瀝青混凝土路面在長期承受交通荷載及自然環(huán)境的交替作用下，出彩易產(chǎn)生裂縫病害。若不及時干預，雨水滲入將導致路面結構承載力下降，進而引發(fā)坑槽、網(wǎng)裂等嚴重破壞。本指南旨在提供一套科學、系統(tǒng)的裂縫修補技術方案，幫助養(yǎng)護人員“對癥下藥”，延長道路使用壽命。

Asphalt concrete pavement is prone to crack disease under the alternating effects of long-term traffic loads and natural environment. If not intervened in a timely manner, rainwater infiltration will lead to a decrease in the bearing capacity of the road structure, which in turn can cause serious damage such as potholes and mesh cracks. This guide aims to provide a scientific and systematic crack repair technology solution to help maintenance personnel "prescribe the right medicine" and extend the service life of roads.

一、 裂縫病害的科學評估與分類

1、 Scientific evaluation and classification of crack diseases

在制定修補方案前，建議對裂縫的成因、寬度及嚴重程度進行合理評估。瀝青路面裂縫主要分為溫度裂縫、荷載裂縫和基層反射裂縫等。按發(fā)展程度，可劃分為以下幾個階段：

Before formulating a repair plan, it is necessary to conduct a precise assessment of the cause, width, and severity of the cracks. Asphalt pavement cracks are mainly divided into temperature cracks, load cracks, and base reflection cracks. According to the level of development, it can be divided into the following stages:

輕微裂縫（寬度＜5mm）：多為表面溫度應力引起的淺層裂縫，尚未嚴重影響路面結構。

Minor cracks (width<5mm): mostly shallow cracks caused by surface temperature stress, and have not yet seriously affected the pavement structure.

中度裂縫（寬度≥5mm）：裂縫已貫穿面層，水分容易侵入，需進行密封或填充處理。

Moderate crack (width ≥ 5mm): The crack has penetrated the surface layer and moisture is prone to enter, requiring sealing or filling treatment.

重度/網(wǎng)狀裂縫：裂縫縱橫交錯，通常由材料不達標或結構承載力不足引起，伴隨松散、坑槽等結構性破壞。

Severe/network cracks: Cracks crisscross, usually caused by substandard materials or insufficient structural bearing capacity, accompanied by structural damage such as looseness and potholes.

二、 針對性修補技術與工藝選擇

2、 Targeted repair technology and process selection

根據(jù)裂縫的發(fā)展階段與寬度，應采取差異化的處治措施：

Differentiated treatment measures should be taken based on the development stage and width of the cracks:

預防性養(yǎng)護（未裂或初期微裂縫）

Preventive maintenance (uncracked or initial microcracks)

霧封層技術：采用稀釋的乳化瀝青霧化噴灑，封閉細小裂縫并補充老化瀝青。適用于抗滑性良好的路面，成本低（約10元/㎡），但壽命較短（1-3年）。

Mist sealing technology: using diluted emulsified asphalt atomized spraying to seal small cracks and replenish aged asphalt. Suitable for roads with good skid resistance, low cost (about 10 yuan/square meter), but short lifespan (1-3 years).

微表處技術：將改性乳化瀝青、集料等拌和攤鋪成薄層，能有效封水并應對輕度線狀裂縫。造價約15元/㎡，使用壽命可達4-7年，是出彩具性價比的預防手段。

Micro surfacing technology: mixing and spreading modified emulsified asphalt, aggregates, etc. into a thin layer, which can effectively seal water and deal with mild linear cracks. The cost is about 15 yuan/square meter, and the service life can reach 4-7 years, making it a cost-effective preventive measure.

前中期裂縫修補（寬度≥5mm）

Repair of cracks in the early and middle stages (width ≥ 5mm)

貼縫技術（推薦）：采用高分子出彩性聚合物制成的貼縫帶直接粘貼。該工藝無需加熱、流動性強，能深入縫隙，成功率高達95%，養(yǎng)護壽命3年以上，成本約4-5元/米。

Stitching technology (recommended): Directly stick the stitching tape made of high molecular polarity polymer. This process does not require heating, has strong fluidity, can penetrate deep into gaps, has a success rate of up to 95%, has a maintenance life of more than 3 years, and costs about 4-5 yuan/meter.

