CN108625375A - A kind of foundation pit slope construction order and construction method - Google Patents
A kind of foundation pit slope construction order and construction method Download PDFInfo
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- CN108625375A CN108625375A CN201810666753.4A CN201810666753A CN108625375A CN 108625375 A CN108625375 A CN 108625375A CN 201810666753 A CN201810666753 A CN 201810666753A CN 108625375 A CN108625375 A CN 108625375A
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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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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a kind of foundation pit slope construction order and construction methods, earth excavation including cheating slope, the earth excavation layer and section for cheating slope carry out, and each layer digs 2.5m down by original ground, it to be dug to this layer of bracing members bottom 500mm at bracing members position, sequence of excavation is：From east to west, from top to bottom, the order of layer and section is excavated, meanwhile, carry out corresponding waist rail and bracing members construction operation；Excavating principle is：Vertical layered, longitudinal divisions, intermediate kerve excavate；Its earth excavation layer and section carries out, and sequence of excavation is：From east to west, from top to bottom, the order of layer and section is excavated, meanwhile, corresponding waist rail and bracing members construction operation are carried out, excavating principle is：Vertical layered, longitudinal divisions, intermediate kerve excavate；And vertical, the horizontal transport of middle part grooving and foundation pit are carried out successively, foundation pit slope is excavated orderly so that foundation pit can crack or cave in, and shorten the construction period, reduce construction cost and difficulty of construction.
Description
Technical field
The present invention relates to the technical fields of earth excavation, more specifically, it relates to which a kind of foundation pit slope excavation construction is suitable
Sequence and construction method.
Background technology
Along subway and when the construction and excavation earthwork of protection zone, when earth excavation, it can inevitably lead to the protuberance in soil, because
This applies man-hour requirement and takes certain safeguard measure, reduces the adverse effect to subway, especially in subway work, foundation pit is put
The processing that slope is excavated is particularly important.Nowadays during practice of construction, the foundation construction difficulty such as Collapsible Loess District is big,
Long construction period, and the quality of its construction quality directly affects the safe to use of built works.Such as in collapsible loess
When area carries out extensive Deep Foundation Ditch Construction of Metro, the formation to construction area collapsible loess and Collapsing Deformation are needed first
Characteristic index carries out comprehensive analysis, and on the basis of comprehensive analysis, in conjunction with the design structure of constructed subway station and whole
Body stability and service life demand, the deep basal pit foundation structure of the constructed subway station of appropriate design, and accordingly determine a set of
Rational Deep Foundation Ditch Construction of Metro method, nowadays, when practical Deep Foundation Ditch Construction of Metro, generally use underground is continuous
The construction method of wall is constructed.But when practice of construction, since the geological condition of Collapsible Loess District is generally all more multiple
Miscellaneous, practice of construction difficulty is larger, and a variety of inevitable undesirable elements appeared in practice of construction process influence in addition, make
The deep foundation pit construction quality for obtaining subway station hardly results in guarantee.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of foundation pit slope construction order and
Construction method, to solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of foundation pit slope construction order and construction method, include the following steps：
Step 1: the earth excavation of hole slope：
The earth excavation layer and section for cheating slope carries out, and each layer digs 2.5m by original ground, wanted at bracing members position down
It digs to this layer of bracing members bottom 500mm, sequence of excavation is：From east to west, from top to bottom, the order of layer and section is excavated, together
When, carry out corresponding waist rail and bracing members construction operation；
Earth excavation sequence：
Excavating principle is：Vertical layered, longitudinal divisions, intermediate kerve excavate；
Vertical layered, longitudinal divisions：
Under first layer earth excavation to first layer bracing members at 50cm, first layer bracing members of constructing；It excavates deeply for every layer below
Degree is that 3.5m performs step, step height 1.5m, to below second layer bracing members at every layer close to slope protection pile position simultaneously
When 50cm, construct second layer bracing members and its waist rail；Then 3.5m is excavated in the earthwork again, and spray Anchor Care slope is excavated to third layer steel branch
