CN-121993548-A - Counterweight device and system for large-scale storage tank vault air jacking

CN121993548ACN 121993548 ACN121993548 ACN 121993548ACN-121993548-A

Abstract

The invention discloses a counterweight device and a counterweight system for jacking vault gas of a large-scale storage tank, which relate to the technical field of LNG low-temperature storage tank construction, and can realize a reliable central stress starting point from the highest point of a first section steel beam in the vault gas jacking process by arranging a central anchoring mechanism, a plurality of connecting mechanisms and a plurality of counterweight mechanisms, so that the problems of slipping of an anchoring point or local stress concentration caused by a single girder with a small space are avoided; the plurality of connecting mechanisms are radially arranged, central anchoring force is uniformly transmitted to all areas around the vault, distribution of the counterweight force in the circumferential direction tends to be balanced, the phenomenon of insufficient counterweight or overload caused by uneven airflow or local rigidity difference is remarkably reduced, each counterweight mechanism is directly clamped between adjacent second steel beams, the existing steel beams are used as stable supporting references, the counterweight body is effectively prevented from sliding, shifting or impacting the steel structure under airflow disturbance or vibration, and local stress concentration and steel structure damage are avoided.

Inventors

ZHANG YINQIANG
HUANG YONGQING
ZENG WENQI
HUANG FUSHENG
DU XUEZHI
ZHOU ZHUMING
LIU JIGONG
PAN YONG

Assignees

中国建筑第二工程局有限公司
中建电力工程(深圳)有限公司

Dates

Publication Date: 20260508
Application Date: 20260318

Claims (10)

1. A counterweight device for large tank vault air jacking, said tank vault including a first shaped steel beam located at the highest position of the inner wall of said vault and a plurality of second shaped steel beams circumferentially spaced apart from said vault inner wall, all of said second shaped steel beams having an arc consistent with the arc of said vault, and all of said second shaped steel beams having a high end connected to said first shaped steel beam, said counterweight device comprising: The central anchoring mechanism is detachably clamped on the first section steel beam, is positioned below the vault and is provided with a plurality of connecting positions distributed at intervals along the circumferential direction; The connecting mechanisms are connected with the connecting positions in a one-to-one correspondence mode, and all the connecting mechanisms radiate outwards along the radial direction of the vault; the weight mechanisms are connected with the connecting mechanisms in a consistent and one-to-one correspondence mode, each weight mechanism is clamped between any two adjacent second-type steel beams, and all weight mechanisms are hung in the vault.
2. The counterweight device for large tank vault air jacking of claim 1 wherein said first section steel beam is an H-shaped steel beam; the central anchoring mechanism includes: at least two anchoring parts, all of which can be clamped and anchored on the flange of the first section steel beam, all of which are distributed at intervals on the first section steel beam and are positioned below the vault, and And the connecting parts are arranged at the bottoms of the anchoring parts and are connected with all the anchoring parts, and a plurality of connecting positions which are distributed at intervals along the circumferential direction of the connecting parts are formed on the connecting parts.
3. The counterweight device for large tank vault air jacking of claim 2 wherein said anchor member includes: A first anchoring claw clamped on the flange of the first section steel beam, and The first fastening piece is installed on the first anchoring claw, and the first fastening piece can fasten the first anchoring claw on the first section steel beam.
4. A counterweight device for jacking a dome of a large storage tank as set forth in claim 3, wherein the first fastening means includes two fastening buckles, the two fastening buckles are oppositely disposed and engaged on flanges of the first section steel beam, a plurality of through holes are disposed on each of the two fastening buckles in an array, the first fastening means is fastening bolts, and the fastening bolts are disposed in a one-to-one correspondence with the number of the through holes so as to fasten the two fastening buckles to the first section steel beam.
5. A counterweight device for use in the dome air jacking of a large tank as recited in claim 2, wherein said connecting member includes a land, said land being connected to all of said anchor members, and said land being provided with a plurality of said connection locations circumferentially spaced apart.
6. A counterweight device for large tank vault air jacking as defined in any one of claims 1 to 5, wherein said attachment mechanism includes: A plurality of connecting steel ropes, the connecting steel ropes are arranged in a one-to-one correspondence with the connecting positions, and The dampers are arranged at one ends of the connecting steel ropes, which are far away from the connecting positions, in a one-to-one correspondence manner, and are connected with the corresponding counterweight mechanisms.
7. A counterweight device for large tank vault air jacking as defined in any one of claims 1 to 5, wherein said counterweight mechanism includes: the anchoring component can be connected to any second-type steel beam, one end of the anchoring component is arranged towards the inner wall of the vault, and one side of the anchoring component, which is arranged towards the inner wall of the vault, can be adsorbed to the inner wall of the vault; A load bearing member mounted to the bottom of the anchor member, the load bearing member having a load bearing space formed therein, an The balancing weight is placed in the bearing space.
8. The counterweight device for large tank vault air jacking of claim 7 wherein said anchor member includes: a mounting plate; the absorbing piece is arranged on one side of the mounting plate, which faces the inner wall of the vault, and can absorb the inner wall of the vault; A second anchoring claw which is distributed on one side of the mounting plate facing the vault at intervals with the adsorbing piece and can be clamped on the flange of the second section steel beam, and And the second fastening piece is mounted on the second anchoring claw and can fasten the second anchoring claw to the second section steel beam.
9. The counterweight device for large tank vault air jacking of claim 8 wherein said load bearing member includes: the connecting plate is arranged on the mounting plate; The bearing frame is connected with the connecting plate, the bearing space is formed in the bearing frame, a horizontal hole penetrating through the bearing frame is arranged on the bearing frame, and The locking piece can penetrate through the horizontal hole and lock the balancing weight to the bearing frame.
10. A counterweight system for large tank vault air lift comprising a counterweight device according to any of claims 1 to 9.

