CN-121992819-A - Assembled integral type earthquake-resistant reinforcing structure system of underground box structure and construction method

CN121992819ACN 121992819 ACN121992819 ACN 121992819ACN-121992819-A

Abstract

The invention discloses an assembled integral type anti-seismic reinforcement structure system of an underground box structure and a construction method, which belong to the technical field of constructional engineering, are arranged on the inner side of a wallboard of the existing underground box structure (a pipeline well, a pool body, a cavity and the like), and are composed of assembled prefabricated modules and seam modules for forming an integral structure surrounded by four sides, wherein the prefabricated modules are designed in a lightweight mode, the seam modules are used for connecting adjacent prefabricated modules, the connection structure of the seam modules is provided with a characteristic of being implemented in stages, the seam modules comprise steel structures serving as permanent face connection members, and post-cast concrete poured in a steel structure enclosing cavity in the subsequent stage, the steel structures provide temporary connection, fixing and dimension compensation functions in the initial installation stage, and serve as post-cast special concrete templates in the later stage of transformation, and finally are combined with concrete to form a reinforced concrete composite structure node. The structure system can effectively solve the outstanding problems of long construction period, poor specification adaptability, insufficient shock resistance and the like in the conventional transformation of the underground box structure, and realizes quick, economic and high-reliability shock resistance reinforcement in the conventional shutdown maintenance period.

Inventors

HUANG LEI
LIU ZHONGXIAN
Duan Gengyue
ZHANG HAI
SHI QINGCHUN
Huang Zhenen
GUO SHAOLONG
LIU XIAOKE
JIANG HAODONG

Assignees

天津城建大学

Dates

Publication Date: 20260508
Application Date: 20251230

Claims (13)

1. The utility model provides an assembled integral antidetonation reinforced structure system of underground box structure, its characterized in that, the structure system set up in the wallboard inboard of underground box structure comprises prefabricated module of assembled reinforced concrete and piece module for form the integrated structure that the four sides enclose, wherein: the joint module is used for connecting adjacent prefabricated modules, and the connection structure of the joint module has the characteristic of being implemented in stages; The joint module comprises a steel structure serving as a permanent bonding member and post-cast concrete poured in a cavity enclosed by the steel structure at a later stage; the steel structure provides temporary connection, fixing and size compensation functions at the initial installation stage, and forms a steel-concrete composite structure node together with the post-cast concrete in the final structure.
2. The assembled monolithic earthquake-resistant reinforcement structure system of claim 1, wherein the ends of the prefabricated modules are provided with end formations comprising: Double-side embedded steel plates are arranged along the vertical edges in a through length mode; A horizontal overhanging steel bar extending outwards; the interface treatment measures for enhancing the binding and biting actions of the new concrete and the old concrete comprise roughening treatment, presetting key grooves or precoating interface agents.
3. The assembled monolithic earthquake-resistant reinforcing structure system of claim 1 or 2, wherein the prefabricated modules are of variable thickness design with unchanged edge structure dimensions but reinforced construction, with optimized reduction of intermediate structure thickness dimensions.
4. A fabricated monolithic earthquake-resistant reinforcing structure system as claimed in claim 3, wherein the thinned location of the intermediate structure is in the form of an inner flat-out recess or an outer flat-in recess side depending on engineering requirements.
5. The assembled monolithic earthquake-resistant reinforcing structure system of claim 1, wherein the joint modules are disposed at corner locations of the wall panels of the underground box structure and wherein the composite reinforcing nodes are constructed.
6. The assembled monolithic earthquake-resistant reinforcement structure system of claim 1, wherein the steel structure in the splice module comprises: The L-shaped mounting steel plate is used for being fixedly connected with the pre-buried steel plate of the prefabricated module in a welding way; The steel supports are arranged on the inner side surfaces of the mounting steel plates in two directions, are preferably steel supports of the profile steel members and are used for improving rigidity of the joint module in the early stage and integrity of the joint module in the later stage, and reserved holes for welding are formed in the mounting steel plates.
7. The assembled monolithic earthquake-resistant reinforcing structure system of claim 1, wherein the post-cast concrete is special concrete having self-compaction, micro-expansibility and underwater casting properties.
8. The method for constructing the assembled integral type anti-seismic reinforcement of the underground box structure is characterized by comprising the following steps of: one-step molding: a. hoisting and positioning the prefabricated module; b. installing the steel structure, and utilizing the steel structure to realize compensation adjustment of the size of the underground box structure, and connecting the horizontal overhanging steel bars of the adjacent prefabricated members; c. connecting the steel structure with adjacent prefabricated modules by adopting dry connection to form a temporary structure meeting the normal use condition requirements; node reinforcement stage: a. The steel structure is taken as a template and is enclosed with the end part of the prefabricated module to form a closed cavity; b. Pouring post-pouring special concrete in the cavity to form a steel-concrete composite structure; c. The steel-concrete composite structure is used as a permanent structure to participate in bearing, and meets the safety requirement under the special working condition of earthquake.
9. The construction method according to claim 8, wherein the dry connection in the one-time forming stage is performed by welding or by bolting, plugging or flange.
10. The construction method according to claim 9, wherein the welding process comprises the steps of providing a long weld at the intersection of the edge of the installed steel sheet and the pre-buried steel sheet, and providing a reinforcing weld at the reserved hole of the outside installed steel sheet to improve the welding arrangement and increase the total length of the weld.
11. The method according to claim 8, wherein the one-shot forming step is performed after the prefabricated module is lifted in place, to connect the horizontally overhanging bars corresponding to the adjacent prefabricated members.
12. The method according to claim 8, wherein the node reinforcement is preferably performed continuously after the completion of the one-shot forming process, and the node reinforcement is performed under the condition of water in the operation period if the object to be modified is a water-carrying operation structure with a limited construction period.
13. The construction method according to claim 8, wherein the node reinforcing stage is implemented by pouring special concrete, and curing of the special concrete is performed in parallel with water-carrying operation of the structure.

