Precast concrete piles and joints and production methods

Abstract

The present invention relates to a precast concrete pile and a joint and a production method, belonging to the technical field of precast concrete piles for buildings. It includes a concave joint and a convex joint arranged in relative matching manner, the concave joint includes a concave joint body with a groove, the outer end of the groove has a small opening, a concave joint end plate is arranged along the outer surface of the concave joint groove end, and the concave joint also includes a wedge-shaped clamping piece, which is set to a hollow truncated cone shape; the convex joint includes a convex joint body with a protrusion, a convex joint end plate is arranged along the outer surface of the protrusion end of the convex joint, and a fastener is arranged around the protrusion; the fastener and the protrusion are arranged in coordination with the wedge-shaped clamping piece; the wedge-shaped clamping piece is not connected to the concave joint end plate. The present invention effectively improves the shear resistance at the pile joint, reduces the operation procedures at the construction site, improves the construction speed, and makes it easy to ensure the construction quality; it achieves the effects of improving efficiency, shortening construction period, reducing pollution and protecting the ecological environment.

Description

Technical Field

[0001] The invention relates to a precast concrete pile, a joint and a production method, and belongs to the technical field of building precast concrete piles. Background Art

[0002] The precast concrete piles on the market now are hollow precast piles made of steel bars, concrete and other materials through processes such as making steel cages, making templates, putting steel cages into molds, pouring concrete, closing molds, tensioning steel bars, centrifugal vibration, pre-curing, demolding, steaming and curing, etc., which are suitable for pile foundation projects. The bearing capacity is determined by the concrete area in its cross section. The hollow cross section has a lower bearing capacity. For example, the vertical bearing capacity characteristic value corresponding to the pile body structure of PHC600B130 pipe pile is 3320KN, and its shear resistance design value is even lower, which is 396KN. It cannot be used in buildings higher than 100 meters. The pile foundation of buildings higher than 100 meters adopts cast-in-place piles. Cast-in-place piles have a long construction period, mud pollution in the construction process, and are prone to collapse, necking and other quality problems during the construction process. Therefore, a precast pile with higher bearing capacity is needed. Summary of the invention

[0003] The purpose of the present invention is to provide a precast concrete pile and joint and a production method, which effectively improves the shear resistance at the pile joint, reduces the operation procedures on the construction site, increases the construction speed, and makes it easy to ensure the construction quality; achieving the effects of improving efficiency, shortening construction period, reducing pollution and protecting the ecological environment.

[0004] The precast concrete pile joint described in the present invention comprises a concave joint and a convex joint arranged in a relatively matched manner. The concave joint comprises a concave joint body with a concave groove, the outer end of the groove has a small opening, a concave joint end plate is arranged along the outer surface of the concave groove end of the concave joint, and the concave joint also comprises a wedge-shaped clamping piece, which is set to be a hollow truncated cone shape; the convex joint comprises a convex joint body with a protrusion, a convex joint end plate is arranged along the outer surface of the protrusion end of the convex joint, and a fastener is arranged around the protrusion; the fastener and the protrusion are arranged in coordination with the wedge-shaped clamping piece; the wedge-shaped clamping piece is not connected to the concave joint end plate.

[0005] Further preferably, the inner cavity of the wedge-shaped clamping piece is cylindrical; the outer surface of one end of the wedge-shaped clamping piece close to the bottom surface of the groove has a larger diameter.

[0006] Further preferably, the height of the wedge-shaped clamping member is not greater than the height of the fastener.

[0007] Further preferably, an expansion groove is provided on the fastener.

[0008] Further preferably, the fastener comprises a plurality of fastening blocks arranged around the protrusion, and expansion gaps are left between adjacent fastening blocks.

[0009] Further preferably, the cross sections of the protrusion and the groove are arranged correspondingly; the cross sections of the protrusion and the groove are both square; or the cross sections of the protrusion and the groove are both circular.

[0010] The cross sections of the protrusion and the groove are arranged correspondingly, the cross section of the protrusion is square, and the cross section of the groove is square.

[0011] Alternatively, the cross-sections of the protrusion and the groove are arranged correspondingly, the cross-section of the protrusion is circular, and the cross-section of the groove is circular.

[0012] Further preferably, the fastener is connected to the male joint end plate by welding. For tensile piles, the fastener and the male joint end plate need to be connected by welding; for compression piles, the fastener and the male joint end plate do not need to be connected by welding.

