Construction method of supporting pile-pile inter-slab structure

Abstract

A method for constructing a supporting pile inter-pile plate structure: before pouring concrete of a supporting pile (1), a foam board (4) is used to block a horizontal ring reinforcement groove (6); after the supporting pile (1) concrete construction is completed, a foundation pit is excavated in layers and sections, the foam board (4) in the reserved groove of the adjacent pile body is removed, and an inter-pile plate (2) is inserted; after the lower earthwork is excavated, the inter-pile plate (2) is inserted and connected with the previous inter-pile plate (2); the inter-pile plate (2) is pushed and squeezed downward, and this cycle is repeated until the construction of the inter-pile plate (2) is completed; finally, waterproof cement mortar is injected into the joint of the supporting pile (1) and the inter-pile plate (2) and the joint of the upper and lower inter-pile plates (2). The method for constructing a supporting pile inter-pile plate structure reduces construction wet work, improves work efficiency, shortens construction period, and has simple construction steps.

Description

Technical Field

[0001] The invention belongs to the technical field of building foundation pit support, and in particular relates to a construction method of a supporting pile inter-pile plate structure. Background Art

[0002] In recent years, with the continuous progress of society, my country's infrastructure field has developed rapidly, and more and more new processes and technologies have been widely used in practice. Under high slopes of road cuttings, foundation pit excavation, and unstable geological conditions, the construction technology using support piles and pile plates as protective measures has been widely used in engineering.

[0003] The utility model patent with announcement number CN203782682 U (announcement date is May 4, 2018) discloses a pile-board wall retaining structure. When the excavated slope is supported by a pile-board wall, a guide groove assembled pile plate device is used, including a retaining plate and a plurality of pile bodies arranged in the slope soil body. The pile bodies are arranged alternately, and the upper ends of the pile bodies extend upward to form a pile body extending out of the slope soil body. A guide groove is provided in the side wall of the pile body, and the two sides of the retaining plate are respectively inserted in the guide grooves of two adjacent pile bodies. The construction steps are as follows: Step 1: Dig the pile hole from top to bottom; Step 2: Process the pile body steel cage, weld the channel steel to both sides of the pile body steel cage, and hoist it into the pile hole; Step 3: Cast the reinforced concrete pile body and construct the pile body; Step 4: Prefabricate the reinforced concrete retaining plate, and reserve square holes as drainage holes; Step 5: Excavate the soil in front of the pile to the designed elevation; Step 6: Excavate the retaining wall concrete between the guide groove and the pile body retaining wall layer; Step 7: Hoist and install the prefabricated retaining plate from top to bottom along the guide groove. The guide groove assembled pile plate device has less impact on the slope because the retaining plate is directly installed along the guide groove, and there is no need to excavate the soil on the retaining side; and the retaining plate can be hoisted and assembled from top to bottom along the guide groove, which is convenient for construction; compared with the cast-in-place reinforced concrete plate, the construction of the retaining plate can be separated from the construction of the pile body and carried out simultaneously, which shortens the construction period.

[0004] However, the construction process of the above-mentioned supporting pile inter-pile plate is relatively complicated, especially the excavation of the retaining wall concrete between the guide groove and the pile body retaining wall layer is relatively difficult, and the excavation process is very likely to damage the supporting pile body, affecting the overall strength of the supporting structure; in addition, the guide groove is long and prone to deformation, and it is difficult to install the retaining plate into the slot; and the overall strength of the retaining plate fixed only by the guide groove is poor. It can be seen that the existing construction process of the supporting pile inter-pile plate structure still has shortcomings and needs to be further improved.

[0005] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the existing supporting pile inter-pile plate structure has poor overall strength, the supporting pile body is easily damaged, the connection and installation of the inter-pile plate and the supporting pile is difficult, the construction process is cumbersome, and the construction period is long.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A construction method of a supporting pile-pile slab structure, wherein the supporting pile-pile slab structure comprises:

[0009] The supporting piles are cast-in-place reinforced concrete supporting structures, which are foundation pit supporting structures;

[0010] The pile inter-plate is a prefabricated component, which is assembled with the support piles into an integral structure for supporting soil retaining and waterproofing;

[0011] The crown beam is a reinforced concrete continuous beam arranged on the top of the supporting piles, and a hole is reserved at the top for inserting the pile inter-plate into the supporting piles.

