CN105804084B - A kind of small excavation method for closing on deep pit excavation - Google Patents
A kind of small excavation method for closing on deep pit excavation Download PDFInfo
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- CN105804084B CN105804084B CN201610182589.0A CN201610182589A CN105804084B CN 105804084 B CN105804084 B CN 105804084B CN 201610182589 A CN201610182589 A CN 201610182589A CN 105804084 B CN105804084 B CN 105804084B
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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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Abstract
The invention discloses a kind of small excavation method for closing on deep pit excavation, by deep basal pit bottom close to the grouser of small foundation ditch cut after form an excavation door；The soil body dug in small foundation ditch is drawn by excavating door, so that the soil body in small foundation ditch drops to the waist rail support absolute altitude of deep basal pit, corresponding waist rail of being constructed in small foundation ditch is supported, the reserved steel bar connection of reinforcing bar waist rail support corresponding to deep basal pit in small foundation ditch in corresponding waist rail support, so circulation, arrives its corresponding absolute altitude until small foundation ditch and deep basal pit are dug, solves the problem that Adjacent Pit is unable to synchronous construction, the duration is saved, project cost is saved；It ensure that agent structure energy one-shot forming, it is ensured that structure stress is stable, solves agent structure waterproof hidden danger.It ensure that the safety during two excavation of foundation pit.
Description
Technical field
Deep pit excavation is closed on the present invention relates to a kind of excavation of foundation pit in construction research field, particularly one kind
Small excavation method.
Background technology
The factor such as changing due to being moved during metro station construction in recent years by traffic data process, pipeline is influenceed, in the foundation pit construction phase
Between, will have foundation ditch can not locally construct, and can only do temporarily isolating stake and foundation ditch is divided into two even more than foundation pit construction,
After traffic data process or issue pipeline are solved, main foundation ditch has excavated and has completed each layer Construction of Supporting., can only according to conventional construction method
Completed etc. main excavation of foundation pit and excavate adjacent small foundation ditch after agent structure of constructing again, will by the form of reinforced bar straight thread joint
Two parts main body is connected.
The traditional construction method of the above has the disadvantages that：(1), main foundation pit construction completes small foundation ditch of constructing again, on the duration
There to be larger delay；(2), engineering cost is larger, administration fee increase；(3) agent structure is unable to one-shot forming, in main base
After the completion of the main structure construction of hole, then small foundation pit structure of constructing, it is easily destroyed waterproof layer, and reinforced bar straight thread joint form stress
It is bad.
The content of the invention
The purpose of the present invention, is to provide a kind of small excavation method for closing on deep pit excavation.
The present invention solve its technical problem solution be：A kind of small excavation for closing on deep pit excavation
Method, comprises the following steps,
1）Deep basal pit normally it is lower dig while, to deep basal pit outside wait dig the surrounding arrangement building enclosure of small foundation ditch, open
Dig at the absolute altitude that the earthwork in small foundation ditch is supported to the Guan Liang of deep basal pit first, abolish coagulation unnecessary on corresponding pile crown on deep basal pit
Soil；
2）The small Guan Liang of foundation ditch first of being constructed in small foundation ditch support, the small Guan Liang of foundation ditch first support one end spacer bar and
In the reserved steel bar connection of the Guan Liang of deep basal pit first support, the spacer bar and small foundation ditch of the small Guan Liang of the foundation ditch first support other end
The reserved steel bar connection of building enclosure；
3）After the concrete strength that the small Guan Liang of foundation ditch first is supported reaches design requirement, by deep basal pit bottom close to small base
The grouser in hole forms an excavation door after cutting；
4）The soil body dug in small foundation ditch is drawn by excavating door so that the soil body in small foundation ditch drops to the waist rail branch of deep basal pit
Support at absolute altitude, corresponding waist rail support of being constructed in small foundation ditch, corresponding waist rail supports the reinforcing bar and deep basal pit of one end in small foundation ditch
In corresponding waist rail support reserved steel bar connection, is enclosed in the spacer bar and small foundation ditch of the corresponding waist rail support other end in small foundation ditch
The corresponding reserved steel bar connection of protection structure；
5）Repeat step 4）, small foundation ditch and deep pit digging to its corresponding designed elevation.
As the further improvement of above-mentioned technical proposal, in step 4）In, corresponding waist rail support of being constructed in small foundation ditch
Before, excision, which is located at, causes the upper of deep basal pit and small foundation ditch after pile body between support between deep basal pit and small foundation ditch and interim waist rail
Portion is connected, and pile body between the support of excision and interim waist rail are hung out into deep basal pit or/and small foundation ditch.