When the 50cm of support lower section, construct third layer bracing members and its waist rail, and so on last earth excavation to substrate；
Step 2: middle part grooving：
When earth excavation, flat excavation construction is taken in slope protection pile cap depth bounds, is 1.5m per layer thickness；
The platform of 6.0m wide, platform is respectively stayed to block up the percolating water of building enclosure and carry out bracing members installation along fender post both sides,
Excavate the earthwork at reserved platform position again before carrying out following one layer of earth excavation；
Step 3: vertical, the horizontal transport of foundation pit：
Earthwork horizontal transport in foundation pit is transported with truck, is transported outward through riding track, and part is under bracing members and slope protection pile
Neighbouring mechanical excavation less than place transported outward at trolley muck haulage to mechanical excavation, then by mechanical excavation by hand excavation,
Riding track ending takes excavator to cut the earth, and last surplus earth is by hand excavation, truck crane lifting outward transport；
When cubic metre of earth ending vertical transport, truck crane should be greater than 2m close to foundation pit side leg apart from foundation pit, according to live needs,
It is 2.4t that work range, which selects 14m, brachium 24.9m, lifting weight, and dress native hanging basket in scene holds earthwork 0.8m3, use automobile
It hangs.
Further, in the step 1, earth excavation is backacter.
Further, in the step one, the region that earth excavation is divided according to structure construction, from the foundation pit south, head is fallen back
It excavates, each section of excavation is unearthed by interior riding track, riding track width 7-8m, and the gradient is 20 degree, ramp both sides slope 1:0.75.
Further, with excavator relay, soil, the receipts soil of the increasing riding track earthwork, surplus earth pass through when the riding track receives soil
Hand fit's crane is unearthed and entrucking outward transport.
Further, the scene is quasi- arranges 2 excavators construction operation simultaneously, it is contemplated that be unearthed 1000m daily3, when peak
Phase is 1200m3/ day.
Further, in the step 1, vertical layered height by agent structure size, supporting depth and bracing members array pitch with
And excavator maximum is excavated ability and is determined, elder generation's center kerve when earth excavation, after install bracing members, then clear up both sides step soil
Side.
In conclusion the present invention has the advantages that compared with prior art：
The foundation pit slope construction order and construction method of the present invention, earth excavation layer and section carry out, and excavate suitable
Sequence is：From east to west, from top to bottom, the order of layer and section is excavated, meanwhile, carry out corresponding waist rail and bracing members construction
Operation, excavating principle is：Vertical layered, longitudinal divisions, intermediate kerve excavate；And successively carry out middle part grooving and foundation pit hang down
Directly, horizontal transport, foundation pit slope are excavated orderly so that foundation pit can crack or cave in, and shorten the construction period, reduce and be constructed into
Sheet and difficulty of construction.
More clearly to illustrate the structure feature and effect of the present invention, come below in conjunction with the accompanying drawings to this hair with specific embodiment
It is bright to be described in detail.
Description of the drawings
Fig. 1 is that the foundation pit slope of the present invention excavates schematic diagram.
Reference numeral：1- first layers bracing members, 2- second layers bracing members, 3- third layer bracing members, 4- platforms.
Specific implementation mode
The following further describes the technical solution of the present invention in the following with reference to the drawings and specific embodiments.
Referring to Fig. 1, a kind of foundation pit slope construction order and construction method include the following steps：
Step 1: the earth excavation of hole slope：
The earth excavation layer and section for cheating slope carries out, and each layer digs 2.5m by original ground, wanted at bracing members position down
It digs to this layer of bracing members bottom 500mm, earth excavation is using backacter, sequence of excavation：From east to west, from top to bottom, divide
The order of layer segmentation is excavated.Meanwhile the orderly corresponding waist rail of carry out and bracing members construction operation according to plan.Earth excavation
According to the region that structure construction divides, from the foundation pit south, head, which is fallen back, excavates, and each section of excavation is unearthed by interior riding track.Riding track width 7-
8m, the gradient are 20 degree, ramp both sides slope 1:0.75.It is native that riding track uses excavator relay to fall when receiving soil, and increases riding track as possible
The receipts soil of the earthwork, last surplus earth is unearthed using hand fit's crane and entrucking is transported outward.