[0012] The supporting pile is provided with a supporting pile groove, which is a concave groove arranged on the side of the pile body of the supporting pile and is used to fill the foam board and fix the prefabricated pile inter-plate.

[0013] The reinforcement cage of the support pile is provided with a horizontal ring reinforcement groove, wherein the horizontal ring reinforcement groove is a concave groove formed at the end of the horizontal ring reinforcement that is tied and fixed to the longitudinal reinforcement of the reinforcement cage.

[0014] The foam board is used to fill the horizontal ring reinforcement groove before the support pile concrete is poured; when the foundation pit is excavated in layers and sections, the foam board is removed from the horizontal ring reinforcement groove to form the support pile groove. The foam board can be an ordinary foam board.

[0015] The left and right ends of the pile inter-plate are fixed in the groove of the supporting pile; the upper and lower pile inter-plates are squeezed at the concave and convex joints to form a bite state.

[0016] The construction method of the supporting pile-pile slab structure includes the following steps:

[0017] Before pouring concrete of the supporting pile, the ends of the horizontal ring reinforcements of the supporting pile reinforcement cage are used as grooves to form horizontal ring reinforcement grooves, and the reinforcement cage is placed below;

[0018] Use foam board to plug the groove of horizontal ring reinforcement and pour concrete;

[0019] After the construction of the supporting pile concrete and the crown beam is completed, the supporting pile anchor cables are constructed;

[0020] Excavate the foundation pit in layers and sections, remove the foam board in the groove of the horizontal ring reinforcement reserved in the pile bodies of two adjacent piles, and after cleaning, insert the first inter-pile board from the reserved hole on the top of the crown beam using a lifting device, and fix it with temporary support rods after insertion;

[0021] Continue to excavate the lower soil layer. After the excavation is completed, insert the second pile plate to connect with the first pile plate, adjust the temporary support rod according to the insertion depth, and push and squeeze the pile plate downward at the same time;

[0022] This cycle is repeated until the construction of the pile panels is completed. Then, the lining, trowel and non-shrinkage high-strength fiber mortar are used for edge sealing. A grouting machine is used to inject high-strength waterproof cement mortar from the grouting holes into the junction of the supporting piles and the prefabricated pile panels and the junction of the upper and lower pile panels. When the waterproof cement mortar flows out from the slurry holes of the pile panels and the reserved holes in the crown beams, the holes are sealed in time.

[0023] According to the construction method of the supporting pile-pile plate structure of the present invention, waterproof cement mortar is used to fill the caulking joints at the concave and convex joints of the pile plates; the caulking joints at the concave and convex joints adopt high-strength waterproof cement mortar with a grade of M30 and a water-cement ratio of preferably 0.4 to 0.45.

[0024] According to the method for constructing the supporting pile inter-pile plate structure of the present invention, the anchor cable obliquely penetrates the supporting pile body and is fixed in the soil layer, and forms an angle with the horizontal plane.

[0025] The top surface of the pile plate is provided with a pile plate tenon; the bottom surface of the pile plate is provided with a pile plate groove; the pile plate groove between the upper and lower adjacent pile plates and the pile plate tenon form a bite form.

[0026] The pile plate is provided with a pile plate lifting point, which is a U-shaped clamp pre-buried in the pile plate and is used for lifting the fixing point on the pile plate by the lifting equipment.

[0027] According to the construction method of the supporting pile-pile slab structure of the present invention, temporary support rods are used to temporarily support the slab between the piles; the supporting pile-pile slab structure is provided with temporary support points, which are used to fix the temporary support rods.

[0028] The pile plates are provided with grouting holes and grouting holes, which can connect the grooves, tenons and holes of the pile plates; after the waterproof cement mortar enters the connecting cavity from the grouting holes of the next pile plate, the waterproof cement mortar flows upward into the tenons and grooves of the pile plates under pressure until the slurry flows out from the grouting holes of the previous pile plate and blocks the holes.

[0029] The inter-pile plate is also provided with exhaust holes for exhausting various gases generated by the waterproof cement mortar during thermal expansion and contraction.

[0030] According to the construction method of the supporting pile inter-pile plate structure of the present invention, the anchor cable is tensioned and locked as a whole by using a steel strand bundle; the angle formed by the anchor cable and the horizontal plane is 20 degrees.