[0013] Further preferably, the fastener, wedge-shaped clamping piece, male joint end plate and female joint end plate are all made of steel plates.

[0014] The production method of the precast concrete pile joint of the present invention comprises the following steps:

[0015] (A) Prefabricated end plates: respectively making convex joint end plates with protrusions and concave joint end plates with grooves, making fasteners, and making wedge-shaped clamping parts;

[0016] (B) Precast concrete piles: The concave joint end plate and the convex joint end plate are placed at both ends of the concrete pile, and the fasteners are welded to the convex joint end plate;

[0017] After the precast concrete pile joint is completed, the outer edge of the convex joint end plate is welded firmly and fully; the outer edge of the concave joint end plate is welded firmly and fully, which is used to enhance the tensile strength of the precast concrete pile joint.

[0018] The application method of the precast concrete pile joint of the present invention comprises the following steps: with the concave joint facing upward, a gelling caulking material is poured into the concave groove, a wedge-shaped clamping piece is placed into the concave groove, and a convex joint is inserted, and the pile pressing force during the construction process expands the protrusion and squeezes it into the concave groove, and at the same time, the gelling caulking material fills the gap at the joint tightly.

[0019] The production method of precast concrete piles of the present invention comprises the following steps:

[0020] (a) Prefabricated end plates: respectively making convex joint end plates with protrusions and concave joint end plates with grooves, making fasteners, and making wedge-shaped clamping parts;

[0021] (b) The steel cage is placed vertically in the steel formwork, the formwork is fixed, the steel bars are tensioned, and a pouring port is reserved at the top; after the precast pile is sunk, it is necessary to set the steel pipe in the steel cage and then form the formwork when grouting the pile bottom and side wall; the concave joint end plate and the convex joint end plate are placed at both ends of the concrete pile respectively, and the fasteners are welded to the convex joint end plate; the convex joint end plate is placed above the concrete pile;

[0022] (c) Hoist to the preparation station, fix the buckle at the bottom connection station, and fix it with a special clamp;

[0023] (d) Prepare dry hard concrete with high strength of grade C60 or above, pour it into the mold through the pouring port, vibrate it vigorously to make it dense, and seal the pouring port;

[0024] (e) Lay down the module and hoist it into the curing pool. The initial curing condition is 48-68℃ for 2-4 hours. De-mould the module.

[0025] (f) High temperature and high pressure steam curing to reach 100% strength, the steam curing temperature is 190-210℃, the steam curing time is 8-11 hours, and the precast concrete piles are obtained.

[0026] After the precast concrete pile is completed, the outer edge of the convex joint end plate is welded firmly and fully; the outer edge of the concave joint end plate is welded firmly and fully, so as to enhance the tensile strength of the precast concrete pile joint.

[0027] The precast concrete pile of the present invention comprises a pile body, a steel cage is arranged in the pile body, and the precast concrete pile joints are arranged at both ends of the pile body, a concave joint is arranged at one end of the pile body, and a convex joint is arranged at the other end of the pile body, and the concave joint and the convex joint are arranged in cooperation with each other.

[0028] Compared with the prior art, the precast concrete piles and joints and the production method of the present invention have the following beneficial effects:

[0029] The present invention adopts a socket connection method of a concave joint and a convex joint. The concrete pile is solid and is clamped by a wedge-shaped clamping piece, which effectively improves the shear resistance at the pile joint, significantly improves its shear resistance, reduces the operation procedures on the construction site, improves the construction speed, and makes it easy to ensure the construction quality. When used as a prefabricated pile joint, it improves efficiency, shortens the construction period, ensures quality, reduces pollution, and protects the ecological environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a structural schematic diagram of an embodiment of the precast concrete pile joint of the present invention,

[0031] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle joint in the engaged state.

[0032] Figure 3 yes Figure 1 One of the AA cross-sectional structure diagrams,

[0033] Figure 4 yes Figure 1 AA cross-sectional structure diagram (II)

[0034] Figure 5 yes Figure 1 AA cross-sectional structure diagram (3)

[0035] Figure 6 yes Figure 1 AA cross-sectional structure diagram 4,

[0036] Figure 7 yes Figure 1 AA cross-sectional structure diagram No. 5,

[0037] Figure 8 is a structural schematic diagram of embodiment 1 of the precast concrete pile according to the present invention,

[0038] Fig. 9 yes Figure 8 The schematic diagram of the plug-in connection of the concrete pile embodiment 1 is shown.

