CN106193055A - A kind of subway foundation pit liftable support system and lifting construction method thereof - Google Patents
A kind of subway foundation pit liftable support system and lifting construction method thereof Download PDFInfo
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- CN106193055A CN106193055A CN201610813052.XA CN201610813052A CN106193055A CN 106193055 A CN106193055 A CN 106193055A CN 201610813052 A CN201610813052 A CN 201610813052A CN 106193055 A CN106193055 A CN 106193055A
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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
A kind of subway foundation pit liftable support system and lifting construction method thereof, this system includes the level support unit being horizontally supported between foundation pit enclosure structure, level support unit is uniformly distributed along length and the short transverse parallel interval of foundation ditch, level support unit includes horizontal support platform and the lifting drive unit at the two ends being connected to horizontal support platform, lifting drive unit is connected with foundation pit enclosure structure by guide rail, and its middle guide is arranged along the length direction parallel interval of foundation pit enclosure structure.The present invention is in work progress, the corresponding soil body of stage excavation, level support unit is dropped to next designed elevation by lifting power plant by recycling guide rail, the most by that analogy, construct to bottom, be provided that large-scale work surface supplies backacter machine operation space, and utilize lifting drive unit matching guide rail to complete the lifting of level support unit, the concrete more more conventional than installation or steel pipe inner supporting are more efficient, and safety coefficient is more preferable, structure is more stable.
Description
Technical field
The present invention relates to building engineering field, particularly a kind of subway foundation pit construction system and construction method thereof.
Background technology
The main support system used currently for subway foundation pit is mainly armored concrete and steel pipe to support, particularly
Steel pipe support therein, it is horizontally disposed with spacing often less than 3m.Flat shape long and narrow based on subway station, rectangle is special
Point, subway foundation pit earth excavation typically uses step to move back and digs the method for relay and carry out.The spacing mistake arranged due to horizontal support
In closely, operation side is little, and earth excavation machinery often uses the less excavating equipment of dipper capacity, by the way of step relay
Complete earth excavation, greatly reduce earth excavation work efficiency；On the other hand, when steel pipe support lifts by root, because relatively
Close horizontal support spacing, it is necessary to avoid the mutual collision supported during lifting, lift in place after still need and be supported end welding
Fix and support pre-stress construction, supporting installation difficulty, efficiency of construction underground.
It is known that the principle that pit earthwork excavation must comply with " first support and dig afterwards " is carried out, found by investigation, even if adopting
The digging machine less by the relatively low dipper capacity of work efficiency carries out earth excavation, increases especially with foundation depth, the installation efficiency of support
Both the most all cannot be real can not to meet the most far away earth excavation requirement, earth excavation and support installation
The most satisfied, cause horizontal support to be installed and often lag behind earth excavation, bury huge potential safety hazard for base pit engineering.
To sum up, for the subway foundation pit engineering of current sleeve configuration rule, existing horizontal struts system and the earthwork is used to open
Excavation method, all causes certain difficulty on duration and safety to engineering construction.
Summary of the invention
It is an object of the invention to provide a kind of subway foundation pit liftable support system and lifting construction method, base to be solved
The technical problem that hole horizontal support cannot mutually meet over time and space with earth excavation；And solve constructional difficulties, efficiency
Problem low, that there is potential safety hazard.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of subway foundation pit liftable support system, including the level support unit being horizontally supported between foundation pit enclosure structure,
Described level support unit is uniformly distributed along length and the short transverse parallel interval of foundation ditch, and described level support unit includes
Horizontal support platform and be connected to the lifting drive unit at two ends of horizontal support platform, described lifting drive unit passes through guide rail
Being connected with foundation pit enclosure structure, its middle guide is arranged along the length direction parallel interval of foundation pit enclosure structure.
Described guide rail is vertically to be spliced along the short transverse of foundation pit enclosure structure by rail unit, is used for undertaking water
The vertical force that flat support unit and load thereof are collectively forming, has identical end absolute altitude between each rail unit and top mark is high, and
And can load level support unit and whole affiliated facility thereof with the rail unit of absolute altitude and the adjustable seats assembly of correspondence thereof
The weight of equipment.
Described rail unit is connected with foundation pit enclosure structure, by unit rack and lifting drive by adjustable seats assembly
Unit connects.
Described rail unit is rectangle column casing, and adjacent rail unit is connected by connecting pin.
One end of rail unit is provided with and is correspondingly provided with is connected connecting pin with guide rail connecting hole, the other end through connecting pin
Connect otic placode.
The stack shell back side of rail unit is provided with the guide rail bearing connecting hole connecting adjustable seats assembly, side along its length, side
To being provided with one group of counter-force hole connecting unit rack, the height in described counter-force hole and width are respectively greater than upper latch and lower latch
Big height and width dimensions.
