CN-121993221-A - Assembled lining structure for electric tunnel and construction method of lining structure

CN121993221ACN 121993221 ACN121993221 ACN 121993221ACN-121993221-A

Abstract

The application provides an assembled lining structure for an electric tunnel and a construction method of the lining structure, which belong to the technical field of tunnel construction and comprise a plurality of prefabricated duct pieces, a plurality of assembling mechanisms and a plurality of grouting mechanisms; the device comprises a power tunnel, a plurality of prefabricated pipe pieces, a plurality of assembling mechanisms, a plurality of grouting mechanisms and a plurality of grouting mechanisms, wherein the prefabricated pipe pieces are connected end to end along the inner periphery of the power tunnel, one side of each prefabricated pipe piece facing the inner wall of the power tunnel is connected with the inner wall of the power tunnel to form an annular supporting structure matched with the inner wall of the power tunnel, the assembling mechanisms respectively correspond to the prefabricated pipe pieces and are positioned between two adjacent prefabricated pipe pieces, the assembling mechanisms are used for fixing the two adjacent prefabricated pipe pieces, the grouting mechanisms respectively correspond to the prefabricated pipe pieces, and each grouting mechanism is arranged at a joint of the two adjacent prefabricated pipe pieces. The assembled lining structure for the electric tunnel and the construction method of the lining structure provided by the application can realize quick assembly and long-term waterproof, greatly shorten the support construction period and improve the construction efficiency.

Inventors

GAO FAN
MA CONG
GUO JIYUAN
REN YU
LI CHU
ZHANG TENG
CHEN LIRONG
GONG SHIJIE
LI YUAN
LV FANG
LI HONGBO
REN JIANYONG
DING YUNFEI
ZHU ZHENGGUO
CHAI LINJIE
LIU BOWEN
LIU JIAN
WANG LIHUAN
REN YANING

Assignees

国网河北省电力有限公司经济技术研究院
石家庄铁道大学

Dates

Publication Date: 20260508
Application Date: 20260209

Claims (10)

