CN107700495B - The construction method of deep basal pit under complex working condition - Google Patents
The construction method of deep basal pit under complex working condition Download PDFInfo
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- CN107700495B CN107700495B CN201710914206.9A CN201710914206A CN107700495B CN 107700495 B CN107700495 B CN 107700495B CN 201710914206 A CN201710914206 A CN 201710914206A CN 107700495 B CN107700495 B CN 107700495B
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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
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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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Abstract
Construction method the present invention relates to deep basal pit under complex working condition includes S1: the absolute altitude of earth excavation to underground first layer, the building enclosure of construction deep basal pit, first layer horizontal structure is affixed by first layer horizontal structure and building enclosure under construction ground, underground the first soil outlet S2 is opened up on the first layer horizontal structure of underground: excavating two layers cubic metre of earth downwards, the bottom of this layer construct this layer horizontal structure the horizontal structure of this layer and building enclosure is affixed, the soil outlet S3 for setting this layer corresponded to is stayed on the horizontal structure of this layer: this layer of upper one layer of horizontal structure of constructing, and it is stayed on this layer of upper one layer of horizontal structure and sets this layer of upper one layer of soil outlet, this layer of upper one layer of soil outlet is correspondingly arranged with the first soil outlet of underground；S4: repeating S2 and S3, carried out by the soil outlet opened up on each layer horizontal structure unearthed, and each layer soil outlet size sequentially increases from the top down, is excavated to deep basal pit bottom designed elevation construction bottom plate S5: successively closing the soil outlet of each layer from bottom to top.
Description
Technical field
The present invention relates to the realm of building construction, the construction method of deep basal pit under espespecially a kind of complex working condition.
Background technique
Under the realm of building construction, complex working condition during the biggish deep basal pit of construction area, the earthwork that needs to excavate
More, the amount of being unearthed can be very big, in the prior art, usually because being unearthed construction that is slow and influencing structure.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, a kind of construction party of deep basal pit under complex working condition is provided
Method solves the problems of the prior art.
Realizing the technical solution of above-mentioned purpose is:
The present invention provides a kind of construction method of deep basal pit under complex working condition, includes the following steps:
S1: the absolute altitude of earth excavation to underground first layer, the building enclosure for deep basal pit of constructing, first layer is horizontal under construction ground
Structure, and the first layer horizontal structure and the building enclosure is affixed, it is opened up on the underground first layer horizontal structure
The first soil outlet of underground；
S2: excavating downwards two layers cubic metre of earth, is unearthed using first soil outlet of underground, constructs this layer in the bottom of this layer
Horizontal structure, and the horizontal structure of this layer and the building enclosure is affixed, it is stayed on the horizontal structure of this layer and sets going out for this layer
Tu Kou, the soil outlet of this layer are correspondingly arranged with first soil outlet of underground；
S3: this layer of upper one layer of horizontal structure of constructing, and stayed on this layer of upper one layer of horizontal structure and set this layer upper one layer
Soil outlet, this layer of upper one layer of soil outlet be correspondingly arranged with first soil outlet of underground；
S4: repeating step S2 and S3, and the soil outlet by opening up on each layer horizontal structure carry out it is unearthed, from the top down respectively
The size of the soil outlet of layer sequentially increases, and the designed elevation until being excavated to deep basal pit bottom is applied in the portion at the deep basal pit bottom
Work bottom plate；And
S5: the soil outlet of each layer is successively closed from bottom to top.
Under complex working condition of the present invention the construction method of deep basal pit the utility model has the advantages that
The present invention is by construction building enclosure and the underground first layer horizontal structure affixed with the building enclosure, thus right
Deep basal pit is supported, and is not required to remove, and can reduce the waste of temporary support.
