CN108867402A - A kind of sand cylinder prepressing device and preloading method - Google Patents
A kind of sand cylinder prepressing device and preloading method Download PDFInfo
- Publication number
- CN108867402A CN108867402A CN201811004622.6A CN201811004622A CN108867402A CN 108867402 A CN108867402 A CN 108867402A CN 201811004622 A CN201811004622 A CN 201811004622A CN 108867402 A CN108867402 A CN 108867402A
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- China
- Prior art keywords
- sand cylinder
- supporting plate
- lower supporting
- backup pad
- upper backup
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Presses And Accessory Devices Thereof (AREA)
Abstract
The invention discloses a kind of sand cylinder prepressing device and preloading methods, are related to technical field of bridge construction.The device includes pre- pressure rack, supporting table and pressing device, the pre- pressure rack includes the upper backup pad and lower supporting plate being horizontally spaced about, interval vertical is equipped at least two adjusting rods between the upper backup pad and lower supporting plate, one end of each adjusting rod is connect with the upper backup pad, the other end is connect with the lower supporting plate, the upper backup pad and lower supporting plate can be moved along the length direction of the adjusting rod, and height-adjustable precompressed region is formed with the adjusting rod, the pressing device is located in the precompressed region, the pressing device is for being held on one end face of sand cylinder to compress sand cylinder.Sand cylinder prepressing device provided by the invention and method solve the problems, such as that traditional prepressing device is not suitable for the sand cylinder precompressed of a variety of tonnages, of simple structure and strong practicability.
Description
Technical field
The present invention relates to technical field of bridge construction, and in particular to a kind of sand cylinder prepressing device and preloading method.
Background technique
Currently, mostly using bracket (bracket)+sand cylinder knot during bridge main tower cross beam and steel pipe support in-situ beam casting
Structure auxiliary construction, since sand has certain mobility, structure biggish for primary concreting concrete gravity, sand cylinder
When structure stress is larger, the phenomenon that sand in sand cylinder will appear Compression Settlement after being squeezed by biggish active force.To eliminate
The sedimentation of sand cylinder guarantees the structure safety of bracket (bracket), is using the preceding precompressed that must carry out sand cylinder.Loop wheel machine branch is usually used at present
The methods of leg, press machine and preloading ballast carry out precompressed to sand cylinder, and there is also the pre- pressure racks of sand cylinder, pass through certain one end to sand cylinder
Face acts on the principle of larger extruding force, carries out precompressed to sand cylinder, however the conventional sand tub carrying used in the prior art
Smaller, although easy to operate, and cost is relatively low, for large-tonnage sand cylinder, conventional sand tub there is precompressed insufficient height,
It is unable to satisfy force request, and sand tub height is generally fixed, is often only applicable to the sand cylinder of small range variation tonnage, adaptability
It is poor, and it is time-consuming and laborious to make different sand tub for the sand cylinder of different tonnages, and increases construction cost, does not have practical
Property.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of sand cylinder prepressing device and precompressed sides
The height of method, the precompressed region in device is adjustable, solves traditional prepressing device and is not suitable for the sand cylinder precompressed of a variety of tonnages and asks
Topic, of simple structure and strong practicability.
To achieve the above objectives, the technical solution adopted by the present invention is that：
Pre- pressure rack comprising the upper backup pad and lower supporting plate of horizontal spacing setting, the upper backup pad and lower supporting plate
Between interval vertical be equipped at least two adjusting rods, one end of each adjusting rod connect with the upper backup pad, the other end
It being connect with the lower supporting plate, the upper backup pad and lower supporting plate can be moved along the length direction of the adjusting rod, and
Height-adjustable precompressed region is formed with the adjusting rod；
Supporting table, is located at the lower section of the lower supporting plate, and the supporting table is used to support the pre- pressure rack；
Pressing device is located in the precompressed region, and the pressing device is for being held on one end face of sand cylinder to press
Tight sand cylinder.
Based on the above technical solution, each adjusting rod runs through the upper backup pad and lower supporting plate, often
One adjusting rod, which stretches out on the end of the upper backup pad and lower supporting plate, is all provided with finite place piece, and the locating part is for adjusting
Save the size in the precompressed region.
Based on the above technical solution, the locating part is fastening nut.
Based on the above technical solution, the pressing device is jack.
Based on the above technical solution, symmetrical point of the adjusting rod on the upper backup pad and lower supporting plate
Cloth.
Based on the above technical solution, the supporting table includes that bilateral symmetry is set to the lower supporting plate two sides of the bottom
Column, the height of the column is higher than the height of the locating part.
Based on the above technical solution, leveling steel is equipped between the supporting table and lower supporting plate.
