阅读说明：本技术 水下拉绳定位方法及用于沉管水下安装的测量定位方法 (Underwater stay cord positioning method and measuring and positioning method for underwater installation of immersed tube ) 是由 蔡应广 张涛 朱成 欧伟山 刘轩源 陈伟彬 董勇 曾可欣 史朝杰 尹春辉 项家窍 于 2021-08-31 设计创作，主要内容包括：本发明涉及沉管安装技术领域,特别是一种水下拉绳定位方法及用于沉管水下安装的测量定位方法,水下拉绳定位方法包含以下步骤：S1.在已安装沉管上设置第一连接点、第二连接点和第三连接点,在所述待安装沉管上设置汇集点；S2.将测量绳与连接点相连接；S3.将所述第一测量绳、第二测量绳和第三测量绳汇集于所述汇集点；S4.张紧所述第一测量绳、第二测量绳和第三测量绳；S5.测量出第一距离、第二距离和第三距离；S6.计算出所述汇集点相对于所述已安装沉管的相对位置。本申请的水下拉绳定位方法,与传统的测量计算方法相比,无需安装测量塔,无需配套很多相关测量仪器,提高了施工效率,降低了施工成本,整个测量定位过程简单,方便。(The invention relates to the technical field of immersed tube installation, in particular to an underwater stay cord positioning method and a measuring and positioning method for underwater immersed tube installation, wherein the underwater stay cord positioning method comprises the following steps: s1, arranging a first connection point, a second connection point and a third connection point on an installed immersed tube, and arranging a collection point on the immersed tube to be installed; s2, connecting the measuring rope with the connecting point; s3, collecting the first measuring rope, the second measuring rope and the third measuring rope at a collecting point; s4, tensioning the first measuring rope, the second measuring rope and the third measuring rope; s5, measuring a first distance, a second distance and a third distance; and S6, calculating the relative position of the collection point relative to the installed immersed tube. Compared with the traditional measuring and calculating method, the underwater stay rope positioning method does not need to install a measuring tower, does not need to be matched with a plurality of related measuring instruments, improves the construction efficiency, reduces the construction cost, and is simple and convenient in the whole measuring and positioning process.)

1. An underwater stay rope positioning method is based on an installed immersed tube (1) and an immersed tube (2) to be installed, and is characterized in that based on at least three measuring ropes, the three measuring ropes are defined as a first measuring rope (3), a second measuring rope (4) and a third measuring rope (5), and the method comprises the following steps:

s1, arranging a first connecting point (7), a second connecting point (8) and a third connecting point (9) on an installed immersed tube (1), enabling the first connecting point (7), the second connecting point (8) and the third connecting point (9) to be arranged in a triangular mode, and arranging a gathering point (13) on the immersed tube (2) to be installed;

s2, connecting the first measuring rope (3) with the first connecting point (7);

-connecting the second measuring line (4) to the second connection point (8);

-connecting the third measuring line (5) to the third connection point (9);

s3, collecting the same side ends, close to the immersed tube (2) to be installed, of the first measuring rope (3), the second measuring rope (4) and the third measuring rope (5) at a collecting point (13);

s4, tensioning the first measuring rope (3), the second measuring rope (4) and the third measuring rope (5);

s5, measuring a first distance based on a first measuring rope (3), wherein the first distance is the distance between the collecting point (13) and the first connecting point (7);

measuring a second distance based on a second measuring line (4), wherein the second distance is the distance between the collecting point (13) and the second connecting point (8);

-the distance between the collection point (13) and the third connection point (9) based on the measured third distance of the third measuring line (5);

s6, calculating the relative position of the collection point (13) relative to the installed immersed tube (1) based on the first distance, the second distance and the third distance.

2. The underwater pull rope positioning method according to claim 1, wherein the step S6 is specifically: establishing a measurement model based on the positions of the first connection point (7), the second connection point (8) and the third connection point (9), and enabling the measurement model to satisfy the following conditions: when the first distance, the second distance and the third distance are input, the relative position of the collection point (13) relative to the installed immersed tube (1) is obtained.