It is excavated downwards two layers, is unearthed using the first soil outlet of underground, while this layer of horizontal junction of constructing every time using contrary sequence method
Structure stays and sets this layer of soil outlet；Upwards along one layer of horizontal structure is made, upper one layer of horizontal structure of constructing stays and sets this layer of soil outlet；From
The soil outlet of upper each layer downwards is correspondingly arranged with the first soil outlet of underground, and the size of the soil outlet of each layer is sequentially from the top down
Increase, in this way, the soil outlet of each layer is up and down, form unified soil outlet, when the amount of being unearthed is very big, just first mound is being gone out
The position of Tu Kou carries out the construction of structure to other positions, greatly improves unearthed speed, reduces the earthwork transportation time, applies
Work is high-efficient, mends workload after reducing the later period, solves the problems, such as to influence the construction of structure because being unearthed slowly in the prior art.Together
When deep basal pit can be supported using the horizontal structure of each layer.
It constructs when excavating to designed elevation bottom plate, successively closes each layer soil outlet from bottom to top using along the practice, reduction
Duration.In this way in such a way that contrary sequence method and the suitable practice combine, both solved the periphery operating condition of deep basal pit and its asking for complexity
Topic does not need to remove temporary support, while improving construction efficiency, reduces the duration.
Under complex working condition of the present invention the construction method of deep basal pit further improvement lies in that, before step S5 further include:
It constructs on the underground first layer horizontal structure superstructure, the superstructure includes that ground first layer is horizontal
Structure forms the work surface for closing the soil outlet of each layer by the ground first layer horizontal structure, and in the ground first
Transport mouth on the ground is opened up on layer horizontal structure.
Under complex working condition of the present invention the construction method of deep basal pit further improvement lies in that, further includes:
At the edge of first soil outlet of underground, supporting beam is set.
Under complex working condition of the present invention the construction method of deep basal pit further improvement lies in that, further includes:
The supporting beam is removed before closing first soil outlet of underground.
Under complex working condition of the present invention the construction method of deep basal pit further improvement lies in that, the building enclosure for deep basal pit of constructing
Further include:
In the periphery of deep basal pit construction diaphram wall；
The interval construction pile foundation in deep basal pit；
Construction stiffened column, the stiffened column is inserted in the corresponding pile foundation.
Under complex working condition of the present invention the construction method of deep basal pit further improvement lies in that, further includes: the water for each layer of constructing
When flat structure, by the horizontal structure of each layer and the stiffened column anchor connection.
Detailed description of the invention
Fig. 1 to Figure 11 is the step schematic diagram of the construction method of deep basal pit under complex working condition of the present invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
Refering to fig. 1 to Figure 11, it is shown that the step schematic diagram of the construction method of deep basal pit under complex working condition of the present invention.In conjunction with
Shown in Fig. 1 to Figure 11, the construction method of deep basal pit, includes the following steps: under complex working condition of the present invention
S1: the absolute altitude of earth excavation to underground first layer, the building enclosure for deep basal pit of constructing, first layer is horizontal under construction ground
Structure, and first layer horizontal structure and building enclosure is affixed, underground first is opened up on the first layer horizontal structure of underground is unearthed
Mouthful；
S2: excavating downwards two layers cubic metre of earth, is unearthed using the first soil outlet of underground, constructs the level of this layer in the bottom of this layer
Structure, and the horizontal structure of this layer and building enclosure is affixed, the soil outlet for setting this layer is stayed on the horizontal structure of this layer, the layer
Soil outlet be correspondingly arranged with the first soil outlet of underground；
S3: this layer of upper one layer of horizontal structure of constructing, and stayed on this layer of upper one layer of horizontal structure and set this layer upper one layer
Soil outlet, this layer of upper one layer of soil outlet be correspondingly arranged with the first soil outlet of underground；
S4: repeating step S2 and S3, and the soil outlet by opening up on each layer horizontal structure carry out it is unearthed, from the top down respectively
The size of the soil outlet of layer sequentially increases, the designed elevation until being excavated to deep basal pit bottom, at the portion construction bottom at deep basal pit bottom
Plate；And
S5: the soil outlet of each layer is successively closed from bottom to top.
