CN106958188A - Arch foot support meanss and its construction method - Google Patents
Arch foot support meanss and its construction method Download PDFInfo
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- CN106958188A CN106958188A CN201710401193.5A CN201710401193A CN106958188A CN 106958188 A CN106958188 A CN 106958188A CN 201710401193 A CN201710401193 A CN 201710401193A CN 106958188 A CN106958188 A CN 106958188A
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- support
- supporting mechanism
- supported
- arch
- arch springing
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D6/00—Truss-type bridges
- E01D6/02—Truss-type bridges of bowstring type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a kind of Arch foot support meanss and its construction method.Wherein, the device includes：Support frame, the first supporting mechanism and the second supporting mechanism；Wherein, the bottom of support frame is connected with the cushion cap of arch springing to be supported；The lower boom of arch springing to be supported is connected by the first supporting mechanism with support frame；The top boom of arch springing to be supported is connected by the second supporting mechanism with support frame.The first supporting mechanism in the present invention is connected to the lower boom of arch springing to be supported, second supporting mechanism is connected to the top boom of arch springing to be supported, and, first supporting mechanism is connected with the second supporting mechanism with support frame, and then realize treat support arch springing carried out using the measure that rigidly fixes it is pre-buried, so that arch springing to be supported is when interting construction before civil engineering is poured, the angles and positions of arch springing to be supported are not subjected to displacement, deflection, it ensure that setting angle and the elements of a fix, the adjustment time of arch springing to be supported is also eliminated simultaneously, improves efficiency of construction.
Description
Technical field
The present invention relates to technical field of civil engineering, in particular to a kind of Arch foot support meanss and its construction
Method.
Background technology
Base-supporting inverted triangle Concrete Filled Steel-tube Truss Arch Bridge, arch rib section is in del, is made up of many steel pipe chord members.
Arch rib is consolidated in concrete saddle using flush type construction, and skewback uses reinforced concrete structure, interface from arch abutment it is trapezoidal to
The rectangle gradual change of beam-ends.Arch rib according to it is pre-buried with it is non-it is pre-buried be divided into 3 sections, the arch rib embedded section at arch rib two ends is referred to as arch springing, middle
Non- embedded section is referred to as interlude.Arch springing section be made up of two parts, a part need to nuzzle in advance skewback and with skewback steel knot it is cast-in-place, separately
A part passes through inner flange and interlude rigid connection outside skewback.Arch springing embedded section is general horizontal by certain angle, e.g., from about
35 °~45 °, according to sequence of construction, arch springing of typically first constructing can install interlude after concrete strength reaches design requirement
Arch rib.The setting angle and location dimension of arch springing have very big influence on the quality of bridge, therefore, and pair cross-section is in the arch of inverted triangle
The setting angle and location dimension of pin section require higher.
The content of the invention
In consideration of it, the present invention proposes a kind of Arch foot support meanss and its construction method, it is intended to which how solution improves
The problem of setting angle and location dimension of arch springing.
On one side, the present invention proposes a kind of Arch foot support meanss.The device includes：Support frame, the first support
Mechanism and the second supporting mechanism；Wherein, the bottom of support frame is connected with the cushion cap of arch springing to be supported；The lower edge of arch springing to be supported
Bar is connected by the first supporting mechanism with support frame；The top boom of arch springing to be supported passes through the second supporting mechanism and support frame phase
Connection.
Further, in above-mentioned Arch foot support meanss, the first supporting mechanism includes：Conduit saddle and the first connecting plate；Its
In, the top of conduit saddle is connected with lower boom, and the bottom of conduit saddle is connected by the first connecting plate with support frame.
Further, in above-mentioned Arch foot support meanss, conduit saddle is multiple, and each conduit saddle is set up in parallel and is all connected to down
Between chord member and the first connecting plate.
Further, in above-mentioned Arch foot support meanss, the first supporting mechanism also includes：Clutch mechanism, the first connection
Plate is connected by clutch mechanism with support frame.