灌縫與開槽灌縫：對于超過5mm的裂縫，可采用密封膠灌縫；對于6mm以上較寬裂縫，需先用開槽機切出1-1.5cm寬的槽，清理干凈后灌入熱瀝青或改性密封膠。此法密封性好，但受溫度影響較大，成功率約75%-85%。

Grouting and slotting grouting: For cracks exceeding 5mm, sealant can be used for grouting; For cracks wider than 6mm, it is necessary to first use a slotting machine to cut grooves 1-1.5cm wide, clean them thoroughly, and then pour in hot asphalt or modified sealant. This method has good sealing performance, but is greatly affected by temperature, with a success rate of about 75% -85%.

網(wǎng)裂貼技術：針對大面積龜裂或網(wǎng)狀裂縫，清理路面后直接鋪設并壓實網(wǎng)裂貼。該材料抗拉強度大，施工便捷，無需長時間封閉交通，能有效防止雨水下滲。

Mesh cracking sticker technology: For large areas of cracks or mesh cracks, the mesh cracking sticker is directly laid and compacted after cleaning the road surface. This material has high tensile strength, is easy to construct, does not require long-term traffic closure, and can effectively prevent rainwater infiltration.

后期及結構性病害處治

Late stage and structural disease treatment

壓力注漿法：針對大面積結構性裂縫或基層反射裂縫，通過鉆孔向路基深處高壓灌注修補材料，填補深層空隙。

Pressure grouting method: For large-scale structural cracks or base reflection cracks, high-pressure grouting repair materials are injected deep into the roadbed through drilling holes to fill the deep gaps.

罩面或銑刨重鋪：當裂縫發(fā)展到后期，路面結構嚴重受損時，只能采用薄層罩面（加鋪2-3cm熱瀝青混合料）或銑刨后重新攤鋪新面層。此階段處治成本非常高，因此前期預防性養(yǎng)護至關重要。

Covering or milling and re paving: When cracks develop to a later stage and the road structure is severely damaged, only a thin covering (adding 2-3cm hot asphalt mixture) or milling and re paving a new surface layer can be used. This stage has the highest treatment cost, so preventive maintenance in the early stage is crucial.

三、 施工注意事項與質(zhì)量控制

3、 Construction precautions and quality control

清潔與干燥：無論采用何種修補工藝，施工前建議使用空壓機或吹風機有效清理縫內(nèi)雜物、灰塵，并保持裂縫區(qū)域絕對干燥，這是確保粘結強度的先決條件。

Cleaning and drying: Regardless of the repair process used, it is necessary to thoroughly clean the debris and dust inside the cracks with an air compressor or blower before construction, and keep the crack area absolutely dry. This is a prerequisite for ensuring the bonding strength.

溫度控制：灌縫施工需嚴格控制材料加熱溫度（通常在160-190℃）；微表處及薄層罩面施工時，環(huán)境溫度宜在10℃以上，且需嚴格把控瀝青混合料的出廠與攤鋪溫度。

Temperature control: Strict control of material heating temperature (usually between 160-190 ℃) is required for joint filling construction; During the construction of micro surface and thin layer overlay, the ambient temperature should be above 10 ℃, and the factory and paving temperature of asphalt mixture should be strictly controlled.

開放交通時機：貼縫、網(wǎng)裂貼等冷施工材料在壓實后即可開放交通；而灌縫及熱拌瀝青罩面施工后，建議等待材料充分冷卻（如路面溫度低于50℃）方可放行，避免車輛輪胎帶走修補材料。

Opportunity for traffic opening: Cold construction materials such as adhesive joints and mesh cracks can be opened to traffic after compaction; After the grouting and hot mix asphalt overlay construction, it is necessary to wait for the materials to cool sufficiently (such as when the road surface temperature is below 50 ℃) before releasing, to avoid the vehicle tires taking away the repair materials.