[0031] According to the construction method of the supporting pile inter-pile slab structure of the present invention, the angle formed by the temporary supporting rod and the horizontal plane is 45 degrees.

[0032] According to the construction method of the supporting pile inter-pile plate structure of the present invention, the horizontal ring reinforcement is The horizontal ring reinforcement groove has a groove depth of 150mm and a width of 120mm.

[0033] According to the construction method of the supporting pile inter-pile plate structure of the present invention, the size of the prefabricated inter-pile plate is 2000×1200×100mm (height×width×thickness), the mesh reinforcement is double-layer bidirectional HPB300A10@200×200mm, and the thickness of the mesh reinforcement protective layer is 50mm.

[0034] According to the construction method of the supporting pile inter-pile plate structure of the present invention, the supporting pile groove is a concave groove structure provided on the pile body, and the groove has a depth of 100 mm and a width of 120 mm.

[0035] According to the construction method of the supporting pile inter-pile plate structure of the present invention, the groove depth of the inter-pile plate groove is 100 mm and the groove width is 80 mm.

[0036] According to the construction method of the supporting pile inter-pile plate structure of the present invention, the height of the mortise and tenon of the inter-pile plate is 100 mm and the width of the tenon is 60 mm.

[0037] According to the construction method of the supporting pile plate structure of the present invention, the lifting point of the pile plate is set in the middle of the pile plate, and a U-shaped clamping ring is pre-buried in the front and back of the pile plate. The specification of the clamping ring is Ф20 round steel. After the pile plate is assembled, it is cut and the holes are sealed with waterproof cement mortar.

[0038] According to the construction method of the supporting pile-pile plate structure of the present invention, the temporary supporting rod is a Ф48.3×3.6mm steel pipe, the bottom of which is supported on the ground and forms an angle of 45 degrees with the pile plate.

[0039] According to the construction method of the supporting pile inter-pile plate structure of the present invention, the temporary support point is only set at 2 / 3 of the height of the inter-pile plate.

[0040] According to the supporting pile plate structure of the present invention, the grouting hole is a circular hole with a diameter of 40 mm, and is connected to the tenon and groove of the pile plate.

[0041] According to the construction method of the supporting pile inter-pile plate structure of the present invention, the slurry outlet hole is a circular hole with a diameter of 40 mm, and is connected to the inter-pile plate tenon and the inter-pile plate groove.

[0042] According to the construction method of the supporting pile plate structure of the present invention, the exhaust holes are arranged at the four corners of the plate between the piles, which are circular holes with a diameter of 20 mm and are connected to the tenons and grooves of the plate between the piles.

[0043] The construction method of the supporting pile inter-pile plate structure provided by the present invention has the following beneficial effects:

[0044] The pile slab is a prefabricated component, which reduces the wet work on site and shortens the construction period;

[0045] The forming method of the supporting pile groove is simple, the construction is convenient, the foam board is easy to remove, and it will not damage the supporting pile body and will not reduce the strength of the supporting pile;

[0046] The upper and lower pile plates are squeezed to form a bite state at the concave and convex joints, which improves the overall stability of the pile plate connection;

[0047] Through the high-strength waterproof cement mortar caulking and fixed connection, the lateral pressure bearing capacity and waterproof performance of the supporting pile slab are improved, ensuring the stability and safety of the supporting pile slab structure as a retaining structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0049] Figure 1 A schematic elevation view of a supporting pile inter-pile plate structure provided in an embodiment of the present invention.

[0050] Figure 2 A support pile inter-pile plate structure provided by an embodiment of the present invention is provided along Figure 1 Schematic diagram of the cross section along line 1-1.

[0051] Figure 3 A schematic plan view of a supporting pile inter-pile plate structure provided in an embodiment of the present invention.

[0052] Figure 4 An enlarged schematic diagram of a supporting pile node of a supporting pile-pile plate structure provided in an embodiment of the present invention.

[0053] Figure 5 An enlarged schematic diagram of a reinforcement cage of a support pile-pile plate structure provided in an embodiment of the present invention.

[0054] Figure 6 An enlarged schematic diagram of a pile-plate node of a supporting pile-plate structure provided in an embodiment of the present invention.