Scene is quasi- to arrange 2 excavators construction operation simultaneously, it is contemplated that be unearthed 1000m daily3, peak time 1200m3/
It.
Specifically, earth excavation sequence：
Mainly excavating principle is：Vertical layered, longitudinal divisions, intermediate kerve excavate.
Vertical layered, longitudinal divisions：
Vertical layered height excavates ability by agent structure size, supporting depth and bracing members array pitch and excavator maximum
It determines.At first layer earth excavation to 1 time 50cm of first layer bracing members, construction first layer bracing members 1；Every layer of cutting depth below
For 3.5m (while performing step close to slope protection pile position at every layer, step height 1.5m, convenient for spray anchor slope protection construction), to the
When two layers of 2 lower section 50cm of bracing members, construction second layer bracing members 2 and its waist rail；Then 3.5m is excavated in the earthwork again, sprays Anchor Care slope,
When being excavated to 3 lower section 50cm of third layer bracing members, construction third layer bracing members 3 and its waist rail, and so on last earth excavation
To substrate.Elder generation center kerve when earth excavation, after install bracing members, then clear up the both sides step earthwork.Bracing members are constructed and the earthwork
Excavation forms continuous productive process, and to achieve the purpose that shorten the construction period, foundation pit slope excavation is shown in Fig. 1.
Step 2: middle part grooving：
When earth excavation, flat excavation construction is taken in slope protection pile cap depth bounds, is 1.5m or so per layer thickness, to protect
Demonstrate,prove the safety of construction and performing for stake top cap.
The platform 4 that 6.0m wide is respectively stayed along fender post both sides makes full use of its resistance of soil to ensure the stabilization of building enclosure, again
It can carry out blocking the percolating water of building enclosure in time using this platform 4 and carry out bracing members installation, it is ensured that be applied in bracing members
Working hour earth excavation carries out as usual, to accelerate construction progress.4, reserved platform is excavated again before carrying out following one layer of earth excavation
The earthwork of position.
Step 3: vertical, the horizontal transport of foundation pit：
Earthwork horizontal transport in foundation pit is transported using truck, is transported outward through riding track.Part is under bracing members and bank protection
Stake nearby mechanical excavation less than place, by hand excavation, at trolley muck haulage to mechanical excavation, then by mechanical excavation outside
Fortune.Riding track ending takes excavator to cut the earth, and last surplus earth is by hand excavation, truck crane lifting outward transport.
When cubic metre of earth ending vertical transport, truck crane should be greater than 2m close to foundation pit side leg apart from foundation pit, according to live needs,
14m may be selected in work range, and brachium can be 24.9m, and lifting weight is 2.4t.Dress native hanging basket in scene holds earthwork 0.8m3, automobile
Live needs can be met by hanging.
It should be strongly noted that following earth excavation working measure：
Section for that cannot apply support in time should be noted that kerve excavates, stays native retaining wall.It is answered during earthwork evacuation
Pay attention to cheating the protection of internal drainage facility, it is ensured that the normal operation of drainage system.Transport sidewalk should set special messenger's finishing, it is ensured that transport peace
Entirely, efficiency is improved.The soil layer that 15~30cm of hand fit, especially substrate or more should be aided with while mechanical excavation should be with artificial
Based on excavation, to reduce the original state structure for hole subsoil body of backbreaking, keep.
During earth excavation, observation and monitoring measurement work should be reinforced, to find construction safety hidden danger, and passed through
Monitoring feedback adjusts excavation sequence in time.