Based on the above technical solution, pressure-bearing steel plate is equipped between the locating part and the upper backup pad, it is described
Pressure-bearing steel plate is equipped between locating part and lower supporting plate, the top and bottom of the pressing device are equipped with pressure-bearing steel plate.
The present invention also provides a kind of sand cylinder preloading methods, carry out precompressed, preloading method to sand cylinder using above-mentioned prepressing device
Including：
The size for adjusting precompressed region, sand cylinder is placed at the top of pressing device, and the sand cylinder is located at the pressing device
Driving trip within the scope of, drive the pressing device, by the sand cylinder compress.
Compared with the prior art, the advantages of the present invention are as follows：
(1) sand cylinder prepressing device provided by the invention, pre- pressure rack include upper backup pad, lower supporting plate and adjusting rod, upper branch
Height-adjustable precompressed region is formed between fagging, lower supporting plate and adjusting rod, sand cylinder and pressing device are placed in precompressed region
Interior, compared to the pre- pressure rack of traditional fixed height, upper backup pad and lower supporting plate on this prepressing device can be with the length of adjusting rod
Degree direction moves up and down, adjustment region area, suitable for the precompressed of the biggish sand cylinder of various tonnages especially large-tonnage volume, fits
It is wide with property, reduce construction cost.
(2) sand cylinder prepressing device provided by the invention, prepressing device is by upper backup pad, lower supporting plate, adjusting rod, supporting table
It is formed with pressing device, various pieces are to be detachably connected, and compared to the non-detachable pre- pressure rack of tradition, the present apparatus is conveniently applied
Space is saved in transport and placement during work, and structure is simple, and operator is facilitated to assemble, practical.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sand cylinder prepressing device in the embodiment of the present invention.
In figure：The pre- pressure rack of 1-, 10- upper backup pad, 11- lower supporting plate, 12- adjusting rod, 13- precompressed region, 14- limit
Part, 2- supporting table, 3- pressing device, 4- level steel, 5- pressure-bearing steel plate, 6- sand cylinder.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
Shown in Figure 1, the embodiment of the present invention provides a kind of sand cylinder prepressing device, including pre- pressure rack 1, and pre- pressure rack 1 includes
The upper backup pad 10 and lower supporting plate 11 of horizontal spacing setting, upper backup pad 10 and lower supporting plate 11 are the length with one fixed width
Square plate, preferably shoulder pole girder, the bottom surface of upper backup pad 10 are corresponding with the top surface of lower supporting plate 11 herein.10 He of upper backup pad
Interval vertical is equipped at least two adjusting rods 12 between lower supporting plate 11, is parallel to each other between adjusting rod 12, each adjusting rod 12
One end connect with upper backup pad 10, the other end is connect with lower supporting plate 11, and upper backup pad 10 and lower supporting plate 11 can edges
The length direction of adjusting rod 12 is mobile, is formed between upper backup pad 10 and lower supporting plate 11 and adjusting rod 12 along 12 length of adjusting rod
The height-adjustable precompressed region 13 in direction.In order to guarantee that the stress balance of upper backup pad 10 and lower supporting plate 11, adjusting rod 12 exist
Symmetrical distribution between upper backup pad 10 and lower supporting plate 11.In order to fix the size in precompressed region 13, each tune here
Pole 12 runs through upper backup pad 10 and lower supporting plate 11, and the part rod segment of wherein one end of each adjusting rod 12 is located at upper support
The top side of plate 10 or the bottom side of lower supporting plate 11, and stretch out in each adjusting rod of upper backup pad 10 and lower supporting plate 11
Finite place piece 14 is all provided on 12 end, locating part 14 is used to adjust the size in precompressed region 13.Locating part 14 can be any
Suitable device, here from the angle of construction cost and operational sequence, locating part 14 is preferably fastening nut.
Shown in Figure 1, prepressing device further includes supporting table 2, and supporting table 2 is located at the lower section of lower supporting plate 11, main to use
In the pre- pressure rack 1 of support.Wherein, it since one end of adjusting rod 12 can stretch out in outside lower supporting plate 11, is gone in order to facilitate the operation of personnel
The adjusting rod 12 for stretching out in lower supporting plate 11 and the locating part 14 positioned at one end are adjusted, the corresponding locating part 14 of supporting table 2 is thrown
The position in shadow zone domain should there are can operating space.Here supporting table 2 is preferably that bilateral symmetry is set to 11 two sides of the bottom of lower supporting plate
Column, column have the cross-sectional area of suitable size, guarantee that it can stablize the pre- pressure rack 1 of support, have and operator is not hindered to align
In the operation of the locating part 14 of lower section.In addition, the height of column is higher than the height of locating part 14, make to stretch out in lower supporting plate 11
Part adjusting rod 12 and locating part 14 set on 12 this end of adjusting rod are in hanging state, guarantee that there are the confessions of enough spaces
Operator goes to operate, structurally reasonable.
