A ground anti-settling construction method for a helicopter apron

Abstract

The application discloses a ground anti-settlement construction method for a helicopter apron, and comprises the following steps: S1, pouring a concrete layer: first, arranging and leveling a soft soil foundation surface, then laying concrete on the surface, and then pouring a prefabricated steel mesh frame and a steel pipe to form a reinforced concrete layer; S2, laying a compensation layer: then, laying a first quicklime layer and a second quicklime layer from bottom to top on the reinforced concrete layer processed in the S1 stage. When uneven settlement occurs, the staff can inject water into the first quicklime layer through a water injection pipe according to the settlement position, so that the settlement of the helicopter apron can be compensated, meanwhile, the pouring groove in the S1 stage can limit the expansion direction of the second quicklime layer and the first quicklime layer, ensure that the expansion is upward to compensate the settlement distance, and prolong the service life of the helicopter apron.

Description

TECHNICAL FIELD

[0001] The present application relates to the ground construction field for the helipad, in particular to a ground anti-settlement construction method for the helipad. BACKGROUND

[0002] The helipad is a platform for the take-off and landing of the helicopter, which is required to be equipped with corresponding navigation equipment, air traffic control communication service equipment, meteorological facilities, fire rescue equipment, airport signs and the like. The helipad is prone to vertical deformation or subsidence of the ground and foundation soil caused by compression under the action of heavy pressure or other external reasons during long-term use. The subsidence is divided into two types, namely uniform subsidence and uneven subsidence. The uniform subsidence will affect the height of the helipad, and the uneven subsidence will cause additional stress of the helipad to cause cracks, even partial component fracture, and further affect the safety of the helicopter.

[0003] Through retrieval, it is found that the typical helipad construction method in the prior art is a construction method of a concrete surface layer of a helipad pavement structure, which comprises the following steps: supporting a support formwork on a base layer to enclose a space for paving concrete; paving the concrete into the space enclosed by the support formwork to form a paving concrete layer; vibrating the paving concrete layer by using a vibrating rod and a vibrating machine respectively; rolling a roller on the surface of the paving concrete layer after vibration to complete the pumping of the concrete, and then sliding the roller on the surface of the paving concrete layer to smooth the paving concrete layer; waiting for the concrete to solidify, and then performing a roughening operation on the surface of the paving concrete layer to form a rough surface, and then sequentially performing curing, joint cutting and joint embedding. The main feature is that the method can improve the bending strength of the concrete surface layer to meet the working requirements of the helicopter.

[0004] In summary, the helipad constructed by the existing helipad construction method cannot compensate for a certain subsidence part when uneven subsidence occurs, thereby affecting the use of the helipad, i.e., shortening the service life of the helipad. In view of the above problems, the existing equipment needs to be improved. SUMMARY

[0005] The present application aims to provide a ground anti-settlement construction method for the helipad to solve the problem that the helipad constructed by the existing helipad construction method cannot compensate for a certain subsidence part when uneven subsidence occurs, thereby affecting the use of the helipad, i.e., shortening the service life of the helipad.

[0006] To achieve the above object, the application provides the following technical scheme: a ground anti-settling construction method for a helipad, comprising the following steps:

[0007] S1: pouring a concrete layer:

[0008] First, the soft soil ground surface is leveled, then concrete is laid thereon, and then prefabricated steel mesh frames and steel pipes are poured to form a reinforced concrete layer;

[0009] S2: laying a compensation layer:

[0010] Then, the first and second raw lime layers are laid on the reinforced concrete layer treated in the S1 stage from bottom to top, and the first raw lime layer is laid in the concrete pouring groove;

[0011] S3: laying a filler layer:

[0012] The gaps between the concrete pouring grooves in the S2 stage are filled with gravel and sand, and the concrete prefabricated slab is poured to form a top;

[0013] S4: pouring a ground surface layer:

[0014] The soil is laid on the pouring peak in the S3 stage and is compacted by rolling, and this is repeated three times to form a soil sealing layer, and the concrete is poured on the soil sealing layer to form a concrete helipad ground surface;

[0015] S5: repairing and polishing the surface layer:

[0016] The concrete helipad ground surface treated in the S4 stage is polished by using external equipment, and the cracks formed on the ground surface are repaired, and the individual pits and depressions are filled, and the leveling is simultaneously achieved after the above operations are completed;

[0017] S6: waterproof and anti-skid treatment:

[0018] The waterproof bottom glue is used to apply glue to all places on the helipad surface layer treated in the S5 stage, and the anti-skid material is laid after the glue is dry and hardened.

