CN-121977416-A - Monitoring device for internal deformation of concrete faced rockfill dam and application method thereof

Abstract

The invention belongs to the technical field of safety monitoring of a concrete faced rockfill dam, and particularly relates to a concrete faced rockfill dam internal deformation monitoring device and a using method thereof. Wherein, in the inside monitoring devices that warp of panel rock-fill dam, the bottom of lift measuring stick extends to the rock-fill body of panel rock-fill dam, and the bottom of lift measuring stick is provided with subsides anchor block, when the rock-fill body takes place vertical subsides, the rock-fill body can drive the synchronous vertical removal of lift measuring stick through subsides anchor block to through the change of scale value on the first scale line on the lift measuring stick, accurate and audio-visual show rock-fill body's deformation degree need not to carry out data cross analysis, in order to simplify the acquisition mode of rock-fill body deformation result in the panel rock-fill dam, and improve detection efficiency.

Inventors

• HUANG LIWEI
• CHE WEIBIN
• Luo Xuheng
• CHUN LIRONG
• WANG XIAOTANG
• WANG HUI
• WANG ZHANSHENG
• LIU MING
• WANG XIAOXIANG
• YIN HUAN

Assignees

• 中国水利水电第五工程局有限公司

Dates

Publication Date

20260505

Application Date

20260327

Claims (6)

1. 1. The device for monitoring the internal deformation of the face rockfill dam is characterized by comprising an outer cylinder (1) and a lifting measuring rod (3); the outer cylinder (1) is arranged on a concrete panel (6) of the concrete faced rockfill dam; the lifting measuring rod (3) is arranged in the outer cylinder (1) in a sliding manner along the axis direction of the outer cylinder (1), a first scale mark is arranged on the outer side wall of the lifting measuring rod (3), and the scale value of the first scale mark increases gradually from the middle part of the lifting measuring rod (3) to the top end of the lifting measuring rod (3), the bottom end of the lifting measuring rod (3) penetrates out of the outer cylinder (1) and extends into a rock-fill body (5) of the face rock-fill dam, and a settlement anchor block (33) is arranged at the bottom end of the lifting measuring rod (3); in the initial state, the zero line of the first scale mark is flush with the top end of the outer cylinder (1).
2. 2. The device for monitoring the internal deformation of the rock-fill dam according to claim 1, further comprising an inner cylinder (2); The outer diameter of the inner cylinder (2) is matched with the inner diameter of the outer cylinder (1), and the inner cylinder (2) is arranged in the outer cylinder (1) in a sliding manner along the axis direction of the outer cylinder (1); The middle part of the lifting measuring rod (3) is arranged in the inner cylinder (2), and the top end and the bottom end of the lifting measuring rod (3) respectively penetrate out from the two ends of the inner cylinder (2).
3. 3. The device for monitoring the internal deformation of the rock-fill dam according to claim 2, wherein the outer side wall of the inner cylinder (2) is provided with a guide block (21); The inner side wall of the outer cylinder (1) is provided with a guide groove (11), the length direction of the guide groove (11) is parallel to the axis of the outer cylinder (1), and a guide block (21) is slidably arranged in the guide groove (11) along the length direction of the guide groove (11).
4. 4. The device for monitoring the internal deformation of the concrete faced rockfill dam according to claim 1, wherein an annular limiting disc (12) is arranged on the outer side wall of the outer cylinder (1), and the axis of the limiting disc (12) coincides with the axis of the outer cylinder (1).
5. 5. The device for monitoring the internal deformation of a rock-fill dam according to claim 1, further comprising an offset measuring rod (4); the offset measuring rod (4) is arranged in the outer cylinder (1) in a sliding manner along the axis direction of the outer cylinder (1), a second scale mark is arranged on the outer side wall of the offset measuring rod (4), the scale value of the second scale mark is an angle conversion scale value, and the scale value of the second scale mark increases gradually from the middle part of the offset measuring rod (4) to the top end of the offset measuring rod (4); The lifting measuring rod (3) comprises a sliding rod (31) and a connecting rod (32), the sliding rod (31) is arranged in the outer cylinder (1) in a sliding mode along the axis direction of the outer cylinder (1), the first scale line is arranged on the sliding rod (31), a pin shaft (321) is fixedly arranged at the top end of the connecting rod (32), a gear (322) is fixedly arranged on the pin shaft (321), the gear (322) is meshed with the rack (41), and the connecting rod (32) is hinged to the bottom end of the sliding rod (31) through the pin shaft (321).
6. 6. A method for using the device for monitoring the deformation of the interior of a rock-fill dam according to any one of claims 1 to 5, comprising the steps of: In the filling construction stage of the rock-fill body (5), burying a settlement anchor block (33) according to a preset monitoring point position, and before pouring the concrete panel (6), fixing the outer cylinder (1) on the concrete panel (6) to enable the axis of the outer cylinder (1) to be consistent with the vertical direction, wherein the top end of the outer cylinder (1) is flush with the designed outer surface of the concrete panel (6); during the operation of the face rockfill dam, when the rockfill body (5) is subjected to sedimentation deformation, the rockfill body (5) drives the sedimentation anchor block (33) and the lifting measuring rod (3) to synchronously displace; And reading and recording the change of the scale of the first scale line on the lifting measuring rod (3) as vertical sedimentation data.

