CN107816059A - Sunk type basement constructs - Google Patents
Sunk type basement constructs Download PDFInfo
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- CN107816059A CN107816059A CN201711312464.6A CN201711312464A CN107816059A CN 107816059 A CN107816059 A CN 107816059A CN 201711312464 A CN201711312464 A CN 201711312464A CN 107816059 A CN107816059 A CN 107816059A
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- basement
- sidewall
- reversed beam
- bottom board
- internal cavity
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of sunk type basement construction, it is characterized in that sidewall of basement width is 400~450mm, sidewall of basement bottom sets cutting shoe, and cutting shoe gradient is 50~60 degree, sidewall of basement sets internal cavity, and sidewall of basement internal cavity width is 120~150mm.Basement bottom board bottom absolute altitude is identical with the top mark height of sidewall of basement cutting shoe；Basement bottom board or basement reversed beam are set according to foundation soil strength situation below basement bottom board.Mechanical property of the present invention is good, low cost, short time limit.
Description
Technical field
The present invention relates to a kind of sunk type basement construction, suitable for building field.
Background technology
Traditional Construction of Basement pattern is first to install basement supporting construction, then is cut the earth, then is poured ground
Lower cell structure, because the earth excavation time is longer, basement supporting construction as temporary support structures come ensure to have safely compared with
Big difficulty, basement supporting construction will take a substantial amount of time, and cost is of a relatively high.When how to solve basement structure construction
Duration slow cost height is engineering staff's problem to be faced.
The content of the invention
The present invention is to provide a kind of sunk type basement construction, overcomes fabric structure safety deficiency, cost high, long in time limit
The problem of.
The present invention first pours sidewall of basement, forms peripheral frame by the use of sidewall of basement as basement temporary support structures
Structure, then the sidewall of basement that sinks, treat that sidewall of basement sinks down into specified location, then pour basement floor constructions, basement
Base arrangement construction period can be with the Rotating fields floor of synchronous construction one.
Sidewall of basement width is 400~450mm, and sidewall of basement bottom sets cutting shoe, and cutting shoe gradient is 50~60 degree,
Here gradient refers to cutting shoe inclined-plane and horizontal angle, and sidewall of basement sets internal cavity, and sidewall of basement internal cavity width is
120~150mm.
Basement bottom board bottom absolute altitude is identical with the top mark height of sidewall of basement cutting shoe.Foundation soil is strong below basement bottom board
When degree is more than or equal to 8MPa, basement bottom board is only set；Below basement bottom board foundation soil strength be less than 8MPa and more than etc.
When 2MPa, basement bottom board and basement reversed beam be set, adjacent basement reversed beam spacing is 1.2~1.5m, basement reversed beam
Width is 300mm, and basement reversed beam is highly 250~300mm, and longitudinal basement reversed beam and horizontal basement reversed beam form well
Shape, basement reversed beam are disposed below cement mixing pile, rubber spacer, rubber blanket are set between cement mixing pile and basement reversed beam
Thickness degree is 10~15mm, and the purpose of setting rubber spacer is to reduce rigidity at the top of cement mixing pile, be advantageous to cement mixing
Stake and the common load of soil；When foundation soil strength is less than 2MPa below basement bottom board, set basement bottom board and basement anti-
Beam, adjacent basement reversed beam spacing are 1.4~1.7m, and basement reversed beam width is 300mm, basement reversed beam highly for 300~
400mm, longitudinal basement reversed beam and horizontal basement reversed beam form well shape, and longitudinal basement reversed beam and horizontal basement reversed beam are handed over
Vent, which is put, is disposed below minor diameter prefabricated pile, a diameter of 200~250mm of minor diameter prefabricated pile；
Different technical schemes is used for different soil properties, serves the effect for ensureing safety and saving construction cost, for
Basement bottom board bottom is pan soil soil property, only can meet to require by the pressure-bearing of basement bottom board and ground soil contact face；And
It is weak soil soil property for basement bottom board bottom, must just uses basement process, the technical program provides two kinds of processing methods, right
In relatively hard weak soil, basement process is carried out using minor diameter prefabricated pile, minor diameter prefabricated pile is rigid pile, and it will directly build
Build load and be directly delivered to foundation soil depths.
