A baseball field structure and construction method on soft soil foundation

Abstract

The invention relates to a baseball sports field structure on a soft soil foundation and a construction method, comprising a turtleback field and a drainage system. The terrain of the turtleback field gradually descends from a high place to the surrounding areas, presenting a natural slope. The drainage system comprises an annular drainage ditch surrounding the turtleback field, a plurality of blind ditches arranged at intervals in the turtleback field, and a blind pipe laid in the blind ditch. The two ends of the blind pipe are respectively connected to the annular drainage ditch, and a water-permeable hole is arranged in the lower part of the blind pipe. The foundation of the turtleback field is a soft soil foundation. An annular drainage ditch and a blind ditch are pre-dug on the soft soil foundation to form a reinforced concrete base. Concrete is poured on the surface of the soft soil foundation, the annular drainage ditch and the blind ditch to form a reinforced concrete base. Gravel is filled in the blind ditch until it is flush with the surface of the reinforced concrete base on both sides of the blind ditch. Permeable asphalt is poured on the surface of the reinforced concrete base. A high-performance permeable elastic pad is laid on the surface of the permeable asphalt. An artificial turf is laid on the surface of the high-performance permeable elastic pad.

Description

Technical Field

[0001] The invention relates to the structural design of a sports field, and in particular to a baseball sports field structure on a soft soil foundation and a construction method. Background Art

[0002] The structural design of sports venues not only needs to consider the characteristics of the sports events, but also needs to focus on solving the drainage problem of the sports venues. Especially for sports venues exposed outdoors, the drainage structure design is very important. If the design is unreasonable, it will affect the normal use of the sports venues. The drainage methods of existing sports venues can be divided into two methods: slope drainage and vertical infiltration drainage. For amateur sports venues, since there are no rigid requirements for the recovery time of the venue, the slope + natural infiltration method is generally used. However, for professional sports venues such as baseball, it is required to resume the game as soon as possible after the rain stops, so it is often necessary to use a combination of slope drainage + vertical drainage. However, this method still has the following shortcomings:

[0003] 1. Slope drainage relies on gravity to drain most of the rainwater in the venue through the vertical and horizontal slopes of the venue. This requires a larger slope to achieve the purpose of rapid drainage. However, for professional sports venues, in order to meet the needs of the competition, the slope of the venue must be limited to a certain range so as not to affect the athletes' running on the spot. Therefore, the effect of drainage relying solely on slope is limited.

[0004] 2. For sports venues built on soft soil foundations, it is difficult for the remaining water from the surface slope to penetrate vertically into the blind ditch of the base layer and then be discharged outside the venue. Due to the poor bearing capacity of the soft soil foundation, the traditional method is to increase the bearing capacity by replacing the filling, but it is easily damaged by rainwater infiltration and erosion.

[0005] 3. The soft soil foundation has poor water permeability. The retained water can easily cause the soil to dissolve into mud, and the mud can easily clog the filter cloth wrapped outside the blind pipe in the blind ditch, resulting in poor drainage.

[0006] 4. The traditional method of installing blind pipes in blind ditches is to place the holes of the blind pipes upwards and use the pipe grooves without holes below as water flow channels, which can easily cause pipe blockage due to sediments.

[0007] 5. Since the permeable holes of the blind pipes in the blind ditch are facing upward, the water below the holes cannot be drained through the blind pipes and can only be drained through natural infiltration. Due to the poor permeability of the soft soil foundation, the water at the bottom of the blind pipes is always retained in the permeable layer, which leads to a decrease in the water storage capacity of the permeable layer and an increase in the amount of water accumulated on the surface of the site. Summary of the invention

