Ballast bed debonding monitoring structure, ballast bed debonding and tunnel settlement monitoring and remediation structure

Abstract

The present invention relates to a ballast bed emptying monitoring structure, a ballast bed emptying and tunnel settlement monitoring and regulation structure. The purpose of the present invention is to provide a ballast bed emptying monitoring structure, a ballast bed emptying and tunnel settlement monitoring and regulation structure. The technical solution of the present invention is: a ballast bed emptying monitoring structure, used to monitor the gap between the ballast bed and the pipe segment in the tunnel, characterized in that: a plurality of monitoring holes vertically penetrating the ballast bed are provided along the center line of the ballast bed, a monitoring rod is coaxially inserted in the monitoring hole, the lower end of the monitoring rod is fixed on the pipe segment below, the upper end of the monitoring rod is exposed outside the monitoring hole, and the monitoring rod is provided with a scale that can cooperate with the monitoring hole to read the value to monitor the ballast bed emptying situation. The present invention is applicable to the field of underground transportation engineering.

Description

Technical Field

[0001] The invention relates to a roadbed hollowing monitoring structure, a roadbed hollowing and tunnel settlement monitoring and regulation structure, and is applicable to the field of underground transportation engineering. Background Art

[0002] With the rapid development of urban underground transportation, the progress of subway construction is accelerating, and subway tunnels are increasingly used in soft soil areas. Due to the characteristics of soft soil: high compressibility, high sensitivity, long consolidation time, etc., after the tunnel is put into operation, the post-construction settlement of the tunnel in the soft soil area is not stable and is still in a state of continuous settlement; or under the condition of train operation load and external construction disturbance, the soft soil layer under the tunnel is disturbed and the tunnel settles significantly. After the local settlement of the tunnel, the longitudinal curvature of the tunnel increases, and a gap is generated between the roadbed concrete and the segment structure, that is, the roadbed is empty, which poses a safety hazard during train driving.

[0003] Since the tunnel ballast is cast in concrete, the original grouting holes of the tunnel segments have been sealed by the ballast concrete structure, making it impossible to directly grout the bottom of the tunnel, and it is also impossible to detect whether there is a gap between the ballast concrete and the segment structure. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in view of the above-mentioned existing problems, a ballast bed emptying monitoring structure, a ballast bed emptying and tunnel settlement monitoring and regulation structure are provided.

[0005] The technical solution adopted by the present invention is: a ballast bed emptying monitoring structure, which is used to monitor the gap between the ballast bed and the pipe segment in the tunnel, and is characterized in that: a plurality of monitoring holes vertically penetrating the ballast bed are provided along the center line of the ballast bed, and a monitoring rod is coaxially inserted in the monitoring hole, the lower end of the monitoring rod is fixed on the pipe segment below, and the upper end of the monitoring rod is exposed outside the monitoring hole, and the monitoring rod is provided with a scale that can cooperate with the monitoring hole to read the value to monitor the ballast bed emptying situation.

[0006] An isolation layer is provided between the monitoring rod and the monitoring hole, which enables the monitoring rod to move axially smoothly in the monitoring hole.

[0007] The isolation layer is made of linoleum cloth.

[0008] The upper surface of the ballast bed is provided with a cylindrical groove corresponding to the monitoring hole and is provided with a rubber protective cover.

[0009] The monitoring rod is threadedly connected and fixed on the pipe segment.

[0010] A ballast bed degassing and tunnel settlement monitoring and regulation structure, characterized in that it includes the ballast bed degassing monitoring structure, wherein the monitoring rod of the ballast bed degassing monitoring structure adopts a hollow grouting pipe, and the grouting pipe is fixed on the pipe segment and connected with the corresponding grouting holes on the pipe segment.

[0011] A grouting outlet for grouting the gap between the ballast bed and the pipe segment is provided on the grouting pipe near the connection point between the grouting pipe and the grouting hole on the pipe segment.

[0012] Determine whether the ballast bed is empty according to the change of the value read from the scale on the outer wall of the grouting pipe in coordination with the monitoring hole;

[0013] When it is determined that the roadbed is hollow, grouting is carried out on the area below the segment through the grouting pipe in coordination with the grouting holes on the segment.

[0014] The beneficial effect of the present invention is that a monitoring rod with a scale is inserted into the ballast bed monitoring hole, the lower end of the monitoring rod is fixed on the pipe segment, and the ballast bed emptying situation is monitored by observing the scale on the monitoring rod corresponding to the monitoring hole opening.

[0015] In the present invention, the monitoring rod adopts a grouting pipe and is connected with the grouting hole on the pipe segment to form a grouting channel. When the roadbed of the observation track is emptied, grouting is injected into the area below the pipe segment through the grouting channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment.

[0017] Figure 2 Schematic diagram of the plan layout of the embodiment.

[0018] Figure 3 It is a partial enlarged view of the grouting pipe part in the embodiment.

[0019] 1. Grouting hole; 2. Monitoring hole; 3. Segment; 4. Ballast bed; 7. Connection point; 8. Isolation layer; 9. Scale; 10. Cylindrical groove; 11. Rubber protective cover. DETAILED DESCRIPTION

[0020] Embodiment 1: This embodiment is a ballast bed void monitoring structure for monitoring whether a gap is generated between the ballast bed and the pipe segment in a tunnel. A number of monitoring holes vertically penetrating the ballast bed are provided along the center line of the ballast bed. A monitoring rod is coaxially inserted in the monitoring hole. The lower end of the monitoring rod is threadedly connected and fixed on the pipe segment below, and the upper end of the monitoring rod is exposed outside the monitoring hole.