As the further improvement of above-mentioned technical proposal, in step 5）In, to the bottom of small excavation of foundation pit and small foundation ditch and
After the bottom of deep basal pit is flushed, small foundation ditch and deep basal pit are excavated simultaneously so that both reach its corresponding designed elevation.
As the further improvement of above-mentioned technical proposal, in step 5）In, while to small excavation of foundation pit, continue to depth
Excavation of foundation pit, deep basal pit first reaches designed elevation, by deep basal pit bottom close to the grouser of small foundation ditch cut after formed one open
Door is dug, the soil body dug in small foundation ditch is drawn by excavating door so that the waist rail that the soil body in small foundation ditch drops to deep basal pit supports mark
Eminence, after so repeating so that small foundation ditch reaches its corresponding designed elevation.
As the further improvement of above-mentioned technical proposal, during excavation of foundation pit, each item data of foundation ditch is detected.
As the further improvement of above-mentioned technical proposal, the soil body in small foundation ditch is excavated from excavation door by excavator.
The beneficial effects of the invention are as follows：The present invention solves the problem that Adjacent Pit is unable to synchronous construction, saves the duration,
Save project cost；It ensure that agent structure energy one-shot forming, it is ensured that structure stress is stable, solves agent structure waterproof
Hidden danger.It ensure that the safety during two excavation of foundation pit.The present invention is applied to that soil body self-stability is good, ground without larger water recharging
Matter condition.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present invention, rather than is all implemented
Example, those skilled in the art on the premise of not paying creative work, can also obtain other designs according to these accompanying drawings
Scheme and accompanying drawing.
Diagrammatic cross-section when Fig. 1 is the construction of the present invention；
Fig. 2 is the diagrammatic cross-section after the soil body tenesmus in medium and small foundation ditch of the invention.
Embodiment
The technique effect of the design of the present invention, concrete structure and generation is carried out below with reference to embodiment and accompanying drawing clear
Chu, it is fully described by, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright a part of embodiment, rather than whole embodiments, based on embodiments of the invention, those skilled in the art is not paying
The other embodiment obtained on the premise of creative work, belongs to the scope of protection of the invention.In addition, be previously mentioned in text
All connection/annexations, not singly refer to component and directly connect, and refer to be added deduct by adding according to specific implementation situation
Few couple auxiliary, to constitute more excellent draw bail.
Embodiment one shown in 1~Fig. 2 of reference picture, a kind of small excavation method for closing on deep pit excavation,
Comprise the following steps,
1）Deep basal pit 1 normally it is lower dig while, to deep basal pit 1 outside wait dig the surrounding arrangement building enclosure of small foundation ditch,
The earthwork excavated in small foundation ditch 2 is supported to the Guan Liang of deep basal pit first at 10 absolute altitude, abolishes unnecessary on corresponding pile crown on deep basal pit 1
Concrete；
2）The small Guan Liang of foundation ditch first support 20 of construction in small foundation ditch 2, the small Guan Liang of foundation ditch first supports the support of 20 one end
Reinforcing bar and the reserved steel bar connection of the Guan Liang of deep basal pit first support 10, the small Guan Liang of foundation ditch first support the spacer bar of 20 other ends
Connected with the reserved steel bar of the building enclosure in small foundation ditch；
3）It is after the concrete strength of the small Guan Liang of foundation ditch first support 20 reaches design requirement, the bottom of deep basal pit 1 is close
The grouser 30 of small foundation ditch 2 forms an excavation door 3 after cutting；
4）The soil body in small foundation ditch 2 is excavated from excavation door 3 by excavator 4 so that the soil body in small foundation ditch 2 drops to depth
At the waist rail support absolute altitude of foundation ditch 1, corresponding waist rail supports one end in the corresponding waist rail support of construction, small foundation ditch 2 in small foundation ditch 2
The support of reinforcing bar corresponding to deep basal pit 1 waist rail reserved steel bar connection, corresponding waist rail supports the support of the other end in small foundation ditch 2
The corresponding reserved steel bar connection of building enclosure in reinforcing bar and small foundation ditch；Construct before corresponding waist rail support, cut off in small foundation ditch 2
Cause the top of deep basal pit 1 and small foundation ditch 2 between support between deep basal pit 1 and small foundation ditch 2 after pile body and interim waist rail
Connection, deep basal pit 1 or/and small foundation ditch 2 are hung out by pile body between the support of excision and interim waist rail；
5）Repeat step 4）, small foundation ditch 2 is excavated and after the bottom of small foundation ditch 2 and the bottom of deep basal pit 1 flush, to small base
Hole 2 and deep basal pit 1 are excavated simultaneously so that both reach its corresponding designed elevation；During excavation of foundation pit, detection foundation ditch is every
Data, it is ensured that deep pit monitor.