3. The underwater pull rope positioning method according to claim 2, wherein the establishing of the measurement model in the step S6 specifically includes the following steps:

s61, establishing a coordinate system, placing the first connecting point (7), the second connecting point (8) and the third connecting point (9) in the coordinate system, and calibrating coordinates of the first connecting point (7), the second connecting point (8) and the third connecting point (9);

s62, establishing a position relation model based on the coordinates of the first connecting point (7), the second connecting point (8) and the third connecting point (9), so that the position relation model satisfies the following conditions: when the first distance, the second distance and the third distance are input, the coordinates of the collection point (13) can be obtained, and then the position of the immersed tube (2) to be installed relative to the installed immersed tube (1) is obtained.

4. The underwater pull rope positioning method according to claim 3, wherein the position relationship model is specifically:

BC₁ ²＝(X-X₁)²+(Y-Y₁)²+(Z-Z₁)²

BC₂ ²＝(X-X₂)²+(Y-Y₂)²+(Z-Z₂)²

BC₃ ²＝(X-X₃)²+(Y-Y₃)²+(Z-Z₃)²

wherein the coordinate of the first connecting point (7) is marked C₁(X₁，Y₁，Z₁) (ii) a The coordinate of the second connection point (8) is marked C₂(X₂，Y₂，Z₂) (ii) a The coordinate of the third connection point (9) is marked C₃(X₃，Y₃，Z₃) (ii) a The position of the collection point (13) is marked as (X, Y, Z); BC₁Is a first distance; BC₂Is a second distance; BC₃Is the third distance.

5. The method as claimed in any one of claims 1 to 4, wherein in step S4, the first measuring line (3), the second measuring line (4) and the third measuring line (5) are tensioned by a winch (12).

6. The underwater pull rope positioning method according to any one of claims 1 to 4,

in the step S5, in step S5,

the first measuring rope (3) is provided with a first sensor, and the first sensor is used for measuring the first distance;

and/or

The second measuring rope (4) is provided with a second sensor, and the second sensor is used for measuring the second distance;

and/or

And a third sensor is arranged on the third measuring rope (5), and the third distance is measured by the third sensor.

7. The method of claim 6, wherein the first sensor is a length measuring sensor or a distance measuring sensor;

and/or

The second sensor is a length measuring sensor or a distance measuring sensor;

and/or

The third sensor is a length measuring sensor or a distance measuring sensor.

8. An underwater drawstring positioning method according to any one of claims 1 to 4, characterised in that the collection point (13) is provided at the end of the immersed tube (2) to be installed near the installed immersed tube (1).

9. The underwater stay rope positioning method according to any one of claims 1 to 4, wherein a connecting sleeve (10) is connected to the immersed tube (2) to be installed, the collection point (13) is arranged at a tube head (14) of the connecting sleeve (10), and the same side ends of the first measuring rope (3), the second measuring rope (4) and the third measuring rope (5) penetrate through the connecting sleeve (10) and then are tensioned by a winch (12).

10. A measuring and positioning method for underwater installation of a immersed tube is characterized by comprising the following steps:

A1. -deriving the relative position of at least two collection points (13) with respect to the installed immersed tube (1) using an underwater pull string positioning method according to any one of claims 1 to 9, and installing a tilt instrument for measuring the inclination of the immersed tube (2) to be installed on the immersed tube (2) to be installed;

A2. and calculating the position of the immersed tube (2) to be installed relative to the installed immersed tube (1) according to the relative positions of the at least two collecting points (13) relative to the installed immersed tube (1) and the inclination of the immersed tube (2) to be installed.

Technical Field

The invention relates to the technical field of immersed tube installation, in particular to an underwater stay rope positioning method and a measuring and positioning method for underwater immersed tube installation.

