CN-121997578-A - Assembling and construction process of steel sleeve for structural reinforcement

Abstract

The invention provides an assembling and construction process of a steel sleeve for structural reinforcement, which belongs to the technical field of assembling and construction and comprises the following steps of 1, carrying out modularized split design on the steel sleeve for structural reinforcement, 2, carrying out preassembled sealing system design on the steel sleeve for structural reinforcement after modularized split design, 3, carrying out annular space and grouting parameter standardization after the preassembled sealing system design, and 4, carrying out construction process optimization after the annular space and grouting parameter standardization. The invention can improve the reinforcement construction efficiency, reduce the operation risk and ensure the stable and controllable reinforcement quality.

Inventors

• REN MIN
• YANG LEI
• CHEN XILING
• MIAO YANSUI
• ZHANG WENYUAN
• YANG LIWEN
• ZHANG ZHIYU
• XIA JUNQIAO
• MO YASI
• GU SHENGWEI

Assignees

• 中交第三航务工程局有限公司

Dates

Publication Date

20260508

Application Date

20260115

Claims (10)

1. 1. The utility model provides a steel sleeve's assembly and construction technology for structural reinforcement which characterized in that includes: Step 1, carrying out modularized split design on a steel sleeve for structural reinforcement; Step 2, after the modularized split design, the pre-assembled sealing system design is carried out on the steel sleeve for structural reinforcement; Step 3, after the pre-installed sealing system is designed, the standardization of the annular space and grouting parameters is carried out; And 4, carrying out construction process optimization after the standardization of the annular space and grouting parameters.
2. 2. The process for assembling and constructing a steel sleeve for structural reinforcement according to claim 1, wherein in step 1, the steel sleeve for structural reinforcement as an external reinforcing steel structure is split into 2 semicircular steel anchors and 2 semicircular steel sleeves; in the step 1, a semicircular steel hoop is used for being fixed on the upper part of a member to be reinforced, and is connected through a bolt in a penetrating way so as to realize preliminary positioning; the semicircular steel sleeve is used as a main body structure and is spliced with the upper steel hoop into a whole through the kidney hole.
3. 3. The process for assembling and constructing a steel sleeve for structural reinforcement according to claim 2, wherein step 2 specifically comprises: the sealing strip ring is embedded into a reserved groove of the annular steel plate and the annular angle steel in advance at the upper end and the bottom of the semicircular steel sleeve to form an integrated sealing assembly; the sealing strip clamping groove is preset at the bolt connection part of the splicing part of the semicircular steel sleeve, and the high-pressure-resistant sealing strip is synchronously stuck during factory prefabrication.
4. 4. The process for assembling and constructing the steel sleeve for structural reinforcement according to claim 3, wherein in the step 2, the annular steel plate and the annular angle steel are arranged in an annular mode of inner and outer matching, namely, are fixed along the edge areas of the top port and the bottom port of the semicircular steel sleeve, so as to form a closed annular structure.
5. 5. The process for assembling and constructing a steel sleeve for structural reinforcement according to claim 4, wherein step 3 comprises: The size of the annular space is standardized, namely the size of the annular space is designed to be 6-10cm based on the flowing performance of grouting materials and the stress requirements of members, and the size of the annular space is adjusted to be 19cm according to the design requirements aiming at large-load members of pile legs and jackets of offshore wind farms.
6. 6. The process for assembling and constructing a steel sleeve for structural reinforcement according to claim 5, wherein step 3 specifically further comprises: The grouting pressure control standardization as a grouting parameter is to calculate the base pressure P according to the grouting height h and the grouting material density rho and the formula P=hrho, and the actual construction is taken to be 4-7MPa.
7. 7. The process for assembling and constructing a steel sleeve for structural reinforcement according to claim 6, wherein step 4 specifically comprises: the procedures of modular assembly, preassembly sealing, integral fastening and grouting reinforcement are sequentially executed.
8. 8. The process for assembling and constructing a steel sleeve for structural reinforcement according to claim 7, wherein step 4 specifically further comprises: the grouting pump is connected with a grouting opening at the bottom of the steel sleeve, and a lubricating pipe material is adopted to lubricate the grouting pump and a hose; the slurry is stirred according to the mixing ratio of the grouting materials, and the stirring time is 3-5 minutes.
9. 9. The process for assembling and constructing a steel sleeve for structural reinforcement according to claim 8, wherein step 4 specifically further comprises: starting a grouting pump, controlling the initial pressure to be 2-3MPa by adopting a bottom-up grouting mode, gradually increasing the pressure to 4-7MPa when the slurry flows out from a top slurry overflow port, and keeping the pressure screen slurry for 10 minutes; And (3) observing the change of the pressure gauge in the pulp screening process, if the pressure suddenly drops, checking whether the pulp leaks or not, and after the faults are removed, recharging to a pulp overflow port to discharge the pulp again.
10. 10. The process for assembling and constructing a steel sleeve for structural reinforcement according to claim 9, wherein step 4 specifically further comprises: After grouting, covering a heat-insulating and moisture-preserving layer on the outer side of the steel sleeve, naturally curing for 3 days when the environmental temperature is more than or equal to 5 ℃, and curing by adopting electric heating when the temperature is less than 5 ℃, so as to ensure the early strength development of grouting materials; after curing, the grouting compactness of the annular space is detected by adopting ultrasonic waves, meanwhile, a curing test block under the same condition is manufactured, and the compressive strength is detected for 28 days.

