CN101231208A - Method of testing hanging-filling beam suspension basket and bracket equivalent load - Google Patents

Method of testing hanging-filling beam suspension basket and bracket equivalent load Download PDF

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Publication number
CN101231208A
CN101231208A CNA2008100503965A CN200810050396A CN101231208A CN 101231208 A CN101231208 A CN 101231208A CN A2008100503965 A CNA2008100503965 A CN A2008100503965A CN 200810050396 A CN200810050396 A CN 200810050396A CN 101231208 A CN101231208 A CN 101231208A
Authority
CN
China
Prior art keywords
main truss
hanging basket
truss cradle
load
cradle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2008100503965A
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Chinese (zh)
Inventor
李继英
王涛
秦国刚
白国艳
游春颖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway 13th Bureau Group Co Ltd
Original Assignee
China Railway 13th Bureau Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Railway 13th Bureau Group Co Ltd filed Critical China Railway 13th Bureau Group Co Ltd
Priority to CNA2008100503965A priority Critical patent/CN101231208A/en
Publication of CN101231208A publication Critical patent/CN101231208A/en
Pending legal-status Critical Current

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Abstract

The invention provides an equivalent load test method of a hanging basket and a bracket of a free cantilever casting girder, and relates to the improvement of a test method of building a road bridge and a railroad bridge. The method has the steps that: firstly, a rest pier is put at the middle part of the main trussed beams of the hanging basket, two main trussed beams of the hanging basket are arranged symmetrically; secondly, a deformed steel bar is used as an anchor arm at the rear end of the main trussed beams of the hanging basket to lock the main trussed beams of the hanging basket, a pull rod penetrates the front end of the hanging basket, one end of the pull rod is locked, and the other end is arranged on a hydrostatic trigger; thirdly, the opposite pulling is performed, and the test detection is performed according to 1.2 times of the load of the main trussed beams of the hanging basket; fourthly, after reaching 1.2 times of the load of the hanging basket, the test detection is stopped for a hour, and then load is discharged progressively; fifth, all parts of the hanging basket are examined strictly; sixth, the load detection can be performed again if the situation is normal. The invention has the advantages of simple structure, convenient operation, accurate detection, and economy and practicality; the obtained number is exact, the method is simple and easy, and the construction requirement can be fully satisfied.