Background

The underwater installation and butt joint of the tunnel immersed tube (the butt joint of the installed immersed tube and the immersed tube to be installed) has high precision requirement, the conventional method is that a measuring tower is respectively installed on the upper surfaces of the front end and the rear end of the immersed tube, and the characteristic control points of the underwater tube joint are led out for water surface measurement.

Disclosure of Invention

The invention aims to: aiming at the problems of low construction efficiency and high construction cost caused by complicated installation and low construction efficiency of measuring the underwater installation butt joint precision of a tunnel immersed tube by using a measuring tower in the prior art, an underwater stay rope positioning method and a measuring and positioning method for underwater installation of the immersed tube are provided.

In order to achieve the purpose, the invention adopts the technical scheme that:

an underwater stay rope positioning method is based on an installed immersed tube, an immersed tube to be installed and at least three measuring ropes, wherein the three measuring ropes are defined as a first measuring rope, a second measuring rope and a third measuring rope, and the method comprises the following steps:

s1, arranging a first connecting point, a second connecting point and a third connecting point on an installed immersed tube, wherein the first connecting point, the second connecting point and the third connecting point are arranged in a triangular shape, and a gathering point is arranged on the immersed tube to be installed;

s2, connecting the first measuring rope with the first connecting point;

connecting the second measuring line to the second connection point;

connecting the third measuring line to the third connection point;

s3, collecting the same side ends, close to the immersed tube to be installed, of the first measuring rope, the second measuring rope and the third measuring rope at a collecting point;

s4, tensioning the first measuring rope, the second measuring rope and the third measuring rope;

s5, measuring a first distance based on a first measuring rope, wherein the first distance is the distance between the collecting point and the first connecting point;

measuring a second distance based on a second measuring rope, wherein the second distance is the distance between the collection point and the second connection point;

measuring a third distance based on a third measuring rope, wherein the distance between the collecting point and the third connecting point is the distance between the collecting point and the third connecting point;

and S6, calculating the relative position of the collection point relative to the installed immersed tube based on the first distance, the second distance and the third distance.

The utility model provides an underwater stay cord positioning method, whole measurement positioning process utilizes first measuring rope, second measuring rope and third measuring rope calculate respectively first distance, second distance and third distance, and then calculate the collection point for the relative position of heavy pipe has been installed, this scheme compares with traditional measurement calculation method, need not to install the measuring tower, need not supporting a lot of relevant measuring instruments, has improved the efficiency of construction, has reduced construction cost, and whole measurement positioning process is simple, and is convenient.

Preferably, a measurement model is established based on the positions of the first connection point, the second connection point and the third connection point, and the measurement model is made to satisfy: and when the first distance, the second distance and the third distance are input, obtaining the relative position of the collection point relative to the installed immersed tube.

Through establishing the measurement model, the relative position of the collection point relative to the installed immersed tube can be obtained by inputting the first distance, the second distance and the third distance, and the whole calculation process is simple, convenient and quick.

Preferably, the step S6 of establishing the measurement model specifically includes the following steps:

s61, establishing a coordinate system, placing the first connecting point, the second connecting point and the third connecting point in the coordinate system, and calibrating coordinates of the first connecting point, the second connecting point and the third connecting point;

s62, establishing a position relation model based on the coordinates of the first connecting point, the second connecting point and the third connecting point, so that the position relation model meets the following requirements: when the first distance, the second distance and the third distance are input, the coordinates of the collection point can be obtained, and then the position of the immersed tube to be installed relative to the installed immersed tube is obtained.

Preferably, the position relationship model is specifically:

BC₁ ²＝(X-X₁)²+(Y-Y₁)²+(Z-Z₁)²

BC₂ ²＝(X-X₂)²+(Y-Y₂)²+(Z-Z₂)²

BC₃ ²＝(X-X₃)²+(Y-Y₃)²+(Z-Z₃)²

wherein the coordinate of the first connecting point is marked as C₁(X₁，Y₁，Z₁) (ii) a The coordinate of the second connection point is marked C₂(X₂，Y₂，Z₂) (ii) a The coordinate of the third connection point is marked C₃(X₃，Y₃，Z₃) (ii) a The position of the collection point is marked as (X, Y, Z); BC₁Is a first distance; BC₂Is a second distance; BC₃Is the third distance.

