CN106193053B - A kind of subway foundation pit assembled horizontal struts system and its assembling constructing method - Google Patents
A kind of subway foundation pit assembled horizontal struts system and its assembling constructing method Download PDFInfo
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- CN106193053B CN106193053B CN201610812925.5A CN201610812925A CN106193053B CN 106193053 B CN106193053 B CN 106193053B CN 201610812925 A CN201610812925 A CN 201610812925A CN 106193053 B CN106193053 B CN 106193053B
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- Prior art keywords
- foundation pit
- horizontally
- enclosure structure
- supported platform
- horizontal struts
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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
Abstract
A kind of subway foundation pit assembled horizontal struts system and its assembling constructing method, the system includes the horizontally-supported platform being horizontally supported between foundation pit enclosure structure, the horizontally-supported platform is uniformly distributed along the length and short transverse parallel interval of foundation pit, force transmission mechanism is connected between the horizontally-supported platform and foundation pit enclosure structure, the force transmission mechanism is evenly spaced on along the side of horizontally-supported platform.The present invention realizes effective assembled between horizontally-supported platform and foundation pit enclosure structure using force transmission mechanism and connects, the force transmission mechanism is set between horizontally-supported platform and foundation pit enclosure structure, therefore, force transmission mechanism can drive horizontally-supported platform vertically movable along foundation pit enclosure structure in the case where bearing horizontal supporting force, facilitate and carries out the quick vertically movable of multiple-layer horizontal support platform, ensure that each layer is adjusted in assembling process, construction efficiency is high, and safely and effectively.
Description
Technical field
The present invention relates to building engineering field, especially a kind of subway foundation pit construction system and its construction method.
Background technique
Currently, the main support system used for subway foundation pit is mainly armored concrete and steel pipe to support, especially
Steel pipe support therein, horizontally disposed spacing are often no more than 3m.Based on subway station, long and narrow, rectangle flat shape is special
Point, subway foundation pit earth excavation generally use step to move back the method for digging relay and carry out.Due to the spacing mistake of horizontally-supported setting
In close, operation side is small, and earth excavation machinery often uses the smaller excavating equipment of dipper capacity, by way of step relay
Earth excavation is completed, earth excavation working efficiency is greatly reduced；On the other hand, when steel pipe support is lifted by root, because compared with
Close horizontally-supported spacing, it is necessary to which it is still necessary to be supported end welding after avoiding the mutual collision supported when lifting, lifting in place
Fixed and support pre-stress construction, supports difficult to install, construction efficiency underground.
It is well known that pit earthwork excavates the principle progress that must comply with " first support and dig afterwards ", found by investigation, even if adopting
Earth excavation is carried out with the lesser digging machine of the lower dipper capacity of work efficiency, the installation efficiency of support is also far from satisfying earth excavation and wants
It asks, no matter both earth excavation and support installation temporally and spatially cannot achieve mutual satisfaction, cause horizontally-supported
Installation often lags behind earth excavation, buries huge security risk for base pit engineering.
To sum up, it for the subway foundation pit engineering of current sleeve configuration rule, is opened using existing horizontal struts system and the earthwork
Excavation method causes certain difficulty on duration and safety to engineering construction.
Summary of the invention
The object of the present invention is to provide a kind of subway foundation pit assembled horizontal struts system and its assembling constructing methods, to solve
Not the technical issues of certainly foundation pit construction low efficiency, safety not can guarantee；And solve the problems, such as that foundation pit support assembly process is complicated.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of subway foundation pit assembled horizontal struts system, including the horizontal branch being horizontally supported between foundation pit enclosure structure
Platform is supportted, the horizontally-supported platform is uniformly distributed along the length and short transverse parallel interval of foundation pit, described horizontally-supported
Be connected with force transmission mechanism between platform and foundation pit enclosure structure, the force transmission mechanism along the side of horizontally-supported platform it is uniform between
Every distribution.