Description

Assembling and construction process of steel sleeve for structural reinforcement Technical Field The invention belongs to the technical field of assembly and construction, and particularly relates to an assembly and construction process of a steel sleeve for structural reinforcement. Background In the long-term service process of large-scale components (such as pile legs of offshore wind power plants, pile foundations of wharfs, hydraulic structural columns and the like), the large-scale components are influenced by factors such as severe environments (seawater corrosion, tidal scouring, temperature change), load accumulation, material aging and the like, diseases such as concrete corrosion and falling, crack expansion, structural bearing capacity reduction and the like are easy to occur, and engineering structural safety is seriously threatened, and the service life is seriously threatened. The conventional reinforcement technology has a plurality of limitations: The integral steel sleeve has overlarge dead weight, large hoisting equipment is required to be matched and installed, equipment approach is difficult in complex operation scenes such as narrow spaces (such as wharf pile foundation groups and the interiors of jackets) or offshore wind farms, and the like, the installation efficiency is low and the safety risk is high; The on-site formwork supporting pouring process is complicated in procedure, needs to go through the procedures of formwork supporting, vibrating, curing, formwork removing and the like, has long construction period, is greatly influenced by environmental temperature and humidity, and is easy to cause the problems of non-compaction grouting, slurry leakage and the like; The existing sealing structures of assembled steel sleeves, such as the technical proposal of patent publication No. CN222008890U, are mostly formed by temporarily pasting sealing strips on site, have poor sealing reliability, and are easy to cause overlarge pressure explosion slurry or slurry loss in the grouting process due to uneven bolt fastening or insufficient sealing strip laminating degree, so that the reinforcing quality is influenced; The size design of the annular space and the grouting pressure control lack of unified standards, and partial engineering has insufficient fluidity of grouting materials due to too small space, or secondary damage of a structure is caused by improper pressure value, so that the reinforcing effect and the construction safety are difficult to be considered. Disclosure of Invention In order to solve the defects in the prior art, the invention provides an assembling and construction process of a steel sleeve for structural reinforcement, which is a modular assembling, reliable in sealing and suitable for the assembling and construction process of the steel sleeve for structural reinforcement of complex scenes, and aims to improve the reinforcing construction efficiency, reduce the operation risk and ensure stable and controllable reinforcing quality. The invention adopts the following technical scheme. A steel sleeve assembly and construction process for structural reinforcement comprises the following steps: Step 1, carrying out modularized split design on a steel sleeve for structural reinforcement; Step 2, after the modularized split design, the pre-assembled sealing system design is carried out on the steel sleeve for structural reinforcement; Step 3, after the pre-installed sealing system is designed, the standardization of the annular space and grouting parameters is carried out; And 4, carrying out construction process optimization after the standardization of the annular space and grouting parameters. Further, in step 1, the steel sleeve for structural reinforcement as an external reinforcing steel structure is split into 2 semicircular steel anchors and 2 semicircular steel sleeves. Further, in the step 1, a semicircular steel hoop is used for being fixed on the upper part of a member to be reinforced, and preliminary positioning is achieved through penetrating connection of bolts; the semicircular steel sleeve is used as a main body structure and is spliced with the upper steel hoop into a whole through the kidney hole. Further, step 2 specifically includes: the sealing strip ring is embedded into a reserved groove of the annular steel plate and the annular angle steel in advance at the upper end and the bottom of the semicircular steel sleeve to form an integrated sealing assembly; the sealing strip clamping groove is preset at the bolt connection part of the splicing part of the semicircular steel sleeve, and the high-pressure-resistant sealing strip is synchronously stuck during factory prefabrication. Further, in step 2, the annular steel plate and the annular angle steel are arranged in an annular mode in which the annular steel plate and the annular angle steel are matched with each other, namely, the annular steel plate and the annular angle steel are fixed along t