CN-121990110-A - Ship positioning method for square wharf construction in narrow water area

CN121990110ACN 121990110 ACN121990110 ACN 121990110ACN-121990110-A

Abstract

The invention belongs to the technical field of ship positioning, and relates to a ship positioning method used for square wharfs in narrow water areas. The method comprises the steps of prefabricating a bollard, moving a crane ship to a position to be constructed, respectively anchoring two rear anchor cables to the water bottom, judging whether the distance between the crane ship and the shore side exceeds a preset distance, anchoring a front anchor cable close to the shore side to the shore if the distance exceeds the preset distance, inserting a bollard into a hoisting hole of an installed square, sleeving the front anchor cable close to the shore side on the bollard, further judging whether the installed square blocks the front anchor cable far away from the shore side from the water bottom, anchoring the front anchor cable far away from the shore side to the water bottom if the distance exceeds the preset distance, inserting a bollard into the hoisting hole of the installed square, and sleeving the front anchor cable far away from the shore side on the bollard. The movable bollard is matched with the hoisting hole on the square, and the movable bollard is designed and applied, so that the positioning requirement of the crane ship during the square wharf construction in a narrow water area can be met, and the crane ship is prevented from being anchored.

Inventors

YANG HONGJIAN
WANG XIANG
FU DAWEI
Zhai Xunlong
GUAN YANAN
Ren Xingchen
ZHANG MINGYU
YANG YUXIAO
KUANG LEI
GUO YUNFEI
YANG WEIGUANG
WANG DIANWEN
SUN YANGYANG
WEI HONGBO
LIN SHUDONG
JU PENG

Assignees

中交第一航务工程局有限公司
中交一航局第二工程有限公司

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (9)

1. The ship positioning method for the construction of the square wharf in the narrow water area is characterized by comprising the following steps of: s1, prefabricating a bollard, wherein the appearance and the size of the bollard are matched with a hoisting hole on a square block; S2, positioning a crane ship, wherein two front anchor cables are arranged on the bow of the crane ship, two rear anchor cables are arranged on the stern of the crane ship, and the step S2 comprises the following steps: s21, the crane ship moves to a position to be constructed, the length direction of the crane ship is perpendicular to the length direction of a square wharf to be constructed, and the bow of the crane ship is close to the square wharf to be constructed; s22, respectively anchoring the two rear anchor cables to the water bottom; S23, judging whether the distance between the crane ship and the shore exceeds a preset distance, if not, anchoring the front anchor cable close to the shore, if so, inserting a bollard into a hoisting hole on the installed square, sleeving the front anchor cable close to the shore on the bollard, further judging whether the installed square blocks the front anchor cable far from the shore to the water bottom, if not, anchoring the front anchor cable far from the shore to the water bottom, and if so, inserting a bollard into the hoisting hole on the installed square, sleeving the front anchor cable far from the shore on the bollard.
2. The ship positioning method for construction of a small water area square wharf according to claim 1, wherein the crane ship further comprises a subsidiary anchor cable positioned between the two front anchor cables, wherein step S23 further comprises determining whether the mounted square blocks the subsidiary anchor cable from being anchored to the water bottom, if not, anchoring the subsidiary anchor cable to the water bottom, and if so, inserting a bollard into a hoist hole in the mounted square block, and sleeving the subsidiary anchor cable on the bollard.
3. The ship positioning method for construction of square wharfs in narrow water areas according to claim 1 or 2, wherein the bollard comprises a pile shell and a lower baffle plate, the pile shell is a hollow shell with an upper opening, the external dimension of the pile shell is matched with a lifting hole in a square, concrete is poured inside the pile shell, the lower baffle plate is sleeved on the outer wall of the pile shell and connected to the middle upper portion of the pile shell, the external dimension of the lower baffle plate is larger than the dimension of a taper hole in the square, and in step S23, the lower baffle plate is in pressure connection with the top surface of the square when the bollard is inserted into the lifting hole in the installed square.
4. A method of positioning a vessel in a small water area square dock construction according to claim 3, wherein the bollard further comprises an upper baffle plate which is fitted over the outer wall of the bollard housing and connected to the top of the bollard housing.
5. A method of positioning a vessel for use in the construction of a small water square pier according to claim 3, wherein the bollard further comprises a suspension point, the lower part of which is embedded in the concrete at the top of the bollard.
6. A method of positioning a vessel in a small water area block terminal according to claim 3, wherein the height of the lower baffle to the bottom surface of the bollard is between 0.5 and 1 times the height of the block.
7. The ship positioning method for construction of square wharfs in narrow water area according to claim 3, wherein the bollard further comprises a plurality of annular rib plates arranged inside the bollard shell, the plurality of annular rib plates are arranged at intervals along the axial direction of the bollard shell, and the outer ring of each annular rib plate is connected with the inner wall of the bollard shell.
8. The method for positioning a vessel in construction of a square dock in a small water area according to claim 7, wherein the bollard further comprises a plurality of vertical ribs arranged inside the bollard shell, the plurality of vertical ribs being arranged at intervals around the circumference of the bollard shell, each of the vertical ribs extending in the axial direction of the bollard shell and being connected with a plurality of annular ribs.
9. The ship positioning method for construction of square wharfs in narrow water areas according to claim 1 or 2, wherein the outer wall of the bollard is in a tapered state from the top surface to the bottom surface, and the inclination angle of the outer wall of the bollard is between 0 degrees and 5 degrees.