[0055] The accompanying drawings are marked as follows:

[0056] 1-support piles, 2-pile plates, 3-support pile grooves, 4-foam plates, 5-waterproof cement mortar, 6-horizontal ring reinforcement grooves, 7-pile plate tenons, 8-pile plate grooves, 9-pile plate lifting points, 10-temporary support rods, 11-temporary support points, 12-grouting holes, 13-grouting holes, 14-exhaust holes, 15-anchor cables, 16-crown beams. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and examples. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0058] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0059] In the description of the present invention, it is necessary to understand that the terms "groove", "tenon", "size", "length", "width", "thickness", "up", "down", "extrusion", "fillet", "left", "right", "vertical", "horizontal", "top", "bottom", "front", "back" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0060] Furthermore, the term "occlusion" is used only to describe the relative position and cannot be understood as indicating or implying the relative importance or implicitly indicating the closure of the upper and lower jaws of the indicated technical feature. Thus, the feature defined as "occlusion" can explicitly or implicitly include the relative position of the upper and lower grooves and tongues.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "caulking" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "the next level" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0063] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0064] See also Figure 1-6 As shown, in one embodiment, a supporting pile-pile plate structure includes:

[0065] The supporting pile 1 is a foundation pit supporting structure; the supporting pile 1 is a cast-in-place reinforced concrete supporting structure;

[0066] The pile inter-plate 2 is a prefabricated component, which is assembled with the supporting piles into an integral structure for supporting soil retaining and waterproofing;

[0067] The crown beam 16 is a reinforced concrete continuous beam arranged on the top of the supporting pile 1, and a hole is reserved on the top of the crown beam 16 for inserting the pile plate 2 into the supporting pile 1.

[0068] The supporting pile 1 is provided with a supporting pile groove 3 , which is a concave groove provided on the side of the pile body of the supporting pile 1 and is used to fill the foam board 4 and fix the prefabricated inter-pile plate 2 .

[0069] The reinforcement cage of the support pile 1 is provided with a horizontal ring reinforcement groove 6, and the horizontal ring reinforcement groove 6 is a concave groove formed at the end of the horizontal ring reinforcement tied and fixed on the longitudinal reinforcement of the reinforcement cage.

[0070] The foam board 4 is used to fill the horizontal ring reinforcement groove 6 before pouring the supporting pile concrete; when the foundation pit is excavated in layers and sections, the foam board 4 is removed from the horizontal ring reinforcement groove 6 to form the supporting pile groove 3.

[0071] The left and right ends of the pile inter-plate 2 are fixed in the supporting pile groove 3; the upper and lower pile inter-plates 2 are squeezed at the concave and convex joints to form a bite state.

[0072] The construction method of the supporting pile-pile plate structure comprises the following steps:

[0073] Before pouring concrete on the support pile 1, the ends of the horizontal ring reinforcements of the reinforcement cage of the support pile 1 are used as grooves to form horizontal ring reinforcement grooves 6, and the reinforcement cage is placed below;

[0074] Use ordinary foam board 4 to block the horizontal ring reinforcement groove 6 and pour concrete;

[0075] After the construction of the support pile 1 concrete and the crown beam is completed, the support pile anchor cable 15 is constructed;

[0076] Excavate the foundation pit in layers and sections, remove the foam board 4 in the horizontal ring reinforcement groove 6 reserved for the two adjacent piles, and after cleaning, insert the first inter-pile board from the reserved hole on the top of the crown beam 16 using a lifting device, and fix it with a temporary support rod 10 after insertion;

[0077] Continue to excavate the lower soil layer. After the excavation is completed, insert the second pile plate to connect with the first pile plate, adjust the temporary support rod 10 according to the insertion depth, and push and squeeze the pile plate downward.

[0078] See also Figure 1 , and this cycle is carried out. After the construction of all the pile panels is completed, the lining, trowel, and non-shrinkage high-strength fiber mortar are used for edge sealing, and the high-strength waterproof cement mortar 5 is injected from the grouting hole 12 into the junction of the supporting pile 1 and the prefabricated pile panel 2 and the junction of the upper and lower pile panels 2 by a grouting machine. When the waterproof cement mortar 5 slurry flows out from the slurry outlet hole 13 of the pile panel 2 and the reserved holes of the crown beam 16, the holes are sealed in time.