[0021] In this embodiment, the outer wall of the monitoring rod is provided with scales arranged along the axial direction of the monitoring rod, and the corresponding values ​​on the scales of the monitoring rod can be read by cooperating with the monitoring rod and the opening of the monitoring hole.

[0022] In this example, to ensure that the monitoring rod can smoothly move axially relative to the monitoring hole in the monitoring hole, an isolation layer is provided between the monitoring rod and the monitoring hole. In this embodiment, the isolation layer is made of linoleum cloth and is wrapped on the monitoring rod.

[0023] In order to protect the monitoring rod exposed outside the monitoring hole, in this example, a cylindrical groove is formed on the upper surface of the track bed corresponding to the monitoring hole and is equipped with a rubber protective cover.

[0024] The construction method of this embodiment is as follows:

[0025] After the shield segment is installed, the monitoring rod is connected and fixed to the segment before the ballast bed is poured;

[0026] The monitoring pole is covered with felt or other isolation measures before the ballast bed is poured;

[0027] After the ballast bed is poured, the ends of the monitoring holes are protected with rubber covers.

[0028] The working principle of this embodiment is as follows: regularly measure the scale of the monitoring rod corresponding to the monitoring hole opening, and judge whether the roadbed is empty according to the change of the scale.

[0029] Embodiment 2: This embodiment is a ballast degassing and tunnel settlement monitoring and control structure for monitoring ballast degassing and control of shield tunnel ballast degassing and tunnel settlement. A number of monitoring holes vertically penetrating the ballast are provided along the center line of the ballast. A hollow grouting pipe is coaxially inserted in the monitoring hole. The lower end of the grouting pipe is threadedly fixed on the lower segment and connected to the corresponding grouting hole on the segment. The upper end of the grouting pipe is exposed outside the monitoring hole.

[0030] In this embodiment, the outer wall of the grouting pipe is provided with scales arranged along the axial direction of the grouting pipe, and the grouting pipe cooperates with the orifice of the monitoring hole to read the corresponding value on the scale of the grouting pipe.

[0031] In this example, in order to ensure that the grouting pipe can smoothly move axially relative to the monitoring hole in the monitoring hole, an isolation layer is provided between the grouting pipe and the monitoring hole. In this embodiment, the isolation layer is made of tarpaulin and wrapped on the grouting pipe.

[0032] In order to protect the grouting pipe exposed outside the monitoring hole, in this example, a cylindrical groove is formed on the upper surface of the ballast corresponding to the monitoring hole and is equipped with a rubber protective cover.

[0033] The construction method of this embodiment is as follows:

[0034] Grouting holes are added to the standard blocks at the positions corresponding to the center line of the bottom of the shield tunnel segment;

[0035] After the shield segment is installed, the grouting pipe is connected and fixed to the segment and communicated with the grouting hole on the segment before the roadbed is poured;

[0036] The grouting pipe is covered with tarpaulin or other isolation measures before pouring the ballast bed;

[0037] After the ballast bed is poured, the ends of the monitoring holes are protected with rubber covers.

[0038] The working principle of this embodiment is as follows:

[0039] Regularly measure the scale of the grouting pipe corresponding to the orifice of the monitoring hole, and judge whether the roadbed is empty according to the scale change;

[0040] When the settlement deformation of the tunnel continues to fail to converge or the settlement deformation is large and the roadbed is empty, open the protective cover and carry out micro-disturbance grouting on the bottom of the tunnel through the grouting pipe and grouting holes. The specific grouting pressure and remediation standards shall be based on the design requirements.

Claims

1. A ballast bed gap monitoring structure, used to monitor the gap between the ballast bed and the segment in a tunnel, characterized by: A number of monitoring holes are vertically penetrated through the ballast bed along the center line of the ballast bed, and a monitoring rod is coaxially inserted in the monitoring hole. The lower end of the monitoring rod is fixed on the pipe segment below, and the upper end of the monitoring rod is exposed outside the monitoring hole. The monitoring rod is provided with a scale that can cooperate with the monitoring hole to read the value and thus monitor the ballast bed emptying situation.

2. The track bed degassing monitoring structure according to claim 1 is characterized in that: An isolation layer is provided between the monitoring rod and the monitoring hole, which enables the monitoring rod to move axially smoothly in the monitoring hole.

3. The track bed degassing monitoring structure according to claim 2 is characterized in that: The isolation layer is made of linoleum cloth.

4. The track bed degassing monitoring structure according to claim 1 is characterized in that: The upper surface of the ballast bed is provided with a cylindrical groove corresponding to the monitoring hole and is provided with a rubber protective cover.

5. The track bed emptying monitoring structure according to claim 1 is characterized in that: The monitoring rod is threadedly connected and fixed on the pipe segment.

6. A roadbed degassing and tunnel settlement monitoring and regulation structure, characterized by: It comprises the ballast bed hollowing monitoring structure as claimed in any one of claims 1 to 5, wherein the monitoring rod in the ballast bed hollowing monitoring structure adopts a hollow grouting pipe, the grouting pipe is fixed on the pipe segment and communicated with the corresponding grouting hole on the pipe segment.

7. The track bed degassing and tunnel settlement monitoring and regulation structure according to claim 6 is characterized by: A grouting outlet for grouting the gap between the ballast bed and the pipe segment is provided on the grouting pipe near the connection point between the grouting pipe and the grouting hole on the pipe segment.

8. The track bed degassing and tunnel settlement monitoring and regulation structure according to claim 6 is characterized by: Determine whether the ballast bed is empty according to the change of the value read from the scale on the outer wall of the grouting pipe in coordination with the monitoring hole; When it is determined that the roadbed is hollow, grouting is carried out on the area below the segment through the grouting pipe in coordination with the grouting holes on the segment.

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