[0039] Fig.10 is a structural schematic diagram of embodiment 2 of the precast concrete pile according to the present invention,

[0040] Fig.11 yes Fig. 9 The schematic diagram of the plug-in connection of the concrete pile embodiment 2 is shown.

[0041] Fig.12 It is a schematic diagram of the top view of the vertical fixing device for precast concrete pile production according to the present invention,

[0042] Fig.13 It is a schematic diagram of the main structure of the vertical fixing device for precast concrete pile production according to the present invention,

[0043] Fig.14 yes Fig.13 Middle B view,

[0044] Fig.15 yes Fig.14 Structural diagram of the middle clamping lever in the open state.

[0045] Fig.16 yes Fig.15 Center C view.

[0046] In the figure: 1, convex joint 2, concave joint 3, pile body 4, first precast concrete pile 5, second precast concrete pile 6, base layer;

[0047] 1.1, male joint body 1.2, male joint end plate 1.3, fastener;

[0048] 1.31, fastening block 1.32, expansion slot;

[0049] 2.1, female joint body 2.2, wedge-shaped clamping piece 2.3, female joint end plate;

[0050] 3.1, concrete casting block 3.2, steel cage;

[0051] 7.1.1, Connecting plate A 7.1.2, Connecting plate B 7.1.3, Connecting plate C;

[0052] 7.2.1, Oil top A7.2.2, Oil top B7.2.3, Oil top C;

[0053] 7.3.1、Fixed crossbar A7.3.2、Fixed crossbar B7.3.3、Movable crossbar;

[0054] 7.4.1, column A7.4.2, support plate A7.4.3, support plate B7.4.4, column B;

[0055] 7.5. Base 7.5.1. Large diameter fixed base 7.5.2. Small diameter fixed base;

[0056] 7.6. Mould for producing precast concrete piles 7.7. Clamping and fixing structure; 7.8. Fixing seat; 7.7.1. Clamping and fixing seat 7.7.2. Clamping movable rod 7.7.3. Clamping cam 7.7.4. Bending clamping and fixing rod 7.7.5. Clamping groove 7.7.6. Clamping block 7.7.7.7. Clamping spring 7.7.8. Fixing groove. DETAILED DESCRIPTION

[0057] The technical solution in the embodiment of the present invention will be further clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention:

[0058] Example 1

[0059] like Figure 1 to Figure 3As shown, the precast concrete pile joint of the present invention comprises a concave joint 2 and a convex joint 1 arranged in a relatively matched manner, the concave joint 2 comprises a concave joint body 2.1 with a groove, the outer end of the groove has a small opening, a concave joint end plate 2.3 is arranged along the outer surface of the groove end of the concave joint 2, the concave joint 2 also comprises a wedge-shaped clamping piece 2.2, the wedge-shaped clamping piece is designed to be a hollow truncated cone; the convex joint 1 comprises a convex joint body 1.1 with a protrusion, a convex joint end plate 1.2 is arranged along the outer surface of the protrusion end of the convex joint 1, and a fastener 1.3 is arranged around the protrusion; the fastener 1.3 and the protrusion are matched with the wedge-shaped clamping piece 2.2; the wedge-shaped clamping piece 2.2 is not connected to the concave joint end plate 2.3. The inner cavity of the wedge-shaped clamping piece 2.2 is cylindrical; the outer surface of the end of the wedge-shaped clamping piece 2.2 close to the bottom surface of the groove has a larger diameter. As shown Figure 1 As shown, the inner side surface of the wedge-shaped clamping piece 2.2 is arranged perpendicular to the bottom end surface of the groove; the outer side surface of the wedge-shaped clamping piece is arranged to be inclined outward from top to bottom. The sum of the thickness of the fastener 1.3 and the thickness of the bottom end of the wedge-shaped clamping piece 2.2 is greater than the gap between the protrusion and the groove. The height of the wedge-shaped clamping piece 2.2 is not greater than the height of the fastener 1.3. An expansion groove 1.32 is provided on the fastener 1.3. The cross-sections of the protrusion and the groove are arranged correspondingly, and the cross-sections of the protrusion and the groove can both be circular, the cross-section of the protrusion is circular, and the cross-section of the groove is circular. The fastener 1.3 is connected to the male joint end plate 1.2 by welding. For tensile piles, the fastener and the male joint end plate need to be connected by welding; for compression piles, the fastener and the male joint end plate may not need to be welded. The materials of the fastener 1.3, the wedge-shaped clamping piece 2.2, the male joint end plate 1.2 and the female joint end plate 2.4 can all be steel plates.