Preferably, in step S4, the first measuring rope, the second measuring rope and the third measuring rope are tensioned by a winding machine to ensure that the first measuring rope, the second measuring rope and the third measuring rope are in a tensioned state during measurement and positioning, thereby ensuring the measurement accuracy.

Preferably, in step S5,

in the step S5, in step S5,

the first measuring rope is provided with a first sensor, and the first sensor is used for measuring the first distance;

and/or

The second measuring rope is provided with a second sensor, and the second distance is measured by the second sensor;

and/or

And the third distance is measured by using the third sensor.

Preferably, the first sensor is a length measuring sensor or a distance measuring sensor;

and/or

The second sensor is a length measuring sensor or a distance measuring sensor;

and/or

The third sensor is a length measuring sensor or a distance measuring sensor.

The first distance, the second distance or the third distance are calculated through the length measuring sensor or the distance measuring sensor, so that the whole process is simple and convenient. Preferably, the collecting point is arranged at the end part of the immersed tube to be installed, which is close to the immersed tube already installed, so as to prevent the immersed tube to be installed from interfering with the first measuring rope, the second measuring rope or the third measuring rope due to the structure of the immersed tube to be installed.

Preferably, the immersed tube to be installed is connected with a connecting sleeve, the gathering point is arranged at a tube head of the connecting sleeve, and the same side ends of the first measuring rope, the second measuring rope and the third measuring rope penetrate through the connecting sleeve and then are tensioned by a winch.

The application also discloses a measuring and positioning method for underwater installation of the immersed tube, which comprises the following steps:

A1. the underwater stay rope positioning method is utilized to obtain the relative positions of at least two gathering points relative to the installed immersed tube, and an inclined instrument used for measuring the inclination of the immersed tube to be installed is installed on the immersed tube to be installed.

A2. And calculating the position of the immersed tube to be installed relative to the installed immersed tube according to the relative position of the at least two collection points relative to the installed immersed tube and the inclination of the immersed tube to be installed.

According to the measuring and positioning method, in the whole measuring and positioning process, the position of the immersed tube to be installed relative to the installed immersed tube can be calculated by matching the inclination of the immersed tube to be installed with at least two sets of measuring ropes.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the utility model provides an underwater stay cord positioning method, whole measurement positioning process utilizes first measuring rope, second measuring rope and third measuring rope calculate respectively first distance, second distance and third distance, and then calculate the collection point for the relative position of heavy pipe has been installed, this scheme compares with traditional measurement calculation method, need not to install the measuring tower, need not supporting a lot of relevant measuring instruments, has improved the efficiency of construction, has reduced construction cost, and whole measurement positioning process is simple, and is convenient.

2. According to the underwater stay rope positioning method, the measuring model is established, the first distance, the second distance and the third distance are input, and the relative position of a collection point relative to the installed immersed tube can be obtained, so that the whole calculation process is simple, convenient and rapid.

3. According to the measuring and positioning method, in the whole measuring and positioning process, the position of the immersed tube to be installed relative to the installed immersed tube can be calculated by matching the inclination of the immersed tube to be installed with at least two sets of measuring ropes.

Drawings

Fig. 1 is a measurement schematic diagram of an underwater pull rope positioning method of the invention.

FIG. 2 is an enlarged view of the section H in FIG. 1 according to the present invention.

Fig. 3 is a schematic diagram of the structure of the present invention for tensioning a first measuring line using a sling.

Fig. 4 is a schematic view of a calculation model in which a gathering point is placed in a coordinate system in the underwater pull rope positioning method of the present invention.