Described adjustable seats assembly include foundation ditch bearing that the guide rail bearing being connected with guide rail is connected with guide rail bearing and
Connect the anchor slab between foundation ditch bearing and foundation pit enclosure structure, for guide rail is fixedly installed in foundation pit enclosure structure, and
There are three axle scalable degree of freedom, wherein the length direction of foundation ditch be X-axis, width be Y-axis, short transverse be Z axis, regulation
Hole is slotted hole.
The box like structure that described guide rail bearing is made up of backboard, base plate and biside plate, its dorsulum uniformly has X to
Adjustment hole is also connected with guide rail by securing member, has regulatory function in X-axis, base plate has Y-direction adjustment hole and by tight
Firmware is connected with foundation ditch bearing, has regulatory function in Y-axis.
The box like structure that described foundation ditch bearing is made up of backboard, base plate and biside plate, wherein base plate by securing member with
The base plate of guide rail bearing connects, on have the through hole through securing member, backboard uniformly has Z-direction adjustment hole and passes through anchor
It is connected with anchor slab, Z axis has regulatory function.
Described anchor slab is anchored in foundation pit enclosure structure beforehand through anchor before being arranged on foundation ditch bearing；The one of described anchor
The thread head of end, sequentially passing through anchor slab and Z-direction adjustment hole and fixed by nut, the other end is hook heads, be anchored at foundation ditch encloses
On the framework of steel reinforcement of protection structure.
Described unit rack includes being connected to the A-frame of horizontal support platform end, being connected to A-frame end
Upper latch bearing and be set in parallel in the lower latch bearing below latch bearing.
Described upper latch bearing and lower latch bearing are detachable with the counter-force hole of guide rail by upper latch and lower latch respectively
Connect.
Described lifting drive unit is hydraulic jack, and including cylinder barrel and piston rod, wherein cylinder barrel is fixed with upper latch bearing
Connecting, one end of piston rod is flexibly connected through upper latch bearing with cylinder barrel, the other end is fixing with lower latch bearing is connected.
Described horizontal support platform is space truss or the space truss enclosed by space truss.
Described horizontal support platform be respectively arranged at the two ends with least one set lifting drive unit and guide rail.
Be provided with one group along foundation ditch short transverse parallel interval between described guide rail and foundation pit enclosure structure and enclose purlin, described in enclose purlin
The elongated setting of length direction along foundation pit enclosure structure.
The lifting construction method of a kind of liftable support system of subway foundation pit as mentioned, specifically comprises the following steps that
Step one, completes the construction of foundation pit enclosure structure, carries out ground floor earth excavation.
Step 2, after being excavated to supported design absolute altitude, installs rail unit and the adjustable seats assembly of correspondence, and connects
Ground floor horizontal support platform and the lifting drive unit of correspondence and unit rack.
Step 3, along with the excavation of foundation pit degree of depth increases, continues to install downwards rail unit and the adjustable seats group of correspondence
Part, wherein uses connecting pin to be connected between rail unit with rail unit.
Step 4, after excavation to next layer of supported design absolute altitude, newly-increased second layer horizontal support platform and the liter of correspondence
Fall power unit and unit rack.
Step 5, after the second layer horizontal support platform support replacement that ground floor horizontal support platform is increased newly by top, is carried out
The substep batch (-type) segmentation of ground floor horizontal support platform declines, and specifically comprises the following steps that
Step 1, the piston rod of all hydraulic oil cylinder reclaims until after lower latch is not subject to vertical force, lower latch being exited counter-force
Hole.
Step 2, all of piston rod stretches out until the corresponding corresponding counter-force hole of lower latch bearing, lower latch is inserted correspondence
Counter-force hole in.
Step 3, inserts all of lower latch behind counter-force hole, and all of piston rod synchronizes elongation, all of lower latch with
Contact and stress bottom counter-force hole, until after all of upper latch is not subject to vertical force, exiting all of upper latch from counter-force
Hole.
Step 4, all of piston rod synchronizes to reclaim, and ground floor horizontal support platform declines one section of height, until on all
Upper latch just to the counter-force hole specified, is inserted in corresponding counter-force hole by latch bearing.
Step 5, after all of upper latch inserts counter-force hole, all of piston rod synchronizes to reclaim, and all of upper latch is with anti-
Contact stress bottom power hole, during until all of lower latch is not subject to vertical force, piston rod stops, and so far completes under single step
Fall.
Step 6, repetition step 1 is to step 5, until ground floor horizontal support platform drops to designed elevation position.
Step 6, adjusts all of piston rod extension elongation and pressure so that all of upper latch, lower latch are divided equally vertically
Load, the then all of hydraulic jack of choke-out, make horizontal support platform be positioned at specified altitude assignment.
Step 7, repeats step 3 to step 6 until ground floor horizontal support platform arrives bottom supported design absolute altitude
After, start bottom structure construction.
After fabric reaches requirement of strength, start to remove support system, specifically comprise the following steps that
Step one, bottom horizontal support platform proceeds by substep batch (-type) stepped climb, specifically comprises the following steps that
Step 1, the piston rod elongation of all hydraulic oil cylinder is until after upper latch is not subject to vertical force, exiting upper latch from counter-force
Hole.