Basement bottom board bottom is pan soil soil property, i.e., when foundation soil strength is more than or equal to 8MPa, construction procedure is：
(1) sidewall of basement template is installed, indwelling sidewall of basement internal cavity during sidewall of basement formwork erection, in cutting shoe
Position pre-buried steel sludge out pipe, colligation sidewall of basement reinforcing bar, then pours sidewall of basement concrete；
(2) sunk after sidewall of basement concrete reaches design strength 100%, sidewall of basement is used under merogenesis
Heavy, often section sinks apart from being 150cm, and rig is stretched into 150cm below sidewall of basement internal cavity bottom, stirred by rotary drill bit
Loosened the soil body, and injected clear water simultaneously, and is monitored in real time at the top of sidewall of basement, and rig is adjusted according to real-time monitoring result
Drill speed, adjusts slow drill speed when authorities' portion's subsidence velocity is too fast, the control of sidewall of basement subsidence velocity 4mm/min with
It is interior；When sidewall of basement subsidence velocity is more than 4mm/min into, clear water is changed to the friction of mud increase sidewall of basement sinking
Power, mud balance are 1.25~1.35g/cm3；Sidewall of basement subsidence velocity is still more than 4mm/ after if clear water changes mud into
During min, it will often save sinking distance and be reduced to 100~140cm；
(3) the brick fetal membrane of basement bottom board is installed, the reinforcing bar of colligation basement bottom board, pours basement bottom board；
(4) sidewall of basement internal cavity is closed；The steel reinforcement cage of colligation completion is first put into sidewall of basement internal cavity, then
Poured with C30 expansive concretes, accelerated cement slurry, accelerated cement slurry note are first injected before C30 expansive concretes pour
The hole at cutting shoe position can be blocked after entering；
(5) one layer concrete floor of construction；
Closing sidewall of basement internal cavity and a layer concrete floor slab construction can be applied with basement bottom board concrete synchronous
Work is to accelerate progress.
Basement bottom board bottom is weak soil soil property, i.e., when foundation soil strength is less than 8MPa and is more than or equal to 2MPa, construction step
Suddenly it is：
(1) construction cement mixing pile；
Technical parameter is from as follows：Grouting pressure is less than 1.0MPa, and flow rate of grouting is 130~150L/min, soil cement 28d
Intensity is more than 0.8MPa.Cement mixing pile rig subsidence velocity is to be less than 0.8m/m in less than 1.2m/m in, lifting speed, stir
Mix rotating speed is 30~50rad/m in.Rig is cut when soil sinks and opens grouting pump, air compressor machine, and cement mortar and compressed air are poured into
In soil.
After drilling pipe sinks down into design altitude, suitably continue mixing-filling in stake bottom point, then press and be less than 0.8m/m in
Speed whitewashing lifting drilling pipe, whitewash while stirring, to design height of pile top.Mark is carried out on drilling rod, controls the long error of stake
Less than 10cm.The iron ring that a radius is 5cm is welded on pile frame, measurement iron hammer is hung at high 5m, is straightened and bored using theodolite
Bar perpendicularity, make measurement iron hammer just by iron ring center.Drilling rod must be suitably adjusted before construction every time, is located at measurement iron hammer
In iron ring, i.e., the control of the drilling rod error of perpendicularity in 0.5%.To prevent mixing pile from broken pile occur, must be carried out continuously for slurry.
Stop to starch for some reason in construction, after recovering for slurry, drilling rod should be lifted after the 30s that whitewashes again by stake driver drilling rod sinking 0.5m.Whitewash bottom
Stake end 20cm, and a bottom 30s that whitewashes should be exceeded, make slurries that an end be fully achieved.