1. Assembled lining structure for electric power tunnel, its characterized in that includes: The prefabricated pipe pieces are connected end to end along the inner periphery of the electric power tunnel, and each prefabricated pipe piece is connected with the inner wall of the electric power tunnel to form an annular supporting structure matched with the inner wall of the electric power tunnel; the splicing mechanisms are respectively corresponding to the prefabricated pipe pieces and are positioned between two adjacent prefabricated pipe pieces, are used for fixing the two adjacent prefabricated pipe pieces, and are used for fixing the prefabricated pipe pieces The grouting devices are respectively corresponding to the prefabricated duct pieces and are arranged at the joint of the two adjacent prefabricated duct pieces, and the grouting devices are used for injecting waterproof slurry into the joint of the two adjacent prefabricated duct pieces.
2. The fabricated lining structure for a power tunnel according to claim 1, wherein the assembly mechanism comprises: The mortise and tenon mechanism is arranged between two adjacent prefabricated duct pieces and can restrict the two adjacent prefabricated duct pieces together through a geometric structure, and And when the two adjacent prefabricated duct pieces are connected, the locking mechanism is suitable for locking the positions of the two prefabricated duct pieces.
3. The fabricated lining structure for a power tunnel according to claim 2, wherein the mortise and tenon mechanism includes: A tenon arranged at one end of the prefabricated segment along the arrangement direction of the prefabricated segment, and The mortise is arranged at the other end of the prefabricated duct piece; When two adjacent prefabricated duct pieces are connected, the tenon is suitable for being embedded into the mortise so as to fix the two adjacent prefabricated duct pieces along the radial direction of the electric power tunnel.
4. The fabricated lining structure for a power tunnel according to claim 3, wherein a plurality of tenons and a plurality of mortise grooves are provided at both ends of each prefabricated segment in an arrangement direction of the prefabricated segments, and the tenons and the mortise grooves are alternately arranged in a thickness direction of the prefabricated segments; when two adjacent prefabricated duct pieces are connected, the tenon at the end of each prefabricated duct piece is suitable for being embedded into the mortise at the end of the other prefabricated duct piece.
5. A fabricated lining structure for a power tunnel according to claim 3, wherein said locking mechanism comprises: A plurality of inserting rods which are arranged in the mortise at intervals along the width direction of the prefabricated pipe piece and the axial direction of each inserting rod is perpendicular to the end face of the prefabricated pipe piece, and The slots are arranged on the rabbet at intervals along the width direction of the prefabricated pipe piece, and the axial direction of each slot is perpendicular to the end face of the prefabricated pipe piece; When two adjacent prefabricated pipe pieces are connected, each inserting rod is suitable for being inserted into the corresponding slot, and the clamping component is suitable for locking the inserting rod in the slot.
6. The fabricated lining structure for a power tunnel according to claim 5, wherein an end of the insert rod facing away from the mortise slot is provided with a ball head coaxially arranged.
7. The fabricated lining structure for a power tunnel according to claim 6, wherein the clip member comprises: The annular clamping ring is coaxially fixed in the slot, and a plurality of cards are arranged on the inner peripheral wall of the annular clamping ring at intervals along the circumferential direction; A gasket coaxially slidably connected within the socket and positioned between the annular collar and the inner bottom surface of the socket, and The compression spring is arranged in the slot, and two ends of the compression spring are respectively connected with the gasket and the inner bottom surface of the slot; When the inserted link is inserted into the corresponding slot, the ball head on the inserted link is suitable for penetrating through the annular clamping ring after pushing away a plurality of cards, the ball head penetrates through the annular clamping ring and is suitable for pushing the gasket to move towards the inner bottom surface of the slot, and the compression spring is suitable for accumulating elastic potential energy to drive the gasket to move towards the annular clamping ring; the clamping piece can be bent and deformed under the pushing of the ball head, the bent clamping piece is suitable for being abutted against the root of the ball head, and the ball head is suitable for being kept locked under the abutting of the clamping piece and the acting force of the compression spring.
8. The fabricated lining structure for a power tunnel according to claim 1, wherein the grouting mechanism comprises: a grouting duct with a feed inlet arranged on one side of the prefabricated duct piece facing away from the inner wall of the power tunnel, a discharge outlet arranged on one side of the prefabricated duct piece facing to the adjacent prefabricated duct piece, and The two exhaust duct channels are respectively arranged at two sides of the grouting duct channel along the width direction of the prefabricated duct piece, the air inlet of the two exhaust duct channels is arranged at one side of the prefabricated duct piece facing the adjacent prefabricated duct piece, and the air outlet of the two exhaust duct channels is arranged at one side of the prefabricated duct piece facing away from the inner wall of the electric power tunnel; and the waterproof slurry is injected into the grouting pore canal, so that the waterproof slurry can fill gaps between two adjacent prefabricated pipe pieces, and gas and redundant waterproof slurry in the gaps can be discharged through the exhaust pore canal.
9. The fabricated lining structure for a power tunnel according to claim 8, wherein the feed inlet of the grouting duct adopts a tapered structure.
10. Lining construction method, based on the fabricated lining for electric power tunnels according to any of the previous claims 1-9, characterized in that it comprises the following steps: A. Prefabricating a plurality of prefabricated segments meeting the size requirement according to design parameters of the electric power tunnel, and ensuring that one side of each prefabricated segment facing the inner wall of the electric power tunnel is matched with the contour of the inner wall of the electric power tunnel; B. fixedly connecting two adjacent prefabricated duct pieces together through the splicing mechanism between the two prefabricated duct pieces; C. Connecting a plurality of prefabricated duct pieces along the interior Zhou Shouwei of the electric power tunnel, and tightly attaching one side, facing the inner wall of the electric power tunnel, of each prefabricated duct piece to the inner wall of the electric power tunnel to form an annular supporting structure; D. And injecting waterproof slurry into joints of two adjacent prefabricated duct pieces through the grouting mechanism, filling joint gaps, and finishing waterproof sealing treatment of the lining structure.