Step 2, all of piston rod stretches out until the corresponding corresponding counter-force hole of upper latch bearing, upper latch is inserted correspondence
Counter-force hole in.
Step 3, inserts all of upper latch behind counter-force hole, and all of piston rod synchronizes to reclaim, all of upper latch with
Contact and stress bottom counter-force hole, until after all of lower latch is not subject to vertical force, exiting all of lower latch from counter-force
Hole.
Step 4, all of piston rod synchronizes to reclaim, and ground floor horizontal support platform 1 climbs one section of height, until under all
Lower latch just to the counter-force hole specified, is inserted in corresponding counter-force hole by latch bearing.
Step 5, after all of lower latch inserts counter-force hole, all of piston rod synchronizes elongation, and all of lower latch is with anti-
Contact stress bottom power hole, during until all of upper latch is not subject to vertical force, piston rod stops, and so far completes under single step
Fall.
Step 6, repetition step 1 is to step 5, until ground floor horizontal support platform lifting is to designed elevation position.
Step 2, after bottom horizontal support platform reaches last layer supported design absolute altitude, adjusts all of piston rod and stretches out
Length and pressure so that vertical load divided equally by all of upper latch, lower latch, and then all of hydraulic jack of choke-out, makes level
Support platform is positioned at specified altitude assignment.
Step 3, removes the rail unit of the bottom, and carries out removing turnover to corresponding adjustable seats assembly.
Step 4, along with structure is upwards constructed, bottom horizontal support platform repetition step one is to step 3, until bottom water
Flat support platform rises to top layer supported design absolute altitude, then removes.
Compared with prior art the invention have the characteristics that and beneficial effect:
Present invention subway foundation pit different from the past is constructed, but by the rectangle rule subway foundation pit of sleeve configuration is divided into some
Unit, each unit is by arranging level support unit, on the premise of meeting subway foundation pit stability and Deformation control requirement,
There is assembled, large span, liftable feature so that subway foundation pit working space is big, and efficiency of construction is higher, for subway
Foundation pit construction field proposes a kind of new support system and construction method, is low-carbon (LC), green, quick, safe construction technology, both
Earth excavation work efficiency can be accelerated, shorten the engineering construction duration, simultaneously by the integral elevating of level support unit, it is to avoid traditionally
Iron-based hole can not be followed because of cruelty construction and first be supportted the deep pit monitor hidden danger that the principle dug afterwards causes.
Being fixedly installed on foundation pit enclosure structure by guide rail by adjustable seats assembly, wherein the length direction of foundation ditch is X
Axle, width be Y-axis, short transverse be Z axis, adjustment hole is slotted hole, the adjustment hole in three directions with the use of, it is achieved
The regulation of three axle degree of freedom, it is ensured that guide rail locus regulation during installation, thus ensure that installation matter
Amount, it is ensured that the entirety of later stage horizontal support platform is climbed and declined the reliability of construction, it is to avoid horizontal support platform two ends stress is not
The safety problem all produced.
In work progress, level support unit being first arranged on ground floor designed elevation, then stage excavation is the most native
Body, level support unit is dropped to second layer designed elevation, again stage excavation by lifting power plant by recycling guide rail
The corresponding soil body, the most by that analogy, has constructed to bottom, has used this support system meeting subway foundation pit stability and change
While shape controls to require, also there is the feature of large span, be provided that large-scale work surface supplies backacter machine operation space, and
And utilizing lifting drive unit matching guide rail to complete the lifting of level support unit, ratio is installed in more conventional concrete or steel pipe
Support more efficient, and safety coefficient is more preferable, structure is more stable.
Accompanying drawing explanation
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the plan structure schematic diagram of the present invention.
Fig. 3 is the side-looking structural representation of the present invention.
Fig. 4 is the partial structurtes schematic diagram of the present invention.
Fig. 5 is the adjustable seats modular construction schematic diagram of the present invention.
Fig. 6 is the adjustable seats modular construction schematic diagram of the present invention.
Reference: 1-horizontal support platform, 2-lifting drive unit, 3-guide rail, 3.1-rail unit, 3.2-are anti-
Power hole, 3.3-connecting pin, 3.4-guide rail connecting hole, 3.5-connect otic placode, 4-adjustable seats assembly, 4.1-guide rail bearing, 4.2-
X is tight to adjustment hole, 4.4-foundation ditch bearing, 4.5-Z-direction adjustment hole, 4.6-anchor slab, 4.7-anchor, 4.8-to adjustment hole, 4.3-Y
Firmware, 5-foundation pit enclosure structure, 5.1-framework of steel reinforcement, 6-unit rack, 6.1-A-frame, 6.2-upper latch bearing,
Under the upper latch of 6.3-, 6.4-, under latch bearing, 6.5-, latch, 7-enclose purlin.