(2) sidewall of basement template is installed, indwelling sidewall of basement internal cavity during sidewall of basement formwork erection, in cutting shoe
Position pre-buried steel sludge out pipe, colligation sidewall of basement reinforcing bar, then pours sidewall of basement concrete；
(3) sunk after sidewall of basement concrete reaches design strength 100%, sidewall of basement is used under merogenesis
Heavy, often section sinks apart from being 150cm, and rig is stretched into 150cm below sidewall of basement internal cavity bottom, stirred by rotary drill bit
Loosened the soil body, and injected clear water simultaneously, and is monitored in real time at the top of sidewall of basement, and rig is adjusted according to real-time monitoring result
Drill speed, adjusts slow drill speed when authorities' portion's subsidence velocity is too fast, the control of sidewall of basement subsidence velocity 4mm/min with
It is interior；When sidewall of basement subsidence velocity is more than 4mm/min into, clear water is changed to the friction of mud increase sidewall of basement sinking
Power, mud balance are 1.25~1.35g/cm3；Sidewall of basement subsidence velocity is still more than 4mm/ after if clear water changes mud into
During min, it will often save sinking distance and be reduced to 100~140cm；
(4) after being flattened at the top of cement mixing pile, rubber sheet gasket is laid at the top of cement mixing pile；
(5) the brick fetal membrane of basement bottom board is installed, installs the template of basement reversed beam, colligation basement bottom board or basement
The reinforcing bar of reversed beam, pour basement bottom board or basement reversed beam；
(6) sidewall of basement internal cavity is closed；The steel reinforcement cage of colligation completion is first put into sidewall of basement internal cavity, then
Poured with C30 expansive concretes, accelerated cement slurry, accelerated cement slurry note are first injected before C30 expansive concretes pour
The hole at cutting shoe position can be blocked after entering；
(7) one layer concrete floor of construction；
Closing sidewall of basement internal cavity and a layer concrete floor slab construction can be applied with basement bottom board concrete synchronous
Work is to accelerate progress.
Basement bottom board bottom is weak soil soil property, and when foundation soil strength is less than 2MPa, construction procedure is：
(1) construction minor diameter prefabricated pile；
When running into hard interbedded layer, if directly pressing minor diameter prefabricated pile, the destruction of minor diameter precast pile head is likely to result in,
Pushed in advance using steel pipe, diameter of steel tube is smaller by 1/4~1/3 than minor diameter prefabricated pile diameter, and coarse-pitch thread steel is welded outside steel pipe
Muscle, the coarse thread steel bar that the fixture in minor diameter prefabricated pile equipment is clamped outside steel pipe is pushed, then extracts steel pipe, will
The soil cleaning of steel pipe inner product, if hard interbedded layer is very hard, can twitch steel pipe repeatedly, progressively hard interbedded layer is fluffed, and be then pressed into small straight
Footpath prefabricated pile；
(2) sidewall of basement template is installed, indwelling sidewall of basement internal cavity during sidewall of basement formwork erection, in cutting shoe
Position pre-buried steel sludge out pipe, colligation sidewall of basement reinforcing bar, then pours sidewall of basement concrete；
(3) sunk after sidewall of basement concrete reaches design strength 100%, sidewall of basement is used under merogenesis
Heavy, often section sinks apart from being 150cm, and rig is stretched into 150cm below sidewall of basement internal cavity bottom, stirred by rotary drill bit
Loosened the soil body, and injected clear water simultaneously, and is monitored in real time at the top of sidewall of basement, and rig is adjusted according to real-time monitoring result
Drill speed, adjusts slow drill speed when authorities' portion's subsidence velocity is too fast, the control of sidewall of basement subsidence velocity 4mm/min with
It is interior；When sidewall of basement subsidence velocity is more than 4mm/min into, clear water is changed to the friction of mud increase sidewall of basement sinking
Power, mud balance are 1.25~1.35g/cm3；Sidewall of basement subsidence velocity is still more than 4mm/ after if clear water changes mud into
During min, it will often save sinking distance and be reduced to 100~140cm；
(4) the brick fetal membrane of basement bottom board is installed, installs the template of basement reversed beam, colligation basement bottom board or basement
The reinforcing bar of reversed beam, pour basement bottom board or basement reversed beam；
(5) sidewall of basement internal cavity is closed；The steel reinforcement cage of colligation completion is first put into sidewall of basement internal cavity, then
Poured with C30 expansive concretes, accelerated cement slurry, accelerated cement slurry note are first injected before C30 expansive concretes pour
The hole at cutting shoe position can be blocked after entering；
(6) one layer concrete floor of construction；
Closing sidewall of basement internal cavity and a layer concrete floor slab construction can be applied with basement bottom board concrete synchronous
Work is to accelerate progress.