Description

Hanging-filling beam suspension basket and carriage equivalence load test method
Technical field
The present invention relates to a kind of improvement of building public affairs, railroad bridge test method.
Background technology
Bridge span is in 60m~200m scope, its construction method adopts the construction of cantilever instillation process basically, be called for short the outstanding beam of irritating, outstanding equipment of irritating the beam construction is 0# section carriage and the outstanding Hanging Basket of irritating, and carriage and Hanging Basket are being controlled safety, quality and the construction speed of outstanding filling beam, therefore, highway and railroad bridge job specifications have strict specific requirement to carriage and Hanging Basket, simultaneously, relevant designing institute has proposed concrete technical indicator and test detection requirement to carriage and Hanging Basket in the Xuan Guanliang design drawing.After method for testing and detecting commonly used at present is carriage and Hanging Basket installation in position, use precompressed in kind, concrete material object is taken sand pocket, earth bag, water bag, water tank etc., and this method looks intuitively, can reach construction Supervision slip-stick artist's approval.But there are many defectives in this carriage, the Hanging Basket detection method that generally adopts, the one, and not accurate enough, be example with the sand pocket: 150 tons beam section, weigh 1.2 by the beam section and extraordinarily carry and need 180 tons, outstanding Guan Liang two ends need 1.2 ten thousand sand pockets altogether, are difficult to guarantee accurate measurement; The 2nd, volume in kind is big, in the finite space of Xuan Guanliang section, can not put by the actual forced status of carriage and Hanging Basket, and therefore, member stress is inaccurate; The 3rd, exhaust the people and drain the treasury, the used volume in kind of precompressed is big, consume a certain amount of goods and materials; The 4th, delay the duration, the precompressed cycle respectively accounts for seven day time on carriage and Hanging Basket, prolonged the duration virtually.
Summary of the invention
The objective of the invention is:
Provide a kind of and replace the hanging-filling beam suspension basket of precompressed in kind and carriage equivalence load test method with Hydraulic Power Transmission System, it can solve existing carriage, Hanging Basket detects and has the problem that metering is not accurate enough, member stress is inaccurate, will consume a certain amount of goods and materials and delay the duration.
Technical scheme of the present invention is:
1, a Pin main truss cradle beam 8 horizontal pendulums are put into through on the case-hardened level land, buttress 11 is placed on main truss cradle beam 8 centre positions, another Pin main truss cradle beam 8 is placed on the opposite side of buttress 11 again, two main truss cradle beams 8 are symmetrical arranged;
2, do anchor pole 7 with the locking of two Pin main truss cradle beams 8 in the rear end with screw-thread steel, seal in pull bar 6 at the front end of two Pin main truss cradle beams 8, the end locking of pull bar 6, the other end of pull bar 6 is installed on the hydraulic jack 5 (demarcating YC70 lifting jack accurately);
3, carry out drawing: test detection according to 1.2 times of main truss cradle beam 8 capacity values, utilization hydraulic jack 5 slowly loads, and loads step by step by 1/10th of main truss cradle beam 8 capacity values, until 1.2 times of main truss cradle beam 8 loads;
4, after 1.2 multiple value of arrival main truss cradle beam 8 capacity values, stop 1 hour, afterwards unloading step by step again;
5, all sites to the welding of main truss cradle beam 8 members, bolt, bearing pin endures strict scrutiny;
6, normal as situation, once load detection again, draw the changing value of a L3, back anchor point L1, intermediate supports point L2 before the measurement, try to achieve load deflection value Δ L=Δ L1-| Δ L2|-| Δ L3| at different levels, draw the linear graph of main truss cradle beam stress and distortion, the Hanging Basket downwarp value of obtaining each beam section gets final product.
Advantage of the present invention is:
That test unit of the present invention has is simple in structure, easy to operate, detect accurate and economical and practical advantage, adopt method of the present invention to use the carriage and the Hanging Basket of eight bridges that equivalent load testing machine do not wait span to test detection, the numeral that obtains accurately, method is simple, can satisfy construction requirement fully.Wherein, use equivalent load test method of the present invention that the carriage and the Hanging Basket of Yuhuai Railway Wujiang River bridge are tested detection, save 20 days construction periods, save 120,000 yuan altogether of every fee of material, expenses of labour, mechanical stage student contributions pooled to pay for class activities.