Fig. 5 is a measurement schematic diagram of a measurement positioning method for underwater installation of a immersed tube.

Icon: 1-an installed immersed tube; 2-a sinking pipe to be installed; 3-a first measuring string; 4-a second measuring string; 5-a third measuring string; 6-a fixed pulley block; 7-a first connection point; 8-a second connection point; 9-a third connection point; 10-connecting a bushing; 11-hoisting weight; 12-a winch; 13-a collection point; 14-a cartridge; 15-ship.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

As shown in fig. 1-2, the method for positioning an underwater pull rope according to this embodiment defines three measuring ropes as a first measuring rope 3, a second measuring rope 4, and a third measuring rope 5 based on an installed immersed tube 1, an immersed tube 2 to be installed, and at least three measuring ropes, and includes the following steps:

s1, arranging a first connecting point 7, a second connecting point 8 and a third connecting point 9 on an installed immersed tube 1, enabling the first connecting point 7, the second connecting point 8 and the third connecting point 9 to be arranged in a triangle, preferably in an equilateral triangle, and arranging a collecting point 13 on the immersed tube 2 to be installed;

s2, connecting the first measuring rope 3 with the first connecting point 7;

connecting the second measuring line 4 to the second connection point 8;

connecting the third measuring line 5 to the third connection point 9;

s3, collecting the same side ends, close to the immersed tube 2 to be installed, of the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5 at the collecting point 13;

s4, tensioning the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5;

s5, measuring a first distance based on the first measuring rope 3, wherein the first distance is the distance between the collecting point 13 and the first connecting point 7;

measuring a second distance based on a second measuring rope 4, wherein the second distance is the distance between the collecting point 13 and the second connecting point 8;

the distance between the collection point 13 and the third connection point 9 based on the measured third distance of the third measuring line 5;

and S6, calculating the relative position of the collection point 13 relative to the installed immersed tube 1 based on the first distance, the second distance and the third distance.

Step S6 specifically includes: establishing a measurement model based on the positions of the first connection point 7, the second connection point 8 and the third connection point 9, and enabling the measurement model to satisfy the following conditions: when the first, second and third distances are entered, the relative position of the collection point 13 with respect to the installed sinking pipe 1 is obtained. And a measurement model is established, and the relative position of the collection point 13 relative to the installed immersed tube 1 can be obtained by inputting the first distance, the second distance and the third distance, so that the whole calculation process is simple, convenient and quick.

As shown in fig. 4, more specifically, the establishing of the measurement model in step S6 specifically includes the following steps:

s61, establishing a coordinate system, placing the first connecting point 7, the second connecting point 8 and the third connecting point 9 in the coordinate system, and calibrating coordinates of the first connecting point 7, the second connecting point 8 and the third connecting point 9;

s62, establishing a position relation model based on the coordinates of the first connecting point 7, the second connecting point 8 and the third connecting point 9, so that the position relation model meets the following conditions: when the first distance, the second distance and the third distance are input, the coordinates of the collection point 13 can be obtained, and then the position of the immersed tube 2 to be installed relative to the installed immersed tube 1 is obtained.

The position relation model specifically comprises:

BC₁ ²＝(X-X₁)²+(Y-Y₁)²+(Z-Z₁)²

BC₂ ²＝(X-X₂)²+(Y-Y₂)²+(Z-Z₂)²

BC₃ ²＝(X-X₃)²+(Y-Y₃)²+(Z-Z₃)²

wherein the coordinate of the first connecting point 7 is marked C₁(X₁，Y₁，Z₁) (ii) a The coordinate of the second connection point 8 is marked C₂(X₂，Y₂，Z₂) (ii) a The coordinate of the third connection point 9 is marked C₃(X₃，Y₃，Z₃) (ii) a The location of the collection point 13 is marked as (X, Y, Z); BC₁Is a first distance; BC₂Is a second distance; BC₃Is the third distance.

Specifically, the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5 are all steel wire members.