The present invention has a safety feature, low cost, short time limit.
Brief description of the drawings
Fig. 1 is sunk type basement floor map one, and Fig. 2 is sunk type basement floor map two, and Fig. 3 is sinking
Formula basement floor map three, Fig. 4 are sunk type basement elevational schematic view one, and Fig. 5 illustrates for sunk type basement facade
Figure two, Fig. 6 are sunk type basement elevational schematic view three.
1st, basement reversed beam, 2, sidewall of basement, 3, sidewall of basement internal cavity, 4, minor diameter prefabricated pile, 5, basement
Bottom plate, 6, cutting shoe, 7, one layer concrete floor, 8, rubber sheet gasket, 9, cement mixing pile.
Embodiment
The present embodiment is described in detail below in conjunction with accompanying drawing.
Embodiment one
The width of sidewall of basement 2 is 420mm in the present embodiment, and the bottom of sidewall of basement 2 sets cutting shoe 6, and the gradient of cutting shoe 6 is
55 degree, sidewall of basement 2 sets internal cavity, and the width of sidewall of basement internal cavity 3 is 130mm.
The bottom absolute altitude of basement bottom board 5 is identical with the top mark height of sidewall of basement cutting shoe 6.The ground below basement bottom board 5
When native intensity is more than or equal to 8MPa, basement bottom board 5 is only set.
The bottom of basement bottom board 5 is pan soil soil property, i.e., when foundation soil strength is more than or equal to 8MPa, construction procedure is：
(1) template of sidewall of basement 2 is installed, indwelling sidewall of basement internal cavity 3 during 2 formwork erection of sidewall of basement,
The position pre-buried steel sludge out pipe of cutting shoe 6, the reinforcing bar of colligation sidewall of basement 2, then pours the concrete of sidewall of basement 2；
(2) sunk after the concrete of sidewall of basement 2 reaches design strength 100%, sidewall of basement 2 uses merogenesis
Sink, often section sinks apart from being 150cm, and rig is stretched into 150cm below the bottom of sidewall of basement internal cavity 3, is bored by rotating
Head stirs the body that loosens the soil, and injected clear water simultaneously, and is monitored in real time at the top of sidewall of basement 2, is adjusted according to real-time monitoring result
Whole drill bit of drilling machine rotating speed, adjusts slow drill speed when authorities' portion's subsidence velocity is too fast, the subsidence velocity of sidewall of basement 2 is controlled in 4mm/
Within min；When the subsidence velocity of sidewall of basement 2 is more than 4mm/min, clear water is changed under mud increase sidewall of basement 2
Heavy frictional force, mud balance are 1.25~1.35g/cm3；If clear water change into after mud the subsidence velocity of sidewall of basement 2 according to
When so more than 4mm/min, it will often save sinking distance and be reduced to 100~140cm；
(3) the brick fetal membrane of basement bottom board 5 is installed, the reinforcing bar of colligation basement bottom board 5, pours basement bottom board 5；
(4) sidewall of basement internal cavity 3 is closed；The steel reinforcement cage of colligation completion is first put into sidewall of basement internal cavity 3, so
Poured afterwards with C30 expansive concretes, accelerated cement slurry, accelerated cement slurry are first injected before C30 expansive concretes pour
The hole at the position of cutting shoe 6 can be blocked after injection；
(5) one layer concrete floor 7 of construction；
Close sidewall of basement internal cavity 3 and a layer concrete floor 7 construction can be with the concrete synchronous of basement bottom board 5
Construct to accelerate progress.
