CN205537635U - Simple and easy control survey system in long distance straight line push pipe center - Google Patents

Abstract

The utility model relates to the technical field of pipe jacking measurement, in particular to a long-distance linear pipe jacking center simple control measurement system, which includes a pipe jacking, a laser pointer and an adjustable pen stand device, and several There are two adjustable pen holders and laser pointers distributed at equal intervals. The laser emission direction of the laser pointers is uniformly pointed to the direction of pipe jacking. There is a measuring instrument in the working well. The coincidence is in the same straight line, a target is set at the center of the pipe jacking head, and the laser pointer close to the pipe jacking head points to the center of the target, so as to control the left, right, up and down deviation of the jacking head. The utility model can greatly shorten each downhole measurement time, reduce the downhole measurement work intensity, not delay the jacking construction of each section of pipe, speed up the construction progress, save instrument investment cost, facilitate maintenance, and can effectively reduce the measurement working time.

Description

A simple control and measurement system for long-distance linear pipe jacking center

[technical field]

The utility model relates to the technical field of pipe jacking measurement, in particular to a simple control and measurement system for long-distance linear pipe jacking centers.

[Background technique]

In the pipe jacking construction, in order to ensure the correct penetration into the hole, it is necessary to control the direction of the excavation of the machine head along with the jacking of each section of the pipe so as not to deviate up, down, left, or right. It is mostly controlled by the method of dialing the angle with the laser theodolite or measuring the coordinates with the total station.

With the existing technical method of measuring the center line of long-distance pipe jacking, the vertical deviation is basically measured by the level instrument, and the theodolite or the total station is manually (automatically) transferred multiple times in the pipe, and finally measured to the target at the center of the nose , so as to determine the left-right deviation of the centerline of the jacking pipe. However, manual measurement using theodolite or total station is not only time-consuming, but also easy to cause waste of man-hours, and the automatic guiding measurement system is expensive, which increases the cost of the entire project, thus causing unnecessary waste to the project.

[utility model content]

The utility model aims to solve the problems of long-distance linear pipe jacking manual measurement time-consuming and high automatic measurement cost in the prior art, and designs a simple and convenient long-distance linear pipe jacking center simple control measurement system.

In order to achieve the above purpose, a simple control and measurement system for the center of the long-distance linear pipe jacking is designed, including a pipe jacking, a laser pointer and an adjustable pen holder. Several adjustable pen holders distributed at equal intervals are installed on the center line of the jacking pipe. And the laser pointer, the laser emission direction of the laser pointer is unified to the direction of pipe jacking. There is a measuring instrument in the working well, and the centerline of the pipeline is established by the measuring instrument, so that each laser pointer and the centerline of the pipeline coincide in the same straight line.

There is a target at the center of the pipe jacking head, and the laser pointer close to the pipe jacking head points to the center of the target, thereby controlling the left, right, up and down deviation of the pipe jacking head.

The surveying instrument is a theodolite or a total station.

A reflective sheet is provided at the center of the tail end of the laser pointer, and the center of the reflective sheet and the center of the light beam emitted from the front end are located on the same straight line.

Compared with the existing traditional cave measurement technology, the utility model has the advantages of:

1. It can greatly shorten the time of each downhole measurement, reduce the intensity of downhole measurement work, do not delay the jacking construction of each section of pipe, and speed up the construction progress;

2. There is no need to rotate points in the tube, avoiding secondary or even N times of rotating points, so that the error caused by multiple transfer stations is minimized;

3. Save the investment cost of the instrument, only need an ordinary theodolite or a total station, no need to configure an expensive total station with a laser or an automatic motor;

4. Easy to maintain, the laser pointer is cheap and easy to replace;

4. There is no need to use a level instrument for height measurement, which effectively reduces the working time of measurement;

6. The deviation results are displayed in real time without conversion.

[Description of drawings]

Fig. 1 is the measuring schematic diagram of the utility model;

Figure 2 is a schematic diagram of the deviation between the target center of the machine head and the laser point;

In the figure: 1. Working well 2. Measuring instrument 3. Forced centering device 4. Adjustable pen holder 5. Laser pointer 6. Visible laser beam 7. Machine head target 8. Pipe jacking head 9. Visible laser point 10. Nose target center;

[detailed description]

Below in conjunction with accompanying drawing, the utility model is further described, and the structure and principle of this device are very clear to those skilled in the art. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Example 1

As shown in Figure 1, the long-distance linear pipe jacking center simple control measurement system includes pipe jacking, a laser pointer and an adjustable pen holder. Several adjustable pen holders and laser pointers are installed at the center line of the jacking pipe. The laser pointer The laser emitting direction of the laser points to the direction of pipe jacking uniformly. There is a measuring instrument in the working well, and the center line of the pipeline is established by the measuring instrument, so that each laser pointer and the center line of the pipeline coincide in the same straight line. Target, the laser pointer close to the pipe jacking head points to the center of the target, so as to control the left, right, up and down deviation of the pipe jacking head.