So from the top down each layer soil outlet and the first soil outlet of underground is correspondingly arranged, and from the top down each layer out
The size of Tu Kou sequentially increases, in this way, the soil outlet of each layer is up and down, forms unified soil outlet, when the amount of being unearthed is very big,
The construction of structure is carried out in the position of soil outlet mound to other positions with regard to elder generation, unearthed speed is greatly improved, reduces soil
Square haulage time, construction efficiency is high, mends workload after reducing the later period, and solving influences structure because being unearthed slowly in the prior art
The problem of construction.Deep basal pit can be supported using the horizontal structure of each layer simultaneously.
As a better embodiment of the construction method of deep basal pit under complex working condition of the present invention, as shown in Figure 1, construction is deep
The building enclosure of foundation pit further include: in the periphery of deep basal pit construction diaphram wall 11, set to be enclosed using diaphram wall 11
The construction area of deep basal pit is formed, during deep pit digging, diaphram wall 11 can bear very big soil pressure, to depth
Foundation pit is played a supporting role.
The interval construction pile foundation 12 in deep basal pit；Construction stiffened column 13, stiffened column 13 is inserted in corresponding pile foundation 12.
Construct each layer horizontal structure when, by 13 anchor connection of the horizontal structure of each layer and stiffened column.In the present embodiment, first in deep base
Stiffened column 13, is then inserted to downwards in pile foundation 12 by the bottom construction pile foundation 12 in hole from the top of pile foundation 12, and mutually coincide the left side 3m
It is right.Stiffened column 13 is used to be anchored with the horizontal structure of later period each layer, to play the role of supporting deep basal pit.
As a better embodiment of the construction method of deep basal pit under complex working condition of the present invention, as shown in Figure 1, constructing
Before building enclosure 10, the absolute altitude of first earth excavation to underground first layer B1, thus during constructing building enclosure 10, just
The construction such as hole drill can be carried out downwards directly at the first layer B1 of underground, to reduce the length of corresponding hole drill, improved
Construction efficiency reduces construction time and expense, reduces energy loss.
As a better embodiment of the construction method of deep basal pit under complex working condition of the present invention, successively sealed from bottom to top
It further include superstructure of constructing on underground first layer horizontal structure 21 before closing the soil outlet of each layer, superstructure includes on the ground
First layer horizontal structure 31 forms the work surface of the soil outlet for closing each layer by ground first layer horizontal structure, and on ground
Transport mouth 310 on the ground is opened up on upper first layer horizontal structure 31.In the present embodiment, the size of transport mouth 310 is slightly larger than on the ground
The size of the first soil outlet of underground 210.
It further include in underground first as a better embodiment of the construction method of deep basal pit under complex working condition of the present invention
Supporting beam 211 is arranged in the edge of soil outlet 210.Reinforce using edge of the supporting beam 211 to the first soil outlet of underground 210 and apply
Work enhances the stability of structure to prevent the edge of the first soil outlet of underground 210 from collapsing problem occur, ensure that construction
Safety.
As a better embodiment of the construction method of deep basal pit under complex working condition of the present invention, go out closely lower first
Supporting beam 211 is removed before native mouth 210, closure construction then is carried out to the first soil outlet of underground 210.
Below with reference to Fig. 1 to Figure 11 under complex working condition of the invention the step of the construction method of deep basal pit make specifically
It is bright:
As shown in Figure 1, at first earth excavation to the absolute altitude of underground first layer B1, then under the periphery construction ground of deep basal pit
Diaphragm wall 11 sets the construction area to form deep basal pit to enclose using diaphram wall 11, the interval construction pile foundation in deep basal pit
12；Construction stiffened column 13, stiffened column 13 is inserted in corresponding pile foundation 12.In the present embodiment, first in the bottom of deep basal pit
Stiffened column 13, is then inserted to downwards in pile foundation 12, mutually coincide 3m or so by construction pile foundation 12 from the top of pile foundation 12.First excavate
Cubic metre of earth the time and expense of the hole drills length such as subsequent pile foundation, stiffened column, energy loss can be reduced to underground first layer B1.