Detailed description of the invention
Embodiment is shown in Figure 1, this subway foundation pit liftable support system, including being horizontally supported at foundation pit enclosure knot
Level support unit between structure 5, described level support unit uniformly divides along length and the short transverse parallel interval of foundation ditch
Cloth, described level support unit includes horizontal support platform 1 and the lifting drive unit at the two ends being connected to horizontal support platform 1
2, described lifting drive unit 2 is connected with foundation pit enclosure structure 5 by guide rail 3, and its middle guide 3 is along the length of foundation pit enclosure structure 5
Degree direction parallel interval is arranged；Described guide rail 3 is vertically to be spliced along the short transverse of foundation pit enclosure structure 5 by rail unit 3.1
?；Be provided with one group along foundation ditch short transverse parallel interval between described guide rail 3 and foundation pit enclosure structure 5 and enclose purlin 7, described in enclose
Purlin is along the elongated setting of length direction of foundation pit enclosure structure 5.
Shown in Figure 2, described rail unit 3.1 is connected with foundation pit enclosure structure 5 by adjustable seats assembly 4, passes through
Unit rack 6 is connected with lifting drive unit 2.
Seeing shown in Fig. 3, Fig. 4, described rail unit 3.1 is rectangle column casing, and adjacent rail unit 3.1 passes through connecting pin
3.3 connect；One end of rail unit 3.1 is provided with and is correspondingly provided with even with guide rail connecting hole 3.4, the other end through connecting pin 3.3
The connection otic placode 3.5 of pin 3.3 in succession；The stack shell back side of rail unit 3.1 is provided with the guide rail bearing connecting adjustable seats assembly 4
Connecting hole, side is provided with one group of counter-force hole 3.2 connecting unit rack 6 along its length.
Seeing shown in Fig. 5, Fig. 6, described adjustable seats assembly 4 includes guide rail bearing 4.1 and the guide rail being connected with guide rail 3
Anchor slab 4.6 between foundation ditch bearing 4.4 and connection foundation ditch bearing 4.4 and foundation pit enclosure structure 5 that bearing 4.1 connects；Described
The box like structure that guide rail bearing 4.1 is made up of backboard, base plate and biside plate, its dorsulum uniformly has X to adjustment hole
4.2 and be connected with guide rail 3 by securing member, base plate has Y-direction adjustment hole 4.3 and by securing member and foundation ditch bearing 4.4 company
Connect；The box like structure that described foundation ditch bearing 4.4 is made up of backboard, base plate and biside plate, wherein base plate passes through securing member and leads
The base plate of rail bearing connects, on have the through hole through securing member, backboard uniformly has Z-direction adjustment hole 4.5 and passes through anchor
4.7 are connected with anchor slab 4.6；The thread head of one end of described anchor 4.7, sequentially pass through anchor slab 4.6 and Z-direction adjustment hole 4.5 and lead to
Crossing nut to fix, the other end is hook heads, is anchored on the framework of steel reinforcement 5.1 of foundation pit enclosure structure 5.
Shown in Figure 4, described unit rack 6 includes being connected to the A-frame 6.1 of horizontal support platform 1 end, connecting
It is connected on the upper latch bearing 6.2 of A-frame 6.1 end and is set in parallel in the lower latch bearing below latch bearing 6.2
6.4；Described upper latch bearing 6.2 and lower latch bearing 6.4 are respectively by upper latch 6.3 and lower latch 6.5 and the counter-force of guide rail 3
Hole 3.2 connects.
Shown in Figure 4, described lifting drive unit 2 is hydraulic jack, and including cylinder barrel and piston rod, wherein cylinder barrel is with upper
Latch bearing 6.2 is fixing to be connected, and one end of piston rod is flexibly connected through upper latch bearing 6.2 with cylinder barrel, the other end is inserted with lower
Pin bearing 6.4 is fixing to be connected.
Described horizontal support platform 1 is space truss or the space truss enclosed by space truss；Work as horizontal support
When platform 1 is space truss, the two ends of horizontal support platform 1 respectively connect a set of lifting drive unit 2 and guide rail 3, work as water
When flat support platform 1 is the space truss enclosed by space truss, at least need three set lifting drive unit 2 and guide rails 3, ginseng
See that in Fig. 2, this example, there are two set lifting drive unit 2 and guide rails 3 two ends of horizontal support platform 1 each corresponding connection.
The lifting construction method of a kind of described subway foundation pit liftable support system, does not consider that the earthwork of unit both sides is interfered
And soil pressure, specifically comprise the following steps that
Step one, completes the construction of foundation pit enclosure structure 5, carries out ground floor earth excavation.
Step 2, after being excavated to supported design absolute altitude, installs adjustable with absolute altitude rail unit and correspondence of at least one of which
Mounting assembly 4, and connect ground floor horizontal support platform 1 and the lifting drive unit 2 of correspondence and unit rack 6, all of
Piston rod is in recovery state, all upper latches, lower latch the most reliably insert correspondence counter-force hole in and all bear vertical force.