The measurement method is as follows: install an adjustable pen holder at the center line of the pipe top at a certain distance and a laser pointer with the laser pointing to the jacking direction uniformly, use the laser theodolite in the working well to establish the pipeline centerline beam to point to the center of the tail end of the laser pointer, and turn on the laser pointer Light source, adjust the relative position of each laser pointer, so that each laser pointer coincides with the center line of the pipeline in the same straight line, and the first laser pointer points to the preset target center at the center of the machine head, so as to control the left, right, up and down deflection of the pipe jacking head bit.

The specific method steps are as follows:

a. Install the adjustable pen stand, and determine the specific tube section where the adjustable pen stand will be installed on the ground according to the distance of the beam emitted by the laser pointer you choose. Divide the center of the tube according to the two lifting holes, and place the up, down, left, and right adjustable pen holders. The middle part of the inner wall of the seat installation pipe, see Figure 1;

b. Renovation of the tail end of the laser pointer. Center the tail end of the laser pointer with a cross, determine the center point, and attach a reflective sheet. The center of the reflective sheet and the center of the beam emitted by the front end are on the same straight line;

c. Install and debug the laser pointer, install and adjust the relative position of the laser pointer in sequence from the back to the front end of the machine according to the instrument that is built in the working well and pointed in the correct direction, so that each laser pointer is located on an absolute straight line;

d. Measurement, use the time of each welding pipe joint to confirm that the instrument at the working well is pointing in the correct direction, and the surveyor enters the tube to check whether the position of the laser tube has moved slightly. If it moves, use the adjustable pen holder to adjust it back. The surveyor At the nose of the machine, measure the distance between the center of the machine head target and the laser point with a triangular plate, and then determine the specific value of the left, right, up and down deviation of the center line, and feed it back to the machine room, see Figure 2.

Example 1

Take Shanghai Minfeng Sub-line Pipe Jacking Project C4 as an example. Minfeng Branch Line C4 is marked as a part of the raw water pipeline from Minfeng Water Dividing Point to Fengxian’s existing Huangpu River Intake Pumping Station. #The top section of the well is the diameter 2600mm long and 960m straight line 4‰ uphill top section, which belongs to long-distance pipe jacking construction. Since the pipe joints follow up with the extension of the top section during pipe jacking construction, it belongs to dynamic measurement and must be jacked in one direction To the exit well, the accuracy of the measurement in the pipe is required to be high. There is 2 hours of spare time for real-time measurement of each pipe section from hoisting, installation to top opening. The traditional measurement method takes a long time, the accuracy of the turning point in the hole cannot be guaranteed, the operation of the measurement personnel is relatively complicated, and the measurement by the automatic guiding system The cost of the method is too high, and the top section of this section is a straight line, so the method in the utility model is used for measurement. The measurement inside the pipe jacking project requires 24-hour uninterrupted measurement by surveyors. Basically, every time one or two sections of pipe are jacked, the center deviation measurement of the machine head must be carried out. The traditional measurement method is not used in this top section to reduce the turning point. Incoming errors ensure the accuracy of measurement results and save labor costs. This method is used for the measurement of the top section of the straight line in the hole, and at the same time, it is compared with the traditional method of turning point measurement in the hole, so as to further determine the advantages and disadvantages of this method, such as accuracy, time and so on.

Claims (4)

1. A simple control and measurement system for the center of a long-distance linear pipe jacking, comprising a pipe jacking, a laser pointer and an adjustable pen holder, characterized in that several equally spaced adjustable pen holders and pen holders are installed on the center line of the pipe jacking Laser pointer, the laser emission direction of the laser pointer is uniformly pointed to the direction of pipe jacking. There is a measuring instrument in the working well, and the centerline of the pipeline is established by the measuring instrument, so that each laser pointer and the centerline of the pipeline coincide in the same straight line. 2. A simple control and measurement system for long-distance linear pipe jacking center as claimed in claim 1, characterized in that a target is set at the center of the pipe jacking head, and the laser pointer close to the pipe jacking head points to the center of the target, thereby controlling the pipe jacking The left, right, up and down position of the pipe head. 3. A simple control and measurement system for long-distance linear pipe jacking center as claimed in claim 1, characterized in that said measuring instrument is a theodolite or a total station. 4. A simple control and measurement system for the long-distance linear pipe jacking center as claimed in claim 1, characterized in that a reflective sheet is provided at the center of the tail end of the laser pointer, and the center of the reflective sheet is located at the same center as the center of the light beam emitted by the front end. in a straight line.