As shown in Fig. 2, in underground, the bottom construction of first layer B1 and building enclosure 10 are solid after building enclosure 10 of constructing
The underground first layer horizontal structure 21 connect.Specifically using first layer horizontal structure 21 under stripping closing mode construction ground, protecting
Under the premise of demonstrate,proving the transmitting of deep basal pit internal force level, the first soil outlet of underground 210 is opened up on underground first layer horizontal structure 21.In
Supporting beam 211 is arranged in the edge of the first soil outlet of underground 210, carries out reinforcement effect with the edge to the first soil outlet of underground 210,
Prevent the first soil outlet of underground 210 edge occur collapse and there are security risks.
As shown in figure 3, after the construction of underground first layer horizontal structure 21 is completed, being excavated downwards using reverse construction
At the two layers cubic metre of earth of absolute altitude to underground third layer B3, the earthwork is had bad luck to 210 bottom of the first soil outlet of underground, and using grab bucket
Machine is vertically hoisted at the first soil outlet of underground 210 upwards and transports.
The third layer horizontal structure 23 under the bottom construction ground of underground third layer B3, and by underground third layer horizontal structure 23
Carry out anchor connection with stiffened column 13, form stable support system, to reinforce supporting role to deep basal pit, to deep basal pit into
Row support, is not required to remove, can reduce the waste of temporary support.Correspond to underground first on underground third layer horizontal structure 23
The reserved earthwork for forming underground third soil outlet 230, being excavated for handling of soil outlet 210.Underground third layer horizontal structure 23 with
The first soil outlet of underground 210 is correspondingly arranged.
As shown in figure 4, suitable on underground third layer horizontal structure 23 set up frame body construction subbasement horizontal structure
22, it is reserved on subbasement horizontal structure 22 corresponding to the first soil outlet of underground 210 and forms the second soil outlet of underground 220,
The second soil outlet of underground 220 is correspondingly arranged with the first soil outlet of underground 210.The second soil outlet of underground 220 and underground third are unearthed
The size of mouth 230 is identical, is all larger than the first soil outlet of underground 210.In the present embodiment, according to 1:2 at middle part soil outlet position
Gradient slope excavate.
And so on, stripping excavates two layers cubic metre of earth downwards every time, earthwork handling is gone out upwards from the soil outlet on upper layer, together
When construct this layer of horizontal structure, the soil outlet for setting this layer is stayed on this layer.Then upwards along one layer of horizontal structure of work, construction upper one
The horizontal structure of layer, stays the soil outlet for setting this layer, and carry out slope excavation.
As shown in figure 5, in the present embodiment, two layers is excavated downwards to underground layer 5 B5, the earthwork is had bad luck to underground the
At the bottom of one soil outlet 210, the second soil outlet of underground 220 and underground third soil outlet 230, and using grab claw upwardly through
The second soil outlet of underground 220 and underground third soil outlet 230 are vertically hoisted at the first soil outlet of underground 210 and transport.
The layer 5 horizontal structure 25 under the bottom construction ground of underground layer 5 B5, and by underground layer 5 horizontal structure 25
Carry out anchor connection with stiffened column 13, form stable support system, to reinforce supporting role to deep basal pit, to deep basal pit into
Row support, is not required to remove, can reduce the waste of temporary support.Correspond to underground third on underground layer 5 horizontal structure 25
The reserved earthwork for forming the 5th soil outlet 250 of underground, being excavated for handling of soil outlet 230.The 5th soil outlet 250 of underground and underground
First soil outlet 210 is correspondingly arranged.