Embodiment two
The width of sidewall of basement 2 is 420mm in the present embodiment, and the bottom of sidewall of basement 2 sets cutting shoe 6, and the gradient of cutting shoe 6 is
55 degree, sidewall of basement 2 sets internal cavity, and the width of sidewall of basement internal cavity 3 is 130mm.
The bottom absolute altitude of basement bottom board 5 is identical with the top mark height of sidewall of basement cutting shoe 6.The ground below basement bottom board 5
Native intensity is less than 8MPa and when being more than or equal to 2MPa, setting basement bottom board 5 and basement reversed beam 1, between adjacent basement reversed beam 1
Away from being 300mm for 1.3m, the width of basement reversed beam 1, the height of basement reversed beam 1 is 300mm, longitudinal basement reversed beam 1 and transverse direction
Basement reversed beam 1 forms well shape, and basement reversed beam 1 is disposed below cement mixing pile 9, cement mixing pile 9 and basement reversed beam 1 it
Between rubber spacer is set, rubber spacer thickness is 15mm, and the purpose of setting rubber spacer is to reduce the top of cement mixing pile 9 just
Degree, be advantageous to cement mixing pile 9 and the common load of soil；
The bottom of basement bottom board 5 is weak soil soil property, i.e., when foundation soil strength is less than 8MPa and is more than or equal to 2MPa, construction step
Suddenly it is：
(1) construction cement mixing pile 9；
Technical parameter is from as follows：Grouting pressure is less than 1.0MPa, and flow rate of grouting is 130~150L/min, soil cement 28d
Intensity is more than 0.8MPa.The rig subsidence velocity of cement mixing pile 9 is to be less than 0.8m/min less than 1.2m/m in, lifting speed, stir
Mix rotating speed is 30~50rad/min.Rig is cut when soil sinks and opens grouting pump, air compressor machine, and cement mortar and compressed air are poured into
In soil.
After drilling pipe sinks down into design altitude, suitably continue mixing-filling in stake bottom point, then press and be less than 0.8m/min
Speed whitewashing lifting drilling pipe, whitewash while stirring, to design height of pile top.Mark is carried out on drilling rod, controls the long error of stake
Less than 10cm.The iron ring that a radius is 5cm is welded on pile frame, measurement iron hammer is hung at high 5m, is straightened and bored using theodolite
Bar perpendicularity, make measurement iron hammer just by iron ring center.Drilling rod must be suitably adjusted before construction every time, is located at measurement iron hammer
In iron ring, i.e., the control of the drilling rod error of perpendicularity in 0.5%.To prevent mixing pile from broken pile occur, must be carried out continuously for slurry.
Stop to starch for some reason in construction, after recovering for slurry, drilling rod should be lifted after the 30s that whitewashes again by stake driver drilling rod sinking 0.5m.Whitewash bottom
Stake end 20cm, and a bottom 30s that whitewashes should be exceeded, make slurries that an end be fully achieved.