[0079] The waterproof cement mortar 5 is used to fill the caulking joints at the concave and convex joints of the inter-pile plates 2.

[0080] The anchor cable 15 obliquely penetrates the pile body of the supporting pile 1 and is fixed in the soil layer, and forms an angle with the horizontal plane.

[0081] The top surface of the pile plate 2 is provided with a pile plate tenon 7; the bottom surface of the pile plate 2 is provided with a pile plate groove 8; the pile plate groove 8 between the upper and lower adjacent pile plates 2 and the pile plate tenon 7 form a bite form.

[0082] The pile plate 2 is provided with a pile plate lifting point 9, which is a U-shaped clamp pre-buried in the pile plate and is used for the lifting equipment to lift the fixed point on the pile plate.

[0083] The temporary supporting rod 10 is used for temporarily supporting the inter-pile slab 2 .

[0084] The supporting pile-pile plate structure is provided with temporary support points 11 for fixing temporary support rods 10 .

[0085] The pile plate 2 is provided with a grouting hole 12 and a grouting hole 13, which can connect the pile plate groove 8, the pile plate tenon 7 and the hole; after the waterproof cement mortar 5 enters the connecting cavity from the grouting hole 12 of the next pile plate 2, the waterproof cement mortar 5 flows upward into the pile plate tenon 7 and the pile plate groove 8 under the action of pressure until the slurry flows out from the grouting hole 13 of the previous pile plate 2 and blocks the hole.

[0086] The inter-pile plate 2 is also provided with exhaust holes 14 for exhausting various gases generated by the waterproof cement mortar 5 when it expands and contracts due to heat and cold.

[0087] In a preferred embodiment of the method for constructing the supporting pile inter-pile plate structure, the anchor cable 15 is tensioned and locked as a whole by using a steel strand bundle.

[0088] In a preferred embodiment of the method for constructing the supporting pile-pile plate structure, the angle formed by the anchor cable 15 and the horizontal plane is 20 degrees.

[0089] In a preferred embodiment of the method for constructing the supporting pile-pile slab structure, the angle formed by the temporary supporting rod and the horizontal plane is 45 degrees.

[0090] In the preferred embodiment of the construction method of the supporting pile-pile plate structure, the horizontal ring reinforcement is The horizontal annular rib groove 6 has a groove depth of 150 mm and a width of 120 mm.

[0091] In the preferred embodiment of the construction method of the supporting pile-pile plate structure, the size of the prefabricated pile plate 2 is 2000×1200×100mm (height×width×thickness), the mesh reinforcement is double-layer bidirectional HPB300A10@200×200mm, and the thickness of the mesh reinforcement protective layer is 50mm.

[0092] In the preferred embodiment of the construction method of the supporting pile inter-pile plate structure, the supporting pile groove 3 is a concave groove structure provided on the pile body, and the groove has a depth of 100 mm and a width of 120 mm.

[0093] In a preferred embodiment of the construction method of the supporting pile inter-pile plate structure, the foam board 4 is an ordinary foam board.

[0094] In a preferred embodiment of the construction method of the supporting pile-pile inter-slab structure, the caulking at the joint of the groove and the tenon is made of high-strength waterproof cement mortar 5 with a grade of M30, and the water-cement ratio is preferably 0.4-0.45.

[0095] In the preferred embodiment of the construction method of the supporting pile-pile plate structure, the pile plate groove 8 is a groove provided at the bottom of the pile plate 2, with a groove depth of 100 mm and a groove width of 80 mm.

[0096] In the preferred embodiment of the construction method of the supporting pile inter-pile plate structure, the inter-pile plate tenon 7 is a tenon provided on the top of the inter-pile plate 2, and the tenon height is 100 mm and the tenon width is 60 mm.

[0097] In a preferred embodiment of the construction method of the supporting pile-pile plate structure, the pile plate lifting point 9 is set in the middle of the pile plate 2, and a U-shaped clamping ring is pre-buried in the front and back of the pile plate 2. The clamping ring specification is Ф20 round steel. After the pile plate 2 is assembled, it is cut and the holes are sealed with waterproof cement mortar 5.