As shown in fig. 6, suitable on underground layer 5 horizontal structure 25 set up the 4th layer of horizontal structure under frame body construction ground
24, it is reserved on the horizontal structure 24 of the 4th layer of underground corresponding to underground third soil outlet 230 and forms the 4th soil outlet 240 of underground,
The 4th soil outlet 240 of underground is identical with the size of the 5th soil outlet 250 of underground, is all larger than underground third soil outlet 230.Underground
Four soil outlets 240 and the first soil outlet of underground 210 are correspondingly arranged.In the present embodiment, according to 1:2's at middle part soil outlet position
Gradient slope is excavated.
As shown in fig. 7, excavate two layers downwards to underground layer 7 B7, by the earthwork have bad luck to the first soil outlet of underground 210,
The bottom of lower second soil outlet 220, underground third soil outlet 230, underground the 4th soil outlet 240 and the 5th soil outlet 250 of underground
Place, and be vertically hoisted at the first soil outlet of underground 210 and transported upwards using grab claw.
The layer 6 horizontal structure 26 under the bottom construction ground of underground layer 7 B7, and by underground layer 6 horizontal structure 26
Carry out anchor connection with stiffened column 13, form stable support system, to reinforce supporting role to deep basal pit, to deep basal pit into
Row support, is not required to remove, can reduce the waste of temporary support.Correspond to underground the 5th on underground layer 6 horizontal structure 26
Soil outlet 250 is reserved to form the 6th soil outlet 260 of underground, and the 6th soil outlet 260 of underground and the correspondence of the first soil outlet of underground 210 are set
It sets.The earthwork excavated for handling.At the bottom B8 designed elevation by earth excavation to deep basal pit.Due to king-tower position
Foundation pit usually wants dented, so in the present embodiment, the place that the bottom of deep basal pit corresponds to king-tower position is dented downwards, adds
Stiff stability.
As shown in figure 8, bottom plate 40 of constructing on bottom B8, since the foundation pit of king-tower position usually wants dented, so
In the present embodiment, the place on bottom plate 40 corresponding to king-tower position is dented downwards, reinforces stability.
As shown in figure 9, after bottom plate 40 is constructed, the first layer water on construction ground on underground first layer horizontal structure 21
Flat structure 31, forms the work surface of the soil outlet for closing each layer, and opens up on first layer horizontal structure 31 transport on the ground on the ground
Outlet 310.Because the design load of ground first layer horizontal structure 31 is mostly heavy load, the load of traffic route is conformed to
It asks.In the present embodiment, the size of transport mouth 310 and underground the first soil outlet 210 are identical on the ground.
As shown in Figure 10, closure construction is carried out to underground layer 6 horizontal structure 26 on bottom plate 40, forms underground the 6th
The 6th soil outlet 260 of underground is closed by connecting plate 261 using the 6th connecting plate 261 of underground.
As shown in figure 11, it successively constructs to form the connecting plate of each layer to the soil outlet of each layer from bottom to top, by going out for each layer
Tu Kou is closed.
The construction method of deep basal pit has the beneficial effect that under complex working condition of the present invention
The present invention is by construction building enclosure and the underground first layer horizontal structure affixed with building enclosure, thus to deep base
Hole is supported, and is not required to remove, and can reduce the waste of temporary support.
It is excavated downwards two layers, is unearthed using the first soil outlet of underground, while this layer of horizontal junction of constructing every time using contrary sequence method
Structure stays and sets this layer of soil outlet；Upwards along one layer of horizontal structure is made, upper one layer of horizontal structure of constructing stays and sets this layer of soil outlet；From
The soil outlet of upper each layer downwards is correspondingly arranged with the first soil outlet of underground, and the size of the soil outlet of each layer is sequentially from the top down
Increase, in this way, the soil outlet of each layer is up and down, form unified soil outlet, when the amount of being unearthed is very big, just first mound is being gone out
The position of Tu Kou carries out the construction of structure to other positions, greatly improves unearthed speed, reduces the earthwork transportation time, applies
Work is high-efficient, mends workload after reducing the later period, solves the problems, such as to influence the construction of structure because being unearthed slowly in the prior art.Together
When deep basal pit can be supported using the horizontal structure of each layer.