[0019] Preferably, the leveling soft soil ground process in the S1 stage comprises alternately rolling and tamping by using a road roller and a tamper, and a gravel layer is laid between the soft soil ground and the first layer of raw lime.

[0020] Preferably, the prefabricated steel mesh frame in the S1 stage is provided with a vibrating rod for auxiliary vibration during pouring, so as to avoid the formation of bubbles and cavities, and the steel mesh frame in the S1 stage is used in combination with a steel pipe frame, the steel pipe frame adopts a full-section I20b type steel frame with a spacing of 1 span / 0.6 m, double-row φ42 advanced small guide pipes are arranged at the arch part for pre-supporting, the ring spacing is 40 cm, and the longitudinal spacing is 3.

[0021] Preferably, the concrete pouring groove of the S2 stage is filled with gravel and sand, and the size of the gravel is 3-5 cm.

[0022] Preferably, the first and second quicklime layers of the S2 stage are provided with water injection pipes, and the first quicklime layer is provided with a plurality of concrete pouring grooves in a rectangular array, while the second quicklime layer has only one concrete pouring groove.

[0023] Preferably, the top of the water injection pipe of the S2 stage is sealed by a detachable structure, and the top of the water injection pipe is provided with a corresponding code.

[0024] Preferably, the thickness of the concrete layer of the S3 and S4 stages is 12-15 cm, and the concrete layer is sprayed with water for curing every 6-8 hours for 3-5 days, and the 28-day flexural strength of the concrete surface layer of the S3 and S4 stages is not less than 4.5 MPa, and the 90-day flexural strength is not less than 5.0 MPa, the slump of the concrete surface layer is 30-50 mm, and the water-binder ratio of the raw material concrete of the S3 and S4 stages is 1:2-3, the water-cement ratio is 1:2-2.5, and the sand ratio is 30-35%.

[0025] Preferably, the S5 stage first uses a grinder to polish the uneven surface of the ground, and uses a dust removal device to clean the dust generated by polishing, and then uses cement mortar or the same type of pouring slurry to fill the cracks and cracks on the ground.

[0026] Preferably, the S5 stage uses the self-leveling process of water flowing to the low place to cover the entire apron surface with water after polishing and filling, and then uses a marker to circle the edge of the location with standing water, and finally uses cement mortar or the same type of pouring slurry to pave the place until the ground surface of the apron is level.

[0027] Preferably, the S6 stage is paved with a waterproof material of a silicon PU material, and the waterproof bottom glue and the silicon PU material are both paved in 2-3 layers, and the silicon PU needs to be tested for moisture before being paved to ensure that the base layer has no curing agent, oil, grease, paint, dust and other impurities, and cannot have cracks, bumps and honeycomb, etc. If it does not meet the requirements, it needs to be repaired or re-leveled and repaired.

[0028] Compared with the prior art, the beneficial effects of the present application are:

[0029] (1) the present application can effectively solve the uneven settlement of the existing helipad construction method by the cooperation of S2 stage and S1 stage, so as to solve the problem that the helipad cannot be used due to uneven settlement, that is, the service life of the helipad is short, the staff can control the compensation single height by the amount of water injection, on the other hand, when uneven settlement occurs, the staff can inject water into the first lime layer at the position according to the settlement position, so as to compensate for the settlement of the helipad, and the groove poured in S1 stage can limit the expansion direction of the second layer of lime and the first layer of lime, ensure the upward expansion to compensate for the settlement distance, and avoid the problem that the helipad cannot be used due to settlement, thereby prolonging the service life of the helipad;

[0030] (2) the present application can effectively solve the problem that the existing helipad construction method is prone to deformation and bulging of silicon PU, reduces the waterproof and anti-skid performance, and shortens the service life of the helipad, the S6 stage of the present application ensures the quality by laying multiple layers of waterproof bottom glue and silicon PU material, and the S6 stage of the present application adds an inspection process before laying compared with the traditional construction method, that is, the inspection of the base layer before laying includes the flatness, cracking and level of the ground, and whether there are curing agent, oil, grease, paint, dust and other sundries after the construction of S5 stage, if it does not meet the requirements, it will be repaired or re-flattened, so as to ensure the waterproof and anti-skid performance of the helipad. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 the control relationship between S1-S6 of the present application is a work flow diagram;

[0032] Figure 2 the preparation items in S5 of the present application are shown in the schematic diagram;

