阅读说明：本技术 一种整体式桥梁跨中由单幅变双幅架梁施工方法 (construction method for changing single-width into double-width beam erection of integral bridge span ) 是由 何岩 刘阳阳 李伟 田加奇 龙祖蕴 李金成 杨凯旋 庾艺凡 李�杰 高帅 于 2019-08-05 设计创作，主要内容包括：本发明提供了一种整体式桥梁跨中由单幅变双幅架梁施工方法,与传统的单幅架梁相比,本发明的施工工法可以提高架梁的安装速度,同时还可以节省后续桥面系施工大量的施工时间以及可以提供桥面系足够大的作业面,方便了后续工序的施工。与传统的单幅梁板安装相比,本发明可以节省机械和人工的费用,创造巨大的施工效益。(compared with the traditional single-width beam erection, the construction method can improve the mounting speed of the beam erection, simultaneously save a large amount of construction time for subsequent bridge deck construction, provide a large enough operation surface for the bridge deck and facilitate the construction of subsequent procedures. Compared with the traditional single-width beam slab installation, the invention can save the cost of machinery and labor and create huge construction benefits.)

1. a construction method for changing single-width into double-width beam erection in an integral bridge span is characterized by comprising the following steps:

s1: firstly, pre-burying treatment of an embedded part is carried out on a construction bent cap;

S2: after the embedded part embedding treatment is finished, the reinforcing steel bars and the templates are installed;

S3: after the reinforcing steel bars and the templates are installed, installing the Bailey beam;

S4: after the Bailey beam is installed, installing a support leg rail in the bridge girder erection machine;

s5: after the installation of the support leg rail in the bridge girder erection machine is finished, firstly, the bridge girder erection machine is transversely moved, and then a beam plate is installed;

s6: after the beam slab is installed, the bridge girder erection machine moves forwards to pass through the holes, and then the temporary Bailey beam is dismantled and the temporary buttress is broken.

2. the construction method of the integral bridge span by the single-width to double-width frame beam according to claim 1, wherein the step S1 further comprises the following steps:

A1: firstly, determining the distance between temporary buttresses, the self weight of an installation beam body and the construction load of a bridge girder erection machine;

A2: through the step A1, the embedded part is embedded in the gap of the temporary buttress, and the embedded part is prevented from colliding with the support cushion on the top of the cover beam.

3. The construction method of the integral bridge span by the single-width to double-width frame beam according to claim 1, wherein the step S2 further comprises the following steps:

B1, designing six phi 20 deformed steel bar embedded bars in the capping beam vertically in each temporary buttress, wherein the embedded length is 100 cm;

b2: and the height of the vertical mold of the temporary buttress is based on the high side stop block, so that the top elevation of the temporary buttress is kept horizontal.

4. The construction method of the integral bridge span by the single-width to double-width frame beam according to claim 1, wherein the step S3 further comprises the following steps:

c1: firstly, arranging connecting flower stands, wherein the distance between the connecting flower stands is 45cm multiplied by 45cm, and then transversely arranging 5 pieces of Bailey on the connecting flower stands;

c2: after the setting in the step C1, the longitudinal connecting flower stand is connected with the Bailey sheet through bolts by using L10 angle steel;

c3: bamboo plywood with the thickness of 1.8cm is placed on the contact surface of the Bailey beam and the temporary buttress, so that the foundation is stressed more uniformly.

5. The construction method of the integral bridge span by the single-width to double-width frame beam according to claim 1, wherein the step S4 further comprises the following steps:

d1: after the Bailey beam is installed, the Bailey beam and the temporary buttress are subjected to temporary welding and anchoring through the embedded steel bars;

D2: and D1, fixedly mounting the support leg rail in the bridge girder erection machine at the upper end of the Bailey beam by welding and anchoring.

6. The construction method of the integral bridge span by the single-width to double-width frame beam according to claim 1, wherein the step S5 further comprises the following steps:

E1: firstly, closing a left main bridge hanging basket, and then, carrying out hole passing by a bridge girder erection machine;

E2: the left and right center leg rails are then installed to be connected as a unit while ensuring the horizontal placement of the rails, via step E1.

7. the construction method of the integral bridge span by the single-width to double-width frame beam according to claim 1, wherein the step S6 further comprises the following steps:

F1: after the beam plate is installed, the bridge girder erection machine moves forwards to pass through the hole;

F2: after step F1, the temporary beret beam is removed and the temporary pier is broken.

Technical Field

the invention relates to the field of bridge construction, in particular to a construction method for changing a single-amplitude beam into a double-amplitude beam in an integral bridge span.