[0060] The production method of the concrete joint of the present invention comprises the following steps:

[0061] (A) Prefabricated end plates: respectively manufacturing a convex joint end plate 1.2 with a protrusion and a concave joint end plate 2.3 with a groove, manufacturing a fastener 1.3, and manufacturing a wedge-shaped clamping member 2.2;

[0062] (B) Precast concrete pile: The concave joint end plate 2.3 and the convex joint end plate 1.2 are placed at both ends of the concrete pile respectively, and the fastener 1.3 is welded to the convex joint end plate 1.2; the convex joint end plate 1.2 is placed above the concrete pile;

[0063] After the precast concrete pile joint is completed, the outer edge of the convex joint end plate 1.2 is welded firmly and fully; the outer edge of the concave joint end plate 2.3 is welded firmly and fully, so as to enhance the tensile strength of the precast concrete pile joint.

[0064] The application method of the precast concrete pile joint of the present invention comprises the following steps: the concave joint 2 is facing upward, a cementitious caulking material is poured into the groove, a wedge-shaped clamping piece 2.2 is placed into the groove, and the convex joint 1 is inserted. The pile pressing force during the construction process expands the protrusion and squeezes it into the groove, and at the same time, the cementitious caulking material fills the gap at the joint tightly.

[0065] The production method of precast concrete piles of the present invention comprises the following steps:

[0066] (a) Prefabricated end plates: respectively manufacturing a convex joint end plate 1.2 with a protrusion and a concave joint end plate 2.3 with a groove, manufacturing a fastener 1.3, and manufacturing a wedge-shaped clamping member 2.2;

[0067] (b) The steel cage 3.2 is placed in the steel formwork, the formwork is fixed, the steel bars are tensioned, and a pouring port is reserved at the top; after the precast pile is sunk, it is necessary to set the steel pipe in the steel cage and then form the formwork when grouting the pile bottom and side wall; the female joint end plate 2.3 and the male joint end plate 1.2 are respectively placed at both ends of the concrete pile, and the fastener 1.3 is welded to the male joint end plate 1.2; the male joint end plate 1.2 is placed above the concrete pile;

[0068] (c) Hoist to the preparation station, fix the buckle at the bottom connection station, and fix it with a special clamp;

[0069] (d) Prepare high-strength C80 grade dry hard concrete, pour it into the mold through the pouring port, vibrate it vigorously to make it dense, and seal the pouring port;

[0070] (e) Lay down the module and hoist it into the curing pool. The initial curing condition is 48±5℃ for 3 hours. De-mould the module.

[0071] (f) Steam curing at high temperature and high pressure to achieve 100% strength, the curing temperature is 200±5℃, and the curing time is 10 hours to obtain precast concrete piles.

[0072] After the precast concrete pile is completed, the outer edge of the convex joint end plate 1.2 is welded firmly and fully; the outer edge of the concave joint end plate 2.3 is welded firmly and fully, so as to enhance the tensile strength of the precast concrete pile joint.

[0073] The outer edge of the convex joint end plate 1.2 is welded firmly and fully; the outer edge of the concave joint end plate 2.3 is welded firmly and fully; and the tensile strength of the concrete pile joint is enhanced.

[0074] When precast concrete piles are produced, the male joint is located at the top; when precast concrete piles are used, the male joint is located at the bottom and vertical casting is adopted.

[0075] like Figure 1 to Figure 3 as well as Figure 8-Figure 9As shown, the precast concrete pile described in the present invention includes a pile body 3, a steel cage 3.2 is arranged inside the pile body 3, and a concrete casting block 3.1 is wrapped around the outer periphery of the steel cage 3.2; a concave joint 2 is arranged at one end of the pile body 3, and a convex joint 1 is arranged at the other end of the pile body 3, and the concave joint 2 and the convex joint 1 are arranged in cooperation with each other.

[0076] When it is necessary to connect precast concrete piles, the application method of the precast concrete pile joint described in the present invention is used, which includes the following steps: the concave joint 2 is facing upward, a cementitious caulking material is poured into the groove, a wedge-shaped clamping piece 2.2 is placed in the groove, and the convex joint 1 is inserted. The pile pressing force during the construction process will expand the protrusion and squeeze it into the groove. At the same time, the cementitious caulking material will fill the gap at the joint tightly.