Further, in above-mentioned Arch foot support meanss, clutch mechanism includes：Second connecting plate and connector；Wherein,
Second connecting plate is arranged at the lower section of the first connecting plate and is connected with the first connecting plate；Connector is bending part, connector
First bending part is connected with the second connecting plate, and the second bending part of connector is connected with support frame.
Further, in above-mentioned Arch foot support meanss, reinforcement is provided between the first bending part and the second bending part
Plate.
Further, in above-mentioned Arch foot support meanss, the second supporting mechanism includes：Crossbeam and two it is parallel arrangement of
Support bar；Wherein, the first end of each support bar is connected with top boom, and the second end of each support bar is connected with crossbeam；
Crossbeam is connected with support frame.
Further, in above-mentioned Arch foot support meanss, support frame includes：First support body, the second support body and the 3rd frame
Body；Wherein, the first support body is placed in the lower section of arch springing to be supported and is connected with cushion cap；Second support body is placed under arch springing to be supported
Side, the second support body is placed in the top of the first support body and is connected with first body phase, and lower boom passes through the first supporting mechanism and second
Support body is connected；Triframe body is corresponding with the position of arch springing to be supported, and triframe body is placed in the top of the second support body and with
Two support bodys are connected, and top boom is connected by the second supporting mechanism with triframe body.
The first supporting mechanism in the present invention is connected to the lower boom of arch springing to be supported, and the second supporting mechanism, which is connected to, to be waited to prop up
The top boom of arch springing is supportted, also, the first supporting mechanism is connected with the second supporting mechanism with support frame, and then realize and treat
Support arch springing is pre-buried using the measure progress rigidly fixed, so that arch springing to be supported is waited to prop up when interting construction before civil engineering is poured
The angles and positions of support arch springing are not subjected to displacement, deflection, it is ensured that setting angle and the elements of a fix, while also eliminating to be supported
The adjustment time of arch springing, improves efficiency of construction.
On the other hand, the invention allows for a kind of construction method of Arch foot support meanss.This method includes as follows
Step：Supporting mechanism installation steps, the first supporting mechanism and the second supporting mechanism are respectively arranged in the lower edge of arch springing to be supported
Bar and top boom；Support frame installation steps, support frame is connected with the cushion cap of arch springing to be supported, by the first supporting mechanism and branch
Support is connected, and the second supporting mechanism is connected with support frame.
Further, in the construction method of above-mentioned Arch foot support meanss, support frame installation steps further comprise：The
One erection of frames sub-step, support frame includes：First support body, the second support body and triframe body；First support body is placed in be supported
The lower section of arch springing and it is connected with cushion cap；Second erection of frames sub-step, the second support body is placed in the lower section of arch springing to be supported, will
Second support body is placed in the top of the first support body and is connected with first body phase, and lower boom passes through the first supporting mechanism and the second support body
It is connected；Triframe body installs sub-step, and triframe body is corresponding with the position of arch springing to be supported, and triframe body is placed in into second
The top of support body and it is connected with the second support body, top boom is connected by the second supporting mechanism with triframe body.
First supporting mechanism is connected to the lower boom of arch springing to be supported in the present invention, the second supporting mechanism is connected to and treated
The top boom of arch springing is supported, also, the first supporting mechanism is connected with the second supporting mechanism with support frame, and then realized pair
Arch springing to be supported is pre-buried using the measure progress rigidly fixed, so that arch springing to be supported is treated when interting construction before civil engineering is poured
The angles and positions of support arch springing are not subjected to displacement, deflection, it is ensured that setting angle and the elements of a fix, wait to prop up while also eliminating
The adjustment time of arch springing is supportted, efficiency of construction is improved.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the structural representation of Arch foot support meanss provided in an embodiment of the present invention；
Fig. 2 be Arch foot support meanss provided in an embodiment of the present invention in, the structural representation of the first supporting mechanism；
Fig. 3 be Arch foot support meanss provided in an embodiment of the present invention in, the structural representation of the second supporting mechanism；
Fig. 4 be Arch foot support meanss provided in an embodiment of the present invention in, the structural representation of support frame；
Fig. 5 is the flow chart of the construction method of Arch foot support meanss provided in an embodiment of the present invention；
Fig. 6 for Arch foot support meanss provided in an embodiment of the present invention construction method in, support frame installation steps
Flow chart.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.It should be noted that in the case where not conflicting, embodiment in the present invention and
Feature in embodiment can be mutually combined.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Device embodiment：
Referring to Fig. 1, the preferred structure for the Arch foot support meanss that the present embodiment is provided is shown in figure.As illustrated,
The device includes：Support frame 1, the first supporting mechanism 2 and the second supporting mechanism 3.