Description

Monitoring device for internal deformation of concrete faced rockfill dam and application method thereof Technical Field The invention belongs to the technical field of safety monitoring of a concrete faced rockfill dam, and particularly relates to a concrete faced rockfill dam internal deformation monitoring device and a using method thereof. Background The concrete face rockfill dam is one of dam types widely applied in the field of hydraulic and hydroelectric engineering, and comprises key components such as a rockfill body, a concrete face plate, a toe board and the like. The dam type has the core functions of providing stable bearing support through the rock-fill body, and simultaneously, blocking water flow permeation by means of the seepage-proofing performance of the concrete panel, so that multiple water conservancy benefits such as water storage, flood control, power generation, irrigation and the like are realized, and the dam type has important significance for regional water resource regulation and control, disaster prevention and reduction and economic and social development. In the long-term operation process of the face rockfill dam, the face rockfill dam is influenced by the structural characteristics and external loads, and the face rockfill dam is easy to deform, so that the safety of the face rockfill dam is threatened. The rock pile is formed by stacking granular rock from structural characteristics, natural gaps exist among the grains, the structural stability depends on contact and occlusion among the grains, the rock pile particles are rearranged and compacted due to long-term effects of dead weight of the dam body, water pressure generated by water storage and additional pressure caused by silt accumulation from the aspect of external load, vertical settlement is caused, and meanwhile, horizontal thrust, regional geological structure change, earthquake load and other factors generated by water level difference between the upper and lower sides of the dam body can also induce horizontal deviation or lateral deformation of the rock pile. If the deformation of the rock-fill body can not be monitored and controlled in time, the concrete panel can be cracked, the seepage-proofing performance can be invalid, and serious safety accidents such as dam leakage and instability can be even caused, so that the deformation of the rock-fill body in the concrete-fill dam can be monitored accurately in real time, and the concrete-fill dam is one of the core requirements for the safety operation guarantee of the concrete-fill dam. At present, the most common and similar implementation scheme for monitoring the deformation of a rock-fill body in a face rock-fill dam in industry is that a plurality of sedimentation pipes with different angles are installed at different positions of the rock-fill body (the key areas where vertical sedimentation and horizontal deflection possibly occur are covered), displacement data of the sedimentation pipes are observed one by manually and regularly going to a monitoring site, and then a plurality of groups of observation data are collected, sorted and cross-analyzed to finally indirectly judge the deformation degree and the deformation development trend. The core principle of the scheme is that the sedimentation pipes are used as displacement conduction carriers, deformation conditions of the rock-fill body are indirectly reflected through monitoring displacement of the sedimentation pipes, and the core operation flow comprises four key links of sedimentation pipe arrangement, manual regular observation, data cross analysis and deformation judgment, wherein the arrangement density and arrangement angle of the sedimentation pipes are planned according to the scale, structural characteristics and potential deformation risks of the rock-fill body, and the manual observation is required to follow a fixed period and unified standard so as to ensure comparability and accuracy of data. However, the monitoring result of the scheme is realized by a data cross analysis mode, and the technical problems of complex analysis mode and extremely low monitoring efficiency generally exist. Disclosure of Invention The invention provides a device for monitoring deformation in a rock-fill dam, which aims to solve the technical problems of complex analysis mode and extremely low monitoring efficiency in a rock-fill body deformation monitoring scheme in the rock-fill dam in the prior art. The invention is realized by the following technical scheme: The device for monitoring the internal deformation of the concrete faced rockfill dam comprises an outer cylinder and a lifting measuring rod; the outer cylinder is arranged on a concrete panel of the concrete faced rockfill dam; The bottom end of the lifting measuring rod penetrates out of the outer cylinder and extends into a rock-fill body of the face-fill dam, and the bottom end of the lifting measuring rod is provided with a settlement anch