[0008] The invention firstly discloses a baseball sports field structure on a soft soil foundation, which can not only meet the field requirements of baseball games, but also increase the drainage speed to improve the drainage effect.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A baseball field structure on a soft soil foundation comprises a turtleback field and a drainage system. The terrain of the turtleback field gradually descends from a high place to the surrounding areas, presenting a natural slope. The drainage system comprises an annular drainage ditch surrounding the turtleback field, a plurality of blind ditches arranged at intervals in the turtleback field, and a blind pipe laid in the blind ditch. The two ends of the blind pipe are respectively connected to the annular drainage ditch, and a water permeable hole is arranged at the bottom of the blind pipe. The foundation of the turtleback field is a soft soil foundation. An annular drainage ditch and a blind ditch are pre-dug on the soft soil foundation to form a reinforced concrete base. Concrete is poured on the surface of the soft soil foundation, the annular drainage ditch and the inside of the blind ditch to form a reinforced concrete base. Gravel is filled in the blind ditch until it is flush with the surface of the reinforced concrete base on both sides of the blind ditch. Permeable asphalt is poured on the surface of the reinforced concrete base. A high-performance permeable elastic pad is laid on the surface of the permeable asphalt. An artificial turf is laid on the surface of the high-performance permeable elastic pad. The slope of the reinforced concrete base between adjacent blind ditches is 2% from the middle to the blind ditches on both sides. The blind pipe in the blind ditch is 0.5% from the middle to the two sides and connected to the annular drainage ditch.

[0011] Furthermore, the blind pipe adopts a HDPE double-wall corrugated pipe, the water-permeable holes are opened at the trough position of the corrugated pipe, the water-permeable holes face the bottom side of the blind ditch, and the outside of the blind pipe is wrapped with gauze.

[0012] Furthermore, the permeable asphalt includes medium-grained permeable asphalt laid on the lower part and fine-grained permeable asphalt laid on the upper part.

[0013] Furthermore, the wall of the blind ditch is inclined.

[0014] Furthermore, the turtleback field includes a right-angled fan-shaped area, the right-angled sides of the right-angled fan-shaped area are sidelines, the right angles of the right-angled fan-shaped area are surrounded by home base, first base, second base, and third base to form a square infield area, the right-angled fan-shaped area outside the infield area is the outfield area, bases are respectively set in the first base, second base, and third base, a home plate is set in the home base, a pitcher's board is set in the middle of the infield area, and a fence is set around the edge of the turtleback field.

[0015] Furthermore, the middle part of the square inner field area is high, and the slope is adjusted toward the four bases from the middle at a slope of 0.3%. The drainage slope from the square inner field area to the outer field area is maintained at 0.27%, and there is a natural slope from the outer field area to the circular drainage ditch.

[0016] Furthermore, the sideline is 97.54 m long, the distance from home base to center field via second base is 121.92 m, the spacing between adjacent bases is 27.43 m, and the distance between the front center of the pitcher's plate and the tip of home base is 18.44 m.

[0017] Furthermore, the height of the fence behind the home plate is 1.2 m, and the height of the fence in other areas is 2.8 m. A soft net is hung between the fence behind the home plate and the awning.

[0018] The present invention also discloses a construction method for a baseball stadium on the soft soil foundation, which comprises the following steps:

[0019] Step 1: Use an excavator to level the soft soil foundation site and pre-dig a circular drainage ditch and a blind ditch;

[0020] Step 2: Tie the site base and blind ditch steel bars. The steel bars are set in two directions in a single layer. After the steel bars are tied, concrete is poured to form a reinforced concrete base.

[0021] Step 3: Lay gravel in the blind ditch, lay a layer of gravel along the central axis of the blind ditch toward the circular drainage ditch on both sides and perform slope finding;

[0022] Step 4: bury the blind pipe on the gravel laid in the blind ditch. First, wrap the blind pipe with water holes with a circle of gauze, then place the blind pipe on the gravel with the water holes facing down, and then backfill the gravel around the blind pipe until the ditch mouth is flush;

[0023] Step 5: Pave permeable asphalt. The permeable asphalt is spread by a paver and constructed in layers. The lower layer uses medium-grained permeable asphalt, and the upper layer uses fine-grained permeable asphalt.

[0024] Step 6: Spread the high-performance water-permeable elastic pad. Mix the glue, black environmentally friendly rubber particles and quartz sand, spread it with a paver, flatten the joints, spread and compact it, and measure the flatness of the buffer layer.