Shown in Figure 1, prepressing device further includes pressing device 3, is located in precompressed region 13, in precompressed, sand cylinder 6
Also it is placed in precompressed region 13, pressing device 3 is for being held on 6 one end face of sand cylinder to compress sand cylinder 6.Pressing device 3
It can be any suitable device, as hydraulic pump or jack are pressed here from the angle of construction cost and operational sequence
Tight device 3 is preferably jack, easy to operate.In precompressed, sand cylinder 6 is placed in precompressed region 13, and is located at pressing device 3
Top, drive pressing device 3, sand cylinder 6 rises under the driving of pressing device 3 up to being held in the bottom surface of upper backup pad 10,
Continue to drive pressing device 3, sand cylinder 6 is compressed by resist force, and precompressed is completed.
Further, the ground of 2 lower section of supporting table or plane are often not fully horizontal state, in order to guarantee precompressed
Frame 1 remains horizontality, so that it is horizontal to guarantee that the sand cylinder 6 being placed in precompressed region 13 and pressing device 3 are also at
State is equipped with leveling steel 4 between supporting table 2 and lower supporting plate 11, guarantees pre- pressure rack 1, the level of pressing device 3 and sand cylinder 6, from
And guarantee the quality of 6 precompressed of sand cylinder.
Further, due to prepressing device, in precompressed, active force is larger, in order to meet pre- pressure request, prevents prepressing device
Structure in the preloading process due to concentrating active force excessive and damage, set between locating part 14 and upper backup pad 10
There is pressure-bearing steel plate 5, pressure-bearing steel plate 5 is equipped between locating part 14 and lower supporting plate 11, the top and bottom of pressing device 3 are set
There is pressure-bearing steel plate 5.Pressure-bearing steel plate 5 is well positioned to meet the bearing requirements at each position, and protective device is not damaged.
The embodiment of the invention also provides the preloading methods of sand cylinder, carry out precompressed to sand cylinder 6 using above-mentioned prepressing device,
Preloading method includes：The size in precompressed region 13 needed for being determined first according to the tonnage of the sand cylinder 6 of wanted precompressed adjusts locating part
14 position, adjustment supporting table 2 and leveling steel 4, guarantee that pre- pressure rack 1 is in same level, and sand cylinder 6 is placed by loop wheel machine
In the top of pressing device 3, sand cylinder 6 is located within the scope of the driving trip of pressing device 3, in order to guarantee the quality of precompressed, preferably
, pressing device 3 is placed at the center of lower supporting plate 11, sand cylinder 6 is placed at the top center of pressing device 3.Most
Rear-guard moves pressing device 3, and the height of pressing device 3 increases, and the height in precompressed region 13 is constant, then 6 height of sand cylinder becomes smaller, sand cylinder
6 are compacted under the active force of pressing device 3, until 6 height of sand cylinder no longer has greatly changed, precompressed is completed.
The preloading method of precompressed sand cylinder provided by the invention, it is easy to operate compared to other existing methods, it can basis
The tonnage of sand cylinder 6 adjusts the size in precompressed region 13 in pre- pressure rack 1, practical, and after the completion of the construction, pre- pressure rack 1 can
With disassembly for each components, used convenient for storing or transporting next construction site.In addition, sand cylinder 6 is placed in pressing device 3
Top, the placement for being avoided that each time will also move pressing device 3 process during removing sand cylinder 6 is time saving and energy saving.
The present invention is not only limited to above-mentioned preferred forms, anyone can show that other are each under the inspiration of the present invention
The product of kind form, however, make any variation in its shape or structure, it is all with identical or similar with the present invention
Technical solution, within its protection scope.
Claims (9)
1. a kind of sand cylinder prepressing device, which is characterized in that it includes：
Pre- pressure rack (1) comprising the upper backup pad (10) and lower supporting plate (11) of horizontal spacing setting, the upper backup pad (10)
Interval vertical is equipped at least two adjusting rods (12), one end of each adjusting rod (12) and institute between lower supporting plate (11)
Upper backup pad (10) connection is stated, the other end is connect with the lower supporting plate (11), the upper backup pad (10) and lower supporting plate
(11) can be mobile along the length direction of the adjusting rod (12), and height-adjustable precompressed is formed with the adjusting rod (12)
Region (13)；
Supporting table (2), is located at the lower section of the lower supporting plate (11), and the supporting table (2) is used to support the pre- pressure rack
(1)；
Pressing device (3) is located in the precompressed region (13), and the pressing device (3) is for being held in sand cylinder (6) one end
To compress the sand cylinder (6) on face.