Step 3, along with the excavation of foundation pit degree of depth increases, continues to install downwards rail unit and the adjustable seats group of correspondence
Part 4, wherein uses connecting pin 3.3 to be connected, the wherein connection otic placode 3.6 of a rail unit between rail unit with rail unit
Inserting the bottom of upper strata rail unit, corresponding guide rail connecting hole 3.4, the connection otic placode 3.6 of passing of connecting pin 3.3 is by adjacent rails list
Unit connects.
Step 4, after excavation to next layer of supported design absolute altitude, newly-increased second layer horizontal support platform 1 and the liter of correspondence
Fall power unit 2 and unit rack 6.
Step 5, after second layer horizontal support platform 1 support replacement that ground floor horizontal support platform 1 is increased newly by top, enters
The substep batch (-type) segmentation of row ground floor horizontal support platform 1 declines, and specifically comprises the following steps that
Step 1, the piston rod of all hydraulic oil cylinder reclaims until after lower latch is not subject to vertical force, being exited instead by lower latch 6.5
Power hole.
Step 2, all of piston rod stretches out until the corresponding corresponding counter-force hole of lower latch bearing 6.4, is inserted by lower latch
In corresponding counter-force hole: during installation, absolute altitude at the bottom of absolute altitude a little higher than counter-force hole at the bottom of lower latch, it is ensured that lower latch unhinderedly inserts
Corresponding counter-force hole.
Step 3, inserts all of lower latch behind counter-force hole, and all of piston rod synchronizes elongation, all of lower latch with
Contact and stress bottom counter-force hole, until after all of upper latch is not subject to vertical force, exiting all of upper latch from counter-force
Hole.
Step 4, all of piston rod synchronizes to reclaim, and ground floor horizontal support platform 1 declines one section of height, until on all
Upper latch just to the counter-force hole specified, is inserted in corresponding counter-force hole: during installation, at the bottom of upper latch, absolute altitude is slightly by latch bearing 6.2
Higher than absolute altitude at the bottom of counter-force hole, it is ensured that upper latch unhinderedly inserts corresponding counter-force hole.
Step 5, after all of upper latch inserts counter-force hole, all of piston rod synchronizes to reclaim, and all of upper latch is with anti-
Contact stress bottom power hole, during until all of lower latch is not subject to vertical force, piston rod stops, and so far completes under single step
Fall.
Step 6, repetition step 1 is to step 5, until ground floor horizontal support platform 1 drops to designed elevation position.
Step 6, adjusts all of piston rod extension elongation and pressure so that all of upper latch, lower latch are divided equally vertically
Load, the then all of hydraulic jack of choke-out, make horizontal support platform 1 be positioned at specified altitude assignment.
Step 7, repeats step 3 to step 6 until ground floor horizontal support platform 1 arrives bottom supported design mark
Gao Hou, starts bottom structure construction.
After fabric reaches requirement of strength, start to remove support system, specifically comprise the following steps that
Step one, bottom horizontal support platform 1 proceeds by substep batch (-type) stepped climb, specifically comprises the following steps that
Step 1, the piston rod elongation of all hydraulic oil cylinder is until after upper latch is not subject to vertical force, exiting upper latch from counter-force
Hole.
Step 2, all of piston rod stretches out until the corresponding corresponding counter-force hole of upper latch bearing, upper latch is inserted correspondence
Counter-force hole in: during installation, absolute altitude at the bottom of a little higher than counter-force of absolute altitude at the bottom of upper latch hole, it is ensured that upper latch unhinderedly inserts correspondence
Counter-force hole.
Step 3, inserts all of upper latch behind counter-force hole, and all of piston rod synchronizes to reclaim, all of upper latch with
Contact and stress bottom counter-force hole, until after all of lower latch is not subject to vertical force, exiting all of lower latch from counter-force
Hole.
Step 4, all of piston rod synchronizes to reclaim, and ground floor horizontal support platform 1 climbs one section of height, until under all
Lower latch just to the counter-force hole specified, is inserted in corresponding counter-force hole: during installation, absolute altitude at the bottom of lower latch is a little higher than by latch bearing
Absolute altitude at the bottom of counter-force hole, it is ensured that lower latch unhinderedly inserts corresponding counter-force hole.
Step 5, after all of lower latch inserts counter-force hole, all of piston rod synchronizes elongation, and all of lower latch is with anti-
Contact stress bottom power hole, during until all of upper latch is not subject to vertical force, piston rod stops, and so far completes under single step
Fall.
Step 6, repetition step 1 is to step 5, until ground floor horizontal support platform 1 rises to designed elevation position.
Step 2, after bottom horizontal support platform 1 reaches last layer supported design absolute altitude, adjusts all of piston rod and stretches out
Length and pressure so that vertical load divided equally by all of upper latch, lower latch, and then all of hydraulic jack of choke-out, makes level
Support platform 1 is positioned at specified altitude assignment.
Step 3, removes the rail unit of the bottom, and carries out removing turnover to corresponding adjustable seats assembly.