[0077] Precast concrete pile plug-in:

[0078] The first precast concrete pile 4 and the second precast concrete pile 5 are placed sequentially from top to bottom, one end of the convex joint of the second precast concrete pile is arranged on the base layer 6, the convex joint of the first precast concrete pile is butted against the concave joint of the second precast concrete pile, the concave joint of the second precast concrete pile faces upward, the wedge-shaped clamping piece is arranged in the groove of the concave joint, a cementitious caulking material is poured into the groove, the wedge-shaped clamping piece is placed in the concave joint of the second precast concrete pile, pressure is applied to the first precast concrete pile 4 from the concave joint at the top of the first precast concrete pile 4, the pile pressing force during the construction process will expand the protrusion and squeeze it into the groove, and at the same time the cementitious caulking material will fill the gap at the joint tightly, and the convex joint of the first precast concrete pile and the concave joint of the second precast concrete pile will cooperate with each other and be well connected.

[0079] The precast concrete piles are prestressed concrete piles. Comparison between prestressed concrete piles and prestressed concrete pipe piles:

[0080] 1. The bearing capacity characteristic value of a 600mm diameter prestressed concrete pile is about 4885KN; the vertical bearing capacity characteristic value of the PHC600B130 prestressed concrete pipe pile is 3320KN.

[0081] 2. The characteristic value of the bearing capacity of a prestressed concrete pile with a diameter of 800 mm is about 8684 KN; the corresponding vertical bearing capacity characteristic value of the pile structure of the prestressed concrete pipe pile PHC800B130 is 4730 KN.

[0082] Prestressed concrete pipe piles are hollow piles.

[0083] Prestressed concrete piles can be prestressed concrete round piles. The construction speed of prestressed concrete round piles is compared with that of cast-in-place piles:

[0084] (1) Prestressed concrete round piles are constructed using a static press, with a pile pressure of 800 meters per 24 hours; cast-in-place piles are constructed using a rotary drill, with a pile pressure of 200 meters per 24 hours;

[0085] (2) Prestressed concrete round piles can be tested 7-15 days after the static press is completed, while cast-in-place piles can only be tested 28 days after the construction is completed.

[0086] The production method of precast concrete piles described in the present invention, the special clamp is a vertical fixing device for the production of precast concrete piles.

[0087] like Figure 12 to Figure 16 As shown, the vertical fixing device for precast concrete pile production described in the present invention includes three cross bars connected in sequence, one of which is a movable cross bar 7.3.3, and the other two cross bars are fixed cross bars, the fixed cross bars include a fixed cross bar A7.3.1 and a fixed cross bar B7.3.2, the fixed cross bar A7.3.1 and the fixed cross bar B7.3.2 are connected by a connecting plate B7.1.2; the other end of the fixed cross bar A7.3.1 is connected to the connecting plate A7.1.1; the other end of the fixed cross bar B7.3.2 is connected to the connecting plate C7.1.3; a column A7.4.1 is provided on one side of the fixed cross bar A7.3.1, and the column A7.4.1 and the fixed cross bar A7.3.1 are connected by a supporting plate A7.4.2; a column B7.4.4 is provided on one side of the fixed cross bar B7.3.2, and the column B7.4.4 and the fixed cross bar B7.3.2 are connected by a supporting plate B7.4.3. The column A, the support plate A, the column B and the support plate B are all located outside the triangle formed by the three cross bars.

[0088] The connecting plate A7.1.1 is provided with an oil top A7.2.1; the connecting plate B7.1.2 is provided with an oil top B7.2.2; the connecting plate C7.1.3 is provided with an oil top C7.2.3; the oil tops A, B and C are all located inside the triangle formed by the three crossbars. The oil top is a conventional technology in this field and will not be described in detail.

