CN-121973324-A - Curing blanket for concrete raft and laying method

CN121973324ACN 121973324 ACN121973324 ACN 121973324ACN-121973324-A

Abstract

The invention provides a maintenance blanket for concrete rafts and a layout method, and belongs to the technical field of building construction. The technical scheme includes that the water injection blanket comprises a plurality of water injection blankets and functional blankets which are arranged on a concrete raft, wherein the water injection blankets and the functional blankets comprise wicking geotextiles and heat preservation layers, the heat preservation layers are arranged on the upper sides of the wicking geotextiles, the water injection blanket further comprises water injection pipes and water storage layers, the water storage layers are arranged between the wicking geotextiles and the heat preservation layers, the water injection pipes are provided with a plurality of groups, and the lower ends of the water injection pipes penetrate through the heat preservation layers and then extend into the water storage layers. The method has the beneficial effects that the active migration effect of moisture from the water injection port, the water storage layer, the wicking geotextile and the maintenance area can be realized, the large water flood irrigation and moisturizing mode in the existing maintenance mode is effectively improved, meanwhile, the hydration heat release phenomenon of concrete and the water guide characteristic of the wicking geotextile are combined efficiently, the effective utilization of hydration heat and the remarkable improvement of the water guide rate are realized, and the targeted transmission of limited water resources to the key area is ensured.

Inventors

ZHANG SHUO
WANG QIANG
MENG FANCHENG
Yang Chaofa
ZHANG ZHENGXIAO
WANG MINMIN
Hu jiangnan
LIU LIANGLIANG
YAN GANG
Qi shuang
MA PENGHUI

Assignees

中建八局第一建设有限公司

Dates

Publication Date: 20260505
Application Date: 20260305

Claims (10)

1. The maintenance blanket for the concrete raft is characterized by comprising a plurality of water injection blankets (2) and functional blankets (4) which are arranged on the concrete raft; The water injection blanket (2) and the functional blanket (4) comprise a wicking geotextile (12) and an insulating layer (9), wherein the wicking geotextile (12) is abutted to the concrete raft, and the insulating layer (9) is arranged on the upper side of the wicking geotextile (12); The water injection blanket (2) further comprises a water injection pipe (1) and a water storage layer (11), wherein the water storage layer (11) is arranged between the wicking geotechnical cloth (12) and the heat preservation layer (9), and the water injection pipe (1) is provided with a plurality of groups, and the lower end of the water injection pipe penetrates through the heat preservation layer (9) and then stretches into the water storage layer (11).
2. The curing blanket for concrete raft according to claim 1, wherein an interlayer fixing device (13) is arranged on the periphery of the water injection pipe (1), the interlayer fixing device (13) comprises an annular plate (14) matched with the periphery of the water injection pipe (1), the water injection pipe (1) penetrates into the annular plate (14), a plurality of groups of extension rods (15) are uniformly arranged on the periphery of the annular plate (14) along the circumference, supporting legs (16) are vertically arranged at the free ends of the extension rods (15), the upper sides of the supporting legs (16) penetrate into the heat insulation layer (9), and the lower sides of the supporting legs (16) penetrate into the water storage layer (11).
3. The maintenance blanket for concrete rafts according to claim 1, wherein the wicking geotextile 12 has water guiding yarns inside.
4. The maintenance blanket for concrete rafts according to claim 1, wherein the distance between two adjacent water injection pipes (1) is 1m-2m, and a gauze (8) is arranged at the lower end of each water injection pipe (1); The water injection pipe (1) is a PVC pipe with the inner diameter not smaller than 50 mm.
5. The maintenance blanket for concrete rafts according to claim 1, wherein the edges of the water injection blanket (2) and the functional blanket (4) are provided with fixing braiding wires (7) for fixing and shaping; The thickness of the water storage layer (11) is not less than 10cm; the filler of the water storage layer (11) is sawdust, straw mat or non-woven fabric.
6. The maintenance blanket for concrete rafts according to claim 1, wherein the insulation layer (9) is made of glass fiber cotton, and the thickness of the insulation layer (9) is not less than 5cm.
7. The maintenance blanket for concrete rafts according to claim 1, wherein both sides of the wicking geotextile (12) in the width direction leave a lap joint section (6) for lap joint extending out of the water injection blanket (2) or the functional blanket (4), and the width of the lap joint section (6) is not less than 30cm.
8. The maintenance blanket for concrete rafts according to claim 1, wherein a plurality of sets of humidity sensors (10) are arranged in the water storage layer (11), and the humidity sensors (10) are electrically connected with a data acquisition instrument.
9. The maintenance blanket for concrete rafts according to claim 1, wherein the laying method thereof comprises the steps of: Step 1, determining the number and arrangement scheme of water injection blankets (2) and functional blankets (4) according to the pouring condition of a large-volume concrete raft (hereinafter referred to as raft), and determining the optimal distribution area of the water injection blankets (2) by combining the area of the raft, wherein the width of the water injection blanket (2) is 150-200 cm, and the width of the functional blanket (4) is 100-120 cm; Step 2, cleaning sundries above the raft, and ensuring that the wicking geotextile (12) below the maintenance blanket is tightly attached to the concrete raft; Step 3, arranging the functional carpets (4) after the water-filling carpets (2) in a mode of arranging the functional carpets, enabling the water-filling carpets (2) to be positioned at the geometric center of the raft and to be distributed in a continuous band shape, and then arranging the functional carpets (4) at two sides of the water-filling carpets (2) distributed in the continuous band shape symmetrically respectively, and carrying out flow production in sequence until the raft is completely covered; step 4, performing lap joint operation of the water injection blanket (2), the functional blanket (4) and the functional blanket (4), wherein during lap joint, the lap joint of the water injection blanket (2) and the functional blanket (4) is performed in a mode that a lap joint section (6) of the water injection blanket (2) is arranged on the upper part, and the lap joint section (6) of the functional blanket (4) is arranged on the lower part, and the lap joint of the functional blanket (4) and the functional blanket (4) is performed in a mode that the lap joint section (6) of the functional blanket (4) which is close to the water injection blanket (2) is arranged on the upper part, and the lap joint section (6) of the functional blanket (4) which is far away from the upper part is arranged on the lower part; Covering a polymer film above the lap joint (5) to ensure that the wicking geotextile (12) is not contacted with the atmospheric environment to cause water loss, and the water can move to the next functional blanket (4) along the lap joint section (6) of the wicking geotextile (12); Step 6, water injection operation is carried out through the water injection port until the water quantity of the water storage layer (11) meets the requirement of maintenance water, the lower end of the water injection pipe (1) enters a certain depth into the water storage layer (11), and the water injection can freely enter the water storage layer (11) and is not blocked; step 7, monitoring the humidity change of the water storage layer (11) in real time through a humidity sensor (10) and a data acquisition instrument, and carrying out supplementary water supplementing operation by means of manpower; Step 8, observing the curing state of the concrete raft, and stopping curing after meeting the standard requirements; And 9, after raft curing, removing the raft curing and the next curing area according to the sequence of the water injection blanket (2) and the functional blanket (4).
10. The method for arranging the curing blanket for the concrete raft according to claim 9, wherein one or more water injection blanket (2) belts are arranged according to the width and the area of the raft, and functional blankets (4) are arranged on two sides of the water injection blanket (2), so that the water guiding efficiency in a coverage area is ensured, and the curing quality is improved; when a plurality of water injection blanket (2) belts exist, the lap joint operation is carried out according to the site condition and the water guide path, so that the full coverage of the area where the raft needs to be maintained is ensured.

