce as far as possible to reach best stressed effect, the road Xia branch
It supports with a distance from basement bottom board as 300~400mm.When the thickness of sole plate is greater than 900mm, the support of the road Xia is retained in ground
In the bottom plate of lower room.
Reinforced concrete waist rail is connect with 1 one-piece casting of enclosure wall, can be multiplied by amplitude modulation reduction coefficient to support moment is calculated
0.85~0.95, but mid span moment is increase accordingly to 1.05~1.15.The cross-sectional width of reinforced concrete waist rail is greater than its water
1/10 to effective span is put down, cross-sectional width should be greater than depth of section, and depth of section is greater than the depth of section of support.Reinforcing bar
The longitudinal reinforcement diameter of concrete breast beam be greater than or be equal to 20mm, be greater than along the maximum spacing of section surrounding longitudinal reinforcement or
Equal to 300mm.Stirrup diameter is greater than or is equal to 8mm, and spacing is greater than or is equal to 250mm.
It is greater than the basement of 40m for span, truss support will consider the influence of temperature change, and truss support will increase
8%~10% internal force load.
Steel pipe, fashioned iron, I-steel or channel steel and combinations thereof component can be used in bracing members 6.In bracing members 6, the section of steel waist rail 2
Point or angular position, the edge of a wing of Steel section member and ventral margin are welded with steel stiffener, and the thickness of steel stiffener is greater than or equal to 10mm,
Weld bead height is greater than or equal to 6mm.
It adds concrete cast-in-place slab 5 in first of horizontally-supported basement external corner part to be reinforced, concrete cast-in-place slab 5
With a thickness of 10mm~15mm, position deformation is controlled.Basement internal corner part uses bracing members 6.Second it is horizontally-supported and its
He supports basement external corner part or internal corner part to be all made of bracing members 6.Grouting and reinforcing is carried out to ground outside the hole at external corner, is mentioned
Height cheats outer soil strength.
Enclosure wall 1 is used for building enclosure, for enclosure wall 1 with a thickness of 300mm~350mm, 1 inner surface of enclosure wall is embedded
Embedded iron 7, it is 500mm~600mm that embedded iron 7, which buries spacing, and embedded iron 7 is with a thickness of 4mm~6mm, 7 width of embedded iron and length
It is 200mm~350mm, 7 surface of embedded iron welds steel and shears block 8, and steel shears block 8 with a thickness of 50mm~60mm, and steel shears block 8
Width and length are 150mm~200mm, and in order to reduce cost, steel shears block 8 and uses the hollow bloom of lattice, enclosure wall 1 with
Pea gravel concreten 9 is clogged between steel waist rail 2.
Steel waist rail 2 uses fashioned iron, and cross-sectional width is 300mm~500mm, and 2 inner surface of steel waist rail welds steel cushion block 10, steel
Cushion block 10 is made into triangle, and 10 surface slope of steel cushion block is consistent with the oblique gradient of steel waist rail 2,10 horizontal plane of steel cushion block and bracing members
6 is vertical.
Armpit angle is arranged in support construction junction, and armpit angle is to wait haunch triangle, and right-angle side diameter is 500mm, support construction
Wrist shape shear reinforcement is arranged in junction, and shear reinforcement diameter is 25mm, and shear reinforcement transfer angle is 45 °, horizontal tail edge lengths
For 500mm.
Interim driveway is made into spirally, and the interim driveway gradient is set as 12 °~15 °, interim driveway top platform
It is higher by first of support system, the horizontal power load for avoiding vehicle from generating acts directly on first of support above.Interim vehicle
Trade is detached from first of support system, and the support rod of interim driveway and the support column distance of support system are greater than 250mm, is kept away
Exempt to influence each other.As support rod, water is arranged between support rod using cast-in-situ bored pile interpolation angle steel lattice column in interim driveway
Flat to link bar to reduce effective span, level links bar setting spacing 1.5m, two levels is at least arranged even in a plane
Tie-rod guarantees support system stability.When basement is excavated to second support, welds oblique connecting rod and reinforced.