[0098] In the preferred embodiment of the construction method of the supporting pile-pile plate structure, the temporary support rod 10 is a Ø48.3×3.6 mm steel pipe, the bottom of which is supported on the ground and forms an angle of 45 degrees with the pile plate 2.

[0099] In a preferred embodiment of the construction method of the supporting pile-pile-slab structure, the temporary support point 11 is only set at 2 / 3 of the height of the first pile-slab.

[0100] In a preferred embodiment of the method for constructing the supporting pile inter-pile plate structure, the grouting hole 12 is a circular hole with a diameter of 40 mm, and is connected to the inter-pile plate tenon 7 and the inter-pile plate groove 8.

[0101] In a preferred embodiment of the construction method of the supporting pile inter-pile plate structure, the slurry outlet hole 13 is a circular hole with a diameter of 40 mm, and is connected to the inter-pile plate tenon 7 and the inter-pile plate groove 8.

[0102] In the preferred embodiment of the construction method of the supporting pile-pile plate structure, the exhaust holes 14 are arranged at the four corners of the pile plate 2, are circular holes with a diameter of 20 mm, and are connected to the pile plate tenons 7 and the pile plate grooves 8.

[0103] The above only describes some exemplary embodiments of the present invention by way of illustration and is not intended to limit the scope of protection of the present invention. For those of ordinary skill in the art, the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Any changes, equivalent substitutions or improvements made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A method for constructing a supporting pile-pile inter-pile plate structure, wherein: The supporting pile-pile slab structure includes: The supporting pile (1) is a cast-in-place reinforced concrete supporting structure; it is a foundation pit supporting structure; The inter-pile plate (2) is a prefabricated component, assembled with the support piles (1) to form an integral structure for supporting soil retaining and waterproofing; A crown beam (16), the crown beam (16) being a reinforced concrete continuous beam arranged on the top of the support pile (1), and a hole for inserting the inter-pile plate (2) into the support pile (1) is reserved at the top of the crown beam (16); The support pile (1) is provided with a support pile groove (3), which is a concave groove provided on the side of the pile body of the support pile (1) and is used to fill the foam board (4) and fix the prefabricated inter-pile board (2); The reinforcement cage of the support pile (1) is provided with a horizontal ring reinforcement groove (6), wherein the horizontal ring reinforcement groove (6) is a concave groove formed at the end of a horizontal ring reinforcement that is tied and fixed to the longitudinal reinforcement of the reinforcement cage; The foam plate (4) is used to fill the horizontal ring reinforcement groove (6) before the concrete of the support pile (1) is poured; when the foundation pit is excavated in layers and sections, the foam plate (4) is removed from the horizontal ring reinforcement groove (6) to form the support pile groove (3); The left and right ends of the pile inter-plate (2) are fixed in the supporting pile groove (3); the upper and lower adjacent pile inter-plates (2) are squeezed at the concave and convex joints to form a bite state; It is characterized in that the construction method of the supporting pile inter-pile plate structure comprises the following steps: Before the concrete of the support pile (1) is poured, the ends of the horizontal ring reinforcements of the reinforcement cage of the support pile (1) are used as grooves to form horizontal ring reinforcement grooves (6), and the reinforcement cage is placed below; The horizontal ring reinforcement groove (6) is blocked with a foam board (4) and concrete is poured; After the concrete of the supporting pile (1) and the construction of the crown beam are completed, the supporting pile anchor cable (15) is constructed; Excavate the foundation pit in layers and sections, remove the foam board (4) in the reserved horizontal ring reinforcement groove (6) of the pile bodies of two adjacent piles, and after cleaning, insert the first inter-pile board (2) from the reserved hole on the top of the crown beam using a lifting device, and fix it with a temporary support rod (10) after insertion; Continue to excavate the lower soil layer, insert a second inter-pile plate (2) and connect it to the first inter-pile plate (2) after the excavation is completed, adjust the temporary support rod (10) according to the insertion depth, and push and squeeze the inter-pile plate downward at the same time; This cycle is repeated until the construction of the pile inter-slab is completed, and the edge sealing treatment is performed using an inner lining, a trowel, and a non-shrinkage high-strength fiber mortar. A grouting machine is used to inject high-strength waterproof cement mortar (5) from the grouting hole (12) into the joint between the support pile (1) and the prefabricated pile inter-slab (2) and the joint between the upper and lower pile inter-slabs (2). When the slurry of the waterproof cement mortar (5) flows out from the slurry outlet hole (13) of the pile inter-slab and the reserved hole of the crown beam, the holes are promptly blocked; The inter-pile plate (2) is provided with a grouting hole (12) and a grouting hole (13), which can communicate with the inter-pile plate groove (8), the inter-pile plate tenon (7) and the hole; after the waterproof cement mortar (5) enters the communication cavity from the grouting hole (12) of the next inter-pile plate (2), the waterproof cement mortar (5) flows upward into the inter-pile plate tenon (7) and the inter-pile plate groove (8) under the action of pressure, until the grouting flows out from the grouting hole (13) of the previous inter-pile plate (2) and the hole is blocked; The exhaust holes (14) provided on the inter-pile plate (2) are used to exhaust various gases generated by the waterproof cement mortar (5) when it expands and contracts due to heat; The anchor cable (15) is tensioned and locked by an integral steel strand bundle; it obliquely penetrates the pile body of the support pile (1) and is fixed in the soil layer, and forms an angle with the horizontal plane; the angle formed by the anchor cable (15) and the horizontal plane is 20 degrees.

