CN109252449A - The two-tube neat note construction of cantilever beam vertical duct mud jacking - Google Patents
The two-tube neat note construction of cantilever beam vertical duct mud jacking Download PDFInfo
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- CN109252449A CN109252449A CN201811204273.2A CN201811204273A CN109252449A CN 109252449 A CN109252449 A CN 109252449A CN 201811204273 A CN201811204273 A CN 201811204273A CN 109252449 A CN109252449 A CN 109252449A
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- vertical prestressing
- vertical
- casing
- prestressing
- mud jacking
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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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- 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
- E01D21/10—Cantilevered erection
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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Abstract
The present invention relates to technical field of bridge construction, more particularly, to a kind of two-tube neat note construction of cantilever beam vertical duct mud jacking.The engineering method is the following steps are included: firstly, to vertical prestressing bar and vertical prestressing casing blanking；In next step, pore-forming working process is carried out to the vertical prestressing casing after blanking；In next step, vertical prestressing beam is assembled；In next step, while web reinforcement is bound, by assembled vertical prestressing Shu Jinhang location and installation；In next step, the bottom of adjacent two vertical prestressing casings is connected to；In next step, tensioning is carried out to vertical prestressing bar；Finally, the mud jacking into vertical prestressing casing.By using the engineering method, the mud jacking in vertical prestressing beam can be made more closely knit full, to make mud jacking concrete more protrude the cementation effect that bonds of presstressed reinforcing steel, the stress loss of vertical prestressing beam is avoided to a greater degree, makes cantilever beam concrete that there is better cracking resistance.
Description
Technical field
This application involves technical field of bridge construction, apply more particularly, to a kind of two-tube neat note of cantilever beam vertical duct mud jacking
Work engineering method.
Background technique
Cantilever beam vertical duct mud jacking construction is usually that cantilever beam is completed in concreting, and presstressed reinforcing steel is completed
After tensioning, mud jacking is carried out to prestress pipe one by one；However, in this way, not only time-consuming for tensioning mud jacking, but also mud jacking density is poor,
Can not effective protection presstressed reinforcing steel from corrosion, seriously affect the cracking resistance of bridge.
Summary of the invention
It is existing to solve the purpose of the present invention is to provide a kind of two-tube neat note construction of cantilever beam vertical duct mud jacking
Time-consuming for tensioning mud jacking during Cantilever Beam Construction in technology, the technical problem of mud jacking density difference.
The present invention provides a kind of two-tube neat note constructions of cantilever beam vertical duct mud jacking, comprising the following steps:
Step 100, vertical prestressing bar and vertical prestressing casing blanking；
Step 200, vertical prestressing casing pipe hole forming working process；
Step 300, assembling vertical prestressing beam；
Step 400, vertical prestressing beam location and installation and web reinforcement binding；
Step 500, the connection of adjacent two vertical prestressing sleeve bottoms；
Step 600, vertical prestressing bar tensioning；
Step 700, vertical prestressing casing mud jacking.
Further, the Specific construction process of the step 100 are as follows: according to the height of cantilever beam each position web and section
The cutting length of the vertical prestressing bar and the vertical prestressing casing is calculated in size, using cutting machine to described perpendicular
It is cut to presstressed reinforcing steel and the vertical prestressing casing.
Further, the vertical prestressing bar is the fining twisted steel of diameter 32mm, and the vertical prestressing casing is
The iron sheet casing of internal diameter 51mm.
Further, the Specific construction process of the step 200 are as follows: respectively apart from it on the vertical prestressing casing
Gas cutting aperture at top and the position of bottom end 20cm-30cm, corresponds to the first circular hole and the second circular hole；
The first short tube is welded at first circular hole, the second short tube is welded at second circular hole, described first is short
Pipe and second short tube are connected with the vertical prestressing casing respectively.
