9results about How to "Mature construction technology" patented technology

A durable composite anticorrosive coating for a concrete structure of a road in a cold region belongs to the technical field of building materials, and adopts the specific scheme that the composite anticorrosive coating comprises an inner coating and an outer coating, the inner coating is coated on a concrete base surface, the outer coating is coated on the inner coating, and the outer coating is coated on the outer coating. The inner coating is a single-component epoxy resin interface bonding layer, and the outer coating is a single-component MMA resin sand-containing anti-corrosion layer. Through the composite structure design of the epoxy resin interface bonding layer and the MMA resin sand-containing anti-corrosion layer, the advantages of high permeability and strong bonding characteristics of epoxy resin and the advantages of rapid curing, high wear resistance, wide temperature range (still keeping toughness at-40 DEG C) and good weather resistance of MMA resin are fully played, and the efficient and lasting protection effect is achieved.

The invention discloses a grouting reinforcement method for a karst area. The grouting reinforcement method comprises the following steps that S1, karst detection is conducted; in combination with early-stage geological data, an elastic wave CT (Computed Tomography) method and a borehole television imaging method are used for carrying out geological supplementary investigation, and the position distribution, the range size, the filling condition and the water-endowed state of the karst cave are determined; s2, defining a processing range; according to a detection result and engineering geological conditions, defining a karst treatment range; s3, grouting reinforcement construction is conducted, specifically, reinforcement is conducted by combining a filling method and a grouting method according to the geological conditions of the tunnel body engineering, the surrounding environment and the construction technology; s4, quality acceptance: arranging inspection holes according to 5-10% of the total grouting holes, and completing grouting reinforcement construction after all the grouting holes meet the end standard and the inspection holes meet the design requirements; the karst area grouting reinforcement method can be suitable for grouting reinforcement of multiple types of karst areas, slurry is evenly diffused during reinforcement, and the bearing capacity and stability of a foundation are improved.

The invention discloses a natural landscape revetment and a construction method thereof, and belongs to the technical field of landscape engineering, and the main body structure of the revetment sequentially comprises a rammed earth layer, a soil layer layered rolling layer and a sandy soil layer from bottom to top; 3-5 pieces of decoration scene stone are arranged in an upstream proper area every 12-15 m; a 2.5-3.5 m aquatic plant planting area is arranged in the midstream; the method comprises the following steps: arranging a wood pile at the downstream, arranging sandy soil, a wood bundle and the wood pile at the upstream area of the wood pile, adopting wickers of 1-5cm and 40-50cm in length as the wood bundle, nailing the wood pile into the soil by 1.5 m according to the distance of 1m, scion, and binding the wood bundle and the wood pile. According to the revetment, natural elements and ecological functions are combined, the construction method is simple and feasible, the stability of the revetment can be effectively enhanced, meanwhile, the attractive and natural landscape effect is created, and good ecological benefits and landscape value are achieved.

This utility model discloses a highly permeable retaining wall structure for road cuts. The structure includes a wall body segmented with settlement joints, an internal drainage system, and a multi-stage reverse filtration drainage system along the entire height of the wall back. The multi-stage reverse filtration drainage system, from the wall body towards the backfill soil, consists of a permeable geotextile isolation layer, a first-stage coarse gravel reverse filtration layer, a second-stage medium gravel reverse filtration layer, and a third-stage fine gravel reverse filtration layer. Geogrids are installed between each reverse filtration layer, and a permeable geotextile isolation layer is also installed between the third-stage fine gravel reverse filtration layer and the backfill soil. The drainage system includes multiple rows of drainage pipes extending into the first-stage coarse gravel reverse filtration layer, each with permeable geotextile filter sleeves at its inlet ends. This utility model, through the combination of multi-layer reverse filtration and three-dimensional drainage, forms a highly efficient and clogging-resistant drainage channel, rapidly draining water accumulated behind the wall, greatly reducing hydrostatic pressure, and significantly improving the long-term stability and safety of the retaining wall.

The invention discloses early-strength high-impermeability low-resilience shotcrete and a construction method thereof, and relates to the technical field of shotcrete. The sprayed concrete is prepared from the following raw materials in parts by mass: 300 to 400 parts of cement, 800 to 850 parts of coarse aggregate, 750 to 850 parts of fine aggregate, 30 to 50 parts of an early strength component, 20 to 30 parts of an alkali-free liquid accelerator, 20 to 30 parts of a micro-expansion component, 10 to 20 parts of a compact component, 5 to 10 parts of a thixotropic component, 5 to 10 parts of a humidity control component, 4 to 8 parts of a water reducing agent and 150 to 160 parts of water. The sprayed concrete provided by the invention is good in workability, excellent in water retention effect and small in slump loss, and can meet the requirements of high-temperature seasons and long-distance transportation; the early strength is high, the 6-hour compressive strength is larger than or equal to 3 MPa, the 24-hour compressive strength is larger than or equal to 10 MPa, and the compressive strength is higher than The rebound amount in the construction process is low (less than or equal to 6%), and the problems of waste of a large amount of building materials, cost increase, environment pollution, construction difficulty and the like are solved; after construction, the internal compactness of the structure is high, the anti-cracking effect is good, and the problem of water leakage is solved.

