阅读说明：本技术 一种钻爆法隧道监测元器件测量电缆的防护方法与装置 (Protection method and device for measuring cable of tunnel monitoring component by drilling and blasting method ) 是由 种玉配 刘永胜 姚士磊 刘龙卫 杨效广 熊炎林 邵阳 杨朝帅 代昱昊 尚伟 于 2020-12-14 设计创作，主要内容包括：本发明公开了一种钻爆法隧道监测元器件测量电缆的防护方法与装置,该方法如下：步骤一、将监测元器件设置于围岩上,将“L”形保护管的横管的一端垂直、并固定于监测元器件位置处的隧道初支钢拱架上,“L”形保护管的纵管沿隧道纵向走向设置；步骤二、在“L”形保护管的纵管后纵向设置一PVC管；步骤三、喷射初支混凝土后,PVC管的底部部分位于初支混凝土内,将PVC管由初支混凝土内取出,在PVC管原设置位置处形成一凹槽；步骤四、将由“L”形保护管的纵管后端导出的测量电缆纵向穿过凹槽,在凹槽上方覆盖一保护板。通过该方法可以有效的避免监测元器件测量电缆的破坏,保证监测元器件的长期有效使用。(The invention discloses a protection method and a device for a tunnel monitoring component measuring cable by a drilling and blasting method, wherein the method comprises the following steps: firstly, arranging a monitoring component on surrounding rock, enabling one end of a transverse pipe of an L-shaped protection pipe to be vertical and fixed on a primary support steel arch frame of a tunnel at the position of the monitoring component, and enabling a longitudinal pipe of the L-shaped protection pipe to be arranged along the longitudinal direction of the tunnel; step two, longitudinally arranging a PVC pipe behind the longitudinal pipe of the L-shaped protection pipe; after the primary concrete is sprayed, the bottom part of the PVC pipe is positioned in the primary concrete, the PVC pipe is taken out of the primary concrete, and a groove is formed at the original position of the PVC pipe; and step four, longitudinally penetrating the measuring cable led out from the rear end of the longitudinal pipe of the L-shaped protection pipe through the groove, and covering a protection plate above the groove. The method can effectively avoid the damage of the monitoring component measuring cable and ensure the long-term effective use of the monitoring component.)

1. A protection method for a tunnel monitoring component measuring cable by a drilling and blasting method is characterized by comprising the following steps:

the method comprises the following steps that firstly, a monitoring component (9) is arranged on surrounding rocks, one end of a transverse pipe of an L-shaped protection pipe (11) is perpendicular to and fixed on a primary tunnel support steel arch frame at the position of the monitoring component (9), and a longitudinal pipe of the L-shaped protection pipe (11) is arranged along the longitudinal direction of a tunnel; a measuring cable (10) of the monitoring component (9) is penetrated through a transverse pipe of an L-shaped protection pipe (11) and is led out from the rear end of a longitudinal pipe;

step two, longitudinally arranging a PVC pipe behind a longitudinal pipe of the L-shaped protection pipe (11), wherein the distance between the PVC pipe and a tunnel primary support steel arch is smaller than the length of a transverse pipe of the L-shaped protection pipe (11);

thirdly, spraying primary support concrete, and after spraying is finished, positioning the transverse pipe of the L-shaped protection pipe (11) in the primary support concrete; the bottom part of the PVC pipe is positioned in the primary concrete, the PVC pipe is taken out of the primary concrete, and a groove is formed at the original arrangement position of the PVC pipe;

and fourthly, longitudinally penetrating the measuring cable led out from the rear end of the longitudinal pipe of the L-shaped protection pipe (11) through a groove, and covering a protection plate (5) above the groove.

2. The protection construction method for the measuring cable of the drilling and blasting tunnel monitoring component as claimed in claim 1, wherein the protection plate (5) is a plate body which is concave outwards along the central axis of the inner wall, and the width of the concave space is not more than that of the groove; a plastic foam plate (4) is longitudinally arranged in the outer concave space in a penetrating manner, and a clamping groove is longitudinally formed in the plastic foam plate (4) and used for clamping a measuring cable (10).

3. The protection construction method for the measuring cable of the drilling and blasting tunnel monitoring component according to claim 1 or 2, wherein the measuring cable is coated with a layer of geotextile.

4. The protection construction method for the measuring cable of the drilling and blasting tunnel monitoring component according to claim 1, wherein the front side and the rear side of the bent part of the L-shaped protection tube (11) are both arc-shaped.

5. The utility model provides a protector of brill method tunnel monitoring components and parts measuring cable that explodes which characterized in that includes:

the L-shaped protection tube (11) is a tube body with two open ends;

the protective plate (5) is a plate body which is concave outwards along the central axis of the inner wall and is detachably connected to the rear end of the longitudinal pipe of the L-shaped protective pipe (11);

the foam board (4) is longitudinally arranged in the outer concave space on the inner side of the protection board, and a clamping groove is longitudinally formed in the foam board and used for clamping the measuring cable (10).