[0025] Step 7: Lay the artificial turf, spread the grass rolls parallel to the center line, glue the adjacent grass rolls with seam cloth, and then seal the edges of the venue.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. Compared with the treatment method of replacing the soft soil base, the reinforced concrete base increases the bearing capacity and durability of the base, avoids rainwater penetration and damage, reduces construction costs, reduces later maintenance costs, and improves the economic benefits of the project. The smooth concrete base can speed up the convergence of rainwater.

[0028] 2. The venue adopts turtleback slope drainage and vertical drainage methods, so that most of the rainwater relies on gravity to drain out of the venue through the surface of the venue. The remaining rainwater penetrates into the ground through the artificial turf and flows into the circular drainage ditch through blind pipes. This can ensure that the sports venue can resume competition within 30 minutes after heavy rain, thereby improving the utilization rate of the venue.

[0029] 3. The blind pipe water holes are placed downwards so that water can seep into the blind pipe from the bottom of the blind ditch, which solves the problem of blind pipes being blocked by sediments and avoids the failure of drainage in the site in the later stage. Compared with the prior art in which the water holes are placed upwards, the water in the lower part of the pipe can only be discharged by natural infiltration and cannot be discharged by the blind pipe. The water holes are placed downwards so that rainwater in the original pipe part can also be discharged from the bottom water holes, increasing the water storage capacity of the permeable layer and reducing or eliminating water accumulation on the surface of the site.

[0030] 4. Lay permeable asphalt of different particle sizes on the reinforced concrete base to improve the penetration effect of rainwater and accelerate the drainage and penetration speed, so that the competition function of the venue can be restored in a short time after rain. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a transverse cross-sectional view of a vertical drainage system for a baseball stadium in an embodiment;

[0032] Figure 2 A longitudinal cross-sectional view of a vertical drainage system for a baseball stadium in an embodiment;

[0033] Figure 3 The blind pipe in the embodiment adopts the opening diagram of the HDPE double-wall corrugated pipe;

[0034] Figure 4 is a plan view of a blind ditch of a baseball stadium in the embodiment;

[0035] Figure 5 A plan view of a baseball field in an embodiment using turtleback slope drainage;

[0036] Figure 6 It is a structural plan view of a baseball stadium in the embodiment.

[0037] Description of reference numerals:

[0038] 1-soft soil foundation, 2-reinforced concrete base, 3-blind pipe, 301-permeable hole, 4-blind ditch, 5-grained stone, 6-medium-grained permeable asphalt, 7-fine-grained permeable asphalt, 8-high-performance permeable elastic pad, 9-artificial turf, 10-turtleback field, 1001-fence, 1002-home plate, 1003-base bag, 1004-pitcher's board, 1005-home plate, 1006-first base, 1007-second base, 1008-third base, 1009-infield, 1010-outfield, 11-circular drainage ditch. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0040] This embodiment discloses a baseball stadium structure and construction method on a soft soil foundation. The baseball stadium is built on a soft soil foundation 1. The entire stadium is a turtleback-shaped stadium 10 and is equipped with a drainage system that combines slope drainage and vertical drainage.

[0041] The structural design of the baseball field in this embodiment is as follows: Figure 6 As shown, the turtleback court includes a right-angled fan-shaped area, and the two right-angled sides of the right-angled fan-shaped area are the sidelines for distinguishing inside and outside the field, and the length of the two sidelines in the court is 97.54m. The right angle of the right-angled fan-shaped area is surrounded by home base 1005, first base 1006, second base 1007, and third base 1008 to form a square infield area 1009, and the right-angled fan-shaped area outside the infield area 1009 is the outfield area 1010, and bases 1003 are respectively set in the first base 1006, the second base 1007, and the third base 1008, and the home plate 1002 is set in the home base 1005, and the pitcher's board 1004 is set in the middle of the infield area 1009, and the fence 1001 is set around the edge of the turtleback court.