The rotation pass that the force transmission mechanism is connected to the jack of horizontally-supported platform end, is connected to jack front end
The rolling wheel support save, being hinged on cradle head and the idler wheel being hinged on rolling wheel support.
The rolling wheel support is that triangular plate either bends strip board at an acute angle, apex angle and cradle head it is hinged,
Two base angles are symmetrically hinged with an idler wheel.
The end of the jack is connect by connecting plate with horizontally-supported platform.
The subway foundation pit assembled horizontal struts system further includes guide rail and lifting drive unit.
The guide rail is arranged along the length direction parallel interval of foundation pit enclosure structure；The guide rail is by rail unit along base
What the short transverse of pit enclosure structure was vertically spliced.
The lifting drive unit is connect by unit rack with horizontally-supported platform.
The unit rack includes the A-frame for being connected to horizontally-supported platform end, is connected to A-frame end
Upper bolt support and the underthrust pin bearing being arranged in parallel in below bolt support.
The counter-force hole of the upper bolt support and underthrust pin bearing respectively by upper bolt and lower bolt and guide rail is detachable
Connection.
The lifting drive unit is hydraulic cylinder, including cylinder barrel and piston rod, and wherein cylinder barrel is fixed with upper bolt support
Connection, one end of piston rod is across upper bolt support is flexibly connected with cylinder barrel, the other end is fixedly connected with underthrust pin bearing.
The force transmission mechanism is connected between horizontally-supported platform and guide rail, and idler wheel is slidably connected with guide rail.
One group of purlin, the purlin are equipped with along foundation pit short transverse parallel interval between the guide rail and foundation pit enclosure structure
Along the elongated setting of the length direction of foundation pit enclosure structure.
A kind of assembling constructing method of subway foundation pit assembled horizontal struts system as mentioned, which is characterized in that specific
Steps are as follows:
Horizontally-supported platform, force transferring structure are assembled into integrated support unit by step 1.
Step 2, by the support unit assembled hang at designed elevation position as first layer support unit.
Step 3, the accurate plan-position for adjusting first layer support unit and verticality.
Step 4 jacks the jack in force transferring structure, pushes up idler wheel tightly solid on foundation pit enclosure structure.
Step 5 is excavated at the first layer soil body to designed elevation position.
Step 6, by another support unit integrally hang at designed elevation position as second layer support unit.
Step 7 is accurate to adjust second layer support unit plan-position and verticality.
Step 8 jacks the jack in force transferring structure, pushes up idler wheel tightly solid on foundation pit enclosure structure.
Step 9 shrinks the jack of first layer support unit force transmission mechanism, using idler wheel along foundation pit enclosure structure row
It walks, drop to first layer support unit at designed elevation position.
Step 10 excavates the second layer soil body.
Step 11 repeats step 6 to step 10, until completing the earth excavation construction of foundation pit.
Compared with prior art the invention has the characteristics that and the utility model has the advantages that
The present invention realizes effective assembled between horizontally-supported platform and foundation pit enclosure structure using force transmission mechanism and connects
It connects, which is set between horizontally-supported platform and foundation pit enclosure structure, including jack, cradle head and idler wheel,
Apply precompression to foundation pit enclosure structure by jack, and provides support force for idler wheel；Jack and rolling wheel support are by turning
Movable joint connection, rolling wheel support can be adjusted as the plane of foundation pit enclosure structure carries out small-scale rotation, and adapt to foundation pit
The rotation of building enclosure and horizontally-supported platform, to ensure that force transmission mechanism can freely walk along foundation pit enclosure structure；Idler wheel
The support force size that can be transmitted according to jack of size calculate and determine, can arrange one or more idler wheels according to calculating and pass through
Cradle head connection is integral.