[ technical field ] A method for producing a semiconductor device

The invention belongs to the technical field of tunnel engineering construction, and particularly relates to a protection method and device for a measuring cable of a tunnel monitoring component by a drilling and blasting method.

[ background of the invention ]

In the tunnel construction process, in order to guarantee the safety of tunnel and constructor, equipment in the work progress, need monitor the country rock stability in tunnel. Monitoring components are generally buried behind the primary support structure of the tunnel and in the steel arch, and then measuring cables of the monitoring components are led to the back of the tunnel face for data acquisition and analysis. The tunnel adopts the brill method of exploding to be under construction, and the stone that the tunnel blasting produced and shock wave destroy monitoring components and parts measuring cable easily, if measuring cable is just drawn forth primary surface position and is destroyed, will cause measuring cable wiring difficulty, influence data acquisition, can not in time provide country rock stability evaluation data, can lead to monitoring components and parts to lose effect when serious. Therefore, a protection device and a protection method for protecting the measuring cable in the blasting environment are needed.

[ summary of the invention ]

The invention aims to provide a protection method and a protection device for a tunnel monitoring component measuring cable by a drilling and blasting method, which can effectively avoid the damage of the monitoring component measuring cable, can provide surrounding rock stability evaluation data in time, can ensure the long-term effective use of the monitoring component, and particularly has more obvious protection effect on the monitoring component which needs to continuously play a role in the operation period.

The invention adopts the following technical scheme: a protection method for a tunnel monitoring component measuring cable by a drilling and blasting method comprises the following steps:

firstly, arranging a monitoring component on surrounding rock, enabling one end of a transverse pipe of an L-shaped protection pipe to be vertical and fixed on a primary support steel arch frame of a tunnel at the position of the monitoring component, and enabling a longitudinal pipe of the L-shaped protection pipe to be arranged along the longitudinal direction of the tunnel; a measuring cable of a monitoring component is penetrated through a transverse pipe of an L-shaped protection pipe and is led out from the rear end of a longitudinal pipe;

step two, longitudinally arranging a PVC pipe behind a longitudinal pipe of the L-shaped protection pipe, wherein the distance between the PVC pipe and a primary support steel arch frame of the tunnel is less than the length of a transverse pipe of the L-shaped protection pipe;

thirdly, spraying primary concrete, and after spraying is finished, positioning a transverse pipe of the L-shaped protection pipe in the primary concrete; the bottom part of the PVC pipe is positioned in the primary concrete, the PVC pipe is taken out of the primary concrete, and a groove is formed at the original arrangement position of the PVC pipe;

and step four, longitudinally penetrating the measuring cable led out from the rear end of the longitudinal pipe of the L-shaped protection pipe through the groove, and covering a protection plate above the groove.

Furthermore, the protection plate is a plate body which is concave outwards along the central axis of the inner wall, and the width of the concave space is not more than that of the groove; a plastic foam board is longitudinally arranged in the outer concave space in a penetrating way, and a clamping groove is longitudinally arranged on the plastic foam board and used for clamping the measuring cable.

Further, a layer of geotextile is coated on the measuring cable.

Furthermore, the front side and the rear side of the bending part of the L-shaped protection pipe are both arc-shaped.

The invention also discloses a protection device for the measuring cable of the tunnel monitoring component by the drilling and blasting method, which comprises the following steps:

the L-shaped protection tube is a tube body with two open ends;

the protective plate is a plate body which is concave outwards along the central axis of the inner wall and is detachably connected to the rear end of the longitudinal pipe of the L-shaped protective pipe;

the foam board is longitudinally arranged in the outer concave space on the inner side of the protection board, and a clamping groove is longitudinally formed in the foam board and used for clamping the measuring cable.

The invention has the beneficial effects that: 1. the L-shaped protection tube can effectively prevent the monitoring component measuring cable from being damaged from the primary interface, so that the monitoring component is prevented from being abandoned. 2. The measuring cable derived from the primary interface is arranged in the groove, the protective plate covers the upper portion of the groove, blasting flyrock and blasting impact wave energy can be effectively buffered and absorbed, and the measuring cable is effectively prevented from being damaged.

[ description of the drawings ]

FIG. 1 is a view of the protection burying of a monitoring component measuring cable;

FIG. 2 is a cross-sectional view of the protective device along the primary concrete face;

FIG. 3 is a cross-sectional view of the protective device deployed along the primary concrete face.

Wherein: 3. geotextile, 4. plastic foam plates, 5. protective plates, 7. primary concrete surfaces, 8. expansion screws, 9. monitoring components, 10. measuring cables and 11. L-shaped protective tubes.

[ detailed description ] embodiments

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

The embodiment discloses a protection method for a measuring cable of a tunnel monitoring component by a drilling and blasting method, wherein the selection of the monitoring component is determined according to a tunnel monitoring project, and if the pressure of surrounding rock is measured, a pressure box is selected; if the axial force deformation of the anchor rod is measured, a steel bar strain gauge is selected.