[0042] The structure of the baseball stadium is designed in full accordance with the requirements of professional baseball games. The distance from home base 1005 to the outside of the center field through second base 1007 is 121.92 meters. The distance between two adjacent bases in the inner field is 27.43 meters. The distance between the front center of the pitcher's plate 1004 and the tip of the home base 1005 is 18.44 meters. The home plate 1002 is made of white rubber material and is pentagonal. The home plate 1002 is fixed on the ground and flush with the ground. The base bag 1003 is a square white canvas bag with a side length of 381 mm and a thickness of 76 mm to 127 mm. The pitcher's plate 1004 is made of white rubber material. The pitcher's plate 1004 is 610 mm long and 152 mm wide. The setting of fence 1001, the height of fence 1001 within 90° behind home base 1005 is set to 1.2m, and a soft net is hung between it and the canopy above for protection. The height of fence 1001 in other areas is set to 2.8m. When setting fence 1001, DN65 steel pipes are used as columns, and the columns are set up at intervals of 3m. The bottoms of adjacent columns are connected with horizontal steel pipes 50mm above the ground. The suspended part of the horizontal steel pipe serves as a drainage gap for rainwater on the surface of the venue. PE plastic-coated wire mesh is stretched between adjacent columns as a fence, and the suspended soft net is made of transparent glass fiber material.

[0043] The above-mentioned turtleback site has a slope drainage design. Figure 5As shown, the terrain of the entire turtleback-type field is a natural slope that gradually descends from the high point to the surrounding areas. Among them, the square inner field area 1009 is high in the middle and low in the surrounding areas. From the middle, the slope is 0.3% to the four bases. The drainage slope from the square inner field area 1009 to the outer field area 1010 is maintained at 0.27%. The outer field area 1010 to the circular drainage ditch 11 surrounding the turtleback-type field is a natural slope. Designed according to the above slope, rainwater in the field can be quickly discharged into the circular drainage ditch 11.

[0044] In this embodiment, the vertical drainage design in the turtleback type site is as follows: Figures 1 to 4 As shown, the soft soil foundation 1 is the original soil or backfill soil after disturbance. The soft soil foundation 1 is leveled and compacted after pre-digging drainage ditches by an excavator. The drainage ditch includes a circular drainage ditch 11 around the edge of the turtleback site and a plurality of blind ditches 4 opened at equal intervals perpendicular to the center axis of the site (e.g., evenly distributed in the site at intervals of 4m). The blind ditch 4 is formed after the pre-digging drainage ditch is poured with base concrete. The ditch wall of the blind ditch 4 is inclined, and the angle between the ditch wall and the poured reinforced concrete base 2 is 120°. The inclined ditch wall can speed up the drainage speed. When pouring concrete, the surface of the soft soil foundation 1, the circular drainage ditch 11 and the inside of the blind ditch 4 are poured to form a reinforced concrete base 2. The reinforced concrete base 2 is equipped with a single layer of bidirectional steel bars, which can protect the soft soil foundation 1 from rainwater erosion and improve the bearing capacity of the foundation. The drainage slope in the circular drainage ditch 11 is 0.3%, which is used to collect rainwater on the site surface and vertically infiltrated rainwater. When pouring concrete between adjacent blind ditches 4 , the slope of the reinforced concrete base 2 between adjacent blind ditches 4 is reduced from the middle at 2% to the blind ditches 4 on both sides, so as to accelerate the collection of surface rainwater into the blind ditches 4 .

[0045] A blind pipe 3 is laid in each blind ditch 4. The blind pipe 3 in this embodiment adopts a HDPE double-wall corrugated pipe. A water-permeable hole 301 is opened along a 180° range at the bottom trough of the corrugated pipe. When the blind pipe 3 is laid, the water-permeable hole 301 faces the bottom of the blind ditch 4 downward, which can ensure that the water permeability (water permeability refers to the ratio of the perforated area per meter of the pipe to the pipe area) is above 40%, and it can ensure that the rainwater at the bottom of the blind ditch 4 can also be discharged through the blind pipe 3, which solves the problem of channel blockage caused by sediment in the blind pipe 3 and avoids the occurrence of drainage failure in the field in the later stage. Taking a corrugated pipe with a diameter of 16 cm as an example, if the water-permeable hole 301 is set 8 cm upward, and the remaining 8 cm has no hole, when the total length of the blind ditch 4 in the baseball field is 3350 meters, the amount of water accumulated in this part is 3350×0.08×0.16=42.88 cubic meters (tons of water), which needs to be discharged by natural infiltration, and cannot be discharged by the blind pipe 3. However, if the water-permeable hole 301 is set downward, rainwater in the original pipe part can also be discharged from the bottom water-permeable hole, increasing the water storage capacity of the permeable layer, reducing or eliminating water accumulation on the surface of the site. The outside of the blind pipe 3 is wrapped with gauze, and the blind pipe 3 in the blind ditch 4 is sloped from the center axis of the site to both sides at 0.5%, and finally connected to the annular drainage ditch 11.