Wherein, arch springing 4 to be supported can prop up the bottom of support frame 1 with waiting in workshop pre-production (for Fig. 1)
The cushion cap 41 of support arch springing 4 is connected using expansion bolt.With reference to ground sample and moulding bed position, in the lower boom 42 of arch springing 4 to be supported
Lower surface selection one at known coordinate point, the first supporting mechanism 2 is welded in lower boom 42, and the first supporting mechanism 2 with
Support frame 1 is connected, and then realizes that lower boom 42 is connected by the first supporting mechanism 2 with support frame 1.Arch springing 4 to be supported
The upper surface of top boom 43 is welded with the second supporting mechanism 3, and the second supporting mechanism 3 is connected with support frame 1, and then realizes
Top boom 43 is connected by the second supporting mechanism 3 with support frame 1.
In the present embodiment, the first supporting mechanism 2 is connected to the lower boom 42 of arch springing 4 to be supported, and the second supporting mechanism 3 is connected
In the top boom 43 of arch springing 4 to be supported, also, the first supporting mechanism 2 is connected with the second supporting mechanism 3 with support frame 1, enters
And realize treat support arch springing 4 carried out using the measure that rigidly fixes it is pre-buried so that arch springing to be supported 4 is worn before civil engineering is poured
When inserting construction, the angles and positions of arch springing 4 to be supported are not subjected to displacement, deflection, it is ensured that setting angle and the elements of a fix, simultaneously
The adjustment time of arch springing 4 to be supported is also eliminated, efficiency of construction is improved.
Referring to Fig. 2, shown in figure the present embodiment provide Arch foot support meanss in, the first supporting mechanism 2 it is excellent
Select structure.As illustrated, the first supporting mechanism 2 can include：The connecting plate 22 of conduit saddle 21 and first.Wherein, the top of conduit saddle 21
(for Fig. 2) can be welded in the lower surface of lower boom 42, and the bottom (for Fig. 2) of conduit saddle 21 is welded with
One connecting plate 22, and the first connecting plate 22 is then connected with support frame 1.During specific implementation, the first connecting plate 22 should be strictly controlled
With plane-parallel.Reinforcing plate can be provided between the connecting plate 22 of conduit saddle 21 and first.Conduit saddle 21 can be lattice conduit saddle.
Conduit saddle 21 can be multiple, and each conduit saddle 21 is juxtaposed between the connecting plate 22 of lower boom 42 and first, and then to lower boom 42
Preferably supported.
In above-described embodiment, the first supporting mechanism 2 can also include：Clutch mechanism 23.First connecting plate 22 passes through overlap joint
Mechanism 23 is connected with support frame 1, and then realizes effective overlap joint of conduit saddle 21 and support frame 1.Clutch mechanism 23 can include：The
Two connecting plates 231 and connector 232.Wherein, the second connecting plate 231 is stacked in the lower section of the first connecting plate 22 and is connected with first
The bolt connection of plate 22.Connector 232 can be bending part, and the first bending part 2321 of connector 232 can be with the second connecting plate
231 are connected, and the second bending part 2322 of connector 232 can be connected with support frame 1.During specific implementation, the second connecting plate
231 lower surface can be welded with multiple steel plates 6 being set up in parallel, and the bottom of each steel plate 6 is upper with the first bending part 2321
Mutually weld on surface.Reinforcing plate 5 can be provided between first bending part 2321 and the second bending part 2322, to strengthen connector
232 rigidity.