2. The method for constructing a supporting pile-pile inter-pile plate structure according to claim 1 is characterized in that: The joints at the concave and convex joints are caulked with high-strength waterproof cement mortar (5) with a grade of M30 and a water-cement ratio of 0.4 to 0.

45.

3. The method for constructing a supporting pile-pile inter-pile plate structure according to claim 2 is characterized in that: The top surface of the pile inter-plate (2) is provided with a pile inter-plate tenon (7); the bottom surface of the pile inter-plate (2) is provided with a pile inter-plate groove (8); the pile inter-plate groove (8) and the pile inter-plate tenon (7) between upper and lower adjacent pile inter-plates (2) form a bite-engaged form; The groove (8) of the inter-pile plate has a groove depth of 100 mm and a groove width of 80 mm; The pile-to-pile plate convex tenon (7) has a tenon height of 100 mm and a tenon width of 60 mm.

4. The method for constructing a supporting pile-pile inter-pile plate structure according to claim 1, characterized in that: The supporting pile-pile plate structure is provided with a temporary support point (11) for fixing a temporary support rod (10); the temporary support rod (10) is a Φ48.3×3.6 mm steel pipe, the bottom of which is supported on the ground and forms an angle of 45 degrees with the pile plate (2); the temporary support point is only provided at 2 / 3 of the height of the pile plate (2).

5. The method for constructing a supporting pile-pile inter-pile plate structure according to claim 4 is characterized in that: The horizontal ring rib is Ø10@100, and the groove (6) of the horizontal ring rib has a groove depth of 150 mm and a width of 120 mm; The dimensions of the pile inter-slab (2) are 2000×1200×100 mm, the mesh reinforcement is double-layer bidirectional HPB300A10@200×200 mm, and the thickness of the mesh reinforcement protective layer is 50 mm; The supporting pile groove (3) is a concave groove structure provided on the pile body, and the groove has a depth of 100 mm and a width of 120 mm.

6. The method for constructing a supporting pile-pile inter-pile plate structure according to claim 5, characterized in that: The pile plate lifting point (9) is arranged in the middle of the pile plate (2), and a U-shaped clamping ring is pre-buried at the front and rear of the pile plate (2). The clamping ring specification is Ф20 round steel. After the pile plate (2) is assembled, it is cut and the holes are sealed with waterproof cement mortar (5).

7. The method for constructing a supporting pile-pile inter-pile plate structure according to claim 6, characterized in that: The grouting hole (12) is a circular hole with a diameter of 40 mm and is connected to the inter-pile plate tenon (7) and the inter-pile plate groove (8); The slurry outlet hole (13) is a circular hole with a diameter of 40 mm and is connected to the inter-pile plate tenon (7) and the inter-pile plate groove (8).

8. The method for constructing a supporting pile-pile inter-pile plate structure according to claim 7 is characterized in that: The exhaust holes (14) are arranged at the four corners of the inter-pile plate (2), are circular holes with a diameter of 20 mm, and are connected to the inter-pile plate tenons (7) and the inter-pile plate grooves (8).

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