Description

Ship positioning method for square wharf construction in narrow water area Technical Field The invention belongs to the technical field of ship positioning, and particularly relates to a ship positioning method used for construction of square wharfs in narrow water areas. Background The gravity type square wharf is a common port structure, is formed by assembling and stacking a plurality of precast concrete squares, has the advantages of firm and durable structure, capability of bearing heavy load and the like, and is commonly used as a wharf for cargo loading and unloading or ship berthing. The square block is generally shown in fig. 1, a plurality of lifting holes 11 are formed in the square block 10 in a penetrating manner, an externally-expanded taper hole 111 is formed in the upper portion of the lifting hole 11, a counter bore 112 is formed in the middle portion or the lower portion of the lifting hole 11, the counter bore 112 is larger than the lifting hole 11 in size, and the lifting hole 11 and the counter bore 112 can be round holes or square holes. When the square wharf is constructed, a crane ship is used for connecting a lifting device to lift, position, install and adjust the square 10 in place, the lifting device comprises an openable lifting hook, and the lifting hook enters a counter bore 112 through a taper hole 111 and a lifting hole 11 and then is spread so as to lift the square 10. At present, the positioning mode of the crane ship is mainly anchor-lowering, namely two anchor cables are usually arranged at the bow and stern of the crane ship respectively, the water anchoring positioning of the crane ship is realized through four anchor cables, and if the crane ship is close to the shore, the crane ship can also carry out cable-carrying through a land-buried anchor-on-shore mode. However, the above positioning method is not fully applicable to the construction of square wharfs in narrow and small water areas, because the crane ship and the square wharfs are in a vertical standing position during the construction, the length direction from the bow to the stern of the crane ship is vertical to the length direction of the square wharfs, the bow of the crane ship is close to one side of the square wharfs, the front anchor cable at the bow side cannot be outwards thrown out of the anchor below the ship due to the blocking of the receiving block, and when the land on the shore is far away from the ship, the cable can not be realized through the mode of the anchor below the ground. In order to solve the problems, a block is temporarily placed on the top of the block to serve as a bollard and a cable, the block is usually made of concrete, and the ship is stabilized through friction between the block and the block of the installed wharf. However, the method is not suitable for a crane ship with larger tonnage, the anchor machine of the large crane ship is about 50t, the friction coefficient between a block body made of concrete and a wharf block is about 0.5-0.8, so that the minimum dead weight of the block body is more than 100t, under the condition of bad sea conditions, the instantaneous pulling force of the crane ship is far more than 50t, the dead weight of the block body is increased, the block body is heavy and inconvenient to hoist, the block body is temporarily placed on the top of the installed block, and the possibility of sliding displacement exists in the block body, so that the crane ship is in risk of anchor walking. Disclosure of Invention Aiming at the defects existing in the related art, the invention provides a ship positioning method used for the construction of square wharfs in narrow water areas, which aims to solve the technical problems in the background art. The invention provides a ship positioning method used for construction of square wharfs in narrow water areas, which comprises the following steps: S1, prefabricating a bollard, wherein the appearance and the size of the bollard are matched with a hoisting hole on a square block; S2, positioning a crane ship, wherein a bow of the crane ship is provided with two front anchor cables, a stern of the crane ship is provided with two rear anchor cables, and the step S2 comprises the following steps: s21, moving the crane ship to a position to be constructed, enabling the length direction of the crane ship to be perpendicular to the length direction of the square wharf to be constructed, and enabling the bow of the crane ship to be close to the square wharf to be constructed; s22, respectively anchoring the two rear anchor cables to the water bottom; S23, judging whether the distance between the crane ship and the shore exceeds a preset distance, if not, anchoring the front anchor cable close to the shore, if so, inserting a bollard into a hoisting hole on the installed square, sleeving the front anchor cable close to the shore on the bollard, further judging whether the installed square blocks the front anchor cable far aw