The present invention solves the problem that Adjacent Pit is unable to synchronous construction, saves the duration, saves project cost；Ensure
Agent structure energy one-shot forming, it is ensured that structure stress is stable, solves agent structure waterproof hidden danger.It ensure that two foundation ditches
Safety during excavation.The present invention is applied to that soil body self-stability is good, geological conditions without larger water recharging.
The present invention also provides the work progress of embodiment two, as follows：
1）Deep basal pit 1 normally it is lower dig while, to deep basal pit 1 outside wait dig the surrounding arrangement building enclosure of small foundation ditch 2,
The earthwork excavated in small foundation ditch 2 is supported to the Guan Liang of deep basal pit first at 10 absolute altitude, abolishes unnecessary on corresponding pile crown on deep basal pit 1
Concrete；
2）The small Guan Liang of foundation ditch first support 20 of construction in small foundation ditch 2, the small Guan Liang of foundation ditch first supports the support of 20 one end
Reinforcing bar and the reserved steel bar connection of the Guan Liang of deep basal pit first support 10, the small Guan Liang of foundation ditch first support the spacer bar of 20 other ends
With the reserved steel bar connection of building enclosure in small foundation ditch；
3）It is after the concrete strength of the small Guan Liang of foundation ditch first support 20 reaches design requirement, the bottom of deep basal pit 1 is close
The grouser 30 of small foundation ditch 2 forms an excavation door 3 after cutting；
4）The soil body in small foundation ditch 2 is excavated from excavation door 3 by excavator 4 so that the soil body in small foundation ditch 2 drops to depth
At the waist rail support absolute altitude of foundation ditch 1, corresponding waist rail supports one end in the corresponding waist rail support of construction, small foundation ditch 2 in small foundation ditch 2
The support of reinforcing bar corresponding to deep basal pit 1 waist rail reserved steel bar connection, corresponding waist rail supports the support of the other end in small foundation ditch 2
The corresponding reserved steel bar connection of building enclosure in reinforcing bar and small foundation ditch；Construct before corresponding waist rail support, cut off in small foundation ditch 2
Cause the top of deep basal pit 1 and small foundation ditch 2 between support between deep basal pit 1 and small foundation ditch 2 after pile body and interim waist rail
Connection, deep basal pit 1 or/and small foundation ditch 2 are hung out by pile body between the support of excision and interim waist rail；
5）Repeat step 4）, while being excavated to small foundation ditch 2, continuation is excavated to deep basal pit 1, and deep basal pit 1, which first reaches, to be set
Count absolute altitude, by the bottom of deep basal pit 1 close to the grouser 30 of small foundation ditch 2 cut after formed one excavation door 3, drawn by excavating door 3
The soil body dug in small foundation ditch 2 so that the soil body in small foundation ditch 2 drops to next Guan Liang support absolute altitude of deep basal pit 1, so
After repeating so that small foundation ditch 2 reaches its corresponding designed elevation.During excavation of foundation pit, each item data of foundation ditch is detected, it is ensured that base
Hole safety.
