CN-115872273-B - Method for installing underwater prefabricated part

CN115872273BCN 115872273 BCN115872273 BCN 115872273BCN-115872273-B

Abstract

The invention discloses an underwater prefabricated part installation method, which comprises the steps of arranging a pull ring on an underwater substrate surface in a pre-buried mode, arranging hanging rings on the front and rear parts of the top surface of a prefabricated part in a pre-buried mode, connecting one end of a traction rope on the front hanging ring of a first prefabricated part, enabling the other end of the traction rope to penetrate through the pull ring, hanging the first prefabricated part above the vicinity of a target position, pulling the traction rope to drive the first prefabricated part to approach the target position, enabling the first prefabricated part to descend to the underwater substrate surface, enabling the traction rope to pull the first prefabricated part in place, connecting one end of the traction rope on the front hanging ring of a current prefabricated part, enabling the other end of the traction rope to penetrate through the rear hanging ring of the previous prefabricated part, hanging the current prefabricated part above the vicinity of the previous prefabricated part, pulling the traction rope to drive the current prefabricated part to approach the previous prefabricated part, enabling the current prefabricated part to descend to the underwater substrate surface, and enabling the traction rope to pull the current prefabricated part to be aligned in place. The invention can realize the one-time accurate positioning and installation of the prefabricated part.

Inventors

LI TAO
HUANG ZHIMENG
LIAO HONGYU

Assignees

武汉一冶建筑安装工程有限责任公司
中国一冶集团有限公司

Dates

Publication Date: 20260505
Application Date: 20221118

Claims (4)

1. A method for installing an underwater prefabricated part is characterized in that a pull ring is arranged near the target position of a first prefabricated part on the underwater basal surface in a pre-buried mode, and hanging rings are arranged at the front part and the rear part of the top surface of the prefabricated part in a pre-buried mode; when the first prefabricated part is installed, one end of a traction rope is connected to the front hanging ring of the first prefabricated part, the other end of the traction rope penetrates through the pull ring and then stretches out of the water surface, lifting equipment is respectively hung on the front hanging ring and the rear hanging ring of the first prefabricated part through two groups of lifting hooks and lifts the first prefabricated part to the position above the vicinity of the target position, then the traction rope is pulled to drive the first prefabricated part to approach the target position, the first prefabricated part is lowered to the underwater basal surface, when the traction rope can not be pulled any more, the first prefabricated part moves in place; The automatic unhooking mechanism comprises a baffle plate, a spring, a pair of side plates, a hanging hook, a hanging rope, a hanging hook and a spring reset, wherein the baffle plate is arranged nearby the hanging ring in a pre-buried mode, the spring and the pair of side plates are fixed on the baffle plate, the spring is positioned between the pair of side plates, the hanging hook is hung on the hanging ring and is tensioned together with the hanging rope when the hanging hook is lifted, the hanging hook is positioned between the pair of side plates, the spring is compressed on the baffle plate by the tensioned hanging hook, and after the prefabricated part is lowered to the underwater basal surface, the hanging rope and the hanging hook are loosened, and the hanging hook is ejected out of the hanging ring by the spring reset, so that automatic unhooking is realized.
2. The method of installing an underwater prefabricated part according to claim 1, wherein the hanging ring is formed by bending a whole round steel, two ends of the round steel are positioned in the prefabricated part, and the middle of the round steel protrudes upwards to form a ring shape.
3. The method for installing the underwater prefabricated part according to claim 1, wherein the hanging ring is welded and fixed with the prefabricated part steel bars before the prefabricated part is poured, the pull ring is welded and fixed with the underwater basal surface steel bars before the underwater basal surface is poured, the hanging ring is protected when the prefabricated part is poured, and the pull ring is protected when the underwater basal surface is poured.
4. The method for installing an underwater prefabricated member according to claim 1, wherein after all the prefabricated members are installed, the butt joint of the prefabricated members is inspected, and if a gap is found, grouting treatment is performed.