[0033] Figure 3 the first lime layer and the number of concrete pouring grooves in S2 stage of the present application are shown in the schematic diagram;

[0034] Figure 4 the second lime layer and the number of concrete pouring grooves in S2 stage of the present application are shown in the schematic diagram. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0036] Please refer to Figures 1-4 The present application provides a technical solution: a ground anti-settlement construction method for a helicopter apron, comprising the following steps:

[0037] S1: pouring a concrete layer:

[0038] First, the soft soil foundation surface is arranged and leveled, then concrete is laid thereon, and then prefabricated steel mesh frames and steel pipes are poured to form a reinforced concrete layer;

[0039] The process of leveling the soft soil foundation in the S1 stage includes alternating rolling and tamping using a road roller and a tamper, and a gravel layer is laid between the soft soil foundation and the first layer of quicklime.

[0040] Preferably, the prefabricated steel mesh frame in the S1 stage is provided with a vibrating rod for auxiliary vibration during pouring, thereby avoiding the formation of bubbles and cavities, and the steel mesh frame in the S1 stage is used in combination with a steel pipe frame, the steel pipe frame adopts a full-face I20b type steel frame with a spacing of 1 bay / 0.6 m, and double rows of φ42 advanced small guide pipes are provided at the arch portion for pre-supporting with a circumferential spacing of 40 cm and a longitudinal spacing of 3.

[0041] S2: laying a compensation layer:

[0042] Then, the first quicklime layer and the second quicklime layer are laid on the reinforced concrete layer treated in the S1 stage from bottom to top, and the first quicklime layer is laid in the groove poured with concrete;

[0043] Preferably, the grooves poured with concrete in the S2 stage are filled with gravel and sand between them, and the gravel has a diameter of three to five centimeters.

[0044] Preferably, the first quicklime layer and the second quicklime layer in the S2 stage are both provided with water injection pipes, the first quicklime layer is distributed with multiple grooves poured with concrete in a rectangular array, and the second quicklime layer has only one groove poured with concrete.

[0045] Preferably, the top of the water injection pipe in the S2 stage is sealed by a detachable structure, and the top of the water injection pipe is provided with a corresponding code.

[0046] S3: laying a filler layer:

[0047] Fill the gap between the concrete pouring groove of S2 stage with gravel and sand, and pour the top with concrete precast slab;

[0048] S4: Pouring the ground surface layer:

[0049] Lay the soil on the top of the pouring peak of S3 stage and compact it, repeat this process three times to form the soil sealing layer, and pour the concrete on the soil sealing layer to form the concrete apron ground surface;

[0050] Preferably, the thickness of the concrete layer of S3 stage and S4 stage is 12-15 cm, and the concrete layer is sprayed with water for curing every 6-8 hours, respectively for 3-5 days, while the 28-day flexural strength of the concrete surface layer of S3 stage and S4 stage is not less than 4.5 MPa, and the 90-day flexural strength is not less than 5.0 MPa, the slump of the concrete surface layer is 30-50 mm, and the water-binder ratio of the raw material concrete of S3 stage and S4 stage is 1:2-3, the water-cement ratio is 1:2-2.5, and the sand ratio is 30-35%.

[0051] S5: Repair and polish the surface layer:

[0052] Use external equipment to polish the concrete apron ground surface treated in S4 stage and repair the cracks formed on the ground surface, and fill the individual pits and depressions, and complete the above operations to achieve leveling at the same time;

[0053] Preferably, the S5 stage first polishes the uneven places on the ground surface with a polisher, and then uses a dust removal device to clean the dust generated during polishing, and then uses cement mortar or the same type of pouring mortar to fill the cracks and cracks on the ground surface.

[0054] Preferably, after polishing and filling in the S5 stage, use the self-leveling process that water flows to the lower place to cover the apron surface layer with water, then use a marker to circle the edges of the waterlogged position, and finally use cement mortar or the same type of pouring mortar to pave this place until the ground surface of the apron reaches the level.

[0055] S6: Waterproof and anti-skid treatment:

[0056] Use waterproof primer to apply glue to all places on the apron surface layer treated in S5 stage, and after the glue is dry and hardened, lay the anti-skid material.

[0057] Preferably, the S6 stage is laid by waterproof material of silicon PU material, and the waterproof primer and the silicon PU material are laid for 2-3 layers, and before the silicon PU is laid, a moisture experiment needs to be carried out to ensure that the base layer has no curing agent, oil, grease, paint, dust and other sundries, and there is no crack, bump and honeycomb and the like, and if it does not meet the requirements, it needs to be repaired or re-leveling repair.

