阅读说明：本技术 盾尾间隙监测装置 (Shield tail clearance monitoring device ) 是由 曾亮 刘哲 夏军勇 翟世鸿 许超 王珊珊 陈培帅 舒文强 邹心怡 狄飞超 余俊 于 2020-05-22 设计创作，主要内容包括：公开了一种盾尾间隙监测装置,包括：安装座(12),其包括固定在盾构机盾壳筋板(11)上的固定底板(1),和可拆卸地设置在固定底板(1)上的定位板(2)；盾尾间隙监测器(4),其固定在定位板(2)上,并使盾尾间隙监测器(4)中激光器的激光束从两个撑靴(9)之间的空隙(14)中投射出去。选择盾构机盾壳筋板(11)作为盾尾间隙监测装置的安装位置,不会与盾构机机械结构发生任何干涉；在盾构机正常掘进过程中液压油缸伸缩时,及管片拼装过程中拼装机旋转时,均不会影响盾尾间隙监测装置的正常工作,为盾尾间隙的实时和连续性测量提供了必要的前提条件。(Disclosed is a shield tail clearance monitoring device, including: the mounting seat (12) comprises a fixed bottom plate (1) fixed on a shield shell rib plate (11) of the shield machine and a positioning plate (2) detachably arranged on the fixed bottom plate (1); and the shield tail gap monitor (4) is fixed on the positioning plate (2) and enables the laser beam of the laser in the shield tail gap monitor (4) to be projected out of a gap (14) between the two supporting shoes (9). A shield shell rib plate (11) of the shield tunneling machine is selected as the mounting position of the shield tail clearance monitoring device, and no interference with a mechanical structure of the shield tunneling machine is caused; when the hydraulic oil cylinder stretches out and draws back in the normal tunneling process of the shield tunneling machine and the segment assembling machine rotates in the segment assembling process, the normal work of the shield tail gap monitoring device cannot be influenced, and necessary preconditions are provided for real-time and continuous measurement of the shield tail gap.)

1. The utility model provides a shield tail clearance monitoring devices which characterized in that includes:

the mounting seat (12) comprises a fixed bottom plate (1) fixed on a shield shell rib plate (11) of the shield machine and a positioning plate (2) detachably arranged on the fixed bottom plate (1);

and the shield tail gap monitor (4) is fixed on the positioning plate (2) and enables laser beams of a laser in the shield tail gap monitor (4) to be projected out of a gap (14) between the two supporting shoes (9).

2. The shield tail clearance monitoring device according to claim 1, wherein the shield tail clearance monitoring device is arranged on the shield shell rib plate (11) at four positions of 45 degrees, 135 degrees, 225 degrees and 315 degrees in the circumferential direction of the shield shell.

3. The shield tail clearance monitoring device according to claim 1, characterized in that the fixed bottom plate (1) is provided with a sliding groove (6) matched with the positioning plate (2), and the positioning plate (2) is fastened in the sliding groove (6) through a bolt.

4. Shield tail clearance monitoring device according to claim 1, characterized in that the horizontal centre line of the mounting seat (12) is parallel to the shield machine axis.

Technical Field

The utility model belongs to the technical field of shield construction, relate to shield construction monitoring instrument, in particular to shield tail clearance monitoring devices.

Background

With the requirement of large-scale construction of urban subway tunnels and other underground projects, shield construction technology and equipment are rapidly developed and applied. The shield tail clearance is a kind of key technical parameters which need to be accurately measured and monitored in real time in the shield tunneling construction process, and plays a vital role in controlling the attitude of the shield tunneling machine and ensuring the high efficiency, safety and the like of the shield construction. Specifically, the shield tail clearance refers to the clearance distance between the duct piece outer diameter and the shield shell inner diameter. When the shield tail clearance variation exceeds the set range, excessive extrusion can be caused between the shield tail and the pipe piece, the abrasion of the shield tail sealing brush is accelerated, the tunneling speed is reduced, and even the pipe piece is staggered or damaged, so that serious consequences such as tunnel leakage and ground surface settlement are caused. Therefore, real-time, continuous and periodic measurement of the shield tail clearance is necessary to ensure the efficiency and safety of shield construction.

The shield tail clearance measurement technology mainly adopts a manual measurement mode, which not only consumes manpower but also has poor precision. Some researchers have proposed some shield tail clearance measuring devices based on distance measuring instruments or laser measuring sensors, but the connection between the measuring devices and the shield machine body is mostly affected by a rotary segment assembling machine, a telescopic hydraulic oil cylinder and a support shoe, or interference occurs easily on a mechanical structure, or working conditions are limited when the shield machine tunnels and segments are assembled, and real-time and continuous measurement of the shield tail clearance cannot be realized.