Description

Curing blanket for concrete raft and laying method Technical Field The invention relates to the technical field of building construction, in particular to a maintenance blanket for concrete rafts and a layout method. Background The large-volume concrete raft is a large-scale flat plate structure formed by pouring concrete materials in foundation engineering, is mainly used for treating the foundation of a high-rise building or an underground space structure, is connected with complex structures such as columns, walls and beams of the building above the concrete raft, and simultaneously forms an integral bearing layer by coaction with an underground pile foundation structure. In conclusion, the large-volume concrete raft is an important foundation structure form, has wide application prospect in various large buildings, and the concrete construction and maintenance quality of the large-volume concrete raft determines the stability and service life of the foundation of the subsequent building. The existing large-volume concrete curing mode mainly comprises a method for combining heat preservation and moisture preservation, wherein a heat preservation material (such as a plastic film, a gunny bag, a flame-retardant heat preservation quilt and the like) is covered or a wind shielding heat preservation shed is erected, the temperature difference between the inside and the outside of concrete is controlled to reduce heat dissipation of the surface of the concrete, cracks generated due to temperature stress effect are prevented from being generated, the humidity of the surface of the concrete is kept by means of covering wet cloth, spraying curing agent, sprinkling and the like according to the characteristics of climatic environment, excessive rapid evaporation of moisture is prevented, the normal progress of cement hydration reaction is facilitated, and the crack resistance and durability of the concrete are enhanced. However, the existing curing method is rough, a large amount of water resources and industrial products are generally consumed in the curing process, the existing green development concept of China is not met, and the moisturizing curing method of sprinkling or storing water is easy to have the adverse effects of local disease outbreak or multipoint distribution of mass concrete and the like due to the fact that the structural strength of concrete in each area is increased and different due to uneven water distribution. Disclosure of Invention The invention aims to provide a curing blanket for concrete rafts and a layout method thereof, which overcome the defects and the shortcomings of the traditional curing mode of the existing large-volume concrete rafts. The invention is realized by the following measures: The maintenance blanket for the concrete raft is characterized by comprising a plurality of water injection blankets and functional blankets which are arranged on the concrete raft; The water injection blanket and the functional blanket comprise a wicking geotextile and a heat preservation layer, wherein the wicking geotextile is attached to the concrete raft, and the heat preservation layer is arranged on the upper side of the wicking geotextile; the water injection blanket further comprises a water injection pipe and a water storage layer, wherein the water storage layer is arranged between the wicking geotechnical cloth and the heat preservation layer, the edges of the wicking geotechnical cloth, the water storage layer and the heat preservation layer are sewn and fixed to form a whole, and the water injection pipe is provided with a plurality of groups, and the lower end of the water injection pipe penetrates through the heat preservation layer and then stretches into the water storage layer. The invention has the specific characteristics that: The water injection pipe periphery is provided with interlayer fixing device, interlayer fixing device include with the peripheral complex annular slab of water injection pipe, the water injection pipe penetrates the annular slab realizes vertical fixation, the annular slab periphery evenly is provided with a plurality of groups of outer poles of stretching along the circumference, the free end of outer pole of stretching is provided with the landing leg perpendicularly, the upside of landing leg penetrates into in the heat preservation, the downside of landing leg penetrates into in the water storage layer, can realize the tight joint cooperation of reservoir and heat preservation with the help of interlayer fixing device. The wicking geotextile is internally provided with water guiding yarns, the horizontal water guiding and draining effect can be realized by means of the suction difference or the gravity effect, heat can be generated during the hydration reaction of the concrete, and the water guiding capability is obviously enhanced along with the temperature rise. The distance between two adjacent water injection pipes is 1-2m, the lower ends