Description

Counterweight device and system for large-scale storage tank vault air jacking Technical Field The invention relates to the technical field of LNG low-temperature storage tank construction, in particular to a counterweight device and a counterweight system for jacking vault gas of a large-scale storage tank. Background With the rapid development of the energy industry, particularly the Liquefied Natural Gas (LNG) industry, the construction scale of large cryogenic storage tanks is expanding, and the single tank volume has been developed from tens of thousands of cubic meters to hundreds of thousands of cubic meters or even more in the early days. The outer tank of the large-sized low-temperature storage tank adopts a prestressed reinforced concrete structure, and the vault is usually a steel structure vault. In order to improve the construction efficiency, reduce the risk of overhead operation and shorten the whole construction period, the vault jacking construction process gradually becomes a mainstream construction method. The technology utilizes an air blower to continuously convey micro-pressure air to a sealed space below the assembled vault, and stably lifts the whole ground or the low-level assembled steel vault to a designed elevation by means of air pressure difference, and the whole ground or the low-level assembled steel vault is in butt joint with a bearing ring at the top of the tank wall and fixed. At present, in the jacking construction of a large-scale low-temperature storage tank vault, in order to prevent the vault from tilting, unstability or local buckling caused by factors such as wind load, uneven airflow, self-weight distribution of a structure or local rigidity difference in the jacking process, a certain downward gravity is usually applied to a vault steel structure so as to increase the integral anti-floating stability and deformation control capability of the structure. The existing counterweight mode mainly comprises the steps of directly stacking temporary counterweights such as sand bags, concrete blocks, water bags and the like on the vault, or adopting methods of hanging the weights, arranging temporary guy rope counterweights and the like. These weight measures are typically secured by means of steel beams, nodes or temporary support structures to which the dome has been mounted, and the weight is gradually adjusted or removed during the jacking process according to the monitored data. However, although the counterweight function can be realized by using the method, in the actual operation process, as the central area (highest point) of the vault is usually only provided with a main steel beam, the stress is concentrated, the space is narrow, reliable and stable central anchoring is difficult to realize, more uniform radial loading along the circumferential direction of the vault is difficult to realize, partial area counterweight is insufficient or overloaded, sliding and deflection are easy to occur under airflow disturbance or jacking vibration, and even local stress concentration or damage to a steel structure is caused, so that the overall jacking stability is influenced. Disclosure of Invention The invention mainly aims to provide a counterweight device and a counterweight system for jacking vault air of a large storage tank, and aims to solve the technical problems that in the prior art, in the actual operation process, as a vault central area (highest point) is usually only provided with a main steel beam, stress is concentrated, the space is narrow, reliable and stable central anchoring is difficult to realize, uniform radial loading along the circumference of the vault is difficult to realize, partial area counterweight is insufficient or overloaded, sliding and deflection are easy to occur under airflow disturbance or jacking vibration, and even local stress concentration or steel structure damage is caused, and the overall jacking stability is influenced. In order to achieve the above object, in a first aspect, the present invention provides a counterweight device for air jacking of a large-scale tank dome, where the tank dome includes a first section steel beam located at a highest position of an inner wall of the dome and a plurality of second section steel beams circumferentially spaced apart from the inner wall of the dome, the radian of all the second section steel beams is consistent with that of the dome, and the high ends of all the second section steel beams are connected with the first section steel beams, the counterweight device includes: The central anchoring mechanism is detachably clamped on the first section steel beam, is positioned below the vault and is provided with a plurality of connecting positions distributed at intervals along the circumferential direction; The connecting mechanisms are connected with the connecting positions in a one-to-one correspondence mode, and all the connecting mechanisms radiate outwards along the radial direction