Description

Assembled lining structure for electric tunnel and construction method of lining structure Technical Field The invention belongs to the technical field of tunnel construction, and particularly relates to an assembled lining structure for an electric power tunnel and a lining structure construction method. Background The tunnel lining structure is a permanent supporting structure which is used for supporting surrounding rock, preventing collapse, resisting groundwater infiltration and providing stable space for the inside in tunnel engineering, and is used as a core barrier of the tunnel, and the performance of the tunnel lining structure is directly related to the safety and the service life of the engineering. In the field of power engineering, a power tunnel is used as a key carrier of an urban underground power grid, a lining structure of the power tunnel needs to meet special requirements of high stability, strong sealing performance and durability, the power tunnel is required to bear complex stratum pressure to maintain structural stability, underground water permeation is effectively blocked to protect cables from being corroded by moisture, chemical corrosion in an underground environment is also required to be resisted to ensure long-term reliable operation, and the power tunnel is an important infrastructure for guaranteeing safety and stability of a power transmission system. The traditional electric power tunnel lining structure adopts a construction process of pouring concrete on site, and the concrete process comprises the steps of firstly, immediately constructing an initial support such as shotcrete, anchor rods, reinforcing steel bars and the like to temporarily stabilize surrounding rock after a tunnel is excavated by a shield or mine method, then, manually or mechanically installing a combined steel template or a wood template on the inner side of the initial support to ensure the clearance of the tunnel, then, binding or welding a reinforcing steel bar skeleton in the template to strengthen the lining structure strength, then, conveying the concrete into the template by a pump truck to vibrate and compact, then, curing for 7 to 14 days under specific temperature and humidity conditions, dismantling the template after the concrete strength reaches the design requirement, and finally, setting a water stop belt, brushing waterproof paint and the like on a circumferential and longitudinal construction joint generated by casting segments to carry out waterproof treatment. On one hand, the construction period is long and the efficiency is low, the procedure connection is complicated, the links from template installation and reinforcement binding to concrete curing depend on a large amount of labor, the influence of factors such as weather, material supply and the like is easy, continuous operation is difficult to realize, the single-ring lining construction period is often long for several days, the whole construction period of a long-distance electric power tunnel is obviously prolonged, the urgent requirement of urban electric network expansion cannot be responded quickly, on the other hand, the waterproof effect is poor and hidden danger is prominent, on site pouring is unavoidable, the uncertainty of manual operation such as water stop installation deviation, concrete vibration and the like is extremely easy to cause weak links of underground water leakage at joints, meanwhile, the proportion of site stirring concrete and slump control difficulty are large, defects such as honeycomb, pitting face and crack are easy to generate if vibration resistance is insufficient or curing is improper, the lining performance is further reduced, and the safety operation of the cable in the electric power tunnel is seriously threatened. Disclosure of Invention The application aims to provide an assembled lining structure for an electric tunnel and a lining structure construction method, which are used for solving the problems of long construction period, low efficiency, poor waterproof effect and prominent leakage hidden trouble in the prior art. In order to achieve the above purpose, the application adopts the following technical scheme: provided is a fabricated lining structure for a power tunnel, including: The prefabricated pipe pieces are connected end to end along the inner periphery of the electric power tunnel, and one side, facing the inner wall of the electric power tunnel, of each prefabricated pipe piece is connected with the inner wall of the electric power tunnel to form an annular supporting structure matched with the inner wall of the electric power tunnel; the splicing mechanisms are respectively corresponding to the prefabricated pipe pieces and are positioned between two adjacent prefabricated pipe pieces, are used for fixing the two adjacent prefabricated pipe pieces, and are used for fixing the prefabricated pipe pieces The grouting devices are respectively corresponding to the prefab