CN112412054A

CN112412054A - Construction method for cumulating and synchronously lifting different structural systems

Info

Publication number: CN112412054A
Application number: CN202011189587.7A
Authority: CN
Inventors: 何成元; 刘宇欣; 张福川; 蒋国明; 年全军; 黄文华
Original assignee: MCC Shanghai Steel Structure Technology Co Ltd
Current assignee: MCC Shanghai Steel Structure Technology Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-02-26

Abstract

The invention relates to a construction method for cumulating and synchronously lifting different structural systems, which comprises the following steps of 1: construction of a lifting structure; step 2: the ground of the lifted structure is preassembled; and step 3: installing lifting equipment; and 4, step 4: fixing the first lifted structure and the lifting structure; and 5: the rest lifter lifts the second lifted structure by a preset height; step 6: installing a supplement rod piece between the lifted structures; and 7: removing the lifting equipment on the first lifted structure; and 8: dismantling the section steel between the first lifted structure and the lifting structure; and step 9: the lifter lifts the lifted structure to a design elevation; step 10: installing and welding rear-mounted rod pieces between the lifted structure and the pre-mounting structure and between the lifted structure and the lifting structure; step 11: and (5) dismantling the lifting equipment. The invention reduces the high-altitude operation amount to the maximum extent, and is beneficial to the control of construction safety, quality and progress.

Description

Construction method for cumulating and synchronously lifting different structural systems

Technical Field

The invention relates to the field of building construction, in particular to a construction method for cumulating and synchronously lifting different structural systems.

Background

The hydraulic lifting technology of the single-form structural system is mature, for example, the grid structure lifting and the truss structure lifting are performed, when one structure is composed of two different structural systems, if the two structural systems are integrally lifted, the high-altitude operation amount can be reduced, the quality control and the safety management are facilitated, the construction period is shortened, but the different structural systems are different in section height and cannot be lifted in place at one time, and the accumulative lifting is required.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a construction method for cumulatively and synchronously lifting different structural systems, and solves the problem of lifting construction of two structural systems with different section heights.

In order to solve the technical problem, the invention is realized as follows:

a construction method for cumulating and synchronously lifting different structural systems is characterized by comprising the following steps:

step 1: constructing all lifting structures;

step 2: assembling and welding the ground of the first and second lifted structures, and installing a pre-assembly structure, wherein the pre-assembly structure comprises an air pipe, a fire-fighting water pipe, a roof purline and a truss auxiliary structure;

and step 3: all lifting supports and lifters are installed: a lifting bracket, a lifter and a steel strand are arranged on the lifting structure and the lifted structure;

and 4, step 4: after a preset force value is applied to part of the lifters, fixing the first lifted structure and the lifting structures on two sides of the first lifted structure, and preventing the first lifted structure from displacing when the

steps

5, 6 and 7 are carried out;

and 5: the rest part lifter lifts the second lifted structure by a preset height;

step 6: mounting and welding a supplementary rod piece between the first and second lifted structures;

and 7: unloading and dismantling the lifting support and the lifter on the first lifted structure after the flaw detection of the additional rod piece is qualified;

and 8: removing the section steel temporarily connected between the first lifted structure and the lifting structures on the two sides of the first lifted structure;

and step 9: lifting the first and second lifted structures to a designed elevation by using a lifter;

step 10: mounting and welding rear-mounted rod pieces between the first and second lifted structures and the pre-mounting structure and between the first and second lifted structures and the lifting structures on the two sides of the first and second lifted structures;

step 11: and unloading and dismantling the lifting support and the lifter after the flaw detection of the rear loading rod piece is qualified.

The invention has the beneficial effects that: the high-altitude operation amount is reduced to the maximum extent, the safety control of projects is facilitated, the construction operation efficiency is improved, the construction cost is reduced, and the construction quality is ensured.

Drawings

The invention is described in further detail below with reference to the following figures and embodiments:

FIG. 1 steel structure lifting axonometric drawing

FIG. 2 is a schematic view of a lifting structure;

FIG. 3 is a schematic view of the assembly and welding of the ground of the structure to be lifted, the installation of the auxiliary structures such as air pipes, roof purlins, fire hoses and the like, and the installation of the preassembly structure;

FIG. 4 is a schematic illustration of a lifting installation;

FIG. 5 is a plan view of the first lifting points of the net rack

FIG. 6 is a schematic view showing the first lifted structure and the fixed structure of the lifting structure before the net rack is lifted for the first time

FIG. 7 is a schematic view of the first lifting of the rack;

FIG. 8 is a schematic view of the installation of the supplemental rods between the net rack and the truss;

FIG. 9 is a schematic view of the truss and the net rack being lifted to a designed elevation as a whole;

FIG. 10 is a plan view of the truss and net rack integral lifting points;

FIG. 11 is a schematic view of the remaining rear loading bar installation welding;

fig. 12 is a schematic view of the lifting installation being unloaded and dismantled.

Detailed Description

A construction method for cumulating and synchronously lifting different structural systems comprises the following steps:

as shown in fig. 2: step 1: constructing all the lifting structures 1, 4 and 5;

as shown in fig. 3: step 2: the first and second lifted structures 3 and 6 are assembled and welded on the ground, and the pre-assembly structure 2 is installed and comprises an air pipe, a fire hose 21 and a roof purline 22;

as shown in fig. 4: and step 3: installation of all

lifting devices

7, 8, 9, 10, 11, 12, which are installed including lifting brackets 31 and lifters 32: a lifting bracket, a lifter and a steel strand 33 are arranged on the lifting structure and the lifted structure;

as shown in fig. 6: and 4, step 4: after a preset force value is applied to the partial lifting devices 9 and 11, the first lifted structure 6 and the lifting structures 4 and 5 on the two sides of the first lifted structure are fixed by using H-shaped steel 13, so that the first lifted structure 6 is prevented from being displaced when the

steps

5, 6 and 7 are carried out;

as shown in fig. 7: and 5: the remaining part of the

lifting devices

7, 8, 10, 12 lifts the second structure to be lifted 3 by a predetermined height;

as shown in fig. 8: step 6: mounting and welding a supplement rod 41 between the first and second lifted structures 3 and 6;

and 7: unloading and dismantling the lifting equipment 10 on the first lifted structure 6 after the flaw detection of the supplementing rod piece is qualified;

and 8: removing the section steel temporarily connected between the first lifted structure 6 and the lifting structures 4 and 5 on the two sides of the first lifted structure;

as shown in fig. 9: and step 9: lifting the first and second structures to be lifted 3 and 6 to a design elevation by using

lifting devices

7, 8, 9, 11 and 12;

as shown in fig. 11: step 10: installing and welding rear loading rod pieces 42 between the first and second lifted structures 3 and 6 and the preassembly structure 2 and between the first and second lifted structures 3 and 6 and the lifting structures 4 and 5 on the two sides of the first and second lifted structures;

as shown in fig. 12: step 11: and unloading and dismantling the

lifting devices

7, 8, 9, 11 and 12 after the flaw detection of the rear loading rod piece is qualified.

Claims

1. A construction method for cumulating and synchronously lifting different structural systems is characterized by comprising the following steps:

step 1: constructing all lifting structures;

and 4, step 4: after a preset force value is applied to part of the lifters, fixing the first lifted structure and the lifting structures on two sides of the first lifted structure, and preventing the first lifted structure from displacing when the steps 5, 6 and 7 are carried out;