CN-224214227-U - Knocking rod for checking secondary lining cavity of subway tunnel

Abstract

The utility model relates to the technical field of subway tunnel inspection knocking rods, and particularly discloses a subway tunnel secondary lining hole inspection knocking rod which comprises a handheld column, a knocking block fixedly connected to one end of the handheld column, a penetrating groove penetrating through the handheld column and an inspection rod detachably connected with the penetrating groove, wherein an accommodating groove for judging the types of holes is formed in the end part of the inspection rod.

Inventors

• Guan Liuliu
• SI SUNYI
• ZHANG MINGXING
• ZHOU HAO
• LI XIAOYU

Assignees

• 江苏省建筑工程质量检测中心有限公司

Dates

Publication Date

20260508

Application Date

20250620

Claims (5)

1. 1. The utility model provides a second lining cavity inspection of subway tunnel beats stick, its characterized in that, including handheld post, rigid coupling at handheld post one end beat the piece, run through the setting at the inside inspection stick that runs through of handheld post and can dismantle with the groove and be connected, the tip of inspection stick is provided with the holding tank that is used for judging the cavity kind.
2. 2. The subway tunnel secondary lining cavity inspection knocking rod according to claim 1, wherein the penetrating groove comprises a through groove and a threaded groove, the inspection rod comprises an inspection section, a threaded section and a rotating block from left to right in sequence, the inspection section, the threaded section and the rotating block are fixedly connected, the threaded section is in threaded connection with the threaded groove, the size of the rotating block is larger than that of the inspection section and the threaded section, and the accommodating groove is formed in the inspection section.
3. 3. The subway tunnel secondary lining cavity inspection knocking rod according to claim 2, wherein the inspection section includes an inspection column and an insertion head provided at an end of the inspection column, and the accommodation groove is opened on the inspection column.
4. 4. A subway tunnel secondary lining cavity inspection tapping rod according to claim 3, wherein the diameter of the inspection section is 20-30 mm.
5. 5. The subway tunnel secondary lining cavity inspection knocking rod according to claim 1 or 4, wherein the knocking block is made of metal and welded with a handheld column, and a ring-shaped anti-skid pattern is arranged at one end of the handheld column away from the knocking block.

Description

Knocking rod for checking secondary lining cavity of subway tunnel Technical Field The application relates to the technical field of subway tunnel inspection knocking rods, and particularly discloses a subway tunnel secondary lining cavity inspection knocking rod. Background The secondary lining cavity of the subway tunnel refers to an unfilled and compact area behind or in the secondary lining of the tunnel, which is usually caused by factors such as construction process, material performance or management omission, and the secondary lining refers to a molded concrete or reinforced concrete lining structure applied to the inner side of the tunnel on the basis of finishing primary support (namely primary lining) in tunnel engineering; The secondary lining cavity of the subway tunnel is formed by the general treatment method that loose concrete is chiseled out, a grouting pipe is buried, the cavity is filled by pressure grouting, and the annular construction joint is subjected to modified epoxy resin grouting at the later stage to prevent water leakage; Before treatment, a secondary lining hole inspection is needed, so that a knocking rod needs to be inspected by using a subway tunnel secondary lining hole, and the secondary lining hole detection rod is a tool special for detecting whether a hole exists in the secondary lining of the tunnel. It is usually made of metal or plastic and has a certain length and rigidity so as to be capable of penetrating into the lining for detection, and the secondary lining cavity detection rod is a tool specially used for detecting whether a cavity exists in the secondary lining of a tunnel. It is usually made of metal or plastic, with a certain length and rigidity so as to be able to penetrate inside the lining for detection; Through inserting the detection rod into the reserved holes or gaps on the surface of the lining, detection personnel can judge whether a cavity exists in the lining. If the detection rod can be successfully inserted and reaches a certain depth, the detection rod is indicated to have a possible cavity, and if the detection rod is resistant or can not be inserted, the detection rod is indicated to have a compact lining; Chinese patent publication No. CN213869900U discloses a second lining hollow inspection knocking rod for tunnel, which comprises a rod body made of steel pipe, a handle fixed on the rod body, a steel bar welded on the top of the rod body, the diameter of the steel bar being the same as the inner diameter of the steel pipe, a steel cone welded on the bottom of the rod body at the big head end of the steel cone. The device has the advantages that whether the cavity exists after the second lining of the tunnel is identified by knocking the sound emitted by the second lining of the tunnel, if the concrete of the second lining is knocked to be compact, the crisp sound can be emitted, if the cavity exists, the smoky sound can be emitted, and the honeycomb pitting surface condition of the second lining can be checked. The device also has the advantages of simple structure, convenient use, rapidness, convenience, high efficiency and the like; The above patent has the following problems: The sound obtained by knocking is only one form, the secondary lining concrete is needed to be compact, the fact that the secondary lining concrete is compact shows that the hollow phenomenon is avoided, and if the sound obtained by knocking is not significant at the moment; If there is an unfilled dense area in the secondary lining, such as insufficient pouring and slurry leakage, the sound is obtained by knocking, which is easily damaged, because the position is not filled sufficiently dense, and the unfilled dense area is troublesome to judge by knocking, because if the area is small, the knocking is a mixture of dense sound and non-dense sound, and an operator can hardly judge whether there is a non-dense area at the position, so that the adopted knocking is used for checking the hollow of the unfilled dense area only for a large range, and the accuracy is suddenly reduced for judging small hollow, therefore, the inventor provides a knocking rod for checking the hollow of the secondary lining of the subway tunnel, so as to solve the problems. Disclosure of utility model The utility model aims to solve the problems that the traditional checking rod for judging the cavity by knocking to obtain sound is only suitable for a large-range cavity checking and is not suitable for a small-range cavity checking. In order to achieve the above object, the present utility model provides the following basic scheme: The utility model provides a subway tunnel two lining cavity inspection beats stick, including handheld post, rigid coupling at handheld post one end beat the piece, run through the setting at the inside inspection stick that runs through groove and can dismantle with the groove of running through of handheld post and be connected, the tip of inspection stick is