[0089] The first end of the movable cross bar 7.3.3 is hinged to the fixing seat 7.8 on the connecting plate C7.1.3, and the second end of the movable cross bar 7.3.3 is connected to the connecting plate A7.1.1 through the clamping fixing structure 7.7;

[0090] The clamping and fixing structure 7.7 includes a bent clamping and fixing rod 7.7.4, the first end of which is fixedly connected to the connecting plate A7.1.1, and the second end of the bent clamping and fixing rod 7.7.4 is provided with an L-shaped clamping groove 7.7.5 from the middle; and also includes a clamping and fixing seat 7.7.1, the clamping and fixing seat 7.7.1 is fixedly connected to the connecting plate A7.1.1, the clamping and fixing seat 7.7.1 is arranged above the bent clamping and fixing rod 7.7.4, and the clamping and fixing seat 7.7.1 is hinged to the clamping movable rod 7.7.2, A clamping protrusion 7.7.3 is provided on the other end of the clamping movable rod 7.7.2, close to the side of the bent clamping fixed rod 7.7.4, and the clamping protrusion 7.7.3 is arranged in cooperation with the clamping groove 7.7.5; it also includes a clamping block 7.7.6, and an inclined surface is provided on the upper side of the first end of the clamping block 7.7.6, and a rectangular clamping groove is provided below the first end of the clamping block 7.7.6, and a clamping spring 7.7.7 is provided at the second end of the clamping block 7.7.6, and a fixing groove 7.7.8 is provided on the fixing column, and the clamping spring 7.7.7 is arranged in the fixing groove 7.7.8.

[0091] When the clamping spring 7.7.7 is in a zero-stress state, the second end of the clamping block 7.7.6 is located in the fixing groove 7.7.8.

[0092] like Figure 12-13 As shown, the base 7.5 is also included. At least two step holes are provided in the base 7.5, and each step hole serves as a fixed base. The fixed base includes a large-diameter fixed base 7.5.1 and a small-diameter fixed base 7.5.2, which are used to adapt to molds of different diameters. The base 7.5 is usually a cement base, and the large-diameter fixed base 7.5.1 and the small-diameter fixed base 7.5.2 are also made of cement.

[0093] The working process or working principle of the vertical fixing device for precast concrete pile production is as follows:

[0094] 1. Lifting and vertical placement of the mold for producing precast concrete piles: The mold for producing precast concrete piles is an existing conventional technology and will not be described in detail. Open the clamping movable rod and push the movable cross bar upward; hoist the mold for producing precast concrete piles 7.6 with the lifting equipment. First, place the bottom end of the mold for producing precast concrete piles into the large-diameter fixed base or the small-diameter fixed base. Then, the lifting equipment lifts the top of the mold, keeping the mold in a vertical position. Open the clamping movable rod and push the movable cross bar. The movable cross bar squeezes the clamping block downward along the inclined surface. The clamping block shrinks into the fixed groove. The movable cross bar continues to move downward until the movable cross bar contacts the bent clamping fixed rod. The clamping groove at the bottom of the clamping block clamps the movable cross bar. Push the clamping movable rod. The clamping convex and the clamping groove cooperate to clamp. The clamping block, the clamping movable rod and the bent clamping fixed rod cooperate to fix the movable cross bar. The oil top extends out and clamps and fixes the mold for producing precast concrete piles.

[0095] 2. Pour concrete from the opening above the mold.

[0096] 3. After the concrete solidifies, open the clamping movable rod and push the movable cross bar upwards; use the hoisting equipment to lift the mold used to produce precast concrete piles, lay the mold flat to the side of the movable cross bar, and take the mold.

[0097] Example 2

[0098] like Figure 4 As shown, in the precast concrete pile joint, the wedge-shaped clamping member is inserted into one end of the convex joint, and the fastener 1.3 includes a plurality of fastening blocks 1.31 arranged around the protrusion, and expansion gaps are left between adjacent fastening blocks 1.31.

[0099] The production method of the precast concrete piles comprises: (4) preparing high-strength C75 grade dry hard concrete, pouring it into the mold assembly through the pouring port, vibrating it vigorously to make it dense, and sealing the pouring port;

[0100] (5) Lay down the module assembly and hoist it into the curing pool. The initial curing condition is 55±5℃ for 4 hours. De-mould the module assembly.

[0101] (6) High temperature and high pressure steam curing to achieve 100% strength, the steam curing temperature is 210±5℃, the steam curing time is 8 hours, and the precast concrete piles are obtained.

[0102] like Figure 4 as well as Figure 10-11 As shown, the precast concrete pile described in the present invention includes a pile body 3, a steel cage 3.2 is arranged inside the pile body 3, and a concrete casting block 3.1 is wrapped around the outer periphery of the steel cage 3.2; a concave joint 2 is arranged at one end of the pile body 3, and a convex joint 1 is arranged at the other end of the pile body 3, and the concave joint 2 and the convex joint 1 are arranged in cooperation with each other.

