Unstable project sources: Without stable long-term business channels, companies mostly rely on scattered bidding and customer referrals. Business volume fluctuates drastically, making long-term capacity planning impossible.

Cutthroat low-bidding competition: Many projects adopt the lowest bid winning rule. Rivals deliberately undercut prices, forcing reinforcement enterprises to narrow profit margins drastically. Some even compromise material quality and construction procedures to cut costs, such as reducing carbon fiber cloth layers or using inferior adhesives.

Advance project risks: Some owners conceal original building defects including foundation settlement and hidden structural damage, which only come to light after winning the bid. Actual construction difficulty far exceeds expectations. Without clear risk allocation clauses in contracts, contractors fall into a dilemma: proceeding with construction leads to losses, while abandoning the project results in breach-of-contract liabilities.

Lack of original building documents requires extra manpower and resources for supplementary on-site testing, raising costs and delaying construction schedules.

Poor adaptability of reinforcement schemes: Designed solutions often fail to fit actual site conditions, leading to scheme rework and material waste.

Conflicts between codes and actual building conditions: Some projects must comply with latest technical standards, while the original structural parameters of old buildings fail to meet new code indexes. Repeated trade-offs between compliance and economy prolong the scheme approval cycle.

Space and environmental constraints: Construction proceeds without suspending the owner’s daily operation, with narrow working areas that block large machinery like hoisting equipment from entry. Works have to rely purely on manual labor, resulting in low construction efficiency.

Risks of damaging existing structures: Construction must protect original building components. However, complicated site conditions (e.g., rebar positions inconsistent with drawings) may trigger structural safety hazards from minor operational errors, forcing work stoppages for rectification.

Uncontrollable construction schedules: Schedule delays are easily triggered by owner design changes, adverse weather and delayed material delivery. Most reinforcement projects are urgent in nature, and any delay may expose contractors to compensation claims from clients.

Uneven material quality: The market is flooded with cheap substandard materials such as counterfeit carbon fiber cloth and unqualified adhesives. Loose procurement control will lead to substandard structural performance after reinforcement, failed acceptance and mandatory rework.

Unstable material supply: Special reinforcement materials (high-temperature resistant, moisture-proof structural adhesives, etc.) have limited suppliers and long production cycles. Insufficient advance stock will cause work suspension due to material shortage.

Volatile material costs: Reinforcement materials are mostly made from chemical raw materials like resin, whose prices fluctuate frequently with market trends. Most contracts adopt fixed total price terms, so raw material price hikes directly erode corporate profit margins.

High risk of cost overruns: Omitted defects in preliminary surveys (e.g., undiscovered corroded components requiring extra treatment), on-site rework and surging material prices all push actual costs above budget. Low-bid projects barely have profit buffers, putting companies at risk of losses.

Prolonged payment collection cycles: Owners settle payments by construction milestones, yet acceptance can be delayed by excessive client demands or time-consuming third-party testing, making final payment hard to recover. Government and state-owned enterprise projects involve cumbersome approval procedures, with payment waiting periods stretching for months and severely straining corporate cash flow.

Difficult control over concealed works: Many reinforcement procedures such as post-installed rebar grouting belong to concealed construction items. Substandard workmanship including insufficient rebar embedment depth and incomplete grouting can hardly be detected during construction. Once defects are identified in acceptance inspections, destructive rework like chiseling structural components is required, incurring substantial costs.

Divergent interpretations of acceptance standards: Owners, supervisors and third-party testing institutes may hold different understandings of relevant codes. Without clarified acceptance criteria in advance, disputes frequently arise where contractors deem the works qualified while acceptance authorities reject them, bringing project progress to a halt.

Retrospective quality liability risks: Reinforcement projects come with long warranty periods. If structural hazards emerge later due to defective materials or construction flaws, contractors are obligated to conduct repairs and may even face legal proceedings.

Distorted demand communication: The owner’s practical requirements fail to be accurately conveyed to designers, or designers fail to deliver clear technical disclosure to construction teams, resulting in inconsistent construction against actual demands and mandatory rework.

Unclear rights and liabilities among multiple parties: Contracts without clear division of responsibilities (e.g., work boundary between general contractors and reinforcement subcontractors, the owner’s obligation to provide qualified site conditions) will trigger mutual buck-passing and schedule delays.

Fluctuating regulatory requirements: Government authorities (fire protection, environmental protection, etc.) may update supervision standards mid-construction, such as newly added dust monitoring rules. Temporary adjustments to construction plans raise extra costs and prolong project duration.