Precompression can be applied before excavation of foundation pit by jack pair foundation pit enclosure structure, and then controlled in Excavation Process
The deformation of building enclosure horizontal direction, and the support force that idler wheel reaches jack is applied to foundation pit enclosure in the form of line load
Structure drives horizontally-supported platform to move along foundation depth direction in the case where bearing horizontal supporting force, guarantees sub-truss
It remains to play the role of support in the process of moving, therefore, force transmission mechanism can drive in the case where bearing horizontal supporting force
Horizontally-supported platform is vertically movable along foundation pit enclosure structure, facilitates and carries out the quick vertically movable of multiple-layer horizontal support platform, really
It protects each layer in assembling process to adjust, construction efficiency is high, and safely and effectively.
Detailed description of the invention
The present invention will be further described in detail with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention one.
Fig. 2 is the schematic view of the front view of the embodiment of the present invention one.
Fig. 3 is the structural schematic diagram of one force transmission mechanism of the embodiment of the present invention.
Fig. 4 is the structural schematic diagram of the embodiment of the present invention two.
Fig. 5 is the overlooking structure diagram of the embodiment of the present invention two.
Fig. 6 is the schematic view of the front view of the embodiment of the present invention two.
Fig. 7 is the structural schematic diagram of the horizontally-supported platform of the embodiment of the present invention two.
Appended drawing reference: the horizontally-supported platform of 1-, 2- lifting drive unit, 3- guide rail, 4- adjustable seats component, 5-
Foundation pit enclosure structure, 6- unit rack, 7- purlin, 8- force transmission mechanism, 9- idler wheel, 10- jack, 11- cradle head,
12- rolling wheel support, 13- crown beam.
Specific embodiment
Embodiment one referring to shown in Fig. 1, Fig. 2, Fig. 3, prop up by this subway foundation pit assembled horizontal struts system, including level
Support horizontally-supported platform 1 between foundation pit enclosure structure 5, the horizontally-supported platform 1 is along the length of foundation pit and height side
It is uniformly distributed to parallel interval, it is characterised in that: be connected with power transmission between the horizontally-supported platform 1 and foundation pit enclosure structure 5
Mechanism 8, the force transmission mechanism 8 are evenly spaced on along the side of horizontally-supported platform.
It is shown in Figure 3, the force transmission mechanism 8 be connected to the jack 10 of horizontally-supported 1 end of platform, be connected to it is very heavy
Push up cradle head 11, the rolling wheel support 12 being hinged on cradle head 11 and the idler wheel 9 being hinged on rolling wheel support 12 of front end.
The rolling wheel support 12 is that triangular plate either bends strip board at an acute angle, and apex angle and cradle head 11 are cut with scissors
It connects, two base angles are symmetrically hinged with an idler wheel 9.
The end of the jack 10 is connect by connecting plate with horizontally-supported platform 1.
Embodiment two referring to fig. 4, shown in Fig. 5, Fig. 6, Fig. 7, what is different from the first embodiment is that the subway foundation pit assembled
Horizontal struts system further includes guide rail 3 and lifting drive unit 2；The guide rail 3 is parallel along the length direction of foundation pit enclosure structure 5
Interval setting；The guide rail 3 is that the short transverse by rail unit along foundation pit enclosure structure 5 is vertically spliced；It is described to lead
Rail 3 is connect by adjustable seats component 4 with foundation pit enclosure structure 5；The lifting drive unit 2 passes through unit rack 6 and level
Support platform 1 connects.
Shown in Figure 7, the unit rack 6 includes the A-frame for being connected to horizontally-supported 1 end of platform, is connected to
The upper bolt support of A-frame end and the underthrust pin bearing being arranged in parallel in below bolt support；The upper bolt branch
Seat and underthrust pin bearing are detachably connected by the counter-force hole of upper bolt and lower bolt and guide rail respectively.
The lifting drive unit 2 is hydraulic cylinder, including cylinder barrel and piston rod, and wherein cylinder barrel is fixed with upper bolt support
Connection, one end of piston rod is across upper bolt support is flexibly connected with cylinder barrel, the other end is fixedly connected with underthrust pin bearing.