Further, the Specific construction process of the step 300 are as follows: be set in the vertical prestressing casing described perpendicular
To outside presstressed reinforcing steel, and the vertical prestressing casing is stretched out at the both ends of the vertical prestressing bar；
The both ends of the vertical prestressing beam are connected with anchor connection component respectively, and the anchor connection component includes anchor
Gu nut, backing plate and spiral bar；
One end of the spiral bar is fixedly connected with the backing plate, and the central axes of the backing plate and the spiral bar are mutually hung down
Directly；Offer through-hole at the backing plate center, one end of the vertical prestressing bar sequentially passes through the spiral bar and described logical
Bolt-nut described in Kong Houyu is connected；The both ends of the vertical prestressing casing are each passed through the spiral bar and erect with described
It leans to the backing plate at presstressed reinforcing steel both ends；
It is formed after the vertical prestressing bar, the vertical prestressing casing and anchor connection component assembling vertical pre-
Stress beam.
Further, the Specific construction process of the step 400 are as follows: to the same of the web reinforcement binding in cantilever beam
When, to the vertical prestressing Shu Jinhang location and installation；The more vertical prestressing beams by diameter be 10mm round steel be in
Intersecting parallels binding and fixing, and the more vertical prestressing beams are welded and fixed with the web reinforcement.
Further, the Specific construction process of the step 500 are as follows: the vertical prestressing beam of adjacent two is one
Second short tube of group, the vertical prestressing casing shoe of two of vertical prestressing beam described in every group passes through steel wire tube phase
Connection.
Further, in the step 500, in vertical prestressing beam described in every group, a vertical prestressing casing
First short tube on top is stock inlet, and first short tube of another vertical prestressing cannula tip is pulp
Mouthful.
Further, the Specific construction process of the step 600 are as follows: using centre-hole jack to the vertical prestressing
Muscle carries out one-end tension, and using stretching mode twice.
Further, the Specific construction process of the step 700 are as follows: make in 24 hours after the completion of the step 600
With pneumatic mortar machine vertical prestressing Shu Jinhang mud jacking described in every group, by the stock inlet to the vertical prestressing casing internal pressure
Then slurry seals the stock inlet and the grout outlet until the grout outlet emerges underflow and slurry does not sink
It is stifled.
Compared with prior art, the application has the beneficial effect that
The two-tube neat note construction of a kind of cantilever beam vertical duct mud jacking provided by the present application, comprising the following steps: firstly,
To vertical prestressing bar and vertical prestressing casing blanking；In next step, pore-forming is carried out to the vertical prestressing casing after blanking to add
Work processing；In next step, vertical prestressing beam is assembled；In next step, it while web reinforcement is bound, is vertically answered assembled in advance
Power Shu Jinhang location and installation；In next step, the bottom of adjacent two vertical prestressing casings is connected to；In next step, to vertically answering in advance
Power muscle carries out tensioning；Finally, the mud jacking into vertical prestressing casing.
By using the two-tube neat note construction of cantilever beam vertical duct mud jacking, the mud jacking in vertical prestressing beam can be made
It is more closely knit full, so that mud jacking concrete be made more to protrude the cementation effect that bonds of presstressed reinforcing steel, avoid to a greater degree
The stress loss of vertical prestressing beam makes cantilever beam concrete have better cracking resistance；The engineering method is used simultaneously, while right
Two vertical prestressing Shu Jinhang mud jacking, highly shortened the time of cantilever beam vertical tension mud jacking, to also reduce perpendicular
To the stress loss of prestressing tendon, the cracking resistance of cantilever beam is further improved.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of two-tube neat note construction process flow of cantilever beam vertical duct mud jacking provided by the embodiments of the present application
Figure；
Fig. 2 is the two-tube neat note construction process stream of another cantilever beam vertical duct mud jacking provided by the embodiments of the present application
Cheng Tu；
Fig. 3 is that the two-tube neat note construction vertical prestressing beam of cantilever beam vertical duct mud jacking that the embodiment of the present application supplies shows
It is intended to；
Fig. 4 is two-tube neat every group of note construction of cantilever beam vertical duct mud jacking provided by the embodiments of the present application and vertically answers in advance
Power Shu Liantong schematic diagram；
Fig. 5 is the two-tube neat note construction process principle figure of cantilever beam vertical duct mud jacking provided by the embodiments of the present application.
Fig. 6 is that the two-tube neat note construction cantilever beam of cantilever beam vertical duct mud jacking provided by the embodiments of the present application is vertically pre-
Stress beam floor plan.