Description

Method for installing underwater prefabricated part Technical Field The invention belongs to the field of hydraulic engineering, and particularly relates to an underwater prefabricated part installation method. Background In engineering construction such as airport, wharf, river management, etc., there is installation of underwater prefabricated components, and due to the influence of buoyancy of water, sea wave and tide, etc., the accuracy of underwater installation is difficult to control, so that the engineering construction progress and quality are influenced. Disclosure of Invention The invention aims to provide an underwater prefabricated part installation method which can realize one-time accurate positioning installation of prefabricated parts, does not need repeated underwater fine adjustment, has controllable construction period and low construction cost, and enhances the construction precision and safety. The technical scheme adopted by the invention is as follows: A method for installing an underwater prefabricated part includes such steps as installing a first prefabricated part, installing pull ring near the target position of the first prefabricated part, installing pull ring on the front and back of the top of the prefabricated part, connecting one end of pull rope to the front of the prefabricated part, passing the other end of pull rope through pull ring, hanging the first prefabricated part to the position near the target position by two hooks, pulling pull rope to drive the first prefabricated part to be close to the target position, lowering the first prefabricated part to the underwater bottom, moving the first prefabricated part to the position when pull rope can not be pulled, installing other prefabricated parts, connecting one end of pull rope to the front of the current prefabricated part, extending the other end of pull rope to the back of the previous prefabricated part, hanging the current prefabricated part to the position near the previous prefabricated part by two groups of hooks, and pulling the pull rope to the position near the current prefabricated part. The automatic unhooking mechanism comprises a baffle plate, a spring and a pair of side plates, wherein the baffle plate is pre-buried near the hanging ring, the spring and the pair of side plates are fixed on the baffle plate, the hanging ring is hung on the hanging ring and is tensioned together with the hanging rope during lifting, the hanging hook is positioned between the pair of side plates, the tensioned hanging hook compresses the spring on the baffle plate, and after the prefabricated part is lowered to the underwater basal surface, the hanging rope and the hanging hook are loosened, and the spring returns to eject the hanging hook out of the hanging ring, so that automatic unhooking is realized. Further, the hanging ring is formed by bending whole round steel, two ends of the round steel are positioned in the prefabricated part, the round steel is tilted upwards, and the middle of the round steel protrudes upwards to form a ring shape. The method comprises the steps of connecting a lifting ring with a prefabricated part steel bar in a welded mode before pouring the prefabricated part, connecting a pull ring with an underwater basal surface steel bar in a welded mode before pouring the underwater basal surface, protecting the lifting ring when pouring the prefabricated part, and protecting the pull ring when pouring the underwater basal surface. Further, after all the prefabricated parts are installed, the butt joint positions of the prefabricated parts are detected, and grouting treatment is carried out if gaps are found. The beneficial effects of the invention are as follows: The invention can realize the one-time accurate positioning and installation of the prefabricated part, does not need multiple times of underwater fine adjustment, has controllable construction period and low construction cost, can prevent the prefabricated part from swinging too much under the stormy waves besides pulling the prefabricated part to a preset position, and enhances the construction precision and safety. Drawings Fig. 1 is a schematic view of a first prefabricated element in an embodiment of the invention. Fig. 2 is a schematic view of the present invention when the remaining prefabricated elements are installed. Fig. 3 is a schematic view illustrating the installation of the automatic unhooking mechanism and the hook according to the embodiment of the present invention. Fig. 4 is a schematic diagram of an embodiment of the present invention before embedding a suspension ring. In the figure, the lifting rope is 1-, the lifting hook is 2-, the lifting ring is 3-, the prefabricated part is 4-, the underwater substrate surface is 5-, the pull ring is 6-, the traction rope is 7-, the baffle is 8-, the spring is 9-and the side plate is 10-. Detailed Description The invention is further described below with reference to the drawin