CN104963293A - Anchoring method for grouting and anchoring reinforcing steel bar in corrugated pipe to anchor precast segmental beam and parking area stiffening strut - Google Patents

Abstract

The invention provides an anchoring method for grouting and anchoring a reinforcing steel bar in a corrugated pipe to anchor a precast segmental beam and a parking area stiffening strut. The method comprises the following steps of pre-embedding the corrugated pipe in the segmental beam precasting process; inserting the anchored reinforcing steel bar into the corrugated pipe after the segmental beam is demolded; and casting the stiffening strut after the anchored reinforcing steel bar and the corrugated pipe are grouted and anchored. According to the invention, through applying the reinforcing steel bar anchoring method to a special structure in bridge precast construction, the traditional production process and template do not need to be changed; it is only required to pre-embed the corrugated pipe in the continuously production process; the process is simple while performing the construction of the stiffening strut in the later stage; the anchoring performance is reliable due to the use of non-shrinkage and high-strength grouting materials; and the construction progress is furthest accelerated on the premise of ensuring the construction quality.

Description

Precast segmental beam lay-by is put more energy into and is supportted bellows slurry anchor Bar Anchorage method

Technical field

The present invention relates to reinforced concrete prefabricated structure reinforcing bars anchoring field, particularly relate to a kind of precast segmental beam lay-by and to put more energy into support bellows slurry anchor Bar Anchorage method.

Background technology

The application of precast concrete segment beam technology in bridge engineering is very extensive, and short-term and long line method prefabricated subsection beam process are also tending towards ripe.Beam sections lay-by is arranged to be chosen arm and to put more energy into support structure, beam sections is had in the Urban Bridge engineering selection of more planning space and structure design.Support of putting more energy into roughly has 3 kinds of modes with the anchor connection of beam sections: embedded sleeve barrel is connected anchoring; Steel, mixed combination anchor and plant anchor.But these anchorage styles cannot meet the continuous seepage of beam sections when putting more energy into support element precast, at the bottom of the prefabricated construction feasibility of privileged sites, large to the loss of template, quality control difficulty is very big.Pre-buried oblique sleeve location difficulty and angle can not adjust; Steel, mixed combination anchor require high to steel, welding and corrosion-resistant and interface anchoring difficult; Plant anchor boring difficulty and reinforcing bar insert after the short time cannot colligation adjust to the right place.

Summary of the invention

Object of the present invention is exactly a kind of method providing bellows entoplasm anchor Bar Anchorage for the construction of privileged sites in bridge prefabrication engineering.In the lay-by prefabricated anchoring application of support of putting more energy into, this technology has that constructing operation is simple, anchoring property reliable, can ensure the advantages such as prefabricated continuous seepage without the need to reequiping model.

Object of the present invention realizes by following scheme: a kind of precast segmental beam lay-by is put more energy into and supportted bellows slurry anchor Bar Anchorage method, and its concrete technology step is as follows:

In step one, beam sections reinforcing bar binding process, put more energy at every root and support the pre-buried bellows in anchor bar position and grouting escape pipe.Bellows Length should meet design anchorage length of steel bar, and bellows diameter should meet the space requirement of anchor bar slurry anchor, and pre-buried escape pipe need support the use with bellows, and bellows utilizes network for location to locate, and shutoff is carried out at bellows two ends, prevents into slurry;

After step 2, beam sections bale handle to support construction area of putting more energy into, cut web outside corrugated pipe orifice concrete, and clear up bellows inwall;

Step 3, support anchor bar of putting more energy into penetrate in bellows, put more energy into shown in colligation drawing after arriving design attitude support stirrup and lay-by bridge deck reinforcing bar;

Step 4, the support and after the whole colligation of lay-by bridge deck reinforcing bar fixedly completes of putting more energy into, the bellows mouth of pipe penetrating anchor bar is carried out shutoff, installs inlet pipe in shutoff process, inlet pipe need be installed firmly seamless;

Step 5, by design mixture proportion stir grouting material, grouting material stir carry out in strict accordance with constructure scheme, degree of mobilization need meet design requirement;

Step 6, utilize pneumatic mortar machine to be in the milk in bellows, pneumatic mortar machine Stress control is in designing requirement, and slurry holds pressure 10s after filling pipeline, when confirming that pulp concentration is consistent with entering to starch concentration, carry out closed pressurize;

Carry out after step 7, slurry reach design strength putting more energy into support and lay-by bridge deck formwork erection, build.

The beneficial effect adopting technique scheme to produce is: Bar Anchorage method is applied in bridge prefabrication engineering special construction by the present invention, without the need to changing original production technology and template, pre-buried bellows is only needed in continuous flow procedure, when later stage carries out putting more energy into support construction, technique is simple, use ungauged regions high strength grout anchoring property reliable, under the prerequisite ensureing construction quality, accelerate construction speed to greatest extent.

Claims (1)

1. precast segmental beam lay-by is put more energy into and is supportted a bellows slurry anchor Bar Anchorage method, and its concrete technology step is as follows:

In step one, beam sections reinforcing bar binding process, put more energy at every root and support the pre-buried bellows in anchor bar position and grouting escape pipe, Bellows Length should meet design anchorage length of steel bar, bellows diameter should meet the space requirement of anchor bar slurry anchor, pre-buried escape pipe need support the use with bellows, bellows utilizes network for location to locate, and shutoff is carried out at bellows two ends, prevents into slurry;

After step 2, beam sections bale handle to support construction area of putting more energy into, cut web outside corrugated pipe orifice concrete, and clear up bellows inwall;

Step 3, support anchor bar of putting more energy into penetrate in bellows, put more energy into shown in colligation drawing after arriving design attitude support stirrup and lay-by bridge deck reinforcing bar;

Step 4, the support and after the whole colligation of lay-by bridge deck reinforcing bar fixedly completes of putting more energy into, the bellows mouth of pipe penetrating anchor bar is carried out shutoff, installs inlet pipe in shutoff process, inlet pipe need be installed firmly seamless;

Step 5, by design mixture proportion stir grouting material, grouting material stir carry out in strict accordance with constructure scheme, degree of mobilization need meet design requirement;

Step 6, utilize pneumatic mortar machine to be in the milk in bellows, pneumatic mortar machine Stress control is in designing requirement, and slurry holds pressure 10s after filling pipeline, when confirming that pulp concentration is consistent with entering to starch concentration, carry out closed pressurize;

Carry out after step 7, slurry reach design strength putting more energy into support and lay-by bridge deck formwork erection, build.