Appended drawing reference:
1- vertical prestressing bar, 2- vertical prestressing casing, 3- spiral bar, 4- backing plate, 5- bolt-nut, 6- first are short
Pipe, the second short tube of 7-, 8- stock inlet, 9- grout outlet.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.
The component for the embodiment of the present invention for usually describing and showing in attached drawing here can be with a variety of different configurations
To arrange and design.Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below and is wanted
The scope of the present invention of protection is sought, but is merely representative of selected embodiment of the invention.
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Referring to the two-tube neat note of cantilever beam vertical duct mud jacking of Fig. 1 to Fig. 6 description according to some embodiments of the invention
Construction.
Embodiments herein provides a kind of two-tube neat note construction of cantilever beam vertical duct mud jacking, as shown in Figure 1,
The following steps are included:
2 blanking of step 100, vertical prestressing bar 1 and vertical prestressing casing；
Step 200,2 pore-forming working process of vertical prestressing casing；
Step 300, assembling vertical prestressing beam；
Step 400, vertical prestressing beam location and installation and web reinforcement binding；
Step 500, the connection of 2 bottom of adjacent two vertical prestressing casings；
Step 600,1 tensioning of vertical prestressing bar；
Step 700,2 mud jacking of vertical prestressing casing.
The two-tube neat note construction of cantilever beam vertical duct mud jacking provided by the embodiments of the present application has a characteristic that
1, the two-tube neat note construction of cantilever beam vertical duct mud jacking, vertical prestressing mud jacking is closely knit full, mud jacking concrete pair
Presstressed reinforcing steel bonds cementation effect and more protrudes, and avoids the stress loss of vertical prestressing beam to a greater degree, makes to hang
Arm beam concrete has better cracking resistance；
2, it is constructed simultaneously using this engineering method, every segment vertical tension mud jacking time averagely reduces half or so, greatly saves
The time of about cantilever beam vertical tension mud jacking further improves to also reduce the stress loss of vertical prestressing beam
The cracking resistance of cantilever beam；
3, the two-tube neat note construction of cantilever beam vertical duct mud jacking, process is simple, easy to operate, only needs 3~4 operations
Personnel, and labor intensity is low, construction safety is reliable.
In one embodiment of the application, it is preferable that the Specific construction process of step 100 are as follows: according to cantilever beam everybody
The cutting length of vertical prestressing bar 1 and vertical prestressing casing 2 is calculated in the height and sectional dimension of setting web, using cutting
Cutting mill cuts vertical prestressing bar 1 and vertical prestressing casing 2.
In step 100, first according to the height and section ruler of each position web provided in Design of Cantilever Beam drawing
The very little required length to vertical prestressing bar 1 and vertical prestressing casing 2 calculates；Then according to resulting calculated result into
Vertical prestressing bar 1 and vertical prestressing casing 2 are cut to required length using cutting machine by row blanking.
In one embodiment of the application, it is preferable that vertical prestressing bar 1 selects the fining twisted steel of diameter 32mm,
The iron sheet casing of the selection of vertical prestressing casing 2 internal diameter 51mm；
In this step, vertical prestressing bar 1 uses diameter for 32mm, and normal intensity is the finish rolling spiral shell of FPK=830MPa
Line reinforcing bar, control stress for prestressing is 705.5MPa under anchor；Vertical prestressing casing 2 uses internal diameter for the iron sheet casing of 51mm.
In one embodiment of the application, it is preferable that the Specific construction process of step 200 are as follows: in vertical prestressing set
The gas cutting aperture at its top and the position of bottom end 20cm-30cm respectively, corresponds to the first circular hole and the second circular hole on pipe 2；
The first short tube 6 is welded at the first circular hole, welds the second short tube 7 at the second circular hole, first short tube 6 and described second short
Pipe 7 is connected with the vertical prestressing casing 2 respectively.
In this step, pore-forming working process is carried out to the vertical prestressing casing 2 after blanking；First with gas cutting machine,
In the position gas cutting aperture respectively at 2 top of vertical prestressing casing and bottom end 20-30cm, it is located at vertical prestressing casing
The circular hole on 2 tops is the first circular hole, and the circular hole positioned at 2 bottom end of vertical prestressing casing is the second circular hole；Then, cutting machine is utilized
The iron pipe of outer diameter 25mm is cut into the short tube that one end has certain connection angle, it is standby as the first short tube 6 and the second short tube 7
With；Finally, after 2 pore-forming completion of processing of vertical prestressing casing, by the first short tube 6 of the outer diameter 25mm processed in advance
It is respectively welded at the first circular hole and at the second circular hole with the second short tube 7.