Description

Assembled integral type earthquake-resistant reinforcing structure system of underground box structure and construction method Technical Field The invention belongs to the technical field of constructional engineering, and particularly relates to an assembled integral type anti-seismic reinforcing structure system of an underground box structure and a construction method. Background Existing underground box structures, such as various pipeline rectangular wells, small-sized water pools, partial underground facilities and the like, are built by adopting masonry structures, plain concrete sheets or plastics and other materials in early stage. With the development of engineering technology, the structural forms are gradually reduced, but a large number of old box-shaped structures are still continuously used due to huge stock and limited transformation conditions. The structure has lower design standard at the time, partial structure does not meet the current standard requirement, and the problems of structural performance degradation and the like commonly occur in the long-term service process, thus forming potential engineering hidden trouble. Particularly for critical structures such as piping wells involving urban lifeline systems, performance degradation may pose a systematic safety risk. The underground box-shaped structure, in particular to a long-term buried structure such as a brickwork well, a plastic pool, a plain concrete thin-wall cavity and the like with smaller body size, and the phenomena such as structural deformation, local damage, material performance aging and the like are common. For the structure of the disease operation, a newly built treatment mode after the whole disassembly is adopted preferentially. However, in actual engineering, due to factors such as engineering cost, operation characteristics or technical feasibility, large-scale new construction is often difficult to implement, so that structural reinforcement and transformation become a main engineering coping strategy. The reinforcement method commonly used at present mainly comprises a cast-in-situ method and a precast method, and can respectively realize integral or local reinforcement. The cast-in-situ method is generally of a reinforced concrete structure, the construction operation surface is limited, the wet operation period is long, the reconstruction period is limited, the precast method is mostly of a steel structure, although the installation is more convenient, the precast method is easily corroded by an underground humid environment, the whole cost is higher, and the precast method has no applicability. Especially for structures such as underground small-sized water tanks, pipeline wells and the like, the internal operation space is narrow, short-time shutdown transformation is needed to be carried out under the water carrying condition of maintaining operation, the time window for allowing construction is extremely limited, and the implementation difficulty of the conventional reinforcement technology is further increased. In summary, the underground box structure (especially small and medium-sized structures) is generally reinforced and reformed by adopting a cast-in-situ method, and the reforming scheme is often focused on integral reinforcement, so that precise reinforcement and structural optimization cannot be realized, and meanwhile, a plurality of limitations are faced in aspects of cost, space, construction period, working condition and the like. Therefore, under the current engineering technical conditions, the reinforcement of the existing underground box structure still needs to be tightly combined with the structural characteristics and the use requirements, and the outstanding problems of long reconstruction construction period, insufficient structural reinforcement pertinence, poor specification adaptability during large-scale reconstruction and the like are mainly solved. Disclosure of Invention Aiming at the problems of long reconstruction construction period, insufficient structural reinforcement pertinence, poor specification adaptability in large-scale reconstruction and the like of an underground box structure in the prior art, the invention provides an assembled integral type anti-seismic reinforcement structure system of the underground box structure and a construction method. The invention discloses an assembled integral type anti-seismic reinforcement structure system of an underground box structure, which is characterized in that the structure system is arranged on the inner side of a wallboard of the box structure and consists of an assembled reinforced concrete prefabricated module and a seam module, wherein the seam module is used for connecting adjacent prefabricated modules, the connecting structure of the seam module is provided with a characteristic of being implemented in stages, the seam module comprises a steel structure serving as a permanent bonding member, and post-cast specia