The force transmission mechanism 8 is connected between horizontally-supported platform and guide rail, and idler wheel 9 is slidably connected with guide rail 3.
It is equipped with one group of purlin 7 along foundation pit short transverse parallel interval between the guide rail 3 and foundation pit enclosure structure 5, it is described
Purlin along foundation pit enclosure structure 5 the elongated setting of length direction.
A kind of assembling constructing method of subway foundation pit assembled horizontal struts system as mentioned, which is characterized in that specific
Steps are as follows:
Horizontally-supported platform 1, force transferring structure 8 are assembled into integrated support unit by step 1.
Step 2, by the support unit assembled hang at 1 position of designed elevation as first layer support unit.
Step 3, the accurate plan-position for adjusting first layer support unit and verticality.
Step 4 jacks the jack in force transferring structure 8, pushes up idler wheel tightly and is faced on foundation pit enclosure structure 5 admittedly
When connect, and lateral earth pressure outside foundation pit is reached on horizontally-supported platform by force transmission mechanism.
Step 5 is excavated at the first layer soil body to 2 position of designed elevation.
Step 6, by another support unit integrally hang at 1 position of designed elevation as second layer support unit.
Step 7 is accurate to adjust second layer support unit plan-position and verticality.
Step 8 jacks the jack in force transferring structure 8, pushes up idler wheel tightly solid on foundation pit enclosure structure 5.
Step 9 shrinks the jack 10 of first layer support unit force transmission mechanism, using idler wheel along foundation pit enclosure structure 5
It walks, carry out the vertically movable of horizontally-supported platform, first layer support unit is dropped at 2 position of designed elevation.
Step 10 excavates the second layer soil body 13.
Step 11 repeats step 6 to step 10, until completing the earth excavation construction of foundation pit.
Claims (10)
1. a kind of subway foundation pit assembled horizontal struts system, including the level being horizontally supported between foundation pit enclosure structure (5)
Support platform (1), the horizontally-supported platform (1) are uniformly distributed along the length and short transverse parallel interval of foundation pit, special
Sign is: being connected with force transmission mechanism (8), the force transmission mechanism between the horizontally-supported platform (1) and foundation pit enclosure structure (5)
(8) it is evenly spaced on along the side of horizontally-supported platform；
The force transmission mechanism (8) includes the jack (10) for being connected to horizontally-supported platform (1) end, is connected to jack front end
Cradle head (11), the rolling wheel support (12) being hinged on cradle head (11) and the idler wheel being hinged on rolling wheel support (12)
(9)；
The rolling wheel support (12) is that triangular plate either bends strip board at an acute angle, and apex angle and cradle head (11) are cut with scissors
It connects, two base angles are symmetrically hinged with an idler wheel (9)；
The end of the jack (10) is connect by connecting plate with horizontally-supported platform (1).
2. subway foundation pit assembled horizontal struts system according to claim 1, it is characterised in that: the subway foundation pit dress
It further include guide rail (3) and lifting drive unit (2) with formula horizontal struts system.
3. subway foundation pit assembled horizontal struts system according to claim 2, it is characterised in that:
The guide rail (3) is arranged along the length direction parallel interval of foundation pit enclosure structure (5)；The guide rail 3 is by rail unit
It is vertically spliced along the short transverse of foundation pit enclosure structure (5).
4. subway foundation pit assembled horizontal struts system according to claim 3, it is characterised in that: the lifting drive list
First (2) are connect by unit rack (6) with horizontally-supported platform (1).
5. subway foundation pit assembled horizontal struts system according to claim 4, it is characterised in that: the unit rack
(6) include be connected to horizontally-supported platform (1) end A-frame, be connected to A-frame end upper bolt support and
The underthrust pin bearing being arranged in parallel in below bolt support.