The process is simple, easy to operate, only 3~4 operating personnels is needed to can be completed, and labor intensity is low, applies
Work safety, while also greatly reducing cost of labor.
It should be noted that needing to examine position of opening and size after the completion of the 2 gas cutting aperture of vertical prestressing casing
It looks into, it is excessive to prevent aperture, the welding of the first short tube 6 and the second short tube 7 is influenced, guarantees the sealing effect of weld, to guarantee
The overall tightness of vertical prestressing casing 2 keeps vertical prestressing mud jacking more closely knit full, improves construction quality；Specifically open
Hole size is about 15mm or so.
In one embodiment of the application, it is preferable that as shown in figure 3, the Specific construction process of step 300 are as follows: will erect
It is set in outside vertical prestressing bar 1 to prestressed casing 2, and vertical prestressing casing is stretched out at the both ends of vertical prestressing bar 1
2；The both ends of vertical prestressing beam are connected with anchor connection component respectively, and anchor connection component includes bolt-nut 5, backing plate 4
With spiral bar 3；One end of spiral bar 3 is fixedly connected with backing plate 4, and backing plate 4 and the central axes of spiral bar 3 are perpendicular；In backing plate 4
Through-hole is offered at the heart, one end of vertical prestressing bar 1 is connected after sequentially passing through spiral bar 3 and through-hole with bolt-nut 5；It is perpendicular
Spiral bar 3 is each passed through to the both ends of prestressed casing 2 and is leant with the backing plate 4 at 1 both ends of vertical prestressing bar；Vertically answer in advance
Vertical prestressing beam is formed after power muscle 1, vertical prestressing casing 2 and the assembling of anchor connection component.
In this step, vertical prestressing bar 1, vertical prestressing casing 2 and anchor connection component are subjected to assembled formation,
Form vertical prestressing beam；
Firstly, vertical prestressing casing 2 is set on the outside of vertical prestressing, and the both ends of presstressed reinforcing steel are stretched out and erected
To prestress pipe；
Then, anchor connection component is installed at the both ends of vertical prestressing beam, wherein anchor connection component includes anchoring spiral shell
Mother 5, backing plate 4 and spiral bar 3；Specifically, installation process is described by taking one end of vertical prestressing beam as an example, first in advance by spiral
It is welded with backing plate 4 one end of muscle 3, it should be noted that backing plate 4 is vertical with the central axes of spiral bar 3, and puts and weld
Gu；Secondly through-hole is offered at 4 center of backing plate, the vertical prestressing casing 2 being set in together is passed through with vertical prestressing bar 1
Spiral bar 3 makes vertical prestressing casing 2 lean with backing plate 4, and vertical pretightning force muscle passes through the circular hole at 4 center of backing plate；Finally
Bolt-nut 5 is screwed with the vertical prestressing bar 1 for stretching out backing plate 4 and is connect；The other end of vertical prestressing beam also uses identical
Mode assembled with anchor connection component.
Vertical prestressing beam after assembling screws the bolt-nut 5 at vertical prestressing beam both ends, makes vertical prestressing casing
2 both ends and 4 tight abutment of backing plate, the especially lower end of vertical prestressing casing 2 tight abutment will seal between backing plate 4.
It should be noted that anchor connection component can select the anchorage of existing model JLM-32, the vertical prestressing with use
The specification of muscle 1 is adapted.
In one embodiment of the application, it is preferable that as shown in fig. 6, the Specific construction process of step 400 are as follows: right
While web reinforcement in cantilever beam is bound, to vertical prestressing Shu Jinhang location and installation；More vertical prestressing beams pass through
The round steel that diameter is 10mm is in intersecting parallels binding and fixing, and more vertical prestressing beams are welded and fixed with web reinforcement.