(2) template of sidewall of basement 2 is installed, indwelling sidewall of basement internal cavity 3 during 2 formwork erection of sidewall of basement,
The position pre-buried steel sludge out pipe of cutting shoe 6, the reinforcing bar of colligation sidewall of basement 2, then pours the concrete of sidewall of basement 2；
(3) sunk after the concrete of sidewall of basement 2 reaches design strength 100%, sidewall of basement 2 uses merogenesis
Sink, often section sinks apart from being 150cm, and rig is stretched into 150cm below the bottom of sidewall of basement internal cavity 3, is bored by rotating
Head stirs the body that loosens the soil, and injected clear water simultaneously, and is monitored in real time at the top of sidewall of basement, is adjusted according to real-time monitoring result
Drill bit of drilling machine rotating speed, adjusts slow drill speed when authorities' portion's subsidence velocity is too fast, sidewall of basement subsidence velocity is controlled in 4mm/min
Within；When the subsidence velocity of sidewall of basement 2 is more than 4mm/min, clear water is changed into mud increase sidewall of basement 2 sinks
Frictional force, mud balance are 1.25~1.35g/cm3；The subsidence velocity of sidewall of basement 2 still surpasses after if clear water changes mud into
When crossing 4mm/min, it will often save sinking distance and be reduced to 100~140cm；
(4) after the top of cement mixing pile 9 is flattened, in the top of cement mixing pile 9 laying rubber sheet gasket 8；
(5) the brick fetal membrane of basement bottom board 5 is installed, installs the template of basement reversed beam 1, colligation basement bottom board 5 or ground
The reinforcing bar of lower room reversed beam 1, pour basement bottom board 5 or basement reversed beam 1；
(6) sidewall of basement internal cavity 3 is closed；The steel reinforcement cage of colligation completion is first put into sidewall of basement internal cavity 3, so
Poured afterwards with C30 expansive concretes, accelerated cement slurry, accelerated cement slurry are first injected before C30 expansive concretes pour
The hole at the position of cutting shoe 6 can be blocked after injection；
(7) one layer concrete floor 7 of construction；
Close sidewall of basement internal cavity 3 and a layer concrete floor 7 construction can be with the concrete synchronous of basement bottom board 5
Construct to accelerate progress.
Embodiment three
The width of sidewall of basement 2 is 420mm in the present embodiment, and the bottom of sidewall of basement 2 sets cutting shoe 6, and the gradient of cutting shoe 6 is
55 degree, sidewall of basement 2 sets internal cavity, and the width of sidewall of basement internal cavity 3 is 130mm.
The bottom absolute altitude of basement bottom board 5 is identical with the top mark height of sidewall of basement cutting shoe 6.The ground below basement bottom board 5
When native intensity is less than 2MPa, it is 1.4~1.7m to set basement bottom board 5 and basement reversed beam 1, the adjacent spacing of basement reversed beam 1,
The width of basement reversed beam 1 is 300mm, and the height of basement reversed beam 1 is 350mm, longitudinal basement reversed beam 1 and horizontal basement reversed beam
1 forms well shape, and minor diameter prefabricated pile 4 is disposed below in longitudinal basement reversed beam 1 and the horizontal crossover location of basement reversed beam 1, small straight
4 a diameter of 250mm of footpath prefabricated pile；
The bottom of basement bottom board 5 is weak soil soil property, i.e., when foundation soil strength is less than 2MPa, construction procedure is：
(1) construction minor diameter prefabricated pile 4；
When running into hard interbedded layer, if directly pressing minor diameter prefabricated pile 4, it is likely to result in the pile crown of minor diameter prefabricated pile 4 and breaks
It is bad, pushed in advance using steel pipe, diameter of steel tube is smaller by 1/4~1/3 than the diameter of minor diameter prefabricated pile 4, and thick spiral shell is welded outside steel pipe
Line reinforcing bar, the coarse thread steel bar that the fixture in the equipment of minor diameter prefabricated pile 4 is clamped outside steel pipe is pushed, then extracts steel