Background

in bridge construction, generally, the installation of beam plates of an integral bridge is basically carried out by simultaneously erecting two beams. Compared with the situation that after a single frame is erected, the frame erecting machine returns to carry out another frame again, the construction time (the time of the procedures of passing through holes of the frame erecting machine, transferring the frame erecting machine and the like) for installing the beam plates can be greatly shortened. Meanwhile, for the construction of the upper structure, the double-width beam is more favorable for the propulsion of the whole forward construction, so that the templates, various construction machines and materials are prevented from being repeatedly transported again in the later period. However, in many cases, since some critical lines in the middle of the bridge are cut off, only a single frame beam is allowed, which greatly affects the overall construction progress. The middle part of the bridge span is changed from single-width erection to double-width erection, so that the construction efficiency of beam slab installation can be greatly improved, and a favorable working surface is provided for the subsequent process construction.

Disclosure of Invention

In order to solve the problems, the invention provides a construction method for changing a single-width frame beam into a double-width frame beam in an integral bridge span.

in order to realize the technical purpose, the technical scheme of the invention is as follows: a construction method for changing single-width into double-width beam erection in an integral bridge span is characterized by comprising the following steps:

s1: firstly, pre-burying treatment of an embedded part is carried out on a construction bent cap;

S2: after the embedded part embedding treatment is finished, the reinforcing steel bars and the templates are installed;

S3: after the reinforcing steel bars and the templates are installed, installing the Bailey beam;

s4: after the Bailey beam is installed, installing a support leg rail in the bridge girder erection machine;

S5: after the installation of the support leg rail in the bridge girder erection machine is finished, firstly, the bridge girder erection machine is transversely moved, and then a beam plate is installed;

S6: after the beam slab is installed, the bridge girder erection machine moves forwards to pass through the holes, and then the temporary Bailey beam is dismantled and the temporary buttress is broken.

the method has the advantages that the method can improve the mounting speed of the girder erection, simultaneously save a large amount of construction time for subsequent bridge deck construction, provide a large enough working surface for the bridge deck, and facilitate the construction of subsequent procedures. Compared with the traditional single-width beam slab installation, the method can save the cost of machinery and labor and create huge construction benefits.

In a preferred embodiment of the present invention, on the basis of the foregoing, the step S1 further includes the following steps:

a1: firstly, determining the distance between temporary buttresses, the self weight of an installation beam body and the construction load of a bridge girder erection machine;

a2: through the step A1, the embedded part is embedded in the gap of the temporary buttress, and the embedded part is prevented from colliding with the support cushion on the top of the cover beam.

Further, the step S2 further includes the following steps:

B1, designing six phi 20 deformed steel bar embedded bars in the capping beam vertically in each temporary buttress, wherein the embedded length is 100 cm;

b2: and the height of the vertical mold of the temporary buttress is based on the high side stop block, so that the top elevation of the temporary buttress is kept horizontal.

further, the step S3 further includes the following steps:

c1: firstly, arranging connecting flower stands, wherein the distance between the connecting flower stands is 45cm multiplied by 45cm, and then transversely arranging 5 pieces of Bailey on the connecting flower stands;

C2: after the setting in the step C1, the longitudinal connecting flower stand is connected with the Bailey sheet through bolts by using L10 angle steel;

c3: bamboo plywood with the thickness of 1.8cm is placed on the contact surface of the Bailey beam and the temporary buttress, so that the foundation is stressed more uniformly.

further, the step S4 further includes the following steps:

D1: after the Bailey beam is installed, the Bailey beam and the temporary buttress are subjected to temporary welding and anchoring through the embedded steel bars;

d2: and D1, fixedly mounting the support leg rail in the bridge girder erection machine at the upper end of the Bailey beam by welding and anchoring.

Further, the step S5 further includes the following steps:

e1: firstly, closing a left main bridge hanging basket, and then, carrying out hole passing by a bridge girder erection machine;

E2: the left and right center leg rails are then installed to be connected as a unit while ensuring the horizontal placement of the rails, via step E1.

further, the step S6 further includes the following steps:

F1: after the beam plate is installed, the bridge girder erection machine moves forwards to pass through the hole;

F2: after step F1, the temporary beret beam is removed and the temporary pier is broken.

Drawings

FIG. 1 is a process flow diagram of a construction method of an integral bridge span from a single-width frame girder to a double-width frame girder.

Detailed Description

the technical solution of the present invention will be clearly and completely described below.

In order to solve the problems, the invention provides a construction method for changing a single-width frame beam into a double-width frame beam in an integral bridge span.