In this step, in the location and installation and cantilever beam of vertical prestressing beam web reinforcement installation binding simultaneously into
Row；According to the requirement of design drawing, more vertical prestressing beams are accurately positioned and are designed on the plan-position of coordinate, and passed through
Diameter is that the round steel of 10mm binds it, and vertical prestressing beam and the web reinforcement in the cantilever beam that leans are welded
Connect fixation so that the accurate positioning of vertical prestressing beam, securely；Specifically, the spacing of adjacent two web reinforcements is 10cm, is used for
Reinforce web；The spacing of adjacent two vertical prestressing beams is 50cm, for improving the cracking resistance of cantilever beam concrete.
In one embodiment of the application, it is preferable that as shown in figure 4, the Specific construction process of step 500 are as follows: adjacent
Two vertical prestressing beams be one group, the second short tube 7 of two 2 bottom ends of vertical prestressing casing of every group of vertical prestressing beam
It is connected by steel wire tube.
In this step, by adjacent mono- group of two vertical prestressing Shu Zuowei, by two vertical prestressings in one group
Casing 2 is connected by the second short tube 7 of bottom end, so that two vertical prestressing casings 2 in same group be made to be connected；Steel wire
The junction of pipe and the second short tube 7 should be close, securely, is bound when necessary using iron wire, makes steel wire tube and the second short tube 7
It connects closer secured；Then remaining each group is vertically answered in advance beam complete connection using identical method.
It should be noted that in every group of vertical prestressing beam, first short tube 6 on 2 top of vertical prestressing casing is
Stock inlet 8, first short tube 6 on another 2 top of vertical prestressing casing are grout outlet 9；It is carried out to every group of vertical prestressing
When mud jacking, slurry is filled in vertical prestressing casing 2 by stock inlet 8, until slurry is emerged from grout outlet 9.
In one embodiment of the application, it is preferable that the Specific construction process of step 600 are as follows: very heavy using punching
Top carries out one-end tension to vertical prestressing bar 1, and using stretching mode twice.
In this step, since the cantilever beam workshop section for having completed to pour, the tensioning of vertical prestressing bar 1 is carried out；It is perpendicular
One-end tension is used to presstressed reinforcing steel 1, and uses tensioning twice, i.e., carries out second of tensioning after first time tensioning is completed 1 day；
Specifically, the tension operation sequence of vertical prestressing bar 1 are as follows: firstly, the pad of the anchor connection component at cleaning top
Plate 4 makees the mark point of measurement elongation on backing plate 4, and measures from the mark point on backing plate 4 to 1 top of vertical prestressing bar
Distance as calculate elongation initial value；Then jack pair vertical prestressing bar 1 is utilized according to correct operating instruction
Tensioning is carried out, the practical elongation of vertical prestressing bar 1 is measured after the completion of tensioning, judges whether to meet the requirements；If do not met
It is required that entering subsequent processing after analysis reason and processing；It is allowed for access after determining tensioning composite demand the next step；It needs
Illustrate, after the completion of tension of prestressed tendon, subsequent processing is preferably carried out in 24 hours.
In one embodiment of the application, it is preferable that as shown in figure 5, the Specific construction process of step 700 are as follows: in step
Using pneumatic mortar machine to every group of vertical prestressing Shu Jinhang mud jacking in 24 hours after the completion of rapid 500, by stock inlet 8 to vertical pre-
Mud jacking in stress casing 2, until grout outlet 9 emerges underflow and slurry does not sink, then to stock inlet 8 and grout outlet 9 into
Row blocks.
In this step, the mud jacking operation of prestressing tendon preferably carries out in 24 hours that a upper tension process is completed.Mud jacking
Before will in vertical prestressing pipeline sundries and ponding be purged, then pneumatic mortar machine is connected with stock inlet 8, starting pressure
Pulp grinder makes slurry from the prestressed casing that stock inlet 8 enters every group of prestressing tendon, the second short tube 7 by connection
It enters in another prestressed casing, until emerging slurries from the grout outlet 9 at the top of another prestressed casing；From grout outlet
Whether the slurry in 9 inspection prestressed casings sinks, to judge the closely knit situation of mud jacking；Sink if there is slurry
Situation should mend slurry in time, to guarantee that mud jacking is closely knit, after confirmation mud jacking is closely knit, block to stock inlet 8 and grout outlet 9, complete
At mud jacking operation.Mud jacking is carried out using this method, mud jacking can be made more closely knit, mud jacking concrete bonds cementation effect to presstressed reinforcing steel
Fruit is more preferable, to keep the cracking resistance of cantilever beam concrete more preferable.