Step 4, along with structure is upwards constructed, bottom horizontal support platform 1 repeats step one to step 3, until bottom
Horizontal support platform 1 rises to top layer supported design absolute altitude, then removes.
Claims (10)
1. a subway foundation pit liftable support system, including the horizontal support being horizontally supported between foundation pit enclosure structure (5)
Unit, described level support unit is uniformly distributed along length and the short transverse parallel interval of foundation ditch, it is characterised in that: described
Level support unit includes horizontal support platform (1) and is connected to the lifting drive unit at two ends of horizontal support platform (1)
(2), described lifting drive unit (2) is connected with foundation pit enclosure structure (5) by guide rail (3), and its middle guide (3) is along foundation pit enclosure
The length direction parallel interval of structure (5) is arranged；
Described guide rail (3) is vertically to be spliced along the short transverse of foundation pit enclosure structure (5) by rail unit (3.1).
Subway foundation pit liftable support system the most according to claim 1, it is characterised in that: described rail unit (3.1)
It is connected with foundation pit enclosure structure (5) by adjustable seats assembly (4), by unit rack (6) with lifting drive unit (2) even
Connect.
Subway foundation pit liftable support system the most according to claim 2, it is characterised in that: described rail unit (3.1)
For rectangle column casing, adjacent rail unit (3.1) is connected by connecting pin (3.3)；
One end of rail unit (3.1) is provided with and is correspondingly provided with guide rail connecting hole (3.4), the other end through connecting pin (3.3)
Connect the connection otic placode (3.5) of connecting pin (3.3)；
The stack shell back side of rail unit (3.1) is provided with the guide rail bearing connecting hole connecting adjustable seats assembly (4), and side is long along it
Degree direction is provided with one group of counter-force hole (3.2) connecting unit rack (6).
Subway foundation pit liftable support system the most according to claim 2, it is characterised in that: described adjustable seats assembly
(4) foundation ditch bearing (4.4) that the guide rail bearing (4.1) being connected with guide rail (3) is connected and even is included with guide rail bearing (4.1)
Connect the anchor slab (4.6) between foundation ditch bearing (4.4) and foundation pit enclosure structure (5)；
The box like structure that described guide rail bearing (4.1) is made up of backboard, base plate and biside plate, its dorsulum uniformly has X
It is connected with guide rail (3) to adjustment hole (4.2) and by securing member, base plate has Y-direction adjustment hole (4.3) and passes through securing member
It is connected with foundation ditch bearing (4.4)；
The box like structure that described foundation ditch bearing (4.4) is made up of backboard, base plate and biside plate, wherein base plate by securing member with
The base plate of guide rail bearing connects, on have the through hole through securing member, backboard uniformly has Z-direction adjustment hole (4.5) and passes through
Anchor (4.7) is connected with anchor slab (4.6)；
The thread head of one end of described anchor (4.7), sequentially pass through anchor slab (4.6) and Z-direction adjustment hole (4.5) solid by nut
Fixed, the other end is hook heads, is anchored on the framework of steel reinforcement of foundation pit enclosure structure (5) (5.1).
Subway foundation pit liftable support system the most according to claim 2, it is characterised in that: described unit rack (6) wraps
The upper latch include the A-frame (6.1) being connected to horizontal support platform (1) end, being connected to A-frame (6.1) end props up
Seat (6.2) and be set in parallel in latch bearing (6.2) lower section lower latch bearing (6.4)；
Described upper latch bearing (6.2) and lower latch bearing (6.4) respectively by upper latch (6.3) and lower latch (6.5) with lead
The counter-force hole (3.2) of rail (3) removably connects.
Subway foundation pit liftable support system the most according to claim 5, it is characterised in that: described lifting drive unit
(2) being hydraulic jack, including cylinder barrel and piston rod, wherein cylinder barrel is fixing with upper latch bearing (6.2) is connected, one end of piston rod
Be flexibly connected through upper latch bearing (6.2) with cylinder barrel, the other end is fixed with lower latch bearing (6.4) and is connected.
Subway foundation pit liftable support system the most according to claim 1, it is characterised in that: described horizontal support platform
(1) it is space truss or the space truss enclosed by space truss；
Described horizontal support platform (1) be respectively arranged at the two ends with least one set lifting drive unit (2) and guide rail (3).
Subway foundation pit liftable support system the most according to claim 1, it is characterised in that: described guide rail (3) and foundation ditch
Be provided with one group along foundation ditch short transverse parallel interval between building enclosure (5) and enclose purlin, described in enclose purlin along foundation pit enclosure structure (5)
The elongated setting of length direction.