Description of drawings
Fig. 1 is the one-piece construction synoptic diagram of test unit of the present invention;
Fig. 2 is that test unit of the present invention and triangle main truss are hung blue syndeton synoptic diagram;
Fig. 3 is that test unit of the present invention and rhombus main truss are hung blue syndeton synoptic diagram;
Fig. 4 is that test unit of the present invention and shellfish thunder beam main truss are hung blue syndeton synoptic diagram;
Fig. 5 is the syndeton synoptic diagram of test unit of the present invention and carriage.
Embodiment
Embodiment 1
The test unit of (referring to Fig. 1) present embodiment is made up of hydraulic pump 1, control valve 2, tensimeter 3, hydraulic oil pipe 4 and hydraulic jack 5, hydraulic oil pipe 4 is the rubber high-pressure oil pipe, tensimeter 3 is connected with hydraulic oil pipe 4, the inlet end of control valve 2 is fixedlyed connected with the output terminal of hydraulic pump 1, the endpiece of control valve 2 is connected with the lower end of hydraulic oil pipe 4, hydraulic jack 5 is fixed on the upper end of hydraulic oil pipe 4, and hydraulic oil pipe 4 is connected with the oil circuit of hydraulic jack 5.Hydraulic jack 5 is the YC70 lifting jack.
The main truss cradle beam 8 of (referring to Fig. 2) present embodiment is that the triangle main truss is hung indigo plant, the rhombus main truss hangs indigo plant or shellfish thunder beam main truss is hung blue.One, a Pin main truss cradle beam 8 horizontal pendulums are put into through on the case-hardened level land, buttress 11 is placed on the centre position on main truss cradle beam 8 tops, another Pin main truss cradle beam 8 is placed on the opposite of buttress 11 again, two relative main truss cradle beams 8 are symmetrical arranged; Two, in the rear end with smart rail screw-thread steel 7 with the locking of two Pin main truss cradle beams 8, seal in pull bar 6 at the front end of two Pin main truss cradle beams 8, the end locking of pull bar 6, the other end of pull bar 6 is installed on the hydraulic jack 5 (demarcating YC70 lifting jack accurately); Three, carry out drawing: test detection according to 1.2 times of main truss cradle beam 8 capacity values, utilization hydraulic jack 5 slowly loads, and loads step by step by 1/10th of main truss cradle beam 8 capacity values, until 1.2 times of main truss cradle beam 8 loads; Four, after 1.2 multiple value of arrival main truss cradle beam 8 capacity values, stop 1 hour, afterwards unloading step by step again; Five, all sites to the welding of main truss cradle beam 8 members, bolt, bearing pin endures strict scrutiny; Six, normal as situation, once load detection again, draw the changing value of a L3, back anchor point L1, intermediate supports point L2 before the measurement, try to achieve load deflection value Δ L=Δ L1-| Δ L2|-| Δ L3| at different levels, draw the linear graph that Hanging Basket is stressed and be out of shape, the Hanging Basket downwarp value of obtaining each beam section gets final product.
The equivalent load test method of (referring to Fig. 5) present embodiment carriage realizes according to the following steps: one, an end of carriage 12 is connected with the upper end of pull bar 6, is fixedlyed connected with earth anchor 9 by connector 10 in the lower end of pull bar 6; Two, hydraulic jack 5 (demarcating YC70 lifting jack accurately) is installed, and carries out temporary fixed hydraulic jack 5 and carriage 12; Three, utilization hydraulic jack 5 pairs of pull bars 6 slowly load, and carry out step by step by 1/10th of carriage 12 capacity values, until 1.2 times of carriage 12 capacity values; Four, after 1.2 multiple value of arrival carriage 12 capacity values, stop 1 hour, afterwards unloading step by step again; Five, the connection situation of the weld seam of inspection carriage 12 upper lever, bolt, bearing pin; If six connection situations are normal, carry out load test again one time, the stress deformation value of measuring carriage 12 gets final product.
Embodiment 2
(referring to Fig. 3) present embodiment to as if the rhombus main truss hang blue.Embodiment is identical with embodiment 1.
Embodiment 3
(referring to Fig. 4) present embodiment to as if shellfish thunder beam main truss hang blue.Embodiment is identical with embodiment 1.