It constructs when excavating to designed elevation bottom plate, successively closes each layer soil outlet from bottom to top using along the practice, reduction
Duration.In this way in such a way that contrary sequence method and the suitable practice combine, both solved the periphery operating condition of deep basal pit and its asking for complexity
Topic does not need to remove temporary support, while improving construction efficiency, reduces the duration.
The present invention has been described in detail with reference to the accompanying drawings, those skilled in the art can be according to upper
It states and bright many variations example is made to the present invention.Thus, certain details in embodiment should not constitute limitation of the invention, this
Invention will be using the range that the appended claims define as protection scope of the present invention.
Claims (3)
1. the construction method of deep basal pit under a kind of complex working condition, which comprises the steps of:
S1: the absolute altitude of earth excavation to underground first layer, the building enclosure for deep basal pit of constructing, first layer horizontal junction under construction ground
Structure, and the first layer horizontal structure and the building enclosure is affixed, open up ground on the underground first layer horizontal structure
Lower first soil outlet；
S2: excavating downwards two layers cubic metre of earth, is unearthed using first soil outlet of underground, constructs the level of this layer in the bottom of this layer
Structure, and the horizontal structure of this layer and the building enclosure is affixed, the soil outlet for setting this layer is stayed on the horizontal structure of this layer,
The soil outlet of this layer is correspondingly arranged with first soil outlet of underground；
S3: this layer of upper one layer of horizontal structure of constructing, and stay on this layer of upper one layer of horizontal structure and to set this layer upper one layer and go out
Tu Kou, this layer of upper one layer of soil outlet are correspondingly arranged with first soil outlet of underground；
S4: repeating step S2 and S3, and the soil outlet by opening up on each layer horizontal structure carries out unearthed, each layer from the top down
The size of soil outlet sequentially increases, the designed elevation until being excavated to deep basal pit bottom, at the bottom of deep basal pit construction bottom
Plate；And
S5: the soil outlet of each layer is successively closed from bottom to top；
Before step S5 further include:
It constructs on the underground first layer horizontal structure superstructure, the superstructure includes ground first layer horizontal junction
Structure forms the work surface for closing the soil outlet of each layer by the ground first layer horizontal structure, and in the ground first layer
Transport mouth on the ground is opened up on horizontal structure；
At the edge of first soil outlet of underground, supporting beam is set；
The supporting beam is removed before closing first soil outlet of underground；
It is carried out by the soil outlet opened up on each layer horizontal structure unearthed, comprising: the earthwork is had bad luck to the bottom of corresponding soil outlet
At portion, and vertically it is hoisted at first soil outlet of underground and is transported upwards using grab claw；
The bottom of the deep basal pit correspond to king-tower position at it is dented downwards, on the bottom plate correspond to the king-tower position at
It is dented downwards.
2. the construction method of deep basal pit under complex working condition as described in claim 1, which is characterized in that deep basal pit of constructing is gone along with sb. to guard him
Structure further include:
In the periphery of deep basal pit construction diaphram wall；
The interval construction pile foundation in deep basal pit；
Construction stiffened column, the stiffened column is inserted in the corresponding pile foundation.
3. the construction method of deep basal pit under complex working condition as claimed in claim 2, which is characterized in that further include: each layer of constructing
Horizontal structure when, by the horizontal structure of each layer and the stiffened column anchor connection.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1948633A (en) * | 2005-10-14 | 2007-04-18 | 上海市第七建筑有限公司 | Tray type excarvating contrary construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1948633A (en) * | 2005-10-14 | 2007-04-18 | 上海市第七建筑有限公司 | Tray type excarvating contrary construction method |
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