Pipe, steel pipe inner product soil is cleared up, if hard interbedded layer is very hard, steel pipe can be twitched repeatedly, progressively hard interbedded layer is fluffed, be then pressed into
Minor diameter prefabricated pile 4；
(2) template of sidewall of basement 2 is installed, indwelling sidewall of basement internal cavity 3 during 2 formwork erection of sidewall of basement,
The position pre-buried steel sludge out pipe of cutting shoe 6, the reinforcing bar of colligation sidewall of basement 2, then pours the concrete of sidewall of basement 2；
(3) sunk after the concrete of sidewall of basement 2 reaches design strength 100%, sidewall of basement 2 uses merogenesis
Sink, often section sinks apart from being 150cm, and rig is stretched into 150cm below the bottom of sidewall of basement internal cavity 3, is bored by rotating
Head stirs the body that loosens the soil, and injected clear water simultaneously, and is monitored in real time at the top of sidewall of basement 2, is adjusted according to real-time monitoring result
Whole drill bit of drilling machine rotating speed, adjusts slow drill speed when authorities' portion's subsidence velocity is too fast, the subsidence velocity of sidewall of basement 2 is controlled in 4mm/
Within min；When the subsidence velocity of sidewall of basement 2 is more than 4mm/min, clear water is changed under mud increase sidewall of basement 2
Heavy frictional force, mud balance are 1.25~1.35g/cm3；If clear water change into after mud the subsidence velocity of sidewall of basement 2 according to
When so more than 4mm/min, it will often save sinking distance and be reduced to 100~140cm；
(4) the brick fetal membrane of basement bottom board 5 is installed, installs the template of basement reversed beam 1, colligation basement bottom board 5 or ground
The reinforcing bar of lower room reversed beam 1, pour basement bottom board 5 or basement reversed beam 1；
(5) sidewall of basement internal cavity 3 is closed；The steel reinforcement cage of colligation completion is first put into sidewall of basement internal cavity 3, so
Poured afterwards with C30 expansive concretes, accelerated cement slurry, accelerated cement slurry are first injected before C30 expansive concretes pour
The hole at the position of cutting shoe 6 can be blocked after injection；
(6) one layer concrete floor 7 of construction；
Close sidewall of basement internal cavity 3 and a layer concrete floor 7 construction can be with the concrete synchronous of basement bottom board 5
Construct to accelerate progress.
Claims (2)
1. a kind of sunk type basement construction, it is characterized in that sidewall of basement width is 400~450mm, sidewall of basement bottom
Cutting shoe is set, cutting shoe gradient is 50~60 degree, and sidewall of basement sets internal cavity, sidewall of basement internal cavity width for 120~
150mm。
Basement bottom board bottom absolute altitude is identical with the top mark height of sidewall of basement cutting shoe；Foundation soil strength is big below basement bottom board
When equal to 8MPa, basement bottom board is only set；Foundation soil strength is less than 8MPa and is more than or equal to below basement bottom board
During 2MPa, basement bottom board and basement reversed beam are set, and adjacent basement reversed beam spacing is 1.2~1.5m, and basement reversed beam is wide
It is highly 250~300mm to spend for 300mm, basement reversed beam, and longitudinal basement reversed beam and horizontal basement reversed beam form well shape,
Cement mixing pile is disposed below in basement reversed beam, and rubber spacer, rubber spacer are set between cement mixing pile and basement reversed beam
Thickness is 10~15mm；When foundation soil strength is less than 2MPa below basement bottom board, set basement bottom board and basement anti-
Beam, adjacent basement reversed beam spacing are 1.4~1.7m, and basement reversed beam width is 300mm, basement reversed beam highly for 300~
400mm, longitudinal basement reversed beam and horizontal basement reversed beam form well shape, and longitudinal basement reversed beam and horizontal basement reversed beam are handed over
Vent, which is put, is disposed below minor diameter prefabricated pile, a diameter of 200~250mm of minor diameter prefabricated pile.