[0103] Precast concrete pile plug-in:

[0104] The first precast concrete pile and the second precast concrete pile are placed sequentially from top to bottom, one end of the male joint of the second precast concrete pile is arranged on the base layer 6, the male joint of the first precast concrete pile is butted against the female joint of the second precast concrete pile, a wedge-shaped clamp is arranged below the male joint, and the wedge-shaped clamp can be appropriately inserted between the protrusion of the male joint and the fastener. A cementitious caulking material is poured into the groove, the wedge-shaped clamp is placed in the second precast concrete female joint, and pressure is applied to the first precast concrete pile from the female joint at the top of the first precast concrete pile. The pile pressing force during the construction process expands the protrusion and squeezes it into the groove. At the same time, the cementitious caulking material fills the gap at the joint tightly, and the male joint of the first precast concrete pile and the female joint of the second precast concrete pile are well connected with each other.

[0105] The rest is the same as in Example 1.

[0106] Example 3

[0107] like Figure 5 As shown, in the precast concrete pile joint, the cross sections of the protrusion and the groove are arranged correspondingly, and the cross sections of the protrusion and the groove are both square. The fastener 1.3 includes a plurality of fastening blocks 1.31 arranged around the protrusion, and expansion gaps are left between adjacent fastening blocks 1.31.

[0108] The production method of precast concrete piles comprises: (4) preparing high-strength C60 grade dry hard concrete, pouring it into the mold assembly through the pouring port, vibrating it vigorously to make it dense, and sealing the pouring port;

[0109] (5) Lay down the module and hoist it into the curing pool. The initial curing condition is 60±5℃ for 3.5 hours. De-mould the module.

[0110] (6) High temperature and high pressure steam curing to achieve 100% strength, the steam curing temperature is 195±5℃, the steam curing time is 9.5 hours, and the precast concrete piles are obtained.

[0111] The precast concrete piles have precast concrete pile joints at both ends.

[0112] The rest is the same as in Example 1.

[0113] Example 4

[0114] like Figure 6 As shown, the cross-sections of the protrusion and the groove of the precast concrete pile joint are arranged correspondingly, and the cross-sections of the protrusion and the groove are both square. The fastener 1.3 includes four fastening blocks 1.31 arranged around the protrusion, and expansion gaps are left between adjacent fastening blocks 1.31. The fastening blocks 1.31 are provided with expansion grooves 1.32.

[0115] The production method of the precast concrete piles comprises: (4) preparing high-strength C65 grade dry hard concrete, pouring it into the mold assembly through the pouring port, vibrating it vigorously to make it dense, and sealing the pouring port;

[0116] (5) Lay down the module assembly and hoist it into the curing pool. The initial curing condition is 68±5℃ for 3 hours. De-mould the module assembly.

[0117] (6) High temperature and high pressure steam curing to achieve 100% strength, the steam curing temperature is 190±5℃, the steam curing time is 11 hours, and the precast concrete piles are obtained.

[0118] The precast concrete pile has the precast concrete pile joints at both ends. The rest is the same as in Example 1.

[0119] Example 5

[0120] like Figure 7As shown, the cross-sections of the protrusion and the groove of the precast concrete pile joint are both square. The fastener 1.3 includes four fastening blocks 1.31 arranged around the protrusion, and expansion gaps are left between adjacent fastening blocks 1.31.

[0121] The production method of the precast concrete piles comprises: (4) preparing high-strength C70 grade dry hard concrete, pouring it into the mold assembly through the pouring port, vibrating it vigorously to make it dense, and sealing the pouring port;

[0122] (5) Lay down the module and hoist it into the curing pool. The initial curing condition is 65±5℃ for 2 hours. De-mould the module.

[0123] (6) High temperature and high pressure steam curing to 100% strength, the steam curing temperature is 205±5℃, the steam curing time is 10.5 hours, and the precast concrete pile is obtained. The precast concrete pile has the precast concrete pile joints at both ends.

[0124] The rest is the same as in Example 1.