Disclosure of Invention

The utility model provides a shield tail clearance monitoring devices overcomes the defect in aspects such as operating condition is limited that current monitoring devices mechanical structure interferes or because the installation is unreasonable to result in, reaches to carry out real-time and continuity measurement's purpose to shield tail clearance in shield tunnelling construction and section of jurisdiction assembling process.

An embodiment of the present disclosure provides a shield tail clearance monitoring device, including: the mounting seat comprises a fixed bottom plate fixed on a shield shell rib plate of the shield machine and a positioning plate detachably arranged on the fixed bottom plate; and the shield tail gap monitor is fixed on the positioning plate, and enables laser beams of a laser in the shield tail gap monitor to be projected from a gap between the two supporting shoes.

In some examples, the shield tail clearance monitoring device is arranged on the shield shell rib plates at four positions of 45 degrees, 135 degrees, 225 degrees and 315 degrees in the circumferential direction of the shield shell.

In some examples, the fixed bottom plate is provided with a sliding groove matched with the positioning plate, and the positioning plate is fastened in the sliding groove through a bolt.

In some examples, a horizontal centerline of the mount is parallel to a shield machine axis.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below.

Fig. 1 is a schematic structural view of a shield tail clearance monitoring device according to an embodiment of the present disclosure.

Fig. 2 is a schematic view of the shield tail clearance monitoring device shown in fig. 1 mounted on a shield shell rib plate of a shield machine.

Detailed Description

The shield tail clearance monitoring device is installed on a rib plate 11 of a shield shell of a shield machine. Specifically, a shield tail clearance monitoring device can be arranged on the shield shell rib plate 11 at four positions of 45 degrees, 135 degrees, 225 degrees and 315 degrees in the circumferential direction of the shield shell. The shield shell rib plate 11 of the shield tunneling machine is selected as the mounting position of the shield tail clearance monitoring device, and no interference with the mechanical structure of the shield tunneling machine is caused; when the hydraulic oil cylinder 10 stretches out and draws back in the normal tunneling process of the shield tunneling machine and the segment assembling machine rotates in the segment assembling process, the normal work of the shield tail gap monitoring device cannot be influenced, and necessary preconditions are provided for real-time and continuous measurement of the shield tail gap.

As shown in fig. 1 and 2, the shield tail clearance monitoring device includes a shield tail clearance monitor 4 and a mounting base 12. The mounting seat 12 comprises a fixed bottom plate 1 fixed on a shield shell rib plate 11 of the shield machine and a positioning plate 2 detachably arranged on the fixed bottom plate 1. The end face of the fixed bottom plate 1 abuts against the shield machine shell 13. The shield tail gap monitor 4 is fixed on the positioning plate 2, and the laser beam of the laser in the shield tail gap monitor 4 is projected from the gap 14 between the two supporting shoes 9. The expansion and contraction of the supporting shoes 9 and the hydraulic oil cylinder 10 cannot influence the normal work of the mounting base 12. The mounting seat 12 adopts a split structure consisting of the fixed bottom plate 1 and the positioning plate 2, is easy to accurately position and quickly disassemble and assemble, and can ensure the accurate measurement of the gap between the shield tails.

The fixed bottom plate 1 is provided with a sliding chute 6 matched with the positioning plate 2. The sliding groove 6 can be formed by angle steels 5 fixed at the left and right ends of the fixed bottom plate 1. And a side bolt hole 7 and a top bolt hole 8 are respectively arranged on the left end angle steel 5 and the right end angle steel 5. The positioning plate 2 is arranged in the sliding groove 6, and the positioning plate 2 is fastened in the sliding groove 6 through bolts in the side bolt holes 7 and the top bolt holes 8.

The installation method of the shield tail clearance monitoring device comprises the following steps:

determining a shield shell rib plate 11 of a shield machine for installing a mounting seat 12;

spot-welding the fixed bottom plate 1 of the mounting seat 12 on the rib plate 11, and enabling the horizontal center line 15 of the mounting seat 12 to be parallel to the axis of the shield tunneling machine;

fixing a shield tail gap monitor 4 on a positioning plate 2 of a mounting base 12 through a bolt, and fixing a laser range finder on a side plate 3 vertical to the positioning plate 2;

sliding the positioning plate 2 of the mounting seat 12 into the fixed bottom plate 1 along the sliding chute 6, and determining the position of the positioning plate 2 by using a principle that a laser beam emitted by a laser of the shield tail gap monitor 4 is projected to a proper position of the end face of the segment;

screwing down bolts in bolt holes 7 in the side surfaces of angle steels 5 at the left end and the right end of the fixed bottom plate 1 to enable the bolts to prop against the positioning plate 2;

and (3) screwing bolts in bolt holes 8 on the top surfaces of the angle steels 5 at the left end and the right end of the fixed bottom plate 1, so that the bolts tightly press the positioning plate 2, and the installation is completed.