Referring to Fig. 3, shown in figure the present embodiment provide Arch foot support meanss in, the second supporting mechanism 3 it is excellent
Select structure.As illustrated, the second supporting mechanism 3 can include：Crossbeam 31 and two parallel arrangement of support bars 32.Wherein, respectively
The first end (lower end shown in Fig. 3) of support bar 32 can mutually be welded with top boom 43, second end (Fig. 3 of each support bar 32
Shown upper end) can mutually it be welded with crossbeam 31.During specific implementation, the first end of each support bar 32 can be arc, enter
And top boom 43 of more fitting.Crossbeam 31 and then can realize Fast Installation with the bolt connection of support frame 1.Each support bar 32 should
With horizontal plane, the center of gravity for balancing arch springing 4 to be supported, occur to avoid arch springing 4 to be supported from being in encorbelmenting state compared with
It is big to tilt.
Referring to Fig. 4, shown in figure in the Arch foot support meanss provided for the present embodiment, the preferred machine of support frame 1
Structure.As illustrated, support frame 1 can include：First support body 11, the second support body 12 and triframe body 13.Wherein, the first support body
11st, the second support body 12 and triframe body 13 are stacked and bolt connection successively from bottom to up, and the first support body 11 is placed in arch springing 4 to be supported
Lower section and be connected with cushion cap 41 using expansion bolt, triframe body 13 is corresponding with the position of arch springing 4 to be supported, lower boom
42 are connected by the first supporting mechanism 2 with the second support body 12, and top boom 43 passes through the second supporting mechanism 3 and the phase of triframe body 13
Connection.During specific implementation, the first support body 11 can be that one chip can also be lattice.The highly desirable satisfaction of second support body 12
Movement requirement, is allowed to not overlength, not non-ultra-wide, superelevation；It can be provided between second connecting plate 22 and the second bending part 2322
The preferable H profile steel 7 of force-bearing situation；In addition, according to the actual requirements, cant beam and outrigger can be set at the crossbeam of the second support body 12
It is used as the support meanss of the power transmission of the second supporting mechanism 3.
To sum up, the first supporting mechanism is connected to the lower boom of arch springing to be supported, the connection of the second supporting mechanism in the present embodiment
In the top boom of arch springing to be supported, also, the first supporting mechanism is connected with the second supporting mechanism with support frame, and then realizes
Treat support arch springing carried out using the measure rigidly fixed it is pre-buried so that arch springing to be supported interts construction before civil engineering is poured
When, the angles and positions of arch springing to be supported are not subjected to displacement, deflection, it is ensured that setting angle and the elements of a fix, while also saving
The adjustment time of arch springing to be supported, improves efficiency of construction.
Embodiment of the method：
Referring to Fig. 5, the flow chart of the construction method for the Arch foot support meanss that Fig. 5 provides for the present embodiment.As schemed
Show, this method comprises the following steps：
Supporting mechanism installation steps S510, arch springing to be supported is respectively arranged in by the first supporting mechanism and the second supporting mechanism
Lower boom and top boom.
Specifically, with reference to ground sample and moulding bed position, known at the lower surface selection one of the lower boom 42 of arch springing 4 to be supported
Coordinate points, lower boom 42 is welded in by the first supporting mechanism 2.In the upper surface welding second of the top boom 43 of arch springing 4 to be supported
Supporting mechanism.
Support frame installation steps S520, support frame is connected with the cushion cap of arch springing to be supported, by the first supporting mechanism with
Support frame is connected, and the second supporting mechanism is connected with support frame.