[0046] After the blind pipe 3 is laid, gravel 5 is filled in the blind ditch 4 until the gravel 5 is flush with the surface of the reinforced concrete base 2 on both sides of the blind ditch 4. The gravel 5 is made of small rocks with a particle size of φ10mm-30mm, which has good water permeability and plays the role of dispersing stress and transitional bearing capacity. After the gravel 5 is filled, permeable asphalt is poured on the surface of the reinforced concrete base 2. The permeable asphalt in this embodiment is divided into two layers, the lower layer is medium-grained permeable asphalt 6, and the upper layer is fine-grained permeable asphalt 7. The permeable asphalt uses OGFC asphalt. The surface structure of OGFC asphalt is well developed, and there are a large number of interconnected pores inside. The porosity reaches 20.33%, which is conducive to rainwater infiltration, and the amount used is minimal, which is green and economical. A layer of high-performance permeable elastic pad 8 is laid on the surface of the fine-grained permeable asphalt 7, which can provide good shock absorption performance and reduce the damage caused by athletes falling. An artificial lawn 9 is laid on the surface of a high-performance water-permeable elastic pad 8. The artificial lawn 9 is woven from grass clusters. The bottom of the artificial lawn 9 is woven from polypropylene material and can be arranged on asphalt. It is easy to construct, has good water permeability, and is simple to maintain in the later stage.

[0047] The turtleback type field designed in this embodiment adopts a combination of slope drainage and vertical drainage, so that most of the rainwater relies on gravity to drain out of the field through the surface of the field, and the remaining rainwater can penetrate into the ground through the artificial turf 9 and then converge into the annular drainage ditch 11 through the blind pipe 3, which can ensure that the sports field can resume the game within 30 minutes after heavy rain, thereby improving the utilization rate of the field.

[0048] The construction method of the baseball field structure on the soft soil foundation disclosed in this embodiment includes the following steps:

[0049] Step 1: Use an excavator to level the soft soil foundation site and pre-dig a circular drainage ditch and a blind ditch;

[0050] Step 2: Tie the site base and blind ditch steel bars. The steel bars are set in two directions in a single layer. After the steel bars are tied, concrete is poured to form a reinforced concrete base.

[0051] Step 3: Lay gravel in the blind ditch, lay a layer of gravel along the central axis of the blind ditch toward the circular drainage ditch on both sides and perform slope finding;

[0052] Step 4: bury the blind pipe on the gravel laid in the blind ditch. First, wrap the blind pipe with water holes with a circle of gauze, then place the blind pipe on the gravel with the water holes facing down, and then backfill the gravel around the blind pipe until the ditch mouth is flush;

[0053] Step 5: Pave permeable asphalt. The permeable asphalt is spread by a paver and constructed in layers. The lower layer uses medium-grained permeable asphalt, and the upper layer uses fine-grained permeable asphalt.

[0054] Step 6: Spread the high-performance water-permeable elastic pad. Mix the glue, black environmentally friendly rubber particles and quartz sand, spread it with a paver, flatten the joints, spread and compact it, and measure the flatness of the buffer layer.