For weight away from slight slope safe distance, automobile is not less than 3m, and the earthwork, which is stacked, is not less than 1m, and mound height is no more than 1.5m, material
Material heap is put not less than 1m.
The technical principle that the present invention is described above in association with specific embodiment, is only the preferred embodiment of the present invention.This
The protection domain of invention is not limited merely to above-described embodiment, and all technical solutions belonged under thinking of the present invention belong to the present invention
Protection domain.Those skilled in the art would not require any inventive effort the other specific realities that can associate the present invention
Mode is applied, these modes are fallen within protection scope of the present invention.
Claims (6)
1. a kind of foundation pit slope construction order and construction method, which is characterized in that include the following steps：
Step 1: the earth excavation of hole slope：
The earth excavation layer and section for cheating slope carries out, and each layer digs 2.5m down by original ground, bracing members position to dig to
This layer of bracing members bottom 500mm, sequence of excavation are：From east to west, from top to bottom, the order of layer and section is excavated, meanwhile, into
The corresponding waist rail of row and bracing members construction operation；
Earth excavation sequence：
Excavating principle is：Vertical layered, longitudinal divisions, intermediate kerve excavate；
Vertical layered, longitudinal divisions：
Under first layer earth excavation to first layer bracing members at 50cm, first layer bracing members of constructing；Every layer of cutting depth is below
3.5m performs step at every layer close to slope protection pile position simultaneously, step height 1.5m, to second layer bracing members below 50cm when,
Construction second layer bracing members and its waist rail；Then 3.5m is excavated in the earthwork again, and spray Anchor Care slope is excavated to below third layer bracing members
When 50cm, construct third layer bracing members and its waist rail, and so on last earth excavation to substrate；
Step 2: middle part grooving：
When earth excavation, flat excavation construction is taken in slope protection pile cap depth bounds, is 1.5m per layer thickness；
Respectively stay the platform of 6.0m wide along fender post both sides, platform blocks up the percolating water of building enclosure and carries out bracing members installation, into
The earthwork at reserved platform position is excavated before the following one layer of earth excavation of row again；
Step 3: vertical, the horizontal transport of foundation pit：
Earthwork horizontal transport in foundation pit is transported with truck, is transported outward through riding track, and part is under bracing members and near slope protection pile
Mechanical excavation less than place transported outward at trolley muck haulage to mechanical excavation, then by mechanical excavation, riding track by hand excavation
Ending takes excavator to cut the earth, and last surplus earth is by hand excavation, truck crane lifting outward transport；
When earthwork ending vertical transport, truck crane should be greater than 2m close to foundation pit side leg apart from foundation pit, according to live needs, work
It is 2.4t that amplitude, which selects 14m, brachium 24.9m, lifting weight, and dress native hanging basket in scene holds earthwork 0.8m3, use truck crane.
2. a kind of foundation pit slope construction order according to claim 1 and construction method, which is characterized in that described
In step 1, earth excavation is backacter.
3. a kind of foundation pit slope construction order according to claim 1 and construction method, which is characterized in that described
In step 1, the region that earth excavation is divided according to structure construction, from the foundation pit south, head, which is fallen back, excavates, and each section is excavated by interior riding track
It is unearthed, riding track width 7-8m, the gradient is 20 degree, ramp both sides slope 1:0.75.
4. a kind of foundation pit slope construction order according to claim 3 and construction method, which is characterized in that the horse
With excavator relay, soil, the receipts soil of the increasing riding track earthwork, surplus earth are unearthed and are filled by hand fit's crane when soil is received in road
Vehicle is transported outward.
5. a kind of foundation pit slope construction order according to claim 4 and construction method, which is characterized in that scene is quasi-
Arrange 2 excavators construction operation simultaneously, it is contemplated that be unearthed 1000m daily3, peak time 1200m3/ day.