9. the lifting construction method of a subway foundation pit liftable support system as claimed in claim 3, it is characterised in that tool
Body step is as follows:
Step one, completes the construction of foundation pit enclosure structure (5), carries out ground floor earth excavation；
Step 2, after being excavated to supported design absolute altitude, installs rail unit and the adjustable seats assembly (4) of correspondence, and connects
The lifting drive unit (2) of ground floor horizontal support platform (1) and correspondence and unit rack (6)；
Step 3, along with the excavation of foundation pit degree of depth increases, continues to install downwards rail unit and the adjustable seats assembly of correspondence
(4), connecting pin (3.3) is wherein used to be connected between rail unit with rail unit；
Step 4, after excavation to next layer of supported design absolute altitude, newly-increased second layer horizontal support platform (1) and the lifting of correspondence
Power unit (2) and unit rack (6)；
Step 5, after second layer horizontal support platform (1) support replacement that ground floor horizontal support platform (1) is increased newly by top, enters
The substep batch (-type) segmentation of row ground floor horizontal support platform (1) declines, and specifically comprises the following steps that
Step 1, the piston rod of all hydraulic oil cylinder reclaims until after lower latch is not subject to vertical force, being exited by lower latch (6.5)
Counter-force hole；
Step 2, all of piston rod stretches out until the corresponding corresponding counter-force hole of lower latch bearing (6.4), and it is right to be inserted by lower latch
In the counter-force hole answered；
Step 3, after all of lower latch is inserted counter-force hole, all of piston rod synchronizes elongation, all of lower latch and counter-force
Contact and stress bottom hole, until after all of upper latch is not subject to vertical force, exiting all of upper latch from counter-force hole；
Step 4, all of piston rod synchronizes to reclaim, and ground floor horizontal support platform (1) declines one section of height, until all slotting
Upper latch just to the counter-force hole specified, is inserted in corresponding counter-force hole by pin bearing (6.2)；
Step 5, after all of upper latch inserts counter-force hole, all of piston rod synchronizes to reclaim, all of upper latch and counter-force hole
Bottom contact stress, during until all of lower latch is not subject to vertical force, piston rod stops, and so far completes single step and declines；
Step 6, repetition step 1 is to step 5, until ground floor horizontal support platform (1) drops to designed elevation position；
Step 6, adjusts all of piston rod extension elongation and pressure so that vertical lotus divided equally by all of upper latch, lower latch
Carry, the then all of hydraulic jack of choke-out, make horizontal support platform (1) be positioned at specified altitude assignment；
Step 7, repeats step 3 to step 6 until ground floor horizontal support platform (1) arrives bottom supported design absolute altitude
After, start bottom structure construction.
Lifting construction method the most according to claim 9, it is characterised in that: after fabric reaches requirement of strength, start
Remove support system, specifically comprise the following steps that
Step one, bottom horizontal support platform 1 proceeds by substep batch (-type) stepped climb, specifically comprises the following steps that
Step 1, the piston rod elongation of all hydraulic oil cylinder is until after upper latch is not subject to vertical force, exiting upper latch from counter-force
Hole；
Step 2, all of piston rod stretches out until the corresponding corresponding counter-force hole of upper latch bearing, upper latch is inserted the anti-of correspondence
In power hole；
Step 3, after all of upper latch is inserted counter-force hole, all of piston rod synchronizes to reclaim, all of upper latch and counter-force
Contact and stress bottom hole, until after all of lower latch is not subject to vertical force, exiting all of lower latch from counter-force hole；
Step 4, all of piston rod synchronizes to reclaim, and ground floor horizontal support platform (1) climbs one section of height, lower inserts until all
Lower latch just to the counter-force hole specified, is inserted in corresponding counter-force hole by pin bearing；
Step 5, after all of lower latch inserts counter-force hole, all of piston rod synchronizes elongation, all of lower latch and counter-force hole
Bottom contact stress, during until all of upper latch is not subject to vertical force, piston rod stops, and so far completes single step and declines；
Step 6, repetition step 1 is to step 5, until ground floor horizontal support platform (1) rises to designed elevation position；
Step 2, after bottom horizontal support platform (1) reaches last layer supported design absolute altitude, adjusts all of piston rod and stretches out length
Degree and pressure so that vertical load divided equally by all of upper latch, lower latch, then all of hydraulic jack of choke-out, makes level prop up
Support platform (1) is positioned at specified altitude assignment；
Step 3, removes the rail unit of the bottom, and carries out removing turnover to corresponding adjustable seats assembly；
Step 4, repeats step one to step 2, the last layer horizontal support platform that climbs to last layer supported design absolute altitude again, with
This analogizes, and along with structure is upwards constructed, until bottom horizontal support platform (1) rises to top layer supported design absolute altitude, then enters
Row lifting is removed.