[0125] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A method for producing a precast concrete pile with a precast concrete pile joint, characterized in that: The following steps are involved: (a) Prefabricated end plates: respectively manufacturing a convex joint end plate (1.2) with a protrusion and a concave joint end plate (2.3) with a groove, manufacturing a fastener (1.3), and manufacturing a wedge-shaped clamping member (2.2); (b) The steel cage is placed vertically in the steel formwork, the formwork is fixed, the steel bars are tensioned, and a pouring port is reserved at the top; after the precast pile is sunk, it is necessary to set the steel pipe in the steel cage and then form the formwork when grouting the pile bottom and side wall; the concave joint end plate (2.3) and the convex joint end plate (1.2) are respectively placed at both ends of the concrete pile, and the fastener (1.3) is welded to the convex joint end plate (1.2); the convex joint end plate (1.2) is placed above the concrete pile; (c) Hoist to the preparation station, fix the buckle at the bottom connection station, and fix it with a special clamp; The special fixture is a vertical fixing device for the production of precast concrete piles; The vertical fixing device for precast concrete pile production of the present invention comprises three cross bars connected in sequence, one of which is a movable cross bar (7.3.3), and the other two cross bars are fixed cross bars, wherein the fixed cross bars comprise a fixed cross bar A (7.3.1) and a fixed cross bar B (7.3.2), wherein the fixed cross bar A (7.3.1) and the fixed cross bar B (7.3.2) are connected via a connecting plate B (7.1.2); the other end of the fixed cross bar A (7.3.1) is connected to the connecting plate A (7.1.1); the other end of the fixed cross bar B (7.3.2) is connected to the connecting plate One end is connected to the connecting plate C (7.1.3); a column A (7.4.1) is provided on one side of the fixed crossbar A (7.3.1), and the column A (7.4.1) and the fixed crossbar A7.3.1 are connected by a support plate A (7.4.2); a column B (7.4.4) is provided on one side of the fixed crossbar B (7.3.2), and the column B (7.4.4) and the fixed crossbar B (7.3.2) are connected by a support plate B (7.4.3); the column A, support plate A, column B and support plate B are all located outside the triangle surrounded by the three crossbars; (d) Prepare dry hard concrete with high strength of grade C60 or above, pour it into the mold through the pouring port, vibrate it vigorously to make it dense, and seal the pouring port; (e) Lay down the module and hoist it into the curing pool. The initial curing condition is 48-68℃ for 2-4 hours. De-mould the module. (f) high temperature and high pressure steam curing to 100% strength, the curing temperature is 190-210°C, the curing time is 8-11 hours, and the precast concrete pile is obtained; The precast concrete pile joint comprises a concave joint (2) and a convex joint (1) arranged in a relatively matched manner, the concave joint (2) comprising a concave joint body (2.1) with a concave groove, the outer end of the concave groove having a small opening, a concave joint end plate (2.3) being arranged along the outer surface of the concave groove end of the concave joint (2), and the concave joint (2) further comprising a wedge-shaped clamping piece (2.2), the wedge-shaped clamping piece being arranged in a hollow truncated cone shape; The male joint (1) comprises a male joint body (1.1) having a protrusion, a male joint end plate (1.2) being arranged along the outer surface of the protrusion end of the male joint (1), and a fastener (1.3) being arranged around the protrusion; The fastener (1.3) and the protrusion are arranged in cooperation with the wedge-shaped clamping piece (2.2); The wedge-shaped clamping piece (2.2) is not connected to the concave joint end plate (2.3); The inner cavity of the wedge-shaped clamping piece (2.2) is cylindrical; the outer surface of one end of the wedge-shaped clamping piece (2.2) close to the bottom surface of the groove has a larger diameter; The height of the wedge-shaped clamping member (2.2) is not greater than the height of the fastening member (1.3); An expansion groove (1.32) is provided on the fastener (1.3); or: the fastener (1.3) comprises a plurality of fastening blocks (1.31) arranged around the protrusion, and expansion gaps are left between adjacent fastening blocks (1.31).

2. The method for producing a precast concrete pile with a precast concrete pile joint according to claim 1, characterized in that: The cross sections of the protrusion and the groove are arranged correspondingly; the cross sections of the protrusion and the groove are both square; or the cross sections of the protrusion and the groove are both circular.

3. The method for producing a precast concrete pile with a precast concrete pile joint according to any one of claims 1 to 2, characterized in that: The following steps are included: The joint (2) is facing upwards, and the gelling caulking material is poured into the groove. The wedge-shaped clamping piece (2.2) is placed into the groove, and the convex joint (1) is inserted. The pile pressing force during the construction process will expand the convexity and squeeze it into the groove. At the same time, the gelling caulking material will fill the gap at the joint tightly.

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