Specifically, arch springing 4 to be supported can be in workshop pre-production, by the bottom (for Fig. 1) of support frame 1 with treating
The cushion cap 41 of support arch springing 4 is connected using expansion bolt.Then the first supporting mechanism 2 is connected with support frame 1, finally will
Second supporting mechanism 3 is connected with support frame 1.
In the present embodiment, the first supporting mechanism 2 is connected to the lower boom 42 of arch springing 4 to be supported, by the second supporting mechanism 3
The top boom 43 of arch springing 4 to be supported is connected to, also, the first supporting mechanism 2 is connected with the second supporting mechanism 3 with support frame 1
Connect, so realize treat support arch springing 4 carried out using the measure that rigidly fixes it is pre-buried so that arch springing to be supported 4 is poured in civil engineering
Before building during interspersed construction, the angles and positions of arch springing 4 to be supported are not subjected to displacement, deflection, it is ensured that setting angle and positioning are sat
Mark, while also eliminating the adjustment time of arch springing 4 to be supported, improves efficiency of construction.
Referring to Fig. 6, in an embodiment of the present invention, support frame installation steps S520 may further include：
Support frame 1 includes：First support body 11, the second support body 12 and triframe body 13.
First erection of frames sub-step S521, is placed in the lower section of arch springing to be supported by the first support body and is connected with cushion cap.
Specifically, the first support body 11 is placed in the lower section of arch springing 4 to be supported, also, the first support body 11 is used with cushion cap 41
Expansion bolt is connected,
Second erection of frames sub-step S522, the second support body is placed in the lower section of arch springing to be supported, the second support body is placed in
The top of first support body and it is connected with first body phase, lower boom is connected by the first supporting mechanism with the second support body.
Specifically, the second support body 12 is placed in the lower section of arch springing 4 to be supported and be placed on the first support body 11, by the second support body
12 and the bolt connection of the first support body 11, lower boom 42 is connected by the first supporting mechanism 2 with the second support body 12.
Triframe body installs sub-step S523, and triframe body is corresponding with the position of arch springing to be supported, and triframe body is put
It is connected in the top of the second support body and with the second support body, top boom is connected by the second supporting mechanism with triframe body.
Specifically, the position of triframe body 13 is corresponding with the position of arch springing 4 to be supported, and triframe body 13 is placed in into second
On support body 12 and with the bolt connection of the second support body 12, top boom 43 is connected by the second supporting mechanism 3 with triframe body 13.Need
It is noted that the installation of the first support body 11, the second support body 12 and triframe body 13 is first completed, then again by the first supporting mechanism
2 are connected with support frame 1, and finally the second supporting mechanism 3 is connected with support frame 1.
In the present embodiment, the installation of the first support body 11, the second support body 12 and triframe body 13 is first completed, then again by first
Supporting mechanism 2 is connected with support frame 1, and finally the second supporting mechanism 3 is connected with support frame 1, it is ensured that support frame 1,
The accurate installation of one supporting mechanism 2 and the second supporting mechanism 3 and arch springing 4 to be supported.
To sum up, the first supporting mechanism is connected to the lower boom of arch springing to be supported, by the second supporting mechanism in the present embodiment
The top boom of arch springing to be supported is connected to, also, the first supporting mechanism is connected with the second supporting mechanism with support frame, and then
Realizing to treat supports arch springing pre-buried using the measure progress rigidly fixed, is applied so that arch springing to be supported interts before civil engineering is poured
In man-hour, the angles and positions of arch springing to be supported are not subjected to displacement, deflection, it is ensured that setting angle and the elements of a fix, while also saving
The adjustment time of arch springing to be supported has been gone, efficiency of construction is improved.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and modification of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of Arch foot support meanss, it is characterised in that including：Support frame (1), the first supporting mechanism (2) and second
Support mechanism (3)；Wherein,
The bottom of support frame as described above (1) is connected with the cushion cap (41) of arch springing to be supported (4)；
The lower boom (42) of the arch springing to be supported (4) is connected by first supporting mechanism (2) with support frame as described above (1)
Connect；
The top boom (43) of the arch springing to be supported (4) is connected by second supporting mechanism (3) with support frame as described above (1)
Connect.