6. a kind of foundation pit slope construction order according to claim 1 and construction method, which is characterized in that the step
In rapid one, vertical layered height excavates ability by agent structure size, supporting depth and bracing members array pitch and excavator maximum
Determine, elder generation's center kerve when earth excavation, after install bracing members, then clear up the both sides step earthwork.
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| CN201810666753.4A CN108625375A (en) | 2018-06-26 | 2018-06-26 | A kind of foundation pit slope construction order and construction method |
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| CN201810666753.4A CN108625375A (en) | 2018-06-26 | 2018-06-26 | A kind of foundation pit slope construction order and construction method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109594564A (en) * | 2019-01-22 | 2019-04-09 | 中铁建大桥工程局集团第五工程有限公司 | A kind of anti-collapse construction method of Metro Deep Excavation open cut |
| CN109914478A (en) * | 2019-04-02 | 2019-06-21 | 中交铁道设计研究总院有限公司 | A kind of Blasting Excavation continued access diaphram wall construction subway station method |
| CN110158603A (en) * | 2019-06-14 | 2019-08-23 | 北京翔鲲水务建设有限公司 | Long and narrow deep foundation pit earthwork digging method |
| CN111778984A (en) * | 2020-06-28 | 2020-10-16 | 苏州建设（集团）有限责任公司 | Construction method of deep foundation pit and intelligent detection system thereof |
| CN112922028A (en) * | 2021-02-02 | 2021-06-08 | 中铁四局集团有限公司 | Construction method suitable for oversized circular subway station |
| CN113235603A (en) * | 2021-05-21 | 2021-08-10 | 中建七局安装工程有限公司 | Civil air defense engineering foundation pit earthwork construction method |
| CN114908761A (en) * | 2022-06-08 | 2022-08-16 | 中国二十冶集团有限公司 | Excavation construction method of foundation pit |
| CN114991159A (en) * | 2022-05-16 | 2022-09-02 | 中铁六局集团有限公司 | Subway station deep foundation pit riding track type rapid unearthing construction method |
-
2018
- 2018-06-26 CN CN201810666753.4A patent/CN108625375A/en active Pending
Non-Patent Citations (1)
| Title |
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| 561233: "熊猫环岛站土方工程施工方案", 《360DOC》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109594564A (en) * | 2019-01-22 | 2019-04-09 | 中铁建大桥工程局集团第五工程有限公司 | A kind of anti-collapse construction method of Metro Deep Excavation open cut |
| CN109914478A (en) * | 2019-04-02 | 2019-06-21 | 中交铁道设计研究总院有限公司 | A kind of Blasting Excavation continued access diaphram wall construction subway station method |
| CN110158603A (en) * | 2019-06-14 | 2019-08-23 | 北京翔鲲水务建设有限公司 | Long and narrow deep foundation pit earthwork digging method |
| CN111778984A (en) * | 2020-06-28 | 2020-10-16 | 苏州建设（集团）有限责任公司 | Construction method of deep foundation pit and intelligent detection system thereof |
| CN111778984B (en) * | 2020-06-28 | 2021-10-29 | 苏州建设（集团）有限责任公司 | Construction method of deep foundation pit and intelligent detection system thereof |
| CN112922028A (en) * | 2021-02-02 | 2021-06-08 | 中铁四局集团有限公司 | Construction method suitable for oversized circular subway station |
| CN113235603A (en) * | 2021-05-21 | 2021-08-10 | 中建七局安装工程有限公司 | Civil air defense engineering foundation pit earthwork construction method |
| CN114991159A (en) * | 2022-05-16 | 2022-09-02 | 中铁六局集团有限公司 | Subway station deep foundation pit riding track type rapid unearthing construction method |
| CN114908761A (en) * | 2022-06-08 | 2022-08-16 | 中国二十冶集团有限公司 | Excavation construction method of foundation pit |
| CN114908761B (en) * | 2022-06-08 | 2023-07-21 | 中国二十冶集团有限公司 | Excavation construction method for foundation pit |
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Application publication date: 20181009 |
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