Above is the better embodiment to the present invention is illustrated, but the invention is not limited to the reality
Apply example, those skilled in the art can also make a variety of equivalent modifications or replace on the premise of without prejudice to spirit of the invention
Change, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (6)
1. a kind of small excavation method for closing on deep pit excavation, it is characterised in that：Comprise the following steps,
1）Deep basal pit normally it is lower dig while, to deep basal pit outside wait dig the surrounding arrangement building enclosure of small foundation ditch, excavate small
At the absolute altitude that the earthwork in foundation ditch is supported to the Guan Liang of deep basal pit first, concrete unnecessary on corresponding pile crown on deep basal pit is abolished；
2）The small Guan Liang of foundation ditch first of being constructed in small foundation ditch is supported, and the small Guan Liang of foundation ditch first supports the spacer bar and deep base of one end
Cheat and gone along with sb. to guard him in the reserved steel bar connection of the first Guan Liang support, the spacer bar and small foundation ditch of the small Guan Liang of the foundation ditch first support other end
The reserved steel bar connection of structure；
3）After the concrete strength that the small Guan Liang of foundation ditch first is supported reaches design requirement, by deep basal pit bottom close to small foundation ditch
Grouser forms an excavation door after cutting；
4）The soil body dug in small foundation ditch is drawn by excavating door so that the waist rail that the soil body in small foundation ditch drops to deep basal pit supports mark
Corresponding waist rail supports the reinforcing bar of one end and phase in deep basal pit in eminence, corresponding waist rail support of being constructed in small foundation ditch, small foundation ditch
Answer in the reserved steel bar connection that waist rail is supported, small foundation ditch and go along with sb. to guard him knot in the spacer bar and small foundation ditch of the corresponding waist rail support other end
The corresponding reserved steel bar connection of structure；
5）Repeat step 4）, small foundation ditch and deep pit digging to its corresponding designed elevation.
2. the small excavation method according to claim 1 for closing on deep pit excavation, it is characterised in that：In step
Rapid 4）In, constructed in small foundation ditch before corresponding waist rail support, excision is located at pile body between the support between deep basal pit and small foundation ditch
And after interim waist rail deep basal pit is connected with the top of small foundation ditch, pile body between the support of excision and interim waist rail are hung out
Deep basal pit or/and small foundation ditch.
3. the small excavation method according to claim 1 for closing on deep pit excavation, it is characterised in that：In step
Rapid 5）In, after being flushed to the bottom of the bottom and deep basal pit of small excavation of foundation pit and small foundation ditch, small foundation ditch and deep basal pit are opened simultaneously
Dig so that both reach its corresponding designed elevation.
4. the small excavation method according to claim 1 for closing on deep pit excavation, it is characterised in that：In step
Rapid 5）In, while to small excavation of foundation pit, continue to deep pit digging, deep basal pit first reaches designed elevation, by deep basal pit bottom
Portion close to the grouser of small foundation ditch cut after form an excavation door, draw the soil body dug in small foundation ditch by excavating door so that small
The soil body in foundation ditch drops to the waist rail support absolute altitude of deep basal pit, after so repeating so that small foundation ditch reaches that it sets accordingly
Count absolute altitude.
5. the small excavation method for closing on deep pit excavation according to any one of claim 1 ~ 4, its feature
It is：During excavation of foundation pit, each item data of foundation ditch is detected.
6. the small excavation method for closing on deep pit excavation according to any one of claim 1 ~ 4, its feature
It is：The soil body in small foundation ditch is excavated from excavation door by excavator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610182589.0A CN105804084B (en) | 2016-03-25 | 2016-03-25 | A kind of small excavation method for closing on deep pit excavation |
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| CN201610182589.0A CN105804084B (en) | 2016-03-25 | 2016-03-25 | A kind of small excavation method for closing on deep pit excavation |
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| CN105804084A CN105804084A (en) | 2016-07-27 |
| CN105804084B true CN105804084B (en) | 2017-08-29 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592606A (en) * | 2017-01-19 | 2017-04-26 | 中铁开发投资有限公司 | Foundation pit support construction method suitable for three-free-face building envelope |
| CN109629577A (en) * | 2018-12-14 | 2019-04-16 | 山东大学 | A kind of Adjacent Pit successively excavates co-walled structural support system and construction method |
| CN114922191B (en) * | 2022-05-18 | 2024-03-12 | 中国建筑第八工程局有限公司 | Construction method for narrow foundation pit in multiple foundation pits |
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2016
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| EP0754805A1 (en) * | 1995-07-19 | 1997-01-22 | Dyckerhoff Aktiengesellschaft | Excavation , method and material used for its manufacture |
| CN102031781A (en) * | 2009-09-24 | 2011-04-27 | 上海市第一建筑有限公司 | Foundation pit reinforcing technology from shallow position to deep position for group pit construction |
| CN102465534A (en) * | 2010-11-11 | 2012-05-23 | 上海市第五建筑有限公司 | Construction method for adjacent double ditches |
| CN202298627U (en) * | 2011-09-08 | 2012-07-04 | 广东省基础工程公司 | Foundation pit supporting structure |
| CN202767087U (en) * | 2012-06-20 | 2013-03-06 | 上海建工二建集团有限公司 | Top ring beam sharing device for sequential excavation of adjacent foundation pits |
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