2. Arch foot support meanss according to claim 1, it is characterised in that first supporting mechanism (2) includes：
Conduit saddle (21) and the first connecting plate (22)；Wherein,
The top of the conduit saddle (21) is connected with the lower boom (42), and the bottom of the conduit saddle (21) connects by described first
Fishplate bar (22) is connected with support frame as described above (1).
3. Arch foot support meanss according to claim 2, it is characterised in that
The conduit saddle (21) is multiple, and each conduit saddle (21) is set up in parallel and is all connected to the lower boom (42) and described the
Between one connecting plate (22).
4. Arch foot support meanss according to claim 2, it is characterised in that first supporting mechanism (2) is also wrapped
Include：
Clutch mechanism (23), first connecting plate (22) is connected by the clutch mechanism (23) with support frame as described above (1).
5. Arch foot support meanss according to claim 4, it is characterised in that the clutch mechanism (23) includes：The
Two connecting plates (231) and connector (232)；Wherein,
Second connecting plate (231) be arranged at the lower section of first connecting plate (22) and with the first connecting plate (22) phase
Connection；
The connector (232) is bending part, the first bending part (2321) and second connecting plate of the connector (232)
(231) it is connected, the second bending part (2322) of the connector (232) is connected with support frame as described above (1).
6. Arch foot support meanss according to claim 5, it is characterised in that
Reinforcing plate (5) is provided between first bending part (2321) and second bending part (2322).
7. Arch foot support meanss according to claim 1, it is characterised in that second supporting mechanism (3) includes：
Crossbeam (31) and two parallel arrangement of support bars (32)；Wherein,
The first end of each support bar (32) is connected with the top boom (43), the second end of each support bar (32)
It is connected with the crossbeam (31)；
The crossbeam (31) is connected with support frame as described above (1).
8. Arch foot support meanss according to any one of claim 1 to 7, it is characterised in that support frame as described above (1)
Including：First support body (11), the second support body (12) and triframe body (13)；Wherein,
First support body (11) is placed in the lower section of the arch springing to be supported (4) and is connected with the cushion cap (41)；
Second support body (12) is placed in the lower section of the arch springing to be supported (4), and second support body (12) is placed in described first
The top of support body (11) and it is connected with first support body (11), the lower boom (42) passes through first supporting mechanism
(2) it is connected with second support body (12)；
The triframe body (13) is corresponding with the position of the arch springing (4) to be supported, and the triframe body (13) is placed in described
The top of second support body (12) and it is connected with second support body (12), the top boom (43) passes through the described second support machine
Structure (3) is connected with the triframe body (13).
9. a kind of construction method of Arch foot support meanss, it is characterised in that comprise the following steps：
Supporting mechanism installation steps, the first supporting mechanism and the second supporting mechanism are respectively arranged in the lower boom of arch springing to be supported
And top boom；
Support frame installation steps, support frame is connected with the cushion cap of the arch springing to be supported, by first supporting mechanism with
Support frame as described above is connected, and second supporting mechanism is connected with support frame as described above.
10. the construction method of Arch foot support meanss according to claim 9, it is characterised in that support frame as described above is pacified
Dress step further comprises：
First erection of frames sub-step, support frame as described above includes：First support body, the second support body and triframe body；By described first
Support body is placed in the lower section of the arch springing to be supported and is connected with the cushion cap；
Second erection of frames sub-step, second support body is placed in the lower section of the arch springing to be supported, by second support body
Be placed in the top of first support body and be connected with the first body phase, the lower boom by first supporting mechanism with
Second support body is connected；
Triframe body installs sub-step, and the triframe body is corresponding with the position of the arch springing to be supported, by the 3rd frame
Body is placed in the top of second support body and is connected with second support body, and the top boom passes through second supporting mechanism
It is connected with the triframe body.
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