The protection method for the measuring cable of the tunnel monitoring component by the drilling and blasting method comprises the following steps:

firstly, arranging a monitoring component 9 on surrounding rock, enabling one end of a transverse pipe of an L-shaped protection pipe 11 to be vertical and fixed on a primary support steel arch frame of a tunnel at the position of the monitoring component 9, and enabling a longitudinal pipe of the L-shaped protection pipe 11 to be arranged along the longitudinal direction of the tunnel; a measuring cable 10 of the monitoring component 9 is penetrated through a transverse pipe of an L-shaped protection pipe 11 and is led out from the rear end of a longitudinal pipe; as shown in fig. 1 and 3. The front and rear of the bending part of the L-shaped protection pipe 11 are arc-shaped.

The monitoring component 9 that uses can be fixed in on the country rock, like the pressure cell, can adopt the anchoring agent to be fixed in on the country rock, perhaps adopts the support supplementary, and the card of one end of support is held and is fixed in on the pressure cell, and the other end is connected with the steel bow member, after fixing monitoring component 9, penetrates the measuring cable in "L" shape protection tube 11 by the front end to derive by the vertical pipe. Then the front end of the L-shaped protection pipe 11 is vertical and fixed on the steel arch of the primary support structure.

And step two, longitudinally arranging a PVC pipe behind the longitudinal pipe of the L-shaped protection pipe 11, wherein the distance between the PVC pipe and the tunnel primary support steel arch is less than the length of the transverse pipe of the L-shaped protection pipe 11. The PVC pipe is longitudinally arranged and can be bound by a thin iron wire which is easy to cut off, and the other end of the thin iron wire is fixed on the steel arch frame. The PVC pipe is intended to be pre-spacious and, after the concrete is sprayed, it is located within the concrete near the primary concrete face 7.

When selecting PVC pipe, the length is typically around 5 meters, and the open end of the longitudinal pipe faces the sprayed concrete section.

Thirdly, spraying primary support concrete, and after spraying is finished, positioning the transverse pipe of the L-shaped protection pipe 11 in the primary support concrete; the bottom part of the PVC pipe is positioned in the primary concrete, the PVC pipe is taken out from the primary concrete, and a groove is formed at the original arrangement position of the PVC pipe. When the PVC pipe is taken, the concrete is in a solidified state but not dried, and can be taken down in a prying mode, and the principle is that the concrete at other parts cannot be deducted as much as possible in the taking-down process.

And step four, longitudinally penetrating the measuring cable led out from the rear end of the longitudinal pipe of the L-shaped protection pipe 11 through the groove to the end part of the groove. The monitoring component measuring cable is easily damaged by stones and shock waves generated by tunnel blasting, so that the cable in the groove needs to be protected. The cable is first covered with geotextile and then covered with a protective sheet 5 over the groove. This protection shield 5 is the plate body of outside concave along inner wall axis department, and the width in outer concave space is not more than the width of recess.

As shown in figure 2, the two sides of the plate body are both provided with wing plates, when in use, the plate body crosses the two sides of the groove, the wing plates are attached to the primary support surface at the edge of the groove, and the wing plates are fixed on the primary support surface by using expansion screws 8. A plastic foam board 4 is longitudinally arranged in the outer concave space in a penetrating mode, the plastic foam board 4 is embedded in the groove to fill the whole groove, and a clamping groove is longitudinally formed in the plastic foam board 4 and used for clamping the measuring cable 10 to play a role in supporting and protecting the measuring cable 10. The end of the measuring cable 10 is used to connect a recording instrument to monitor the transmitted data.

Another embodiment of the present invention is a protection device for a measuring cable of a tunnel monitoring component by a drilling and blasting method, which is used in the protection method, and the protection device includes: the L-shaped protection tube 11 is a tube body with two open ends. The "L" shaped protective tube 11 can be made of PVC, and the inner diameter is selected according to the diameter of the cable to be measured, and the number of cables is also considered.

The protective plate 5 is a plate body which is concave outwards along the central axis of the inner wall and is detachably connected to the rear end of the longitudinal pipe of the L-shaped protective pipe 11. The protective plate 5 may be a steel plate. The end of the protection plate 5 may be opened with a plurality of through-holes, and the end of the "L" -shaped protection tube 11 may be provided with a plurality of protrusions to be caught in the through-holes. Any other way of achieving connection is also possible. The measuring cable also comprises a plastic foam plate 4 which is longitudinally arranged in the outer concave space at the inner side of the protective plate, and a clamping groove is longitudinally arranged on the foam plate and used for clamping the measuring cable 10.

In the present invention, the use of the "L" shaped protective tube 11 avoids the damage of the measuring cable when it is led out from the inside of the primary concrete. After the measuring cable is led out, the measuring cable is arranged in the groove and is covered and protected by the protective plate 5, so that the energy of blasting flyrock and blasting shock wave can be effectively buffered and absorbed, and the measuring cable 10 can be effectively prevented from being damaged.