Embodiments herein provides the two-tube neat note construction of another cantilever beam vertical duct mud jacking, such as Fig. 2 institute
Show, comprising the following steps:
Vertical prestressing bar 1 is calculated according to the height and sectional dimension of cantilever beam each position web and erects for step 100
To the cutting length of prestressed casing 2, vertical prestressing bar 1 and vertical prestressing casing 2 are cut using cutting machine；
Step 200, the gas cutting at its top and the position of bottom end 20cm-30cm respectively on vertical prestressing casing 2
Aperture corresponds to the first circular hole and the second circular hole；The first short tube 6 is welded at the first circular hole, and second is welded at the second circular hole
Short tube 7, the first short tube 6 and the second short tube 7 are connected with vertical prestressing casing 2 respectively；
Vertical prestressing casing 2 is set in outside vertical prestressing bar 1 by step 300, and the both ends of vertical prestressing bar 1
Stretch out vertical prestressing casing 2；The both ends of vertical prestressing beam are connected with anchor connection component respectively, anchor connection component
Including bolt-nut 5, backing plate 4 and spiral bar 3；One end of spiral bar 3 is fixedly connected with backing plate 4, and backing plate 4 and spiral bar 3
Central axes are perpendicular；Through-hole is offered at 4 center of backing plate, after one end of vertical prestressing bar 1 sequentially passes through spiral bar 3 and through-hole
It is connected with bolt-nut 5；The both ends of vertical prestressing casing 2 be each passed through spiral bar 3 and with 1 both ends of vertical prestressing bar
Backing plate 4 leans；Vertical prestressing is formed after vertical prestressing bar 1, vertical prestressing casing 2 and the assembling of anchor connection component
Beam；
Step 400, in cantilever beam web reinforcement bind while, to vertical prestressing Shu Jinhang location and installation；
More vertical prestressing beams are in intersecting parallels binding and fixing by the round steel that diameter is 10mm, and by more vertical prestressing beams and abdomen
Slab muscle is welded and fixed；
Step 500, two adjacent vertical prestressing beams are one group, two vertical prestressings of every group of vertical prestressing beam
Second short tube 7 of 2 bottom end of casing is connected by steel wire tube；
Step 600 carries out one-end tension to vertical prestressing bar 1 using centre-hole jack, and using tensioning side twice
Formula；
Step 700 uses pneumatic mortar machine to press every group of vertical prestressing Shu Jinhang in 24 hours after the completion of step 600
Slurry, by stock inlet 8 into vertical prestressing casing 2 mud jacking, until grout outlet 9 emerges underflow and slurry does not sink, so
Stock inlet 8 and grout outlet 9 are blocked afterwards.
By using the two-tube neat note construction of cantilever beam vertical duct mud jacking, the mud jacking in vertical prestressing beam can be made
It is more closely knit full, so that mud jacking concrete be made more to protrude the cementation effect that bonds of presstressed reinforcing steel, avoid to a greater degree
The stress loss of vertical prestressing beam makes cantilever beam concrete have better cracking resistance；The engineering method is used simultaneously, while right
Two vertical prestressing Shu Jinhang mud jacking, highly shortened the time of cantilever beam vertical tension mud jacking, to also reduce perpendicular
To the stress loss of prestressing tendon, the cracking resistance of cantilever beam is further improved.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of two-tube neat note construction of cantilever beam vertical duct mud jacking, which comprises the following steps:
Step 100, vertical prestressing bar and vertical prestressing casing blanking；
Step 200, vertical prestressing casing pipe hole forming working process；
Step 300, assembling vertical prestressing beam；
Step 400, vertical prestressing beam location and installation and web reinforcement binding；
Step 500, the connection of adjacent two vertical prestressing sleeve bottoms；
Step 600, vertical prestressing bar tensioning；
Step 700, vertical prestressing casing mud jacking.