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| CN201610813052.XA CN106193055B (en) | 2016-09-09 | 2016-09-09 | A kind of subway foundation pit liftable support system and its lifting construction method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059879A (en) * | 2017-03-09 | 2017-08-18 | 中国建筑第八工程局有限公司 | Bracing members and steel enclose the adaptability connecting node and its construction method of purlin in foundation ditch |
| CN110409459A (en) * | 2019-07-24 | 2019-11-05 | 陈日暖 | A kind of building lot hole suspension device convenient for adjusting |
| CN110820753A (en) * | 2019-11-12 | 2020-02-21 | 顾青林 | Hydraulic engineering construction excavation anti-collapse device |
| CN111206591A (en) * | 2019-12-18 | 2020-05-29 | 上海建工集团股份有限公司 | Assembled integral translation supporting system for pipe gallery foundation pit and construction method |
| CN113235618A (en) * | 2021-06-01 | 2021-08-10 | 中国建筑第八工程局有限公司 | Support system in slip type foundation pit and construction method thereof |
| CN115387586A (en) * | 2022-09-15 | 2022-11-25 | 中建八局天津建设工程有限公司 | Foundation pit reverse construction lifting platform and construction method |
| CN116122304A (en) * | 2023-03-16 | 2023-05-16 | 中国铁路广州局集团有限公司站房建设指挥部 | Deep foundation pit support changing device with adjustable supporting force |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418572A (en) * | 2008-10-17 | 2009-04-29 | 上海隧道工程股份有限公司 | Pit construction method employing precast support |
| JP2009221763A (en) * | 2008-03-17 | 2009-10-01 | Osakabe:Kk | Reinforcement assembling apparatus and reinforcement assembling method |
| CN103015705A (en) * | 2012-11-30 | 2013-04-03 | 柳雪春 | Self-leveling mechanism of oil cylinder support cross beam in slip form system |
| CN204530719U (en) * | 2015-03-17 | 2015-08-05 | 南京水务集团有限公司 | A kind of quick assembled type suspension device for Support of Foundation Pit Excavation |
| CN104895014A (en) * | 2015-05-28 | 2015-09-09 | 杭州江润科技有限公司 | Construction method of high altitude long span cast-in-place multi-arch aqueduct supporting die system |
| CN105714829A (en) * | 2016-02-29 | 2016-06-29 | 济南轨道交通集团有限公司 | Construction device for deep foundation pit excavation and underground station construction and construction method adopting same |
| CN206034460U (en) * | 2016-09-09 | 2017-03-22 | 中建三局集团有限公司 | Subway foundation pit liftable support system |
-
2016
- 2016-09-09 CN CN201610813052.XA patent/CN106193055B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009221763A (en) * | 2008-03-17 | 2009-10-01 | Osakabe:Kk | Reinforcement assembling apparatus and reinforcement assembling method |
| CN101418572A (en) * | 2008-10-17 | 2009-04-29 | 上海隧道工程股份有限公司 | Pit construction method employing precast support |
| CN103015705A (en) * | 2012-11-30 | 2013-04-03 | 柳雪春 | Self-leveling mechanism of oil cylinder support cross beam in slip form system |
| CN204530719U (en) * | 2015-03-17 | 2015-08-05 | 南京水务集团有限公司 | A kind of quick assembled type suspension device for Support of Foundation Pit Excavation |
| CN104895014A (en) * | 2015-05-28 | 2015-09-09 | 杭州江润科技有限公司 | Construction method of high altitude long span cast-in-place multi-arch aqueduct supporting die system |
| CN105714829A (en) * | 2016-02-29 | 2016-06-29 | 济南轨道交通集团有限公司 | Construction device for deep foundation pit excavation and underground station construction and construction method adopting same |
| CN206034460U (en) * | 2016-09-09 | 2017-03-22 | 中建三局集团有限公司 | Subway foundation pit liftable support system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107059879A (en) * | 2017-03-09 | 2017-08-18 | 中国建筑第八工程局有限公司 | Bracing members and steel enclose the adaptability connecting node and its construction method of purlin in foundation ditch |
| CN107059879B (en) * | 2017-03-09 | 2023-10-13 | 中国建筑第八工程局有限公司 | Adaptive connection node of steel support and steel purlin in foundation pit and construction method thereof |
| CN110409459A (en) * | 2019-07-24 | 2019-11-05 | 陈日暖 | A kind of building lot hole suspension device convenient for adjusting |
| CN110820753A (en) * | 2019-11-12 | 2020-02-21 | 顾青林 | Hydraulic engineering construction excavation anti-collapse device |
| CN110820753B (en) * | 2019-11-12 | 2021-02-09 | 顾青林 | Hydraulic engineering construction excavation anti-collapse device |
| CN111206591A (en) * | 2019-12-18 | 2020-05-29 | 上海建工集团股份有限公司 | Assembled integral translation supporting system for pipe gallery foundation pit and construction method |
| CN111206591B (en) * | 2019-12-18 | 2022-01-11 | 上海建工集团股份有限公司 | Assembled integral translation supporting system for pipe gallery foundation pit and construction method |
| CN113235618A (en) * | 2021-06-01 | 2021-08-10 | 中国建筑第八工程局有限公司 | Support system in slip type foundation pit and construction method thereof |
| CN115387586A (en) * | 2022-09-15 | 2022-11-25 | 中建八局天津建设工程有限公司 | Foundation pit reverse construction lifting platform and construction method |
| CN116122304A (en) * | 2023-03-16 | 2023-05-16 | 中国铁路广州局集团有限公司站房建设指挥部 | Deep foundation pit support changing device with adjustable supporting force |
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