In order to realize the technical purpose, the technical scheme of the invention is as follows: a construction method for changing single-width into double-width beam erection in an integral bridge span is characterized by comprising the following steps:

S1: firstly, pre-burying treatment of an embedded part is carried out on a construction bent cap;

s2: after the embedded part embedding treatment is finished, the reinforcing steel bars and the templates are installed;

s3: after the reinforcing steel bars and the templates are installed, installing the Bailey beam;

S4: after the Bailey beam is installed, installing a support leg rail in the bridge girder erection machine;

S5: after the installation of the support leg rail in the bridge girder erection machine is finished, firstly, the bridge girder erection machine is transversely moved, and then a beam plate is installed;

s6: after the beam slab is installed, the bridge girder erection machine moves forwards to pass through the holes, and then the temporary Bailey beam is dismantled and the temporary buttress is broken.

the method has the advantages that the method can improve the mounting speed of the girder erection, simultaneously save a large amount of construction time for subsequent bridge deck construction, provide a large enough working surface for the bridge deck, and facilitate the construction of subsequent procedures. Compared with the traditional single-width beam slab installation, the method can save the cost of machinery and labor and create huge construction benefits.

In a preferred embodiment of the present invention, on the basis of the foregoing, the step S1 further includes the following steps:

a1: firstly, determining the distance between temporary buttresses, the self weight of an installation beam body and the construction load of a bridge girder erection machine;

a2: through the step A1, the embedded part is embedded in the gap of the temporary buttress, and the embedded part is prevented from colliding with the support cushion on the top of the cover beam.

in actual operation, because the cover beam is pre-buried, the positions of the pre-buried parts and the temporary buttresses need to be fully considered in design, and the pre-buried parts are prevented from colliding with the support cushion on the top of the cover beam. Meanwhile, the distance design and the arrangement of the number of the top bailey pieces are designed according to the self weight of the mounting beam body and the construction load of the bridge girder erection machine.

Further, the step S2 further includes the following steps:

b1, designing six phi 20 deformed steel bar embedded bars in the capping beam vertically in each temporary buttress, wherein the embedded length is 100 cm;

b2: and the height of the vertical mold of the temporary buttress is based on the high side stop block, so that the top elevation of the temporary buttress is kept horizontal.

In actual operation, three temporary buttresses are designed in total, and six phi 20 deformed steel bar embedded reinforcements are vertically designed on each temporary buttress, and the embedded length of each embedded reinforcement in the cover beam is 100 cm. The height of the vertical mold of the temporary buttress takes a high side stop block as a reference to ensure the top elevation level of the three temporary buttresses.

further, the step S3 further includes the following steps:

C1: firstly, arranging connecting flower stands, wherein the distance between the connecting flower stands is 45cm multiplied by 45cm, and then transversely arranging 5 pieces of Bailey on the connecting flower stands;

c2: after the setting in the step C1, the longitudinal connecting flower stand is connected with the Bailey sheet through bolts by using L10 angle steel;

C3: bamboo plywood with the thickness of 1.8cm is placed on the contact surface of the Bailey beam and the temporary buttress, so that the foundation is stressed more uniformly.

In actual operation, three rows of common 321-type Bailey pieces are adopted in the design, the flower shelf interval is 45cm multiplied by 45cm, and 5 Bailey pieces are transversely arranged. The longitudinal connecting flower frame is connected with the Bailey sheet through L10 angle steel and bolts. Bamboo plywood with the thickness of 1.8cm is placed on the contact surface of the Bailey beam and the temporary buttress, so that the foundation is stressed more uniformly.

Further, the step S4 further includes the following steps:

d1: after the Bailey beam is installed, the Bailey beam and the temporary buttress are subjected to temporary welding and anchoring through the embedded steel bars;

d2: and D1, fixedly mounting the support leg rail in the bridge girder erection machine at the upper end of the Bailey beam by welding and anchoring.

in actual operation, after the Bailey beams are installed, the Bailey beams and the temporary buttresses are temporarily welded and anchored through the embedded steel bars, so that the stability of the Bailey beams is improved, and the Bailey bracket system is prevented from side turning when the bridge girder erection machine moves transversely and longitudinally.

further, the step S5 further includes the following steps:

E1: firstly, closing a left main bridge hanging basket, and then, carrying out hole passing by a bridge girder erection machine;

E2: the left and right center leg rails are then installed to be connected as a unit while ensuring the horizontal placement of the rails, via step E1.

In actual operation, after the hanging basket of the left main bridge is closed, the bridge girder erection machine firstly conducts hole passing, then the left middle support leg rail and the right middle support leg rail are installed to be connected into a whole, and meanwhile the horizontal placement of the rails is guaranteed. When the beam slab is installed, the accuracy of beam slab installation and the width of the reserved expansion joint are ensured.

Further, the step S6 further includes the following steps:

f1: after the beam plate is installed, the bridge girder erection machine moves forwards to pass through the hole;

f2: after step F1, the temporary beret beam is removed and the temporary pier is broken.

in actual operation, after the beam plate is installed, the bridge erecting machine moves forwards to pass through the hole. And then the temporary bailey beam is dismantled and the temporary buttress is broken. The Bailey beam is integrally hoisted to the bridge floor by a truck crane and then manually disassembled, and the temporary buttress is chiseled by manually using an electric pick.

It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.