On the basis, in a further preferable mode, in step S4, the first measuring rope 3, the second measuring rope 4, and the third measuring rope 5 are tensioned by the winding machine 12 to ensure that the first measuring rope 3, the second measuring rope 4, and the third measuring rope 5 are in a tensioned state during measurement positioning, thereby ensuring the measurement accuracy.

In practical use, according to specific situations, the winch 12 can be separately configured for the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5, and the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5 can also be wound on the same winch 12.

The winch 12 is disposed on a ship 15 on the water surface or on the shore.

The winch 12 can be replaced by a constant force spring such as a spiral spring, and the tensioning effect can also be achieved.

Alternatively, the hoisting weight 11 plus the fixed pulley or fixed pulley block 6 can be used to generate a pulling force on the first measuring line 3, the second measuring line 4 and the third measuring line 5, as shown in fig. 3.

The measuring ropes of the embodiment are all provided with measuring structures used for displaying a certain length of the measuring rope.

One specific way is as follows: the first measuring rope 3 is provided with a first sensor, the first sensor is used for measuring the first distance, and the first sensor is a length measuring sensor or a distance measuring sensor;

and/or

The second measuring rope 4 is provided with a second sensor, the second sensor is used for measuring the second distance, and the second sensor is a length measuring sensor or a distance measuring sensor;

and/or

The third measuring rope 5 is provided with a third sensor, the third distance is measured by the third sensor, and the third sensor is a length measuring sensor or a distance measuring sensor.

The length measuring sensor can specifically select a pull rope displacement sensor, and a multi-turn absolute rotary encoder is arranged in the length measuring sensor;

the range sensor is typically a laser range finder.

The first distance, the second distance or the third distance are calculated through the length measuring sensor or the distance measuring sensor, so that the whole process is simple and convenient.

The first distance, the second distance or the third distance are calculated through the stay cord displacement sensor or the length measuring sensor or the distance measuring sensor, so that the whole process is simple and convenient.

In practical application, the lengths of the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5 are dozens of meters, but the measuring range of the stay cord displacement sensor only needs a few meters, the stay cord displacement sensor is connected after the immersed tube 2 to be installed is in place quickly, and the stay cord displacement sensor is generally positioned at an initial position. Such as a dual GPS positioning vessel, with reference to the position of the vessel. The measuring range of the stay cord displacement sensor cannot be too large, the pull-out cord of the stay cord displacement sensor is long, and the precision can be reduced.

During specific measurement, the first distance, the second distance or the third distance is the reading-the distance from the outlet of the stay rope displacement sensor to the A-the AB pipe length, and the reading is read by the stay rope displacement sensor.

A constant can also be added, the reading is the distance between BC, the pipe head A needs to be fixed on a ship, and the outlet pull wire is pulled out in parallel.

The gathering point 13 is arranged at the end part of the immersed tube 2 to be installed, which is close to the immersed tube 1 to be installed, so as to avoid the interference of the structure of the immersed tube 2 to be installed on the first measuring rope 3, the second measuring rope 4 or the third measuring rope 5.

On the basis, in a further preferable mode, the immersed tube 2 to be installed is connected with a connecting sleeve 10, the gathering point 13 is arranged at a tube head 14 of the connecting sleeve 10, and the same-side ends of the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5 penetrate through the connecting sleeve 10 and then are tensioned by a winch 12.

The number of the connection sleeves 10 may be one or plural.

A partial inlet end wall of the tip 14 may require a rounding process to prevent the tip 14 from cutting the rope.

In addition, in a more preferable mode, the first measuring rope 3, the second measuring rope 4, and the third measuring rope 5 are all steel wire members.

The beneficial effects of this embodiment: according to the underwater stay rope positioning method, in the whole measuring and positioning process, the first distance, the second distance and the third distance are calculated by the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5 respectively, and then the relative position of the gathering point 13 relative to the installed immersed tube 1 is calculated.

