CN204370315U

CN204370315U - A kind of steel box-girder thrusting slip falls beam servicing unit

Info

Publication number: CN204370315U
Application number: CN201420819679.2U
Authority: CN
Inventors: 张述明; 张才伦; 黄修生
Original assignee: YINGDU BRIDGE STEEL STRUCTURE ENGINEERING Co Ltd
Current assignee: YINGDU BRIDGE STEEL STRUCTURE ENGINEERING Co Ltd
Priority date: 2014-12-22
Filing date: 2014-12-22
Publication date: 2015-06-03
Anticipated expiration: 2024-12-22

Abstract

The utility model belongs to field of bridge construction, be specifically related to a kind of steel box-girder thrusting slip to fall beam servicing unit, this beam servicing unit that falls be installed on last across beam and rear across beam junction, comprise be fixed on last across beam fall beam oil cylinder and after being fixed on one across the bracket of beam, described fall beam oil cylinder be positioned at the downside of bracket lateral extensions, described bracket is connected with the beam oil cylinder that falls, and can abut the beam oil cylinder that falls on the downside of described bracket lateral extensions.The utility model has the beneficial effects such as construction is simple and convenient, efficiency is high, make steel box girder construction installation accurate.

Description

A kind of steel box-girder thrusting slip falls beam servicing unit

Technical field

The utility model belongs to field of bridge construction, is specifically related to a kind of steel box-girder thrusting slip and falls beam servicing unit.

Background technology

The traffic form of modern society's viaduct and overpass bridge is the important means of dredging urban congestion traffic, between bridge pier, the construction and installation of beam are the important stages of pontic construction, in prior art, between pier, beam construction existence rear easily produces error with last across beam junction across beam when the beam that falls is installed, and installation is technical problem not accurately.

For solving the problems of the technologies described above, the applicant provides a kind of steel box-girder thrusting slip to fall beam servicing unit, and this case produces thus.

Utility model content

The purpose of this utility model is to provide a kind of steel box-girder thrusting slip to fall beam servicing unit, to solve the problems of the technologies described above, concrete technical scheme of the present utility model is: a kind of steel box-girder thrusting slip falls beam servicing unit, this beam servicing unit that falls be installed on last across beam and rear across beam junction, comprise be fixed on last across beam fall beam oil cylinder and after being fixed on one across the bracket of beam, described fall beam oil cylinder be positioned at the downside of bracket lateral extensions, described bracket is connected with the beam oil cylinder that falls, and can abut the beam oil cylinder that falls on the downside of described bracket lateral extensions.

The beneficial effects of the utility model: when the lower side compression of bracket lateral extensions falls beam oil cylinder, rear one accurately installs across beam relative to last across beam, construct simple and convenient, efficiency is high, make steel box girder construction install the beneficial effects such as accurate.

Accompanying drawing explanation

Fig. 1 is the utility model steel box-girder thrusting slip construction schematic diagram;

Fig. 2 is the beam assistant apparatus structure schematic diagram that falls.

Detailed description of the invention

A kind of steel box-girder thrusting slip construction method, comprises the steps: 1), block mark mark; 2), benchmark sections is installed; 3), sections front pre-correction in place; 4), surplus cutting; 5), sections accurate adjustment; 6), pad at the bottom of beam; 7), install beam servicing unit; 8) beam that, falls is located; 9), fall Liang Chengqiao.

Above step is specifically unfolded as follows:

Described step 1) is specially: after steel box-girder has been assembled on platform for lining, measure camber, horizontal wall inscription, appearance and size inspection declaration, simultaneously, with total powerstation determination sections axis before lower tire, and top board indulge axis of pitch two ends carry out sample punching point mark, and paint to make and mark clearly, to fall beam datum mark in place as sections.

Described step 2) be specially: by bridge south 35# little pile No. end, install 35-37# successively across interior steel box-girder, the positioning datum of complete steel box-girder as next joint case beam-ends mouth has been located in prostatitis.

Described step 3) is specially: when steel box-girder first pushing tow sections is far away close to theoretical position 3 meters, starts tracking measurement and tentatively rectifies a deviation; Survey station is located on 35# pier, utilizes the axis off normal situation of total station survey pushing tow sections; Because track width is greater than pushing tow piston shoes width, therefore there will be the overall horizontal off normal of sections, if can tentatively finely tune by monolateral pushing tow when lateral deviation is excessive; If when still cannot rectify a deviation smoothly, special razor-edge liner frock can be adopted, wedge shape frock is encased inside track side and fixes with rail beam, more progressively pushing tow is rectified a deviation, rectify a deviation to axis lateral deviation within 1cm by this method; All the other sections are equally according to said method rectified a deviation.

Described step 4) is specially: portion segment port has surplus, surplus need measure cutting according to actual conditions before in place: sections pushing tow is extremely apart from last joint beam section 10cm place, the cutting quantity of steel ruler measurement port surplus is coordinated with total powerstation, measure sections panel length, port gap length, and the distance at below holder base plate and bridge pier pinner center, calculate port cutting quantity, then line is cut surplus and is opened groove processed; Do Special hanging basket protective tooling and be suspended at the bottom of beam during the cutting of base plate surplus, prevent spark from dropping, properly protect in case during the cutting of panel surplus in order to avoid under spark splashes to case beam.