[0055] Step 7: Lay the artificial turf, spread the grass rolls parallel to the center line, glue the adjacent grass rolls with seam cloth, and then seal the edges of the venue.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A baseball field structure on a soft soil foundation, characterized by: The invention comprises a turtleback site and a drainage system. The terrain of the turtleback site gradually descends from a high place to the surrounding areas, presenting a natural slope. The drainage system comprises a circular drainage ditch surrounding the turtleback site, a plurality of blind ditches opened at intervals in the turtleback site, and blind pipes laid in the blind ditch. The plurality of blind ditches are opened at equal intervals along a direction perpendicular to the central axis of the turtleback site. Both ends of the blind pipes are respectively connected to the circular drainage ditch. The blind pipes adopt HDPE double-wall corrugated pipes. Water-permeable holes are opened at the bottom trough of the corrugated pipe along a range of 180°, so that the water-permeable holes face one side of the bottom of the blind ditch. The outside of the blind pipes is wrapped with gauze. The foundation of the turtleback site is a soft soil foundation. A circular drainage ditch and a blind ditch are pre-dug on the soft soil foundation. Concrete is poured on the surface, inside the annular drainage ditch and blind ditch to form a reinforced concrete base. The reinforced concrete base is equipped with a single-layer bidirectional steel bar. The blind ditch is filled with crushed stone until it is flush with the surface of the reinforced concrete base on both sides of the blind ditch. Permeable asphalt is poured on the surface of the reinforced concrete base. The permeable asphalt includes medium-grained permeable asphalt laid on the bottom and fine-grained permeable asphalt laid on the top. High-performance permeable elastic pads are laid on the surface of the permeable asphalt, and artificial turf is laid on the surface of the high-performance permeable elastic pads. The slope of the reinforced concrete base between adjacent blind ditches is 2% from the middle to the blind ditches on both sides. The blind pipe in the blind ditch is sloped from the middle to both sides at 0.5% and connected to the annular drainage ditch. The drainage slope in the annular drainage ditch is 0.3%; The turtleback field includes a right-angled fan-shaped area, the right-angled sides of the right-angled fan-shaped area are sidelines, the right angles of the right-angled fan-shaped area are surrounded by home base, first base, second base and third base to form a square infield area, the right-angled fan-shaped area outside the infield area is the outfield area, base bags are respectively arranged in the first base, second base and third base, a home plate is arranged in the home base, a pitcher's board is arranged in the middle of the infield area, and a fence is arranged around the edge of the turtleback field; The middle part of the inner field area of ​​the square is high, and the slope is adjusted toward the four bases from the middle at a slope of 0.3%. The drainage slope from the inner field area to the outer field area of ​​the square is maintained at 0.27%, and there is a natural slope from the outer field area to the circular drainage ditch.

2. The baseball field structure on a soft soil foundation according to claim 1, characterized in that: The wall of the blind ditch is inclined.

3. The baseball field structure on a soft soil foundation according to claim 1, characterized in that: The sideline is 97.54 m long, the distance from home base to center field via second base is 121.92 m, the spacing between adjacent bases is 27.43 m, and the distance between the front center of the pitcher's plate and the tip of home base is 18.44 m.

4. The baseball field structure on a soft soil foundation according to claim 1, characterized in that: The height of the fence behind the home plate is 1.2m, and the height of the fence in other areas is 2.8m. A soft net is hung between the fence behind the home plate and the awning.

5. A method for constructing a baseball field on a soft soil foundation according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Use an excavator to level the soft soil foundation site and pre-dig a circular drainage ditch and a blind ditch; Step 2: Tie the site base and blind ditch steel bars. The steel bars are set in two directions in a single layer. After the steel bars are tied, concrete is poured to form a reinforced concrete base. Step 3: Lay gravel in the blind ditch, lay a layer of gravel along the central axis of the blind ditch toward the circular drainage ditch on both sides and perform slope finding; Step 4: bury the blind pipe on the gravel laid in the blind ditch. First, wrap the blind pipe with water holes with a circle of gauze, then place the blind pipe on the gravel with the water holes facing down, and then backfill the gravel around the blind pipe until the ditch mouth is flush; Step 5: Pave permeable asphalt. The permeable asphalt is spread by a paver and constructed in layers. The lower layer uses medium-grained permeable asphalt, and the upper layer uses fine-grained permeable asphalt. Step 6: Spread the high-performance water-permeable elastic pad. Mix the glue, black environmentally friendly rubber particles and quartz sand, spread it with a paver, flatten the joints, spread and compact it to form a buffer layer, and measure the flatness of the buffer layer. Step 7: Lay the artificial turf, spread the grass rolls parallel to the center line, glue the adjacent grass rolls with seam cloth, and then seal the edges of the venue.

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