The calculation method is used for calculating the position of the immersed tube 2 to be installed relative to the immersed tube 1 installed, and in the whole process, compared with the traditional measurement calculation method, the scheme does not need to install a measuring tower and a related measuring instrument, so that the construction efficiency is improved, the construction cost is reduced, and the whole calculation process is simple and convenient.

According to the calculation method, the connecting sleeve 10 is considered as one point during calculation, but in the actual construction process, the influence of the diameter of the measuring rope on the calculation result needs to be considered during calculation due to the fact that the measuring rope has the diameter, certain deviation correction is carried out, and the influence of the error on the whole calculation result is small.

On the basis, in a further preferred mode, the technical principle of the measuring rope adopted by the scheme is space distance rear intersection. Arranging measuring points C on the installed immersed tube₁、C₂、C₃Three measuring ropes which are not on the same plane are pulled out from the measuring points, the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5 can be made of steel wires, and have certain strength, can bear enough tensile force, and elastic deformation can meet the standard requirement of the measuring ropes. On the immersed tube to be installed is arrangedA fixed joint sleeve 10 is arranged at a pipe head 14 position B, the first measuring rope 3, the second measuring rope 4 and the third measuring rope 5 are gathered on the point B, and the measuring ropes are bundled and then extend to a point A, BC at the other end of the sleeve through the joint sleeve 10₁、BC₂、BC₃Is a straight line segment and the AB sheath is of a fixed length. The straight-line distance between the installed immersed tube 1 and the immersed tube 2 to be installed can be back calculated only by reading the respective readings of the three measuring ropes by the stay rope displacement sensor at the point A or the rear end, wherein L is equal to C_iB+BA。

Example 2

As shown in fig. 5, the measuring and positioning method for underwater installation of a immersed tube according to the embodiment includes the following steps:

A1. the underwater pull rope positioning method of the embodiment 1 or 2 is used for obtaining the relative positions of at least two gathering points 13 relative to the installed immersed tube 1, and an inclination instrument for measuring the inclination of the immersed tube 2 to be installed is installed on the immersed tube 2 to be installed.

A2. And calculating the position of the immersed tube 2 to be installed relative to the immersed tube 1 to be installed according to the relative positions of the at least two collecting points 13 relative to the immersed tube 1 to be installed and the inclination of the immersed tube 2 to be installed.

Specifically, take two collection points 13 as an example, and respectively denote B₁And B₂In the underwater pull rope positioning method described in embodiment 1 or 2, B is₁Say B₁C₁Is a first distance; b is₁C₂Is a second distance; b is₁C₃Is a third distance; for B₂Say B₂C₄Is a first distance; b is₂C₅Is a second distance; b is₂C₆Is the third distance.

In the whole process, the light passes through the collection point 13B₁And B₂Can determine the line segment B₁B₂The reference surface of the immersed tube 2 to be installed passes through the line segment B₁B₂Then, based on an inclination instrument, such as an inclinometer, installed on the immersed tube 2 to be installed and used for measuring the inclination of the immersed tube 2 to be installed, the inclination of the reference plane can be obtained, based on the line segment B₁B₂Position ofAnd the inclination of the reference surface, namely obtaining the position of the reference surface, thereby obtaining and calculating the position of the immersed tube 2 to be installed relative to the installed immersed tube 1.

The inclinometer may be mounted inside the immersed tube 2 to be installed.

The measuring and positioning method for underwater installation of the immersed tube is applied to at least measuring two gathering points 13 when the immersed tube 2 to be installed is positioned, and the distance between the two points is larger, the positioning precision of the immersed tube 2 to be installed is higher, so the gathering points 13 are arranged near two corner points of the butt joint end of the immersed tube 2 to be installed and the immersed tube 1 to be installed.

According to the measuring and positioning method, in the whole measuring and positioning process, the position of the immersed tube 2 to be installed relative to the installed immersed tube 1 can be calculated by matching the inclination of the immersed tube 2 to be installed with at least two sets of measuring ropes.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.