6. subway foundation pit assembled horizontal struts system according to claim 5, it is characterised in that: the upper bolt support
It is detachably connected respectively by the counter-force hole of upper bolt and lower bolt and guide rail with underthrust pin bearing.
7. subway foundation pit assembled horizontal struts system according to claim 6, it is characterised in that: the lifting drive list
First (2) are hydraulic cylinder, including cylinder barrel and piston rod, and wherein cylinder barrel is fixedly connected with upper bolt support, and one end of piston rod is worn
Cross that bolt support is flexibly connected with cylinder barrel, the other end is fixedly connected with underthrust pin bearing.
8. subway foundation pit assembled horizontal struts system according to claim 7, it is characterised in that: the force transmission mechanism
(8) it is connected between horizontally-supported platform and guide rail, idler wheel (9) is slidably connected with guide rail (3).
9. subway foundation pit assembled horizontal struts system according to claim 8, it is characterised in that: the guide rail (3) with
It is equipped with one group of purlin (7) along foundation pit short transverse parallel interval between foundation pit enclosure structure (5), the purlin is along foundation pit enclosure
The elongated setting of length direction of structure (5).
10. a kind of assembly construction party of subway foundation pit assembled horizontal struts system as claimed in any one of claims 1 to 9
Method, which is characterized in that specific step is as follows:
Horizontally-supported platform (1), force transferring structure (8) are assembled into integrated support unit by step 1；
Step 2, by the support unit assembled hang at 1 position of designed elevation as first layer support unit；
Step 3, the accurate plan-position for adjusting first layer support unit and verticality；
Step 4 jacks the jack in force transferring structure (8), pushes up idler wheel tightly solid on foundation pit enclosure structure (5)；
Step 5 is excavated at the first layer soil body to 2 position of designed elevation；
Step 6, by another support unit integrally hang at 1 position of designed elevation as second layer support unit；
Step 7 is accurate to adjust second layer support unit plan-position and verticality；
Step 8 jacks the jack in force transferring structure (8), pushes up idler wheel tightly solid on foundation pit enclosure structure (5)；
Step 9 shrinks the jack (10) of first layer support unit force transmission mechanism, using idler wheel along foundation pit enclosure structure (5)
Walking drops to first layer support unit at 2 position of designed elevation；
Step 10 is excavated the second layer soil body (13)；
Step 11 repeats step 6 to step 10, until completing the earth excavation construction of foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610812925.5A CN106193053B (en) | 2016-09-09 | 2016-09-09 | A kind of subway foundation pit assembled horizontal struts system and its assembling constructing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610812925.5A CN106193053B (en) | 2016-09-09 | 2016-09-09 | A kind of subway foundation pit assembled horizontal struts system and its assembling constructing method |
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| Publication Number | Publication Date |
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| CN106193053A CN106193053A (en) | 2016-12-07 |
| CN106193053B true CN106193053B (en) | 2019-01-08 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000328572A (en) * | 1999-05-17 | 2000-11-28 | Teito Rapid Transit Authority | Temporary earth retaining timbering method in underground continuous wall |
| CN101294389A (en) * | 2008-02-22 | 2008-10-29 | 中建国际建设有限公司 | Steel shotcrete support internal force self-compensation, displacement control system and control method |
| CN100591862C (en) * | 2008-10-17 | 2010-02-24 | 上海隧道工程股份有限公司 | Pit construction method adopting prefabricated support |
| CN201546174U (en) * | 2009-10-27 | 2010-08-11 | 中国第一冶金建设有限责任公司 | Overall floor steel pipe column bracket movement device for bridge side bay closure segment construction |
| CN204475349U (en) * | 2014-12-17 | 2015-07-15 | 厦门科思泰建筑科技有限公司 | Modular support device |
| CN206128079U (en) * | 2016-09-09 | 2017-04-26 | 中建三局集团有限公司 | Subway foundation pit assembled horizontal support system |
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| CN106193053A (en) | 2016-12-07 |
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