[0058] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified or some technical features can be replaced by equivalent ones by those skilled in the art, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A ground anti-settling construction method for a helipad, comprising the following steps, characterized in that: S1: pouring a concrete layer: First, arrange and level the soft soil foundation surface, then lay concrete on it, and then pour the prefabricated steel mesh frame and steel pipe to form a reinforced concrete layer; S2: laying a compensation layer: Then lay the first and second quicklime layers on the reinforced concrete layer treated in step S1 from bottom to top, and the first quicklime layer is laid in the concrete pouring groove, the first and second quicklime layers are provided with water injection pipes, and the first quicklime layer is provided with a plurality of concrete pouring grooves in a rectangular array, while the second quicklime layer has only one concrete pouring groove; S3: laying a filler layer: Use gravel and sand to fill the gaps between the concrete pouring grooves in step S2, and pour the concrete precast slab to seal the top; S4: pouring a ground layer: Lay soil on the pouring top of step S3 and compact it, repeat this process three times to form a soil sealing layer, and pour concrete on the soil sealing layer to form a concrete helipad ground; S5: repairing and polishing the surface layer: Use external equipment to polish the concrete helipad ground treated in step S4 and repair the cracks formed on the ground, and fill the individual pits and depressions, which are simultaneously leveled; S6: waterproof and anti-skid treatment: Use waterproof bottom glue to apply glue to all places on the helipad surface layer treated in step S5, and lay anti-skid materials after the glue is dry and hardened.

2. A method for ground anti-settling construction of a helipad according to claim 1, characterized in that: The leveling process of the soft soil foundation in step S1 includes alternating compaction and tamping using a road roller and a tamper, and a gravel layer is laid between the soft soil foundation and the first layer of quicklime.

3. A method for ground anti-settling construction of a helipad according to claim 1, characterized in that: The prefabricated steel mesh frame in step S1 is provided with a vibrating rod for auxiliary vibration during pouring, which avoids the formation of bubbles and cavities, and the steel mesh frame in step S1 is used with a steel pipe frame, which adopts a full-section I20b type steel frame with a spacing of 1 bay / 0.6m, double-row φ42 advanced small guide pipe pre-supporting at the arch part, a ring spacing of 40cm, and a longitudinal spacing of 3m.

4. A method for ground anti-settling construction of a helipad according to claim 1, characterized in that: The concrete pouring grooves in step S2 are filled with gravel and sand, and the gravel specifications are three to five centimeters in diameter.

5. A method for ground anti-settling construction of a helipad according to claim 1, characterized in that: The top of the water injection pipe in step S2 is sealed by a detachable structure, and the top of the water injection pipe is provided with a corresponding code.

6. A method for ground anti-settling construction of a helipad according to claim 1, characterized in that: The thickness of the concrete layer in steps S3 and S4 is 12-15cm, and the concrete layer is sprayed with water every 6-8 hours for curing, for three to five days respectively, and the 28-day flexural strength of the concrete surface layer in steps S3 and S4 is not less than 4.5MPa, and the 90-day flexural strength is not less than 5.0MPa, the slump of the concrete surface layer is 30-50mm, and the water-cement ratio of the raw material concrete in steps S3 and S4 is 1:2-3, the water-cement ratio is 1:2-2.5, and the sand ratio is 30-35%.

7. A method for ground anti-settling construction of a helipad according to claim 1, characterized in that: The step S5 firstly polishes the uneven ground with a sander, and then cleans the dust generated by the polishing with a dust cleaning device, and then fills the cracks and cracks on the ground with cement mortar or the same type of pouring slurry.

8. A method for ground anti-settling construction of a helipad according to claim 1, characterized in that: The step S5 uses the self-leveling process to cover the entire apron surface with water after polishing and filling, and then uses a marker to circle the edges of the waterlogged area, and finally uses cement mortar or the same type of pouring slurry to pave the area until the ground surface of the apron is level.

9. A method for ground anti-settling construction of a helipad according to claim 1, characterized in that: In the step S6, waterproof treatment is performed using waterproof materials made of silicon PU material, and 2-3 layers of waterproof primer and silicon PU material are laid, and before the silicon PU is laid, a moisture test is required to ensure that the base layer has no curing agent, oil, grease, paint, dust and other sundries, and there is no crack, bump or honeycomb. If it does not meet the requirements, it needs to be repaired or re-leveled and repaired.

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