2. a kind of sand cylinder prepressing device as described in claim 1, it is characterised in that：Each adjusting rod (12) runs through institute
Upper backup pad (10) and lower supporting plate (11) are stated, each adjusting rod (12) stretches out in the upper backup pad (10) and lower support
It is all provided on the end of plate (11) finite place piece (14), the locating part (14) is used to adjust the size of the precompressed region (13).
3. a kind of sand cylinder prepressing device as claimed in claim 2, it is characterised in that：The locating part (14) is fastening nut.
4. a kind of sand cylinder prepressing device as claimed in claim 3, it is characterised in that：The pressing device (3) is jack.
5. a kind of sand cylinder prepressing device as claimed in claim 2, it is characterised in that：The upper backup pad (10) and lower supporting plate
(11) adjusting rod (12) symmetrical distribution on.
6. a kind of sand cylinder prepressing device as claimed in claim 5, it is characterised in that：The supporting table (2) includes bilateral symmetry
Column set on the lower supporting plate (11) two sides of the bottom, the height of the column are higher than the height of the locating part (14).
7. a kind of sand cylinder prepressing device as claimed in claim 6, it is characterised in that：The supporting table (2) and lower supporting plate
(11) leveling steel (4) is equipped between.
8. a kind of sand cylinder prepressing device as claimed in claim 7, it is characterised in that：The locating part (14) and the upper support
Pressure-bearing steel plate (5) are equipped between plate (10), are equipped with pressure-bearing steel plate (5) between the locating part (14) and lower supporting plate (11), institute
The top and bottom for stating pressing device (3) are equipped with pressure-bearing steel plate (5).
9. a kind of sand cylinder preloading method, which is characterized in that using prepressing device described in any item of the claim 1 to 8 to sand
Cylinder carries out precompressed, and the preloading method includes：
Sand cylinder (6) is placed at the top of pressing device (3) by the size for adjusting precompressed region (13), and the sand cylinder (6) is located at described
Within the scope of the driving trip of pressing device (3), the pressing device (3) are driven, the sand cylinder (6) is compressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004622.6A CN108867402A (en) | 2018-08-30 | 2018-08-30 | A kind of sand cylinder prepressing device and preloading method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811004622.6A CN108867402A (en) | 2018-08-30 | 2018-08-30 | A kind of sand cylinder prepressing device and preloading method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108867402A true CN108867402A (en) | 2018-11-23 |
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ID=64322629
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811004622.6A Pending CN108867402A (en) | 2018-08-30 | 2018-08-30 | A kind of sand cylinder prepressing device and preloading method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080356A (en) * | 2010-12-17 | 2011-06-01 | 中铁大桥局集团第四工程有限公司 | Box girder positioning temporary supporting seat and positioning construction method of box girder |
| CN204000633U (en) * | 2014-08-14 | 2014-12-10 | 中铁二十局集团第五工程有限公司 | A kind of sandbox detachable precompressed reaction frame for precompressed |
| CN204000632U (en) * | 2014-08-14 | 2014-12-10 | 中铁二十局集团第五工程有限公司 | A kind of sandbox prepressing device based on reaction frame |
| CN205857040U (en) * | 2016-08-08 | 2017-01-04 | 中铁二局集团有限公司 | A kind of for the device to temporary support precompressed |
| CN207525625U (en) * | 2017-09-22 | 2018-06-22 | 中铁第五勘察设计院集团有限公司 | Sandbox preformer |
-
2018
- 2018-08-30 CN CN201811004622.6A patent/CN108867402A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080356A (en) * | 2010-12-17 | 2011-06-01 | 中铁大桥局集团第四工程有限公司 | Box girder positioning temporary supporting seat and positioning construction method of box girder |
| CN204000633U (en) * | 2014-08-14 | 2014-12-10 | 中铁二十局集团第五工程有限公司 | A kind of sandbox detachable precompressed reaction frame for precompressed |
| CN204000632U (en) * | 2014-08-14 | 2014-12-10 | 中铁二十局集团第五工程有限公司 | A kind of sandbox prepressing device based on reaction frame |
| CN205857040U (en) * | 2016-08-08 | 2017-01-04 | 中铁二局集团有限公司 | A kind of for the device to temporary support precompressed |
| CN207525625U (en) * | 2017-09-22 | 2018-06-22 | 中铁第五勘察设计院集团有限公司 | Sandbox preformer |
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