Claims (1)

1. hanging-filling beam suspension basket and carriage equivalence load test method, its method is:
A, a Pin main truss cradle beam horizontal pendulum is put into through on the case-hardened level land, buttress is placed on main truss cradle beam centre position, another Pin main truss cradle beam is placed on the opposite side of buttress again, two main truss cradle beams are symmetrical arranged;
B, do anchor pole in the rear end with screw-thread steel two Pin main truss cradle beams are locked, seal in pull bar at the front end of two Pin main truss cradle beams, the end locking of pull bar, the other end of pull bar is installed on the hydraulic jack;
C, carry out drawing: test detection according to 1.2 times of main truss cradle beam capacity value, the utilization hydraulic jack slowly loads, and loads step by step by 1/10th of main truss cradle beam capacity value, until 1.2 times of main truss cradle beam load;
After 1.2 multiple value of d, arrival main truss cradle beam capacity value, stop 1 hour, afterwards unloading step by step again;
The all sites of e, the welding to the main truss cradle beam, bolt, bearing pin endures strict scrutiny;
F, normal as situation, once load detection again, draw the changing value of a L3, back anchor point L1, intermediate supports point L2 before the measurement, try to achieve load deflection value Δ L=Δ L1-| Δ L2|-| Δ L3| at different levels, draw the linear graph of main truss cradle beam stress and distortion, the Hanging Basket downwarp value of obtaining each beam section gets final product.
CNA2008100503965A 2008-02-27 2008-02-27 Method of testing hanging-filling beam suspension basket and bracket equivalent load Pending CN101231208A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100503965A CN101231208A (en) 2008-02-27 2008-02-27 Method of testing hanging-filling beam suspension basket and bracket equivalent load

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100503965A CN101231208A (en) 2008-02-27 2008-02-27 Method of testing hanging-filling beam suspension basket and bracket equivalent load

Publications (1)

Publication Number Publication Date
CN101231208A true CN101231208A (en) 2008-07-30

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102012313A (en) * 2010-10-29 2011-04-13 中国一冶集团有限公司 Method for carrying out load test on bridge support frame by prefabricated parts moved through tractive walking
CN102051858A (en) * 2010-12-08 2011-05-11 四川路航建设工程有限责任公司 Jack loading triangular truss hanging basket and load test construction method thereof
CN102494907A (en) * 2011-11-16 2012-06-13 中铁三局集团有限公司 Static load test method for in-situ hanging basket
CN103048198A (en) * 2012-12-27 2013-04-17 中铁港航局集团有限公司 Load test method for rhombus hanging basket
CN103174097A (en) * 2013-04-11 2013-06-26 新疆北新路桥集团股份有限公司 Supporting pre-stress back tension loading and pre-pressing method for upper steel structure of large-span bridge
CN103526698A (en) * 2013-11-07 2014-01-22 天津城建大学 Cast-in-cantilever construction 0# block concrete supporting system and construction method
CN107167289A (en) * 2017-05-17 2017-09-15 上海应用技术大学 A kind of great cantilever precast assembly bent cap load test method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102012313A (en) * 2010-10-29 2011-04-13 中国一冶集团有限公司 Method for carrying out load test on bridge support frame by prefabricated parts moved through tractive walking
CN102012313B (en) * 2010-10-29 2012-01-25 中国一冶集团有限公司 Method for carrying out load test on bridge support frame by prefabricated parts moved through tractive walking
CN102051858A (en) * 2010-12-08 2011-05-11 四川路航建设工程有限责任公司 Jack loading triangular truss hanging basket and load test construction method thereof
CN102051858B (en) * 2010-12-08 2012-05-23 四川路航建设工程有限责任公司 Jack loading triangular truss hanging basket and load test construction method thereof
CN102494907A (en) * 2011-11-16 2012-06-13 中铁三局集团有限公司 Static load test method for in-situ hanging basket
CN103048198A (en) * 2012-12-27 2013-04-17 中铁港航局集团有限公司 Load test method for rhombus hanging basket
CN103174097A (en) * 2013-04-11 2013-06-26 新疆北新路桥集团股份有限公司 Supporting pre-stress back tension loading and pre-pressing method for upper steel structure of large-span bridge
CN103526698A (en) * 2013-11-07 2014-01-22 天津城建大学 Cast-in-cantilever construction 0# block concrete supporting system and construction method
CN103526698B (en) * 2013-11-07 2015-06-24 天津城建大学 Cast-in-cantilever construction 0# block concrete supporting system and construction method
CN107167289A (en) * 2017-05-17 2017-09-15 上海应用技术大学 A kind of great cantilever precast assembly bent cap load test method

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Open date: 20080730

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