Embodiment two
Waist rail is set on the inside of enclosure wall 1, and first of waist rail uses armored concrete, and first of waist rail setting position is being gone along with sb. to guard him
The 1 following 50cm~80cm in top of wall, second waist rail or following waist rail use steel member.First of waist rail uses reinforced concrete
Soil can suitably be reinforced by regional area as interim driveway of constructing.Ring beam 3 is set on the inside of waist rail, and 3 height of ring beam is 500mm
~700mm, 3 width of ring beam are 250mm~300mm, use truss to support 4 in the middle part of basement.
The horizontally-supported clear distance between underground structure floor and basement bottom board is 600~800mm, the cloth of the road Xia support
It sets under the conditions of not influencing main structure construction and earth excavation, should reduce as far as possible to reach best stressed effect, the road Xia branch
It supports with a distance from basement bottom board as 300~400mm.When the thickness of sole plate is greater than 900mm, the support of the road Xia is retained in ground
In the bottom plate of lower room.
Reinforced concrete waist rail is connect with 1 one-piece casting of enclosure wall, can be multiplied by amplitude modulation reduction coefficient to support moment is calculated
0.85~0.95, but mid span moment is increase accordingly to 1.05~1.15.The cross-sectional width of reinforced concrete waist rail is greater than its water
1/10 to effective span is put down, cross-sectional width should be greater than depth of section, and depth of section is greater than the depth of section of support.Reinforcing bar
The longitudinal reinforcement diameter of concrete breast beam be greater than or be equal to 20mm, be greater than along the maximum spacing of section surrounding longitudinal reinforcement or
Equal to 300mm.Stirrup diameter is greater than or is equal to 8mm, and spacing is greater than or is equal to 250mm.
It is greater than the basement of 40m for span, truss support will consider the influence of temperature change, and truss support will increase
8%~10% internal force load.
Steel pipe, fashioned iron, I-steel or channel steel and combinations thereof component can be used in bracing members 6.In bracing members 6, the section of steel waist rail 2
Point or angular position, the edge of a wing of Steel section member and ventral margin are welded with steel stiffener, and the thickness of steel stiffener is greater than or equal to 10mm,
Weld bead height is greater than or equal to 6mm.
It adds concrete cast-in-place slab 5 in first of horizontally-supported basement external corner part to be reinforced, concrete cast-in-place slab 5
With a thickness of 10mm~15mm, position deformation is controlled.Basement internal corner part uses bracing members 6.Second it is horizontally-supported and its
He supports basement external corner part or internal corner part to be all made of bracing members 6.Grouting and reinforcing is carried out to ground outside the hole at external corner, is mentioned
Height cheats outer soil strength.
Fender post 11 is used for building enclosure, 11 diameter of fender post is 600mm~800mm, the bar list of fender post 11
Face welded reinforcement connector 12, rebar connector 12 is formed by bar reinforcement annular solder, and bar reinforcement diameter is 28mm or 32mm,
It is 500mm~600mm that rebar connector 12, which buries spacing, and 12 inner surface of rebar connector welds steel waist rail 2.Fender post 11 with
Pea gravel concreten 9 is set between steel waist rail 2 and is used as filleting.
Steel waist rail 2 uses fashioned iron, and cross-sectional width is 300mm~500mm, and 2 inner surface of steel waist rail welds steel cushion block 10, steel
Cushion block 10 is made into triangle, and 10 surface slope of steel cushion block is consistent with the oblique gradient of steel waist rail 2,10 horizontal plane of steel cushion block and bracing members
6 is vertical.
Armpit angle is arranged in support construction junction, and armpit angle is to wait haunch triangle, and right-angle side diameter is 500mm, support construction
Wrist shape shear reinforcement is arranged in junction, and shear reinforcement diameter is 25mm, and shear reinforcement transfer angle is 45 °, horizontal tail edge lengths
For 500mm.
Interim driveway is made into spirally, and the interim driveway gradient is set as 12 °~15 °, interim driveway top platform
It is higher by first of support system, the horizontal power load for avoiding vehicle from generating acts directly on first of support above.Interim vehicle
Trade is detached from first of support system, and the support rod of interim driveway and the support column distance of support system are greater than 250mm, is kept away
Exempt to influence each other.As support rod, water is arranged between support rod using cast-in-situ bored pile interpolation angle steel lattice column in interim driveway
Flat to link bar to reduce effective span, level links bar setting spacing 1.5m, two levels is at least arranged even in a plane
Tie-rod guarantees support system stability.When basement is excavated to second support, welds oblique connecting rod and reinforced.