2. the two-tube neat note construction of cantilever beam vertical duct mud jacking according to claim 1, which is characterized in that the step
Rapid 100 Specific construction process are as follows: be calculated according to the height of cantilever beam each position web and sectional dimension described vertical pre-
The cutting length of stress rib and the vertical prestressing casing, using cutting machine to the vertical prestressing bar and described vertical pre-
Stress casing is cut.
3. the two-tube neat note construction of cantilever beam vertical duct mud jacking according to claim 2, which is characterized in that described perpendicular
The fining twisted steel for being diameter 32mm to presstressed reinforcing steel, the vertical prestressing casing are the iron sheet casing of internal diameter 51mm.
4. the two-tube neat note construction of cantilever beam vertical duct mud jacking according to claim 1, which is characterized in that the step
Rapid 200 Specific construction process are as follows: the position apart from its top and bottom end 20cm-30cm respectively on the vertical prestressing casing
Place's gas cutting aperture is set, the first circular hole and the second circular hole are corresponded to；
At first circular hole weld the first short tube, at second circular hole weld the second short tube, first short tube and
Second short tube is connected with the vertical prestressing casing respectively.
5. the two-tube neat note construction of cantilever beam vertical duct mud jacking according to claim 1, which is characterized in that the step
Rapid 300 Specific construction process are as follows: the vertical prestressing casing is set in outside the vertical prestressing bar, and described vertical
The vertical prestressing casing is stretched out at the both ends of presstressed reinforcing steel；
The both ends of the vertical prestressing beam are connected with anchor connection component respectively, and the anchor connection component includes anchoring spiral shell
Female, backing plate and spiral bar；
One end of the spiral bar is fixedly connected with the backing plate, and the central axes of the backing plate and the spiral bar are perpendicular；
Through-hole is offered at the backing plate center, after one end of the vertical prestressing bar sequentially passes through the spiral bar and the through-hole
It is connected with the bolt-nut；The both ends of the vertical prestressing casing be each passed through the spiral bar and with it is described vertical pre-
The backing plate at stress rib both ends leans；
Vertical prestressing is formed after anchor connection component described in the vertical prestressing bar, the vertical prestressing casing and assembling
Beam.
6. the two-tube neat note construction of cantilever beam vertical duct mud jacking according to claim 1, which is characterized in that the step
Rapid 400 Specific construction process are as follows: while being bound to the web reinforcement in cantilever beam, to the vertical prestressing Shu Jinhang
Location and installation；More vertical prestressing beams are in intersecting parallels binding and fixing by the round steel that diameter is 10mm, and by more institutes
Vertical prestressing beam is stated to be welded and fixed with the web reinforcement.
7. the two-tube neat note construction of cantilever beam vertical duct mud jacking according to claim 4, which is characterized in that the step
Rapid 500 Specific construction process are as follows: the vertical prestressing beam of adjacent two is one group, vertical prestressing beam described in every group
Second short tube of two vertical prestressing casing shoes is connected by steel wire tube.
8. the two-tube neat note construction of cantilever beam vertical duct mud jacking according to claim 7, which is characterized in that the step
In rapid 500, in vertical prestressing beam described in every group, first short tube of a vertical prestressing cannula tip is into slurry
Mouthful, first short tube of another vertical prestressing cannula tip is grout outlet.
9. the two-tube neat note construction of cantilever beam vertical duct mud jacking according to claim 1, which is characterized in that the step
Rapid 600 Specific construction process are as follows: one-end tension is carried out to the vertical prestressing bar using centre-hole jack, and uses two
Secondary stretching mode.
10. the two-tube neat note construction of cantilever beam vertical duct mud jacking according to claim 8, which is characterized in that described
The Specific construction process of step 700 are as follows: vertical described in every group using pneumatic mortar machine in 24 hours after the completion of the step 600
Prestressing tendon carries out mud jacking, by the stock inlet into the vertical prestressing casing mud jacking, until the grout outlet emerges
Until underflow and slurry do not sink, then the stock inlet and the grout outlet are blocked.
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| CN114293452A (en) * | 2021-12-29 | 2022-04-08 | 中交第四公路工程局有限公司 | Variable cross-section box girder vertical prestress pore channel sealing element and using method thereof |
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