This invention relates to the field of slope ecological restoration technology, and discloses a rapid revegetation technology for steep slopes in western Sichuan and its application. This technology uses an oxidized polyacrylamide (PAM) vegetation substrate to construct a layered composite vegetation structure. Through graded spraying, a bottom erosion-resistant layer and a surface ecological growth layer are formed, achieving stable adhesion and rapid consolidation of the vegetation substrate on steep slopes. The modified polyacrylamide has an oxidation degree of 1.0%–5.0% and an addition amount of 0.1%–0.4%, which significantly improves the water retention, compressive strength, freeze-thaw resistance, and erosion stability of the vegetation substrate, and effectively promotes rapid plant establishment and growth. The method includes slope pretreatment, layered spraying, and maintenance management, and is suitable for ecological restoration projects on steep rocky slopes in western Sichuan with slopes of 30°–60° and altitudes of 1000–3500 m. It features high construction efficiency, rapid ecological restoration, and good long-term stability.

This utility model relates to the field of road engineering technology and discloses a frost heave and differential settlement control structure suitable for culvert sections in cold regions. The structure, from top to bottom, includes a roadbed, a fill matrix, a stepped aggregate layer, a stepped high-strength foamed concrete layer, and a culvert. A main drainage pipe is inclinedly arranged in the aggregate layer, and lateral drainage pipes are provided on both sides of the roadbed slopes to drain moisture from the roadbed. The high-strength foamed concrete layer is laid above and on both sides of the culvert, providing good thermal insulation to address freezing issues exacerbated by wind tunnel effects, and buffering the frost heave force of the surrounding soil to prevent direct frost heave force from causing compression damage to the culvert structure. This structure forms a multi-level stiffness transition from flexible to semi-rigid along the culvert transition section of the roadbed, reducing differential settlement and misalignment risks at the connection between the culvert and the roadbed, improving the overall stability of the roadbed and driving safety. The overall structure is reliable, easy to construct, and suitable for widespread application in cold regions.

This invention discloses a solubilization and multiphase extraction remediation system and method for low-permeability organic-contaminated soil, relating to the field of soil remediation. The remediation system includes a solubilization reagent tank, a metering pump, an injection well, a drainage board, a horizontal well, a self-priming pump, and a tailings collection device. The remediation method involves injecting the solubilization reagent into the upper part of the low-permeability contaminated area using the metering pump. A horizontal well is constructed in the lower part of the contaminated area. A drainage board is installed through the low-permeability contaminated area, with its end hydraulically connected to the horizontal well. The extraction negative pressure generated by the self-priming pump drives the solubilization reagent through the drainage board, leaching the low-permeability soil layer before entering the horizontal well and finally entering the tailings collection device for purification. This invention utilizes the drainage board to improve the permeability of organic-contaminated soil and couples solubilization leaching with multiphase extraction technology, overcoming the bottleneck problem of difficult removal of organic pollutants in low-permeability soil layers. The operation process is simple, significantly shortening the remediation time, and has broad engineering application prospects.

The utility model discloses an expressway reconstruction and expansion soft foundation road section anti-settlement structure which comprises a longitudinal connecting batten, a transverse supporting batten, a longitudinal connecting batten, a transverse supporting batten, a longitudinal connecting batten and a transverse supporting batten, wherein the transverse supporting batten is welded below the longitudinal connecting batten; a splicing mechanism for connecting firmness is arranged above the longitudinal connecting battens; and an anti-sedimentation improving mechanism for enhancing the supporting strength is arranged above the transverse supporting plate strip. According to the anti-sedimentation structure for the reconstruction and expansion soft foundation road section of the expressway, the longitudinal connecting battens can be effectively spliced and lengthened by arranging the splicing mechanism, so that the connecting area of the longitudinal connecting battens and the hard subbase side can be enlarged, the connecting firmness can be greatly enhanced, meanwhile, the anti-sedimentation mechanism is arranged, and the anti-sedimentation effect is improved. By arranging the supporting bracket, the firmness of concrete pouring in the supporting bracket can be greatly enhanced, so that the supporting area and strength of a soft soil foundation can be increased, in addition, a stabilizing mechanism is arranged, the connecting stability of the longitudinal connecting battens and the hard subbase side can be enhanced, and the connecting firmness of the longitudinal connecting battens and the hard subbase side can be further enhanced.