2. sunk type basement construction according to claim 1, it is characterized in that basement bottom board bottom is weak soil soil property, i.e.,
When foundation soil strength is less than 2MPa, construction procedure is：
(1) construction minor diameter prefabricated pile；
When running into hard interbedded layer, if directly pressing minor diameter prefabricated pile, the destruction of minor diameter precast pile head is likely to result in, is used
Steel pipe pushes in advance, and diameter of steel tube is smaller by 1/4~1/3 than minor diameter prefabricated pile diameter, and coarse thread steel bar is welded outside steel pipe, is made
The coarse thread steel bar that fixture in minor diameter prefabricated pile equipment is clamped outside steel pipe is pushed, and then extracts steel pipe, by steel pipe
Inner product soil cleaning, if hard interbedded layer is very hard, can twitch steel pipe repeatedly, progressively hard interbedded layer is fluffed, it is pre- to be then pressed into minor diameter
Stake processed；
(2) sidewall of basement template is installed, indwelling sidewall of basement internal cavity during sidewall of basement formwork erection, at cutting shoe position
Pre-buried steel sludge out pipe, colligation sidewall of basement reinforcing bar, then pours sidewall of basement concrete；
(3) being sunk after sidewall of basement concrete reaches design strength 100%, sidewall of basement is sunk using merogenesis,
Often section sinks apart from being 150cm, and rig is stretched into 150cm below sidewall of basement internal cavity bottom, pine is stirred by rotary drill bit
The soil body, and injected clear water simultaneously, and monitored in real time at the top of sidewall of basement, adjusting rig according to real-time monitoring result bores
Head rotating speed, adjusts slow drill speed when authorities' portion's subsidence velocity is too fast, sidewall of basement subsidence velocity is controlled within 4mm/min；
When sidewall of basement subsidence velocity is more than 4mm/min into, clear water is changed to the frictional force of mud increase sidewall of basement sinking,
Mud balance is 1.25~1.35g/cm3；Sidewall of basement subsidence velocity is still more than 4mm/min after if clear water changes mud into
When, it will often save sinking distance and be reduced to 100~140cm；
(4) the brick fetal membrane of basement bottom board is installed, installs the template of basement reversed beam, colligation basement bottom board or basement reversed beam
Reinforcing bar, pour basement bottom board or basement reversed beam；
(5) sidewall of basement internal cavity is closed；The steel reinforcement cage of colligation completion, Ran Houyong are first put into sidewall of basement internal cavity
C30 expansive concretes are poured, and accelerated cement slurry, accelerated cement slurry injection are first injected before C30 expansive concretes pour
The hole at cutting shoe position can be blocked afterwards；
(6) one layer concrete floor of construction；
Close sidewall of basement internal cavity and a layer concrete floor slab construction and can be constructed with basement bottom board concrete synchronous with
Quickening progress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711312464.6A CN107816059A (en) | 2017-12-12 | 2017-12-12 | Sunk type basement constructs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711312464.6A CN107816059A (en) | 2017-12-12 | 2017-12-12 | Sunk type basement constructs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107816059A true CN107816059A (en) | 2018-03-20 |
Family
ID=61606001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711312464.6A Withdrawn CN107816059A (en) | 2017-12-12 | 2017-12-12 | Sunk type basement constructs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107816059A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112695788A (en) * | 2020-12-26 | 2021-04-23 | 中冶天工集团有限公司 | Ground base layer processing method |
| CN112878462A (en) * | 2021-01-13 | 2021-06-01 | 广州市第三市政工程有限公司 | Construction method of circular inspection well template |
-
2017
- 2017-12-12 CN CN201711312464.6A patent/CN107816059A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112695788A (en) * | 2020-12-26 | 2021-04-23 | 中冶天工集团有限公司 | Ground base layer processing method |
| CN112878462A (en) * | 2021-01-13 | 2021-06-01 | 广州市第三市政工程有限公司 | Construction method of circular inspection well template |
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Application publication date: 20180320 |