Described step 5) is specially: it is involutory to prosthomere port with the complete 10cm of little running that sections keeps correct attitude to continue, stay seam 6-8mm, again measure axis off normal situation, check collar extension Chu Ge road web misalignment situation simultaneously, the dead in line of sections before and after emphasis ensures, if have partially, adopt gaily decorated basket screw rod to carry out sections laterally fine setting, make that port is involutory meets required precision, deviation controls as far as possible within 5mm; So far, the case back section of pushing away has arrived design plane position, but elevation is still higher than design altitude, needs to reduce beam section height, 4 group oil cylinders synchronously land, stop when being down to the above 10cm of design altitude, now again measure the absolute altitude of sections corner measuring point, utilize 4 groups of jacking cylinders to finely tune, the corner discrepancy in elevation is met the requirements, ensure beam section transverse horizontal, longitudinally coincide with design grade, before beam of guaranteeing to fall, attitude is correct.

Described step 6) is specially: carry out rapidly pad at the bottom of beam after accurate adjustment, pad is arranged on both sides before and after piston shoes, 16 pads are set bottom single-unit beam section, pad must pad and be adjacent to base plate, prevent from piston shoes oil cylinder from removing back rest section to loosen, press said process incremental launching positioning successively across interior 2nd, 3 section, and be welded as entirety, beam to be fallen.

Described step 7) is specially: the beam oil cylinder that falls of single span sections large pile No. end is arranged on the permanent pier of bridge, and each Dun Ding arranges two oil cylinders, is distributed in bearing pad stone both sides; Other end bridge pier is pushed down across beam section by last, beam section directly rides on prosthomere port, and at the bottom of beam between track and base plate insufficient height cannot put into beam oil cylinder, therefore, fall before beam and arrange bracket in top plate port, bracket is arranged on beam section panel and web correspondence position and carries out strengthening measure in case, and bracket is arranged on more than sections panel, laterally corresponding with web position, under bracket, install beam oil cylinder.

Bracket structure designs: the beam bracket that falls is barb type, and be arranged in single span girder segment to be fallen without permanent buttress one end, bracket root and steel box-girder top board are weldingly connected, and arrange 8 altogether along direction across bridge, and bracket web position is corresponding with box girder web.Bracket lower tank web both sides arrange reinforcement gusset, and gusset vertical with bracket is corresponding respectively to strengthen gusset.

Near front end dropping place sections top plate port, arrange beam oil cylinder, laterally 8 difference are corresponding above each web, because bridge floor has 2% horizontal wall inscription, adopt razor-edge liner levelling bottom oil cylinder.Below oil cylinder, web both sides arrange reinforcement gusset, middle one channel beam base plate.

Bracket height 840mm, length 1220mm, width 400mm are i shaped cross section structure.The thick 30mm of web, arc tips shrouding thickness 20mm, frange plate and gusset are 20mm, material Q345B.Bracket web and arc shrouding weld with beam section end face penetration, and all the other gussets weld with twin fillet wolt, welding and assembling height 10mm.Steel box-girder reinforcing rib plate thickness 16mm.

Described step 8) is specially: after installing beam oil cylinder, and the first synchronization of jacking up 5cm of each jacking cylinder, checks hydraulic test operating condition, lay down pad at the bottom of beam, more slowly synchronous decline, and the beam that falls is in place; At the bottom of beam, again add pad after beam section is in place prevents oil cylinder off-load from causing port misalignment, and pad is arranged in support capital position, and collar extension fixed by horse plate rapidly, carries out girth welding; Remove bracket, shed beam servicing unit.

As shown in Figure 1, 2, for a kind of steel box-girder thrusting slip falls beam servicing unit, this beam servicing unit that falls be installed on last across beam 1 and rear across beam 2 junction, comprise be fixed on last across beam 1 fall beam oil cylinder 4 and after being fixed on one across the bracket 3 of beam 2, described fall beam oil cylinder 4 be positioned at the downside of bracket 3 lateral extensions 31, described bracket 3 is connected with the beam oil cylinder 4 that falls, and can abut the beam oil cylinder 4 that falls on the downside of described bracket 3 lateral extensions 31.

The use principle of this beam servicing unit that falls: first install beam oil cylinder 4 and fixedly mount bracket 3 across on beam 2 rear last across on beam 1, wherein said fall beam oil cylinder 4 be positioned at the downside of bracket 3 lateral extensions 31, when after laying one across beam 2 time, rear one falls across beam 2, the downside of bracket 3 lateral extensions 31 abuts beam oil cylinder 4, the beam oil cylinder 4 that falls also synchronously declines, and when the beam oil cylinder 4 that falls touches the end, namely, one also accurately installs across beam 2.

The present embodiment is for explaining that utility model of the present utility model is conceived, but not the restriction to the utility model protection domain, allly does any unsubstantiality to above-described embodiment and changes, and all belongs to protection domain of the present utility model.

Claims

1. a steel box-girder thrusting slip falls beam servicing unit, this beam servicing unit that falls be installed on last across beam and rear across beam junction, it is characterized in that: comprise be fixed on last across beam fall beam oil cylinder and after being fixed on one across the bracket of beam, described fall beam oil cylinder be positioned at the downside of bracket lateral extensions, described bracket is connected with the beam oil cylinder that falls, and can abut the beam oil cylinder that falls on the downside of described bracket lateral extensions.